WO2024094030A1

WO2024094030A1 - Tbs determining method and apparatus, and storage medium

Info

Publication number: WO2024094030A1
Application number: PCT/CN2023/128890
Authority: WO
Inventors: 焦淑蓉; 花梦; 李军
Original assignee: 华为技术有限公司
Priority date: 2022-11-04
Filing date: 2023-10-31
Publication date: 2024-05-10
Also published as: CN117998592A

Abstract

A TBS determining method and apparatus, and a storage medium, relating to the technical field of communications. The method can be performed by a terminal device or a network device. The method comprises: according to frequency domain resource information of a first channel and frequency domain resource information of a first sub-band, determining the number of PRBs used by the first channel for transmitting the first channel in a first timeslot, the first sub-band on at least one symbol in time domain resources of the first channel being not used for transmitting the first channel; according to the number of PRBs used by the first channel for transmitting the first channel in the first timeslot, determining the number of REs used by the first channel for transmitting the first channel in the first timeslot; and according to the number of REs used by the first channel for transmitting the first channel in the first timeslot, determining the TBS of a transport block carried on the first channel in the first timeslot. The method can improve the accuracy of the TBS.

Description

A TBS determination method, device and storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to a Chinese patent application filed with the Chinese Patent Office on November 4, 2022, with application number 202211380844.4 and application name “A TBS determination method, device and storage medium”, the entire contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the field of communication technology, and in particular to a TBS determination method, device and storage medium.

Background technique

In a subband full duplex (SBFD) system, for a downlink time slot configured with an uplink subband, if the physical downlink shared channel (PDSCH) to be scheduled crosses the uplink subband, the terminal device needs to avoid the uplink subband for PDSCH reception. Similarly, for an uplink time slot configured with a downlink subband, if the physical uplink shared channel (PUSCH) to be scheduled crosses the downlink subband, the terminal device needs to avoid the downlink subband for PUSCH reception.

In the SBFD system, for downlink time slots configured with uplink subbands, the related technology does not consider the resources occupied by the uplink subband when determining the transport block size (TBS), resulting in the number of physical resource blocks (PRBs) actually used by the terminal device not matching the number of PRBs indicated in the downlink control information (DCI), which in turn increases the actual transmission bit rate and affects the transmission performance. Similarly, for uplink time slots configured with downlink subbands, the related technology does not consider the resources occupied by the downlink subband when determining the TBS, which also leads to similar problems.

Summary of the invention

The embodiments of the present application provide a TBS determination method, device, and storage medium, which are used to consider the overlap between channels and subbands when determining TBS for a subband full-duplex scenario, thereby improving the accuracy of TBS.

In a first aspect, a TBS determination method is provided, which can be applied to a terminal device or a network device, and includes: determining the number of physical resource blocks (PRBs) used by the first channel in a first time slot for transmitting the first channel according to frequency domain resource information of the first channel and frequency domain resource information of the first subband; determining the number of resource units RE used by the first channel in the first time slot for transmitting the first channel according to the number of PRBs used by the first channel in the first time slot for transmitting the first channel; and determining the TBS of the transport block carried on the first channel in the first time slot according to the number of REs used by the first channel in the first time slot for transmitting the first channel. The first subband on at least one symbol in the time domain resource of the first channel is not used for transmitting the first channel, and the first time slot is the time slot where the time domain resource of the first channel is located, or the first time slot is one of at least two time slots where the time domain resource of the first channel is located.

In the above implementation method, for the sub-band full-duplex scenario, the terminal device considers the overlap between the first channel and the first sub-band when determining the TBS. When determining the number of PRBs of the first channel in the first time slot, it is based not only on the frequency domain resource information of the first channel, but also on the frequency domain resource information of the first sub-band. Therefore, the number of PRBs of the first channel used to transmit the first channel in the first time slot can be determined, so that the TBS determined based on this is more suitable for the transmission resources of the first channel, thereby improving the accuracy of the TBS and ensuring the transmission performance.

In one possible implementation, determining the number of PRBs used by the first channel in the first time slot to transmit the first channel based on the frequency domain resource information of the first channel and the frequency domain resource information of the first subband includes: subtracting the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, to obtain the number of PRBs used by the first channel in the first time slot to transmit the first channel, the unavailable PRBs including the PRBs in the first time slot indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the first time slot indicated by the frequency domain resource information of the first subband.

In the above implementation, for the sub-band full-duplex scenario, the terminal device considers the overlap between the first channel and the first sub-band when determining the TBS, and when determining the number of PRBs of the first channel in the first time slot, subtracts the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel. Therefore, the number of PRBs of the first channel used to transmit the first channel in the first time slot can be determined, so that the TBS determined based on this is more suitable for the transmission resources of the first channel, thereby improving the accuracy of the TBS and ensuring the transmission performance.

In one possible implementation, the subtracting the unusable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel includes: if a first condition is met, subtracting the unusable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel; wherein the first condition includes: a ratio of M1 to L1 is greater than or equal to a first threshold, L1 is the number of symbols of the first channel in the first time slot, M1 is the number of symbols of the first channel overlapping with the first subband in the first time slot, M1 and L1 are both integers greater than or equal to 1, and M1 is less than or equal to L1.

The above-mentioned implementation method can subtract the unusable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel when the number of symbols in the first sub-band accounts for a high proportion. Therefore, the number of PRBs determined by the first channel in the first time slot for transmitting the first channel can be more accurate. In other words, the number of PRBs determined by this method is more consistent with the number of PRBs that can actually be used by the first channel in the first time slot to transmit the first channel.

In a possible implementation, the method also includes: determining the number of REs in the first PRB of the first channel according to the time domain resource information of the first channel; the determining the number of REs used by the first channel to transmit the first channel in the first time slot according to the number of PRBs used by the first channel to transmit the first channel in the first time slot includes: determining the number of REs used by the first channel to transmit the first channel in the first time slot according to the number of REs in the first PRB of the first channel and the number of PRBs used by the first channel to transmit the first channel in the first time slot.

Optionally, the number of REs in the first PRB of the first channel satisfies the following formula:

Wherein, _N′RE is the number of REs in the first PRB of the first channel, is the number of subcarriers in a PRB, is the number of symbols allocated to the first channel in a time slot, is the number of REs for DMRS on a PRB, Configured by high-level; among them, With high-level configuration Different, the Used to determine the number of REs in a PRB for a second channel, where frequency domain resources of all symbols in the second channel have no overlap with the first subband.

In the above implementation, for the sub-band full-duplex scenario, The optimization has been carried out so that TBS can be more adaptable to the total number of transmission resources and ensure transmission performance.

Optionally, the The value of is determined according to the relationship between the first ratio and the set threshold, wherein the first ratio is M1/L1, the M1 is the number of symbols of the first channel overlapping with the first subband in the first time slot, and the N1 is the number of symbols of the first channel in the first time slot.

In a possible implementation, determining the number of PRBs used by the first channel in the first time slot to transmit the first channel according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband includes: subtracting the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel to obtain the first number of PRBs, where the first number of PRBs is the number of PRBs used by the first channel to transmit the first channel on at least one symbol in the first time slot; determining the number of REs used by the first channel in the first time slot to transmit the first channel according to the number of PRBs used by the first channel in the first time slot includes: The number of REs for transmitting the first channel on the M1 symbols is determined according to the number of symbols of the symbol and the number of the first PRBs, where the M1 symbols are symbols corresponding to the at least one symbol; the number of REs for transmitting the first channel on the L1′ symbols is determined according to the number of symbols of the L1′ symbols and the number of PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, where L1′=L1-M1, and L1 is the number of symbols of the first channel in the first time slot; the number of REs for transmitting the first channel on the M1 symbols is added to the number of REs for transmitting the first channel on the L1′ symbols to obtain the number of REs for transmitting the first channel on the first channel in the first time slot.

The above implementation method can determine the number of PRBs and the number of REs respectively for symbols in the first channel that overlap with the first subband and symbols that do not overlap with the first subband in different ways. Therefore, the number of REs determined in the first channel for transmitting the first channel in the first time slot can be more accurate. In other words, the number of REs determined in this way is more consistent with the number of REs that can actually be used to transmit the first channel in the first time slot.

Optionally, the number of REs used to transmit the first channel on the M1 symbols satisfies the following formula:

The number of REs used to transmit the first channel on the L1′ symbols satisfies the following formula:

Wherein, N _RE,M1 is the number of REs used to transmit the first channel on the M1 symbols, is the number of REs of the demodulation reference signal DMRS on the M1 symbols, Configured by high level or N _RE,L1′ is the number of L1′ symbols used for the number of REs transmitting the first channel, is the number of REs of DMRS on the L1′ symbols, Configured by high level or is the number of subcarriers in a PRB, n _PRB is the number of PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, and n _{over subband} is the number of PRBs in the first time slot indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the first time slot indicated by the frequency domain resource information of the first subband.

In a possible implementation, subtracting the unusable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel includes: subtracting the unusable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel according to the first indication information sent by the network device. This time slot method can improve system flexibility.

Optionally, the first indication information is used to indicate whether to subtract the PRBs in a time slot indicated by the frequency domain resource information of the first subband from the PRBs in a time slot indicated by the frequency domain resource information of the first channel.

Optionally, the first indication information is carried in RRC signaling or DCI.

In one possible implementation, if the transmission block is repeatedly transmitted in K time slots, the K time slots are K time slots in the time slots where the time domain resources of the first channel are located, the K time slots include the first time slot, and K is an integer greater than 1, then the TBS of the transmission block carried on the first channel in each time slot of the K time slots except the first time slot is the same as the TBS of the transmission block carried on the first channel in the first time slot.

This implementation improves the solution for repeated transmission in a sub-band full-duplex scenario.

In a possible implementation, if the transmission block is repeatedly transmitted in K time slots, the K time slots are K time slots in the time slots where the time domain resources of the first channel are located, the K time slots include the first time slot, and K is an integer greater than 1, then the method further includes: determining the TBS of the transmission block carried on the first channel in each time slot of the K time slots except the first time slot; selecting the maximum or minimum value of the TBS of the transmission block carried on the first channel in the K time slots, and determining the maximum or minimum value as the TBS of the transmission block carried on the first channel in each time slot of the K time slots. This implementation improves the solution for repeated transmission in a sub-band full-duplex scenario.

Optionally, the K time slots include a second time slot, which is different from the first time slot, and the separately determining the TBS of the transmission block carried on the first channel in each time slot of the K time slots except the first time slot includes: determining the number of PRBs used by the first channel to transmit the first channel in the second time slot according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband; determining the number of REs used by the first channel to transmit the first channel in the second time slot according to the number of PRBs used by the first channel to transmit the first channel in the second time slot; determining the TBS of the transmission block carried on the first channel in the second time slot according to the number of REs used by the first channel to transmit the first channel in the second time slot.

