WO2024012226A1 - 一种下行数据的控制信息的接收、发送方法及装置 - Google Patents

一种下行数据的控制信息的接收、发送方法及装置 Download PDF

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Publication number
WO2024012226A1
WO2024012226A1 PCT/CN2023/104100 CN2023104100W WO2024012226A1 WO 2024012226 A1 WO2024012226 A1 WO 2024012226A1 CN 2023104100 W CN2023104100 W CN 2023104100W WO 2024012226 A1 WO2024012226 A1 WO 2024012226A1
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Prior art keywords
downlink data
control information
synchronization signal
parameters
parameter
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PCT/CN2023/104100
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English (en)
French (fr)
Inventor
罗之虎
林辉
吴毅凌
金哲
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP23838719.5A priority Critical patent/EP4543121A4/en
Publication of WO2024012226A1 publication Critical patent/WO2024012226A1/zh
Priority to US19/017,946 priority patent/US20250151061A1/en
Anticipated expiration legal-status Critical
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • H04W72/1263Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/22Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028Formatting
    • H04L1/0031Multiple signaling transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094Indication of how sub-channels of the path are allocated
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H04L1/0007Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056Systems characterized by the type of code used
    • H04L1/0061Error detection codes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1864ARQ related signaling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end
    • H04L1/1896ARQ related signaling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signalling, i.e. of overhead other than pilot signals

Definitions

  • the present application relates to the field of communication technology, and in particular, to a method and device for receiving and sending control information of downlink data.
  • IoT Internet-of-things
  • the battery life of IoT terminal equipment is short, which increases the difficulty and maintenance cost of terminal equipment and has become a constraint on the development of the Internet of Things. the main bottleneck.
  • Backscatter communication based on wireless power transmission, envelope detection demodulation and reflection scattering modulation technology is expected to solve the life and maintenance problems of terminal equipment, making the next generation of terminal equipment ultra-low-cost, high-density, and maintenance-free passive
  • the Internet of Things (passive IoT) becomes possible.
  • the widely used ultra-high frequency (UHF) radio frequency identification (RFID) system is a type of backscatter communication system.
  • a typical passive UHF RFID system architecture includes a reader and a tag.
  • the reader provides energy to the tag by sending a downlink excitation signal to the tag.
  • the tag receives the signaling sent by the reader and responds through feedback. Scattering technology sends an upstream signal to the reader.
  • the network device can detect terminals in power saving mode (PSM) or sleep mode.
  • PSM power saving mode
  • WUS downlink wake-up signal
  • terminal devices In backscatter communication systems and wake-up systems, terminal devices usually blindly check the control information of downlink data, which may affect the transmission efficiency of downlink data.
  • the present application provides a method and device for receiving and sending control information of downlink data to flexibly and accurately send and receive control information of downlink data to improve the transmission efficiency of downlink data.
  • this application provides a method for receiving control information of downlink data.
  • This method can be applied to a first device, a processor, a chip or a functional module in the first device, etc.
  • the method may include: the first device receives a synchronization signal from the second device, and at least one parameter of the control information of downlink data is related to the synchronization signal. Then, the first device may receive the control information of the downlink data from the second device according to the at least one parameter of the control information of the downlink data; furthermore, the first device may receive the control information of the downlink data according to the at least one parameter of the control information of the downlink data. control information to receive the downlink data from the second device.
  • the at least one parameter includes a resource location of the control information of the downlink data or a first parameter of the control information of the downlink data, and the control information of the downlink data is used for scheduling the downlink data.
  • the reception of the control information of the downlink data is clarified through the synchronization signal, which can avoid blind detection of the control information of the downlink data, thereby improving the transmission efficiency of the downlink data.
  • synchronization complexity can also be reduced by not carrying the control information of downlink data through synchronization signals.
  • the synchronization signal includes one or more of the following functions: automatic gain control (AGC), time synchronization, frequency synchronization, packet detection or boundary detection. Furthermore, AGC can be used to adjust the strength of the received signal to reduce distortion. Time synchronization can be used by obtaining correct timing or sampling timing. Boundary detection can be used to detect the boundaries of the preamble sequence and/or downlink data.
  • AGC automatic gain control
  • time synchronization can be used by obtaining correct timing or sampling timing.
  • Boundary detection can be used to detect the boundaries of the preamble sequence and/or downlink data.
  • the synchronization signal is located before the control information of the downlink data, and the control information of the downlink data is located before the downlink data. In this way, the first device can accurately receive corresponding signals or data in sequence.
  • the resource location of the control information of the downlink data is related to the synchronization signal, which may include: the time domain location of the control information of the downlink data may be determined based on the time domain location of the synchronization signal, and/or, control of the downlink data
  • the frequency domain location of the information may be determined based on the frequency domain location of the synchronization signal.
  • the starting time domain position of the control information of the downlink data is adjacent to the ending time domain position of the synchronization signal; or, the starting time domain position of the control information of the downlink data is adjacent to the ending time domain position of the synchronization signal.
  • the first time interval is preset, or the first time interval is configured by the second device, or the first time interval is related to parameters of the synchronization signal;
  • the second The time interval is preset, or the second time interval is configured by the second device, or the second time interval is related to parameters of the synchronization signal;
  • the third time interval is preset , or the third time interval is configured by the second device, or the third time interval is related to the parameters of the synchronization signal;
  • the parameters of the synchronization signal include one or more of the following: The sequence of the synchronization signal, the length of the synchronization signal, the number of repetitions of the synchronization signal or the spreading factor of the synchronization signal. In this way, the time domain resource location of the control information of the downlink data can be determined flexibly and accurately through the synchronization signal in a variety of ways.
  • the center frequency point of the frequency domain resource of the control information of the downlink data may be the same as the center frequency point of the frequency domain resource of the synchronization signal, and the bandwidth of the control information of the downlink data is the same as the center frequency point of the frequency domain resource of the synchronization signal.
  • the bandwidth of the synchronization signal is different; or the frequency domain resources of the control information of the downlink data are the same as the frequency domain resources of the synchronization signal; or the starting frequency domain position of the control information of the downlink data is the same as that of the synchronization signal.
  • first frequency domain interval between the ending frequency domain positions of the signal; or, there is a second frequency domain interval between the starting frequency domain position of the control information of the downlink data and the starting frequency domain position of the synchronization signal; Alternatively, the end frequency domain position of the control information of the downlink data and the end frequency domain position of the synchronization signal are separated by a third frequency domain interval.
  • first frequency domain interval is preset, or the first frequency domain interval is configured by the second device, or the first frequency domain interval is related to parameters of the synchronization signal.
  • the second frequency domain interval is preset, or the second frequency domain interval is configured by the second device, or the second frequency domain interval is related to parameters of the synchronization signal.
  • the third frequency domain interval is preset, or the third frequency domain interval is configured by the second device, or the third frequency domain interval is related to parameters of the synchronization signal.
  • the parameters of the synchronization signal include one or more of the following: a sequence of the synchronization signal, a length of the synchronization signal, a repetition number of the synchronization signal, or a spreading factor of the synchronization signal. In this way, the frequency domain resource location of the control information of the downlink data can be determined flexibly and accurately through the frequency domain resources of the synchronization signal in a variety of ways.
  • the number of bits of the control information of the downlink data is less than X, the control information of the downlink data does not use cyclic redundancy check (CRC), and the downlink data uses CRC , the X is a positive integer; or, the control information of the downlink data uses CRC, the downlink data uses CRC, the number of bits corresponding to the CRC used by the control information of the downlink data is L1, and the downlink data uses The number of bits corresponding to the CRC is L2, and the L1 and the L2 are different positive integers. Assume that the number of bits occupied by the control information of downlink data is recorded as N1, and the number of CRC bits used by the control information of downlink data is recorded as L1.
  • L1 When the control information of downlink data does not use CRC, L1 can be considered to be 0. Generally speaking, N1 It is smaller than the number of bits occupied by the downlink data. At this time, L1 adopts a relatively small value, which can reduce the CRC overhead, that is, it can reduce L1/(N1+L1), which in turn can reduce the resources required to transmit the control information of the downlink data.
  • L1 is 6, and L2 is 16 or 24. This implementation is relatively simple.
  • the L1 may be determined based on the number of bits of the control information of the downlink data. Assume that the number of bits occupied by the control information of downlink data is recorded as N1, and the number of CRC bits used by the control information of downlink data is recorded as L1. When the control information of downlink data does not use CRC, L1 can be considered to be 0, and the number of L1 is determined based on N1. The value allows the CRC overhead to be flexibly adjusted. When N1 is small, a smaller L1 can be used, which can reduce the CRC overhead, that is, L1/(N1+L1) can be reduced; when N1 is large, a larger L1 can be used. L1 can maintain an acceptable CRC overhead while ensuring the performance of CRC check, because the longer the number of CRC bits, the stronger the ability to detect errors.
  • the L1 is determined based on the number of bits of the control information of the downlink data.
  • the method may be: when the number of bits of the control information of the downlink data is less than or equal to the first value, the L1 is 6; When the number of bits of the control information of the downlink data is greater than the first value, the L1 is 11. Assume that the number of bits occupied by the control information of downlink data is recorded as N1, and the number of CRC bits used by the control information of downlink data is recorded as L1. When the control information of downlink data does not use CRC, L1 can be considered to be 0, and the number of L1 is determined based on N1. The value allows the CRC overhead to be flexibly adjusted.
  • L1 When N1 is small, a smaller L1 can be used, which can reduce the CRC overhead, that is, L1/(N1+L1) can be reduced; when N1 is large, a larger L1 can be used. L1 can maintain an acceptable CRC overhead while ensuring the performance of CRC check, because the longer the number of CRC bits, the stronger the ability to detect errors.
  • the control information of the downlink data and the downlink data support channel coding, and the downlink data The channel coding type supported by the control information and the downlink data is the same.
  • the control information of downlink data and downlink data support channel coding which can improve the reliability of downlink data control information and downlink data transmission. Both use the same channel coding type.
  • the same encoder can be reused, which can reduce the implementation complexity of the second device.
  • the same decoder can be reused. The implementation complexity of the first device can be reduced.
  • the control information of the downlink data includes a field used to indicate the transmission block size of the downlink data or a field used to indicate the code block size of the downlink data.
  • the control information of the downlink data includes a field used to indicate the transmission block size of the downlink data or a field used to indicate the code block size of the downlink data.
  • the second device can correctly decode the downlink data based on the control information of the downlink data to avoid Blind detection is performed on the transmission block size of the downlink data or the code block size of the downlink data, thereby reducing the complexity of decoding the downlink data by the first device.
  • the first parameter of the control information of the downlink data is related to the synchronization signal, which may include: the first parameter of the control information of the downlink data may be determined based on the parameters of the synchronization signal;
  • the parameters of the synchronization signal include one or more of the following: a sequence of the synchronization signal, a length of the synchronization signal, a repetition number of the synchronization signal, or a spreading factor of the synchronization signal.
  • the first parameter of the control information of the downlink data may include one or more of the following: a bandwidth of the control information of the downlink data, a subcarrier spacing of the control information of the downlink data, the The cyclic prefix (CP) type of the control information of the downlink data, the line code parameters of the control information of the downlink data, the channel coding parameters of the control information of the downlink data, and the modulation of the control information of the downlink data mode, the number of repetitions of the control information of the downlink data, the spreading factor of the control information of the downlink data, the data rate of the control information of the downlink data, the time length of the control information of the downlink data, the The modulation depth of the control information of the data or the duty cycle of the control information of the downlink data.
  • the subsequent first device can accurately receive the control information of the downlink data through the above parameters.
  • the coverage level of the synchronization signal corresponds to the parameters of the synchronization signal
  • the parameters of the synchronization signal include one or more of the following: the sequence of the synchronization signal, the length of the synchronization signal , the number of repetitions of the synchronization signal or the spreading factor of the synchronization signal.
  • the control information of the downlink data may include one or more of the following: the bandwidth of the downlink data, the frequency domain resource location of the downlink data, the time resource location of the downlink data, the The subcarrier spacing of the downlink data, the CP type of the downlink data, the line code parameters of the downlink data, the channel coding parameters of the downlink data, the modulation mode of the downlink data, the number of repetitions of the downlink data, The spreading factor of the downlink data, the data rate of the downlink data, the time length of the downlink data, the modulation depth of the downlink data, the duty cycle of the downlink data, and the occupied time of the downlink data The number of units or redundant versions of said downstream data. In this way, the first device can accurately receive downlink data through the above content.
  • the value range of the second parameter in the control information of the downlink data may be related to the parameters of the synchronization signal; wherein the parameters of the synchronization signal may include one or more of the following: The sequence of the synchronization signal, the length of the synchronization signal, the number of repetitions of the synchronization signal or the spreading factor of the synchronization signal; the second parameter in the control information of the downlink data may include one or more of the following Items: the number of repetitions of the downlink data, the modulation mode of the downlink data, the channel coding parameters of the downlink data or the line code parameters of the downlink data. In this way, the above second parameter can be accurately determined based on the actual synchronization signal.
  • control information of the downlink data may indicate the modulation mode of the downlink data and the channel coding parameter of the downlink data through a first index. This can reduce the signaling overhead indicated by the control information of downlink data.
  • control information of the downlink data may include first indication information and/or second indication information; the first indication information is used to indicate whether channel coding is enabled for the downlink data; and the second indication information The indication information is used to indicate whether the downlink data has a terminator. This can flexibly indicate the transmission mode of downlink data.
  • the control information of the downlink data when the control information of the downlink data indicates that the downlink data enables channel coding, the control information of the downlink data includes a modulation and coding scheme (modulation and coding) used to determine the downlink data. scheme, MCS) or the information of the channel coding parameters of the downlink data; when the control information of the downlink data indicates that the downlink data does not enable channel coding, the control information of the downlink data includes information for determining the downlink data. Information about the number of repetitions of the data. This allows flexible control of the transmission of downlink data.
  • modulation and coding modulation and coding
  • the information used to determine the MCS of the downlink data or the channel coding parameter of the downlink data occupies the same bits as the information used to determine the number of repetitions of the downlink data. In this way, the same bits can be used to indicate different functions under different circumstances, reducing bit occupation.
  • the control information of the downlink data when the second indication information indicates that the downlink data has no terminator, may include a field used to indicate the transport block size of the downlink data or a field used to indicate the downlink data.
  • the first device receives first information from the second device, and the first information is used to indicate the coverage level of the synchronization signal corresponding to the downlink data after the downlink data. In this way, when the coverage level needs to be switched, the coverage level can be switched in time to improve the accuracy of data transmission.
  • this application provides a method for sending control information of downlink data.
  • This method can be applied to a first device, a processor, a chip or a functional module in the first device, etc.
  • the method may include: the second device sends a synchronization signal to the first device, and at least one parameter of the control information of the downlink data is related to the synchronization signal. Then, the second device may send the control information of the downlink data to the first device according to the at least one parameter of the control information of the downlink data. Furthermore, the second device sends the downlink data to the first device according to the control information of the downlink data.
  • the at least one parameter may include a resource location of the control information of the downlink data or a first parameter of the control information of the downlink data, and the control information of the downlink data is used for scheduling the downlink data.
  • the transmission of the control information of the downlink data is clarified through the synchronization signal, which can avoid blind detection of the control information of the downlink data by the first device, thereby improving the transmission efficiency of the downlink data.
  • synchronization complexity can also be reduced by not carrying the control information of downlink data through synchronization signals.
  • the synchronization signal includes one or more of the following functions: automatic gain control AGC, time synchronization, frequency synchronization, data packet detection or boundary detection. Furthermore, AGC can be used to adjust the strength of the received signal to reduce distortion. Time synchronization can be used by obtaining correct timing or sampling timing. Boundary detection can be used to detect the boundaries of the preamble sequence and/or downlink data.
  • the synchronization signal is located before the control information of the downlink data, and the control information of the downlink data is located before the downlink data. In this way, the second device can accurately send the corresponding signals or data in sequence.
  • the resource location of the control information of the downlink data is related to the synchronization signal, which may include: the time domain location of the control information of the downlink data is determined based on the time domain location of the synchronization signal, and /Or, the frequency domain position of the control information of the downlink data is determined based on the frequency domain position of the synchronization signal.
  • the resource location of the control information of the downlink data can be accurately determined based on the time domain location and/or frequency domain location of the synchronization signal.
  • the starting time domain position of the control information of the downlink data is adjacent to the ending time domain position of the synchronization signal; or, the starting time domain position of the control information of the downlink data is adjacent to the ending time domain position of the synchronization signal.
  • the first time interval is preset, or the first time interval is configured by the second device, or the first time interval is related to parameters of the synchronization signal;
  • the second The time interval is preset, or the second time interval is configured by the second device, or the second time interval is related to parameters of the synchronization signal;
  • the third time interval is preset , or the third time interval is configured by the second device, or the third time interval is related to the parameters of the synchronization signal;
  • the parameters of the synchronization signal include one or more of the following: The sequence of the synchronization signal, the length of the synchronization signal, the number of repetitions of the synchronization signal or the spreading factor of the synchronization signal. In this way, the time domain resource location of the control information of the downlink data can be determined flexibly and accurately through the synchronization signal in a variety of ways.
  • the center frequency point of the frequency domain resource of the control information of the downlink data may be the same as the center frequency point of the frequency domain resource of the synchronization signal, and the bandwidth of the control information of the downlink data is the same as the center frequency point of the frequency domain resource of the synchronization signal.
  • the bandwidth of the synchronization signal is different; or the frequency domain resource of the control information of the downlink data can be the same as the frequency domain resource of the synchronization signal; or the starting frequency domain position of the control information of the downlink data is the same as that of the synchronization signal.
  • the ending frequency domain position of the synchronization signal may be separated by a first frequency domain interval; or, the starting frequency domain position of the control information of the downlink data and the starting frequency domain position of the synchronization signal may be separated by a second frequency domain interval. interval; or, there is a third frequency domain interval between the end frequency domain position of the control information of the downlink data and the end frequency domain position of the synchronization signal.
  • the first frequency domain interval is preset, or the first frequency domain interval is configured by the second device, or the first frequency domain interval is related to parameters of the synchronization signal.
  • the second frequency domain interval is preset, or the second frequency domain interval is configured by the second device, or the second frequency domain interval is related to parameters of the synchronization signal.
  • the third frequency domain interval is preset, or the third frequency domain interval is configured by the second device, or the third frequency domain interval is related to parameters of the synchronization signal.
  • the parameters of the synchronization signal include one or more of the following: a sequence of the synchronization signal, a length of the synchronization signal, a repetition number of the synchronization signal or an expansion of the synchronization signal. frequency factor. In this way, the frequency domain resource location of the control information of the downlink data can be determined flexibly and accurately through the frequency domain resources of the synchronization signal in a variety of ways.
  • the number of bits of the control information of the downlink data is less than X
  • the control information of the downlink data does not use cyclic redundancy check code CRC
  • the downlink data uses CRC
  • X is positive Integer
  • the control information of the downlink data uses CRC
  • the downlink data uses CRC
  • the number of bits corresponding to the CRC used by the control information of the downlink data is L1
  • the number of bits corresponding to the CRC used by the downlink data is L2
  • the L1 and the L2 are different positive integers. Assume that the number of bits occupied by the control information of downlink data is recorded as N1, and the number of CRC bits used by the control information of downlink data is recorded as L1.
  • L1 When the control information of downlink data does not use CRC, L1 can be considered to be 0. Generally speaking, N1 It is smaller than the number of bits occupied by the downlink data. At this time, L1 adopts a relatively small value, which can reduce the CRC overhead, that is, it can reduce L1/(N1+L1), which in turn can reduce the resources required to transmit the control information of the downlink data.
  • L1 is 6, and L2 is 16 or 24. This implementation is relatively simple.
  • the L1 may be determined based on the number of bits of the control information of the downlink data. Assume that the number of bits occupied by the control information of downlink data is recorded as N1, and the number of CRC bits used by the control information of downlink data is recorded as L1. When the control information of downlink data does not use CRC, L1 can be considered to be 0, and the number of L1 is determined based on N1. The value allows the CRC overhead to be flexibly adjusted. When N1 is small, a smaller L1 can be used, which can reduce the CRC overhead, that is, L1/(N1+L1) can be reduced; when N1 is large, a larger L1 can be used. L1 can maintain an acceptable CRC overhead while ensuring the performance of CRC check, because the longer the number of CRC bits, the stronger the ability to detect errors.
  • the L1 is determined based on the number of bits of the control information of the downlink data.
  • the method may be: when the number of bits of the control information of the downlink data is less than or equal to the first value, the L1 is 6; When the number of bits of the control information of the downlink data is greater than the first value, the L1 is 11. Assume that the number of bits occupied by the control information of downlink data is recorded as N1, and the number of CRC bits used by the control information of downlink data is recorded as L1. When the control information of downlink data does not use CRC, L1 can be considered to be 0, and the number of L1 is determined based on N1. The value allows the CRC overhead to be flexibly adjusted.
  • L1 When N1 is small, a smaller L1 can be used, which can reduce the CRC overhead, that is, L1/(N1+L1) can be reduced; when N1 is large, a larger L1 can be used. L1 can maintain an acceptable CRC overhead while ensuring the performance of CRC check, because the longer the number of CRC bits, the stronger the ability to detect errors.
  • control information of the downlink data and the downlink data support channel coding and the control information of the downlink data and the channel coding type supported by the downlink data are the same.
  • the control information of downlink data and downlink data support channel coding which can improve the reliability of downlink data control information and downlink data transmission. Both use the same channel coding type.
  • the same encoder can be reused, which can reduce the implementation complexity of the second device.
  • the same decoder can be reused. The implementation complexity of the first device can be reduced.
  • the control information of the downlink data includes a field used to indicate the transmission block size of the downlink data or a field used to indicate the code block size of the downlink data.
  • the control information of the downlink data includes a field used to indicate the transmission block size of the downlink data or a field used to indicate the code block size of the downlink data.
  • the second device can correctly decode the downlink data based on the control information of the downlink data to avoid Blind detection is performed on the transmission block size of the downlink data or the code block size of the downlink data, thereby reducing the complexity of decoding the downlink data by the first device.
  • the first parameter of the control information of the downlink data is related to the synchronization signal, which may be: the first parameter of the control information of the downlink data may be determined based on the parameters of the synchronization signal;
  • the parameters of the synchronization signal may include one or more of the following: a sequence of the synchronization signal, a length of the synchronization signal, a repetition number of the synchronization signal, or a spreading factor of the synchronization signal.
  • the first parameter of the control information of the downlink data may include one or more of the following: a bandwidth of the control information of the downlink data, a subcarrier spacing of the control information of the downlink data, the The cyclic prefix CP type of the control information of the downlink data, the line code parameters of the control information of the downlink data, the channel coding parameters of the control information of the downlink data, the modulation mode of the control information of the downlink data, the downlink The number of repetitions of the control information of the data, the spreading factor of the control information of the downlink data, the data rate of the control information of the downlink data, the time length of the control information of the downlink data, the time length of the control information of the downlink data. Modulation depth or duty cycle of the control information of the downlink data. In this way, the second device can accurately send the control information of the downlink data through the above parameters.
  • the coverage level of the synchronization signal corresponds to the parameters of the synchronization signal.
  • the parameters of the synchronization signal may include one or more of the following: a sequence of the synchronization signal, a sequence of the synchronization signal, length, the number of repetitions of the synchronization signal or the spreading factor of the synchronization signal. In this way, the coverage level of the synchronization signal can be accurately determined through the parameters of the synchronization signal, so that the first device can To determine the downlink channel quality based on the synchronization signal.
  • the control information of the downlink data may include one or more of the following: the bandwidth of the downlink data, the frequency domain resource location of the downlink data, the time resource location of the downlink data, the The subcarrier spacing of the downlink data, the CP type of the downlink data, the line code parameters of the downlink data, the channel coding parameters of the downlink data, the modulation mode of the downlink data, the number of repetitions of the downlink data, The spreading factor of the downlink data, the data rate of the downlink data, the time length of the downlink data, the modulation depth of the downlink data, the duty cycle of the downlink data, and the occupied time of the downlink data The number of units or redundant versions of said downstream data. In this way, the subsequent second device can accurately send downlink data through the above content.
  • the value range of the second parameter in the control information of the downlink data may be related to the parameters of the synchronization signal;
  • the parameters of the synchronization signal may include one or more of the following: The sequence of synchronization signals, the length of the synchronization signals, the number of repetitions of the synchronization signals, or the spreading factor of the synchronization signals;
  • the second parameter in the control information of the downlink data may include one or more of the following: The number of repetitions of the downlink data, the modulation mode of the downlink data, the channel coding parameters of the downlink data or the line code parameters of the downlink data. In this way, the above second parameter can be accurately determined based on the actual synchronization signal.
  • control information of the downlink data indicates the modulation mode of the downlink data and the channel coding parameter of the downlink data through a first index. This can reduce the signaling overhead indicated by the control information of downlink data.
  • control information of the downlink data may include first indication information and/or second indication information; the first indication information is used to indicate whether channel coding is enabled for the downlink data; and the second indication information The indication information is used to indicate whether the downlink data has a terminator. This can flexibly indicate the transmission mode of downlink data.
  • the control information of the downlink data when the control information of the downlink data indicates that the downlink data enables channel coding, the control information of the downlink data includes the modulation and coding scheme MCS or channel coding parameters used to determine the downlink data.
  • Information when the control information of the downlink data indicates that the downlink data does not enable channel coding, the control information of the downlink data includes information for determining the number of repetitions of the downlink data. This can flexibly indicate the transmission mode of downlink data.
  • the information used to determine the MCS or channel coding parameter of the downlink data occupies the same bits as the information used to determine the number of repetitions of the downlink data. In this way, the same bits can be used to indicate different functions under different circumstances, reducing bit occupation.
  • the control information of the downlink data when the second indication information indicates that the downlink data has no terminator, includes a field for indicating the transport block size of the downlink data or a field for indicating the downlink data field of the code block size; when the second indication information indicates that the downlink data has an end character, the control information of the downlink data includes a field for indicating the MCS of the downlink data or for indicating the repetition of the downlink data. times field. This allows flexible control of the transmission of downlink data.
  • the second device determines that the coverage level of the synchronization signal corresponding to the downlink data after the downlink data needs to be updated; further, the second device can send the first information to the first device, The first information is used to indicate the coverage level of the synchronization signal corresponding to the downlink data after the downlink data. In this way, when the coverage level needs to be switched, the coverage level can be switched in time to improve the accuracy of data transmission.
