WO2020143617A1 - Procédé de transmission de canal de commande de liaison descendante, terminal et dispositif côté réseau - Google Patents

Procédé de transmission de canal de commande de liaison descendante, terminal et dispositif côté réseau Download PDF

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Publication number
WO2020143617A1
WO2020143617A1 PCT/CN2020/070667 CN2020070667W WO2020143617A1 WO 2020143617 A1 WO2020143617 A1 WO 2020143617A1 CN 2020070667 W CN2020070667 W CN 2020070667W WO 2020143617 A1 WO2020143617 A1 WO 2020143617A1
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WIPO (PCT)
Prior art keywords
downlink control
control channel
indication information
terminal
indicate
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PCT/CN2020/070667
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English (en)
Chinese (zh)
Inventor
王磊
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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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
    • H04L1/189—Transmission or retransmission of more than one copy of a message
    • 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
    • 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

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a downlink control channel transmission method, terminal, and network side device.
  • the business of communication systems requires higher and higher reliability, for example: Ultra-Reliable Low-Latency Communications (URLLC) services require extremely high reliability .
  • URLLC Ultra-Reliable Low-Latency Communications
  • the current communication system often supports a single transmission of the downlink control channel and cannot support the repeated transmission of the downlink control channel, thereby making the transmission reliability of the communication system relatively poor.
  • Some embodiments of the present disclosure provide a downlink control channel transmission method, terminal, and network side device to solve the problem of poor transmission reliability caused by the communication system not supporting repeated transmission of the downlink control channel.
  • Some embodiments of the present disclosure provide a downlink control channel transmission method, including:
  • the terminal receives indication information sent by the network side device, where the indication information is used to indicate the number of repeated transmissions of the downlink control channel, and/or is used to indicate whether to enable the repeated transmission mode of the downlink control channel;
  • the terminal receives the downlink control channel according to the instruction information.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • DCI Format Downlink Control Information
  • RRC Radio Resource Control
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the terminal receiving the downlink control channel according to the instruction information includes:
  • the terminal receives the downlink control channel according to the instruction information of the terminal.
  • the indication information of the terminal is used to indicate: the number of repeated transmissions of the downlink control channel, and/or whether to enable the repeated transmission mode of the downlink control channel;
  • the indication information of the terminal is also used to indicate:
  • the number of repeated transmissions and/or whether the repetitive transmission mode of turning on the downlink control channel is valid during the transmission period of the group of common downlink control channels, or the number of repetitive transmissions and/or whether the downlink control channel is turned on
  • the effective repetitive transmission mode is terminated the next time the terminal successfully receives the group common downlink control channel.
  • the frequency domain resource allocation (Frequency Domain Resource Allocation, FDRA) domain of the DCI is all 1, and the specific bit bits are N bits that are not utilized or reserved in the DCI, where the N It is an integer greater than or equal to 1.
  • the first part of the specific bit is used to indicate that the DCI is used for non-contention random access (Contention Free Random Access, CFRA) scheduling or For the repeated transmission indication of the downlink control channel or for other types of uses;
  • CFRA Contention Free Random Access
  • the second part of the specific bit is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel.
  • the first partial bit is the first H bits of the specific bit
  • the second partial bit is one or more bits of the specific bit except the first H bits
  • the H is an integer less than the N.
  • the second part of the bit is also used to indicate:
  • the number of repeated transmissions and/or whether the effective time of the repeated transmission mode of the downlink control channel is enabled is enabled.
  • the DCI format is a DCI format used for data scheduling or a DCI format used for fallback downlink scheduling.
  • the number of repeated transmissions of the downlink control channel is a subset of the set of repetitions, where the set of repetitions is predefined by the protocol or configured by high-level signaling.
  • the number of repeated transmissions in the repeated transmission mode is predefined by the protocol or configured by high-level signaling; and/or
  • the number of repeated transmissions and/or the validity period of whether to enable the repeated transmission mode of the downlink control channel is pre-defined by high-level signaling configuration or protocol.
  • Some embodiments of the present disclosure also provide a downlink control channel transmission method, including:
  • the network side device sends indication information to the terminal, where the indication information is used to indicate the number of repeated transmissions of the downlink control channel, and/or is used to indicate whether to enable the repeated transmission mode of the downlink control channel;
  • the network side device sends the downlink control channel according to the instruction information.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the network side device sending the downlink control channel according to the instruction information includes:
  • the network side device sends the downlink control channel of the terminal according to the instruction information of the terminal.
  • the indication information of the terminal is used to indicate: the number of repeated transmissions of the downlink control channel, and/or whether to enable the repeated transmission mode of the downlink control channel;
  • the indication information of the terminal is used to indicate that it is also used to indicate:
  • the number of repeated transmissions and/or whether the repeated transmission mode of turning on the downlink control channel is valid within the transmission period of the group of common downlink control channels, or, the number of repeated transmissions and/or whether the downlink control channel is turned on
  • the effective repetitive transmission mode is terminated the next time the terminal successfully receives the group common downlink control channel.
  • the FDRA field of the DCI is all 1, and the specific bit bits are unused or reserved N bits in the DCI, where the N is an integer greater than or equal to 1.