Optionally, determining the number of PRBs used by the first channel in the second time slot to transmit the first channel based on the frequency domain resource information of the first channel and the frequency domain resource information of the first subband includes: subtracting unavailable PRBs of the first channel in the second time slot from the PRBs of the first channel in the second time slot indicated by the frequency domain resource information of the first channel, to obtain the number of PRBs used by the first channel in the second time slot to transmit the first channel, the unavailable PRBs including PRBs in the second time slot indicated by the frequency domain resource information of the first channel that overlap with PRBs in the second time slot indicated by the frequency domain resource information of the first subband.

Optionally, subtracting the unusable PRBs of the first channel in the second time slot from the PRBs of the first channel in the second time slot indicated by the frequency domain resource information of the first channel includes: if the second condition is met, subtracting the unusable PRBs of the first channel in the second time slot from the PRBs of the first channel in the second time slot indicated by the frequency domain resource information of the first channel; wherein the second condition includes: the ratio of M2 to L2 is greater than or equal to a second threshold, L2 is the number of symbols of the first channel in the second time slot, M2 is the number of symbols of the first channel overlapping with the first subband in the second time slot, and both M2 and L2 are integers greater than or equal to 1, and M2 is less than or equal to L2.

Optionally, the subtracting the unusable PRBs of the first channel in the second time slot from the PRBs of the first channel in the second time slot indicated by the frequency domain resource information of the first channel includes: if a third condition is met, subtracting the unusable PRBs of the first channel in the second time slot from the PRBs of the first channel in the second time slot indicated by the frequency domain resource information of the first channel; wherein the third condition includes: the ratio of K’ to the K is greater than or equal to a third threshold, the first channel overlaps with the first subband in each time slot of the K’ time slots, the K’ is an integer greater than or equal to 1, and the K’ is less than or equal to the K.

In a possible implementation, the number of REs used for transmitting the first channel in the first time slot according to the first channel is The method for determining the TBS of the transmission block carried on the first channel in the first time slot comprises: determining a first intermediate value according to the number of REs used by the first channel for transmitting the first channel in the first time slot, a first proportional factor, the coding rate of the first channel, the modulation order of the first channel, and the number of layers; performing a table lookup according to the first intermediate value to obtain the TBS of the transmission block carried on the first channel in the first time slot; wherein the first proportional factor is different from the second proportional factor, the second proportional factor is used to determine the TBS for the second channel, and the frequency domain resources of all symbols in the second channel have no overlap with the first subband.

The above implementation method can optimize the scaling factor S so that the TBS can be more adapted to the total number of transmission resources and ensure transmission performance.

Optionally, the first proportional factor is determined according to the relationship between a first ratio and a set threshold, the first ratio is M1/L1, the M1 is the number of symbols of the first channel overlapping with the first subband in the first time slot, and the L1 is the number of symbols of the first channel in the first time slot.

In one possible implementation, before determining the number of physical resource blocks (PRBs) of the first channel used to transmit the first channel in the first time slot based on the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the method also includes: acquiring time-frequency resource information of the first channel and the time-frequency resource information of the first subband sent by a network device.

In one possible implementation, before determining the number of physical resource blocks (PRBs) of the first channel used to transmit the first channel in the first time slot based on the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the method also includes: allocating time-frequency resource information of the first channel and the time-frequency resource information of the first subband to the terminal device.

In a possible implementation manner, the first channel is a physical downlink shared channel (PDSCH), or the first channel is a physical uplink shared channel (PUSCH).

According to a second aspect, a communication device is provided, comprising: a processing unit and a transceiver unit; the processing unit is used to: determine the number of physical resource blocks (PRBs) used by the first channel in the first time slot to transmit the first channel according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the first subband on at least one symbol in the time domain resources of the first channel is not used to transmit the first channel, the first time slot is the time slot where the time domain resources of the first channel are located, or the first time slot is one of at least two time slots where the time domain resources of the first channel are located; determine the number of resource units (REs) used by the first channel in the first time slot to transmit the first channel according to the number of PRBs used by the first channel in the first time slot to transmit the first channel; determine the TBS of the transmission block carried on the first channel in the first time slot according to the number of REs used by the first channel in the first time slot to transmit the first channel.

In one possible implementation, the processing unit is used to: subtract the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, to obtain the number of PRBs of the first channel used to transmit the first channel in the first time slot, the unavailable PRBs including the PRBs in the first time slot indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the first time slot indicated by the frequency domain resource information of the first subband.

Optionally, the processing unit is specifically used to: if a first condition is met, subtract the unavailable PRB of the first channel in the first time slot from the PRB of the first channel in the first time slot indicated by the frequency domain resource information of the first channel; wherein the first condition includes: the ratio of M1 to L1 is greater than or equal to a first threshold, L1 is the number of symbols of the first channel in the first time slot, M1 is the number of symbols of the first channel overlapping with the first subband in the first time slot, M1 and L1 are both integers greater than or equal to 1, and M1 is less than or equal to L1.

In one possible implementation, the processing unit is also used to: determine the number of REs in the first PRB of the first channel based on the time domain resource information of the first channel; determine the number of REs used by the first channel in the first time slot to transmit the first channel based on the number of REs in the first PRB of the first channel and the number of PRBs used by the first channel in the first time slot to transmit the first channel.

Optionally, the The value of is determined according to the relationship between the first ratio and the set threshold, the first ratio is M1/L1, the M1 is the number of symbols overlapped by the first channel in the first time slot with the first sub-band, and the N1 is the number of symbols overlapped by the first channel in the first time slot. The number of symbols in a time slot.

In a possible implementation, the processing unit is specifically used to: subtract the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel to obtain a first PRB number, where the first PRB number is the number of PRBs used by the first channel to transmit the first channel on at least one symbol in the first time slot; determine the number of REs used to transmit the first channel on the M1 symbols according to the number of symbols of M1 symbols and the first PRB number, where the M1 symbol is a symbol corresponding to the at least one symbol; determine the number of REs used to transmit the first channel on the L1′ symbols according to the number of symbols of L1′ symbols and the number of PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, where L1′=L1-M1, and L1 is the number of symbols of the first channel in the first time slot; add the number of REs used to transmit the first channel on the M1 symbols to the number of REs used to transmit the first channel on the L1′ symbols to obtain the number of REs used by the first channel to transmit the first channel in the first time slot.

Wherein, N _RE,M1 is the number of REs used to transmit the first channel on the M1 symbols, is the number of REs of the demodulation reference signal DMRS on the M1 symbols, Configured by high level or N _RE,L1′ is the number of REs used to transmit the first channel on the L1′ symbols, is the number of REs of DMRS on the L1′ symbols, Configured by high level or is the number of subcarriers in a PRB, n _PRB is the number of PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, and n _{over subband} is the number of PRBs in the first time slot indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the first time slot indicated by the frequency domain resource information of the first subband.

In one possible implementation, the processing unit is specifically used to: according to first indication information sent by the network device, subtract the unavailable PRB of the first channel in the first time slot from the PRB of the first channel in the first time slot indicated by the frequency domain resource information of the first channel.

In one possible implementation, if the transmission block is repeatedly transmitted in K time slots, the K time slots are K time slots in the time slots where the time domain resources of the first channel are located, the K time slots include the first time slot, and K is an integer greater than 1, then the processing unit is also used to: separately determine the TBS of the transmission block carried on the first channel in each time slot of the K time slots except the first time slot; select the maximum value or minimum value of the TBS of the transmission block carried on the first channel in the K time slots, and determine the maximum value or minimum value as the TBS of the transmission block carried on the first channel in each time slot of the K time slots.

In one possible implementation, the K time slots include a second time slot, which is different from the first time slot, and the processing unit is specifically used to: determine the number of PRBs used by the first channel to transmit the first channel in the second time slot based on the frequency domain resource information of the first channel and the frequency domain resource information of the first subband; determine the number of REs used by the first channel to transmit the first channel in the second time slot based on the number of PRBs used by the first channel to transmit the first channel in the second time slot; determine the TBS of the transmission block carried on the first channel in the second time slot based on the number of REs used by the first channel to transmit the first channel in the second time slot.

Optionally, the processing unit is specifically used to: subtract the unavailable PRBs of the first channel in the second time slot from the PRBs of the first channel in the second time slot indicated by the frequency domain resource information of the first channel, to obtain the number of PRBs of the first channel used to transmit the first channel in the second time slot, the unavailable PRBs including the PRBs in the second time slot indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the second time slot indicated by the frequency domain resource information of the first subband.

Optionally, the processing unit is specifically used to: if the second condition is met, subtract the unavailable PRB of the first channel in the second time slot from the PRB of the first channel in the second time slot indicated by the frequency domain resource information of the first channel; wherein the The second condition includes: the ratio of M2 to L2 is greater than or equal to a second threshold, L2 is the number of symbols of the first channel in the second time slot, M2 is the number of symbols of the first channel overlapping with the first subband in the second time slot, M2 and L2 are both integers greater than or equal to 1, and M2 is less than or equal to L2.

Optionally, the processing unit is specifically used to: if a third condition is met, subtract the unavailable PRB of the first channel in the second time slot from the PRB of the first channel in the second time slot indicated by the frequency domain resource information of the first channel; wherein the third condition includes: the ratio of K’ to the K is greater than or equal to a third threshold, the first channel overlaps with the first subband in each of the K’ time slots, the K’ is an integer greater than or equal to 1, and the K’ is less than or equal to the K.

In one possible implementation, the processing unit is specifically used to: determine a first intermediate value based on the number of REs used by the first channel to transmit the first channel in the first time slot, a first proportional factor, the coding rate of the first channel, the modulation order of the first channel, and the number of layers, and perform a table lookup based on the first intermediate value to obtain the TBS of the transmission block carried on the first channel in the first time slot; wherein the first proportional factor is different from the second proportional factor, the second proportional factor is used to determine the TBS for the second channel, and the frequency domain resources of all symbols in the second channel have no overlap with the first subband.

In one possible implementation, the processing unit is also used to: before determining the number of physical resource blocks (PRBs) of the first channel used to transmit the first channel in the first time slot based on the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, obtain the time-frequency resource information of the first channel and the time-frequency resource information of the first subband sent by the network device.

In one possible implementation, the processing unit is also used to: allocate time-frequency resource information of the first channel and time-frequency resource information of the first subband to the terminal device before determining the number of physical resource blocks (PRBs) of the first channel used to transmit the first channel in the first time slot based on the frequency domain resource information of the first channel and the frequency domain resource information of the first subband.

In a possible implementation manner, the first channel is a PDSCH, or the first channel is a PUSCH.

According to a third aspect, a communication device is provided, comprising: one or more processors; wherein, when instructions of one or more computer programs are executed by the one or more processors, the communication device executes a method as described in any one of the above-mentioned first aspects.

According to a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a computer program, and when the computer program is executed on a computing device, the computing device executes the method as described in any one of the above-mentioned first aspects.

In a fifth aspect, a chip is provided, wherein the chip is coupled to a memory and is used to read and execute program instructions stored in the memory to implement a method as described in any one of the above-mentioned first aspects.

In a sixth aspect, a communication system is provided, the communication system comprising a network device and a terminal device, the network device can execute any method as described in the first aspect, and the terminal device can execute any method as described in the first aspect.

