WO2022116014A1 - Procédé de détermination de tbs - Google Patents

Procédé de détermination de tbs Download PDF

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Publication number
WO2022116014A1
WO2022116014A1 PCT/CN2020/133174 CN2020133174W WO2022116014A1 WO 2022116014 A1 WO2022116014 A1 WO 2022116014A1 CN 2020133174 W CN2020133174 W CN 2020133174W WO 2022116014 A1 WO2022116014 A1 WO 2022116014A1
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Prior art keywords
res
information bits
prb
time slot
time slots
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PCT/CN2020/133174
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English (en)
Chinese (zh)
Inventor
余健
余雅威
郭志恒
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/133174 priority Critical patent/WO2022116014A1/fr
Priority to PCT/CN2021/086029 priority patent/WO2022116458A1/fr
Priority to CN202180079555.8A priority patent/CN116530137A/zh
Publication of WO2022116014A1 publication Critical patent/WO2022116014A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control

Definitions

  • the present application relates to the field of communications, and in particular, to a method for determining a transport block size (TBS).
  • TBS transport block size
  • a demodulation reference signal (DMRS) and a sounding reference signal (sounding) are defined.
  • SRS sounding reference signal
  • DMRS is used for physical uplink shared channel (physical uplink shared channel, PUSCH) data demodulation.
  • the SRS signal is used for channel state information (CSI) measurement.
  • CSI includes channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI) and SRS Resource indicator (SRS resource indicator, SRI), etc.
  • the 5G NR protocol supports the transmission of one transport block (TB) (contained data) per time slot.
  • TB1 may be transmitted on time slot 1 and TB2 may be transmitted on time slot 2 .
  • DSUUU uplink time slots
  • Information will lead to more downlink overhead, for example, will lead to physical downlink control channel (physical downlink control channel, PDCCH) resource shortage.
  • PDCCH physical downlink control channel
  • the embodiment of the present application provides a TBS determination method, which can reduce control signaling overhead.
  • an embodiment of the present application provides a method for determining a transport block size TBS, which is applied to a terminal device, including: receiving control information sent by a network device, and determining at least two time slots for data transmission according to the control information; determining at least two time slots for data transmission;
  • the number of resource element REs for carrying information bits included in each physical resource block PRB in the two time slots, and the number of REs for carrying information bits included in each PRB is based on the number of subcarriers included in each PRB , the number of orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols of the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH included in the at least two time slots, and the number of each time slot in the at least two time slots
  • the overhead is determined; wherein, at least two time slots include a first time slot and a second time slot, the overheads of the first time slot and the second time slot are different, or the PUSCH or PDSCH included
  • the number of PUSCH or PDSCH OFDM symbols in each time slot in at least two time slots and the overhead of each time slot are considered, so that TBS can be calculated more accurately. It is conducive to the improvement of resource utilization, and avoids data transmission errors and resource waste caused by inaccurate TBS calculation. For example, on the one hand, it avoids unnecessary retransmission caused by too large calculated TBS, resulting in waste of resources and increased delay in retransformation; waste problem.
  • determining the TBS according to the number of REs included in each PRB for carrying information bits includes: determining N corresponding to the terminal equipment according to the number of REs included in each PRB for carrying information bits
  • the number of REs included in the PRB for carrying information bits, N is indicated by the network device, and N is greater than or equal to 1; according to the corresponding code rate, modulation mode and transmission layer number of the terminal device, and the number of REs included in the N PRBs for bearing
  • the number of REs of information bits determines the number of information bits of data that can be transmitted in at least two time slots; the TBS is determined according to the number of information bits of data that can be transmitted in at least two time slots.
  • determining the number of resource elements REs for carrying information bits included in each physical resource block PRB in the at least two time slots includes: determining each PRB corresponding to the PUSCH in the at least two time slots The number of included REs for carrying information bits; or determining the number of REs for carrying information bits included in each PRB corresponding to the PDSCH in at least two time slots.
  • the overhead of the first time slot includes the number of REs included in the DMRS code division multiplexing group (CDM group) of the demodulation reference signal that does not transmit data on the first time slot, the overhead of high-layer signaling configuration, At least one of the REs included in the sounding reference signal SRS or the number of muted REs, the muted REs include REs with zero power;
  • the overhead of the second time slot includes REs included in the DMRS CDM group that does not transmit data on the second time slot At least one of the number of , the overhead of higher layer signaling configuration, the sounding reference signal SRS or the number of muted REs.
  • the first time slot includes a DMRS CDM group without data transmission
  • the second time slot does not include a DMRS CDM group without transmission data
  • the overhead of each time slot in at least two time slots further includes the number of REs occupied by downlink symbols in each time slot; in downlink transmission, at least two time slots The overhead of each slot in the slot also includes the number of REs occupied by the uplink symbols in each slot.
  • the PRBs respectively corresponding to the first time slot and/or the second time slot include more than 156 REs for carrying information bits.
  • determining the TBS according to the number of REs for carrying information bits included in each PRB includes: determining the TBS according to the number of REs for carrying information bits included in each PRB and a scaling factor; wherein , the value of the scaling factor of TBS is based on the number of REs used to carry information bits included in the N PRBs corresponding to the terminal equipment in at least two time slots and the corresponding number of REs in the first time slot of the at least two time slots by the terminal equipment The number of REs for carrying information bits included in the N PRBs is determined.
  • determining the number of resource elements RE for carrying information bits included in each physical resource block PRB in the at least two time slots includes:
  • N' RE represents the number of resource element REs for carrying information bits included in each physical resource block PRB in at least two time slots, represents the number of subcarriers included in a PRB in the frequency domain, represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH, represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot,
  • Overhead configured for higher layer signaling, Indicates the number of REs or muted REs included in the SRS included in the i-th time slot in at least two time slots, i is an integer greater than or equal to 1, M start is the start time slot index of the scheduled PUSCH or PDSCH, M end is the end slot index of the scheduled PUSCH or PDSCH.
  • determining the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB includes:
  • N RE min(156 ⁇ (M end -M start +1),N' RE ) ⁇ n PRB
  • N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device
  • N' RE represents the number of resource units REs used to carry information bits included in each PRB in at least two time slots
  • M start is the start slot index of the scheduled PUSCH or PDSCH
  • M end is the end slot index of the scheduled PUSCH or PDSCH
  • n PRB is the base station allocated to the terminal number of PRBs.