  • the first part of the specific bit is used to indicate that the DCI is used for CFRA scheduling or for a repeated transmission indication of the downlink control channel or For other types of uses;
  • the second part of the specific bit is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel.
  • the first partial bit is the first H bits of the specific bit
  • the second partial bit is one or more bits of the specific bit except the first H bits
  • the H is an integer less than the N.
  • the second part of the bit is also used to indicate:
  • the number of repeated transmissions and/or whether the effective time of the repeated transmission mode of the downlink control channel is enabled is enabled.
  • the DCI format is a DCI format used for data scheduling or a DCI format used for fallback downlink scheduling.
  • the number of repeated transmissions of the downlink control channel is a subset of the set of repetitions, where the set of repetitions is predefined by the protocol or configured by high-level signaling.
  • the number of repeated transmissions in the repeated transmission mode is predefined by the protocol or configured by high-level signaling; and/or
  • the number of repeated transmissions and/or the validity period of whether to enable the repeated transmission mode of the downlink control channel is pre-defined by high-level signaling configuration or protocol.
  • Some embodiments of the present disclosure also provide a terminal, including:
  • the first receiving module is used to receive indication information sent by the network side device, the indication information is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel;
  • the second receiving module is configured to receive the downlink control channel according to the instruction information.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the second receiving module is configured to receive the downlink control channel according to the instruction information of the terminal.
  • Some embodiments of the present disclosure also provide a network-side device, including:
  • the first sending module is used to send instruction information to the terminal, where the instruction information is used to indicate the number of repeated transmissions of the downlink control channel, and/or to indicate whether to enable the repeated transmission mode of the downlink control channel;
  • the second sending module is configured to send the downlink control channel according to the instruction information.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the second sending module is configured to send the downlink control channel of the terminal according to the instruction information of the terminal.
  • Some embodiments of the present disclosure also provide a terminal, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein,
  • the transceiver is used to receive indication information sent by the network side device, the indication information is used to indicate the number of repeated transmissions of the downlink control channel, and/or is used to indicate whether to enable the repeated transmission mode of the downlink control channel;
  • the transceiver is further configured to receive the downlink control channel according to the instruction information.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the receiving of the downlink control channel according to the instruction information performed by the transceiver includes:
  • Some embodiments of the present disclosure also provide a network-side device, including:
  • a transceiver a memory, a processor, and a program stored on the memory and executable on the processor, wherein,
  • the transceiver is used to send indication information to the terminal, the indication information is used to indicate the number of repeated transmissions of the downlink control channel, and/or is used to indicate whether to enable the repeated transmission mode of the downlink control channel;
  • the transceiver is further configured to send the downlink control channel according to the instruction information.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the downlink control channel transmission performed by the transceiver according to the instruction information includes:
  • the transceiver transmits the downlink control channel of the terminal according to the instruction information of the terminal.
  • Some embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the downlink control channel transmission method on the terminal side provided by some embodiments of the present disclosure , Or when the program is executed by the processor, the steps in the method for transmitting the downlink control channel on the network side device side provided by some embodiments of the present disclosure are implemented.
  • the terminal receives indication information sent by the network side device, where the indication information is used to indicate the number of repeated transmissions of the downlink control channel, and/or is used to indicate whether to enable the repeated transmission mode of the downlink control channel
  • the terminal receives the downlink control channel according to the instruction information.
  • the indication information sent by the network side device can control the number of repeated transmissions and/or the repeated transmission mode of the downlink control channel, so as to improve the transmission reliability of the downlink control channel.
  • FIG. 1 is a flowchart of a downlink control channel transmission method provided by some embodiments of the present disclosure
  • group common PDCCH group common PDCCH
  • FIG. 4 is a structural diagram of a terminal provided by some embodiments of the present disclosure.
  • FIG. 5 is a structural diagram of a network-side device provided by some embodiments of the present disclosure.
  • FIG. 6 is a structural diagram of another terminal provided by some embodiments of the present disclosure.
  • FIG. 7 is a structural diagram of another network-side device provided by some embodiments of the present disclosure.
  • FIG. 1 is a flowchart of a downlink control channel transmission method provided by some embodiments of the present disclosure. As shown in FIG. 1, the method includes the following steps:
  • the terminal receives indication information sent by the network side device, where the indication information is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel.
  • the terminal receives the downlink control channel according to the instruction information.
  • the above indication information can indicate whether to enable the repeated transmission mode of the physical downlink control channel (Physical Downlink Control Channel, PDCCH) through 1 bit, for example, 1 means to enable repeated transmission, and 0 means to disable repeated transmission.
  • PDCCH Physical Downlink Control Channel
  • the above indication information may indicate the number of repeated transmissions through one or more bits, for example, using 2 bits to indicate that the number of repetitions of the downlink control channel is 0, 1, 2, or 4.
  • the terminal when receiving the indication information, may determine the number of transmissions of the downlink control channel according to the indication of the indication information, or determine whether to enable the repeated transmission mode of the downlink control channel.
  • the repeated transmission mode When the repeated transmission mode is turned on, the downlink control channel can be repeatedly transmitted, otherwise only one transmission is performed.
  • the number of repeated transmissions of the downlink control channel may be the number of repeated transmissions indicated by the indication information.
  • the indication information only indicates to enable the repeated transmission mode of the downlink control channel, but does not indicate the repeated transmission times
  • the repeated transmission times of the downlink control channel may be the default or preset repeated transmission times .