According to a seventh aspect, a computer program product is provided. When the computer program product is called by a computer, the computer executes the method as described in any one of the first aspects.

For the beneficial effects of the second to seventh aspects above, please refer to the beneficial effects of the first aspect and will not be repeated.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a search space set;

FIG2 is a schematic diagram of time-frequency resources for FDD, TDD and SBFD;

FIG3 is a schematic diagram of the architecture of a mobile communication system used in an embodiment of the present application;

FIG4 is a flow chart of a TBS determination method implemented on a terminal device side according to an embodiment of the present application;

FIG5 is a schematic diagram of repeated transmission in one embodiment of the present application;

FIG6 is a second schematic diagram of repeated transmission in an embodiment of the present application;

FIG7 is a schematic diagram of a flow chart of interaction between a network device and a terminal device provided in an embodiment of the present application;

FIG8 is a flow chart of a TBS determination method implemented on a network device side according to an embodiment of the present application;

FIG9 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

FIG. 10 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described below in conjunction with the accompanying drawings. Detailed description.

It should be understood that in this application, "at least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character "/" generally indicates that the objects associated with each other are in an "or" relationship. "At least one of the following" or its similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b and c can represent: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a, b and c. Wherein a, b and c can be single or multiple. The terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions, such as, for example, inclusion of a series of steps or units. Methods, systems, products or apparatus are not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatus.

The following first describes the relevant technologies involved in the embodiments of the present application.

(a) Data scheduling in new radio (NR) systems.

In the NR system, the physical downlink control channel (PDCCH) carries DCI. The DCI carried by the PDCCH that schedules PDSCH/PUSCH contains two fields: frequency domain resource assignment and time domain resource assignment. The terminal device determines a time-frequency resource block based on the information in these two fields, and PDSCH/PUSCH will be transmitted in this resource block.

According to different uses and contents, DCI is divided into many formats and scrambled by different radio network temporary identities (RNTI), such as RA-RNTI (random access-RNTI), P-RNTI (pagging-RNTI), etc. The PDCCH information of different users is distinguished by their corresponding C-RNTI (cell-RNTI) information, that is, the cyclic redundancy check (CRC) of DCI is scrambled by C-RNTI. The base station configures the terminal device with a set of candidate PDCCHs that need to monitor DCI through high-level signaling, such as radio resource control (RRC) signaling. Since the terminal device does not know in advance which candidate PDCCH (PDCCH candidate) the base station will receive DCI on, but the terminal device knows what downlink control information it currently expects to receive based on the base station configuration information, the terminal device attempts to decode each candidate PDCCH in this set based on the configuration information, that is, the terminal device uses the corresponding RNTI to perform a CRC check on the information on the PDCCH candidate. If the CRC check succeeds, the terminal device can obtain the successfully decoded DCI information. This set of candidate PDCCHs is the search space set. The behavior of the terminal device attempting to decode each candidate PDCCH to determine whether the corresponding DCI is received is called blind detection (BD).

FIG. 1 exemplarily shows a search space set. As shown in FIG. 1 , the search space can be divided into a common search space and a terminal-specific search space. A search space can include alternative PDCCHs with the same or different control channel element (CCE) aggregation levels (AL). The aggregation levels can include AL=1, AL=2, AL=4, and AL=8.

A search space set consists of multiple PDCCH candidates, and different PDCCH candidates may overlap with each other. In addition, the network side can configure multiple search spaces for the terminal device at the same time to detect DCIs of different formats or DCIs carrying different control information. These search spaces may not overlap, may overlap partially or completely, that is, the candidate PDCCHs constituting different search spaces may overlap with each other.

If the terminal device successfully blindly detects the DCI on the PDCCH, it can obtain the PDSCH time-frequency resources and/or PUSCH time-frequency resources indicated by the DCI for the terminal device, so that the terminal device can perform downlink reception on the PDSCH or uplink transmission on the PUSCH.

(ii) Determination of TBS of PDSCH/PUSCH.

Before decoding data on the PDSCH, the terminal device first determines the transport block size (TBS) of the data received on the PDSCH. Similarly, before sending data on the PUSCH, the terminal device first determines the transport block size (TBS) of the data sent on the PUSCH.

In the related art, in order to determine the TBS on the PDSCH, the terminal device performs the following steps:

Step 1: Determine the number of resource elements (REs) allocated to PDSCH in a time slot.

First, determine the number of REs _N'RE in a PRB allocated to PDSCH:

in, is the number of subcarriers in a PRB in the frequency domain, The number of symbols allocated to the PDSCH in a slot; The duration of the allocation is determined based on the higher layer parameters or physical layer parameters. The demodulation reference signal (DM-RS) overhead per PRB on (duration), that is, the number of REs occupied by DM-RS; It is the overhead of the parameter xOverhead in the high-level information unit PDSCH serving cell configuration (IE PDSCH-ServingCellConfig). If it is not configured but is 0.

Then, according to the number of REs in one PRB and the number of PRBs, the total number of REs N _RE allocated to the PDSCH is determined:
N _RE =min(156,N' _RE )·n _PRB ………………………………(2)

Where _nPRB is the total number of PRBs allocated to the PDSCH of the terminal device.

Step 2: Determine the first information bit number N _info :
N _info = N _RE ·R ·Q _m ·υ ……………………………………(3)

Among them, R is the target code rate of PDSCH, _Qm is the modulation order of PDSCH, and v is the number of layers.

Step 3: Perform quantization table lookup and other operations according to N _info to obtain the TBS of the transport block in one time slot of the PDSCH.

If PDSCH is scheduled by DCI format 1_0 and CRC is scrambled by P-RNTI, RA-RNTI or MsgB-RNTI, then the formula (3) in step 2 is multiplied by a scaling factor, namely:
N _info = S·N _RE ·R·Q _m ·υ………………………………(4)

The value of the scaling factor S is determined according to the TB scaling field in the DCI. Table 1 shows the value of the TB scaling field and the corresponding scaling factor S.

Table 1: Correspondence between the value of TB scaling domain and the scale factor S:

The method for the terminal device to determine the TBS of data on the PUSCH is the same as the principle of the method for determining the TBS of data on the PDSCH, and will not be repeated here.

(3) Duplex mode.

Currently, there are frequency division duplex (FDD) and time division duplex (TDD) in NR.

(1) FDD:

As shown in the FDD resources in Figure 2, downlink transmission can be performed on the downlink bandwidth part (DL BWP, where DL is the abbreviation of downlink in English and BWP is the abbreviation of bandwidth part in English) of time slot 0, and uplink transmission can also be performed on the uplink BWP (UL BWP, where UP is the abbreviation of uplink in English) of time slot 0. The DL BWP and UL BWP are located on different carriers and are separated in the frequency domain.

(2)TDD:

As shown in the TDD resources in Figure 2, the center frequency of DL BWP is the same as that of UL BWP, and the bandwidth of DL BWP and UL BWP can be the same or different. At the same time, the terminal device can only perform uplink transmission or downlink transmission. For example, in time slot 0, only downlink transmission can be performed, and in time slot 4, only uplink transmission can be performed. Time slot 3 is a flexible time slot, that is, it can be used for uplink transmission or downlink transmission, but not for uplink transmission and downlink transmission at the same time. The minimum granularity of uplink and downlink transmission switching is a symbol. For example, time slot 3 is a flexible time slot, which is composed of 14 or 12 orthogonal frequency division multiplexing (OFDM) symbols, of which the first M symbols are downlink symbols, the last N symbols are uplink symbols, and the middle 14-M-N (or 12-M-N) symbols are flexible symbols, where M and N are both integers, 0<=M<=14, 0<=N<=14, and M+N<=14. Downlink symbols are used for downlink transmission, uplink symbols are used for uplink transmission, and flexible symbols can be used for both uplink and downlink transmission. The specific transmission direction can be notified to the terminal device by the base station through RRC signaling or DCI scheduling.

Compared with FDD, TDD occupies fewer frequency domain resources, but because uplink and downlink transmissions cannot be performed simultaneously in TDD, the uplink transmission delay will increase.

(3)SBFD:

In order to solve the delay problem of TDD, flexible duplex is being discussed in the standard, which can be understood as complementary TDD (C-TDD), or full duplex, or other names, such as SBFD. Among them, SBFD is discussed more at the current stage. Its core is to configure uplink transmission resources and downlink transmission resources at the same time on a certain symbol or time slot of the TDD system. For example, as shown in the SBFD resource in 2, on time slot 0, there is a frequency domain resource in the downlink BWP, on which uplink transmission can be performed. In this way, uplink transmission can be performed on time slot 0, which reduces the latency of uplink transmission. This frequency domain resource is usually called an uplink subband. At this time, downlink transmission can also be performed on time slot 0. The base station can perform uplink and downlink transmission at the same time on time slot 0. The terminal device can also perform uplink and downlink transmission at the same time on time slot 0. This terminal device is called a full-duplex terminal device. The terminal device can also perform only uplink transmission or downlink transmission on time slot 0. This terminal device is called a half-duplex terminal device. Compared with TDD, SBFD has more uplink resources and can increase uplink coverage.

(iv) SBFD system.

In the current standard discussion, there are four designs for SBFD systems:

(1) The time-frequency resource information of the SBFD subband is transparent to the terminal device, that is, the time-frequency resource information of the SBFD subband is not notified to the terminal device, and no new terminal device behavior is introduced.

(2) The time-frequency resource information of the SBFD subband is transparent to the terminal device, that is, the time-frequency resource information of the SBFD subband is not notified to the terminal device. New terminal device behaviors are introduced for new terminal devices supporting SBFD.

(3) The time domain resource information of the SBFD subband is notified to the terminal device. New terminal device behaviors are introduced for new terminal devices supporting SBFD.

(4) The time-frequency domain resource information of the SBFD subband is notified to the terminal device. New terminal device behaviors are introduced for new terminal devices supporting SBFD.

In the above design (4), the base station notifies the terminal device supporting SBFD of the time-frequency domain resource information of the SBFD subband. The terminal device supporting SBFD can use this information to optimize its transmission behavior, thereby improving performance.

In the SBFD system, for downlink time slots configured with uplink subbands (such as time slots 0 to 2 in the SBFD resources in Figure 2), if the PDSCH to be scheduled spans the uplink subband (i.e., part of the PRBs allocated to the PDSCH is located in the uplink subband), the terminal device can avoid the uplink subband for PDSCH reception. Similarly, for uplink time slots configured with downlink subbands, if the PUSCH to be scheduled spans the downlink subband (i.e., part of the PRBs allocated to the PUSCH is located in the downlink subband), the terminal device can avoid the downlink subband for PUSCH reception.

In the SBFD system, for downlink time slots configured with uplink subbands, the related technology does not consider the resources occupied by the uplink subband when determining the TBS, resulting in the number of PRBs actually used by the terminal device not being consistent with the number of PRBs indicated in the DCI, which in turn leads to an increase in the actual transmission code rate, affecting the transmission performance. Similarly, for uplink time slots configured with downlink subbands, the related technology does not consider the resources occupied by the downlink subband when determining the TBS, which will also lead to similar problems.