  • determining the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB includes:
  • N RE N' RE ⁇ n PRB
  • N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device
  • N' RE represents the number of resource units REs used to carry information bits included in each PRB in at least two time slots
  • n PRB is the number of PRBs allocated by the base station to the terminal.
  • determining the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB includes: according to the scaling factor and each The number of REs for carrying information bits included in the PRBs determines the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device; wherein, the scaling factor is based on the N corresponding to the terminal device in at least two time slots.
  • the number of REs used to carry information bits included in each PRB is determined by the number of REs used to carry information bits included in the N PRBs corresponding to the first time slot of the at least two time slots by the terminal device, including:
  • K is the scaling factor, represents the number of subcarriers included in a PRB in the frequency domain, represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH, represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot, Indicates the overhead of higher layer signaling configuration, Indicates the number of REs or muted REs included in the SRS included in the i-th time slot in at least two time slots, i is an integer greater than or equal to 1, M start is the start time slot index of the scheduled PUSCH or PDSCH, M end is the end slot index of the scheduled PUSCH or PDSCH.
  • an embodiment of the present application provides a method for determining a TBS, which is applied to a network device, including: sending control information to a terminal device, where the control information is used to indicate at least two time slots for data transmission; determining at least two time slots
  • the number of resource element REs used for carrying information bits included in each physical resource block PRB in the slot, and the number of REs used for carrying information bits included in each PRB is based on the number of subcarriers included in each PRB, at least two It is determined by the number of OFDM symbols of the physical uplink shared channel PUSCH or physical downlink shared channel PDSCH included in the time slots, and the overhead of each time slot in the at least two time slots; wherein the at least two time slots include the first time slot and the second time slot, the overhead of the first time slot and the second time slot is different, or the number of PUSCH or PDSCH OFDM symbols included in the first time slot and the second time slot is different;
  • the number of REs of information bits determines the TBS.
  • determining the TBS according to the number of REs included in each PRB for carrying information bits includes: determining N corresponding to the terminal equipment according to the number of REs included in each PRB for carrying information bits
  • the number of REs included in the PRB for carrying information bits, N is indicated by the network device, and N is greater than or equal to 1; according to the corresponding code rate, modulation mode and transmission layer number of the terminal device, and the number of REs included in the N PRBs for bearing
  • the number of REs of information bits determines the number of information bits of data that can be transmitted in at least two time slots; the TBS is determined according to the number of information bits of data that can be transmitted in at least two time slots.
  • determining the number of resource elements REs for carrying information bits included in each physical resource block PRB in the at least two time slots includes: determining each PRB corresponding to the PUSCH in the at least two time slots The number of included REs for carrying information bits; or determining the number of REs for carrying information bits included in each PRB corresponding to the PDSCH in at least two time slots.
  • the overhead of the first time slot includes the number of REs included in the DMRS code division multiplexing group (CDM group) of the demodulation reference signal that does not transmit data on the first time slot, the overhead of high-layer signaling configuration, At least one of the REs included in the sounding reference signal SRS or the number of muted REs, the muted REs include REs with zero power;
  • the overhead of the second time slot includes REs included in the DMRS CDM group that does not transmit data on the second time slot At least one of the number of , the overhead of higher layer signaling configuration, the sounding reference signal SRS or the number of muted REs.
  • the first time slot includes a DMRS CDM group without data transmission
  • the second time slot does not include a DMRS CDM group without transmission data
  • the overhead of each time slot in at least two time slots further includes the number of REs occupied by downlink symbols in each time slot; in downlink transmission, at least two time slots The overhead of each slot in the slot also includes the number of REs occupied by the uplink symbols in each slot.
  • the PRBs respectively corresponding to the first time slot and/or the second time slot include more than 156 REs for carrying information bits.
  • determining the TBS according to the number of REs for carrying information bits included in each PRB includes: determining the TBS according to the number of REs for carrying information bits included in each PRB and a scaling factor; wherein , the value of the scaling factor of TBS is based on the number of REs used to carry information bits included in the N PRBs corresponding to the terminal equipment in at least two time slots and the corresponding number of REs in the first time slot of the at least two time slots by the terminal equipment The number of REs for carrying information bits included in the N PRBs is determined.
  • determining the number of resource elements RE for carrying information bits included in each physical resource block PRB in the at least two time slots includes:
  • N' RE represents the number of resource element REs for carrying information bits included in each physical resource block PRB in at least two time slots, represents the number of subcarriers included in a PRB in the frequency domain, represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH, represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot,
  • Overhead configured for higher layer signaling, Indicates the number of REs or muted REs included in the SRS included in the i-th time slot in at least two time slots, i is an integer greater than or equal to 1, M start is the start time slot index of the scheduled PUSCH or PDSCH, M end is the end slot index of the scheduled PUSCH or PDSCH.
  • determining the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB includes:
  • N RE min(156 ⁇ (M end -M start +1),N' RE ) ⁇ n PRB
  • N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device
  • N' RE represents the number of resource units REs used to carry information bits included in each PRB in at least two time slots
  • M start is the start slot index of the scheduled PUSCH or PDSCH
  • M end is the end slot index of the scheduled PUSCH or PDSCH
  • n PRB is the base station allocated to the terminal number of PRBs.
  • determining the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB includes:
  • N RE N' RE ⁇ n PRB
  • N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device
  • N' RE represents the number of resource units REs used to carry information bits included in each PRB in at least two time slots
  • n PRB is the number of PRBs allocated by the base station to the terminal.
  • determining the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB includes: according to the scaling factor and each The number of REs for carrying information bits included in the PRBs determines the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device; wherein, the scaling factor is based on the N corresponding to the terminal device in at least two time slots.
  • the number of REs used to carry information bits included in each PRB is determined by the number of REs used to carry information bits included in the N PRBs corresponding to the first time slot of the at least two time slots by the terminal device, including:
  • K is the scaling factor, represents the number of subcarriers included in a PRB in the frequency domain, represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH, represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot, Indicates the overhead of higher layer signaling configuration, Indicates the number of REs or muted REs included in the SRS included in the i-th time slot in at least two time slots, i is an integer greater than or equal to 1, M start is the start time slot index of the scheduled PUSCH or PDSCH, M end is the end slot index of the scheduled PUSCH or PDSCH.