  • the present application provides a method for receiving and sending control information of downlink data.
  • the method may include: the second device sends a synchronization signal to the first device, and accordingly, the first device receives the synchronization signal from the second device.
  • Synchronization signal, at least one parameter of the control information of downlink data is related to the synchronization signal, and the at least one parameter includes the resource location of the control information of the downlink data or the first parameter of the control information of the downlink data,
  • the control information of the downlink data is used to schedule the downlink data; subsequently, the second device sends the control of the downlink data to the first device according to the at least one parameter of the control information of the downlink data.
  • the first device receives the control information of the downlink data from the second device according to the at least one parameter of the control information of the downlink data; finally, the second device receives the control information of the downlink data according to the at least one parameter of the control information of the downlink data.
  • the control information of the downlink data sends the downlink data to the first device; accordingly, the first device receives the downlink data from the second device according to the control information of the downlink data.
  • the reception of the control information of the downlink data is clarified through the synchronization signal, which can avoid blind detection of the control information of the downlink data, thereby improving the transmission efficiency of the downlink data.
  • synchronization complexity can also be reduced by not carrying the control information of downlink data through synchronization signals.
  • the resource location of the control information of the downlink data is related to the synchronization signal, which may include: the time domain location of the control information of the downlink data is determined based on the time domain location of the synchronization signal, and /Or, the frequency domain position of the control information of the downlink data is determined based on the frequency domain position of the synchronization signal.
  • the resource location of the control information of the downlink data can be accurately determined based on the time domain location and/or frequency domain location of the synchronization signal.
  • the starting time domain position of the control information of the downlink data is consistent with the ending time domain position of the synchronization signal. adjacent; or, there is a first time interval between the starting time domain position of the control information of the downlink data and the ending time domain position of the synchronization signal; the first time interval is preset, or the third time interval is A time interval is configured for the second device, or the first time interval is related to parameters of the synchronization signal.
  • the parameters of the synchronization signal include one or more of the following: a sequence of the synchronization signal, The length of the synchronization signal, the number of repetitions of the synchronization signal, or the spreading factor of the synchronization signal. In this way, the time domain resource location of the control information of the downlink data can be determined flexibly and accurately through the synchronization signal in a variety of ways.
  • the number of bits of the control information of the downlink data is less than X, the control information of the downlink data does not use a cyclic redundancy check code CRC, and the X is a positive integer; or, the downlink data
  • the control information of the data uses CRC
  • the downlink data uses CRC
  • the number of bits corresponding to the CRC used in the control information of the downlink data is L1
  • the number of bits corresponding to the CRC used in the downlink data is L2
  • L1 When the control information of downlink data does not use CRC, L1 can be considered to be 0. Generally speaking, N1 It is smaller than the number of bits occupied by the downlink data. At this time, L1 adopts a relatively small value, which can reduce the CRC overhead, that is, it can reduce L1/(N1+L1), which in turn can reduce the resources required to transmit the control information of the downlink data.
  • the first parameter of the control information of the downlink data is related to the synchronization signal, which may include: the first parameter of the control information of the downlink data is determined based on the parameters of the synchronization signal;
  • the parameters of the synchronization signal include one or more of the following: a sequence of the synchronization signal, a length of the synchronization signal, a repetition number of the synchronization signal, or a spreading factor of the synchronization signal.
  • the first parameter of the control information of the downlink data includes one or more of the following: a bandwidth of the control information of the downlink data, a subcarrier spacing of the control information of the downlink data, the The cyclic prefix CP type of the control information of the downlink data, the line code parameters of the control information of the downlink data, the channel coding parameters of the control information of the downlink data, the modulation mode of the control information of the downlink data, the downlink data The number of repetitions of the control information, the spreading factor of the control information of the downlink data, the data rate of the control information of the downlink data, the time length of the control information of the downlink data, the modulation of the control information of the downlink data Depth or duty cycle of the control information of the downlink data. In this way, the first device can accurately receive the control information of the downlink data through the above parameters.
  • the control information of the downlink data includes one or more of the following: the bandwidth of the downlink data, the frequency domain resource location of the downlink data, the time resource location of the downlink data, the The subcarrier spacing of the downlink data, the CP type of the downlink data, the line code parameters of the downlink data, the channel coding parameters of the downlink data, the modulation mode of the downlink data, the number of repetitions of the downlink data, the The spreading factor of the downlink data, the data rate of the downlink data, the time length of the downlink data, the modulation depth of the downlink data, the duty cycle of the downlink data, and the occupied time unit of the downlink data number or redundant version of the downstream data.
  • the first device can accurately receive downlink data through the above content.
  • the value range of the second parameter in the control information of the downlink data is related to the parameters of the synchronization signal;
  • the parameters of the synchronization signal include one or more of the following: the synchronization signal sequence, the length of the synchronization signal, the number of repetitions of the synchronization signal or the spreading factor of the synchronization signal;
  • the second parameter in the control information of the downlink data includes one or more of the following: the downlink The number of repetitions of data, the modulation mode of the downlink data, the channel coding parameters of the downlink data or the line code parameters of the downlink data.
  • the present application also provides a device for sending control information of downlink data.
  • the device for sending control information of downlink data has various possible design examples for implementing the above-mentioned first aspect or the first aspect, or the above-mentioned Functionality of the first device in the third aspect or in each possible design example of the third aspect.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the device for sending downlink data control information includes a transceiver unit and a processing unit. These units may execute the above-mentioned first aspect or each possible design example of the first aspect, or the above-mentioned third aspect.
  • a transceiver unit and a processing unit.
  • These units may execute the above-mentioned first aspect or each possible design example of the first aspect, or the above-mentioned third aspect.
  • the first device in each possible design example of the three aspects or the third aspect please refer to the detailed description in the method example and will not be described again here.
  • the structure of the device for sending downlink data control information includes a transceiver and a processor, optionally also including a memory.
  • the transceiver is used to send and receive information, signals or data, and is used to communicate with Other devices in the communication system perform communication interactions
  • the processor is configured to support the sending means of the control information of the downlink data in executing the above-mentioned first aspect or each possible design example of the first aspect, or the above-mentioned third aspect. or corresponding functions of the first device in each possible design example of the third aspect.
  • the memory is coupled to the processor, and stores necessary program instructions and data for a device for sending control information of downlink data.
  • the structure of the device for sending control information of downlink data includes a memory and a processor, and the processor is configured to support the device for sending control information of downlink data in executing the above first aspect or Possible settings for the first aspect corresponding functions of the first device in the above design example, or in the above third aspect or each possible design example of the third aspect.
  • the memory is coupled to the processor, and stores necessary program instructions and data for a device for sending control information of downlink data.
  • the present application also provides a device for receiving control information of downlink data.
  • the device for receiving control information of downlink data has various possible design examples for implementing the above-mentioned second aspect or the second aspect, or the above-mentioned third aspect. Functionality of the second device in each possible design example of the three or third aspects.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the device for receiving control information of downlink data includes a transceiver unit and a processing unit. These units may execute the above second aspect or each possible design example of the second aspect, or the above third aspect.
  • a transceiver unit and a processing unit.
  • These units may execute the above second aspect or each possible design example of the second aspect, or the above third aspect.
  • the corresponding functions of the second device in each possible design example of the third aspect or the third aspect please refer to the detailed description in the method example and will not be described again here.
  • the structure of the device for receiving control information of downlink data includes a transceiver and a processor, and optionally a memory.
  • the transceiver is used to send and receive information, signals or data, and is used to communicate with Other devices in the communication system perform communication interactions
  • the processor is configured to support the receiving device of the control information of the downlink data in executing the above second aspect or each possible design example of the second aspect, or the above third aspect. or corresponding functions of the second device in each possible design example of the third aspect.
  • the memory is coupled to the processor, and stores necessary program instructions and data for a receiving device of control information of the downlink data.
  • the structure of the device for receiving control information of downlink data includes a memory and a processor, and the processor is configured to support the device for receiving control information of downlink data in performing the above second aspect or The corresponding functions of the second device in each possible design example of the second aspect, or in the above-mentioned third aspect or each possible design example of the third aspect.
  • the memory is coupled to the processor, and stores necessary program instructions and data for a receiving device of control information of the downlink data.
  • embodiments of the present application provide a communication system, which may include the above-mentioned first device and second device.
  • embodiments of the present application provide a computer-readable storage medium.
  • the computer-readable storage medium stores program instructions. When the program instructions are run on a computer, they cause the computer to execute the first aspect of the embodiments of the application and its operations. Any possible design, or the method described in the second aspect and any possible design thereof.
  • computer-readable storage media can be any available media that can be accessed by a computer.
  • computer-readable media may include non-transitory computer-readable media, random-access memory (random-access memory, RAM), read-only memory (read-only memory, ROM), electrically erasable memory
  • RAM random-access memory
  • ROM read-only memory
  • programmable read-only memory electrically EPROM, EEPROM
  • CD-ROM or other optical disk storage magnetic disk storage media or other magnetic storage devices, or can be used to carry or store the desired program code in the form of instructions or data structures and can Any other media accessed by a computer.
  • embodiments of the present application provide a computer program product including computer program code or instructions, which, when run on a computer, enables the computer to implement the above-mentioned first aspect or any possible design of the first aspect, or the third aspect.
  • the present application also provides a chip, including a processor, the processor being coupled to a memory and configured to read and execute program instructions stored in the memory, so that the chip implements the above first aspect Or any possible design of the first aspect, or the second aspect or any possible design of the second aspect, or the method described in the third aspect or any possible design of the third aspect.
  • Figure 1a is a schematic architectural diagram of a communication system provided by this application.
  • Figure 1b is a schematic diagram of a signal envelope provided by this application.
  • Figure 2 is a flow chart of a method for sending and receiving control information of downlink data provided by this application;
  • Figure 3 is a schematic diagram illustrating the start time domain position of the control information of downlink data and the end time domain position of the synchronization signal adjacent to each other provided by this application;
  • Figure 4 is a schematic diagram of a first time interval between the starting time domain position of the control information of downlink data and the ending time domain position of the synchronization signal provided by this application;
  • Figure 5 shows a method provided by the present application in which the center frequency point of the frequency domain resource of the control information of downlink data is the same as the center frequency point of the frequency domain resource of the synchronization signal, and the bandwidth of the control information of the downlink data is different from the bandwidth of the synchronization signal.
  • Figure 6 is a schematic diagram illustrating that the frequency domain resources of the control information of downlink data and the frequency domain resources of the synchronization signal are the same as provided by this application;
  • Figure 7 is a schematic diagram of a second frequency domain interval between the starting frequency domain position of the control information of downlink data and the starting frequency domain position of the synchronization signal provided by this application;
  • Figure 8 is a schematic diagram of the correlation between synchronization signals of different repetition levels and control information of downlink data provided by this application;
  • Figure 9 is a schematic diagram of the communication process between a reader/writer and a tag provided by this application.
  • FIG. 10 is a schematic diagram of coverage level switching provided by this application.
  • Figure 11 is a schematic structural diagram of a communication device provided by this application.
  • Figure 12 is a structural diagram of a communication device provided by this application.
  • Embodiments of the present application provide a method and device for receiving and sending control information of downlink data to flexibly and accurately send and receive control information of downlink data to improve the transmission efficiency of downlink data.
  • the method and the device described in this application are based on the same technical concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repeated parts will not be repeated.
  • At least one (species) refers to one (species) or multiple (species), and multiple (species) refers to two (species) or more than two (species).
  • At least one of the following" or similar expressions thereof refers to any combination of these items, including any combination of single or plural items.
  • at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c Can be single or multiple.
  • the communication method provided by this application can be applied to various communication systems.
  • the embodiments of this application can be applied to Internet of Things (IoT) networks, backscatter communication systems or wake-up systems.
  • IoT Internet of Things
  • the embodiments of the present application can also be applied to other possible communication systems, such as long term evolution (long term evolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division) system duplex (TDD), advanced long-term evolution (LTE advanced, LTE-A) system, universal mobile telecommunication system (UMTS), global interoperability for microwave access (WiMAX) communication system,
  • the fifth generation (5th generation, 5G) communication system such as the new radio (NR) system
  • 6th generation, 6G sixth generation
  • FIG. 1a shows the architecture of a possible communication system to which the communication method provided by this application is applicable.
  • the structure of the communication system may include at least one network device and at least one terminal device.
  • the communication system may include two network devices, network device 1 and network device 2, and eight terminal devices from terminal device 1 to terminal device 8.
  • the network device 1 can send information to one or more terminal devices among the terminal devices 1 to 6 .
  • Network device 1 may send information to one or more terminal devices among terminal device 7 and terminal device 8 through network device 2.
  • terminal device 4 to terminal device 6 may also form a sub-communication system.
  • terminal device 5 may send information to one or more terminal devices among terminal device 4 and terminal device 6.
  • Network device 2, terminal device 7 and terminal device 8 can also form a sub-communication system.
  • network device 2 can send information to one or more terminal devices among terminal device 7 and terminal device 8. It should be understood that FIG. 1a is only a schematic diagram, and this application does not specifically limit the type of communication system, as well as the number and type of devices included in the communication system.
  • the network device may be a device with a wireless transceiver function or a chip that can be disposed on the network device.
  • the network device includes but is not limited to: LTE base station (eNodeB), NR base station (generation node B, gNB), wireless network Controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home Node B, HNB), baseband unit (BBU), access point in a wireless fidelity (Wi-Fi) system ( access point, AP), wireless relay node, wireless backhaul node, transmission point reception point (transmission and reception point, TRP), transmission point (transmission point, TP), etc., and can also be network nodes that constitute a gNB or transmission point , such as baseband unit (BBU), or distributed unit (DU), etc.
  • BBU wireless network Controller
  • the network equipment When the network equipment is a base station, it can be a macro base station, a micro base station, a small base station, or a pole station.
  • the network device may be a network device that supports receiving data transmitted through transmit communication, or a network device that supports sending a wake-up signal.
  • the terminal equipment may also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment , user agent or user device.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal device, or an augmented reality (AR) terminal.
  • the terminal device may be a terminal device that supports a wake-up receiver, or a terminal device that does not support a wake-up receiver.
  • the end device may be an end device that supports reflective communication, such as a tag.
  • the terminal device may also be a chip or chip module (or chip system) that can be installed on the above device.
  • terminal equipment when terminal equipment needs to receive downlink data, it usually blindly checks the control information of the downlink data. After blindly detecting the control information of the downlink data, it then receives the downlink data based on the control information of the downlink data. However, this may affect the downlink data. Data transmission efficiency.
  • Backscatter communication systems and wake-up systems are generally asynchronous systems, that is, terminal equipment and network equipment do not achieve strict synchronization. Therefore, a synchronization signal (or preamble) is currently inserted before the valid data of the downlink signal for the terminal equipment to complete the downlink signal detection and frame synchronization functions.
  • the control information of the downlink data in order to reduce the blind detection of the control information of the downlink data by the terminal equipment, can be carried in the synchronization signal, so that the terminal equipment can accurately receive the control information of the downlink data to improve the downlink data transmission efficiency.
  • the terminal device will be in an unsynchronized state when receiving the synchronization signal and needs to perform a large number of operations to obtain time synchronization.
  • the synchronization signal carries the control information of the downlink data, which will increase the complexity of the relevant operations and may lead to increased terminal device synchronization. the complexity.
  • the control information of downlink data carried by the synchronization signal occupies N bits, and the complexity of related operations of the terminal equipment may increase by 2N times.
  • embodiments of this application propose a communication method that can flexibly and accurately send and receive control information of downlink data without increasing synchronization complexity, so as to improve the transmission efficiency of downlink data.
  • Line coding is to eliminate or reduce the DC and low-frequency components in digital electrical signals to facilitate transmission, reception and monitoring in wired/wireless channels.
  • Modulation symbol sequence may refer to a sequence composed of one or more modulation symbols.
  • A represents the maximum value of the envelope of the signal
  • B represents the minimum value of the envelope of the signal.
  • Envelope ripple which represents the amplitude fluctuations Mh and Ml of the radio frequency signal envelope at high or low levels, where Mh represents the upward fluctuation in amplitude, and Ml represents the downward fluctuation in amplitude.
  • the first device receives the control information of downlink data and the second device sends the control information of downlink data as an example.
  • the operations performed by the first device can also be implemented by a processor in the first device, or a chip or chip system, or a functional module, etc.
  • the operations performed by the second device can also be implemented by a processor in the second device, a chip or a chip system, or a functional module, which is not limited in this application.
  • the first device may be a reader or a reader (Reader), and the form may be a network device or a terminal device; the second device may be a tag (Tag), and the form may be a terminal device, which is not limited in this application.
  • the embodiment of the present application provides a method for sending and receiving control information of downlink data.
  • the specific process of the method may include:
  • Step 201 The second device sends a synchronization signal to the first device, and accordingly, the first device receives the synchronization signal from the second device.
  • at least one parameter of the control information of the downlink data is related to the synchronization signal, and the at least one parameter may include a resource location of the control information of the downlink data or a first parameter of the control information of the downlink data.
  • the control information of the downlink data may be used to schedule the downlink data.
  • the function of the synchronization signal may include one or more of the following functions: automatic gain control (automatic gain control, AGC), time synchronization, frequency synchronization, data packet detection or boundary detection, etc.
  • AGC automatic gain control
  • time synchronization can be used to reduce distortion by adjusting the strength of the received signal.
  • Time synchronization can be used by obtaining correct timing or sampling timing.
  • Boundary detection can be used to detect the boundaries of the preamble sequence and/or downlink data.
  • the synchronization signal may also be called a preamble.
  • the synchronization signal may be located before the control information of the downlink data, and the control information of the downlink data may be located before the downlink data.
  • the time domain resources used for transmitting synchronization signals and the time domain resources used for transmitting control information of downlink data may be continuous or discontinuous.
  • the time domain resources used to transmit the control information of downlink data and the time domain resources used to transmit the downlink data may be continuous or discontinuous.
  • At least one parameter of the control information of the downlink data is related to the synchronization signal. It can be understood that at least one parameter of the control information of the downlink data can be determined based on the synchronization signal.
  • the resource location of the control information of the downlink data is related to the synchronization signal, which may include the following three situations:
  • the time domain position of the control information of the downlink data is determined based on the time domain position of the synchronization signal.
  • the frequency domain position of the control information of the downlink data may be preset or determined in other ways, which is not limited in this application.
  • the frequency domain position of the control information of the downlink data is determined based on the frequency domain position of the synchronization signal.
  • the time domain position of the control information of the downlink data may be preset or determined in other ways, which is not limited in this application.
  • Case a3 The time domain position of the control information of the downlink data is determined based on the time domain position of the synchronization signal, and the frequency domain position of the control information of the downlink data is determined based on the frequency domain position of the synchronization signal.
  • the time domain position based on the synchronization signal can be implemented in the following manner.
  • the domain position determines the time domain position of the control information of the downlink data:
  • Mode b1 the starting time domain position of the control information of the downlink data is adjacent to the ending time domain position of the synchronization signal, for example, as shown in FIG. 3 .
  • This method b1 can also be understood as that there is no interval between the adjacent starting time domain position of the control information of the downlink data and the adjacent ending time domain position of the synchronization signal.
  • the method b1 can also be understood as that the control information of the downlink data and the synchronization signal occupy continuous time domain resources.
  • the time domain resources occupied by the control information of downlink data are the time domain resources used by the first device to receive the control information of the downlink data, and the time domain resources used by the second device to send the control information of the downlink data.
  • the time domain resources occupied by the synchronization signal are the time domain resources used by the first device to receive the synchronization signal and the time domain resources used by the second device to send the synchronization signal.
  • Method b2 There is a first time interval between the starting time domain position of the control information of the downlink data and the ending time domain position of the synchronization signal, for example, as shown in FIG. 4 .
  • the first time interval is preset.
  • the first time interval is configured by the second device, that is, the first time interval is notified by the second device to the first device.
  • the first time interval is related to parameters of the synchronization signal, that is, the first time interval can be determined based on the synchronization signal, and the parameters of the synchronization signal can include one or more of the following: sequence, the length of the synchronization signal, the number of repetitions of the synchronization signal, or the spreading factor of the synchronization signal.
  • the first time interval is related to the parameters of the synchronization signal. Specifically, there may be a correlation between different values of the parameters of the synchronization signal and different time intervals.
  • the first time interval corresponds to some specific values of the parameters of the synchronization signal. For example, different sequences of synchronization signals, different lengths of synchronization signals, different repetition times of synchronization signals or different spreading factors of synchronization signals are associated with (correspond to) different time intervals.
  • Mode b3 The starting time domain position of the control information of the downlink data and the starting time domain position of the synchronization signal are separated by a second time interval.
  • the second time interval is preset.
  • the second time interval is configured by the second device, that is, the second time interval is notified by the second device to the first device.
  • the second time interval is related to parameters of the synchronization signal, that is, the second time interval can be determined based on the synchronization signal.
  • the parameters of the synchronization signal please refer to the description in the above method b2.
  • Method b4 There is a third time interval between the end time domain position of the control information of the downlink data and the end time domain position of the synchronization signal.
  • the third time interval is preset.
  • the third time interval is configured by the second device, that is, the third time interval is notified by the second device to the first device.
  • the third time interval is related to parameters of the synchronization signal, that is, the third time interval can be determined based on the synchronization signal.
  • the parameters of the synchronization signal please refer to the description in the above method b2.
  • the frequency domain position based on the synchronization signal can be implemented in the following manner.
  • the domain position determines the frequency domain position of the control information of the downlink data:
  • Method c1 The center frequency point of the frequency domain resource of the control information of the downlink data is the same as the center frequency point of the frequency domain resource of the synchronization signal, and the bandwidth of the control information of the downlink data is the same as the bandwidth of the synchronization signal. are different, as shown in Figure 5.
  • the frequency domain resources of the control information of downlink data are the frequency domain resources of the first device to receive the control information of the downlink data, and the frequency domain resources of the second device to send the control information of the downlink data.
  • the frequency domain resources of the synchronization signal are the frequency domain resources for the first device to receive the synchronization signal, and the frequency domain resources for the second device to send the synchronization signal.
  • Mode c2 the frequency domain resources of the control information of the downlink data are the same as the frequency domain resources of the synchronization signal, for example, as shown in FIG. 6 .
  • This method c2 can also be understood as the center frequency point of the frequency domain resource of the control information of the downlink data is the same as the center frequency point of the frequency domain resource of the synchronization signal, and the bandwidth of the control information of the downlink data is the same as the center frequency point of the frequency domain resource of the synchronization signal.
  • the bandwidth of the sync signal is the same.
  • Mode c3 The starting frequency domain position of the control information of the downlink data and the ending frequency domain position of the synchronization signal are separated by a first frequency domain interval.
  • the first frequency domain interval may be preset.
  • the first frequency domain interval may be configured by the second device, that is, the first frequency domain interval is notified by the second device to the first device.
  • the first frequency domain interval is related to parameters of the synchronization signal, that is, the first frequency domain interval can be determined based on the synchronization signal.
  • the first frequency domain interval is related to the parameters of the synchronization signal. Specifically, there may be a correlation between different values of the parameters of the synchronization signal and different frequency domain intervals.
  • the first frequency domain interval corresponds to some specific parameters of the synchronization signal. Take value. For example, different sequences of synchronization signals, different lengths of synchronization signals, different repetition times of synchronization signals or different spreading factors of synchronization signals are associated with (correspond to) different frequency domain intervals.
  • the first frequency domain interval may be 0.
  • the frequency domain resources of the control information of the downlink data and the frequency domain resources of the synchronization signal are continuous, or adjacent. of.
  • Mode c4 The starting frequency domain position of the control information of the downlink data and the starting frequency domain position of the synchronization signal are separated by a second frequency domain interval, for example, as shown in FIG. 7 .
  • the second frequency domain interval may be preset.
  • the second frequency domain interval may be configured for the second device, that is, the second frequency domain interval is notified by the second device to the first device.
  • the second frequency domain interval is related to parameters of the synchronization signal, that is, the second frequency domain interval can be determined based on the synchronization signal.
  • Mode c5 There is a third frequency domain interval between the end frequency domain position of the control information of the downlink data and the end frequency domain position of the synchronization signal.
  • the third frequency domain interval may be preset.
  • the third frequency domain interval may be configured by the second device, that is, the third frequency domain interval is notified by the second device to the first device.
  • the third frequency domain interval is related to parameters of the synchronization signal, that is, the third frequency domain interval can be determined based on the synchronization signal.
  • the number of bits of the control information of the downlink data may be less than X, the control information of the downlink data does not use a cyclic redundancy check (CRC), and X may be positive integer.
  • CRC cyclic redundancy check
  • the downlink data may use CRC.
  • X can be a positive integer less than or equal to 12, for example, X can be 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 etc.
  • control information of the downlink data may use CRC, and the downlink data may also use CRC.
  • the number of bits corresponding to the CRC used in the control information of the downlink data is L1.
  • the number of bits corresponding to the CRC used in the data is L2.
  • the L1 and the L2 may be different positive integers, or they may be the same positive integer.
  • L1 is 6 and L2 is 16 or 24, that is, the number of bits corresponding to the CRC used in the control information of the downlink data is 6, and the number of bits corresponding to the CRC used in the downlink data is 16. This allows subsequent CRC polynomials to reuse the current CRC polynomial, making implementation simple.
  • the L1 may be determined based on the number of bits of the control information of the downlink data. For example, when the number of bits of the control information of the downlink data is less than or equal to the first value, the L1 may be 6, etc.; when the number of bits of the control information of the downlink data is greater than the first value, the L1 L1 can be 11 etc. Optionally, in this case, the number of bits corresponding to the CRC used in the downlink data may be 16, etc.
  • the number of bits corresponding to the control information of the downlink data or the CRC used in the downlink data is a certain value, it can correspond to the same CRC generating polynomial.
  • control information of the downlink data and the downlink data may support channel coding, and the control information of the downlink data and the channel coding type supported by the downlink data are the same.
  • both the control information of the downlink data and the downlink data may use polar codes.
  • control information of the downlink data may adopt a block code.