  • the terminal may combine and receive the same message repeatedly transmitted on the downlink control channel according to the instruction information, so as to prevent the terminal from receiving the same message repeatedly transmitted multiple times And merge. It can be seen from this that the terminal can reduce the complexity of receiving the downlink control channel according to the instruction information. Of course, there is no limitation on this. For example, in the case of indicating that the number of repeated transmissions is multiple, or the repeated transmission mode in which the downlink control channel is turned on, the terminal may first try to separately receive each downlink control channel, and if not successful, further Combine decoding for multiple transmissions.
  • the indication information includes:
  • the indication information carried by the group common downlink control channel;
  • the indication information is carried through the group of common downlink control channels, the indication information is carried in the MAC CE, or the indication information is carried in RRC signaling, which can improve the flexibility of the indication information.
  • the indication information may also be transmitted to the terminal in other forms, which is not limited herein.
  • the network side device may notify the terminal of the number of repeated transmissions of the downlink control channel through the above indication information carried in the MAC CE.
  • the terminal can perform combined reception of the downlink control channel according to the instruction information carried in the MAC CE.
  • the network side device may also configure the downlink control channel repeated transmission indication information for the terminal through RRC signaling.
  • the number of repeated transmissions of the downlink control channel of the terminal is configured by RRC signaling to K times.
  • the terminal After receiving the high-level signaling, the terminal may perform combined reception of K times of downlink control channel transmission.
  • this does not limit some embodiments of the present disclosure.
  • the terminal may first try to receive each downlink control channel transmission separately, and if unsuccessful, further merge and decode multiple downlink control channel transmissions.
  • the group common downlink control channel is a group common physical downlink control channel (group common PDCCH).
  • group common PDCCH group common physical downlink control channel
  • the indication information carried by the group of common downlink control channels may be valid for a group of terminals, and each terminal in the group of terminals receives the downlink control channel according to the indication information.
  • Embodiment 3 The DCI carried in the group common PDCCH contains activation/deactivation information of repeated transmission of downlink control channels of multiple terminals (that is, whether to enable the repeated transmission mode of the downlink control channel). Indicate whether the terminal has enabled the repeated transmission mode of the downlink control channel. Specifically, for example, when the 1-bit indication field is equal to 1, it indicates that the repeated transmission mode of the downlink control channel is turned on, and when it is equal to 0, it indicates that the repeated transmission mode of the downlink control channel is turned off.
  • the number of repeated transmissions of the downlink control channel (here, the number of repeated transmissions is equal to H times as an example) can be configured through high-level signaling or defined through a protocol. If the repeat transmission mode of the downlink control channel is enabled, the base station will repeatedly transmit the downlink control channel H times, and the terminal will receive the downlink control channel H times in combination; otherwise, the downlink control channel will only be sent once.
  • the group of common downlink control channels carries indication information including at least one terminal within the terminal;
  • the terminal receiving the downlink control channel according to the instruction information includes:
  • the terminal receives the downlink control channel according to the instruction information of the terminal.
  • the group of common downlink control channels may carry indication information of multiple terminals, and the indication information of different terminals may be the same or different, which is not limited.
  • Each terminal may separately obtain corresponding indication information to determine the number of repeated transmissions of the downlink control channel and/or whether to enable the repeated transmission mode, and perform the repeated transmission of the downlink control channel according to the determined situation of the repeated transmission of the downlink control channel.
  • the indication information of the terminal may be used to indicate: the number of repeated transmissions of the downlink control channel, and/or whether to enable the repeated transmission mode of the downlink control channel;
  • the indication information of the terminal may also be used to indicate:
  • the number of repeated transmissions and/or whether the repetitive transmission mode of turning on the downlink control channel is valid during the transmission period of the group of common downlink control channels, or the number of repetitive transmissions and/or whether the downlink control channel is turned on
  • the effective repetitive transmission mode is terminated the next time the terminal successfully receives the group common downlink control channel.
  • valid in the transmission period it may mean that the terminal determines the number of repeated transmissions of the downlink control channel and/or whether to turn on the downlink according to the indication information only during the transmission period of the group of common downlink control channels In the repeated transmission mode of the control channel, after the transmission period of the group of common downlink control channels is exceeded, the default repeated transmission mode of the downlink control channel can be restored or the repeated transmission mode of the downlink control channel can be turned off.
  • the termination of the next successful reception of the group common downlink control channel may refer to the determination of the downlink control according to the indication information carried by the group common downlink control channel before the terminal successfully receives the group common downlink control channel the next time The number of repeated transmissions of the channel and/or whether to enable the repeated transmission mode of the downlink control channel.
  • the number of repeated transmissions of the downlink control channel and/or whether to enable the repeated transmission mode of the downlink control channel can be determined according to the indication information carried by the group of common downlink control channels. Use the indication information carried by the group of common downlink control channels to timely modify the repeated transmission state of the terminal to the downlink control channel.
  • the timeliness of the indication information can be controlled, and the state in which the terminal repeatedly transmits the downlink control channel can be changed in time to improve the timeliness of the indication information.
  • the DCI frequency domain resource allocation FDRA domain is all 1, and the specific bit is N bits that are not utilized or reserved in the DCI, where N is greater than Or an integer equal to 1.