  • an embodiment of the present application provides a communication apparatus, including: a receiving unit, configured to receive control information sent by a network device, and determine at least two time slots for data transmission according to the control information; a processing unit, configured to determine The number of resource element REs used for carrying information bits included in each physical resource block PRB in at least two time slots, and the number of REs used for carrying information bits included in each PRB is based on the subcarriers included in each PRB.
  • the number, the number of OFDM symbols of the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH included in the at least two time slots, and the overhead of each time slot in the at least two time slots are determined; wherein, the at least two time slots include The first time slot and the second time slot, the overhead of the first time slot and the second time slot are different, or the number of PUSCH or PDSCH OFDM symbols included in the first time slot and the second time slot is different;
  • the TBS is determined according to the number of REs included in each PRB for carrying information bits.
  • the processing unit is configured to: determine the number of REs for carrying information bits included in N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB, N It is indicated by the network device, and N is greater than or equal to 1; according to the corresponding code rate, modulation mode, and number of transmission layers of the terminal device, and the number of REs used to carry information bits included in the N PRBs, it is determined that at least two time slots can The number of information bits of the transmitted data; the TBS is determined according to the number of information bits of the data that can be transmitted in at least two time slots.
  • the processing unit is configured to: determine the number of REs for carrying information bits included in each PRB corresponding to the PUSCH in the at least two time slots; or determine the number of REs corresponding to the PDSCH in the at least two time slots The number of REs included in each PRB for carrying information bits.
  • the overhead of the first time slot includes the number of REs included in the DMRS code division multiplexing group (CDM group) of the demodulation reference signal that does not transmit data on the first time slot, the overhead of high-layer signaling configuration, At least one of the REs included in the sounding reference signal SRS or the number of muted REs, the muted REs include REs with zero power;
  • the overhead of the second time slot includes REs included in the DMRS CDM group that does not transmit data on the second time slot At least one of the number of , the overhead of higher layer signaling configuration, the sounding reference signal SRS or the number of muted REs.
  • the first time slot includes a DMRS CDM group without data transmission
  • the second time slot does not include a DMRS CDM group without transmission data
  • the overhead of each time slot in at least two time slots further includes the number of REs occupied by downlink symbols in each time slot; in downlink transmission, at least two time slots The overhead of each slot in the slot also includes the number of REs occupied by the uplink symbols in each slot.
  • the PRBs respectively corresponding to the first time slot and/or the second time slot include more than 156 REs for carrying information bits.
  • the processing unit is configured to: determine the TBS according to the number of REs used for carrying information bits included in each PRB and the scaling factor; wherein, the value of the scaling factor of the TBS is based on the terminal equipment at least The number of REs used for carrying information bits included in the N PRBs corresponding to two time slots and the number of REs used for carrying information bits included in the N PRBs corresponding to the first time slot of the at least two time slots by the terminal device; Quantity is determined.
  • N' RE represents the number of resource element REs for carrying information bits included in each physical resource block PRB in at least two time slots, represents the number of subcarriers included in a PRB in the frequency domain, represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH, represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot,
  • Overhead configured for higher layer signaling, Indicates the number of REs or muted REs included in the SRS included in the i-th time slot in at least two time slots, i is an integer greater than or equal to 1, M start is the start time slot index of the scheduled PUSCH or PDSCH, M end is the end slot index of the scheduled PUSCH or PDSCH.
  • N RE min(156 ⁇ (M end -M start +1),N' RE ) ⁇ n PRB
  • N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device
  • N' RE represents the number of resource units REs used to carry information bits included in each PRB in at least two time slots
  • M start is the start slot index of the scheduled PUSCH or PDSCH
  • M end is the end slot index of the scheduled PUSCH or PDSCH
  • n PRB is the base station allocated to the terminal number of PRBs.
  • N RE N' RE ⁇ n PRB
  • N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device
  • N' RE represents the number of resource units REs used to carry information bits included in each PRB in at least two time slots
  • n PRB is the number of PRBs allocated by the base station to the terminal.
  • the processing unit is configured to: determine, according to the scaling factor and the number of REs included in each PRB for carrying information bits, the number of REs included in the N PRBs corresponding to the terminal device and used for carrying information bits. Quantity; wherein, the scaling factor is based on the number of REs used for carrying information bits included in the N PRBs corresponding to the terminal equipment in at least two time slots and the N corresponding to the first time slot of the terminal equipment in the at least two time slots
  • the number of REs used to carry information bits included in each PRB is determined, including:
  • K is the scaling factor, represents the number of subcarriers included in a PRB in the frequency domain, represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH, represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot, Indicates the overhead of higher layer signaling configuration, Indicates the number of REs or muted REs included in the SRS included in the i-th time slot in at least two time slots, i is an integer greater than or equal to 1, M start is the start time slot index of the scheduled PUSCH or PDSCH, M end is the end slot index of the scheduled PUSCH or PDSCH.
  • an embodiment of the present application provides a communication apparatus, including: a sending unit configured to send control information to a terminal device, where the control information is used to indicate at least two time slots used for data transmission; a processing unit configured to determine The number of resource element REs used for carrying information bits included in each physical resource block PRB in at least two time slots, and the number of REs used for carrying information bits included in each PRB is based on the subcarriers included in each PRB.
  • the number, the number of OFDM symbols of the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH included in the at least two time slots, and the overhead of each time slot in the at least two time slots are determined; wherein, the at least two time slots include The first time slot and the second time slot, the overhead of the first time slot and the second time slot are different, or the number of PUSCH or PDSCH OFDM symbols included in the first time slot and the second time slot is different;
  • the TBS is determined according to the number of REs included in each PRB for carrying information bits.
  • the processing unit is configured to: determine the number of REs for carrying information bits included in N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB, N is indicated by the network device, and N is greater than or equal to 1; according to the corresponding code rate, modulation mode and transmission layer number of the terminal device, and the number of REs used to carry information bits included in the N PRBs, determine the number of at least two time slots.
  • the number of information bits of data that can be transmitted; TBS is determined according to the number of information bits of data that can be transmitted in at least two time slots.
  • the processing unit is configured to: determine the number of REs for carrying information bits included in each PRB corresponding to the PUSCH in the at least two time slots; or determine the corresponding PDSCH in the at least two time slots The number of REs that each PRB includes for carrying information bits.
  • the overhead of the first time slot includes the number of REs included in the DMRS code division multiplexing group (CDM group) of the demodulation reference signal that does not transmit data on the first time slot, the overhead of high-layer signaling configuration, At least one of the REs included in the sounding reference signal SRS or the number of muted REs, the muted REs include REs with zero power;
  • the overhead of the second time slot includes REs included in the DMRS CDM group that does not transmit data on the second time slot At least one of the number of , the overhead of higher layer signaling configuration, the sounding reference signal SRS or the number of muted REs.