  • the number of bits to be encoded for the control information of the downlink data can be recorded as K
  • the bit sequence to be encoded for the control information of the downlink data can be recorded as c 0 , c 1 , c 2 , c 3 ,..., c K-1
  • the bit sequence after encoding the control information can be recorded as d 0 , d 1 , d 2 , d 3 ,..., d N-1 , where N is the number of bits after encoding the control information of the downlink data.
  • the bit sequence to be encoded for the control information of the downlink data is c 0
  • N the bit sequence after encoding the control information of the downlink data
  • the bit sequence to be encoded for the control information of the downlink data is c 0
  • the bit sequence to be encoded for the control information of the downlink data is c 0 , c 1 .
  • x is a placeholder, whose main function is to maximize the Euclidean distance of the modulation symbols carrying information bits.
  • control information of the downlink data When the control information of the downlink data supports channel coding, the control information of the downlink data may include a field used to indicate the transport block size of the downlink data or a field used to indicate the code block size of the downlink data.
  • the first parameter of the control information of the downlink data is related to the synchronization signal. It can be understood that the first parameter of the control information of the downlink data can be determined based on the synchronization signal. Specifically, the first parameter of the control information of the downlink data may be determined based on the parameters of the synchronization signal. For example, one or more of the sequence of the synchronization signal, the length of the synchronization signal, the number of repetitions of the synchronization signal or the spreading factor of the synchronization signal has a corresponding relationship with the first parameter of the control information of the downlink data. One or more of different sequences of synchronization signals, different lengths of synchronization signals, different repetition times of synchronization signals or different spreading factors of synchronization signals may correspond to different values of the first parameter of the control information of downlink data.
  • the first parameter of the control information of the downlink data may include one or more of the following: the bandwidth of the control information of the downlink data, the subcarrier spacing of the control information of the downlink data, the The cyclic prefix (CP) type of the control information, the line code parameters of the control information of the downlink data, the channel coding parameters of the control information of the downlink data, the modulation method of the control information of the downlink data, the The number of repetitions of the control information of the downlink data, the spreading factor of the control information of the downlink data, the data rate of the control information of the downlink data, the time length of the control information of the downlink data, the control of the downlink data The modulation depth of the information or the duty cycle of the control information of the downlink data.
  • CP cyclic prefix
  • Table 4 shows an example of the correspondence between the first parameter of the control information of downlink data and the synchronization sequence.
  • the synchronization signal is sequence 2, that is, [W, W'], where W is similar to the previous description and will not be repeated.
  • the bandwidth of the control information of downlink data is 1 RB.
  • the control information of downlink data adopts Manchester encoding.
  • the control information of downlink data adopts polar code.
  • the code rate of polar code is 1/4.
  • the control information of downlink data adopts OOK modulation method.
  • the number of repetitions of the control information of downlink data is 8.
  • the synchronization signal is sequence 3, that is, [W'W W'W], where W is similar to the previous description and will not be repeated.
  • the bandwidth of the control information of downlink data is 1 RB.
  • the control information of downlink data adopts Manchester encoding.
  • the control information of downlink data adopts polar code.
  • the code rate of polar code is 1/4.
  • the control information of downlink data adopts OOK modulation method.
  • the number of repetitions of the control information of downlink data is
  • a sequence of synchronization signals corresponds to the first parameter of the control information of a group of downlink data.
  • a sequence of synchronization signals can also correspond to the control information of multiple groups of downlink data.
  • the first parameter after subsequently receiving the synchronization signal, the first device can perform blind detection according to the first parameters of the control information of multiple sets of downlink data, and receive the control information of the downlink data sent by the second device.
  • the coverage level of the synchronization signal corresponds to the parameters of the synchronization signal.
  • different sequences of the synchronization signal, different lengths of the synchronization signal, different repetition times of the synchronization signal, or different spreading factors of the synchronization signal may correspond to different coverage levels of the synchronization signal.
  • the coverage level can also be replaced by other descriptions such as repetition level, coverage enhancement level or enhanced coverage level. This application only takes the coverage level as an example for explanation.
  • FIG. 8 shows a schematic diagram of the correlation between synchronization signals of different repetition levels and control information of downlink data.
  • control information of the downlink data may include one or more of the following: the bandwidth of the downlink data, the frequency domain resource location of the downlink data, the time resource location of the downlink data, the downlink data subcarrier spacing, the CP type of the downlink data, the line code parameters of the downlink data, the channel coding parameters of the downlink data, the modulation mode of the downlink data, the number of repetitions of the downlink data, the downlink data
  • the spreading factor of the data the data rate of the downlink data, the time length of the downlink data, the modulation depth of the downlink data, the duty cycle of the downlink data, the number of time units occupied by the downlink data, or A redundant version of the downlink data.
  • the value range of the second parameter in the control information of the downlink data is related to the parameters of the synchronization signal, that is, the value range of the second parameter in the control information of the downlink data
  • the range is determined based on parameters of the synchronization signal.
  • the second parameter in the control information of the downlink data may include one or more of the following: the number of repetitions of the downlink data, the modulation mode of the downlink data, the channel coding parameter of the downlink data, or the Line code parameters of downlink data, etc.
  • the above second parameter can be understood as a control parameter or as a coverage related parameter.
  • the value range can also be exemplified as a value set, etc.
  • the second parameter is the number of repetitions of downlink data.
  • the synchronization signal has coverage level 0, coverage level 1 and coverage level 2.
  • a coverage level the value set of the number of repetitions of downlink data can be determined according to the coverage level of the synchronization signal.
  • the coverage level of the synchronization signal is coverage level 0 and the value set of the number of repetitions of the downlink data indicated in the control information of the downlink data may be ⁇ 1, 2, 4, 8 ⁇ .
  • the coverage level of the synchronization signal is coverage level 1, and the value set of the number of repetitions of the downlink data indicated in the control information of the downlink data may be ⁇ 4, 8, 16, 32 ⁇ .
  • the coverage level of the synchronization signal is coverage level 2, and the value set of the number of repetitions of the downlink data indicated in the control information of the downlink data may be ⁇ 16, 32, 64, 128 ⁇ .
  • the value set of the number of repetitions of the downlink data follows the scheme of ⁇ 1, 2, 4, 8, 16, 32, 64, 128 ⁇ , and the control information of the downlink data indicates the downlink data
  • the number of repetitions requires 3 bits.
  • the set of values for the number of repetitions of downlink data can be determined based on the synchronization signal.
  • the control information of the downlink data indicating the number of repetitions of the downlink data only requires 2 bits, which can reduce the number of times the control information of the downlink data indicates the repetition of the downlink data. signaling overhead.
  • the modulation mode of the downlink data and the channel coding parameter of the downlink data may be jointly indicated.
  • the control information of the downlink data may indicate the modulation mode of the downlink data and the downlink data through a first index.
  • the first index may be a modulation and coding scheme (modulation and coding scheme, MCS) index.
  • control information of the downlink data may also include first indication information and/or second indication information; the first indication information may be used to indicate whether channel coding is enabled for the downlink data. ; The second indication information may be used to indicate whether the downlink data has a terminator.
  • the control information of the downlink data when the control information of the downlink data indicates that the downlink data enables channel coding, the control information of the downlink data may include determining the MCS of the downlink data or the channel coding of the downlink data. Parameter information (domain, field, etc.); when the control information of the downlink data indicates that the downlink data does not enable channel coding, the control information of the downlink data may include a parameter used to determine the number of repetitions of the downlink data. Information (domains, fields, etc.).
  • the information used to determine the MCS of the downlink data or the channel coding parameter of the downlink data and the information used to determine the number of repetitions of the downlink data may occupy the same bits.
  • the same bits can be called the first field.
  • the first indication information may include 1 bit, and different values of the 1 bit indicate whether channel coding is enabled for the downlink data. For example, when the value of 1 bit included in the first indication information is 1, it may indicate that channel coding is enabled for the downlink data; when the value of 1 bit included in the first indication information is 0, It may mean that channel coding is not enabled for the downlink data.
  • Table 5 below shows specific examples of the first indication information and the first field in the control information of downlink data.
  • the control information of the downlink data may include a field for indicating the transport block size of the downlink data or a field for indicating the size of the downlink data.
  • the output block size or code block size may occupy the same bits as the MCS of the downlink data or the number of repetitions of the downlink data.
  • the same bits can be called the second field.
  • the second indication information may include 1 bit, and different values of the 1 bit indicate whether the downlink data has a terminator. For example, when the value of 1 bit included in the second indication information is 1, it may indicate that the downlink data has no terminator, and when the value of 1 bit included in the first indication information is 0, It can indicate that the downlink data has a terminator.
  • Table 6 below shows specific examples of the second indication information and the second field in the control information of downlink data.
  • the first field and the second field may be the same bits or different bits, which is not limited in this application.
  • Step 202 The second device sends the control information of the downlink data to the first device according to the at least one parameter of the control information of the downlink data.
  • the first device receives the control information of the downlink data from the second device according to the at least one parameter of the control information of the downlink data.
  • the second device first determines the at least one parameter of the control information of the downlink data based on the synchronization signal, and then provides the at least one parameter to the control information of the downlink data based on the at least one parameter of the control information of the downlink data.
  • the first device sends the control information of the downlink data.
  • the first device may determine the at least one parameter of the control information of the downlink data based on the synchronization signal, and then obtain the information from the second device based on the at least one parameter of the control information of the downlink data. Receive control information of the downlink data.
  • control information of downlink data can be carried through the physical downlink control channel (PDCCH), or can also be carried through other information or signaling, which is not limited in this application.
  • PDCCH physical downlink control channel
  • Step 203 The second device sends the downlink data to the first device according to the control information of the downlink data.
  • the first device receives the downlink data from the second device according to the control information of the downlink data.
  • the downlink data may be carried through a physical downlink shared channel (PDSCH) or PDCCH.
  • the downlink data may be application layer data and/or control signaling.
  • the control signaling may be one of radio resource control (RRC) signaling, media access control control element (MAC CE), and MAC protocol data unit (PDU) or more.
  • RRC radio resource control
  • MAC CE media access control control element
  • PDU MAC protocol data unit
  • the second device if the second device determines that the coverage level of the synchronization signal corresponding to the downlink data after the downlink data needs to be updated, the second device sends the first information to the first device.
  • the first information is used to indicate the coverage level of the synchronization signal corresponding to the downlink data after the downlink data.
  • the first device receives the first information from the second device, so that the first device can determine the coverage level of the synchronization signal corresponding to the downlink data after the downlink data based on the first information.
  • the reader sends a continuous high-level waveform to the passive tag (Tag). After receiving the energy, the tag reflects the information to the receiver (Receiver) through the reverse link.
  • RFID radio frequency identification
  • Select the labeling process The reader first sends Select signaling, which is used to select a specific tag/tag group for inventory and access.
  • the parameters of the selected signaling may include Target, Action, Membank, Pointer, Length, Mask and Truncate.
  • the specific meaning of each parameter can be shown in Table 7 below:
  • the tag receives the query (Query) signaling from the reader.
  • the parameters of the query signaling include Q.
  • the tags to be inventoried select a random number from the range of (0,2 Q -1) and load it into their time slot. In the counter, the tag with a non-0 value selected at this time moves to the arbitration state, and the tag with a 0 value selected enters the response state and responds with an RN16. Then the reader/writer responds with an acknowledgment character (ACK) command containing the same RN16.
  • Confirm label The confirmed tag moves to the confirmed state and responds to its program counter (PC), electronic product code (EPC) and CRC-16, completing the tag's basic information inventory process.
  • PC program counter
  • EPC electronic product code
  • CRC-16 Cost labeling process.
  • QueryRep signaling repeats the previous query operation without changing any parameters. For tags in the arbitration state, each time a QueryRep signaling is received, the value in their slot counter is decremented by 1. At this time, the tag in the slot counter is reduced to 0. Repeat the same response process as above.
  • QueryAdjust signaling repeats the previous query operation and can increase or decrease Q. In addition, if the tag in the arbitration state receives a QueryAdjust signaling, it adjusts the Q value, and then re-selects a random number in the range of (0, 2 Q -1) to load into their time slot counter. Tags with a non-zero value are transferred to the arbitration state, and tags with a 0 value are selected to enter the response state.
  • the second device determines that the coverage level of the synchronization signal corresponding to the downlink data after the downlink data needs to be updated by the following method: if the second device detects a conflict when receiving RN16, or the second device If the second device does not receive RN16 within a certain period of time, it can be determined that the coverage level of the synchronization signal corresponding to the downlink data after the downlink data needs to be updated.
  • the second device when the second device sends the first information to the first device, the second device may reuse QueryRep signaling, or a new downlink signaling (the name is not limited), or downlink control information ( downlink control information (DCI) to notify the first device of the coverage level of the synchronization signal corresponding to subsequent downlink data.
  • QueryRep signaling or a new downlink signaling (the name is not limited), or downlink control information ( downlink control information (DCI) to notify the first device of the coverage level of the synchronization signal corresponding to subsequent downlink data.
  • DCI downlink control information
  • the above updating coverage level may also be called coverage level switching.
  • coverage level switching For example, based on the above method, a schematic diagram of coverage level switching can be shown in Figure 10.
  • a possible implementation method is that for at least one of the downlink data, the control information of the downlink data, and the synchronization signal, the modulation method can be on-off keying (OOK), Multicarrier on-off keying (MC-OOK), double-sideband amplitude-shift keying (DSB-ASK), single-sideband amplitude-shift keying (single-sideband amplitude-shift keying) shift keying (SSB-ASK), phase-reversal amplitude shift keying (PR-ASK), multiple amplitude-shift keying (MASK), frequency-shift keying (frequency- shift keying (FSK), Gaussian frequency shift keying (GFSK), multiple frequency-shift keying (MFSK), binary phase shift keying (BPSK), four Phase shift keying (quadrature phase shift keying, QPSK), pulse amplitude modulation (pulse amplitude modulation, PAM), pulse width modulation (pulse-width modulation, PWM), pulse position
  • OOK on-off key
  • the first device can determine whether there is a downlink control channel after the synchronization signal through the synchronization signal, where the downlink control channel can be used to carry control information of downlink data.
  • the first device obtains first configuration information from the second device, and the first configuration information indicates whether there is a downlink control channel after the synchronization signal, where the downlink control channel can be used to carry control information of downlink data.
  • the first device can send capability information to the second device, and accordingly, the second device can receive capability information from the first device, where the capability information includes at least the following: One item: whether the first device supports the downlink control channel, whether the first device supports channel coding, the type of channel coding supported by the first device, whether the first device supports line codes, the type of line codes supported by the first device, whether the first device supports Supports hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback.
  • HARQ-ACK hybrid automatic repeat request acknowledgment
  • Whether the first device supports channel coding may specifically refer to whether the first device supports channel coding for downlink.
  • the channel coding type supported by the first device may specifically be, for downlink, the channel coding type supported by the first device. type.
  • Whether the first device supports line codes may specifically refer to whether the first device supports line codes for downlink.
  • the line code type supported by the first device may specifically be the line code type supported by the first device for downlink.
  • Whether the first device supports HARQ-ACK feedback specifically, whether the first device supports HARQ-ACK feedback for downlink.
  • the downlink may be a downlink control channel and/or a downlink data channel. It should be noted that, among the above capability information, multiple capability information can be associated. For the associated multiple capability information, the first device only needs to report one type of capability information among the multiple associated capability information. In this way, the overhead of reporting capability information by the first device can be saved. As an example, whether the first device supports channel coding and whether the first device supports downlink control channels can be related.
  • the first device reports capability information, and the content of the capability information is that the first device supports channel coding, it means that the first device also supports downlink. control channel.
  • the first device reports capability information.
  • the content of the capability information is that the first device does not support channel coding, which means that the first device does not support the downlink control channel either.
  • whether the first device supports HARQ-ACK feedback and whether the first device supports a control channel may be associated.
  • the first device reports capability information, and the content of the capability information is that the first device supports HARQ-ACK feedback, it means that the first device also supports the downlink control channel.
  • the first device reports capability information.
  • the content of the capability information is that the first device does not support HARQ-ACK feedback, which means that the first device does not support the downlink control channel either.
  • the first device can send capability information to the second device, and accordingly, the second device can receive capability information from the first device, where the capability information includes at least the following: One item: the first device supports the downlink control channel, the first device supports channel coding, the first device supports the channel coding type, the first device supports the line code, the first device supports the line code type, the first device supports HARQ-ACK feedback.
  • the first device supports channel coding. Specifically, for downlink, the first device supports channel coding.
  • the channel coding type supported by the first device may specifically be the channel coding type supported by the first device for downlink.
  • the first device supports the line code. Specifically, for downlink, the first device supports the line code.
  • the line code type supported by the first device may specifically be the line code type supported by the first device for downlink.
  • the first device supports HARQ-ACK feedback. Specifically, for downlink, the first device supports HARQ-ACK feedback.
  • the downlink may be a downlink control channel and/or a downlink data channel. If the first device does not send capability information to the second device, the capability information indicates that the first device supports the downlink control channel, or if the second device does not receive capability information from the first device, the capability information indicates that the first device supports downlink control channel, it means that the first device does not support the downlink control channel.
  • the capability information is that the first device supports channel coding, or if the second device does not receive capability information from the first device, the capability information is that the first device supports channel coding encoding, it means that the first device does not support channel encoding. If the first device does not send capability information to the second device, the capability information is the line code supported by the first device, or if the second device does not receive capability information from the first device, the capability information is the line code supported by the first device. code, it means that the first device does not support line codes.
  • the capability information indicates that the first device supports HARQ-ACK feedback
  • the capability information indicates that the first device supports HARQ-ACK feedback.
  • Supporting HARQ-ACK feedback means that the first device does not support HARQ-ACK feedback.
  • multiple capability information can be associated.
  • the first device only needs to report one capability information among the multiple capability information associated. In this way, This can save the overhead of the first device reporting capability information.
  • the first device supports channel coding and the first device supports downlink control channels can be associated.
  • the first device reports capability information, and the content of the capability information is that the first device supports channel coding, it means that the first device also supports downlink control channels. .
  • the first device supporting HARQ-ACK feedback and the first device supporting the control channel may be associated. For example, if the first device reports capability information, and the content of the capability information is that the first device supports HARQ-ACK feedback, it means that the first device also supports the downlink control channel.
  • a possible implementation manner is that the second device can send the second configuration information to the first device, and accordingly, the first device can receive the second configuration information from the second device.
  • the configuration information includes at least one of the following configuration information: whether to enable the downlink control channel, whether to enable channel coding, enabled channel coding type, whether to enable line code, enabled line code type, whether Enable HARQ-ACK feedback. It should be understood that "enable” here can also be expressed as "activate”. Whether channel coding is enabled may specifically refer to whether the second device enables channel coding for downlink.
  • the enabled channel coding type may specifically be the channel coding type enabled by the second device for downlink.
  • Whether to enable the line code may specifically refer to whether the second device enables the line code for downlink.
  • the enabled line code type may specifically be the line code type enabled by the second device for downlink.
  • Whether to enable HARQ-ACK feedback may specifically refer to whether the second device enables HARQ-ACK feedback for downlink.
  • the downlink may be a downlink control channel and/or a downlink data channel. It should be noted that the above multiple configuration information can be associated. For the associated multiple configuration information, the second device only needs to send one configuration information among the associated multiple configuration information. In this way, the cost of sending the second configuration information by the second device can be saved. As an example, whether channel coding is enabled and whether the downlink control channel is enabled can be related.
  • the second device sends second configuration information, and the second configuration information includes the content of enabling channel coding, which means that the second device also enables downlink. control channel.
  • the second device sends the second configuration information. If the content of the second configuration information is to disable channel coding, it means that the second device also does not enable channel coding. Downlink control channel.
  • whether the second device enables HARQ-ACK feedback and whether the second device enables the control channel may be associated. For example, if the second device sends the second configuration information, and the content of the second configuration information is to enable HARQ-ACK feedback, it means that the second device also enables the downlink control channel.
  • the second device sends second configuration information. The content of the second configuration information is to disable HARQ-ACK feedback, which means that the second device also disables the downlink control channel.
  • a possible implementation manner is that the second device can send the second configuration information to the first device, and accordingly, the first device can receive the second configuration information from the second device.
  • the configuration information includes at least one of the following: enabling downlink control channel, enabling channel coding, enabled channel coding type, enabling line code, enabled line code type, and enabling HARQ-ACK feedback. It should be understood that "enable” here can also be expressed as "activate”.
  • Enabling channel coding may specifically enable the second device to enable channel coding for downlink.
  • the enabled channel coding type may specifically be the channel coding type enabled by the second device for downlink.
  • Enabling the line code may specifically enable the second device to enable the line code for downlink.
  • the enabled line code type may specifically be the line code type enabled by the second device for downlink.
  • Enabling HARQ-ACK feedback may specifically enable the second device to enable HARQ-ACK feedback for downlink.
  • the downlink may be a downlink control channel and/or a downlink data channel. If the second device does not send the second configuration information to the first device, the second configuration information is to enable the downlink control channel, or if the first device does not receive the second configuration information from the second device, the second configuration information If the information is to enable the downlink control channel, it means that the second device does not enable the downlink control channel.
  • the second configuration information is to enable channel coding, or if the first device does not receive the second configuration information from the second device, the second configuration information If channel coding is enabled, it means that the second device does not enable channel coding. If the second device does not send the second configuration information to the first device, the second configuration information is the enabled line code, or if the first device does not receive the second configuration information from the second device, the second configuration information If the line code is enabled, it means that the second device does not have the line code enabled.
  • the second configuration information is to enable HARQ-ACK feedback, or if the first device does not receive the second configuration information from the second device, the second configuration information is enabled. If the configuration information is to enable HARQ-ACK feedback, it means that the second device does not enable HARQ-ACK feedback. It should be noted that the above multiple configuration information can be associated. For the associated multiple configuration information, the second device only needs to send one configuration information among the associated multiple configuration information. In this way, the cost of sending the second configuration information by the second device can be saved. In one example, enabling channel coding and enabling downlink control channels can be associated.
  • the second device sends second configuration information, and the content of the second configuration information is enabling channel coding, which means that the second device also enables downlink control channels.
  • the second device enables HARQ-ACK feedback and the second device enables control channel may be associated. For example, if the second device sends the second configuration information, and the content of the second configuration information is to enable HARQ-ACK feedback, it means that the second device also enables the downlink control channel.
  • a possible implementation manner is that the first device sends capability information to the second device. Accordingly, the second device receives the capability information from the first device. That is to say, the first device can report capability information to the second device.
  • the capability information may include one or more of the following: whether the first device supports energy harvesting, whether the first device supports a low-power receiver, or whether the first device supports backscatter communication.
  • the first device supporting energy collection may mean that the first device supports autonomously acquiring energy from the environment, and the source of the energy may be at least one of the following: light, radio waves, temperature differences, Vibrations, motion, salinity gradients, wind or water flows.
  • the first device converts energy obtained from the environment into electrical energy.
  • the advantage of energy collection is that it can replace the battery to power the device or supplement the battery energy, thereby extending the service life of the device.
  • the energy generated through energy collection can be provided to the signal processing or data storage circuit of the first device to maintain the normal operation of the first device. working status.
  • the first device supporting a low-power receiver may mean that the first device supports receiving signals in a non-coherent reception manner.
  • Low-power receivers can avoid using RF modules with large power consumption, such as high-linearity mixers, voltage-controlled oscillators that can provide accurate local oscillator signals, etc. Therefore, low-power receivers can achieve lower power consumption. consumption level.
  • the non-coherent receiving method can be envelope detection, differential demodulation, etc.
  • the signal may be a signal from the second device.
  • the first device supporting a low-power receiver may mean that the first device only has a low-power receiver, or the first device has both a low-power receiver and a traditional receiver. Traditional receivers are different from low-power receivers.
  • the receiver architecture of traditional receivers can be superheterodyne, zero-IF or low-IF, and traditional receivers can support coherent reception.
  • Traditional receivers need to use some high-performance and high-precision module circuits to ensure receiver performance, such as high-gain and high-linearity low-noise amplifiers, high-linearity mixers, and voltage-controlled oscillators that can provide accurate local oscillator signals. etc., these module circuits have higher power consumption, so within a certain period of time, the power consumption of traditional receivers is higher than that of low-power receivers.
  • the first device that has both a traditional receiver and a low-power receiver, you can achieve energy saving by turning off the traditional receiver and turning on the low-power receiver.
  • the first device can receive a wake-up signal through a low-power receiver, and trigger the start-up of the traditional receiver through the wake-up signal.
  • the wake-up signal may be sent by the second device.
  • envelope detection can refer to a signal detection method that obtains the envelope or amplitude line of the low-frequency original signal after half-wave or full-wave rectification of a high-frequency or intermediate-frequency input signal.
  • the first device can obtain the original signal after receiving the signal in a manner including detection envelope.
  • the first device can digitally sample the envelope of the original signal and compare it with the amplitude or energy threshold set by the first device to determine whether the received signal is 1 or 0.
  • the first device can also determine whether the received signal is 1 or 0 based on other implementation methods, which is not specifically limited in this embodiment of the present application.
  • the first device supports backscatter communication, which may mean that the first device supports transmitting information to the second device without an actively transmitting radio frequency link; or, the first device supports transmitting information to the second device when it has an actively transmitting radio frequency link. Passes information to the second device without the link being open. That is to say, the first device mainly relies on an excitation device other than the second device or a continuous carrier wave transmitted by the second device for modulation.
  • the first device can reflect part or all of the incident carrier waves by adjusting the impedance of the antenna of the first device; or the first device can also adjust the impedance of the antenna of the first device so as not to reflect the incident carrier waves, or Absorbs the energy of the incident carrier wave. In this way, by adjusting the impedance of the antenna of the first device, the first device can modulate the digital information of the first device onto the incident carrier wave and transmit it to the second device.
  • the maximum bandwidth supported by the first device is limited.
  • the maximum uplink bandwidth supported by the first device does not exceed X1.
  • X1 is 20MHz, or X1 is 5MHz, or X1 is 3MHz, or X1 is 1.4MHz, or X1 is 1MHz, or X1 is 720kHz, or X1 is 540kHz, or X1 is 360kHz, or X1 is 180kHz.
  • X1 is K1 resource blocks, and K1 is a positive integer.
  • K1 is a positive integer less than or equal to 11, or K1 is a positive integer less than or equal to 25, or K1 is a positive integer less than or equal to 51, or K1 is a positive integer less than or equal to 106.
  • the maximum downlink bandwidth supported by the first device does not exceed Y1.