  • all the FDRA fields are 1 can indicate that the FDRA field is not used, or that the specific bit indicates that the indication information is indicated, so that when the terminal resolves that the FDRA field is all 1, it can be based on the specific bit Bit determines the above instructions.
  • FDRA field may also be other numerical values, etc., which is not specifically limited here.
  • the N bits may determine the status of the repeated transmission indicated by the N bits through protocol presets and high-level signaling instructions.
  • N when N is equal to 1, it can be determined by the protocol preset that when the content of 1 bit is equal to 1, it means that the repeat transmission mode of the downlink control channel is turned on; when the content of the 1 bit is equal to 0, it means that the downlink is turned off Repeat transmission mode of the control channel.
  • N is an integer greater than 1, the first part of the specific bit is used to indicate that the DCI is used for CFRA scheduling or for the repeated transmission indication of the downlink control channel or used For other types of uses;
  • the second part of the specific bit is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel.
  • the above-mentioned other types of uses may indicate uses other than the above-mentioned CFRA scheduling and downlink control channel repetitive transmission instructions, for example: scheduling for other uses, etc., which are not limited, that is, the first part above
  • the bit is not limited to distinguish between the above-mentioned CFRA scheduling or the repeated transmission indication of the downlink control channel.
  • the functions of the DCI can be distinguished by the first part of bits, and avoid mixing with the existing functions scheduled by the CFRA.
  • the first partial bit is the first H bits of the specific bit
  • the second partial bit is one or more bits of the specific bit except the first H bits
  • the H is an integer less than the N.
  • first partial bit may also be set to the last H bits of the specific bit
  • second partial bit may be one or more of the specific bit except the last H bits bit, not limited here.
  • the second part of the bit is also used to indicate:
  • the number of repeated transmissions and/or whether the effective time of the repeated transmission mode of the downlink control channel is enabled is enabled.
  • the effective time may be a specific length of time, for example, duration, or may be invalid when the DCI format is successfully received next time, so as to improve the timeliness of the indication information carried by the DCI format.
  • the DCI format is a DCI format used for data scheduling or a DCI format used for fallback downlink scheduling.
  • the DCI format of the data scheduling may be DCI format 1-0 or the DCI format defined in other communication systems.
  • the DCI format of the fallback downlink scheduling may be a DCI format newly introduced in some embodiments of the present disclosure, or a DCI format defined in a future communication system (for example, a 5G communication system, etc.) used for fallback downlink scheduling to improve the DCI Scope of format.
  • the DCI format used for data scheduling or the DCI format used for fallback downlink scheduling can also be scrambled by a cell radio network temporary identifier (Cell Radio Network Temporary Identifier, C-RNTI).
  • C-RNTI Cell Radio Network Temporary Identifier
  • Embodiment 4 The network-side device indicates whether to enable the repeated transmission mode of the downlink control channel through DCI format 1-0, and notifies the number of repeated transmissions.
  • the network side device sends the downlink control channel according to the indication information in DCI format 1-0.
  • the FDRA field in the DCI format 1-0 is all 1, and scrambling is performed through the C-RNTI corresponding to the terminal.
  • the unused bits of the last N bits carried in the DCI that is, reserved bits, and carry at least the following two types of information:
  • DCI type indication information used to distinguish whether the DCI is used for CFRA scheduling or PDCCH repetition mode indication
  • the duration of the number of repeated transmissions of the downlink control channel is the duration of the number of repeated transmissions of the downlink control channel.
  • the aforementioned R may be equal to the aforementioned N.
  • DCI format 1-0 does not include an indication field indicating the duration of repeated transmission of the downlink control channel. After detecting that the DCI format 1-0 is received in the search space, the terminal parses the bit field in it.
  • the FDRA field is found to be all 1, then the first information field in the 10 bits after analysis, that is, in the R bits
  • the first H bits of the bit if the bit field status is 0, it means that the DCI is used for CFRA, and the CFRA related information is obtained according to the CFRA analysis method; if the bit field status is 1, it means that the DCI is used to indicate the Repeat transmission mode of the downlink control channel of the terminal, and further analyze the information field composed of the second and third bits in the last 10 bits to determine the number of repeated transmission of the downlink control channel.
  • the number of repeated transmissions is determined according to Table 2 below:
  • bit field and the number of repetitions corresponding to each state are not limited here.
  • the correspondence between the bit field and the number of repeated transmissions in Table 2 can be defined in a manner predefined by the protocol, and can also be configured through RRC signaling. If the configuration is performed through high-level signaling, any corresponding relationship different from the above table may be configured through high-level signaling.
  • the number of repeated transmissions of the downlink control channel is a subset of the set of repetitions, where the set of repetitions is pre-defined by the protocol or configured by high-level signaling.
  • the set of repetition numbers may include various situations of the number of repeated transmissions of the downlink control channel, for example, the set of repetition numbers includes 4 subsets: 0 repetitions, 1 repetition, 2 repetitions, and 4 repetitions Wait.
  • the number of repeated transmissions of the downlink control channel by any terminal may be any of the four types of repetitions, that is, a subset of the set of repetitions.
  • the set of repetition times may also include other repetition times, and the set of repetition times may also be expressed in other forms than numbers, which is not limited herein.