Based on this, the embodiment of the present application provides a TBS determination method and a related device for executing the method. By adopting the embodiment of the present application, for the sub-band full-duplex scenario, the situation where the downlink channel overlaps with the uplink sub-band, or the situation where the uplink channel overlaps with the downlink sub-band can be considered when determining the TBS, thereby improving the accuracy of the TBS and further improving the transmission performance.

The embodiments of the present application are described below in conjunction with the accompanying drawings.

Referring to FIG. 3 , it is a schematic diagram of the architecture of the mobile communication system applied in the embodiment of the present application. The mobile communication system includes a core network device 110, a wireless access network device 120 and at least one terminal device (such as the terminal device 130 and the terminal device 140 in the figure). The terminal device is connected to the wireless access network device by wireless means, and the wireless access network device is connected to the core network device by wireless or wired means. The core network device and the wireless access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the wireless access network device can be integrated on the same physical device, or the functions of part of the core network device and part of the wireless access network device can be integrated on one physical device. The terminal device can be fixed or movable. FIG. 3 is only a schematic diagram, and the communication system can also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not drawn in FIG. The embodiment of the present application does not limit the number of core network devices, wireless access network devices and terminal devices included in the mobile communication system.

The wireless access network device is an access device that the terminal device uses to access the mobile communication system wirelessly. It can be a base station NodeB, an evolved base station eNodeB, a base station in an NR mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. The embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device.

Terminal equipment may also be called terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. Terminal equipment may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.

The wireless access network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the application scenarios of the wireless access network equipment and terminal equipment.

The embodiments of the present application can be applied to downlink signal transmission, uplink signal transmission, and device-to-device (D2D) signal transmission. For downlink signal transmission, the sending device is a wireless access network device, and the corresponding receiving device is a terminal device. For uplink signal transmission, the sending device is a terminal device, and the corresponding receiving device is a wireless access network device. For D2D signal transmission, the sending device is a terminal device, and the corresponding receiving device is also a terminal device. The transmission direction of the signal in the embodiments of the present application is not limited.

The wireless access network equipment and the terminal equipment, as well as the terminal equipment and the terminal equipment, may communicate through the licensed spectrum (licensed spectrum), may communicate through the unlicensed spectrum (unlicensed spectrum), or may communicate through the licensed spectrum and the unlicensed spectrum at the same time. The wireless access network equipment and the terminal equipment, as well as the terminal equipment and the terminal equipment, may communicate through the spectrum below 6G, may communicate through the spectrum above 6G, or may communicate through the spectrum below 6G and the spectrum above 6G at the same time. The embodiments of the present application do not limit the spectrum resources used between the wireless access network equipment and the terminal equipment.

Based on the above system architecture, the network device can notify the terminal device supporting SBFD of the time-frequency domain resource information of the SBFD subband. The terminal device supporting SBFD can use this information to optimize its transmission behavior, thereby improving performance.

Based on the system architecture shown in FIG3 , FIG4 shows a TBS determination method implemented on the terminal device side provided by an embodiment of the present application. The method can be executed on a terminal device. The terminal device can be a terminal device supporting SBFD. In the method, the terminal device can determine the number of PRBs used to transmit the first channel in the first channel based on the positional relationship between the first channel and the first subband (the first subband is not used to transmit the first channel), and determine the TBS of the transmission block carried by the first channel based on this.

Referring to FIG. 4 , the method may include the following steps:

S401: A terminal device obtains time-frequency resource information of a first channel and time-frequency resource information of a first subband sent by a network device. The first subband on at least one symbol in the time domain resources of the first channel is not used to transmit the first channel.

It can be understood that the time-frequency resources of the first channel overlap with the time-frequency resources of the first sub-band, or the time-frequency resources of the first channel in the first time slot overlap with the time-frequency resources of the first sub-band. In the embodiment of the present application, the first channel overlaps with the first sub-band in the first time slot, which may include the following meanings:

(1) As long as the frequency domain resource of the first channel in one symbol in the time-frequency resource of the first time slot overlaps with the first sub-band, the first channel overlaps with the first sub-band in the time slot;

(2) If the frequency domain resources of the first channel in M symbols in the time-frequency resources of the first time slot overlap with the first subband, and the ratio M/L of M to L is greater than or equal to the set threshold, then the first channel overlaps with the first subband in the time slot, where L is the number of symbols of the first channel in the time slot.

(3) If the frequency domain resources of the first channel in M symbols in the time-frequency resources of the first time slot overlap with the first subband, and the ratio M/L of M to L is greater than a set threshold, then the first channel overlaps with the first subband in the time slot, where L is the number of symbols of the first channel in the time slot.

Optionally, the first channel may be a downlink channel, which may be a downlink channel for data transmission, such as a PDSCH. The first channel may also be an uplink channel, which may be an uplink channel for data transmission, such as a PUSCH.

Optionally, the first subband may be an SBFD subband, for example, a UL SBFD subband for uplink transmission in a downlink time slot, or a DL SBFD subband for downlink transmission in an uplink time slot. An example of a DL SBFD subband may be shown as an SBFD resource in FIG. 2 .

Taking the first channel as PDSCH as an example, the time domain resource information in the time-frequency resource information of the first channel may include the time domain position information of PDSCH, and the time domain position information of PDSCH may include the time domain starting position (such as the position of the starting symbol) and the time domain length (such as the number of symbols) of PDSCH. If it is repeated transmission, the time domain starting position and time domain length of PDSCH are the time domain starting position and time domain length in one transmission. For example, if PDSCH is repeatedly transmitted 4 times in 4 time slots, the time domain starting position and time domain length indicated by the time domain resource indication information of PDSCH are the starting symbol position and the number of symbols in one of the time slots. The frequency domain resource information in the time-frequency resource information of the first channel may include the frequency domain position information of PDSCH, and the frequency domain position information of PDSCH may include the number of resource blocks (RB) and the position of each RB. Among them, there is a corresponding relationship between RB and PRB, and the corresponding PRB can be obtained after RB is mapped to the physical layer. In some scenarios, RB corresponds to PRB one by one.

Taking the first channel as PUSCH as an example, the time domain resource information in the time-frequency resource information of the first channel may include the time domain resource information of PUSCH Position information, the time domain position information of the PUSCH may include the time domain starting position (such as the position of the starting symbol) and the time domain length (such as the number of symbols) of the PUSCH. If it is a repeated transmission, the time domain starting position and the time domain length of the PUSCH are the time domain starting position and the time domain length in one transmission, or the time domain starting position and the time domain length of the PUSCH are the time domain starting position and the time domain length in the first transmission. The frequency domain resource information in the time-frequency resource information of the first channel may include the frequency domain position information of the PUSCH, and the frequency domain position information of the PUSCH may include the number of RBs and the position of each RB.

Taking the first subband as an SBFD subband as an example, the time domain resource information in the time-frequency resource information of the first subband may include an SBFD time slot index and/or an SBFD symbol index, and the frequency domain resource information in the time-frequency resource information of the first subband may include the frequency domain position information of the SBFD subband in the SBFD time slot and/or SBFD symbol.

SBFD time slot refers to the time slot used by network equipment for SBFD operation, and SBFD symbol refers to the symbol used by network equipment for SBFD operation. SBFD operation means that there are both uplink sub-band and downlink sub-band (the two do not overlap) on a certain frequency band at the same time, and network equipment with full-duplex capability transmits and receives at the same time. For terminal devices in the network, they usually only have half-duplex capability, that is, they either transmit in the uplink sub-band or receive in the downlink sub-band at the same time. The SBFD time slot can be part of the uplink time slot configured in the TDD parameters, or part of the downlink time slot configured in the TDD parameters. It can also be understood that the SBFD time slot is a type of time slot other than the downlink time slot, uplink time slot, and flexible time slot configured in the TDD parameters.

Optionally, the terminal device may also obtain other transmission parameters of the first channel from the network device. The transmission parameters related to determining TBS may include modulation and coding scheme (MCS), the number of layers v when performing multiple input multiple output (MIMO) transmission, and may further include the number of repetitions K (K is an integer greater than or equal to 1). Among them, MCS can be used to determine the modulation order _Qm and the coding rate R of PDSCH or PUSCH, and the number of repetitions K can determine the number of repeated transmissions, and K=1 indicates no repeated transmission. Optionally, the above transmission parameters can be carried in RRC signaling or DCI.

In a possible implementation, the time-frequency resource information of the first channel may be carried in RRC signaling or in physical layer signaling, for example, by indicating the time-frequency resource information of the first channel through DCI carried on PDCCH.

S402: The terminal device determines the number of REs in the first PRB of the first channel according to the time domain resource information of the first channel. This step is optional.

Optionally, taking the first channel as PDSCH as an example, the number of REs in the first PRB of the first channel can be determined by referring to the method for determining the number of REs in a PRB of PDSCH in the related art. The first PRB is any one of the PRBs occupied by the first channel. The first PRB occupies 12 subcarriers in the frequency domain, and the length in the time domain is the number of OFDM symbols allocated to the PDSCH in a time slot.

Exemplarily, taking the first channel as PDSCH as an example, the number of REs in the first PRB of PDSCH can be determined by the following formula:

in, is the number of subcarriers in a PRB, The number of symbols allocated to the PDSCH in a time slot, indicated by the time domain resource information of the PDSCH; It is the DMRS overhead of each PRB over the allocated duration determined according to high-level parameters or physical layer parameters, i.e., the number of REs occupied by DMRS; Instructed by the upper layer, if not configured but

Optionally, the embodiment of the present application may further target the SBFD scenario. Optimization is performed so that TBS can be more adaptable to the total number of transmission resources and ensure transmission performance.

In a possible implementation manner, the number of REs in the first PRB of the first channel satisfies the following formula:

Wherein, _N′RE is the number of REs in the first PRB of the first channel, is the number of subcarriers in a PRB, is the number of symbols allocated to the first channel in a time slot, is the number of REs for DMRS on a PRB, Configured by high level.

in, Related technologies configured by high-level Different from the related art Used to determine the number of REs in a PRB for a second channel, the second channel is different from the first channel in the embodiment of the present application, and the frequency domain resources of all symbols in the second channel do not overlap with the first subband (such as the SBFD subband). In other words, taking PDSCH as an example, if all downlink symbols in the PDSCH do not overlap with the SBFD subband, or the network side does not configure the SBFD subband, then when determining the number of REs in a PRB of the PDSCH, the high-level configuration in the related technology can be used. If all or part of the downlink symbols of the PDSCH overlap with the SBFD subband, the optimized RE number in the embodiment of the present application can be used when determining the number of REs in a PRB of the PDSCH.

In a possible implementation, the network device instructs the terminal device to determine the number of REs in the first PRB of the first channel according to the above formula (6) in the scheduling signaling for scheduling the first channel. The scheduling signaling may be RRC signaling or DCI.

In a possible implementation, as long as the frequency domain resources of the first channel overlap with the first sub-band, the terminal device determines the number of REs in the first PRB of the first channel according to the above formula (6).