  • the first time slot includes a DMRS CDM group without data transmission
  • the second time slot does not include a DMRS CDM group without transmission data
  • the overhead of each time slot in at least two time slots further includes the number of REs occupied by downlink symbols in each time slot; in downlink transmission, at least two time slots The overhead of each slot in the slot also includes the number of REs occupied by the uplink symbols in each slot.
  • the PRBs respectively corresponding to the first time slot and/or the second time slot include more than 156 REs for carrying information bits.
  • the processing unit is configured to: determine the TBS according to the number of REs used for carrying information bits included in each PRB and the scaling factor; wherein, the value of the scaling factor of the TBS is based on the The number of REs used for carrying information bits included in the N PRBs corresponding to at least two time slots and the REs used for carrying information bits included in the N PRBs corresponding to the first time slot of the at least two time slots by the terminal device number is determined.
  • determining the number of resource elements RE for carrying information bits included in each physical resource block PRB in the at least two time slots includes:
  • N' RE represents the number of resource element REs for carrying information bits included in each physical resource block PRB in at least two time slots, represents the number of subcarriers included in a PRB in the frequency domain, represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH, represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot,
  • Overhead configured for higher layer signaling, Indicates the number of REs or muted REs included in the SRS included in the i-th time slot in at least two time slots, i is an integer greater than or equal to 1, M start is the start time slot index of the scheduled PUSCH or PDSCH, M end is the end slot index of the scheduled PUSCH or PDSCH.
  • determining the number of REs for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs for carrying information bits included in each PRB includes:
  • N RE min(156 ⁇ (M end -M start +1),N' RE ) ⁇ n PRB
  • N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device
  • N' RE represents the number of resource units REs used to carry information bits included in each PRB in at least two time slots
  • M start is the start slot index of the scheduled PUSCH or PDSCH
  • M end is the end slot index of the scheduled PUSCH or PDSCH
  • n PRB is the base station allocated to the terminal number of PRBs.
  • N RE N' RE ⁇ n PRB
  • N RE represents the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device
  • N' RE represents the number of resource units REs used to carry information bits included in each PRB in at least two time slots
  • n PRB is the number of PRBs allocated by the base station to the terminal.
  • the processing unit is configured to: determine, according to the scaling factor and the number of REs included in each PRB for carrying information bits, the REs included in the N PRBs corresponding to the terminal device and used for bearing information bits
  • the scaling factor is based on the number of REs used to carry information bits included in the N PRBs corresponding to the terminal equipment in at least two time slots and the terminal equipment corresponds to the first time slot of the at least two time slots
  • the number of REs for carrying information bits included in the N PRBs is determined, including:
  • K is the scaling factor, represents the number of subcarriers included in a PRB in the frequency domain, represents the number of OFDM symbols allocated for the ith slot PUSCH or PDSCH, represents the number of REs included in the DMRS CDM group that does not transmit data in the i-th time slot, Indicates the overhead of higher layer signaling configuration, Indicates the number of REs or muted REs included in the SRS included in the i-th time slot in at least two time slots, i is an integer greater than or equal to 1, M start is the start time slot index of the scheduled PUSCH or PDSCH, M end is the end slot index of the scheduled PUSCH or PDSCH.
  • an embodiment of the present application provides a communication device, the device exists in the form of a chip, the structure of the device includes a processor and a memory, and the memory is used for coupling with the processor and storing necessary programs of the device Instructions and data, the processor is used to execute the program instructions stored in the memory, so that the apparatus executes the function of the terminal device in the above method.
  • an embodiment of the present application provides a communication device, which can implement the functions performed by the terminal device in any of the methods provided in the first aspect above.
  • the functions can be implemented by hardware, or the corresponding functions can be implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device includes a processor and a communication interface, and the processor is configured to support the communication device to perform corresponding functions in any one of the methods provided in the first aspect.
  • the communication interface is used to support communication between the communication device and other network elements.
  • the communication device may also include a memory for coupling with the processor that holds program instructions and data necessary for the communication device.
  • an embodiment of the present application provides a computer-readable storage medium, including instructions, which, when executed on a communication device, cause the communication device to execute any one of the methods provided in the first aspect.
  • an embodiment of the present application provides a computer program product including instructions, which, when executed on a communication device, causes the communication device to execute any one of the methods provided in the first aspect.
  • an embodiment of the present application provides a communication device, the device exists in the form of a chip product, and the structure of the device includes a processor and a memory, the memory is used for coupling with the processor and storing necessary programs of the device Instructions and data, the processor is configured to execute the program instructions stored in the memory, so that the communication apparatus performs the function of the network device in the above method.
  • an embodiment of the present application provides a communication device.
  • the communication device can implement the functions performed by the network device in any of the methods provided in the second aspect.
  • the functions can be implemented by hardware, or the corresponding functions can be implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device includes a processor and a communication interface, and the processor is configured to support the communication device to perform corresponding functions in any one of the methods provided in the second aspect.
  • the communication interface is used to support communication between the communication device and other network elements.
  • the communication device may also include a memory for coupling with the processor that holds program instructions and data necessary for the communication device.
  • an embodiment of the present application provides a computer-readable storage medium, including instructions, which, when executed on a communication device, cause the communication device to execute any one of the methods provided in the second aspect.
  • an embodiment of the present application provides a computer program product including instructions, which, when executed on a communication device, causes the communication device to execute any one of the methods provided in the second aspect.
  • a thirteenth aspect provides a communication system, the system includes the communication device provided in the third aspect and the communication device provided in the fourth aspect, or includes the communication device provided in the third aspect and the communication device provided in the fourth aspect .
  • Fig. 1 is a kind of schematic diagram of mapping one TB to one time slot in the prior art
  • FIG. 2 is a schematic diagram of a system architecture provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of signal interaction applicable to a TBS determination method provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of mapping one TB to multiple time slots according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of an overhead on a first time slot provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of overhead on different time slots provided by an embodiment of the present application.
  • FIG. 9 is another schematic diagram of signal interaction applicable to the TBS determination method provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another terminal device provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of still another network device provided by an embodiment of the application.
  • the 5G NR protocol only supports one time slot to transmit data contained in one TB.