  • a subset of the number of repetitions can be selected as the number of repetitions of the downlink control channel from a plurality of repetitions predefined in the protocol or configured by high-level signaling, reducing the complexity of the process of determining the number of repetitions of the downlink control channel, and also The overhead can be reduced because the above-mentioned indication information may be an index of the above-mentioned set of repetition times.
  • the number of repeated transmissions in the repeated transmission mode is predefined by the protocol or configured by high-level signaling.
  • the number of repetitive transmissions of the repetitive transmission mode can be set in a manner predefined by a protocol or configured by high-level signaling, so as to expand the selection range of the number of repetitive transmissions.
  • the number of repeated transmissions and/or whether the validity period of the repeated transmission mode of the downlink control channel is enabled is configured by high-layer signaling or predefined by the protocol.
  • the validity period may include at least one of the number of repeated transmissions and/or whether the repeated transmission mode of the downlink control channel is effective, invalid and effective.
  • the validity period of the indication message can be set through a high-level signaling configuration or a protocol pre-defined manner to improve the timeliness of the indication message.
  • the terminal receives indication information sent by the network side device, where the indication information is used to indicate the number of repeated transmissions of the downlink control channel, and/or is used to indicate whether to enable the repeated transmission mode of the downlink control channel
  • the terminal receives the downlink control channel according to the instruction information.
  • the indication information sent by the network side device can control the number of repeated transmissions and/or the repeated transmission mode of the downlink control channel, so as to improve the transmission reliability of the downlink control channel.
  • FIG. 2 is a flowchart of another downlink control channel transmission method provided by some embodiments of the present disclosure. As shown in FIG. 2, the method includes the following steps:
  • the network side device sends instruction information to the terminal, where the instruction information is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel.
  • the network side device sends the downlink control channel according to the instruction information.
  • the instruction information is the same as the instruction message received by the terminal in the method embodiment shown in FIG. 1.
  • the network-side device may repeatedly send the data scheduling message of the downlink control channel according to the number of repetitions of the downlink control channel .
  • the indication of the indication message is used to determine the number of repeated transmissions in the downlink control channel transmission process by the network side device, so as to improve the reliability of the downlink control channel.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • RRC signaling The indication information carried by RRC signaling (RRC signaling).
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the network side device sending the downlink control channel according to the instruction information includes:
  • the network side device sends the downlink control channel of the terminal according to the instruction information of the terminal.
  • the indication information of the terminal is used to indicate: the number of repeated transmissions of the downlink control channel, and/or whether to enable the repeated transmission mode of the downlink control channel;
  • the indication information of the terminal is used to indicate that it is also used to indicate:
  • the number of repeated transmissions and/or whether the repetitive transmission mode of turning on the downlink control channel is valid during the transmission period of the group of common downlink control channels, or the number of repetitive transmissions and/or whether the downlink control channel is turned on
  • the effective repetitive transmission mode is terminated the next time the terminal successfully receives the group common downlink control channel.
  • the FDRA field of the DCI is all 1, and the specific bit bits are unused or reserved N bits in the DCI, where the N is an integer greater than or equal to 1.
  • the first part of the specific bit is used to indicate that the DCI is used for CFRA scheduling or for a repeated transmission indication of the downlink control channel or For other types of uses;
  • the second part of the specific bit is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel.
  • the first partial bit is the first H bits of the specific bit
  • the second partial bit is one or more bits of the specific bit except the first H bits
  • the H is an integer less than the N.
  • the second part of the bit is also used to indicate:
  • the number of repeated transmissions and/or whether the effective time of the repeated transmission mode of the downlink control channel is enabled is enabled.
  • the DCI format is a DCI format used for data scheduling or a DCI format used for fallback downlink scheduling.
  • the number of repeated transmissions of the downlink control channel is a subset of the set of repetitions, where the set of repetitions is predefined by the protocol or configured by high-level signaling.
  • the number of repeated transmissions in the repeated transmission mode is predefined by the protocol or configured by high-level signaling; and/or
  • the number of repeated transmissions and/or the validity period of whether to enable the repeated transmission mode of the downlink control channel is pre-defined by high-level signaling configuration or protocol.
  • this embodiment is an implementation of the network-side device corresponding to the embodiment shown in FIG. 1.
  • the relevant description of the embodiment shown in FIG. 2. This embodiment will not go into details, and the same beneficial effects can also be achieved.
  • the transmission method of the downlink control channel will be exemplified below with reference to the steps performed by the terminal and the network side device.
  • UE A is a vehicle-to-everything (V2X) terminal, power grid terminal or AR/VR (virtual reality/ Augmented reality) terminal etc.
  • V2X vehicle-to-everything
  • AR/VR virtual reality/ Augmented reality
  • the base station instructs the data of multiple terminals to schedule the number of repeated transmissions of the downlink control channel through the DCI carried on the group common downlink control channel (group common PDCCH).
  • group common PDCCH group common downlink control channel
  • the DCI contains N information domains (that is, N indication information), each information domain corresponds to one or more terminals, and the correspondence between the terminal and the information domain location is configured through RRC signaling and used
  • the specific wireless network temporary identity (Radio Network Temporary Identity, RNTI) is scrambled, for example, by R-RNTI.
