CN110830161B

CN110830161B - Method and device for determining size of transmission block

Info

Publication number: CN110830161B
Application number: CN201910028872.1A
Authority: CN
Inventors: 胡丹; 李�远; 官磊; 李胜钰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-08-10
Filing date: 2019-01-11
Publication date: 2021-01-12
Anticipated expiration: 2039-01-11
Also published as: CN110830161A

Abstract

The embodiment of the application discloses a method and a device for determining the size of a transmission block, relates to the field of communication, and solves the problem of how to determine TBS based on non-time slot repetition. The specific scheme is as follows: and the sending equipment determines the TBS according to the RE number and the modulation coding mode included in the M first time units, and sends the data carried on the symbol corresponding to the first time unit S times. The receiving device receives S times of data carried on symbols corresponding to the first time units, determines a TBS according to the number of REs included in the M first time units and a modulation coding scheme, and decodes the data on the symbols corresponding to the first time units according to the TBS. Wherein, M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, K represents the number of times of pre-configuring repeated sending of data carried on the symbol corresponding to the first time unit, S is an integer, S is greater than or equal to 1 and less than or equal to K. The embodiment of the application is used for determining the size of the transmission block.

Description

Method and device for determining size of transmission block

The present application claims priority of chinese patent application having application number 201810911082.3, entitled "a method and apparatus for determining transport block size" filed by chinese patent office on 10/08/2018, the entire contents of which are incorporated herein by reference.

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for determining a size of a transport block.

Background

In order to cope with explosive mobile data traffic increase, massive mobile communication device connection, and various new services and application scenarios which are continuously emerging, the fifth generation (5G) mobile communication system is in operation. For applications of wireless control in industrial manufacturing or production processes, motion control of unmanned automobiles and unmanned airplanes, and haptic interaction such as remote repair and remote surgery, the International Telecommunications Union (ITU) defines Ultra Reliable and Low Latency Communications (URLLC). The URLLC service is mainly characterized by the requirement of ultra-high reliability, low delay, less transmission data volume and burstiness.

In the process of transmitting data between a terminal device and a network device, a Transport Block Size (TBS) needs to be determined. The transport block size is the amount of data (number of bits) carried on the time-frequency resource. In the prior art, the TBS in one slot may be determined based on slot-based repeated transmission of data. However, for the URLLC scenario with a high delay requirement, a non-slot-based (non-slot-based) repeat transmission of data may be adopted to satisfy the characteristic of low delay. Therefore, how to determine the TBS based on non-slot repetition is an urgent problem to be solved.

Disclosure of Invention

Embodiments of the present application provide a method and an apparatus for determining a transport block size, which solve the problem of how to determine a non-timeslot repeat-based TBS.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, an embodiment of the present application provides a method for determining a transport block size, where the method is applicable to a terminal device, or the method is applicable to an apparatus for determining a transport block size that may support the terminal device to implement the method, for example, the apparatus for determining a transport block size includes a chip system, or the method is applicable to a network device, or the method is applicable to an apparatus for determining a transport block size that may support the network device to implement the method, for example, the apparatus for determining a transport block size includes a chip system, and the method includes: after receiving the data carried on the symbol corresponding to the first time unit S times, determining the TBS according to the number of Resource Elements (REs) included in the M first time units and the modulation and coding scheme, and decoding the data on the symbol corresponding to the first time unit according to the TBS. Wherein, S is an integer, S is greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K represents the number of times of pre-configuring repeated sending of data carried on a symbol corresponding to the first time unit; m is an integer greater than or equal to 1 and less than or equal to K.

In the method for determining a transport block size provided in the embodiment of the present application, a TBS is calculated based on a whole or a part of non-slot repetition, data corresponding to the TBS is transmitted once in a first time unit, and the data is repeatedly transmitted S times. Thus, the TBS can be calculated using symbols occupied by all or a portion of transport blocks in a preset number of repetitions based on non-slot repetition without exceeding an upper limit on the number of symbols employed to calculate the TBS. Meanwhile, the flexibility of a repeated transmission starting point can be ensured while the transmission reliability is ensured.