  • Y1 is 20MHz, or Y1 is 5MHz, or Y1 is 3MHz, or Y1 is 1.4MHz, or Y1 is 1MHz, or Y1 is 720kHz, or Y1 is 540kHz, or Y1 is 360kHz, or Y1 is 180kHz.
  • Y1 is K2 resource blocks, and K2 is a positive integer.
  • K2 is a positive integer less than or equal to 11, or K2 is a positive integer less than or equal to 25, or K2 is a positive integer less than or equal to 51, or K2 is a positive integer less than or equal to 106.
  • the maximum uplink bandwidth supported by the first device is less than or equal to the maximum downlink bandwidth supported by the first device.
  • the first device supports a limited number of transmitting and/or receiving antennas.
  • the number of receiving antennas of the first device does not exceed X2.
  • X2 is 1, or 2, or 4.
  • the number of receiving branches (Rx branches) of the first device does not exceed X2, where X2 is 1, or 2, or 4.
  • the number of transmitting antennas of the first device does not exceed Y2.
  • Y2 is 1, or 2, or 4.
  • the number of sending branches of the first device does not exceed Y2.
  • Y2 is 1, or 2, or 4.
  • the number of transmitting antennas of the first device is greater than or equal to the number of receiving antennas of the second device.
  • the number of sending branches of the first device is greater than or equal to the number of receiving branches of the first device.
  • the "receiving branch” may also be called “the number of received radio frequency channels” or “the number of received radio frequency chains (RF chains)”.
  • “Sending branches” can also be called “number of RF channels sent”, or “number of RF chains sent”.
  • the first device cannot transmit and receive at the same time on the serving cell with paired spectrum.
  • the communication device 1100 may include a transceiver unit 1101 and a processing unit 1102 .
  • the transceiver unit 1101 is used for the communication device 1100 to communicate, such as receiving information, signals or data, or sending information, signals or data, and the processing unit 1102 is used to control the actions of the communication device 1100 manage.
  • the processing unit 1102 can also control the steps performed by the transceiver unit 1101.
  • the communication device 1100 may be a device for receiving control information of downlink data, such as the first device in the above embodiment, the processor of the first device, or a chip, or a chip system, or a function Modules etc.
  • the communication device 1100 may specifically be a device for sending downlink data control information, such as the second device in the above embodiment, the processor of the second device, or a chip, or a chip system, or a functional module, etc. .
  • the transceiver unit 1101 may be used to receive at least one of the synchronization signal and the control information of the downlink data from the second device.
  • Parameters are related to the synchronization signal, and the at least one parameter includes a resource location of the control information of the downlink data or a first parameter of the control information of the downlink data, and the control information of the downlink data is used to schedule the Downlink data; and, according to the at least one parameter of the control information of the downlink data, the The second device receives the control information of the downlink data; and, receives the downlink data from the second device according to the control information of the downlink data.
  • the processing unit 1102 can control the above-mentioned receiving operation of the transceiver unit 1101.
  • the synchronization signal includes one or more of the following functions: automatic gain control AGC, time synchronization, frequency synchronization, data packet detection or boundary detection.
  • the synchronization signal is located before the control information of the downlink data, and the control information of the downlink data is located before the downlink data.
  • the resource location of the control information of the downlink data is related to the synchronization signal, including: the time domain location of the control information of the downlink data is determined based on the time domain location of the synchronization signal. , and/or, the frequency domain position of the control information of the downlink data is determined based on the frequency domain position of the synchronization signal.
  • the starting time domain position of the control information of the downlink data is adjacent to the ending time domain position of the synchronization signal; or, the starting time domain position of the control information of the downlink data is adjacent to the ending time domain position of the synchronization signal.
  • the parameters of the synchronization signal are related, and the parameters of the synchronization signal include one or more of the following: the sequence of the synchronization signal, the length of the synchronization signal, the number of repetitions of the synchronization signal, or the expansion of the synchronization signal. frequency factor.
  • the center frequency point of the frequency domain resource of the control information of the downlink data is the same as the center frequency point of the frequency domain resource of the synchronization signal
  • the bandwidth of the control information of the downlink data is the same as the center frequency point of the frequency domain resource of the synchronization signal.
  • the bandwidths are different; or the frequency domain resources of the control information of the downlink data are the same as the frequency domain resources of the synchronization signal; or the starting frequency domain position of the control information of the downlink data is the same as the end of the synchronization signal.
  • the parameters of the synchronization signal include one or more of the following: the sequence of the synchronization signal, the length of the synchronization signal, the number of repetitions of the synchronization signal, or the number of repetitions of the synchronization signal. Spreading factor.
  • the number of bits of the control information of the downlink data is less than X
  • the control information of the downlink data does not use cyclic redundancy check code CRC
  • the downlink data uses CRC
  • X is positive Integer
  • the control information of the downlink data uses CRC
  • the downlink data uses CRC
  • the number of bits corresponding to the CRC used by the control information of the downlink data is L1
  • the number of bits corresponding to the CRC used by the downlink data is L2
  • the L1 and the L2 are different positive integers.
  • the L1 is 6 and the L2 is 16.
  • the L1 is determined based on the number of bits of the control information of the downlink data.
  • the L1 is determined based on the number of bits of the control information of the downlink data, including: when the number of bits of the control information of the downlink data is less than or equal to the first value, the L1 is 6; when the When the number of bits of the control information of the downlink data is greater than the first value, the L1 is 11.
  • control information of the downlink data and the downlink data support channel coding, and the control information of the downlink data and the channel coding type supported by the downlink data are the same.
  • control information of the downlink data includes a field used to indicate the transport block size of the downlink data or a field used to indicate the code block size of the downlink data.
  • the first parameter of the control information of the downlink data is related to the synchronization signal, including: the first parameter of the control information of the downlink data is determined based on the parameters of the synchronization signal;
  • the parameters of the synchronization signal include one or more of the following: a sequence of the synchronization signal, a length of the synchronization signal, a repetition number of the synchronization signal, or a spreading factor of the synchronization signal.
  • the first parameter of the control information of the downlink data includes one or more of the following: the bandwidth of the control information of the downlink data, the subcarrier spacing of the control information of the downlink data, the The cyclic prefix CP type of the control information, the line code parameters of the control information of the downlink data, the channel coding parameters of the control information of the downlink data, the modulation mode of the control information of the downlink data, the control information of the downlink data The number of repetitions, the spreading factor of the control information of the downlink data, the data rate of the control information of the downlink data, the time length of the control information of the downlink data, the modulation depth of the control information of the downlink data or the The duty cycle of the control information of the downlink data.
  • the coverage level of the synchronization signal corresponds to the parameters of the synchronization signal
  • the parameters of the synchronization signal include one or more of the following: the sequence of the synchronization signal, the length of the synchronization signal, the The number of repetitions of the synchronization signal or the spreading factor of the synchronization signal.
  • the control information of the downlink data includes one or more of the following: the bandwidth of the downlink data, the frequency domain resource location of the downlink data, the time resource location of the downlink data, the The subcarrier spacing of downlink data, the CP type, the line code parameters of the downlink data, the channel coding parameters of the downlink data, the modulation mode of the downlink data, the number of repetitions of the downlink data, the spreading factor of the downlink data, the downlink data The data rate, the time length of the downlink data, the modulation depth of the downlink data, the duty cycle of the downlink data, the number of occupied time units of the downlink data or the redundant version of the downlink data.
  • the value range of the second parameter in the control information of the downlink data is related to the parameters of the synchronization signal;
  • the parameters of the synchronization signal include one or more of the following: the sequence of the synchronization signal, the The length of the synchronization signal, the number of repetitions of the synchronization signal, or the spreading factor of the synchronization signal;
  • the second parameter in the control information of the downlink data includes one or more of the following: the number of repetitions of the downlink data, The modulation mode of the downlink data, the channel coding parameters of the downlink data, or the line code parameters of the downlink data.
  • control information of the downlink data indicates the modulation mode of the downlink data and the channel coding parameter of the downlink data through a first index.
  • control information of the downlink data includes first indication information and/or second indication information; the first indication information is used to indicate whether channel coding is enabled for the downlink data; and the second indication information is used to indicate whether channel coding is enabled for the downlink data. Indicates whether the downstream data has a terminator.
  • the control information of the downlink data when the control information of the downlink data indicates that the downlink data enables channel coding, the control information of the downlink data includes the modulation and coding scheme MCS used to determine the downlink data or the MCS of the downlink data.
  • Information about channel coding parameters when the control information of the downlink data indicates that the downlink data does not enable channel coding, the control information of the downlink data includes information for determining the number of repetitions of the downlink data.
  • the information used to determine the MCS of the downlink data or the channel coding parameter of the downlink data occupies the same bits as the information used to determine the number of repetitions of the downlink data.
  • the control information of the downlink data when the second indication information indicates that the downlink data has no terminator, includes a field for indicating the transmission block size of the downlink data or a code block for indicating the downlink data. size field; when the second indication information indicates that the downlink data has an end character, the control information of the downlink data includes a field for indicating the MCS of the downlink data or a field for indicating the downlink data. Repeat count field.
  • the transceiver unit 1101 may also be configured to receive first information from the second device, where the first information is used to indicate coverage of the synchronization signal corresponding to the downlink data after the downlink data. grade.
  • the transceiver operations of the first device in all embodiments involved in this application can be performed by the transceiver unit 1101, and the processing unit 1102 can be performed by
  • the transceiver unit 1101 can be performed by
  • the processing unit 1102 can be performed by
  • the transceiver unit 1101 can be used to send a synchronization signal to the first device, at least one of the control information of the downlink data.
  • Parameters are related to the synchronization signal, and the at least one parameter includes the resource location of the control information of the downlink data or the first parameter of the control information of the downlink data.
  • the control information of the downlink data is used for scheduling all the downlink data; and, sending the control information of the downlink data to the first device according to the at least one parameter of the control information of the downlink data; and sending the control information of the downlink data to the first device according to the control information of the downlink data.
  • the device sends the downlink data.
  • the processing unit 1102 may be used to control the transceiver unit 1101 to perform the above sending operation.
  • the synchronization signal includes one or more of the following functions: automatic gain control AGC, time synchronization, frequency synchronization, data packet detection or boundary detection.
  • the synchronization signal is located before the control information of the downlink data, and the control information of the downlink data is located before the downlink data.
  • the resource location of the control information of the downlink data is related to the synchronization signal, including: the time domain location of the control information of the downlink data is determined based on the time domain location of the synchronization signal. , and/or, the frequency domain position of the control information of the downlink data is determined based on the frequency domain position of the synchronization signal.
  • the starting time domain position of the control information of the downlink data is adjacent to the ending time domain position of the synchronization signal; or, the starting time domain position of the control information of the downlink data is adjacent to the ending time domain position of the synchronization signal.
  • the parameters of the synchronization signal are related to one or more of the following: the sequence of the synchronization signal, the length of the synchronization signal, the number of repetitions of the synchronization signal or the spread spectrum of the synchronization signal. factor.
  • the center frequency point of the frequency domain resource of the control information of the downlink data is the same as the center frequency point of the frequency domain resource of the synchronization signal, and the bandwidth of the control information of the downlink data is different from the bandwidth of the synchronization signal.
  • the frequency domain resources of the control information of the downlink data are the same as the frequency domain resources of the synchronization signal; or, the starting frequency domain position of the control information of the downlink data is the same as that of the synchronization signal.
  • first frequency domain interval between the end frequency domain positions; the first frequency domain interval is preset, or the first frequency domain interval is configured by the second device, or the first frequency domain interval is The domain interval is related to the parameters of the synchronization signal, and the parameters of the synchronization signal include one or more of the following: the sequence of the synchronization signal, the length of the synchronization signal, the number of repetitions of the synchronization signal, or the synchronization The spreading factor of the signal.
  • the number of bits of the control information of the downlink data is less than X
  • the control information of the downlink data does not use the cyclic redundancy check code CRC
  • the downlink data uses the CRC
  • the X is a positive integer
  • the control information of the downlink data uses CRC
  • the downlink data uses CRC
  • the number of bits corresponding to the CRC used in the control information of the downlink data is L1
  • the number of bits corresponding to the CRC used in the downlink data is L2
  • the L1 and the L2 are different positive integers.
  • the L1 is 6 and the L2 is 16.
  • the L1 is determined based on the number of bits of the control information of the downlink data, and the L2 is 16.
  • the L1 is determined based on the number of bits of the control information of the downlink data, including: when the number of bits of the control information of the downlink data is less than or equal to the first value, the L1 is 6; when the When the number of bits of the control information of the downlink data is greater than the first value, the L1 is 11.
  • control information of the downlink data and the downlink data support channel coding, and the control information of the downlink data and the channel coding type supported by the downlink data are the same.
  • control information of the downlink data includes a field used to indicate the transmission block size of the downlink data or a field used to indicate the code block size of the downlink data.
  • the first parameter of the control information of the downlink data is related to the synchronization signal, including: the first parameter of the control information of the downlink data is determined based on the parameters of the synchronization signal;
  • the parameters of the synchronization signal include one or more of the following: a sequence of the synchronization signal, a length of the synchronization signal, a repetition number of the synchronization signal, or a spreading factor of the synchronization signal.
  • the first parameter of the control information of the downlink data includes one or more of the following: the bandwidth of the control information of the downlink data, the subcarrier spacing of the control information of the downlink data, the control information of the downlink data cyclic prefix CP type, line code parameters of the control information of the downlink data, channel coding parameters of the control information of the downlink data, modulation mode of the control information of the downlink data, repetition of the control information of the downlink data times, the spreading factor of the control information of the downlink data, the data rate of the control information of the downlink data, the time length of the control information of the downlink data, the modulation depth of the control information of the downlink data or the downlink The duty cycle of the data control information.
  • the coverage level of the synchronization signal corresponds to the parameters of the synchronization signal
  • the parameters of the synchronization signal include one or more of the following: the sequence of the synchronization signal, the length of the synchronization signal, the The number of repetitions of the synchronization signal or the spreading factor of the synchronization signal.
  • control information of the downlink data includes one or more of the following: the bandwidth of the downlink data, the frequency domain resource location of the downlink data, the time resource location of the downlink data, the The subcarrier spacing, the CP type of the downlink data, the line code parameters of the downlink data, the channel coding parameters of the downlink data, the modulation mode of the downlink data, the number of repetitions of the downlink data, the downlink data
  • the spreading factor the data rate of the downlink data, the time length of the downlink data, the modulation depth of the downlink data, the duty cycle of the downlink data, the number of time units occupied by the downlink data, or the redundant version of the downstream data.
  • the value range of the second parameter in the control information of the downlink data is related to the parameters of the synchronization signal;
  • the parameters of the synchronization signal include one or more of the following: the sequence of the synchronization signal, The length of the synchronization signal, the number of repetitions of the synchronization signal, or the spreading factor of the synchronization signal;
  • the second parameter in the control information of the downlink data includes one or more of the following: repetition of the downlink data times, the modulation mode of the downlink data, the channel coding parameters of the downlink data or the line code parameters of the downlink data.
  • control information of the downlink data indicates the modulation mode of the downlink data and the channel coding parameter of the downlink data through a first index.
  • control information of the downlink data includes first indication information and/or second indication information; the first indication information is used to indicate whether channel coding is enabled for the downlink data; The second indication information is used to indicate whether the downlink data has a terminator.
  • the control information of the downlink data when the control information of the downlink data indicates that the downlink data enables channel coding, the control information of the downlink data includes information used to determine the modulation and coding scheme MCS or channel coding parameters of the downlink data; when the control information of the downlink data indicates that channel coding is not enabled for the downlink data, the control information of the downlink data includes the number of repetitions used to determine the downlink data. Information.
  • the information used to determine the MCS or channel coding parameters of downlink data occupies the same bits as the information used to determine the number of repetitions of downlink data.
  • the control information of the downlink data when the second indication information indicates that the downlink data has no terminator, includes a field used to indicate the transport block size of the downlink data or a field used to indicate the downlink data. Code block size field; when the second indication information indicates that the downlink data has an end character, the control information of the downlink data includes a field for indicating the MCS of the downlink data or for indicating the number of repetitions of the downlink data. field.
  • the processing unit 1102 can also be used to determine that the coverage level of the synchronization signal corresponding to the downlink data after the downlink data needs to be updated; the transceiver unit 1101 can also be used to send a first signal to the first device. Information, the first information is used to indicate the coverage level of the synchronization signal corresponding to the downlink data after the downlink data.
  • the transceiver operations of the second device in all embodiments involved in this application can be performed by the transceiver unit 1101, and the processing unit 1102 can be performed by
  • the transceiver unit 1101 can be performed by the transceiver unit 1101
  • the processing unit 1102 can be performed by
  • each functional unit in the embodiment of the present application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the above integrated units can be implemented in the form of hardware or software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or part of the contribution or all or part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium and includes a number of instructions. It is used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code. .
  • the communication device 1200 may include a transceiver 1201 and a processor 1202 .
  • the communication device 1200 may also include a memory 1203.
  • the memory 1203 may be disposed inside the communication device 1200 or may be disposed outside the communication device 1200 .
  • the processor 1202 can control the transceiver 1201 to receive and send messages, information, messages or data, etc.
  • the processor 1202 may be a central processing unit (CPU), a network processor (network processor, NP) or a combination of CPU and NP.
  • the processor 1202 may further include hardware chips.
  • the above-mentioned hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL) or any combination thereof.
  • the transceiver 1201, the processor 1202 and the memory 1203 are connected to each other.
  • the transceiver 1201, the processor 1202 and the memory 1203 are connected to each other through a bus 1204;
  • the bus 1204 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard Structure (Extended Industry Standard Architecture, EISA) bus, etc.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of presentation, only one thick line is used in Figure 12, but it does not mean that there is only one bus or one type of bus.
  • the memory 1203 is used to store programs, etc.
  • the program may include program code including computer operating instructions.
  • the memory 1203 may include RAM, and may also include non-volatile memory (non-volatile memory), such as one or more disk memories.
  • the processor 1202 executes the application program stored in the memory 1203 to implement the above functions, thereby realizing the functions of the communication device 1200 .
  • the communication device 1200 may be a device for receiving control information of downlink data, such as the first device in the above embodiment; it may also be a device for sending control information of downlink data, such as the second device in the above embodiment. .
  • the transceiver 1201 can implement the sending and receiving operations performed by the first device in the above embodiment; the processor 1202 can implement the above implementation.
  • other operations other than sending and receiving operations are performed by the first device.
  • the transceiver 1201 can implement the transceiver operation performed by the second device in the above embodiment; the processor 1202 can implement the above Other operations other than the sending and receiving operations performed by the second device in the embodiment.
  • the relevant descriptions please refer to the relevant descriptions in all the above method embodiments, and will not be introduced in detail here.
  • embodiments of the present application provide a communication system, which may include the first device, the second device, etc. involved in the above embodiments.
  • Embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the method provided by the above method embodiment.
  • Embodiments of the present application also provide a computer program product.
  • the computer program product is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the method provided by the above method embodiment.
  • An embodiment of the present application also provides a chip, which includes a processor.
  • the processor is coupled to a memory and is configured to call a program in the memory so that the chip implements the method provided by the above method embodiment.
  • Embodiments of the present application also provide a chip, the chip is coupled to a memory, and the chip is used to implement the method provided in the above method embodiment.
  • embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

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Abstract

一种下行数据的控制信息的接收、发送方法及装置,以灵活准确地发送和接收下行数据的控制信息,以提升下行数据的传输效率。第一设备从第二设备接收同步信号,下行数据的控制信息的至少一项参数与同步信号相关。然后,第一设备可以根据下行数据的控制信息的至少一项参数从第二设备接收下行数据的控制信息;进而,第一设备根据下行数据的控制信息从第二设备接收下行数据。其中,至少一项参数包括下行数据的控制信息的资源位置或下行数据的控制信息的第一参数,下行数据的控制信息用于调度下行数据。通过同步信号明确下行数据的控制信息的接收,可以避免盲检下行数据的控制信息,从而提升下行数据的传输效率。

Description

一种下行数据的控制信息的接收、发送方法及装置
相关申请的交叉引用
本申请要求在2022年07月14日提交中国专利局、申请号为202210833936.7、申请名称为“一种下行数据的控制信息的接收、发送方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域,尤其涉及一种下行数据的控制信息的接收、发送方法及装置。
背景技术
物联网(internet-of-things,IoT)技术的快速发展使得万物互联逐步成为现实,但物联网终端设备的电池寿命较短,这增加了终端设备的维护难度和维护成本,成为制约物联网发展的主要瓶颈。基于无线功率传输、包络检波解调和反射散射调制技术的反向散射(backscatter)通信有望解决终端设备的寿命和维护问题,使得下一代终端设备超低成本、高密度、免维护的无源物联网(passive IoT)成为可能。
广泛应用的超高频(ultra-high frequency,UHF)射频识别(radio frequency identification,RFID)系统就是反向散射通信系统的一种。典型的无源UHF RFID系统架构包括读写器(reader)和标签(tag),其中读写器通过向标签发送下行激励信号为标签提供能量,标签接收读写器发送的信令,并通过反向散射技术向读写器发送上行信号。
除反向散射通信系统外,还存在一种带有唤醒机制的系统(可称唤醒系统),在该系统中,网络设备可以对处于省电模式(power saving mode,PSM)或者睡眠模式的终端设备发送下行唤醒信号(wake-up signal,WUS),以达到终端节能的效果。
在反向散射通信系统和唤醒系统中,终端设备通常会盲检下行数据的控制信息,这样可能会影响下行数据的传输效率。
发明内容
本申请提供一种下行数据的控制信息的接收、发送方法及装置,用以灵活准确地发送和接收下行数据的控制信息,以提升下行数据的传输效率。
第一方面,本申请提供了一种下行数据的控制信息的接收方法,该方法可以应用于第一设备,第一设备中的处理器、芯片或一个功能模块等。以应用于第一设备为例,该方法可以包括:第一设备从第二设备接收同步信号,下行数据的控制信息的至少一项参数与所述同步信号相关。然后,所述第一设备可以根据所述下行数据的控制信息的所述至少一项参数从所述第二设备接收所述下行数据的控制信息;进而,所述第一设备根据所述下行数据的控制信息从所述第二设备接收所述下行数据。其中,所述至少一项参数包括所述下行数据的控制信息的资源位置或所述下行数据的控制信息的第一参数,所述下行数据的控制信息用于调度所述下行数据。
采用上述方法,通过同步信号明确下行数据的控制信息的接收,可以避免盲检下行数据的控制信息,从而提升下行数据的传输效率。并且,不通过同步信号承载下行数据的控制信息,还可以降低同步复杂度。
在一个可能的设计中,所述同步信号包括以下一项或多项功能:自动增益控制(automatic gain control,AGC)、时间同步、频率同步、数据包检测或边界检测。进而,可以通过AGC来调整接收信号的强度减少失真。时间同步可以用于通过获取正确的定时或采样定时。边界检测可以用于检测前导序列和/或下行数据的边界。
在一个可能的设计中,在时域上,所述同步信号位于所述下行数据的控制信息之前,所述下行数据的控制信息位于所述下行数据之前。这样第一设备可以准确地按序接收相应的信号或数据。
在一个可能的设计中,所述下行数据的控制信息的资源位置与所述同步信号相关,可以包括:所述下行数据的控制信息的时域位置可以基于所述同步信号的时域位置确定,和/或,所述下行数据的控制 信息的频域位置可以基于所述同步信号的频域位置确定。这样可以准确地基于同步信号的时域位置和/或频域位置确定下行数据的控制信息的资源位置。
在一个可能的设计中,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置相邻;或者,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置之间间隔第一时间间隔;或者,所述下行数据的控制信息的起始时域位置与所述同步信号的起始时域位置之间间隔第二时间间隔;或者,所述下行数据的控制信息的结束时域位置与所述同步信号的结束时域位置之间间隔第三时间间隔。其中,所述第一时间间隔为预设的,或者所述第一时间间隔为所述第二设备配置的,或者,所述第一时间间隔与所述同步信号的参数相关;所述第二时间间隔为预设的,或者所述第二时间间隔为所述第二设备配置的,或者,所述第二时间间隔与所述同步信号的参数相关;所述第三时间间隔为预设的,或者所述第三时间间隔为所述第二设备配置的,或者,所述第三时间间隔与所述同步信号的参数相关;所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。这样可以通过多种方式灵活准确地通过同步信号确定下行数据的控制信息的时域资源位置。
在一个可能的设计中,所述下行数据的控制信息的频域资源的中心频点可以与所述同步信号的频域资源的中心频点相同,且所述下行数据的控制信息的带宽和所述同步信号的带宽不同;或者,所述下行数据的控制信息的频域资源和所述同步信号的频域资源相同;或者,所述下行数据的控制信息的起始频域位置与所述同步信号的结束频域位置之间间隔第一频域间隔;或者,所述下行数据的控制信息的起始频域位置与所述同步信号的起始频域位置之间间隔第二频域间隔;或者,所述下行数据的控制信息的结束频域位置与所述同步信号的结束频域位置之间间隔第三频域间隔。其中,所述第一频域间隔为预设的,或者所述第一频域间隔为所述第二设备配置的,或者,所述第一频域间隔与所述同步信号的参数相关。所述第二频域间隔为预设的,或者所述第二频域间隔为所述第二设备配置的,或者,所述第二频域间隔与所述同步信号的参数相关。所述第三频域间隔为预设的,或者所述第三频域间隔为所述第二设备配置的,或者,所述第三频域间隔与所述同步信号的参数相关。所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。这样可以通过多种方式灵活准确地通过同步信号的频域资源确定下行数据的控制信息的频域资源位置。
在一个可能的设计中,所述下行数据的控制信息的比特数小于X,所述下行数据的控制信息不使用循环冗余码校验码(cyclic redundancy check,CRC),所述下行数据使用CRC,所述X为正整数;或者,所述下行数据的控制信息使用CRC,所述下行数据使用CRC,所述下行数据的控制信息使用的CRC对应的比特数为L1,所述下行数据使用的CRC对应的比特数为L2,所述L1和所述L2为不同的正整数。假设下行数据的控制信息占用的比特数记为N1,下行数据的控制信息使用的CRC的比特数记为L1,下行数据的控制信息不使用CRC时,可认为L1为0,一般来说,N1要小于下行数据占用的比特数,此时L1采用比较小的值,可以降低CRC的开销,即可以降低L1/(N1+L1),进而可以减少传输下行数据的控制信息的所需要的资源。
在一个可能的设计中,所述L1为6,所述L2为16或24。这样实现比较简单。
在一个可能的设计中,所述L1可以基于所述下行数据的控制信息的比特数确定。假设下行数据的控制信息占用的比特数记为N1,下行数据的控制信息使用的CRC的比特数记为L1,下行数据的控制信息不使用CRC时,可认为L1为0,根据N1确定L1的取值,使得CRC的开销可以灵活调整,N1较少时,可以采用较小的L1,可以降低CRC的开销,即可以降低L1/(N1+L1);N1较大时,可以采用较大的L1,能够维持一个可接受的CRC开销,同时保证CRC校验的性能,因为CRC的比特数越长,检验错误的能力越强。
在一个可能的设计中,所述L1基于所述下行数据的控制信息的比特数确定,方法可以为:当所述下行数据的控制信息的比特数小于或者等于第一值时,所述L1为6;当所述下行数据的控制信息的比特数大于所述第一值时,所述L1为11。假设下行数据的控制信息占用的比特数记为N1,下行数据的控制信息使用的CRC的比特数记为L1,下行数据的控制信息不使用CRC时,可认为L1为0,根据N1确定L1的取值,使得CRC的开销可以灵活调整,N1较少时,可以采用较小的L1,可以降低CRC的开销,即可以降低L1/(N1+L1);N1较大时,可以采用较大的L1,能够维持一个可接受的CRC开销,同时保证CRC校验的性能,因为CRC的比特数越长,检验错误的能力越强。
在一个可能的设计中,所述下行数据的控制信息和所述下行数据支持信道编码,且所述下行数据的 控制信息和所述下行数据支持的信道编码类型相同。下行数据的控制信息和下行数据支持信道编码,可以提升下行数据的控制信息和下行数据传输的可靠性。两者采用相同的信道编码类型,对于第二设备来说,可以复用相同的编码器,可以降低第二设备的实现复杂度,对于第一设备来说,可以复用相同的译码器,可以降低第一设备的实现复杂度。
在一个可能的设计中,所述下行数据的控制信息中包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段。下行数据的控制信息中包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段,第二设备可以根据下行数据的控制信息对下行数据进行正确译码,避免对下行数据的传输块大小或下行数据的码块大小进行盲检测,降低第一设备对下行数据译码的复杂度。
在一个可能的设计中,所述下行数据的控制信息的第一参数与所述同步信号相关,可以包括:所述下行数据的控制信息的第一参数可以基于所述同步信号的参数确定;所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。这样,可以结合实际的同步信号准确地确定所述下行数据的控制信息的第一参数。
在一个可能的设计中,所述下行数据的控制信息的第一参数可以包括以下一项或多项:所述下行数据的控制信息的带宽、所述下行数据的控制信息的子载波间隔、所述下行数据的控制信息的循环前缀(cyclic prefix,CP)类型、所述下行数据的控制信息的线路码参数、所述下行数据的控制信息的信道编码参数、所述下行数据的控制信息的调制方式、所述下行数据的控制信息的重复次数、所述下行数据的控制信息的扩频因子、所述下行数据的控制信息的数据速率、所述下行数据的控制信息的时间长度、所述下行数据的控制信息的调制深度或所述下行数据的控制信息的占空比。这样后续第一设备可以通过上述参数准确地接收下行数据的控制信息。
在一个可能的设计中,所述同步信号的覆盖等级与所述同步信号的参数对应,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。这样可以通过同步信号的参数准确确定同步信号的覆盖等级,进而第一设备可以根据同步信号确定下行的信道质量。
在一个可能的设计中,所述下行数据的控制信息可以包括以下一项或多项:所述下行数据的带宽、所述下行数据的频域资源位置、所述下行数据的时间资源位置、所述下行数据的子载波间隔、所述下行数据的CP类型、所述下行数据的线路码参数、所述下行数据的信道编码参数、所述下行数据的调制方式、所述下行数据的重复次数、所述下行数据的扩频因子、所述下行数据的数据速率、所述下行数据的时间长度、所述下行数据的调制深度、所述下行数据的占空比、所述下行数据的占用的时间单元数或所述下行数据的冗余版本。这样后续第一设备可以通过上述内容准确地接收下行数据。
在一个可能的设计中,所述下行数据的控制信息中的第二参数的取值范围可以与所述同步信号的参数相关;其中,所述同步信号的参数可以包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子;所述下行数据的控制信息中的第二参数可以包括以下一项或多项:所述下行数据的重复次数、所述下行数据的调制方式、所述下行数据的信道编码参数或所述下行数据的线路码参数。这样可以结合实际的同步信号准确确定上述第二参数。
在一个可能的设计中,所述下行数据的控制信息可以通过第一索引指示所述下行数据的调制方式和所述下行数据的信道编码参数。这样可以降低下行数据的控制信息指示的信令开销。
在一个可能的设计中,所述下行数据的控制信息可以包括第一指示信息和/或第二指示信息;所述第一指示信息用于指示所述下行数据是否启用信道编码;所述第二指示信息用于指示所述下行数据是否有结束符。这样可以灵活指示下行数据的传输方式。
在一个可能的设计中,当所述下行数据的控制信息指示所述下行数据启用信道编码时,所述下行数据的控制信息中包括用于确定所述下行数据的调制和编码方案(modulation and coding scheme,MCS)或所述下行数据的信道编码参数的信息;当所述下行数据的控制信息指示所述下行数据不启用信道编码时,所述下行数据的控制信息中包括用于确定所述下行数据的重复次数的信息。这样可以灵活控制下行数据的传输。
在一个可能的设计中,所述用于确定所述下行数据的MCS或所述下行数据的信道编码参数的信息,与所述用于确定所述下行数据的重复次数的信息占用相同的比特。这样可以在不同情况下通过相同的比特指示不同功能,减少比特占用。
在一个可能的设计中,当所述第二指示信息指示所述下行数据无结束符时,所述下行数据的控制信息中可以包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段;当所述第二指示信息指示所述下行数据有结束符时,所述下行数据的控制信息中可以包括用于指示所述下行数据的MCS的字段或用于指示所述下行数据的重复次数的字段。这样可以灵活控制下行数据的传输。
在一个可能的设计中,所述第一设备从所述第二设备接收第一信息,所述第一信息用于指示所述下行数据之后的下行数据对应的同步信号的覆盖等级。这样在覆盖等级需要切换时及时切换覆盖等级,提升数据传输准确性。
第二方面,本申请提供了一种下行数据的控制信息的发送方法,该方法可以应用于第一设备,第一设备中的处理器、芯片或一个功能模块等。以应用于第二设备为例,该方法可以包括:第二设备向第一设备发送同步信号,下行数据的控制信息的至少一项参数与所述同步信号相关。然后,所述第二设备可以根据所述下行数据的控制信息的所述至少一项参数向所述第一设备发送所述下行数据的控制信息。进而,所述第二设备根据所述下行数据的控制信息向所述第一设备发送所述下行数据。其中,所述至少一项参数可以包括所述下行数据的控制信息的资源位置或所述下行数据的控制信息的第一参数,所述下行数据的控制信息用于调度所述下行数据。
采用上述方法,通过同步信号明确下行数据的控制信息的发送,可以避免第一设备盲检下行数据的控制信息,从而提升下行数据的传输效率。并且,不通过同步信号承载下行数据的控制信息,还可以降低同步复杂度。
在一个可能的设计中,所述同步信号包括以下一项或多项功能:自动增益控制AGC、时间同步、频率同步、数据包检测或边界检测。进而,可以通过AGC来调整接收信号的强度减少失真。时间同步可以用于通过获取正确的定时或采样定时。边界检测可以用于检测前导序列和/或下行数据的边界。
在一个可能的设计中,在时域上,所述同步信号位于所述下行数据的控制信息之前,所述下行数据的控制信息位于所述下行数据之前。这样第二设备可以准确地按序发送相应的信号或数据。
在一个可能的设计中,所述下行数据的控制信息的资源位置与所述同步信号相关,可以包括:所述下行数据的控制信息的时域位置基于所述同步信号的时域位置确定,和/或,所述下行数据的控制信息的频域位置基于所述同步信号的频域位置确定。这样可以准确地基于同步信号的时域位置和/或频域位置确定下行数据的控制信息的资源位置。
在一个可能的设计中,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置相邻;或者,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置之间间隔第一时间间隔;或者,所述下行数据的控制信息的起始时域位置与所述同步信号的起始时域位置之间间隔第二时间间隔;或者,所述下行数据的控制信息的结束时域位置与所述同步信号的结束时域位置之间间隔第三时间间隔。其中,所述第一时间间隔为预设的,或者所述第一时间间隔为所述第二设备配置的,或者,所述第一时间间隔与所述同步信号的参数相关;所述第二时间间隔为预设的,或者所述第二时间间隔为所述第二设备配置的,或者,所述第二时间间隔与所述同步信号的参数相关;所述第三时间间隔为预设的,或者所述第三时间间隔为所述第二设备配置的,或者,所述第三时间间隔与所述同步信号的参数相关;所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。这样可以通过多种方式灵活准确地通过同步信号确定下行数据的控制信息的时域资源位置。
在一个可能的设计中,所述下行数据的控制信息的频域资源的中心频点可以与所述同步信号的频域资源的中心频点相同,且所述下行数据的控制信息的带宽和所述同步信号的带宽不同;或者,所述下行数据的控制信息的频域资源可以和所述同步信号的频域资源相同;或者,所述下行数据的控制信息的起始频域位置与所述同步信号的结束频域位置之间可以间隔第一频域间隔;或者,所述下行数据的控制信息的起始频域位置与所述同步信号的起始频域位置之间间隔第二频域间隔;或者,所述下行数据的控制信息的结束频域位置与所述同步信号的结束频域位置之间间隔第三频域间隔。其中,所述第一频域间隔为预设的,或者所述第一频域间隔为所述第二设备配置的,或者,所述第一频域间隔与所述同步信号的参数相关。所述第二频域间隔为预设的,或者所述第二频域间隔为所述第二设备配置的,或者,所述第二频域间隔与所述同步信号的参数相关。所述第三频域间隔为预设的,或者所述第三频域间隔为所述第二设备配置的,或者,所述第三频域间隔与所述同步信号的参数相关。所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩 频因子。这样可以通过多种方式灵活准确地通过同步信号的频域资源确定下行数据的控制信息的频域资源位置。
在一个可能的设计中,所述下行数据的控制信息的比特数小于X,所述下行数据的控制信息不使用循环冗余码校验码CRC,所述下行数据使用CRC,所述X为正整数;或者,所述下行数据的控制信息使用CRC,所述下行数据使用CRC,所述下行数据的控制信息使用的CRC对应的比特数为L1,所述下行数据使用的CRC对应的比特数为L2,所述L1和所述L2为不同的正整数。假设下行数据的控制信息占用的比特数记为N1,下行数据的控制信息使用的CRC的比特数记为L1,下行数据的控制信息不使用CRC时,可认为L1为0,一般来说,N1要小于下行数据占用的比特数,此时L1采用比较小的值,可以降低CRC的开销,即可以降低L1/(N1+L1),进而可以减少传输下行数据的控制信息的所需要的资源。
在一个可能的设计中,所述L1为6,所述L2为16或24。这样实现比较简单。
在一个可能的设计中,所述L1可以基于所述下行数据的控制信息的比特数确定。假设下行数据的控制信息占用的比特数记为N1,下行数据的控制信息使用的CRC的比特数记为L1,下行数据的控制信息不使用CRC时,可认为L1为0,根据N1确定L1的取值,使得CRC的开销可以灵活调整,N1较少时,可以采用较小的L1,可以降低CRC的开销,即可以降低L1/(N1+L1);N1较大时,可以采用较大的L1,能够维持一个可接受的CRC开销,同时保证CRC校验的性能,因为CRC的比特数越长,检验错误的能力越强。
在一个可能的设计中,所述L1基于所述下行数据的控制信息的比特数确定,方法可以为:当所述下行数据的控制信息的比特数小于或者等于第一值时,所述L1为6;当所述下行数据的控制信息的比特数大于所述第一值时,所述L1为11。假设下行数据的控制信息占用的比特数记为N1,下行数据的控制信息使用的CRC的比特数记为L1,下行数据的控制信息不使用CRC时,可认为L1为0,根据N1确定L1的取值,使得CRC的开销可以灵活调整,N1较少时,可以采用较小的L1,可以降低CRC的开销,即可以降低L1/(N1+L1);N1较大时,可以采用较大的L1,能够维持一个可接受的CRC开销,同时保证CRC校验的性能,因为CRC的比特数越长,检验错误的能力越强。
在一个可能的设计中,所述下行数据的控制信息和所述下行数据支持信道编码,且所述下行数据的控制信息和所述下行数据支持的信道编码类型相同。下行数据的控制信息和下行数据支持信道编码,可以提升下行数据的控制信息和下行数据传输的可靠性。两者采用相同的信道编码类型,对于第二设备来说,可以复用相同的编码器,可以降低第二设备的实现复杂度,对于第一设备来说,可以复用相同的译码器,可以降低第一设备的实现复杂度。
在一个可能的设计中,所述下行数据的控制信息中包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段。下行数据的控制信息中包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段,第二设备可以根据下行数据的控制信息对下行数据进行正确译码,避免对下行数据的传输块大小或下行数据的码块大小进行盲检测,降低第一设备对下行数据译码的复杂度。
在一个可能的设计中,所述下行数据的控制信息的第一参数与所述同步信号相关,可以为:所述下行数据的控制信息的第一参数可以基于所述同步信号的参数确定;所述同步信号的参数可以包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。这样,可以结合实际的同步信号准确地确定所述下行数据的控制信息的第一参数。
在一个可能的设计中,所述下行数据的控制信息的第一参数可以包括以下一项或多项:所述下行数据的控制信息的带宽、所述下行数据的控制信息的子载波间隔、所述下行数据的控制信息的循环前缀CP类型、所述下行数据的控制信息的线路码参数、所述下行数据的控制信息的信道编码参数、所述下行数据的控制信息的调制方式、所述下行数据的控制信息的重复次数、所述下行数据的控制信息的扩频因子、所述下行数据的控制信息的数据速率、所述下行数据的控制信息的时间长度、所述下行数据的控制信息的调制深度或所述下行数据的控制信息的占空比。这样后续第二设备可以通过上述参数准确地发送下行数据的控制信息。
在一个可能的设计中,所述同步信号的覆盖等级与所述同步信号的参数对应,所述同步信号的参数可以包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。这样可以通过同步信号的参数准确确定同步信号的覆盖等级,进而第一设备可 以根据同步信号确定下行的信道质量。
在一个可能的设计中,所述下行数据的控制信息可以包括以下一项或多项:所述下行数据的带宽、所述下行数据的频域资源位置、所述下行数据的时间资源位置、所述下行数据的子载波间隔、所述下行数据的CP类型、所述下行数据的线路码参数、所述下行数据的信道编码参数、所述下行数据的调制方式、所述下行数据的重复次数、所述下行数据的扩频因子、所述下行数据的数据速率、所述下行数据的时间长度、所述下行数据的调制深度、所述下行数据的占空比、所述下行数据的占用的时间单元数或所述下行数据的冗余版本。这样后续第二设备可以通过上述内容准确地发送下行数据。
在一个可能的设计中,所述下行数据的控制信息中的第二参数的取值范围可以与所述同步信号的参数相关;所述同步信号的参数可以包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子;所述下行数据的控制信息中的第二参数可以包括以下一项或多项:所述下行数据的重复次数、所述下行数据的调制方式、所述下行数据的信道编码参数或所述下行数据的线路码参数。这样可以结合实际的同步信号准确确定上述第二参数。
在一个可能的设计中,所述下行数据的控制信息通过第一索引指示所述下行数据的调制方式和所述下行数据的信道编码参数。这样可以降低下行数据的控制信息指示的信令开销。
在一个可能的设计中,所述下行数据的控制信息可以包括第一指示信息和/或第二指示信息;所述第一指示信息用于指示所述下行数据是否启用信道编码;所述第二指示信息用于指示所述下行数据是否有结束符。这样可以灵活指示下行数据的传输方式。
在一个可能的设计中,当所述下行数据的控制信息指示所述下行数据启用信道编码时,所述下行数据的控制信息中包括用于确定下行数据的调制和编码方案MCS或信道编码参数的信息;当所述下行数据的控制信息指示所述下行数据不启用信道编码时,所述下行数据的控制信息中包括用于确定下行数据的重复次数的信息。这样可以灵活指示下行数据的传输方式。
在一个可能的设计中,所述用于确定下行数据的MCS或信道编码参数的信息,与所述用于确定下行数据的重复次数的信息占用相同的比特。这样可以在不同情况下通过相同的比特指示不同功能,减少比特占用。
在一个可能的设计中,当所述第二指示信息指示所述下行数据无结束符时,所述下行数据的控制信息中包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段;当所述第二指示信息指示所述下行数据有结束符时,所述下行数据的控制信息中包括用于指示下行数据的MCS的字段或用于指示下行数据的重复次数的字段。这样可以灵活控制下行数据的传输。
在一个可能的设计中,所述第二设备确定所述下行数据之后的下行数据对应的同步信号的覆盖等级需要更新;进而,所述第二设备可以向所述第一设备发送第一信息,所述第一信息用于指示所述下行数据之后的下行数据对应的同步信号的覆盖等级。这样在覆盖等级需要切换时及时切换覆盖等级,提升数据传输准确性。
第三方面,本申请提供了一种下行数据的控制信息的接收、发送方法,该方法可以包括:第二设备向第一设备发送同步信号,相应地,第一设备从第二设备接收所述同步信号,下行数据的控制信息的至少一项参数与所述同步信号相关,所述至少一项参数包括所述下行数据的控制信息的资源位置或所述下行数据的控制信息的第一参数,所述下行数据的控制信息用于调度所述下行数据;后续,所述第二设备根据所述下行数据的控制信息的所述至少一项参数向所述第一设备发送所述下行数据的控制信息;相应地,所述第一设备根据所述下行数据的控制信息的所述至少一项参数从所述第二设备接收所述下行数据的控制信息;最后,所述第二设备根据所述下行数据的控制信息向所述第一设备发送所述下行数据;相应地,所述第一设备根据所述下行数据的控制信息从所述第二设备接收所述下行数据。
采用上述方法,通过同步信号明确下行数据的控制信息的接收,可以避免盲检下行数据的控制信息,从而提升下行数据的传输效率。并且,不通过同步信号承载下行数据的控制信息,还可以降低同步复杂度。
在一个可能的设计中,所述下行数据的控制信息的资源位置与所述同步信号相关,可以包括:所述下行数据的控制信息的时域位置基于所述同步信号的时域位置确定,和/或,所述下行数据的控制信息的频域位置基于所述同步信号的频域位置确定。这样可以准确地基于同步信号的时域位置和/或频域位置确定下行数据的控制信息的资源位置。
在一个可能的设计中,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置相 邻;或者,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置之间间隔第一时间间隔;所述第一时间间隔为预设的,或者所述第一时间间隔为所述第二设备配置的,或者,所述第一时间间隔与所述同步信号的参数相关,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。这样可以通过多种方式灵活准确地通过同步信号确定下行数据的控制信息的时域资源位置。
在一个可能的设计中,所述下行数据的控制信息的比特数小于X,所述下行数据的控制信息不使用循环冗余码校验码CRC,所述X为正整数;或者,所述下行数据的控制信息使用CRC,所述下行数据使用CRC,所述下行数据的控制信息使用的CRC对应的比特数为L1,所述下行数据使用的CRC对应的比特数为L2,所述L1和所述L2为不同的正整数。假设下行数据的控制信息占用的比特数记为N1,下行数据的控制信息使用的CRC的比特数记为L1,下行数据的控制信息不使用CRC时,可认为L1为0,一般来说,N1要小于下行数据占用的比特数,此时L1采用比较小的值,可以降低CRC的开销,即可以降低L1/(N1+L1),进而可以减少传输下行数据的控制信息的所需要的资源。
在一个可能的设计中,所述下行数据的控制信息的第一参数与所述同步信号相关,可以包括:所述下行数据的控制信息的第一参数基于所述同步信号的参数确定;所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。这样,可以结合实际的同步信号准确地确定所述下行数据的控制信息的第一参数。
在一个可能的设计中,所述下行数据的控制信息的第一参数包括以下一项或多项:所述下行数据的控制信息的带宽、所述下行数据的控制信息的子载波间隔、所述下行数据的控制信息的循环前缀CP类型、所述下行数据的控制信息的线路码参数、所述下行数据的控制信息的信道编码参数、所述下行数据的控制信息的调制方式、所述下行数据的控制信息的重复次数、所述下行数据的控制信息的扩频因子、所述下行数据的控制信息的数据速率、所述下行数据的控制信息的时间长度、所述下行数据的控制信息的调制深度或所述下行数据的控制信息的占空比。这样后续第一设备可以通过上述参数准确地接收下行数据的控制信息。