  • the size of the DCI is the same as the size of the DCI format 1-0 transmitted in the common search space (Common Search Space, CSS).
  • the DCI carries the bit field of the number of repeated transmissions of the downlink control channels of N terminals (that is, the above indication information).
  • the byte length corresponding to each bit field is 2 bits, and the relationship between the repetition times of the 2 bit bit field and the downlink control channel is shown in Table 3: 00 indicates that the downlink control channel does not need to be repeated, and 01 indicates that it needs to be repeated once , 10 means need to repeat 2 times, 11 means need to repeat 4 times.
  • Bit field of the number of repetitions of the downlink control channel repeat times 00 0 01 1 10 2 11 4
  • the length of the indication field of the number of repetitions of the downlink control channel and the number of repetitions corresponding to each state are not limited herein.
  • the relationship between the state of the repetition count indication information of the downlink control channel and the repetition count is not limited, that is, the high-level signaling can be configured with any corresponding relationship different from the above table.
  • UE A and UE B receive the group common PDCCH carrying the indication information, and after receiving the group common PDCCH, determine the number of repetitions of the data scheduling downlink control channel.
  • the information field corresponding to the number of repeated transmissions of the downlink control channel corresponding to UEA is 01
  • the information field corresponding to the number of repeated transmissions of the downlink control channel corresponding to UEB is 00
  • the downlink control channel of UEA needs to be transmitted twice repeatedly, UEB
  • the downlink control channel does not need to be repeatedly transmitted.
  • This solution can dynamically adjust the number of repeated transmissions of its downlink control channel according to different channel conditions of the terminal. For example, when the channel condition of UE A is very good, and the channel condition of UE B deteriorates, the downlink control channel of UE B can be instructed to repeatedly transmit and receive, so as to reduce the complexity of the terminal and reduce the delay.
  • the indication information carried by the group common PDCCH is valid for the time slot between two group common PDCCH transmissions, or until the next group common indication PDCCH carrying the indication information is successfully received.
  • the specific method for PDCCH repeated transmission is not limited.
  • the PDCCH can be continuously transmitted H times, and then the physical layer downlink shared channel (Physical Downlink Shared Channel, PDSCH) can be transmitted after the PDCCH transmission is completed; or the PDCCH and PDSCH are bundled and transmitted, that is, each PDCCH transmission is followed by one Correspondingly scheduled PDSCH transmission.
  • the physical layer downlink shared channel Physical Downlink Shared Channel, PDSCH
  • FIG. 4 is a structural diagram of a terminal provided by an embodiment of the present invention.
  • the terminal 400 includes:
  • the first receiving module 401 is used to receive indication information sent by the network side device, the indication information is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel ;
  • the second receiving module 402 is configured to receive the downlink control channel according to the instruction information.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the second receiving module 402 is configured to receive the downlink control channel according to the indication information of the terminal.
  • the indication information of the terminal is used to indicate: the number of repeated transmissions of the downlink control channel, and/or whether to enable the repeated transmission mode of the downlink control channel;
  • the indication information of the terminal is also used to indicate:
  • the number of repeated transmissions and/or whether the repetitive transmission mode of turning on the downlink control channel is valid during the transmission period of the group of common downlink control channels, or the number of repetitive transmissions and/or whether the downlink control channel is turned on
  • the effective repetitive transmission mode is terminated the next time the terminal successfully receives the group common downlink control channel.
  • the frequency domain resource allocation of the DCI is all 1, and the specific bit is N bits that are not utilized or reserved in the DCI, where the N is an integer greater than or equal to 1.
  • the first part of the specific bit is used to indicate that the DCI is used for scheduling of non-contention random access CFRA or used for the downlink control channel Repeated transmission instructions or for other types of uses;
  • the second part of the specific bit is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel.
  • the first partial bit is the first H bits of the specific bit
  • the second partial bit is one or more bits of the specific bit except the first H bits
  • the H is an integer less than the N.
  • the second part of the bit is also used to indicate:
  • the number of repeated transmissions and/or whether the effective time of the repeated transmission mode of the downlink control channel is enabled is enabled.
  • the DCI format is a DCI format used for data scheduling or a DCI format used for fallback downlink scheduling.
  • the number of repeated transmissions of the downlink control channel is a subset of the set of repetitions, where the set of repetitions is predefined by the protocol or configured by high-level signaling.
  • the number of repeated transmissions in the repeated transmission mode is predefined by the protocol or configured by high-level signaling; and/or
  • the number of repeated transmissions and/or the validity period of whether to enable the repeated transmission mode of the downlink control channel is pre-defined by high-level signaling configuration or protocol.
  • the above-mentioned terminal 400 in this embodiment may be a terminal of any implementation manner in the method embodiment in some embodiments of the present disclosure, and any implementation manner of the terminal in the method embodiment in some embodiments of the present disclosure may be implemented by this embodiment.
  • the implementation of the above-mentioned terminal 400 in the example and the same beneficial effects will not be repeated here.
  • FIG. 5 is a structural diagram of a network-side device provided by the present disclosure.
  • the network-side device 500 includes:
  • the first sending module 501 is used to send instruction information to the terminal, where the instruction information is used to indicate the number of repeated transmissions of the downlink control channel, and/or to indicate whether to enable the repeated transmission mode of the downlink control channel;
  • the second sending module 502 is configured to send the downlink control channel according to the instruction information.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the second sending module 502 is configured to send the downlink control channel of the terminal according to the instruction information of the terminal.
