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 PDFInfo
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- 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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- downlink data
- control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0028—Formatting
- H04L1/0031—Multiple signaling transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
- H04L5/0094—Indication of how sub-channels of the path are allocated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements 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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1864—ARQ related signaling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements 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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1896—ARQ related signaling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation 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
Description
Claims (30)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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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| CN117460059A (zh) | 2024-01-26 |
| EP4543121A1 (en) | 2025-04-23 |
| US20250151061A1 (en) | 2025-05-08 |
| EP4543121A4 (en) | 2025-11-12 |
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