In a second aspect, the present application provides a method for determining a transport block size, where the method is applicable to a terminal device, or the method is applicable to an apparatus for determining a transport block size that may support the terminal device to implement the method, for example, where the apparatus for determining a transport block size includes a chip system, or the method is applicable to a network device, or the method is applicable to an apparatus for determining a transport block size that may support the network device to implement the method, for example, where the apparatus for determining a transport block size includes a chip system, and the method includes: determining a TBS according to the number of REs and a modulation coding mode included in M first time units, and then repeatedly sending data loaded on symbols corresponding to the first time units S times according to the TBS, wherein M is an integer which is greater than or equal to 1 and less than or equal to K, K is an integer which is greater than or equal to 2, and K represents the number of times of repeatedly sending the data loaded on the symbols corresponding to the first time units in a pre-configuration mode; s is an integer, S is greater than or equal to 1 and less than or equal to K.

In a third aspect, an embodiment of the present application further provides an apparatus for determining a size of a transport block, so as to implement the method described in the first aspect. The means for determining the transport block size may be a terminal device or a means for determining the transport block size that supports the terminal device to implement the method described in the first aspect, for example, the means for determining the transport block size may include a system on chip, and/or the means for determining the transport block size may be a network device or a means for determining the transport block size that supports the network device to implement the method described in the first aspect, for example, the means for determining the transport block size may include a system on chip. For example, the means for determining the transport block size comprises: and a processing unit. The processing unit is configured to determine the TBS according to the number of REs included in the M first time units and the modulation and coding scheme, and decode data on a symbol corresponding to the first time unit received by the receiving unit according to the TBS.

Optionally, the apparatus for determining the size of the transport block may further include a communication interface, configured to receive data carried on a symbol corresponding to the first time unit S times. Wherein, S is an integer, S is greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K represents the number of times of pre-configuring repeated sending of data carried on a symbol corresponding to the first time unit; m is an integer greater than or equal to 1 and less than or equal to K.

In a fourth aspect, an embodiment of the present application further provides an apparatus for determining a transport block size, so as to implement the method described in the second aspect. The means for determining the transport block size may be a terminal device or a device supporting the terminal device to implement the method described in the second aspect, for example, the means for determining the transport block size includes a system on chip, and/or the means for determining the transport block size may be a network device or a device supporting the network device to implement the method described in the second aspect, for example, the means for determining the transport block size includes a system on chip. For example, the means for determining the transport block size comprises: and a processing unit. And the processing unit is configured to determine the TBS according to the number of REs included in the M first time units and the modulation and coding scheme.

Optionally, the apparatus for determining a size of a transport block may further include a communication interface, configured to send data carried on a symbol corresponding to the first time unit repeatedly S times according to the TBS determined by the processing unit. Wherein, M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K represents the number of times of pre-configuring repeated sending of data carried on a symbol corresponding to the first time unit; s is an integer, S is greater than or equal to 1 and less than or equal to K.

With reference to any one of the first to fourth aspects, in a first possible implementation manner, the TBS is determined according to the number of REs included in the K first time units and a modulation and coding scheme, that is, M ═ K. The first transmission time in K is t, which is a time for first sending data carried on a symbol corresponding to the first time unit, where t is a positive integer greater than or equal to 1 and less than or equal to K.

The actual number of repetitions may also be different depending on the first transmission opportunity.

In one possible implementation, S-K-t +1 represents the actual number of repetitions of repeated transmission of data carried on the corresponding symbol of the first time unit in the second time unit.

In another possible implementation, S ═ K denotes the actual number of repetitions of repeated transmission of data carried on the symbol corresponding to the first time unit in the second time unit.

With reference to any one of the first aspect to the second aspect, in another possible implementation manner, the TBS is determined according to the number of REs included in 1 first time unit and a modulation and coding scheme, that is, M is 1. After determining the size of the transport block according to the number of REs and the modulation and coding scheme included in the M first time units, the method comprises the following steps: if the symbols corresponding to the P first time units carry demodulation reference signals (DMRSs), adjusting the TBS according to a first scaling factor to obtain a first adjusted TBS, where the first scaling factor is greater than 1, P is an integer, and P is greater than or equal to 1 and less than K. Or, if all the symbols corresponding to the first time unit are used to carry a Physical Uplink Shared Channel (PUSCH) or a Physical Downlink Shared Channel (PDSCH), adjusting the TBS according to a second scale factor to obtain a second adjusted TBS, where the second scale factor is smaller than 1.