  • TBS When calculating TBS, only the case of 1 TB in 1 time slot is also considered.
  • scheduling information such as time-frequency resource allocation, modulation, and coding for uplink transmission through downlink control indicator (DCI).
  • DCI downlink control indicator
  • the scheduling information is separately indicated for each uplink time slot, more downlink overhead will be caused, for example, the PDCCH resources will be tight.
  • users at the edge of the cell may have a low received signal-to-interference-noise ratio and may have limited coverage.
  • a TB can transmit across multiple time slots, it only needs to indicate the scheduling information once, which can effectively reduce the control signaling overhead.
  • a potential solution is to scale the TBS according to the number of time slots, as shown in equation (1).
  • N inf o K ⁇ NRE ⁇ R ⁇ Qm ⁇ (1)
  • K represents the number of time slots, that is, 1 TB is mapped to K time slots for transmission.
  • N RE is determined according to the first slot of the K slots.
  • the number of PUSCH symbols in the first time slot is not equal to the number of PUSCH symbols in the subsequent time slot (eg, the second time slot), it will result in inaccurate N RE calculation.
  • the number of PUSCH symbols in a special time slot is not equal to the number of symbols in a full uplink time slot.
  • the inaccurate TBS calculation will reduce the efficiency of data transmission. If the TBS calculation is too large, it may cause data transmission errors, cause unnecessary retransmissions, increase transmission delay and cause waste of resources. If the TBS calculation is too small, the amount of transmitted data may be too small, resulting in a waste of resources.
  • the present application provides a method for determining TBS, which can solve the problem that TBS calculation is inaccurate (large error) due to the different overhead of each time slot when one TB is transmitted across multiple time slots.
  • the method includes: the terminal device determines at least two time slots for data transmission according to control information sent by the network device; determines the number of REs used for carrying information bits included in each PRB in the at least two time slots, each The number of REs included in the PRB for carrying information bits is based on the number of subcarriers included in each PRB, the number of OFDM symbols of the PUSCH or PDSCH included in at least two slots, and the number of OFDM symbols in each of the at least two slots.
  • the overhead of the slot is determined; wherein, at least two time slots include a first time slot and a second time slot, and the overheads of the first time slot and the second time slot are different; according to the REs included in each PRB for carrying information bits
  • the quantity determines the TBS. Since at least two time slots are used for data transmission, that is, one TB can be mapped to at least two time slots, scheduling information (time-frequency resource allocation, modulation, coding, etc.) can be indicated once for the at least two time slots, and there is no need to separately Indicating scheduling information for each time slot can reduce control signaling overhead.
  • TB transmission across multiple time slots can also reduce cyclic redundancy check (CRC) overhead.
  • CRC cyclic redundancy check
  • the TBS determination method provided in the embodiment of the present application may be applied to a 4G communication system, a 5G communication system, or a future mobile communication system.
  • the NR system applied to 5G may be applied to a 4G communication system, a 5G communication system, or a future mobile communication system.
  • the NR system applied to 5G may be applied to 5G.
  • FIG. 2 is a schematic diagram of a communication system to which the technical solutions provided in the embodiments of the present application are applied, and the communication system may include a network device 100 and one or more terminal devices 200 connected to the network device 100 (FIG. 2 only shows 1). Data transmission can be performed between network equipment and terminal equipment.
  • the network device 100 may be a device capable of communicating with the terminal device 200 .
  • the network device 100 may be a base station, which may be an evolved NodeB (evolved NodeB, eNB or eNodeB) in LTE, a base station in NR, or a relay station or access point, or a base station in a future network etc., which are not limited in the embodiments of the present application.
  • the base station in the NR may also be referred to as a transmission reception point (transmission reception point, TRP) or a gNB.
  • the network device may be an independently sold network device, such as a base station, or a chip that implements corresponding functions in the network device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.
  • the terminal device 200 in this embodiment of the present application may also be referred to as a terminal, which may be a device with a wireless transceiver function, and the terminal may be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it may also be deployed in On the water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.).
  • the terminal equipment may be user equipment (user equipment, UE).
  • the UE includes a handheld device, a vehicle-mounted device, a wearable device or a computing device with a wireless communication function.
  • the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • the terminal device may also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, intelligent Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the terminal device may be a terminal sold independently, or may be a chip in the terminal.
  • the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the terminal being a terminal device as an example.
  • the network device 100 or the terminal device 200 in FIG. 2 in this embodiment of the present application may be implemented by one device, or may be a functional module in one device, which is not specifically limited in this embodiment of the present application. It is to be understood that the above functions can be either network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (eg, a cloud platform), or a system-on-a-chip. . In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.
  • FIG. 3 is a schematic diagram of a hardware structure of an apparatus 300 according to an embodiment of the present application.
  • the apparatus 300 includes at least one processor 301, which is configured to implement the functions of the terminal device provided by the embodiments of the present application.
  • the apparatus 300 may also include a bus 302 and at least one communication interface 304 .
  • a memory 303 may also be included in the apparatus 300 .
  • the processor may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, or a controller, microcontroller, programmable logic device (PLD), or any combination thereof.
  • the processor may also be any other apparatus having processing functions, such as a circuit, a device or a software module.
  • the bus 302 may be used to transfer information between the aforementioned components.
  • the communication interface 304 is used to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN) and the like.
  • the communication interface 304 may be an interface, a circuit, a transceiver or other devices capable of implementing communication, which is not limited in this application.
  • Communication interface 304 may be coupled to processor 301 .
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the memory may be a read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, a random access memory (RAM) or a storage device capable of storing static information and instructions.
  • ROM read-only memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • Other optical disc storage optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disc storage medium or other magnetic storage device, or capable of being used to carry or store desired in the form of instructions or data structures
  • Program code and any other medium that can be accessed by a computer but is not limited thereto.
  • the memory can exist independently or be coupled to the processor, such as through bus 302 .
  • the memory can also be integrated with the processor.
  • the memory 303 is used for storing program instructions, and can be controlled and executed by the processor 301, thereby implementing the method for sending a random access message provided by the following embodiments of the present application.
  • the processor 301 is configured to invoke and execute the instructions stored in the memory 303, thereby implementing the method for sending a random access message provided by the following embodiments of the present application.
  • the computer instructions in the embodiments of the present application may also be referred to as program codes, which are not specifically limited in the embodiments of the present application.
  • memory 303 may be included in processor 301 .
  • the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3 .
  • the apparatus 300 may include multiple processors, such as the processor 301 and the processor 307 in FIG. 3 .
  • processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • the apparatus 300 may further include an output device 305 and an input device 306 .
  • Output device 305 is coupled to processor 301 and can display information in a variety of ways.
  • the output device 305 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • Input device 306 is coupled to processor 301 and can receive user input in a variety of ways.
  • the input device 306 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.
  • the above-mentioned apparatus 300 may be a general-purpose device or a special-purpose device.
  • the terminal device 300 may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a similar structure in FIG. 3 . equipment.
  • PDA personal digital assistant
  • This embodiment of the present application does not limit the type of the apparatus 300 .
  • FIG. 4 is a schematic diagram of a hardware structure of an apparatus 400 according to an embodiment of the present application.
  • the apparatus 400 includes at least one processor 401, which is configured to implement the functions of the terminal device provided by the embodiments of the present application.
  • the apparatus 400 may also include a bus 402 and at least one communication interface 404 .
  • a memory 403 may also be included in the apparatus 400 .
  • the bus 402 may be used to transfer information between the aforementioned components.
  • a communication interface 404 for communicating with other devices or communication networks, such as Ethernet, RAN, WLAN, and the like.
  • the communication interface 404 may be an interface, a circuit, a transceiver or other devices capable of implementing communication, which is not limited in this application.
  • Communication interface 404 may be coupled to processor 401 .
  • the memory 403 is used for storing program instructions, and can be controlled and executed by the processor 401, thereby implementing the method for sending a random access message provided by the following embodiments of the present application.
  • the processor 401 is configured to invoke and execute the instructions stored in the memory 403, thereby implementing the method for sending a random access message provided by the following embodiments of the present application.
  • memory 403 may be included in processor 401 .
  • the processor 401 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 4 .
  • the apparatus 400 may include multiple processors, such as the processor 401 and the processor 407 in FIG. 4 . Each of these processors can be a single-core processor or a multi-core processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • an embodiment of the present application provides a method for determining TBS, including:
  • the network device sends control information to the terminal device.
  • the control information is used to indicate at least two time slots for transmitting data. Wherein, the at least two time slots can be used to transmit one TB.
  • the control information may be, for example, downlink control information (downlink control information, DCI), and the DCI may indicate the starting OFDM symbol index and the total symbol length of the scheduled PUSCH or PDSCH.
  • TB1 may be transmitted on time slot 1 and time slot 2, ie, TB may be transmitted across multiple (two) time slots.
  • Each TB needs to be added with CRC during transmission. If a TB is transmitted in one time slot, CRC needs to be added to each time slot; if a TB is transmitted across multiple time slots, there is no need to add CRC to each time slot.
  • the CRC can be added once in multiple time slots, thereby reducing the time-frequency resources occupied by the CRC.
  • the increase of time domain resources for transmitting a TB will increase the TBS, and the coding code length may increase, so as to obtain more coding gains.
  • the frequency domain resources can be correspondingly reduced. In this way, under the same total transmit power, the fewer the frequency domain resources, the higher the transmit power on each subcarrier, which is beneficial to obtain better channel estimation performance.
  • the joint channel estimation of multiple timeslots can be combined to improve the readiness of the channel estimation, and at the same time, the DMRS overhead can be reduced.
  • the expansion of the time domain resources of TB will correspondingly increase the transmission delay, which is more suitable for some delay-insensitive services or scenarios.
  • the terminal device receives the control information sent by the network device.
  • the terminal device may determine at least two time slots for transmitting data according to the control information.
  • the terminal device determines the number of REs for carrying information bits included in each PRB in the at least two time slots.
  • each PRB may be transmitted across at least two time slots.
  • the number of REs included in each PRB for carrying information bits is based on the number of subcarriers included in each PRB, the number of PUSCH or PDSCH OFDM symbols included in at least two time slots, and the number of at least two time slots The cost of each slot in is determined.
  • REs used to carry information bits may be called valid REs. It should be noted that when a TB is transmitted across multiple time slots, the amount of data carried by each time slot will be different due to the different overhead or the number of valid REs in each time slot. Therefore, when calculating the TBS, it is necessary to consider each time slot. Overhead in time slot.
  • the at least two time slots may include a first time slot and a second time slot, the overhead of the first time slot and the second time slot being different.
  • the number of OFDM symbols of the PUSCH or PDSCH included in the first slot and the second slot is different.
  • the overhead of the first time slot may include at least one of the number of REs included in the DMRS CDM group that does not transmit data on the first time slot, the overhead configured by higher layer signaling, and the number of SRS or muted REs.
  • the overhead of the second time slot includes at least one of the number of REs included in the DMRS CDM group that does not transmit data on the second time slot, the overhead of higher layer signaling configuration, and the number of SRS or muted REs.
  • the first time slot includes a DMRS CDM group without data transmission
  • the second time slot does not include a DMRS CDM group without transmission data.
  • the fact that the first time slot includes a DMRS CDM group that does not transmit data may mean that S groups of DMRS CDM groups are configured on the first time slot, wherein, L groups of DMRS CDM groups do not transmit data, but transmit DMRS.
  • S and L are integers greater than or equal to 1, and S is greater than or equal to L.
  • the fact that the second time slot does not include a DMRS CDM group that does not transmit data may mean that no DMRS CDM group is configured on the second time slot; or, a P group of DMRS CDM groups is configured on the first time slot, wherein, Group G DMRS The CDM group is used to transmit data, not DMRS.
  • P and G are integers greater than or equal to 1, and P is greater than or equal to G.
  • the DMRS CDM group that does not transmit data on the first time slot may include 6 groups, and each group of DMRS CDM may include 8 REs.
  • the DMRS CDM group used for data transmission may include one group, the DMRS CDM group not used for data transmission may include 5 groups, the DMRS CDM group not used for data transmission may be regarded as silent REs, and the silent REs may include 40 RE; the overhead of the high-layer signaling configuration on the first time slot may include 6 REs. In this way, the overhead of the first slot includes a total of 54 REs.
  • the silent REs may refer to REs with zero power. That is, data may be sent on silent REs without using transmit power.
  • the muted REs can be used for interference measurement for uplink transmission or downlink transmission.
  • the terminal device may not transmit data on the silent RE, and the network device (eg, base station) may measure the interference of neighboring cells based on the silent RE.
  • the network device eg, base station
  • a network device eg, a base station
  • the terminal device may measure the interference of neighboring cells based on the silent REs.