  • the indication information of the terminal is used to indicate: the number of repeated transmissions of the downlink control channel, and/or whether to enable the repeated transmission mode of the downlink control channel;
  • the indication information of the terminal is used to indicate that it is also used to indicate:
  • the number of repeated transmissions and/or whether the repetitive transmission mode of turning on the downlink control channel is valid during the transmission period of the group of common downlink control channels, or the number of repetitive transmissions and/or whether the downlink control channel is turned on
  • the effective repetitive transmission mode is terminated the next time the terminal successfully receives the group common downlink control channel.
  • the FDRA field of the DCI is all 1, and the specific bit bits are unused or reserved N bits in the DCI, where the N is an integer greater than or equal to 1.
  • the first part of the specific bit is used to indicate that the DCI is used for CFRA scheduling or for a repeated transmission indication of the downlink control channel or For other types of uses;
  • the second part of the specific bit is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel.
  • the first partial bit is the first H bits of the specific bit
  • the second partial bit is one or more bits of the specific bit except the first H bits
  • the H is an integer less than the N.
  • the second part of the bit is also used to indicate:
  • the number of repeated transmissions and/or whether the effective time of the repeated transmission mode of the downlink control channel is enabled is enabled.
  • the DCI format is a DCI format used for data scheduling or a DCI format used for fallback downlink scheduling.
  • the number of repeated transmissions of the downlink control channel is a subset of the set of repetitions, where the set of repetitions is predefined by the protocol or configured by high-level signaling.
  • the number of repeated transmissions in the repeated transmission mode is predefined by the protocol or configured by high-level signaling; and/or
  • the number of repeated transmissions and/or the validity period of whether to enable the repeated transmission mode of the downlink control channel is pre-defined by high-level signaling configuration or protocol.
  • the above network-side device 500 in this embodiment may be a network-side device in any implementation manner in the method embodiments in some embodiments of the present disclosure, and any implementation of the network-side device in method embodiments in some embodiments of the present disclosure
  • the methods can be implemented by the network side device 500 in this embodiment, and the same beneficial effects are achieved, which will not be repeated here.
  • FIG. 6 is a structural diagram of another terminal provided by some embodiments of the present disclosure.
  • the terminal includes: a transceiver 610, a memory 620, a processor 600, and stored in the memory 620 A program that can be run on the processor 600, where:
  • the transceiver 610 is configured to receive indication information sent by a network side device, the indication information is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel ;
  • the transceiver 610 is further configured to receive the downlink control channel according to the instruction information.
  • the transceiver 1510 can be used to receive and send data under the control of the processor 1500.
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 600 and various circuits of the memory represented by the memory 620 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article.
  • the bus interface provides an interface.
  • the transceiver 610 may be a plurality of elements, including a transmitter and a receiver, and provides a unit for communicating with various other devices on a transmission medium.
  • the processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 when performing operations.
  • the memory 620 is not limited to the terminal, and the memory 620 and the processor 600 may be separated in different geographic locations.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the step performed by the transceiver to receive the downlink control channel according to the instruction information specifically includes:
  • the indication information of the terminal is used to indicate: the number of repeated transmissions of the downlink control channel, and/or whether to enable the repeated transmission mode of the downlink control channel;
  • the indication information of the terminal is also used to indicate:
  • the number of repeated transmissions and/or whether the repetitive transmission mode of turning on the downlink control channel is valid during the transmission period of the group of common downlink control channels, or the number of repetitive transmissions and/or whether the downlink control channel is turned on
  • the effective repetitive transmission mode is terminated the next time the terminal successfully receives the group common downlink control channel.
  • the FDRA field of the DCI is all 1, and the specific bit bits are unused or reserved N bits in the DCI, where the N is an integer greater than or equal to 1.
  • the first part of the specific bit is used to indicate that the DCI is used for scheduling of non-contention random access CFRA or used for the downlink control channel Repeated transmission instructions or for other types of uses;
  • the second part of the specific bit is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel.
  • the first partial bit is the first H bits of the specific bit
  • the second partial bit is one or more bits of the specific bit except the first H bits
  • the H is an integer less than the N.
  • the second part of the bit is also used to indicate:
  • the number of repeated transmissions and/or whether the effective time of the repeated transmission mode of the downlink control channel is enabled is enabled.
  • the DCI format is a DCI format used for data scheduling or a DCI format used for fallback downlink scheduling.
  • the number of repeated transmissions of the downlink control channel is a subset of the set of repetitions, where the set of repetitions is predefined by the protocol or configured by high-level signaling.
  • the number of repeated transmissions in the repeated transmission mode is predefined by the protocol or configured by high-level signaling; and/or
  • the number of repeated transmissions and/or the validity period of whether to enable the repeated transmission mode of the downlink control channel is pre-defined by high-level signaling configuration or protocol.
  • the above terminal in this embodiment may be a terminal of any implementation manner in the method embodiment in some embodiments of the present disclosure, and any implementation manner of the terminal in the method embodiment in some embodiments of the present disclosure may be used in this embodiment.
  • the implementation of the above terminal in and the same beneficial effects will not be repeated here.