With reference to any one of the third aspect to the fourth aspect, in another possible implementation manner, the TBS is determined according to the number of REs included in 1 first time unit and a modulation and coding scheme, that is, M is 1. If the symbols corresponding to the P first time units bear the DMRS, the processing module is further configured to adjust the TBS according to a first scaling factor to obtain a first adjusted TBS, where the first scaling factor is greater than 1, P is an integer, and P is greater than or equal to 1 and smaller than K. Or, if all the symbols corresponding to the first time unit are used to carry a Physical Uplink Shared Channel (PUSCH) or a Physical Downlink Shared Channel (PDSCH), the processing module is further configured to adjust the TBS according to the second scale factor to obtain a second adjusted TBS, where the second scale factor is smaller than 1.

Thus, it is ensured that when the number of REs included in 1 first time unit is selected for calculating the TBS repeated based on the first time unit, the TBS obtained by multiplying the TBS of the copy itself by the scaling factor is consistent with the average TBS of all repeated copies, and the adjusted TBS is used as the TBS repeated based on the first time unit. By replica is meant the data carried once on a time-frequency resource.

Optionally, in practical applications, the time-domain resource required for repeatedly transmitting data based on the first time unit may also exceed the time-frequency resource included in one second time unit. In this case, when M is equal to K, that is, the TBS is still determined according to the number of REs included in the K first time units and the modulation and coding scheme, it is not suitable because the number of REs included in the K first time units exceeds the number of REs included in one second time unit. Therefore, the embodiments of the present application may also include the following specific implementation manners.

In a fifth aspect, the present embodiment provides a method for determining a transport block size, where the method is applicable to a terminal device, or the method is applicable to an apparatus for determining a transport block size that may support the terminal device to implement the method, for example, where the apparatus for determining a transport block size includes a chip system, or the method is applicable to a network device, or the method is applicable to an apparatus for determining a transport block size that may support the network device to implement the method, for example, where the apparatus for determining a transport block size includes a chip system, and the method includes: and after receiving the data carried on the symbol corresponding to the first time unit for S times, when the time length of the K first time units is longer than that of one second time unit, determining the TBS according to the RE number corresponding to the reference time length and the modulation coding mode, and decoding the data on the symbol corresponding to the first time unit according to the TBS. Wherein, S is an integer, S is greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K represents the number of times of pre-configuring repeated sending of data carried on the symbol corresponding to the first time unit. The reference duration is equal to the duration of the second time unit; or the reference time length is equal to the time lengths of the R first time units, R is the largest integer less than K, and the reference time length is less than the time length of the second time unit.

In the method for determining the size of the transport block provided in the embodiment of the present application, the TBS is calculated based on the number of REs corresponding to the reference time length, data corresponding to the TBS is sent once in one first time unit, and the data is sent repeatedly K times. Thus, the TBS can be calculated using symbols occupied by all or a portion of transport blocks in a preset number of repetitions based on non-slot repetition, in the presence of exceeding an upper limit on the number of symbols employed to calculate the TBS. Meanwhile, the flexibility of a repeated transmission starting point can be ensured while the transmission reliability is ensured.

In a sixth aspect, the present application provides a method for determining a transport block size, where the method is applicable to a terminal device, or the method is applicable to an apparatus for determining a transport block size that may support the terminal device to implement the method, for example, where the apparatus for determining a transport block size includes a chip system, or the method is applicable to a network device, or the method is applicable to an apparatus for determining a transport block size that may support the network device to implement the method, for example, where the apparatus for determining a transport block size includes a chip system, and the method includes: when the time length of K first time units is greater than that of one second time unit, determining the size of a transmission block according to the RE number corresponding to the reference time length and a modulation coding mode, and then repeatedly sending data borne on a symbol corresponding to the first time unit S times according to the TBS, wherein K is an integer greater than or equal to 2 and represents the number of times of pre-configuration of repeated sending of the data borne on the symbol corresponding to the first time unit; s is an integer, S is greater than or equal to 1 and less than or equal to K. The reference duration is equal to the duration of the second time unit; or the reference time length is equal to the time lengths of the R first time units, R is the largest integer less than K, and the reference time length is less than the time length of the second time unit.