In another possible implementation, the terminal device may determine the number of REs in the first PRB of the first channel according to the above formula (6) only when certain conditions are met. For example, the condition may be: the ratio of M1 to L1 (M1/L1) is greater than or equal to the first threshold, where L1 is the number of symbols of the first channel in the first time slot, M1 is the number of symbols of the first channel overlapping with the first subband in the first time slot, M1 and L1 are both integers greater than or equal to 1, and M1 is less than or equal to L1. The embodiment of the present application does not limit this condition.

For example, the first ratio (M1/L1) can be compared with a set threshold. If the first ratio (M1/L1) is greater than the set threshold, the optimized ratio of the embodiment of the present application is used when determining TBS. Otherwise, you can use the related art or

In a possible implementation, the optimized embodiment of the present application The value of can be determined according to the relationship between the first ratio (M1/L1) and the set threshold value. Wherein, the meanings of M1 and L1 are the same as above.

Exemplarily, the value range of the first ratio (M1/L1) can be configured to The corresponding relationship between the values of , which can be configured by the network side to the terminal device, or pre-agreed. The terminal device can determine the value range of the first ratio by querying the corresponding relationship Table 2 shows an exemplary range of values of the first ratio (M1/L1) and The corresponding relationship between the values of .

Table 2

Optionally, the optimized embodiment of the present application A set of values can be used to configure a new set for SBFD time slots. For example, different time slot types can be configured differently. The timeslot type may include an SBFD timeslot, an uplink timeslot (UL only), a downlink timeslot (DL only), a flexible timeslot, etc.

Optionally, the SBFD timeslot and the uplink timeslot can correspond to the same The set of values can be A new value is added to the value set, which can also be a related art A collection of values.

Optionally, the SBFD timeslot and the downlink timeslot can correspond to the same The set of values of can be in the related art A new value is added to the value set, which can also be a related technology A collection of values.

S403: The terminal device determines the number of PRBs of the first channel used for transmitting the first channel in the first time slot according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband.

Optionally, the terminal device may adopt the following method 1, method 2 or method 3 to determine the number of PRBs used by the first channel to transmit the first channel in the first time slot.

method one:

The terminal device may subtract the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, to obtain the number of PRBs of the first channel used to transmit the first channel in the first time slot. The unavailable PRBs include PRBs in the first time slot of the first channel indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the first time slot indicated by the frequency domain resource information of the first subband.

As long as the frequency domain resources of the first channel on a symbol in the first time slot overlap with the first subband, the terminal device can determine the number of PRBs used by the first channel in the first time slot for transmitting the first channel through this implementation method.

It can be understood that if the number of repeated transmissions of the first channel K=1 or the first channel does not perform repeated transmission, the first time slot is a time slot occupied by one transmission of the first channel; if the first channel repeats transmission K times in K time slots, the first time slot is one of the K time slots.

Method 2:

When determining that the first condition is met, the terminal device may subtract the unusable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel.

Optionally, the first condition may be one of the following conditions:

Condition 1: The ratio of M1 to L1 (M1/L1) is greater than or equal to the first threshold. Where L1 is the number of symbols of the first channel in the first time slot, and M1 is the number of symbols corresponding to at least one symbol of the first subband in the first time slot, or M1 is the number of symbols corresponding to the first channel in the first subband. The number of symbols overlapping with the first sub-band in the time slot, M1 and L1 are both integers greater than or equal to 1, and M1 is less than or equal to L1.

Based on the above condition 1, if M1/L1 is greater than or equal to the first threshold, the terminal device subtracts the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel. Optionally, if M1/L1 is less than the first threshold, the terminal device may determine the number of PRBs of the first channel in the first time slot based on the number of PRBs indicated by the frequency domain resource information of the first channel.

It can be understood that the above condition 1 can also be expressed as: the ratio of M1 to L1 (M1/L1) is greater than the first threshold. Based on this condition, if M1/L1 is greater than the first threshold, the terminal device subtracts the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel. Optionally, if M1/L1 is less than or equal to the first threshold, the terminal device can determine the number of PRBs of the first channel in the first time slot by the number of PRBs indicated by the frequency domain resource information of the first channel.

Condition 2: M1 exceeds the set threshold Thr1. The meaning of M1 is the same as that defined in Condition 1.

Condition 3: L1 exceeds the set threshold Thr2. The meaning of L1 is the same as that in Condition 1.

Condition 4: M1 exceeds the set threshold Thr1, and L1 exceeds the set threshold Thr2. The meaning of M1 and the meaning of L1 are the same as those defined in Condition 1.

By adopting method 2, when the number of symbols in the first subband is large or the number of symbols in the first subband accounts for a high proportion, the unusable PRBs of the first channel in the first time slot can be subtracted from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel. Therefore, compared with method 1, method 2 can make the number of PRBs determined by the first channel in the first time slot for transmitting the first channel more accurate. In other words, the number of PRBs determined by method 2 is more consistent with the number of PRBs that can actually be used by the first channel in the first time slot to transmit the first channel.

Method 3:

For M1 symbols, the terminal device subtracts the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, and obtains the first PRB number, which is the number of PRBs used to transmit the first channel on at least one symbol in the first time slot of the first channel; for L1′ symbols, the terminal device determines the second PRB number according to the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel. Among them, M1 is the number of symbols of the first channel in the first time slot that overlap with the first subband, in other words, on the M1 symbols, the frequency domain resources of the first channel overlap with the first subband; L1 is the number of symbols of the first channel in the first time slot, L1′=L1-M1.

In S404, the terminal device determines the number of REs used to transmit the first channel on the M1 symbols based on the number of symbols of the M1 symbols and the number of first PRBs, determines the number of REs used to transmit the first channel on the L1′ symbols based on the number of symbols of the L1′ symbols and the number of second PRBs, and then adds the number of REs used to transmit the first channel on the M1 symbols to the number of REs used to transmit the first channel on the L1′ symbols to obtain the number of REs used to transmit the first channel on the first channel in the first time slot.

Wherein, N _RE,M1 is the number of REs used to transmit the first channel on the M1 symbols, is the number of REs of DMRS on the M1 symbols, Configured by high level or N _RE,L1′ is the number of REs used to transmit the first channel on the L1′ symbols, is the number of REs of DMRS on the L1′ symbols, Configured by high level or is the number of subcarriers in a PRB, n _PRB is the number of PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, and n _{over subband} is the number of PRBs in the first time slot indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the first time slot indicated by the frequency domain resource information of the first subband.

Optionally, when the above method 3 is adopted, the terminal device may not execute S402.

By adopting method three, different methods can be used to determine the number of PRBs and the number of REs for symbols in the first channel that overlap with the first subband and symbols that do not overlap with the first subband. Therefore, compared with method one or method two, method three can make the determined number of REs of the first channel used to transmit the first channel in the first time slot more accurate. In other words, the number of REs determined by method three is more consistent with the number of REs that can actually be used to transmit the first channel in the first time slot.

In one possible manner, the terminal device subtracts the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel according to the first indication information sent by the network device, and performs corresponding operations according to the indication of the first indication information, thereby improving the flexibility of the system.

Optionally, the first indication information is used to indicate whether the first channel indicated by the frequency domain resource information of the first channel is in a time slot. The unusable PRBs of the first channel in the time slot are subtracted from the PRBs of the first channel in the time slot. For example, the first indication information can have two possible values. When the value of the first indication information is equal to the first value (such as 1), it is used to instruct the terminal device to determine the number of PRBs of the first channel in the first time slot according to the method provided in the embodiment of the present application, that is, subtract the unusable PRBs of the first channel in the time slot from the PRBs of the first channel in a time slot indicated by the frequency domain resource information of the first channel. When the value of the first indication information is equal to the second value (such as 0), it is used to indicate that the terminal device can determine the number of PRBs according to the method provided by the relevant technology, such as determining the number of PRBs of the first channel in the first time slot according to the frequency domain resource information of the first channel.

Optionally, the first indication information is used to instruct the terminal device to determine the number of PRBs of the first channel in the first time slot according to the method provided in the embodiment of the present application. If the terminal device receives the first indication information, the number of PRBs of the first channel in the first time slot is determined according to the method provided in the embodiment of the present application, otherwise the terminal device can determine the number of PRBs according to the method provided by the relevant technology, such as determining the number of PRBs of the first channel in the first time slot according to the frequency domain resource information of the first channel.

Optionally, the first indication information may be carried in RRC signaling or DCI.

In a possible implementation, when the terminal device determines the number of PRBs of the first channel in the first time slot, the PRBs overlapping with the RB-symbol pattern may be subtracted. The RB-symbol pattern is a resource that cannot be used to transmit the first channel (such as PDSCH) configured by the network device for the terminal device in the related art. The RB-symbol pattern may also be called a rate matching pattern. Taking the first channel as PDSCH as an example, if the frequency domain position of the PDSCH scheduled by the network device overlaps with the RB indicated by the RB-symbol pattern, the network device does not send PDSCH on the RB indicated by the RB-symbol pattern. In the related art, these RBs are not subtracted when the terminal device determines the number of PRBs, while in an embodiment of the present application, if the frequency domain position of the PDSCH scheduled by the network device overlaps with the RB of the UL subband, the PDSCH is not sent on the overlapping RB, and these RBs are subtracted when calculating the number of PRBs.

In another possible implementation, when determining the number of PRBs of the first channel in the first time slot, the terminal device may subtract the RBs overlapping with the UL subband, but may not subtract the PRBs overlapping with the RB-symbol pattern.

S404: The terminal device determines the number of REs used by the first channel in the first time slot to transmit the first channel according to the number of PRBs used by the first channel in the first time slot to transmit the first channel.

In a possible implementation, the terminal device may determine the number of REs used by the first channel in the first time slot for transmitting the first channel according to the method provided by the relevant technology. For example, the number of REs in the first PRB of the first channel may be multiplied by the number of PRBs used by the first channel in the first time slot for transmitting the first channel to obtain the number of REs used by the first channel in the first time slot for transmitting the first channel; the number of REs used by the first channel in the first time slot for transmitting the first channel may also be determined by referring to formula (2), in which case N′ _RE in formula (2) is the number of REs in the first PRB determined in S402, and n _PRB is the number of PRBs determined in S403.

S405: The terminal device determines the TBS of the transport block carried by the first channel in the first time slot according to the number of REs used by the first channel in the first time slot to transmit the first channel.

In a possible implementation, the terminal device may determine the size of the transmission block of the first channel in the first time slot according to the method provided by the relevant technology. For example, the terminal device may calculate an intermediate value N _info according to formula (3) based on the number of REs determined in S404, and then perform quantization table lookup and other operations based on N _info to obtain the TBS of the transmission block of the first channel in a time slot. Furthermore, if the PDSCH is scheduled through DCI format 1_0 and the CRC is scrambled by P-RNTI or RA-RNTI or MsgB-RNTI, a proportional factor S may be introduced to calculate an intermediate value N _info according to formula (4), and then perform quantization table lookup and other operations based on N _info to obtain the TBS of the transmission block in a time slot of the first channel.