  • the overhead of each time slot in at least two time slots also includes the number of REs occupied by downlink symbols in each time slot; in downlink transmission, the overhead of each time slot in at least two time slots The overhead also includes the number of REs occupied by uplink symbols in each slot.
  • a frame structure 'DSUUU' may be included, wherein the frame structure may include a 'S' time slot, a 'U' time slot and a 'D' time slot. gap.
  • the 'S' time slot includes both downlink symbols and uplink symbols, and the number of uplink symbols is usually less than 14.
  • the 'U' time slot is an all uplink time slot, and the 'D' time slot is an all downlink time slot. It should be noted that the 'U' time slot may contain a small number of downlink symbols, and the 'D' time slot may contain a small number of uplink symbols.
  • the number of symbols used to transmit the PUSCH in the S slot and the U slot is not equal. For example, there are 7 symbols used to transmit PUSCH in the S slot, among which there are 6 symbols used to transmit PUSCH data, 1 symbol used to transmit DMRS, and 7 downlink symbols; in each U slot There is one symbol for transmitting DMRS, and 13 symbols for transmitting PUSCH data.
  • the number of DMRS symbols in different time slots is different, resulting in an unequal number of symbols available for transmitting PUSCH data in different time slots.
  • the terminal device may determine the number of REs for carrying information bits included in each PRB corresponding to the PUSCH in at least two time slots.
  • the terminal device may determine the number of REs for carrying information bits included in each PRB corresponding to the PDSCH in at least two time slots.
  • formula (1) the formula for calculating the number of valid REs N' REs included in each PRB corresponding to the PUSCH or PDSCH in at least two time slots is shown in formula (1):
  • N' RE the calculation formula of N' RE can be as shown in formula (2-1) or formula (2-2) or formula (2-3) or formula (2-4):
  • the total symbol length of the PUSCH or PDSCH scheduled for the network device (ie, the length of an OFDM symbol included in the time domain), the PUSCH or PDSCH spans at least two time slots in the time domain. is the number of REs included in the DMRS CDM group that does not transmit data included in the scheduled PUSCH or PDSCH symbols, Overhead configured for higher layer signaling.
  • the terminal device determines the TBS according to the number of REs included in each PRB for carrying information bits.
  • the terminal device may determine the number of REs used for carrying information bits included in the N PRBs corresponding to the terminal device according to the number of REs used to carry information bits included in each PRB, where N is indicated by the network device, and N is greater than or equal to 1 .
  • N RE min(156 ⁇ (M end -M start +1),N' RE ) ⁇ n PRB formula (3-1)
  • n PRB is the value of N, that is, the number of PRBs allocated by the network device to the terminal device.
  • M start is the start slot index of the scheduled PUSCH or PDSCH
  • Men end is the end slot index of the scheduled PUSCH or PDSCH.
  • N' RE may be determined according to formula (1) or formula (2-1) or formula (2-2) or formula (2-3) or formula (2-4).
  • the PRBs corresponding to the first time slot and/or the second time slot respectively include more than 156 REs for carrying information bits.
  • a maximum of 156 valid REs in a PRB in a time slot are defined.
  • the case where no DMRS is sent in one time slot can be supported, and at this time, the number of valid REs of one PRB in one time slot can be greater than 156.
  • N RE the calculation formula of N RE can be formula (4):
  • N RE N' RE ⁇ n PRB formula (4)
  • the influence of the DMRS overhead limitation is removed, the upper limit of the number of valid REs in each PRB is increased, and the TBS can be made larger and more data can be transmitted.
  • the terminal device can determine the information bits of the data that can be transmitted in at least two time slots according to the corresponding code rate, modulation mode and transmission layer number of the terminal device and the number of REs included in the N PRBs for carrying information bits. number, as shown in formula (5):
  • N info N RE ⁇ R ⁇ Q m ⁇ Equation (5)
  • N info is the number of information bits of data that can be transmitted by at least two time slots
  • R is the code rate
  • Q m is the modulation mode
  • ⁇ is the number of layers or streams to be transmitted.
  • the terminal device can determine the TBS according to the number of information bits of data that can be transmitted in at least two time slots.
  • the terminal device can determine the TBS according to the number of information bits of data that can be transmitted in at least two time slots.
  • the standard document 3GPP TS 38.214 please refer to the standard document 3GPP TS 38.214, which will not be repeated here.
  • the network device may also determine the number of REs included in each PRB in the at least two time slots for carrying information bits, and the number of REs included in each PRB for carrying information bits is based on the number of REs included in each PRB
  • the number of carriers, the number of OFDM symbols of the PUSCH or PDSCH included in the at least two time slots, and the overhead of each time slot in the at least two time slots are determined; wherein, the at least two time slots include the first time slot and the second time slot. Two time slots, the overheads of the first time slot and the second time slot are different; the TBS is determined according to the number of REs included in each PRB for carrying information bits.
  • the number of PUSCH or PDSCH OFDM symbols in each time slot in at least two time slots and the overhead of each time slot are considered, so that TBS can be calculated more accurately. It is conducive to the improvement of resource utilization, and avoids data transmission errors and resource waste caused by inaccurate TBS calculation. For example, on the one hand, it avoids unnecessary retransmission caused by too large calculated TBS, resulting in waste of resources and increased delay in retransformation; waste problem.
  • an embodiment of the present application provides a method for determining TBS, which can calculate TBS based on a scaling factor, including:
  • the network device sends control information to the terminal device.
  • Control information may be used to indicate each time slot used to transmit data, where one time slot may transmit one TB. That is, 1 TB can be mapped to 1 time slot.
  • the control information may be DCI, for example.
  • the terminal device receives the control information sent by the network device.
  • the terminal device determines the number of REs included in each PRB in each time slot for carrying information bits.
  • formula (6) the formula for calculating the number of valid REs included in each PRB corresponding to the PUSCH or PDSCH in each time slot is shown in formula (6):
  • a time slot may include silent REs. Due to the introduction of the silent RE, it is equivalent to adding an extra overhead of one time slot, and the UK considers this kind of overhead in the TBS calculation. Therefore, the calculation formula of N' RE can be updated to formula (7):
  • the terminal device determines the TBS according to the number of REs included in each PRB for carrying information bits.
  • N RE is the number of REs used to carry information bits included in the N PRBs corresponding to the terminal device
  • K is the scaling factor
  • the value of the scaling factor of TBS (that is, K) is based on the number of REs used for carrying information bits included in the N PRBs corresponding to the terminal device in at least two time slots and the number of REs used by the terminal device in at least two time slots The number of REs for carrying information bits included in the N PRBs corresponding to the first time slot of .