在一个可能的设计中,所述下行数据的控制信息包括以下一项或多项:所述下行数据的带宽、所述下行数据的频域资源位置、所述下行数据的时间资源位置、所述下行数据的子载波间隔、所述下行数据的CP类型、所述下行数据的线路码参数、所述下行数据的信道编码参数、所述下行数据的调制方式、所述下行数据的重复次数、所述下行数据的扩频因子、所述下行数据的数据速率、所述下行数据的时间长度、所述下行数据的调制深度、所述下行数据的占空比、所述下行数据的占用的时间单元数或所述下行数据的冗余版本。这样后续第一设备可以通过上述内容准确地接收下行数据。
在一个可能的设计中,所述下行数据的控制信息中的第二参数的取值范围与所述同步信号的参数相关;所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子;所述下行数据的控制信息中的第二参数包括以下一项或多项:所述下行数据的重复次数、所述下行数据的调制方式、所述下行数据的信道编码参数或所述下行数据的线路码参数。这样可以结合实际的同步信号准确确定上述第二参数。
第四方面,本申请还提供了一种下行数据的控制信息的发送装置,所述下行数据的控制信息的发送装置具有实现上述第一方面或第一方面的各个可能的设计示例中,或者上述第三方面或第三方面的各个可能的设计示例中第一设备的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中,所述下行数据的控制信息的发送装置的结构中包括收发单元和处理单元,这些单元可以执行上述第一方面或第一方面的各个可能的设计示例中,或者上述第三方面或第三方面的各个可能的设计示例中第一设备的相应功能,具体参见方法示例中的详细描述,此处不做赘述。
在一个可能的设计中,所述下行数据的控制信息的发送装置的结构中包括收发器和处理器,可选的还包括存储器,所述收发器用于收发信息、信号或数据,以及用于与通信系统中的其他设备进行通信交互,所述处理器被配置为支持所述下行数据的控制信息的发送装置执行上述第一方面或第一方面的各个可能的设计示例中,或者上述第三方面或第三方面的各个可能的设计示例中第一设备的相应的功能。所述存储器与所述处理器耦合,其保存所述下行数据的控制信息的发送装置必要的程序指令和数据。
在一个可能的设计中,所述下行数据的控制信息的发送装置的结构中包括存储器和处理器,所述处理器被配置为支持所述下行数据的控制信息的发送装置执行上述第一方面或第一方面的各个可能的设 计示例中,或者上述第三方面或第三方面的各个可能的设计示例中第一设备的相应的功能。所述存储器与所述处理器耦合,其保存所述下行数据的控制信息的发送装置必要的程序指令和数据。
第五方面,本申请还提供了一种下行数据的控制信息的接收装置,所述下行数据的控制信息的接收装置具有实现上述第二方面或第二方面的各个可能的设计示例,或者上述第三方面或第三方面的各个可能的设计示例中第二设备的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中,所述下行数据的控制信息的接收装置的结构中包括收发单元和处理单元,这些单元可以执行上述第二方面或第二方面的各个可能的设计示例中,或者上述第三方面或第三方面的各个可能的设计示例中第二设备的相应功能,具体参见方法示例中的详细描述,此处不做赘述。
在一个可能的设计中,所述下行数据的控制信息的接收装置的结构中包括收发器和处理器,可选的还包括存储器,所述收发器用于收发信息、信号或数据,以及用于与通信系统中的其他设备进行通信交互,所述处理器被配置为支持所述下行数据的控制信息的接收装置执行上述第二方面或第二方面的各个可能的设计示例中,或者上述第三方面或第三方面的各个可能的设计示例中第二设备的相应的功能。所述存储器与所述处理器耦合,其保存所述下行数据的控制信息的接收装置必要的程序指令和数据。
在一个可能的设计中,所述下行数据的控制信息的接收装置的结构中包括存储器和处理器,所述处理器被配置为支持所述下行数据的控制信息的接收装置执行上述第二方面或第二方面的各个可能的设计示例中,或者上述第三方面或第三方面的各个可能的设计示例中第二设备的相应的功能。所述存储器与所述处理器耦合,其保存所述下行数据的控制信息的接收装置必要的程序指令和数据。
第六方面,本申请实施例提供了一种通信系统,可以包括上述提及的第一设备和第二设备。
第七方面,本申请实施例提供的一种计算机可读存储介质,该计算机可读存储介质存储有程序指令,当程序指令在计算机上运行时,使得计算机执行本申请实施例第一方面及其任一可能的设计,或第二方面及其任一可能的设计中所述的方法。示例性的,计算机可读存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于:计算机可读介质可以包括非瞬态计算机可读介质、随机存取存储器(random-access memory,RAM)、只读存储器(read-only memory,ROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。
第八方面,本申请实施例提供一种包括计算机程序代码或指令的计算机程序产品,当其在计算机上运行时,使得计算机实现上述第一方面或第一方面任一种可能的设计,或者第二方面或第二方面任一种可能的设计,或者第三方面或第三方面任一种可能的设计中所述的方法。
第九方面,本申请还提供了一种芯片,包括处理器,所述处理器与存储器耦合,用于读取并执行所述存储器中存储的程序指令,以使所述芯片实现上述第一方面或第一方面任一种可能的设计,或者第二方面或第二方面任一种可能的设计,或者第三方面或第三方面任一种可能的设计中所述的方法。
上述第四方面至第九方面中的各个方面以及各个方面可能达到的技术效果请参照上述针对第一方面或第一方面中的各种可能方案,或者上述第二方面或第二方面中的各种可能方案,或者上述第三方面或第三方面中的各种可能方案可以达到的技术效果说明,这里不再重复赘述。
附图说明
图1a为本申请提供的一种通信系统的架构示意图;
图1b为本申请提供的一种信号包络的示意图;
图2为本申请提供的一种下行数据的控制信息的发送和接收方法的流程图;
图3为本申请提供的一种下行数据的控制信息的起始时域位置与同步信号的结束时域位置相邻的示意图;
图4为本申请提供的一种下行数据的控制信息的起始时域位置与同步信号的结束时域位置之间间隔第一时间间隔的示意图;
图5为本申请提供的一种下行数据的控制信息的频域资源的中心频点与同步信号的频域资源的中心频点相同,且下行数据的控制信息的带宽和同步信号的带宽不同的示意图;
图6为本申请提供的一种下行数据的控制信息的频域资源和同步信号的频域资源相同的示意图;
图7为本申请提供的一种下行数据的控制信息的起始频域位置与同步信号的起始频域位置之间间隔第二频域间隔的示意图;
图8为本申请提供的一种不同重复等级的同步信号与下行数据的控制信息的关联关系的示意图;
图9为本申请提供的一种读写器和标签的通信过程的示意图;
图10为本申请提供的一种覆盖等级切换的示意图;
图11为本申请提供的一种通信装置的结构示意图;
图12为本申请提供的一种通信装置的结构图。
具体实施方式
下面将结合附图对本申请作进一步地详细描述。
本申请实施例提供一种下行数据的控制信息的接收、发送方法及装置,用以灵活准确地发送和接收下行数据的控制信息,以提升下行数据的传输效率。其中,本申请所述方法和装置基于同一技术构思,由于方法及装置解决问题的原理相似,因此装置与方法的实施可以相互参见,重复之处不再赘述。
在本申请的描述中,“第一”、“第二”等词汇,仅用于区分描述的目的,而不能理解为指示或暗示相对重要性,也不能理解为指示或暗示顺序。
在本申请中的描述中,“至少一个(种)”是指一个(种)或者多个(种),多个(种)是指两个(种)或者两个(种)以上。“以下至少一项”或其类似表达,是指的这些项中的任意组合,包括单项或复数项的任意组合。例如,a,b,或c中的至少一项,可以表示:a,b,c,a和b,a和c,b和c,或,a和b和c,其中,a,b,c可以是单个,也可以是多个。
本申请的描述中“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B的情况,其中A、B可以是单数或者复数。“/”表示“或”,例如a/b表示a或b。
为了更加清晰地描述本申请实施例的技术方案,下面结合附图,对本申请实施例下行数据的控制信息的接收、发送方法及装置进行详细说明。
本申请提供的通信方法可以应用于各类通信系统中,例如,本申请实施例可以适用于物联网(internet of things,IoT)网络、反向散射通信系统或唤醒系统中。当然,本申请实施例还可以适用于其他可能的通信系统,例如,长期演进(long term evolution,LTE)系统、LTE频分双工(frequency division duplex,FDD)系统、LTE时分双工(time division duplex,TDD)、高级的长期演进(LTE advanced,LTE-A)系统、通用移动通信系统(universal mobile telecommunication system,UMTS)、全球互联微波接入(worldwide interoperability for microwave access,WiMAX)通信系统、第五代(5th generation,5G)通信系统(如新空口(new radio,NR)系统),以及未来的第六代(6th generation,6G)通信系统或未来的其他通信系统或网络等。只要该通信系统中存在实体可以发送信息,该通信系统也存在其它实体可以接收信息即可。
上述适用本申请的通信系统仅是举例说明,适用本申请的通信系统不限于此,在此统一说明,以下不再赘述。
示例性的,图1a示出了本申请提供的通信方法适用的一种可能的通信系统的架构,该通信系统的结构中可以包括至少一个网络设备和至少一个终端设备。例如,图1a所示,该通信系统中可以包括网络设备1和网络设备2两个网络设备,以及终端设备1到终端设备8八个终端设备。
在该通信系统中,网络设备1可以发送信息给终端设备1~终端设备6中的一个或多个终端设备。网络设备1可以通过网络设备2发送信息给终端设备7和终端设备8中的一个或多个终端设备。此外,终端设备4到终端设备6也可以组成一个子通信系统,在该子通信系统中,终端设备5可以发送信息给终端设备4和终端设备6中的一个或多个终端设备。网络设备2,终端设备7和终端设备8也可以组成一个子通信系统,该子通信系统中,网络设备2可以发送信息给终端设备7和终端设备8中的一个或多个终端设备。应理解,图1a仅是一种示意图,本申请并不对通信系统的类型,以及通信系统内包括的设备的数量、类型等进行具体限定。
其中,网络设备可以为具有无线收发功能的设备或可设置于该网络设备的芯片,该网络设备包括但不限于:LTE的基站(eNodeB),NR的基站(generation node B,gNB)、无线网络控制器(radio network controller,RNC)、节点B(Node B,NB)、基站控制器(base station controller,BSC)、基站收发台(base  transceiver station,BTS)、家庭基站(例如,home evolved NodeB,或home Node B,HNB)、基带单元(baseband unit,BBU),无线保真(wireless fidelity,Wi-Fi)系统中的接入点(access point,AP)、无线中继节点、无线回传节点、传输点接收点(transmission and reception point,TRP)、传输点(transmission point,TP)等,还可以为构成gNB或传输点的网络节点,如基带单元(BBU),或,分布式单元(distributed unit,DU)等。网络设备是基站时,可以是宏基站,也可以微基站,小基站,或者杆站。网络设备可以是支持接收通过发射通信传输的数据的网络设备,也可以是支持发送唤醒信号的网络设备。
所述终端设备也可以称为用户设备(user equipment,UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality,VR)终端设备、增强现实(augmented reality,AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智能穿戴设备(智能眼镜、智能手表、智能耳机等)、智慧家庭(smart home)中的无线终端、机器类通信的终端设备等等。终端设备可以是支持唤醒接收机的终端设备,也可以是不支持唤醒接收机的终端设备。终端设备可以是支持反射通信的终端设备,比如标签。终端设备也可以是能够设置于以上设备的芯片或芯片模组(或芯片系统)等。本申请的实施例对应用场景不做限定。本申请中将具有无线收发功能的终端设备及可设置于前述终端设备的芯片统称为终端设备。
本申请实施例描述的通信系统的架构以及场景是为了更加清楚的说明本申请实施例的技术方案,并不构成对于本申请实施例提供的技术方案的限定,本领域普通技术人员可知,随着网络架构的演变和新业务场景的出现,本申请实施例提供的技术方案对于类似的技术问题,同样适用。
由于目前终端设备在需要接收下行数据时,通常会盲检下行数据的控制信息,在盲检到下行数据的控制信息之后,再基于下行数据的控制信息来接收下行数据,然而这样可能会影响下行数据的传输效率。
反向散射通信系统和唤醒系统一般都是异步系统,即终端设备和网络设备未实现严格同步。因此目前在下行信号的有效数据之前插入同步信号(或前导码),供终端设备完成下行信号检测和帧同步功能。一种实施例中,为了减少终端设备对下行数据的控制信息的盲检,可以在同步信号中承载下行数据的控制信息,以使终端设备可以准确接收到下行数据的控制信息,以提升下行数据的传输效率。
然而,如果采用上述方法,终端设备在接收同步信号时处于未同步状态,需要执行大量运算以获取时间同步,同步信号承载下行数据的控制信息会增加相关运算复杂度,可能会导致增加终端设备同步复杂度。比如同步信号承载的下行数据的控制信息占用N比特,终端设备相关运算的复杂度可能会增加2N倍。
基于此,本申请实施例提出一种通信方法,可以在不增加同步复杂度的基础上,灵活准确地发送和接收下行数据的控制信息,以提升下行数据的传输效率。
为了便于理解本申请实施例涉及的技术方案,以下对本申请实施例涉及的技术术语进行解释和说明。
1)线路编码,作用是消除或减少数字电信号中的直流和低频分量,以便于在有线/无线信道中传输、接收及监测。
2)调制符号序列,可以是指由一个或多个调制符号构成的序列。
3)调制深度,可以定义为D=(A-B)/A,其中A表示信号的包络的最大值,B表示信号的包络的最小值。例如,一种信号包络的示意图可以如下图1b所示。
4)包络纹波,表示射频信号包络在高电平或低电平时的幅度波动Mh和Ml,其中,Mh表示幅度向上波动的大小,Ml表示幅度向下波动的大小。
需要说明的是,在本申请实施例中以第一设备接收下行数据的控制信息,第二设备发送下行数据的控制信息为例说明。应理解,第一设备执行的操作也可以由第一设备中的处理器,或者是芯片或芯片系统,或者是一个功能模块等实现。第二设备执行的操作也可以由第二设备中的处理器,或者是芯片或芯片系统,或者是一个功能模块等实现,本申请对此不作限定。例如,第一设备可以为阅读器或读写器(Reader),形态可以是网络设备或终端设备;第二设备可以是标签(Tag),形态可以是终端设备,本申请不作限定。
基于以上描述,本申请实施例提供的一种下行数据的控制信息的发送和接收方法,可以参阅图2所示,该方法的具体流程可以包括:
步骤201:第二设备向第一设备发送同步信号,相应地,第一设备从第二设备接收同步信号。其中,下行数据的控制信息的至少一项参数与所述同步信号相关,所述至少一项参数可以包括所述下行数据的控制信息的资源位置或所述下行数据的控制信息的第一参数。所述下行数据的控制信息可以用于调度所述下行数据。
其中,所述同步信号的功能可以包括以下一项或多项功能:自动增益控制(automatic gain control,AGC)、时间同步、频率同步、数据包检测或边界检测等。AGC可以用于通过调整接收信号的强度减少失真。时间同步可以用于通过获取正确的定时或采样定时。边界检测可以用于检测前导序列和/或下行数据的边界。
同步信号也可以称为前导码(preamble)。在时域上,同步信号可以位于下行数据的控制信息之前,下行数据的控制信息可以位于下行数据之前。用于传输同步信号的时域资源和用于传输下行数据的控制信息的时域资源可以是连续的,也可以是不连续的。用于传输下行数据的控制信息的时域资源和用于传输下行数据的时域资源可以是连续的,也可以是不连续的。
所述下行数据的控制信息的至少一项参数与所述同步信号相关,可以理解为所述下行数据的控制信息的至少一项参数可以基于所述同步信号确定。
在一种可选的实施方式中,所述下行数据的控制信息的资源位置与所述同步信号相关,可以包括以下三种情况:
情况a1、所述下行数据的控制信息的时域位置基于所述同步信号的时域位置确定。
在该情况a1中,所述下行数据的控制信息的频域位置可以是预设的,或者通过其它方式确定的,本申请不作限定。
情况a2、所述下行数据的控制信息的频域位置基于所述同步信号的频域位置确定。
在该情况a2中,所述下行数据的控制信息的时域位置可以是预设的,或者通过其它方式确定的,本申请不作限定。
情况a3、所述下行数据的控制信息的时域位置基于所述同步信号的时域位置确定,以及所述下行数据的控制信息的频域位置基于所述同步信号的频域位置确定。
可选的,在上述三种情况中,在所述下行数据的控制信息的时域位置基于所述同步信号的时域位置确定的情况下,可以通过如下方式来实现基于所述同步信号的时域位置确定所述下行数据的控制信息的时域位置:
方式b1、所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置相邻,例如图3所示。
该方式b1也可以理解为所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置相邻之间没有间隔。或者,该方式b1也可以理解为所述下行数据的控制信息和所述同步信号占用连续的时域资源。
其中,本申请中,下行数据的控制信息占用的时域资源是第一设备接收下行数据的控制信息的时域资源,第二设备发送下行数据的控制信息的时域资源。同步信号占用的时域资源是第一设备接收同步信号的时域资源,第二设备发送同步信号的时域资源。
方式b2、所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置之间间隔第一时间间隔,例如图4所示。
示例性的,所述第一时间间隔为预设的。或者所述第一时间间隔为所述第二设备配置的,也即该第一时间间隔是第二设备通知第一设备的。或者,所述第一时间间隔与所述同步信号的参数相关,即所述第一时间间隔可以基于同步信号确定,所述同步信号的参数可以包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。所述第一时间间隔与所述同步信号的参数相关,具体可以是同步信号的参数不同取值与不同时间间隔之间有关联关系,第一时间间隔对应同步信号的参数的一些具体取值。例如,同步信号的不同序列,同步信号的不同长度,同步信号的不同重复次数或同步信号的不同扩频因子关联(对应)不同的时间间隔。
其中,可选的,当该第一时间间隔为0时,可以理解为上述方式b1的情况。
需要说明的是,本申请中,所述同步信号的参数的内容如上述一项或多项,其他涉及处不再一一说明。
方式b3、所述下行数据的控制信息的起始时域位置与所述同步信号的起始时域位置之间间隔第二 时间间隔。
示例性的,所述第二时间间隔为预设的。或者所述第二时间间隔为所述第二设备配置的,也即该第二时间间隔是第二设备通知第一设备的。或者,所述第二时间间隔与所述同步信号的参数相关,即所述第二时间间隔可以基于同步信号确定。所述同步信号的参数可以参见上述方式b2中的描述。
方式b4、所述下行数据的控制信息的结束时域位置与所述同步信号的结束时域位置之间间隔第三时间间隔。
示例性的,所述第三时间间隔为预设的。或者所述第三时间间隔为所述第二设备配置的,也即该第三时间间隔是第二设备通知第一设备的。或者,所述第三时间间隔与所述同步信号的参数相关,即所述第三时间间隔可以基于同步信号确定。所述同步信号的参数可以参见上述方式b2中的描述。
需要说明的是,除上述方式b1-方式b4以外,还可以有多种方式实现,本申请不再一一说明。
可选的,在上述三种情况中,在所述下行数据的控制信息的频域位置基于所述同步信号的频域位置确定的情况下,可以通过如下方式来实现基于所述同步信号的频域位置确定所述下行数据的控制信息的频域位置:
方式c1、所述下行数据的控制信息的频域资源的中心频点与所述同步信号的频域资源的中心频点相同,且所述下行数据的控制信息的带宽和所述同步信号的带宽不同,例如图5所示。
其中,本申请中,下行数据的控制信息的频域资源是第一设备接收下行数据的控制信息的频域资源,第二设备发送下行数据的控制信息的频域资源。同步信号的频域资源是第一设备接收同步信号的频域资源,第二设备发送同步信号的频域资源。
方式c2、所述下行数据的控制信息的频域资源和所述同步信号的频域资源相同,例如图6所示。
该方式c2也可以理解为所述下行数据的控制信息的频域资源的中心频点与所述同步信号的频域资源的中心频点相同,且所述下行数据的控制信息的带宽和所述同步信号的带宽相同。
方式c3、所述下行数据的控制信息的起始频域位置与所述同步信号的结束频域位置之间间隔第一频域间隔。
示例性的,所述第一频域间隔可以为预设的。或者所述第一频域间隔可以为所述第二设备配置的,也即该第一频域间隔是第二设备通知第一设备的。或者,所述第一频域间隔与所述同步信号的参数相关,即所述第一频域间隔可以基于同步信号确定。
所述第一频域间隔与所述同步信号的参数相关,具体可以是同步信号的参数不同取值与不同频域间隔之间有关联关系,第一频域间隔对应同步信号的参数的一些具体取值。例如,同步信号的不同序列,同步信号的不同长度,同步信号的不同重复次数或同步信号的不同扩频因子关联(对应)不同的频域间隔。
其中,可选的,该第一频域间隔可以为0,此时可以理解为所述下行数据的控制信息的频域资源和所述同步信号的频域资源是连续的,或者说是相邻的。
方式c4、所述下行数据的控制信息的起始频域位置与所述同步信号的起始频域位置之间间隔第二频域间隔,例如图7所示。
示例性的,所述第二频域间隔可以为预设的。或者所述第二频域间隔可以为所述第二设备配置的,也即该第二频域间隔是第二设备通知第一设备的。或者,所述第二频域间隔与所述同步信号的参数相关,即所述第二频域间隔可以基于同步信号确定。
方式c5、所述下行数据的控制信息的结束频域位置与所述同步信号的结束频域位置之间间隔第三频域间隔。
示例性的,所述第三频域间隔可以为预设的。或者所述第三频域间隔可以为所述第二设备配置的,也即该第三频域间隔是第二设备通知第一设备的。或者,所述第三频域间隔与所述同步信号的参数相关,即所述第三频域间隔可以基于同步信号确定。
需要说明的是,除上述方式c1-方式c5以外,还可以有多种方式实现,本申请不再一一说明。
一种可能的实现方式中,所述下行数据的控制信息的比特数可以小于X,所述下行数据的控制信息不使用循环冗余码校验码(cyclic redundancy check,CRC),X可以为正整数。可选的,在所述下行数据的控制信息不使用CRC时,所述下行数据可以使用CRC。
需要说明的是,本申请中不使用CRC也可以理解不附加CRC,使用CRC也可以理解为附加CRC。
一种举例中,X可以为小于或者等于12的正整数,例如X可以为2或3或4或5或6或7或8或 9或10或11或12等。
在另一种可能的实现方式中,所述下行数据的控制信息可以使用CRC,所述下行数据也可以使用CRC,所述下行数据的控制信息使用的CRC对应的比特数为L1,所述下行数据使用的CRC对应的比特数为L2,所述L1和所述L2可以为不同的正整数,也可以为相同的正整数。
一种举例中,L1为6,L2为16或24,即所述下行数据的控制信息使用的CRC对应的比特数为6,所述下行数据使用的CRC对应的比特数为16。这样可以使后续CRC多项式复用当前CRC多项式,从而实现简单。
又一种举例中,所述L1可以基于所述下行数据的控制信息的比特数确定。例如,当所述下行数据的控制信息的比特数小于或者等于第一值时,所述L1可以为6等;当所述下行数据的控制信息的比特数大于所述第一值时,所述L1可以为11等。可选的,这种情况下,所述下行数据使用的CRC对应的比特数可以为16等。
其中,下行数据的控制信息或者下行数据使用的CRC对应的比特数为某个值时,可以对应相同的CRC的生成多项式。例如,CRC对应的比特数为16时,CRC的生成多项式可以为gCRC16(D)=[D16+D12+D5+1]。CRC对应的比特数为11时,CRC的生成多项式可以为gCRC11(D)=[D11+D10+D9+D5+1]。CRC对应的比特数为6时,CRC的生成多项式可以为gCRC6(D)=[D6+D5+1]。
在一种可选的实施方式中,所述下行数据的控制信息和所述下行数据可以支持信道编码,且所述下行数据的控制信息和所述下行数据支持的信道编码类型相同。例如,下行数据的控制信息和下行数据可以均采用极化(polar)码。
在一种可选的实施方式中,所述下行数据的控制信息可以采用分组码(block code)。下行数据的控制信息待编码的比特数可以记为K,下行数据的控制信息待编码的比特序列可以记为c0,c1,c2,c3,…,cK-1,下行数据的控制信息编码后的比特序列可以记为d0,d1,d2,d3,…,dN-1,其中N为下行数据的控制信息编码后的比特数。
当K=1时,下行数据的控制信息待编码的比特序列为c0,N=1,下行数据的控制信息编码后的比特序列d0=c0。或者,下行数据的控制信息待编码的比特序列为c0,下行数据的控制信息编码后的比特序列可以根据下表1确定,其中N=Qm,Qm为下行数据的控制信息的调制阶数。
表1
上述表1中,"x"和"y"为占位符(placeholders),主要作用是使得携带信息比特的调制符号的欧式距离最大。
当K=2时,下行数据的控制信息待编码的比特序列为c0,c1,N=3,下行数据的控制信息编码后的比特序列d0=c0,d1=c1,d2=c2,其中c2=(c0+c1)mod 2。或者,下行数据的控制信息待编码的比特序列为c0,c1,下行数据的控制信息编码后的比特序列可以根据下表2确定,其中N=3Qm,Qm为下行数据的控制信息的调制阶数。
表2
上述表2中,"x"为占位符(placeholders),主要作用是使得携带信息比特的调制符号的欧式距离最大。
当3≤K≤11时,下行数据的控制信息编码后的比特序列满足:其中i=0,1,…,N-1,N=32,Mi,k表示基础序列,Mi,k通过下表3确定。
表3
在下行数据的控制信息支持信道编码时,所述下行数据的控制信息中可以包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段。
在一种可选的实施方式中,所述下行数据的控制信息的第一参数与所述同步信号相关,可以理解为所述下行数据的控制信息的第一参数可以基于所述同步信号确定。具体的,所述下行数据的控制信息的第一参数可以基于所述同步信号的参数确定。例如,同步信号的序列,同步信号的长度,同步信号的重复次数或同步信号的扩频因子中的一项或多项与下行数据的控制信息的第一参数存在对应关系。同步信号的不同序列,同步信号的不同长度,同步信号的不同重复次数或同步信号的不同扩频因子中的一项或多项可以对应下行数据的控制信息不同的第一参数的取值。
示例性的,所述下行数据的控制信息的第一参数可以包括以下一项或多项:所述下行数据的控制信息的带宽、所述下行数据的控制信息的子载波间隔、所述下行数据的控制信息的循环前缀(cyclic prefix,CP)类型、所述下行数据的控制信息的线路码参数、所述下行数据的控制信息的信道编码参数、所述下行数据的控制信息的调制方式、所述下行数据的控制信息的重复次数、所述下行数据的控制信息的扩频因子、所述下行数据的控制信息的数据速率、所述下行数据的控制信息的时间长度、所述下行数据的控制信息的调制深度或所述下行数据的控制信息的占空比(duty cycle)。
例如,下表4示出下行数据的控制信息的第一参数与同步序列的对应关系的示例。
表4
在上表4中,同步信号为序列1时,即[W],其中W为一个序列,序列的元素可以是0或1,或者,序列的元素为+1或-1,或者,序列的元素为复数,a+bj,其中j2=-1,a和b为实数,例如W=[0 1 0 1 1 0],下行数据的控制信息的带宽为1个资源块(resource block,RB),下行数据的控制信息采用曼切斯特(manchester)编码,下行数据的控制信息采用极化(polar)码,极化码的码率为1,下行数据的控制信息采用OOK调制方式,下行数据的控制信息的重复次数为1。同步信号为序列2时,即[W,W’],其中W和前面描述类似,不再赘述,W’为W通过一种预设变换得到,比如W’为W逐元素取反得到,例如W=[0 1 0 1 1 0],W’=[1 0 1 0 0 1],此时序列2为[W’W’]=[1 0 1 0 0 1 1 0 1 0 0 1]。下行数据的控制信息的带宽为1个RB,下行数据的控制信息采用manchester编码,下行数据的控制信息采用polar码,极化码的码率为1/4,下行数据的控制信息采用OOK调制方式,下行数据的控制信息的重复次数为8。同步信号为序列3时,即[W’W W’W],其中W和前面描述类似,不再赘述,W’为W通过一种预设变换得到,比如W’为W逐元素取反得到,例如W=[0 1 0 1 1 0],W’=[1 0 1 0 0 1],此时序列3为[W’ W W’ W]=[1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 1 0]。下行数据的控制信息的带宽为1个RB,下行数据的控制信息采用manchester编码,下行数据的控制信息采用polar码,极化码的码率为1/4,下行数据的控制信息采用OOK调制方式,下行数据的控制信息的重复次数为64。
需要说明的是,上述表4仅为一种示例,并不作为对本申请的限定。