Optionally, the embodiment of the present application may further optimize the scaling factor S for the SBFD scenario, so that the TBS can be more adapted to the total number of transmission resources and ensure transmission performance.

In a possible implementation, the terminal device can determine the first intermediate value according to the number of REs used by the first channel in the first time slot to transmit the first channel, the first proportional factor, the coding rate of the first channel, the modulation order of the first channel, and the number of layers, and perform a table lookup according to the first intermediate value to obtain the TBS of the transmission block carried on the first channel in the first time slot. Among them, the first proportional factor in the embodiment of the present application is different from the second proportional factor in the related art, and the second proportional factor in the related art is used to determine the TBS for the second channel, and the second channel is different from the first channel in the embodiment of the present application, and the frequency domain resources of all symbols in the second channel do not overlap with the first subband (such as the SBFD subband). In other words, taking PDSCH as an example, if all downlink time slots in PDSCH do not overlap with the SBFD subband, or the network side does not configure the SBFD subband, then when determining the TBS of the PDSCH, the proportional factor indicated by the network device in the related art can be used; if all downlink time slots or part of the downlink time slots in PDSCH overlap with the SBFD subband, then when determining the TBS of the PDSCH, the optimized proportional factor indicated by the network device in the embodiment of the present application can be used.

Optionally, as long as the frequency domain resources of the first channel in the first time slot overlap with the first sub-band, the terminal device can use the optimized first proportional factor provided in the embodiment of the present application to determine the TBS.

Optionally, the terminal device may use the optimized proportional factor provided in the embodiment of the present application to determine the TBS only when certain conditions are met. For example, the condition may be: the ratio of M1 to L1 (M1/L1) is greater than or equal to the first threshold, where L1 is the number of symbols of the first channel in the first time slot, M1 is the number of symbols of the first channel overlapping with the first subband in the first time slot, M1 and L1 are both integers greater than or equal to 1, and M1 is less than or equal to L1. The embodiment of the present application does not limit this condition.

Optionally, the value of the optimized proportionality factor in the embodiment of the present application can be determined according to the relationship between the first ratio (M1/L1) and the set threshold value, wherein M1 and L1 have the same meaning as above.

Exemplarily, a correspondence between the value interval of the first ratio (M1/L1) and the value of the proportional factor can be configured. The correspondence can be configured by the network side to the terminal device or pre-agreed, and the terminal device can determine the value of the proportional factor by querying the correspondence according to the value interval of the first ratio. Alternatively, the correspondence is stored on the network device side, and the network device can determine the value of the proportional factor by querying the correspondence according to the value interval of the first ratio, and then send the value of the proportional factor to the terminal device.

Optionally, the first proportionality factor optimized in the embodiment of the present application may be carried in RRC signaling or DCI.

Optionally, a new value may be added to the set of scaling factor values provided by the related art, such as S=0, to determine the TBS for a PDSCH or PUSCH that does not overlap with the SBFD subband.

In the above process of the present application, for the sub-band full-duplex scenario, the terminal device considers the overlap between the first channel and the first sub-band when determining the TBS. When determining the number of PRBs of the first channel in the first time slot, it is based not only on the frequency domain resource information of the first channel, but also on the frequency domain resource information of the first sub-band. Therefore, the number of PRBs of the first channel used to transmit the first channel in the first time slot can be determined, so that the TBS determined based on this is more suitable for the transmission resources of the first channel, thereby improving the accuracy of the TBS and ensuring the transmission performance.

In the embodiment of the present application, the transmission block may be repeatedly transmitted in K time slots of the first channel, where K is referred to as the number of repetitions. This repeated transmission may also be referred to as time slot-level repeated transmission, and each transmission may correspond to L OFDM symbols (L is the time domain length indicated by the time domain resource of the first channel), and one transmission block is transmitted in each transmission, that is, one transmission block is repeatedly transmitted K times, and among the K transmissions, the resources used by some transmissions may overlap with the SBFD subband, and the resources used by some transmissions may not overlap with the SBFD subband.

5 exemplarily shows a schematic diagram of repeated transmission with a repetition number K=4, where the transmission block TB1 is transmitted in the first channel in time slot 1, time slot 2, time slot 3 and time slot 4. Optionally, in each time slot, the time domain starting position S and length L of the transmission block TB1 are the same.

For the above-mentioned repeated transmission scenario, in a possible implementation, the size of the transmission block in the remaining time slots of the K time slots of the first channel except the first time slot is the same as the size of the transmission block in the first time slot. In other words, the TBS of the transmission block carried on the first channel in each time slot of the K time slots except the first time slot is the same as the TBS of the transmission block carried on the first channel in the first time slot. Among them, the first channel overlaps with the first sub-band in the first time slot, and the method for determining the TBS of the transmission block in the first time slot can refer to the aforementioned embodiment. In other words, if the first time slot of the first channel in the K time slots overlaps with the SBFD sub-band, the TBS of the transmission block in each time slot of the K time slots of the first channel is the same as its TBS in the first time slot of the first channel.

Taking the first channel as PDSCH as an example, if the PDSCH on time slot 1 overlaps with the UL subband, and time slots 2 to 4 have no overlap with the UL subband, then in an embodiment of the present application, it can be stipulated that the TBS of the transport block in time slots 2 to 4 is determined according to the TBS of the transport block in time slot 1.

Optionally, for the above-mentioned repeated transmission scenario, if the second time slot of the first channel in the K time slots does not overlap with the first subband, the TBS of the transmission block in each time slot of the K time slots of the first channel is the same as its TBS in the second time slot of the first channel.

Optionally, the TBS of the transmission block in each time slot among K time slots is determined according to the TBS in the time slot that overlaps with the first sub-band among K time slots. This may be specified by the protocol or with or without network side configuration, and the embodiments of the present application do not impose any restrictions on this.

For the above-mentioned repeated transmission scenario, in another possible implementation method, the TBS of the transmission block in each of the K time slots can be determined separately, and then the maximum or minimum value of the TBS of the transmission block in the K time slots is selected, and the selected maximum or minimum value of the TBS is determined as the TBS of the transmission block in each of the K time slots. After the terminal device determines the TBS of the transmission block carried on the first channel in the first time slot according to the aforementioned method, the terminal device can determine the TBS of the transmission block carried on the first channel in each of the remaining time slots separately, and then select the maximum or minimum value of the TBS of the transmission block carried on the first channel in the K time slots, and determine the maximum or minimum value as the TBS of the transmission block carried on the first channel in each of the K time slots.

For the first time slot among the K time slots, if the time slot overlaps with the first sub-band, the TBS of the transport block in the time slot can be determined according to the method shown in Figure 4. For other time slots for repeated transmission among the K time slots, the TBS of the transport block in these time slots for repeated transmission can be determined according to the method described below.

In a possible implementation, taking the time slot for repeated transmission as the second time slot as an example, the terminal device can determine the number of PRBs used by the first channel in the second time slot for transmitting the first channel according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband. According to the number of PRBs used by the first channel in the second time slot to transmit the first channel, determine the number of REs used by the first channel in the second time slot to transmit the first channel; according to the number of REs used by the first channel in the second time slot to transmit the first channel, determine the TBS of the transmission block carried on the first channel in the second time slot.

Optionally, determining the number of PRBs used by the first channel in the second time slot for transmitting the first channel according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband can be implemented in the following manner: subtracting the unavailable PRBs of the first channel in the second time slot from the PRBs of the first channel in the second time slot indicated by the frequency domain resource information of the first channel. The unavailable PRBs include PRBs in the second time slot indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the second time slot indicated by the frequency domain resource information of the first subband.

Optionally, in the above process, the operation of subtracting the unavailable PRB of the first channel in the second time slot from the PRB of the first channel in the second time slot indicated by the frequency domain resource information of the first channel can also be performed only when the second condition is met. Optionally, the second condition includes: the ratio of M2 to L2 is greater than or equal to the second threshold, L2 is the number of symbols of the first channel in the second time slot, M2 is the number of symbols of the first channel overlapping with the first subband in the second time slot, M2 and L2 are both integers greater than or equal to 1, and M2 is less than or equal to L2. Optionally, if the second condition is not met, the TBS can be determined according to the method provided by the relevant technology.

Optionally, the operation of subtracting the unavailable PRB of the first channel in the second time slot from the PRB of the first channel in the second time slot indicated by the frequency domain resource information of the first channel may also be performed only when the third condition is met. Optionally, the third condition includes: the ratio of K' to K is greater than or equal to a third threshold value, and in each of the K' time slots, the frequency domain resources on at least one symbol overlap with the first sub-band. In other words, K' is an integer greater than or equal to 1, and K' is less than or equal to K. That is, in the K time slots, the first channel overlaps with the first sub-band in each of the K' time slots. Optionally, if the third condition is not met, the TBS can be determined according to the method provided by the relevant technology.

In some scenarios, when the number of repeated transmissions is K, a data block can be cut into K parts, and only one part of it is transmitted each time. FIG6 exemplarily shows a schematic diagram of repeated transmission with the number of repeated transmissions K=4, where the transmission block TB1 is divided into four blocks, the first block is transmitted in time slot 1, the second block is transmitted in time slot 2, and so on. Optionally, in each time slot, the time domain starting position S and length L of the data transmission are the same.

In this case, in a possible implementation, for each time slot, the number of PRBs used by the first channel in the time slot for transmitting the first channel may be determined according to the aforementioned method. When determining the number of REs of the first channel in the first time slot according to the number of PRBs used by the first channel in a time slot for transmitting the first channel, it may be calculated according to the following formula:
N _RE =K min(156,N′ _RE ) n _PRB ………………(9)

Wherein, N _RE is the number of REs of the first channel in the first time slot, K is the number of repetitions, N′ _RE is the number of REs in a PRB allocated to the first channel, and n _PRB is the number of PRBs of the first channel in the first time slot.

For other steps, reference may be made to the implementation methods in the related art, or to the implementation methods in the embodiments of the present application.

In other scenarios of repeated transmission, the number of repeated transmissions is K, corresponding to K time units, such as K time slots, and the transmission block TB1 is divided into K blocks, which are transmitted on K repeated transmission resources. Taking K time slots as an example, in K1 time slots among the K time slots, the first channel overlaps with the first sub-band, and in K2 time slots among the K time slots, the first channel does not overlap with the first sub-band. Among them, K1+K2=K, K is an integer greater than 1, and K1 and K2 are both integers greater than 1 or equal to 1.

In this case, in one possible implementation, for each of the K1 time slots, the number of PRBs and the number of REs of the first channel used to transmit the first channel in the time slot can be determined according to the method provided in the embodiment of the present application. For the K2 time slots, the number of PRBs and the number of REs of the first channel in the time slot can be determined according to the method provided in the related art, and then the number of REs of the first channel in all K time slots is added, and the TBS of the transmission block is determined based on this.