  • the overhead of silent REs can also be included in In this way, the calculation formula of K can still be formula (9).
  • calculation formula of K can be formula (11-1) or formula (11-2) or formula (11-3) or formula (11-4):
  • M start is the start slot index of the scheduled PUSCH or PDSCH, and other parameters can refer to formula ( 2-2) or the relevant description of the formula (2-3) or the formula (2-4), which is not repeated here.
  • the terminal device can determine the information bits of the data that can be transmitted in at least two time slots according to the corresponding code rate, modulation mode and transmission layer number of the terminal device and the number of REs included in the N PRBs for carrying information bits. number, as shown in formula (12):
  • N info N RE ⁇ R ⁇ Q m ⁇ Equation (12)
  • N RE is determined according to formula (8-1) or formula (8-2), and the meanings of other parameters can refer to the relevant description of formula (5), which will not be repeated here.
  • the terminal device can determine the TBS according to the number of information bits of data that can be transmitted in at least two time slots.
  • the detailed process can refer to the standard document 3GPP TS 38.214.
  • the number of PUSCH or PDSCH OFDM symbols in each time slot in at least two time slots and the overhead of each time slot are considered, so that TBS can be calculated more accurately. It is conducive to the improvement of resource utilization, and avoids data transmission errors and resource waste caused by inaccurate TBS calculation. For example, on the one hand, it avoids unnecessary retransmissions caused by too large calculated TBS, resulting in wasted resources and increased delay; waste problem.
  • FIG. 10 shows a possible schematic structural diagram of the apparatus 10 involved in the above embodiment
  • the apparatus may be a terminal device, and the terminal device includes: a receiving unit 1001 and processing unit 1002.
  • the receiving unit 1001 is configured to receive the control information sent by the network device, and determine at least two time slots for data transmission according to the control information of the present application;
  • the processing unit 1002 is configured to determine the at least two time slots of the present application
  • the number of resource unit REs used for carrying information bits included in each physical resource block PRB in the time slot, and the number of REs used for carrying information bits included in each PRB in this application is based on the subcarriers included in each PRB in this application
  • the number of OFDM symbols, the number of OFDM symbols of the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH included in the at least two time slots of this application, and the overhead of each time slot in the at least two time slots of this application are determined;
  • the application for at least two time slots includes a first time slot and a second time slot, and the overhead of the first time slot of this application and the second time slot of this application are different, or the first time slot of this application and the second time slot of this application include The number of
  • the receiving unit 1001 is configured to execute the process 502 in FIG. 5 , and is configured to execute the process 902 in FIG. 9 .
  • the processing unit 1001 is used for executing the processes 503 and 504 in FIG. 5 , and is used for executing the processes 903 and 904 in FIG. 9 .
  • FIG. 11 shows a possible schematic structural diagram of the apparatus 11 involved in the above embodiment
  • the apparatus may be a network device, and the network device includes: a sending unit 1101 and processing unit 1102.
  • the sending unit 1101 is configured to send control information to the terminal device, where the control information is used to indicate at least two time slots for data transmission;
  • the processing unit is configured to determine each of the at least two time slots
  • the number of resource unit REs included in the physical resource block PRB for carrying information bits, the number of REs included in each PRB for carrying information bits is based on the number of subcarriers included in each PRB, and at least two time slots include The number of OFDM symbols of the physical uplink shared channel PUSCH or physical downlink shared channel PDSCH, and the overhead of each time slot in the at least two time slots are determined; wherein, the at least two time slots include the first time slot and the second time slot.
  • the processing unit 1102 is further configured to The number of REs used to carry information bits determines the TBS.
  • the sending unit 1101 is configured to execute the process 501 in FIG. 5 and the process 901 in FIG. 9 .
  • the sending unit 1101 is configured to execute the process 501 in FIG. 5 and the process 901 in FIG. 9 .
  • all relevant contents of the steps involved in the above method embodiments can be cited in the functional descriptions of the corresponding functional modules, which will not be repeated here.
  • the division of modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be other division methods.
  • the functional modules in the various embodiments of the present application may be integrated into one processing unit. In the device, it can also exist physically alone, or two or more modules can be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
  • the receiving unit and the sending unit may be integrated into the transceiver unit.
  • the methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented in software, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium can be any available media that can be accessed by a computer, or a data storage device such as a server, data center, etc. that includes one or more available media integrated.
  • the available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, digital video discs (DVDs)), or semiconductor media (eg, solid state drives (SSDs) )Wait.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente demande concernent un procédé de détermination de TBS, associé au domaine des communications, et capable d'empêcher une imprécision de calcul de TBS conduisant à des erreurs de transmission de données et à un gaspillage de ressources. Le procédé consiste à : recevoir des informations de commande transmises par un dispositif de réseau et déterminer, sur la base des informations de commande, au moins deux intervalles utilisés pour transmettre des données; déterminer le nombre d'éléments de ressource (RE) que chaque PRB dans les au moins deux fentes comprend et utilise pour porter des bits d'informations, le nombre de RE que chaque PRB comprend et utilise pour porter des bits d'informations qui sont déterminés sur la base du nombre de sous-porteuses que chaque PRB comprend, du nombre de symboles OFDM d'un PUSCH ou d'un PDSCH que les au moins deux fentes comprennent, et de la tête de chaque fente dans les au moins deux fentes, lesdites au moins deux fentes comprend une première fente et une seconde fente, le surdébit de la première fente est différent de celui de la seconde fente, ou le nombre de symboles OFDM du PUSCH ou du PDSCH que la première fente comprend est différent de celui de la seconde fente; et déterminer une TBS sur la base du nombre de RE que chaque PRB comprend et utilise pour porter des bits d'informations. Les modes de réalisation de la présente demande sont applicables dans NR 5G.
PCT/CN2020/133174 2020-12-01 2020-12-01 Procédé de détermination de tbs WO2022116014A1 (fr)

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PCT/CN2020/133174 WO2022116014A1 (fr) 2020-12-01 2020-12-01 Procédé de détermination de tbs
PCT/CN2021/086029 WO2022116458A1 (fr) 2020-12-01 2021-04-08 Procédé de détermination de tbs
CN202180079555.8A CN116530137A (zh) 2020-12-01 2021-04-08 一种tbs确定方法

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