需要说明的是,上述表4中示出的是一个同步信号的序列对应一组下行数据的控制信息的第一参数,可选的,一个同步信号的序列也可以对应多组下行数据的控制信息的第一参数,后续第一设备接收同步信号后,可以按照多组下行数据的控制信息的第一参数的方式进行盲检,接收第二设备发送的下行数据的控制信息。
在一种可选的实施方式中,所述同步信号的覆盖等级与所述同步信号的参数对应。例如,所述同步信号的不同序列、所述同步信号的不同长度、所述同步信号的不同重复次数或所述同步信号的不同扩频因子可以对应同步信号的不同覆盖等级。其中,覆盖等级也可以替换为重复等级、覆盖增强等级或增强覆盖等级等其他描述,本申请中仅以覆盖等级为例说明。例如,图8示出了不同重复等级的同步信号与下行数据的控制信息的关联关系的示意图。
示例性的,所述下行数据的控制信息可以包括以下一项或多项:所述下行数据的带宽、所述下行数据的频域资源位置、所述下行数据的时间资源位置、所述下行数据的子载波间隔、所述下行数据的CP类型、所述下行数据的线路码参数、所述下行数据的信道编码参数、所述下行数据的调制方式、所述下行数据的重复次数、所述下行数据的扩频因子、所述下行数据的数据速率、所述下行数据的时间长度、所述下行数据的调制深度、所述下行数据的占空比、所述下行数据的占用的时间单元数或所述下行数据的冗余版本。
在一种可能的方式中,所述下行数据的控制信息中的第二参数的取值范围与所述同步信号的参数相关,也即所述下行数据的控制信息中的第二参数的取值范围基于所述同步信号的参数确定。其中,所述下行数据的控制信息中的第二参数可以包括以下一项或多项:所述下行数据的重复次数、所述下行数据的调制方式、所述下行数据的信道编码参数或所述下行数据的线路码参数等。可选的,上述第二参数可以理解为控制参数,也可以理解为覆盖相关参数。其中取值范围也可以示例为取值集合等。
例如,第二参数为下行数据的重复次数,假设同步信号有覆盖等级0,覆盖等级1和覆盖等级2三 个覆盖等级,可以根据同步信号的覆盖等级确定下行数据的重复次数的取值集合。比如,同步信号的覆盖等级为覆盖等级0,下行数据的控制信息中指示的下行数据的重复次数的取值集合可以为{1,2,4,8}。同步信号的覆盖等级为覆盖等级1,下行数据的控制信息中指示的下行数据的重复次数的取值集合可以为{4,8,16,32}。同步信号的覆盖等级为覆盖等级2,下行数据的控制信息中指示的下行数据的重复次数的取值集合可以为{16,32,64,128}。一般情况下,无论同步信号处于哪种覆盖等级,下行数据的重复次数的取值集合均按照{1,2,4,8,16,32,64,128}的方案,下行数据的控制信息指示下行数据的重复次数需要3比特。而本申请实施例中,下行数据的重复次数的取值集合可以根据同步信号确定,下行数据的控制信息指示下行数据的重复次数只需要2比特,可以降低下行数据的控制信息指示下行数据的重复次数的信令开销。
可选的,所述下行数据的调制方式和所述下行数据的信道编码参数可以联合指示,例如所述下行数据的控制信息可以通过第一索引指示所述下行数据的调制方式和所述下行数据的信道编码参数。示例性的,所述第一索引可以是调制和编码方案(modulation and coding scheme,MCS)索引。
在一种可选的实施方式中,所述下行数据的控制信息还可以包括第一指示信息和/或第二指示信息;所述第一指示信息可以用于指示所述下行数据是否启用信道编码;所述第二指示信息可以用于指示所述下行数据是否有结束符。
一种示例中,当所述下行数据的控制信息指示所述下行数据启用信道编码时,所述下行数据的控制信息中可以包括用于确定所述下行数据的MCS或所述下行数据的信道编码参数的信息(域、字段等);当所述下行数据的控制信息指示所述下行数据不启用信道编码时,所述下行数据的控制信息中可以包括用于确定所述下行数据的重复次数的信息(域、字段等)。
可选的,所述用于确定所述下行数据的MCS或所述下行数据的信道编码参数的信息,与所述用于确定所述下行数据的重复次数的信息可以占用相同的比特。例如,可以称该相同的比特为第一域。
例如,所述第一指示信息可以包括1个比特,该1个比特的不同取值指示所述下行数据是否启用信道编码。一种举例来说,所述第一指示信息包括的1个比特取值为1时,可以表示所述下行数据启用信道编码,所述第一指示信息包括的1个比特取值为0时,可以表示所述下行数据不启用信道编码。下表5示出了下行数据的控制信息中第一指示信息和第一域的具体示例。
表5
又一种示例中,当所述第二指示信息指示所述下行数据无结束符时,所述下行数据的控制信息中可以包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段;当所述第二指示信息指示所述下行数据有结束符时,所述下行数据的控制信息中可以包括用于指示所述下行数据的MCS的字段或用于指示所述下行数据的重复次数的字段。
可选的,所述输块大小或码块大小,与所述下行数据的MCS或所述下行数据的重复次数可以占用相同的比特。例如,可以称该相同的比特为第二域。
例如,所述第二指示信息可以包括1个比特,该1个比特的不同取值指示所述下行数据是否有结束符。一种举例来说,所述第二指示信息包括的1个比特取值为1时,可以表示所述下行数据无结束符,所述第一指示信息包括的1个比特取值为0时,可以表示所述下行数据有结束符。下表6示出了下行数据的控制信息中第二指示信息和第二域的具体示例。
表6
可选的,当上述第一指示信息和第二指示信息不同时存在时,第一域和第二域可以为相同的比特,也可以为不同的比特,本申请不作限定。
步骤202:所述第二设备根据所述下行数据的控制信息的所述至少一项参数向所述第一设备发送所述下行数据的控制信息。相应地,所述第一设备根据所述下行数据的控制信息的所述至少一项参数从所述第二设备接收所述下行数据的控制信息。
示例性的,所述第二设备先根据所述同步信号确定所述下行数据的控制信息的所述至少一项参数,进而再根据所述下行数据的控制信息的所述至少一项参数向所述第一设备发送所述下行数据的控制信息。所述第一设备可以先所述同步信号确定所述下行数据的控制信息的所述至少一项参数,进而再根据所述下行数据的控制信息的所述至少一项参数从所述第二设备接收所述下行数据的控制信息。
可选的,下行数据的控制信息可以通过物理下行控制信道(physical downlink control channel,PDCCH)承载,或者也可以通过其它信息或信令等承载,本申请不作限定。
步骤203:所述第二设备根据所述下行数据的控制信息向所述第一设备发送所述下行数据。相应地,所述第一设备根据所述下行数据的控制信息从所述第二设备接收所述下行数据。
可选的,所述下行数据可以通过物理下行共享信道(physical downlink shared channel,PDSCH)或PDCCH承载。例如,下行数据可以为应用层数据和/或控制信令。控制信令可以是无线资源控制(radio resource control,RRC)信令,媒体接入控制控制单元(media access control control element,MAC CE),MAC协议数据单元(protocol data unit,PDU)中的一种或多种。
在一种可选的实施方式中,所述第二设备确定所述下行数据之后的下行数据对应的同步信号的覆盖等级需要更新,则所述第二设备向所述第一设备发送第一信息,所述第一信息用于指示所述下行数据之后的下行数据对应的同步信号的覆盖等级。相应地,所述第一设备从所述第二设备接收第一信息,从而,所述第一设备可以基于所述第一信息确定所述下行数据之后的下行数据对应的同步信号的覆盖等级。
目前,无源物联系统中,读写器(Reader)发送连续包含高电平的波形给无源标签(Tag),标签接收能量后通过反向链路将信息反射给接收器(Receiver)。在射频识别(radio frequency identification,RFID)空口协议ISO 18000-6C中,定义标签反射采用动态时隙ALOHA技术进行反射。如图9所示,读写器和标签的通信过程可以为:
1)选择标签过程。读写器首先发送选择(Select)信令,利用该选择信令为盘存和访问选择一个特定的标签/标签群。选择信令的参数可以包括目标(Target)、行动(Action)、内存位置(Membank)、指针(Pointer)、长度(Length)、掩码(Mask)和截短(Truncate)。各个参数具体的含义可以如下表7所示:
表7

2)盘存标签过程。标签接收到来自读写器的查询(Query)信令,查询信令的参数包括Q,待盘存的标签从(0,2Q-1)的范围内选出一个随机数装入它们的时隙计数器中,此时选到非0值的标签转移到仲裁状态,选到0值的标签进入响应状态,并响应一个RN16,随后读写器回答一个包含同样RN16的确认(acknowledgement character,ACK)命令确认标签。被确认的标签转移到确认状态,并回答它的程序计数器(program counter,PC),电子产品码(electronic product code,EPC)和CRC-16,完成标签的基本信息盘存过程。当已被识别的标签接收到重复查询(QueryRep)或者调节查询(QueryAdjust)信令时,此时标签的盘存标志(A→B或B→A)置反,转移到就绪状态,并结束该轮盘存过程。
QueryRep信令重复先前查询操作,不改变任何参数,处于仲裁状态的标签,每接收到一条QueryRep信令时,它们的时隙计数器中的值减1,此时时隙计数器中值减为0的标签重复和上述相同的应答过程。QueryAdjust信令重复先前查询操作,并可增减Q。另外如果处于仲裁状态的标签接收到一条QueryAdjust信令时,调整Q值,然后重新在(0,2Q-1)的范围内选出一个随机数装入它们的时隙计数器中,此时选到非0值的标签转移到仲裁状态,选到0值的标签进入响应状态。
基于上述流程,可选的,所述第二设备确定所述下行数据之后的下行数据对应的同步信号的覆盖等级需要更新可以包括如下方法:第二设备如果在接收RN16时检测到冲突,或者第二设备在一定时长内没接收到RN16则可以确定所述下行数据之后的下行数据对应的同步信号的覆盖等级需要更新。
示例性的,所述第二设备向所述第一设备发送第一信息时,第二设备可通过复用QueryRep信令,或者一个新的下行信令(名称不限定),或者下行控制信息(downlink control information,DCI)来通知第一设备后续下行数据对应的同步信号的覆盖等级。
上述更新覆盖等级也可以称为覆盖等级切换。例如,基于上述方法,一种覆盖等级切换的示意图可以如图10所示。
采用上述下行数据的控制信息的发送和接收方法,通过同步信号明确下行数据的控制信息的发送和接收,可以避免盲检下行数据的控制信息,从而提升下行数据的传输效率。同时,不通过同步信号承载下行数据的控制信息,还可以降低同步复杂度。
对于本申请的所有实施例,一种可能的实现方式,对于下行数据,下行数据的控制信息,同步信号中的至少一项,其调制方式可以为开关键控(on-off keying,OOK),多载波开关键控(multicarrier on-off keying,MC-OOK),双边带幅移键控(double-sideband amplitude-shift keying,DSB-ASK),单边带幅移键控(single-sideband amplitude-shift keying,SSB-ASK),相位反转幅移键控(phase-reversal amplitude shift keying,PR-ASK),多幅移键控(multiple amplitude-shift keying,MASK),频移键控(frequency-shift keying,FSK),高斯频移键控(gauss frequency shift keying,GFSK),多频移键控(multiple frequency-shift keying,MFSK),二进制相移键控(binary phase shift keying,BPSK),四相相移键控(quadrature phase shift keying,QPSK),脉冲幅度调制(pulse amplitude modulation,PAM),脉冲宽度调制(pulse-width modulation,PWM),脉冲位置调制(pulse position modulation,PPM),脉冲密度调制(pulse density modulation,PDM),或脉冲编码调制(Pulse-code modulation,PCM)。
对于本申请的所有实施例,一种可能的实现方式,第一设备可以通过同步信号确定同步信号之后是否有下行控制信道,其中下行控制信道可以用来承载下行数据的控制信息。或者,第一设备从第二设备获取第一配置信息,该第一配置信息指示同步信号之后是否有下行控制信道,其中下行控制信道可以用来承载下行数据的控制信息。
对于本申请的所有实施例,一种可能的实现方式,第一设备可以向第二设备发送能力信息,相应地,第二设备可以接收来自第一设备的能力信息,所述能力信息包括以下至少一项:第一设备是否支持下行控制信道,第一设备是否支持信道编码,第一设备支持的信道编码类型,第一设备是否支持线路码,第一设备支持的线路码类型,第一设备是否支持混合自动重传请求确认(hybrid automatic repeat request acknowledgement,HARQ-ACK)反馈。其中第一设备是否支持信道编码具体可以是对于下行,第一设备是否支持信道编码。第一设备支持的信道编码类型具体可以是对于下行,第一设备支持的信道编码类 型。第一设备是否支持线路码具体可以是对于下行,第一设备是否支持线路码。第一设备支持的线路码类型具体可以是对于下行,第一设备支持的线路码类型。第一设备是否支持HARQ-ACK反馈,具体可以是对于下行,第一设备是否支持HARQ-ACK反馈。其中下行可以是下行控制信道和/或下行数据信道。需要说明的是,上述能力信息中,多种能力信息可以关联,对于关联的多种能力信息,第一设备只需要上报其中该关联的多种能力信息中的一种能力信息。通过这种方式可以节省第一设备上报能力信息的开销。一个示例,第一设备是否支持信道编码和第一设备是否支持下行控制信道可以关联,比如第一设备上报能力信息,能力信息的内容为第一设备支持信道编码,则表示第一设备也支持下行控制信道。第一设备上报能力信息,能力信息的内容为第一设备不支持信道编码,则表示第一设备也不支持下行控制信道。另一个示例,第一设备是否支持HARQ-ACK反馈和第一设备是否支持控制信道可以关联。比如第一设备上报能力信息,能力信息的内容为第一设备支持HARQ-ACK反馈,则表示第一设备也支持下行控制信道。第一设备上报能力信息,能力信息的内容为第一设备不支持HARQ-ACK反馈,则表示第一设备也不支持下行控制信道。
对于本申请的所有实施例,一种可能的实现方式,第一设备可以向第二设备发送能力信息,相应地,第二设备可以接收来自第一设备的能力信息,所述能力信息包括以下至少一项:第一设备支持下行控制信道,第一设备支持信道编码,第一设备支持的信道编码类型,第一设备支持线路码,第一设备支持的线路码类型,第一设备支持HARQ-ACK反馈。其中第一设备支持信道编码具体可以是对于下行,第一设备支持信道编码。第一设备支持的信道编码类型具体可以是对于下行,第一设备支持的信道编码类型。第一设备支持线路码具体可以是对于下行,第一设备支持线路码。第一设备支持的线路码类型具体可以是对于下行,第一设备支持的线路码类型。第一设备支持HARQ-ACK反馈,具体可以是对于下行,第一设备支持HARQ-ACK反馈。其中下行可以是下行控制信道和/或下行数据信道。若第一设备不向第二设备发送能力信息,该能力信息为第一设备支持下行控制信道,或者,若第二设备没有接收到来自第一设备的能力信息,该能力信息为第一设备支持下行控制信道,则表示第一设备不支持下行控制信道。若第一设备不向第二设备发送能力信息,该能力信息为第一设备支持信道编码,或者,若第二设备没有接收到来自第一设备的能力信息,该能力信息为第一设备支持信道编码,则表示第一设备不支持信道编码。若第一设备不向第二设备发送能力信息,该能力信息为第一设备支持线路码,或者,若第二设备没有接收到来自第一设备的能力信息,该能力信息为第一设备支持线路码,则表示第一设备不支持线路码。若第一设备不向第二设备发送能力信息,该能力信息为第一设备支持HARQ-ACK反馈,或者,若第二设备没有接收到来自第一设备的能力信息,该能力信息为第一设备支持HARQ-ACK反馈,则表示第一设备不支持HARQ-ACK反馈。需要说明的是,上述能力信息中,多种能力信息可以关联,对于关联的多种能力信息,第一设备只需要上报其中该关联的多种能力信息中的一种能力信息,通过这种方式可以节省第一设备上报能力信息的开销。一个示例,第一设备支持信道编码和第一设备支持下行控制信道可以关联,比如第一设备上报能力信息,能力信息的内容为第一设备支持信道编码,则表示第一设备也支持下行控制信道。另一个示例,第一设备支持HARQ-ACK反馈和第一设备支持控制信道可以关联。比如第一设备上报能力信息,能力信息的内容为第一设备支持HARQ-ACK反馈,则表示第一设备也支持下行控制信道。
对于本申请的所有实施例,一种可能的实现方式,第二设备可以向第一设备发送第二配置信息,相应地,第一设备可以接收来自第二设备的第二配置信息,所述第二配置信息包括以下配置信息中的至少一项:是否使能(enable)下行控制信道,是否使能信道编码,使能的信道编码类型,是否使能线路码,使能的线路码类型,是否使能HARQ-ACK反馈。应理解,这里的“使能(enable)”也可以表述为“激活(activate)”。其中是否使能信道编码具体可以是对于下行,第二设备是否使能信道编码。使能的信道编码类型具体可以是对于下行,第二设备使能的信道编码类型。是否使能线路码具体可以是对于下行,第二设备是否使能线路码。使能的线路码类型具体可以是对于下行,第二设备使能的线路码类型。是否使能HARQ-ACK反馈具体可以是对于下行,第二设备是否使能HARQ-ACK反馈。其中下行可以是下行控制信道和/或下行数据信道。需要说明的是,上述多种配置信息可以关联,对于关联的多种配置信息,第二设备只需要发送其中该关联的多种配置信息中的一种配置信息。通过这种方式可以节省第二设备发送第二配置信息的开销。一个示例,是否使能信道编码和是否使能下行控制信道可以关联,比如第二设备发送第二配置信息,第二配置信息包括的内容为使能信道编码,则表示第二设备也使能下行控制信道。第二设备发送第二配置信息,第二配置信息的内容为不使能信道编码,则表示第二设备也不使能 下行控制信道。另一个示例,第二设备是否使能HARQ-ACK反馈和第二设备是否使能控制信道可以关联。比如第二设备发送第二配置信息,第二配置信息的内容为使能HARQ-ACK反馈,则表示第二设备也使能下行控制信道。第二设备发送第二配置信息,第二配置信息的内容为不使能HARQ-ACK反馈,则表示第二设备也不使能下行控制信道。
对于本申请的所有实施例,一种可能的实现方式,第二设备可以向第一设备发送第二配置信息,相应地,第一设备可以接收来自第二设备的第二配置信息,所述第二配置信息包括以下至少一项:使能(enable)下行控制信道,使能信道编码,使能的信道编码类型,使能线路码,使能的线路码类型,使能HARQ-ACK反馈。应理解,这里的“使能(enable)”也可以表述为“激活(activate)”。其中使能信道编码具体可以是对于下行,第二设备使能信道编码。使能的信道编码类型具体可以是对于下行,第二设备使能的信道编码类型。使能线路码具体可以是对于下行,第二设备使能线路码。使能的线路码类型具体可以是对于下行,第二设备使能的线路码类型。使能HARQ-ACK反馈具体可以是对于下行,第二设备使能HARQ-ACK反馈。其中下行可以是下行控制信道和/或下行数据信道。若第二设备不向第一设备发送第二配置信息,该第二配置信息为使能下行控制信道,或者,若第一设备没有接收到来自第二设备的第二配置信息,该第二配置信息为使能下行控制信道,则表示第二设备没有使能下行控制信道。若第二设备不向第一设备发送第二配置信息,该第二配置信息为使能信道编码,或者,若第一设备没有接收到来自第二设备的第二配置信息,该第二配置信息为使能信道编码,则表示第二设备没有使能信道编码。若第二设备不向第一设备发送第二配置信息,该第二配置信息为使能线路码,或者,若第一设备没有接收到来自第二设备的第二配置信息,该第二配置信息为使能线路码,则表示第二设备没有使能线路码。若第二设备不向第一设备发送第二配置信息,该第二配置信息为使能HARQ-ACK反馈,或者,若第一设备没有接收到来自第二设备的第二配置信息,该第二配置信息为使能HARQ-ACK反馈,则表示第二设备没有使能HARQ-ACK反馈。需要说明的是,上述多种配置信息可以关联,对于关联的多种配置信息,第二设备只需要发送其中该关联的多种配置信息中的一种配置信息。通过这种方式可以节省第二设备发送第二配置信息的开销。一个示例,使能信道编码和使能下行控制信道可以关联,比如第二设备发送第二配置信息,第二配置信息包括的内容为使能信道编码,则表示第二设备也使能下行控制信道。另一个示例,第二设备使能HARQ-ACK反馈和第二设备使能控制信道可以关联。比如第二设备发送第二配置信息,第二配置信息的内容为使能HARQ-ACK反馈,则表示第二设备也使能下行控制信道。
对于本申请的所有实施例,一种可能的实现方式,第一设备向第二设备发送能力信息。相应地,第二设备接收来自第一设备的能力信息。也就是说,第一设备可以向第二设备上报能力信息。
可选地,能力信息可以包括以下一项或多项:第一设备是否支持能量收集,第一设备是否支持低功耗接收机,或者第一设备是否支持反向散射通信。
应理解,第一设备支持能量收集可以是指第一设备支持从环境中自主地获取能量,该能量的来源可以是以下至少一种:光,无线电波(radio waves),温差(temperature differences)、振动(vibrations)、运动(motion)、盐度梯度(salinity gradients)、风或水流(water flows)。第一设备将从环境中获取的能量转化为电能。能量收集的好处是替代电池给设备供电或补充电池能量,从而延长设备使用寿命,通过能量收集的方式产生的能量可以提供给第一设备的信号处理或者数据存储电路,以维持第一设备正常的工作状态。
应理解,第一设备支持低功耗接收机可以是指第一设备支持以非相干接收的方式接收信号。低功耗接收机可以避免采用功耗较大的射频模块,例如高线性度的混频器,能提供精确本振信号的压控振荡器等,因此低功耗接收机可以达到较低的功耗水平。其中非相干的接收方式可以是包络检波,或者差分解调等。该信号可以是来自第二设备的信号。第一设备支持低功耗接收机可以是指第一设备只具备低功耗接收机,或者,第一设备同时具备低功耗接收机和传统接收机。传统接收机和低功耗接收机不同,传统接收机的接收机架构可以为超外差,零中频或低中频,传统接收机可以支持相干接收。传统接收机需要采用一些高性能高精度的模块电路来保证接收机接收性能,如高增益高线性度的低噪声放大器,高线性度的混频器,能提供精确本振信号的压控振荡器等,这些模块电路功耗较高,因此一定时长内,传统接收机的功耗要高于低功耗接收机的功耗。对于同时具备传统接收机和低功耗接收机的第一设备,可以通过关闭传统接收机,开启低功耗接收机达到节能的效果。该第一设备可以通过低功耗接收机接收唤醒信号,通过唤醒信号触发开启传统接收机。唤醒信号可以是由第二设备发送的。
其中,包络检波可以是指将高频或中频的输入信号经过半波或者全波整流后得到低频原始信号的包络或者幅度线的一种信号检测方法。如此,第一设备以包括检波的方式接收信号之后可以得到原始信号 的包络。进而,第一设备可以对原始信号的包络进行数字采样,并与第一设备设置的幅度或者能量门限进行比较,判决接收的信号是1还是0。当然,第一设备还可以根据其它实现方式判决接收的信号是1还是0,本申请实施例对此不作具体限定。
应理解,第一设备支持反向散射通信可以是指第一设备支持在没有主动发射的射频链路的情况下可以向第二设备传递信息;或者,第一设备支持在自身具备主动发射的射频链路但不需要开启的情况下向第二设备传递信息。也就是说,第一设备此时主要依赖于第二设备之外的激励设备或第二设备发射的连续载波来进行调制。示例性的,第一设备可以通过调整第一设备的天线的阻抗来反射一部分或者全部入射的载波;或者,第一设备也可以通过调整第一设备的天线的阻抗来不反射入射的载波,或者吸收入射的载波的能量。如此,第一设备通过调节第一设备的天线的阻抗,可以实现将第一设备的数字信息调制到入射的载波上,并传递给第二设备。
可选地,对于本申请的所有实施例,第一设备支持的最大带宽受限。
可选地,一种可能的实现方式中,第一设备支持的最大上行带宽不超过X1。
示例性的,X1为20MHz,或者X1为5MHz,或者X1为3MHz,或者X1为1.4MHz,或者X1为1MHz,或者X1为720kHz,或者X1为540kHz,或者X1为360kHz,或者X1为180kHz。
或者,可选地,X1为K1个资源块,K1为正整数。
示例性的,K1为小于或等于11的正整数,或者K1为小于或等于25的正整数,或者K1为小于或等于51的正整数,或者K1为小于或等于106的正整数。
可选地,对于本申请的所有实施例,另一种可能的实现方式中,第一设备支持的最大下行带宽不超过Y1。
示例性的,Y1为20MHz,或者Y1为5MHz,或者Y1为3MHz,或者Y1为1.4MHz,或者Y1为1MHz,或者Y1为720kHz,或者Y1为540kHz,或者Y1为360kHz,或者Y1为180kHz。
或者,可选地,Y1为K2个资源块,K2为正整数。
示例性的,K2为小于或等于11的正整数,或者K2为小于或等于25的正整数,或者K2为小于或等于51的正整数,或者K2为小于或等于106的正整数。
可选地,对于本申请的所有实施例,第一设备支持的最大上行带宽小于或者等于第一设备支持的最大下行带宽。
可选地,对于本申请的所有实施例,第一设备支持的发送和/或接收天线数有限。
可选地,第一设备接收天线数不超过X2。其中,X2为1,或2,或4。
或者,可选地,第一设备的接收分支(Rx branch)数不超过X2,其中X2为1,或2,或4。
可选地,第一设备发送天线数不超过Y2。其中,Y2为1,或2,或4。
或者,可选地,第一设备的发送分支数不超过Y2。其中,Y2为1,或2,或4。
可选地,第一设备的发送天线数大于或等于第二设备的接收天线数。
或者,可选地,第一设备的发送分支数大于或等于第一设备的接收分支数。
需要说明的是,本申请实施例中,“接收分支”还可以称为“接收的射频通道数”,或者“接收的射频链(RF chain)数”。“发送分支”也可以称为“发送的射频通道数”,或者“发送的射频链数”。
需要说明的是,第一设备不可以在具有配对频谱(paired spectrum)的服务小区上同时发送和接收。
基于以上实施例,本申请实施例还提供了一种通信装置,参阅图11所示,通信装置1100可以包括收发单元1101和处理单元1102。其中,所述收发单元1101用于所述通信装置1100进行通信,例如接收信息、信号或数据,或发送信息、信号或数据,所述处理单元1102用于对所述通信装置1100的动作进行控制管理。所述处理单元1102还可以控制所述收发单元1101执行的步骤。
示例性地,该通信装置1100具体可以是下行数据的控制信息的接收装置,例如上述实施例中的第一设备、所述第一设备的处理器,或者芯片,或者芯片系统,或者是一个功能模块等。或者,该通信装置1100具体可以是下行数据的控制信息的发送装置,例如上述实施例中的第二设备、所述第二设备的处理器,或者芯片,或者芯片系统,或者是一个功能模块等。
在一个实施例中,所述通信装置1100用于实现上述实施例中第一设备的功能时,所述收发单元1101可以用于从第二设备接收同步信号,下行数据的控制信息的至少一项参数与所述同步信号相关,所述至少一项参数包括所述下行数据的控制信息的资源位置或所述下行数据的控制信息的第一参数,所述下行数据的控制信息用于调度所述下行数据;以及,根据所述下行数据的控制信息的所述至少一项参数从所 述第二设备接收所述下行数据的控制信息;以及,根据所述下行数据的控制信息从所述第二设备接收所述下行数据。所述处理单元1102可以控制所述收发单元1101的上述接收操作。
示例性的,所述同步信号包括以下一项或多项功能:自动增益控制AGC、时间同步、频率同步、数据包检测或边界检测。
其中,在时域上,所述同步信号位于所述下行数据的控制信息之前,所述下行数据的控制信息位于所述下行数据之前。
在一种可选的实施方式中,所述下行数据的控制信息的资源位置与所述同步信号相关,包括:所述下行数据的控制信息的时域位置基于所述同步信号的时域位置确定,和/或,所述下行数据的控制信息的频域位置基于所述同步信号的频域位置确定。
一种示例中,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置相邻;或者,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置之间间隔第一时间间隔;所述第一时间间隔为预设的,或者所述第一时间间隔为所述第二设备配置的,或者,所述第一时间间隔与所述同步信号的参数相关,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
一种示例中,所述下行数据的控制信息的频域资源的中心频点与所述同步信号的频域资源的中心频点相同,且所述下行数据的控制信息的带宽和所述同步信号的带宽不同;或者,所述下行数据的控制信息的频域资源和所述同步信号的频域资源相同;或者,所述下行数据的控制信息的起始频域位置与所述同步信号的结束频域位置之间间隔第一频域间隔;所述第一频域间隔为预设的,或者所述第一频域间隔为所述第二设备配置的,或者,所述第一频域间隔与所述同步信号的参数相关,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
一种可能的方式中,所述下行数据的控制信息的比特数小于X,所述下行数据的控制信息不使用循环冗余码校验码CRC,所述下行数据使用CRC,所述X为正整数;或者,所述下行数据的控制信息使用CRC,所述下行数据使用CRC,所述下行数据的控制信息使用的CRC对应的比特数为L1,所述下行数据使用的CRC对应的比特数为L2,所述L1和所述L2为不同的正整数。