In another possible implementation method of the above scenario, if in A time slots of K1 time slots, the first channel overlaps with the first subband, and the ratio M/L is greater than or equal to the set threshold, where L is the number of symbols of the first channel in the time slot, and M is the number of symbols overlapping with the first subband in the time slot, then for each of the A time slots, the method provided in the embodiment of the present application can be used to determine the number of PRBs and the number of REs of the first channel used to transmit the first channel in the time slot, and for other time slots except A time slots in the K time slots, the method provided by the relevant technology can be used to determine the number of PRBs and the number of REs of the first channel in the time slot, and then the number of REs of the first channel in all K time slots is added, and the TBS of the transmission block is determined based on this.

In another possible implementation of the above scenario, if the ratio K1/K is greater than or equal to the set threshold, then for each of the K time slots, the method provided in the previous embodiment of the present application can be used to determine the number of PRBs and REs of the first channel used to transmit the first channel in the time slot, and then the number of PRBs of the first channel in all K time slots is added, and the TBS of the transmission block is determined based on this. Otherwise, for each of the K time slots, the method provided by the relevant technology is used to determine the number of PRBs and REs of the first channel in the time slot. The number of REs is then summed for the first channel in all K time slots, and the TBS of the transport block is determined based on this.

In some embodiments of the present application, in the process of determining the TBS of the data block transmitted by the first channel, when determining the number of REs in the first PRB of the first channel, the optimized method of the embodiment of the present application can be used. The remaining operations can be implemented according to relevant technologies. The specific implementation method can refer to the above embodiment and will not be repeated here.

In other embodiments of the present application, in the process of determining the TBS of the data block transmitted by the first channel, when determining the first intermediate value N _info , the scale factor optimized by the embodiment of the present application can be used, and the remaining operations can be implemented according to the relevant technology. The specific implementation method can refer to the above embodiment and will not be repeated here.

FIG7 shows a flow chart of the interaction between a terminal device and a network device in an embodiment of the present application. As shown in the figure, the process may include the following steps:

Step 701: The network device sends time-frequency resource information of a first channel and time-frequency resource information of a first subband to a terminal device.

Step 702: The terminal device determines the TBS of the transport block carried by the first channel in the first time slot according to the time-frequency resource information of the first channel and the time-frequency resource information of the first subband. For specific implementation, please refer to FIG. 4 and the relevant contents of the embodiment of the present application, which will not be repeated here.

Step 703: The terminal device transmits data according to the scheduling signaling of the network device.

In some other embodiments of the present application, the TBS of the transport block in the first channel can also be determined on the network device side according to the same principle. FIG8 shows a TBS determination method implemented on the network device side provided by an embodiment of the present application.

As shown in FIG8 , the process may include the following steps:

S801: The network device allocates time-frequency resource information of a first channel and time-frequency resource information of a first sub-band to the terminal device. The first sub-band on at least one symbol in the time domain resources of the first channel is not used to transmit the first channel.

For relevant descriptions of the first channel and the first sub-band, reference may be made to the aforementioned embodiments.

For relevant descriptions of the time-frequency resource information of the first channel and the time-frequency resource information of the first sub-band, reference may be made to the aforementioned embodiments.

S802: The network device determines the number of REs in the first PRB of the first channel according to the time domain resource information of the first channel. This step is optional.

S803: The network device determines the number of PRBs of the first channel used for transmitting the first channel in the first time slot according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband.

S804: The network device determines the number of REs used by the first channel in the first time slot to transmit the first channel according to the number of PRBs used by the first channel in the first time slot to transmit the first channel.

S805: The network device determines the TBS of the transport block carried on the first channel in the first time slot according to the number of REs of the first channel used for transmitting the first channel in the first time slot.

The specific implementation method of S802 to S805 in the above process is the same as the relevant operation principle performed by the terminal device in the above embodiment, and will not be repeated here.

In the above process of the present application, for the sub-band full-duplex scenario, the network device considers the overlap between the first channel and the first sub-band when determining the TBS. When determining the number of PRBs of the first channel in the first time slot, it is based not only on the frequency domain resource information of the first channel, but also on the frequency domain resource information of the first sub-band. Therefore, the number of PRBs of the first channel used to transmit the first channel in the first time slot can be determined, so that the TBS determined based on this is more suitable for the transmission resources of the first channel, thereby improving the accuracy of the TBS and ensuring the transmission performance.

Based on the same technical concept, the embodiment of the present application further provides a communication device, which can implement the functions implemented by the terminal device or network device in the above-mentioned embodiment. As shown in FIG9 , the communication device 900 may include a processing unit 901 and a transceiver unit 902 .

The processing unit 901 is used to: determine the number of physical resource blocks (PRBs) used by the first channel to transmit the first channel in the first time slot according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the first subband on at least one symbol in the time domain resources of the first channel is not used to transmit the first channel, the first time slot is the time slot where the time domain resources of the first channel are located, or the first time slot is one of at least two time slots where the time domain resources of the first channel are located; determine the number of resource units (REs) used by the first channel to transmit the first channel in the first time slot according to the number of PRBs used by the first channel to transmit the first channel in the first time slot; determine the TBS of the transmission block carried on the first channel in the first time slot according to the number of REs used by the first channel to transmit the first channel in the first time slot.

It can be understood that the above-mentioned communication device provided in the embodiment of the present application can implement all the method steps implemented by the terminal device in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

For ease of understanding, FIG. 10 only shows the structure required for the communication device 1000 to execute the method shown in the present application, and the present application does not limit the communication device 1000 to perform the method shown in the present application. The communication device 1000 may be used to execute the steps executed by the related devices in the above method embodiment, for example, the related devices may be terminal devices or network devices.

The communication device 1000 may include a transceiver 1001, a memory 1003, and a processor 1002, and the transceiver 1001, the memory 1003, and the processor 1002 may be connected via a bus 1004. The transceiver 1001 may be used for the communication device to communicate, such as for sending or receiving signals. The memory 1003 is coupled to the processor 1002 and may be used to store programs and data necessary for the communication device 1000 to implement various functions. The above memory 1003 and the processor 1002 may be integrated or independent of each other.

Exemplarily, the transceiver 1001 may be a communication port, such as a communication port (or interface) used for communication between network elements. The transceiver 1001 may also be referred to as a transceiver unit or a communication unit. The processor 1002 may be implemented by a processing chip or a processing circuit. The transceiver 1001 may receive or send information wirelessly or by wire.

In addition, according to the needs of actual use, the communication device provided in the embodiment of the present application may include a processor, and the processor calls an external transceiver and/or memory to implement the above functions or steps or operations. The communication device may also include a memory, and the processor calls and executes the program stored in the memory to implement the above functions or steps or operations. Alternatively, the communication device may also include a processor and a transceiver (or a communication interface), and the processor calls and executes the program stored in the external memory to implement the above functions or steps or operations. Alternatively, the communication device may also include a processor, a memory, and a transceiver.

Based on the same concept as the above-mentioned method embodiment, a computer-readable storage medium is also provided in the embodiment of the present application, on which program instructions (or computer programs, instructions) are stored. When the program instructions are executed by the processor, the computer executes the operations performed by the terminal device or network device in the above-mentioned method embodiment or any possible implementation method of the method embodiment.

Based on the same concept as the above-mentioned method embodiment, the present application also provides a computer program product, including program instructions. When the computer program product is called and executed by a computer, it can enable the computer to implement the operations performed by a terminal device or a network device in the above-mentioned method embodiment and any possible implementation method of the method embodiment.

Based on the same concept as the above method embodiment, the present application also provides a chip or a chip system, which is coupled with a transceiver and is used to implement the operations performed by a terminal device or a network device in the above method embodiment or any possible implementation of the method embodiment. The chip system may include the chip, as well as components such as a memory and a communication interface.

Based on the same concept as the above method embodiment, the present application embodiment further provides a communication system. Optionally, the communication system includes a terminal device and a network device, the terminal device can perform the operations of the terminal device in the above method embodiment, and the network device can perform the operations of the network device in the above method embodiment.

Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

The present application is described with reference to the flowchart and/or block diagram of the method, device (system), and computer program product according to the present application. It should be understood that each process and/or box in the flowchart and/or block diagram, as well as the combination of the process and/or box in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one process or multiple processes in the flowchart and/or one box or multiple boxes in the block diagram.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the protection scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

A method for determining a transport block size TBS, comprising:

Determine, according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the number of physical resource blocks (PRBs) of the first channel used to transmit the first channel in the first time slot, the first subband on at least one symbol in the time domain resources of the first channel is not used to transmit the first channel, and the first time slot is the time slot where the time domain resources of the first channel are located, or the first time slot is one of at least two time slots where the time domain resources of the first channel are located;

Determine, according to the number of PRBs used by the first channel in the first time slot for transmitting the first channel, the number of resource units RE used by the first channel in the first time slot for transmitting the first channel;

The TBS of the transport block carried on the first channel in the first time slot is determined according to the number of REs of the first channel used for transmitting the first channel in the first time slot.
The method according to claim 1, characterized in that the determining, according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the number of PRBs used by the first channel in the first time slot for transmitting the first channel comprises:

Subtract the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel to obtain the number of PRBs of the first channel used to transmit the first channel in the first time slot, the unavailable PRBs including the PRBs in the first time slot indicated by the frequency domain resource information of the first channel overlapping with the PRBs in the first time slot indicated by the frequency domain resource information of the first subband.
The method according to claim 2, characterized in that the subtracting the unavailable PRB of the first channel in the first time slot from the PRB of the first channel in the first time slot indicated by the frequency domain resource information of the first channel comprises:

If the first condition is met, subtracting the unavailable PRB of the first channel in the first time slot from the PRB of the first channel in the first time slot indicated by the frequency domain resource information of the first channel;

The first condition includes: the ratio of M1 to L1 is greater than or equal to a first threshold, L1 is the number of symbols of the first channel in the first time slot, M1 is the number of symbols of the first channel overlapping with the first subband in the first time slot, M1 and L1 are both integers greater than or equal to 1, and M1 is less than or equal to L1.
The method according to any one of claims 1 to 3, characterized in that:

The method further comprises:

Determine the number of REs in a first PRB of the first channel according to the time domain resource information of the first channel;

The determining, according to the number of PRBs used by the first channel in the first time slot to transmit the first channel, the number of REs used by the first channel in the first time slot to transmit the first channel, includes:

The number of REs used by the first channel in the first time slot to transmit the first channel is determined according to the number of REs in the first PRB of the first channel and the number of PRBs used by the first channel in the first time slot to transmit the first channel.
The method according to claim 4, characterized in that the number of REs in the first PRB of the first channel satisfies the following formula:

Wherein, N′RE is the number of REs in the first PRB of the first channel, is the number of subcarriers in a PRB, is the number of symbols allocated to the first channel in a time slot, is the number of REs for DMRS on a PRB, Configured by high-level; among them, With high-level configuration Different, the Used to determine the number of REs in a PRB for a second channel, where frequency domain resources of all symbols in the second channel have no overlap with the first subband.
The method according to claim 5, characterized in that The value of is determined according to the relationship between the first ratio and the set threshold, wherein the first ratio is M1/L1, the M1 is the number of symbols of the first channel overlapping with the first subband in the first time slot, and the N1 is the number of symbols of the first channel in the first time slot.
The method according to claim 1, characterized in that the determining, according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the number of PRBs used by the first channel in the first time slot for transmitting the first channel comprises:

Subtract the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, to obtain a first number of PRBs, where the first number of PRBs is the number of PRBs used by the first channel for transmitting the first channel on at least one symbol in the first time slot;

The determining, according to the number of PRBs used by the first channel in the first time slot to transmit the first channel, the number of REs used by the first channel in the first time slot to transmit the first channel, includes:

Determine, according to the number of symbols of M1 symbols and the number of the first PRBs, the number of REs used to transmit the first channel on the M1 symbols, the M1 symbols being symbols corresponding to the at least one symbol;

Determine the number of REs used to transmit the first channel on the L1′ symbols according to the number of symbols of the L1′ symbols and the number of PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, where L1′=L1-M1, and L1 is the number of symbols of the first channel in the first time slot;

The number of REs used for transmitting the first channel on the M1 symbols is added to the number of REs used for transmitting the first channel on the L1′ symbols to obtain the number of REs used for transmitting the first channel on the first time slot.
The method according to claim 7, characterized in that:

The number of REs used to transmit the first channel on the M1 symbols satisfies the following formula:

The number of REs used to transmit the first channel on the L1′ symbols satisfies the following formula:

Wherein, N RE,M1 is the number of REs used to transmit the first channel on the M1 symbols, is the number of REs of the demodulation reference signal DMRS on the M1 symbols, Configured by high level or N RE,L1′ is the number of REs used to transmit the first channel on the L1′ symbols, is the number of REs of DMRS on the L1′ symbols, Configured by high level or is the number of subcarriers in a PRB, n PRB is the number of PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, and n over subband is the number of PRBs in the first time slot indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the first time slot indicated by the frequency domain resource information of the first subband.
The method according to any one of claims 2-3, 7-8, characterized in that subtracting the unusable PRB of the first channel in the first time slot from the PRB of the first channel in the first time slot indicated by the frequency domain resource information of the first channel comprises:

According to the first indication information sent by the network device, the unavailable PRBs of the first channel in the first time slot are subtracted from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel.
The method as described in any one of claims 1-9 is characterized in that if the transmission block is repeatedly transmitted in K time slots, the K time slots are K time slots in the time slots where the time domain resources of the first channel are located, the K time slots include the first time slot, and K is an integer greater than 1, then the TBS of the transmission block carried on the first channel in each time slot of the K time slots except the first time slot is the same as the TBS of the transmission block carried on the first channel in the first time slot.
The method according to any one of claims 1 to 9, characterized in that if the transport block is repeatedly transmitted in K time slots, the K time slots are K time slots in the time slots where the time domain resources of the first channel are located, the K time slots include the first time slot, and K is an integer greater than 1, the method further includes:

respectively determining a TBS of the transport block carried on the first channel in each time slot of the K time slots except the first time slot;

The maximum value or the minimum value of the TBS of the transport block carried on the first channel in the K time slots is selected, and the maximum value or the minimum value is determined as the TBS of the transport block carried on the first channel in each time slot in the K time slots.
The method according to claim 11, characterized in that the K time slots include a second time slot, the second time slot is different from the first time slot, and the determining the TBS of the transport block carried on the first channel in each time slot of the K time slots except the first time slot comprises:

Determine, according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the number of PRBs used by the first channel in the second time slot for transmitting the first channel;

Determine, according to the number of PRBs used by the first channel in the second time slot for transmitting the first channel, the number of REs used by the first channel in the second time slot for transmitting the first channel;

The TBS of the transport block carried on the first channel in the second time slot is determined according to the number of REs of the first channel used for transmitting the first channel in the second time slot.
The method according to claim 12, characterized in that the determining, according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the number of PRBs used by the first channel in the second time slot for transmitting the first channel comprises:

The number of PRBs of the first channel used to transmit the first channel in the second time slot is obtained by subtracting the unavailable PRBs of the first channel in the second time slot from the PRBs of the first channel in the second time slot indicated by the frequency domain resource information of the first channel, wherein the unavailable PRBs include the PRBs in the second time slot indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the second time slot indicated by the frequency domain resource information of the first subband.
The method according to claim 13, characterized in that the subtracting the unavailable PRB of the first channel in the second time slot from the PRB of the first channel in the second time slot indicated by the frequency domain resource information of the first channel comprises:

If the second condition is met, subtracting the unavailable PRBs of the first channel in the second time slot from the PRBs of the first channel in the second time slot indicated by the frequency domain resource information of the first channel;

The second condition includes: the ratio of M2 to L2 is greater than or equal to a second threshold, L2 is the number of symbols in the second time slot of the first channel, M2 is the number of symbols of the first channel overlapping with the first subband in the second time slot, M2 and L2 are both integers greater than or equal to 1, and M2 is less than or equal to L2.
The method according to claim 13, characterized in that the subtracting the unavailable PRB of the first channel in the second time slot from the PRB of the first channel in the second time slot indicated by the frequency domain resource information of the first channel comprises:

If the third condition is met, subtracting the unavailable PRBs of the first channel in the second time slot from the PRBs of the first channel in the second time slot indicated by the frequency domain resource information of the first channel;

The third condition includes: the ratio of K’ to the K is greater than or equal to a third threshold, the first channel overlaps with the first sub-band in each time slot of the K’ time slots, the K’ is an integer greater than or equal to 1, and the K’ is less than or equal to the K.
The method according to any one of claims 1 to 15, characterized in that determining the TBS of the transport block carried on the first channel in the first time slot according to the number of REs used by the first channel in the first time slot to transmit the first channel comprises:

Determine a first intermediate value according to the number of REs used by the first channel in the first time slot for transmitting the first channel, a first proportional factor, a coding rate of the first channel, a modulation order of the first channel, and a number of layers, and perform a table lookup according to the first intermediate value to obtain a TBS of a transport block carried on the first channel in the first time slot;

The first scaling factor is different from the second scaling factor, the second scaling factor is used to determine the TBS for a second channel, and the frequency domain resources of all symbols in the second channel have no overlap with the first subband.
The method as claimed in claim 16 is characterized in that the first proportional factor is determined according to the relationship between a first ratio and a set threshold, the first ratio is M1/L1, the M1 is the number of symbols of the first channel overlapping with the first subband in the first time slot, and the L1 is the number of symbols of the first channel in the first time slot.
The method according to any one of claims 1 to 17, characterized in that before determining the number of physical resource blocks (PRBs) of the first channel used to transmit the first channel in the first time slot according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the method further comprises:

Acquire time-frequency resource information of the first channel and time-frequency resource information of the first subband sent by a network device.
The method according to any one of claims 1 to 17, characterized in that before determining the number of physical resource blocks (PRBs) of the first channel used to transmit the first channel in the first time slot according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the method further comprises:

Allocate time-frequency resource information of the first channel and time-frequency resource information of the first subband to the terminal device.
The method according to any one of claims 1 to 19, characterized in that the first channel is a physical downlink shared channel PDSCH, or the first channel is a physical uplink shared channel PUSCH.
A communication device, characterized in that it comprises: a processing unit and a transceiver unit; the processing unit is used to:

Determine, according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the number of physical resource blocks (PRBs) of the first channel used to transmit the first channel in the first time slot, the first subband on at least one symbol in the time domain resources of the first channel is not used to transmit the first channel, and the first time slot is the time slot where the time domain resources of the first channel are located, or the first time slot is one of at least two time slots where the time domain resources of the first channel are located;

Determine, according to the number of PRBs used by the first channel in the first time slot for transmitting the first channel, the number of resource units RE used by the first channel in the first time slot for transmitting the first channel;

The TBS of the transport block carried on the first channel in the first time slot is determined according to the number of REs of the first channel used for transmitting the first channel in the first time slot.
The communication device according to claim 21, characterized in that the processing unit is specifically configured to:

The number of PRBs of the first channel used to transmit the first channel in the first time slot is obtained by subtracting the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, wherein the unavailable PRBs include the PRBs in the first time slot indicated by the frequency domain resource information of the first channel that overlap with the PRBs in the first time slot indicated by the frequency domain resource information of the first subband.
The communication device according to claim 22, characterized in that the processing unit is specifically used to:

If the first condition is met, subtracting the unavailable PRB of the first channel in the first time slot from the PRB of the first channel in the first time slot indicated by the frequency domain resource information of the first channel;

The first condition includes: the ratio of M1 to L1 is greater than or equal to a first threshold, L1 is the number of symbols of the first channel in the first time slot, M1 is the number of symbols of the first channel overlapping with the first subband in the first time slot, M1 and L1 are both integers greater than or equal to 1, and M1 is less than or equal to L1.
The communication device according to claim 21, characterized in that the processing unit is specifically configured to:

Subtract the unavailable PRBs of the first channel in the first time slot from the PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, to obtain a first number of PRBs, where the first number of PRBs is the number of PRBs used by the first channel for transmitting the first channel on at least one symbol in the first time slot;

Determine, according to the number of symbols of M1 symbols and the number of the first PRBs, the number of REs used to transmit the first channel on the M1 symbols, the M1 symbols being symbols corresponding to the at least one symbol;

Determine the number of REs used to transmit the first channel on the L1′ symbols according to the number of symbols of the L1′ symbols and the number of PRBs of the first channel in the first time slot indicated by the frequency domain resource information of the first channel, where L1′=L1-M1, and L1 is the number of symbols of the first channel in the first time slot;

The number of REs used for transmitting the first channel on the M1 symbols is added to the number of REs used for transmitting the first channel on the L1′ symbols to obtain the number of REs used for transmitting the first channel on the first time slot.
The communication device according to any one of claims 21 to 24, characterized in that the processing unit is further used to:

Before determining the number of physical resource blocks (PRBs) of the first channel used to transmit the first channel in the first time slot according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, the time-frequency resource information of the first channel and the time-frequency resource information of the first subband sent by the network device are obtained through the transceiver unit.
The communication device according to any one of claims 21 to 24, characterized in that the processing unit is further used to:

Before determining the number of physical resource blocks (PRBs) of the first channel used to transmit the first channel in the first time slot according to the frequency domain resource information of the first channel and the frequency domain resource information of the first subband, allocating the time-frequency resource information of the first channel and the time-frequency resource information of the first subband to the terminal device; and

The time-frequency resource information of the first channel and the time-frequency resource information of the first sub-band are sent to the terminal device through the transceiver unit.
The communication device according to any one of claims 21 to 26, characterized in that the first channel is a physical downlink shared channel PDSCH, or the first channel is a physical uplink shared channel PUSCH.
A communication device, characterized in that it comprises: one or more processors; wherein, when instructions of one or more computer programs are executed by the one or more processors, the communication device executes the method according to any one of claims 1-20.
A computer-readable storage medium, characterized in that the computer-readable storage medium includes a computer program, and when the computer program is run on a computing device, the computing device executes the method according to any one of claims 1 to 20.
A chip, characterized in that the chip is coupled to a memory and is used to read and execute program instructions stored in the memory to implement the method according to any one of claims 1 to 20.