  • FIG. 7 is a structural diagram of another network-side device provided by some embodiments of the present disclosure.
  • the network-side device includes: a transceiver 710, a memory 720, a processor 700, and stored in A program on the memory 720 that can run on the processor, where:
  • the transceiver 710 is used to send instruction information to the terminal, where the instruction information is used to indicate the number of repeated transmissions of the downlink control channel, and/or to indicate whether to enable the repeated transmission mode of the downlink control channel;
  • the transceiver 710 is further configured to send the downlink control channel according to the instruction information.
  • the transceiver 710 can be used to receive and send data under the control of the processor 700.
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 700 and various circuits of the memory represented by the memory 720 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article.
  • the bus interface provides an interface.
  • the transceiver 710 may be a plurality of elements, including a transmitter and a receiver, and provides a unit for communicating with various other devices on a transmission medium.
  • the processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 when performing operations.
  • the memory 720 is not limited to only on the network side device, and the memory 720 and the processor 700 may be separated in different geographic locations.
  • the instruction information includes:
  • the indication information carried by the group common downlink control channel;
  • the group of common downlink control channels carries indication information of at least one terminal including the terminal;
  • the downlink control channel transmission performed by the transceiver 710 according to the instruction information includes:
  • the transceiver 710 sends the downlink control channel of the terminal according to the instruction information of the terminal.
  • the indication information of the terminal is used to indicate: the number of repeated transmissions of the downlink control channel, and/or whether to enable the repeated transmission mode of the downlink control channel;
  • the indication information of the terminal is used to indicate that it is also used to indicate:
  • the number of repeated transmissions and/or whether the repetitive transmission mode of turning on the downlink control channel is valid during the transmission period of the group of common downlink control channels, or the number of repetitive transmissions and/or whether the downlink control channel is turned on
  • the effective repetitive transmission mode is terminated the next time the terminal successfully receives the group common downlink control channel.
  • the FDRA field of the DCI is all 1, and the specific bit bits are unused or reserved N bits in the DCI, where the N is an integer greater than or equal to 1.
  • the first part of the specific bit is used to indicate that the DCI is used for CFRA scheduling or for a repeated transmission indication of the downlink control channel or For other types of uses;
  • the second part of the specific bit is used to indicate the number of repeated transmissions of the downlink control channel, and/or used to indicate whether to enable the repeated transmission mode of the downlink control channel.
  • the first partial bit is the first H bits of the specific bit
  • the second partial bit is one or more bits of the specific bit except the first H bits
  • the H is an integer less than the N.
  • the second part of the bit is also used to indicate:
  • the number of repeated transmissions and/or whether the effective time of the repeated transmission mode of the downlink control channel is enabled is enabled.
  • the DCI format is a DCI format used for data scheduling or a DCI format used for fallback downlink scheduling.
  • the number of repeated transmissions of the downlink control channel is a subset of the set of repetitions, where the set of repetitions is predefined by the protocol or configured by high-level signaling.
  • the number of repeated transmissions in the repeated transmission mode is predefined by the protocol or configured by high-level signaling; and/or
  • the number of repeated transmissions and/or the validity period of whether to enable the repeated transmission mode of the downlink control channel is pre-defined by high-level signaling configuration or protocol.
  • the above network-side device in this embodiment may be a network-side device in any implementation manner in the method embodiments in some embodiments of the present disclosure, and any implementation in the network-side device in method embodiments in some embodiments of the present disclosure. Both can be realized by the above network side device in this embodiment, and achieve the same beneficial effects, which will not be repeated here.
  • Some embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored, wherein, when the program is executed by a processor, a method for transmitting a downlink control channel on the terminal side provided by some embodiments of the present disclosure is implemented. Steps, or when the program is executed by the processor, implement the steps in the method for transmitting a downlink control channel on the network side device side provided by some embodiments of the present disclosure.
  • the disclosed method and apparatus may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.
  • the above integrated unit implemented in the form of a software functional unit may be stored in a computer-readable storage medium.
  • the above software functional unit is stored in a storage medium, and includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute part of the transmission method of the downlink control channel described in various embodiments of the present disclosure step.
  • the foregoing storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

La présente invention concerne un procédé de transmission de canal de commande de liaison descendante, un terminal et un dispositif de réseau. Le procédé comprend les étapes suivantes : un terminal reçoit des informations d'indication envoyées par un dispositif côté réseau, les informations d'indication étant utilisées pour indiquer le nombre de transmissions répétées d'un canal de commande de liaison descendante, et/ou étant utilisées pour indiquer s'il faut démarrer un mode de transmission répétée du canal de commande de liaison descendante ; le terminal reçoit le canal de commande de liaison descendante conformément aux informations d'indication.
PCT/CN2020/070667 2019-01-11 2020-01-07 Procédé de transmission de canal de commande de liaison descendante, terminal et dispositif côté réseau Ceased WO2020143617A1 (fr)

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CN119366150A (zh) * 2022-08-15 2025-01-24 上海诺基亚贝尔股份有限公司 下行链路控制信令优化
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WO2025015611A1 (fr) * 2023-07-20 2025-01-23 北京小米移动软件有限公司 Procédé de traitement d'informations, terminal, dispositif de réseau, et support de stockage
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