可选的,所述L1为6,所述L2为16。
可选的,所述L1基于所述下行数据的控制信息的比特数确定。
示例性的,所述L1基于所述下行数据的控制信息的比特数确定,包括:当所述下行数据的控制信息的比特数小于或者等于第一值时,所述L1为6;当所述下行数据的控制信息的比特数大于所述第一值时,所述L1为11。
一种方式中,所述下行数据的控制信息和所述下行数据支持信道编码,且所述下行数据的控制信息和所述下行数据支持的信道编码类型相同。
进而,所述下行数据的控制信息中包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段。
在一种可选的实施方式中,所述下行数据的控制信息的第一参数与所述同步信号相关,包括:所述下行数据的控制信息的第一参数基于所述同步信号的参数确定;所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
示例性的,所述下行数据的控制信息的第一参数包括以下一项或多项:所述下行数据的控制信息的带宽、所述下行数据的控制信息的子载波间隔、所述下行数据的控制信息的循环前缀CP类型、所述下行数据的控制信息的线路码参数、所述下行数据的控制信息的信道编码参数、所述下行数据的控制信息的调制方式、所述下行数据的控制信息的重复次数、所述下行数据的控制信息的扩频因子、所述下行数据的控制信息的数据速率、所述下行数据的控制信息的时间长度、所述下行数据的控制信息的调制深度或所述下行数据的控制信息的占空比。
可选的,所述同步信号的覆盖等级与所述同步信号的参数对应,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
一种可能的方式中,所述下行数据的控制信息包括以下一项或多项:所述下行数据的带宽、所述下行数据的频域资源位置、所述下行数据的时间资源位置、所述下行数据的子载波间隔、所述下行数据的 CP类型、所述下行数据的线路码参数、所述下行数据的信道编码参数、所述下行数据的调制方式、所述下行数据的重复次数、所述下行数据的扩频因子、所述下行数据的数据速率、所述下行数据的时间长度、所述下行数据的调制深度、所述下行数据的占空比、所述下行数据的占用的时间单元数或所述下行数据的冗余版本。
其中,所述下行数据的控制信息中的第二参数的取值范围与所述同步信号的参数相关;所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子;所述下行数据的控制信息中的第二参数包括以下一项或多项:所述下行数据的重复次数、所述下行数据的调制方式、所述下行数据的信道编码参数或所述下行数据的线路码参数。
可选的,所述下行数据的控制信息通过第一索引指示所述下行数据的调制方式和所述下行数据的信道编码参数。
可选的,所述下行数据的控制信息包括第一指示信息和/或第二指示信息;所述第一指示信息用于指示所述下行数据是否启用信道编码;所述第二指示信息用于指示所述下行数据是否有结束符。
示例性的,当所述下行数据的控制信息指示所述下行数据启用信道编码时,所述下行数据的控制信息中包括用于确定所述下行数据的调制和编码方案MCS或所述下行数据的信道编码参数的信息;当所述下行数据的控制信息指示所述下行数据不启用信道编码时,所述下行数据的控制信息中包括用于确定所述下行数据的重复次数的信息。
一种示例中,所述用于确定所述下行数据的MCS或所述下行数据的信道编码参数的信息,与所述用于确定所述下行数据的重复次数的信息占用相同的比特。
可选的,当所述第二指示信息指示所述下行数据无结束符时,所述下行数据的控制信息中包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段;当所述第二指示信息指示所述下行数据有结束符时,所述下行数据的控制信息中包括用于指示所述下行数据的MCS的字段或用于指示所述下行数据的重复次数的字段。
一种可选的方式中,所述收发单元1101还可以用于从所述第二设备接收第一信息,所述第一信息用于指示所述下行数据之后的下行数据对应的同步信号的覆盖等级。
需要说明的是,除上述第一设备的功能外,本申请中涉及的所有实施例中的第一设备的收发操作均可以通过所述收发单元1101执行,以及,所述处理单元1102可以执行由第一设备执行的除收发操作以外的其他操作,具体可以参见上述方法实施例的相关描述,此处不再详细介绍。
在另一个实施例中,所述通信装置1100用于实现上述实施例中第一设备的功能时,所述收发单元1101可以用于向第一设备发送同步信号,下行数据的控制信息的至少一项参数与所述同步信号相关,所述至少一项参数包括所述下行数据的控制信息的资源位置或所述下行数据的控制信息的第一参数,所述下行数据的控制信息用于调度所述下行数据;以及,根据所述下行数据的控制信息的所述至少一项参数向所述第一设备发送所述下行数据的控制信息;以及根据所述下行数据的控制信息向所述第一设备发送所述下行数据。所述处理单元1102可以用于控制所述收发单元1101执行上述发送操作。
示例性的,所述同步信号包括以下一项或多项功能:自动增益控制AGC、时间同步、频率同步、数据包检测或边界检测。
其中,在时域上,所述同步信号位于所述下行数据的控制信息之前,所述下行数据的控制信息位于所述下行数据之前。
在一种可选的实施方式中,所述下行数据的控制信息的资源位置与所述同步信号相关,包括:所述下行数据的控制信息的时域位置基于所述同步信号的时域位置确定,和/或,所述下行数据的控制信息的频域位置基于所述同步信号的频域位置确定。
示例性的,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置相邻;或者,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置之间间隔第一时间间隔;所述第一时间间隔为预设的,或者所述第一时间间隔为所述第二设备配置的,或者,所述第一时间间隔与所述同步信号的参数相关,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
例如,所述下行数据的控制信息的频域资源的中心频点与所述同步信号的频域资源的中心频点相同,且所述下行数据的控制信息的带宽和所述同步信号的带宽不同;或者,所述下行数据的控制信息的频域资源和所述同步信号的频域资源相同;或者,所述下行数据的控制信息的起始频域位置与所述同步信号 的结束频域位置之间间隔第一频域间隔;所述第一频域间隔为预设的,或者所述第一频域间隔为所述第二设备配置的,或者,所述第一频域间隔与所述同步信号的参数相关,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
一种方式中,所述下行数据的控制信息的比特数小于X,所述下行数据的控制信息不使用循环冗余码校验码CRC,所述下行数据使用CRC,所述X为正整数;或者,所述下行数据的控制信息使用CRC,所述下行数据使用CRC,所述下行数据的控制信息使用的CRC对应的比特数为L1,所述下行数据使用的CRC对应的比特数为L2,所述L1和所述L2为不同的正整数。
可选的,所述L1为6,所述L2为16。
可选的,所述L1基于所述下行数据的控制信息的比特数确定,所述L2为16。
示例性的,所述L1基于所述下行数据的控制信息的比特数确定,包括:当所述下行数据的控制信息的比特数小于或者等于第一值时,所述L1为6;当所述下行数据的控制信息的比特数大于所述第一值时,所述L1为11。
一种可能的方式中,所述下行数据的控制信息和所述下行数据支持信道编码,且所述下行数据的控制信息和所述下行数据支持的信道编码类型相同。
其中,所述下行数据的控制信息中包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段。
在一种可选的实施方式中,所述下行数据的控制信息的第一参数与所述同步信号相关,包括:所述下行数据的控制信息的第一参数基于所述同步信号的参数确定;所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
例如,所述下行数据的控制信息的第一参数包括以下一项或多项:所述下行数据的控制信息的带宽、所述下行数据的控制信息的子载波间隔、所述下行数据的控制信息的循环前缀CP类型、所述下行数据的控制信息的线路码参数、所述下行数据的控制信息的信道编码参数、所述下行数据的控制信息的调制方式、所述下行数据的控制信息的重复次数、所述下行数据的控制信息的扩频因子、所述下行数据的控制信息的数据速率、所述下行数据的控制信息的时间长度、所述下行数据的控制信息的调制深度或所述下行数据的控制信息的占空比。
可选的,所述同步信号的覆盖等级与所述同步信号的参数对应,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
示例性的,所述下行数据的控制信息包括以下一项或多项:所述下行数据的带宽、所述下行数据的频域资源位置、所述下行数据的时间资源位置、所述下行数据的子载波间隔、所述下行数据的CP类型、所述下行数据的线路码参数、所述下行数据的信道编码参数、所述下行数据的调制方式、所述下行数据的重复次数、所述下行数据的扩频因子、所述下行数据的数据速率、所述下行数据的时间长度、所述下行数据的调制深度、所述下行数据的占空比、所述下行数据的占用的时间单元数或所述下行数据的冗余版本。
可选的,所述下行数据的控制信息中的第二参数的取值范围与所述同步信号的参数相关;所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子;所述下行数据的控制信息中的第二参数包括以下一项或多项:所述下行数据的重复次数、所述下行数据的调制方式、所述下行数据的信道编码参数或所述下行数据的线路码参数。
一种示例中,所述下行数据的控制信息通过第一索引指示所述下行数据的调制方式和所述下行数据的信道编码参数。
在一种可选的实施方式中,所述下行数据的控制信息包括第一指示信息和/或第二指示信息;所述第一指示信息用于指示所述下行数据是否启用信道编码;所述第二指示信息用于指示所述下行数据是否有结束符。
示例性的,当所述下行数据的控制信息指示所述下行数据启用信道编码时,所述下行数据的控制信息中包括用于确定下行数据的调制和编码方案MCS或信道编码参数的信息;当所述下行数据的控制信息指示所述下行数据不启用信道编码时,所述下行数据的控制信息中包括用于确定下行数据的重复次数 的信息。
可选的,所述用于确定下行数据的MCS或信道编码参数的信息,与所述用于确定下行数据的重复次数的信息占用相同的比特。
一种可能的方式,当所述第二指示信息指示所述下行数据无结束符时,所述下行数据的控制信息中包括用于指示下行数据的传输块大小的字段或用于指示下行数据的码块大小的字段;当所述第二指示信息指示所述下行数据有结束符时,所述下行数据的控制信息中包括用于指示下行数据的MCS的字段或用于指示下行数据的重复次数的字段。
可选的,所述处理单元1102还可以用于确定所述下行数据之后的下行数据对应的同步信号的覆盖等级需要更新;所述收发单元1101还可以用于向所述第一设备发送第一信息,所述第一信息用于指示所述下行数据之后的下行数据对应的同步信号的覆盖等级。
需要说明的是,除上述第二设备的功能外,本申请中涉及的所有实施例中的第二设备的收发操作均可以通过所述收发单元1101执行,以及,所述处理单元1102可以执行由第二设备执行的除收发操作以外的其他操作,具体可以参见上述方法实施例的相关描述,此处不再详细介绍。
需要说明的是,本申请实施例中对单元的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。在本申请的实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(read-only memory,ROM)、随机存取存储器(random access memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
基于以上实施例,本申请实施例还提供了一种通信装置,参阅图12所示,通信装置1200可以包括收发器1201和处理器1202。可选地,所述通信装置1200中还可以包括存储器1203。其中,所述存储器1203可以设置于所述通信装置1200内部,还可以设置于所述通信装置1200外部。其中,所述处理器1202可以控制所述收发器1201接收和发送报文、信息、消息或数据等。
具体地,所述处理器1202可以是中央处理器(central processing unit,CPU),网络处理器(network processor,NP)或者CPU和NP的组合。所述处理器1202还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit,ASIC),可编程逻辑器件(programmable logic device,PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device,CPLD),现场可编程逻辑门阵列(field-programmable gate array,FPGA),通用阵列逻辑(generic array logic,GAL)或其任意组合。
其中,所述收发器1201、所述处理器1202和所述存储器1203之间相互连接。可选地,所述收发器1201、所述处理器1202和所述存储器1203通过总线1204相互连接;所述总线1204可以是外设部件互连标准(Peripheral Component Interconnect,PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture,EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示,图12中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。
在一种可选地实施方式中,所述存储器1203,用于存放程序等。具体地,程序可以包括程序代码,该程序代码包括计算机操作指令。所述存储器1203可能包括RAM,也可能还包括非易失性存储器(non-volatile memory),例如一个或多个磁盘存储器。所述处理器1202执行所述存储器1203所存放的应用程序,实现上述功能,从而实现通信装置1200的功能。
示例性地,该通信装置1200可以是下行数据的控制信息的接收装置,例如上述实施例中的第一设备;还可以是下行数据的控制信息的发送装置,例如上述实施例中的第二设备。
在一个实施例中,所述通信装置1200在实现上述实施例中第一设备的功能时,收发器1201可以实现上述实施例中的由第一设备执行的收发操作;处理器1202可以实现上述实施例中由第一设备执行的除收发操作以外的其他操作。具体的相关具体描述可以参见上述所有方法实施例中的相关描述,此处不 再详细介绍。
在又一个实施例中,所述通信装置1200在实现上述实施例中第二设备的功能时,收发器1201可以实现上述实施例中的由第二设备执行的收发操作;处理器1202可以实现上述实施例中由第二设备执行的除收发操作以外的其他操作。具体的相关具体描述可以参见上述所有方法实施例中的相关描述,此处不再详细介绍。
基于以上实施例,本申请实施例提供了一种通信系统,该通信系统可以包括上述实施例涉及的第一设备和第二设备等。
本申请实施例还提供一种计算机可读存储介质,所述计算机可读存储介质用于存储计算机程序,该计算机程序被计算机执行时,所述计算机可以实现上述方法实施例提供的方法。
本申请实施例还提供一种计算机程序产品,所述计算机程序产品用于存储计算机程序,该计算机程序被计算机执行时,所述计算机可以实现上述方法实施例提供的方法。
本申请实施例还提供一种芯片,包括处理器,所述处理器与存储器耦合,用于调用所述存储器中的程序使得所述芯片实现上述方法实施例提供的方法。
本申请实施例还提供一种芯片,所述芯片与存储器耦合,所述芯片用于实现上述方法实施例提供的方法。
本领域内的技术人员应明白,本申请的实施例可提供为方法、系统、或计算机程序产品。因此,本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。

Claims (30)

  1. 一种下行数据的控制信息的接收方法,其特征在于,包括:
    第一设备从第二设备接收同步信号,下行数据的控制信息的至少一项参数与所述同步信号相关,所述至少一项参数包括所述下行数据的控制信息的资源位置或所述下行数据的控制信息的第一参数,所述下行数据的控制信息用于调度所述下行数据;
    所述第一设备根据所述下行数据的控制信息的所述至少一项参数从所述第二设备接收所述下行数据的控制信息;
    所述第一设备根据所述下行数据的控制信息从所述第二设备接收所述下行数据。
  2. 如权利要求1所述的方法,其特征在于,所述下行数据的控制信息的资源位置与所述同步信号相关,包括:
    所述下行数据的控制信息的时域位置基于所述同步信号的时域位置确定,和/或,所述下行数据的控制信息的频域位置基于所述同步信号的频域位置确定。
  3. 如权利要求2所述的方法,其特征在于,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置相邻;或者
    所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置之间间隔第一时间间隔;所述第一时间间隔为预设的,或者所述第一时间间隔为所述第二设备配置的,或者,所述第一时间间隔与所述同步信号的参数相关,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
  4. 如权利要求1-3任一项所述的方法,其特征在于,所述下行数据的控制信息的比特数小于X,所述下行数据的控制信息不使用循环冗余码校验码CRC,所述X为正整数;或者,
    所述下行数据的控制信息使用CRC,所述下行数据使用CRC,所述下行数据的控制信息使用的CRC对应的比特数为L1,所述下行数据使用的CRC对应的比特数为L2,所述L1和所述L2为不同的正整数。
  5. 如权利要求1-4任一项所述的方法,其特征在于,所述下行数据的控制信息的第一参数与所述同步信号相关,包括:
    所述下行数据的控制信息的第一参数基于所述同步信号的参数确定;
    所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
  6. 如权利要求1-5任一项所述的方法,其特征在于,所述下行数据的控制信息的第一参数包括以下一项或多项:所述下行数据的控制信息的带宽、所述下行数据的控制信息的子载波间隔、所述下行数据的控制信息的循环前缀CP类型、所述下行数据的控制信息的线路码参数、所述下行数据的控制信息的信道编码参数、所述下行数据的控制信息的调制方式、所述下行数据的控制信息的重复次数、所述下行数据的控制信息的扩频因子、所述下行数据的控制信息的数据速率、所述下行数据的控制信息的时间长度、所述下行数据的控制信息的调制深度或所述下行数据的控制信息的占空比。
  7. 如权利要求1-6任一项所述的方法,其特征在于,所述下行数据的控制信息包括以下一项或多项:所述下行数据的带宽、所述下行数据的频域资源位置、所述下行数据的时间资源位置、所述下行数据的子载波间隔、所述下行数据的CP类型、所述下行数据的线路码参数、所述下行数据的信道编码参数、所述下行数据的调制方式、所述下行数据的重复次数、所述下行数据的扩频因子、所述下行数据的数据速率、所述下行数据的时间长度、所述下行数据的调制深度、所述下行数据的占空比、所述下行数据的占用的时间单元数或所述下行数据的冗余版本。
  8. 如权利要求7所述的方法,其特征在于,所述下行数据的控制信息中的第二参数的取值范围与所述同步信号的参数相关;
    所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子;
    所述下行数据的控制信息中的第二参数包括以下一项或多项:所述下行数据的重复次数、所述下行数据的调制方式、所述下行数据的信道编码参数或所述下行数据的线路码参数。
  9. 一种下行数据的控制信息的发送方法,其特征在于,包括:
    第二设备向第一设备发送同步信号,下行数据的控制信息的至少一项参数与所述同步信号相关,所述至少一项参数包括所述下行数据的控制信息的资源位置或所述下行数据的控制信息的第一参数,所述下行数据的控制信息用于调度所述下行数据;
    所述第二设备根据所述下行数据的控制信息的所述至少一项参数向所述第一设备发送所述下行数据的控制信息;
    所述第二设备根据所述下行数据的控制信息向所述第一设备发送所述下行数据。
  10. 如权利要求9所述的方法,其特征在于,所述下行数据的控制信息的资源位置与所述同步信号相关,包括:
    所述下行数据的控制信息的时域位置基于所述同步信号的时域位置确定,和/或,所述下行数据的控制信息的频域位置基于所述同步信号的频域位置确定。
  11. 如权利要求10所述的方法,其特征在于,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置相邻;或者
    所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置之间间隔第一时间间隔;所述第一时间间隔为预设的,或者所述第一时间间隔为所述第二设备配置的,或者,所述第一时间间隔与所述同步信号的参数相关,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
  12. 如权利要求9-11任一项所述的方法,其特征在于,所述下行数据的控制信息的比特数小于X,所述下行数据的控制信息不使用循环冗余码校验码CRC,所述X为正整数;或者
    所述下行数据的控制信息使用CRC,所述下行数据使用CRC,所述下行数据的控制信息使用的CRC对应的比特数为L1,所述下行数据使用的CRC对应的比特数为L2,所述L1和所述L2为不同的正整数。
  13. 如权利要求9-12任一项所述的方法,其特征在于,所述下行数据的控制信息的第一参数与所述同步信号相关,包括:
    所述下行数据的控制信息的第一参数基于所述同步信号的参数确定;
    所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
  14. 如权利要求9-13任一项所述的方法,其特征在于,所述下行数据的控制信息的第一参数包括以下一项或多项:所述下行数据的控制信息的带宽、所述下行数据的控制信息的子载波间隔、所述下行数据的控制信息的循环前缀CP类型、所述下行数据的控制信息的线路码参数、所述下行数据的控制信息的信道编码参数、所述下行数据的控制信息的调制方式、所述下行数据的控制信息的重复次数、所述下行数据的控制信息的扩频因子、所述下行数据的控制信息的数据速率、所述下行数据的控制信息的时间长度、所述下行数据的控制信息的调制深度或所述下行数据的控制信息的占空比。
  15. 如权利要求9-14任一项所述的方法,其特征在于,所述下行数据的控制信息包括以下一项或多项:所述下行数据的带宽、所述下行数据的频域资源位置、所述下行数据的时间资源位置、所述下行数据的子载波间隔、所述下行数据的CP类型、所述下行数据的线路码参数、所述下行数据的信道编码参数、所述下行数据的调制方式、所述下行数据的重复次数、所述下行数据的扩频因子、所述下行数据的数据速率、所述下行数据的时间长度、所述下行数据的调制深度、所述下行数据的占空比、所述下行数据的占用的时间单元数或所述下行数据的冗余版本。
  16. 如权利要求15所述的方法,其特征在于,所述下行数据的控制信息中的第二参数的取值范围与所述同步信号的参数相关;
    所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子;
    所述下行数据的控制信息中的第二参数包括以下一项或多项:所述下行数据的重复次数、所述下行数据的调制方式、所述下行数据的信道编码参数或所述下行数据的线路码参数。
  17. 一种下行数据的控制信息的接收、发送方法,其特征在于,包括:
    第二设备向第一设备发送同步信号,下行数据的控制信息的至少一项参数与所述同步信号相关,所述至少一项参数包括所述下行数据的控制信息的资源位置或所述下行数据的控制信息的第一参数,所述 下行数据的控制信息用于调度所述下行数据;
    所述第一设备从所述第二设备接收所述同步信号;
    所述第二设备根据所述下行数据的控制信息的所述至少一项参数向所述第一设备发送所述下行数据的控制信息;
    所述第一设备根据所述下行数据的控制信息的所述至少一项参数从所述第二设备接收所述下行数据的控制信息;
    所述第二设备根据所述下行数据的控制信息向所述第一设备发送所述下行数据;
    所述第一设备根据所述下行数据的控制信息从所述第二设备接收所述下行数据。
  18. 如权利要求17所述的方法,其特征在于,所述下行数据的控制信息的资源位置与所述同步信号相关,包括:
    所述下行数据的控制信息的时域位置基于所述同步信号的时域位置确定,和/或,所述下行数据的控制信息的频域位置基于所述同步信号的频域位置确定。
  19. 如权利要求18所述的方法,其特征在于,所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置相邻;或者
    所述下行数据的控制信息的起始时域位置与所述同步信号的结束时域位置之间间隔第一时间间隔;所述第一时间间隔为预设的,或者所述第一时间间隔为所述第二设备配置的,或者,所述第一时间间隔与所述同步信号的参数相关,所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
  20. 如权利要求17-19任一项所述的方法,其特征在于,所述下行数据的控制信息的比特数小于X,所述下行数据的控制信息不使用循环冗余码校验码CRC,所述X为正整数;或者,
    所述下行数据的控制信息使用CRC,所述下行数据使用CRC,所述下行数据的控制信息使用的CRC对应的比特数为L1,所述下行数据使用的CRC对应的比特数为L2,所述L1和所述L2为不同的正整数。
  21. 如权利要求17-20任一项所述的方法,其特征在于,所述下行数据的控制信息的第一参数与所述同步信号相关,包括:
    所述下行数据的控制信息的第一参数基于所述同步信号的参数确定;
    所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子。
  22. 如权利要求17-21任一项所述的方法,其特征在于,所述下行数据的控制信息的第一参数包括以下一项或多项:所述下行数据的控制信息的带宽、所述下行数据的控制信息的子载波间隔、所述下行数据的控制信息的循环前缀CP类型、所述下行数据的控制信息的线路码参数、所述下行数据的控制信息的信道编码参数、所述下行数据的控制信息的调制方式、所述下行数据的控制信息的重复次数、所述下行数据的控制信息的扩频因子、所述下行数据的控制信息的数据速率、所述下行数据的控制信息的时间长度、所述下行数据的控制信息的调制深度或所述下行数据的控制信息的占空比。
  23. 如权利要求17-22任一项所述的方法,其特征在于,所述下行数据的控制信息包括以下一项或多项:所述下行数据的带宽、所述下行数据的频域资源位置、所述下行数据的时间资源位置、所述下行数据的子载波间隔、所述下行数据的CP类型、所述下行数据的线路码参数、所述下行数据的信道编码参数、所述下行数据的调制方式、所述下行数据的重复次数、所述下行数据的扩频因子、所述下行数据的数据速率、所述下行数据的时间长度、所述下行数据的调制深度、所述下行数据的占空比、所述下行数据的占用的时间单元数或所述下行数据的冗余版本。
  24. 如权利要求23所述的方法,其特征在于,所述下行数据的控制信息中的第二参数的取值范围与所述同步信号的参数相关;
    所述同步信号的参数包括以下一项或多项:所述同步信号的序列、所述同步信号的长度、所述同步信号的重复次数或所述同步信号的扩频因子;
    所述下行数据的控制信息中的第二参数包括以下一项或多项:所述下行数据的重复次数、所述下行数据的调制方式、所述下行数据的信道编码参数或所述下行数据的线路码参数。
  25. 一种下行数据的控制信息的接收装置,其特征在于,包括存储器、处理器和收发器,其中:
    所述收发器,用于所述通信装置进行通信;
    所述存储器,用于存储计算机指令;
    所述处理器,用于调用所述存储器中的计算机指令,以通过所述收发器执行如权利要求1-8任一项所述的方法。
  26. 一种下行数据的控制信息的发送装置,其特征在于,包括存储器、处理器和收发器,其中:
    所述收发器,用于所述通信装置进行通信;
    所述存储器,用于存储计算机指令;
    所述处理器,用于调用所述存储器中的计算机指令,以通过所述收发器执行如权利要求9-16任一项所述的方法。
  27. 一种通信系统,其特征在于,包括如权利要求25所述的下行数据的控制信息的接收装置,以及如权利要求26所述的下行数据的控制信息的发送装置。
  28. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中存储有计算机可执行指令,所述计算机可执行指令在被所述计算机调用时以执行如权利要求1-8中任一项所述的方法,或者执行如权利要求9-16中任一项所述的方法。
  29. 一种计算机程序产品,其特征在于,包含指令,当所述指令在计算机上运行时,使得如权利要求1-8中任一项所述的方法,或者如权利要求9-16中任一项所述的方法。
  30. 一种芯片,其特征在于,所述芯片与存储器耦合,用于读取并执行所述存储器中存储的程序指令,以实现如权利要求1-8中任一项所述的方法,或者实现如权利要求9-16中任一项所述的方法。
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