In a seventh aspect, an embodiment of the present application further provides an apparatus for determining a size of a transport block, so as to implement the method described in the fifth aspect. The means for determining the transport block size may be a terminal device or a device supporting the terminal device to implement the method described in the fifth aspect, for example, the means for determining the transport block size includes a system on chip, and/or the means for determining the transport block size may be a network device or a device supporting the network device to implement the method described in the fifth aspect, for example, the means for determining the transport block size includes a system on chip. For example, the means for determining the transport block size comprises: and a processing unit. And the processing unit is used for determining the TBS according to the RE number corresponding to the reference time length and the modulation and coding mode when the time length of the K first time units is greater than the time length of one second time unit, and decoding the data on the symbol corresponding to the first time unit received by the receiving unit according to the TBS.

Optionally, the apparatus for determining the size of the transport block may further include a communication interface, configured to receive data carried on a symbol corresponding to the first time unit S times.

In an eighth aspect, an embodiment of the present application further provides an apparatus for determining a transport block size, so as to implement the method described in the above sixth aspect. The means for determining the transport block size may be a terminal device or a means for determining the transport block size that supports the terminal device to implement the method described in the sixth aspect, for example, the means for determining the transport block size includes a system on chip, and/or the means for determining the transport block size may be a network device or a means for determining the transport block size that supports the network device to implement the method described in the sixth aspect, for example, the means for determining the transport block size includes a system on chip. For example, the means for determining the transport block size comprises: and a processing unit. And the processing unit is used for determining the TBS according to the RE number corresponding to the reference time length and the modulation coding mode when the time length of the K first time units is greater than the time length of one second time unit.

Optionally, the apparatus for determining a size of a transport block may further include a communication interface, configured to repeatedly send data carried on a symbol corresponding to the first time unit S times according to the TBS determined by the processing unit.

With reference to any one of the fifth aspect to the eighth aspect, in a possible implementation manner, a first transmission timing in K is t, where the first transmission timing is a timing for first sending data carried on a symbol corresponding to a first time unit, and t is a positive integer greater than or equal to 1 and less than or equal to K.

In a ninth aspect, an embodiment of the present application provides a network device, where the network device has a function of implementing a behavior of the network device in the foregoing method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible design, the network device includes a processor and a transceiver in its structure, and the processor is configured to support the network device to perform the corresponding functions in the above method. The transceiver is used for supporting communication between the network device and the terminal device, and transmitting information or instructions related to the method to the terminal device or receiving information or instructions related to the method transmitted by the terminal device. The network device may also include a memory, coupled to the processor, that retains program instructions and data necessary for the network device.

In a tenth aspect, an embodiment of the present application provides a terminal device, where the terminal device has a function of implementing a behavior of the terminal device in the above method design. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. The modules may be software and/or hardware.

In one possible design, the terminal device includes a transceiver and a processor, and the transceiver is configured to support the terminal device to transmit or receive data carried on symbols corresponding to the first time unit S times. The processor is configured to determine a TBS according to the number of REs included in the M first time units and a modulation and coding scheme, and decode data on a symbol corresponding to the first time unit according to the TBS.

In an eleventh aspect, an embodiment of the present application further provides a computer-readable storage medium, including: computer software instructions; the computer software instructions, when executed in the means for determining a transport block size, cause the means for determining a transport block size to perform the method of the first aspect to the second aspect or the method of the fifth aspect to the sixth aspect.

In a twelfth aspect, embodiments of the present application further provide a computer program product containing instructions, which when run in an apparatus for determining a transport block size, cause the apparatus for determining a transport block size to perform the method of the first aspect to the second aspect or the method of the fifth aspect to the sixth aspect.

In a thirteenth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the functions of the network device or the terminal device in the foregoing method. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a fourteenth aspect, an embodiment of the present application further provides a communication system, where the communication system includes a device for determining a transport block size, which is described in the third aspect and supports the terminal device to implement the method described in the first aspect, and a device for determining a transport block size, which is described in the fourth aspect and supports the network device to implement the method described in the second aspect;

or the communication system includes the terminal device described in the seventh aspect or a device for determining a transport block size that supports the terminal device to implement the method described in the fifth aspect, and the network device described in the eighth aspect or a device for determining a transport block size that supports the network device to implement the method described in the sixth aspect;

or the communication system comprises the terminal device described in the ninth aspect or a device for determining the transport block size that supports the terminal device to implement the method described in the first aspect or the fifth aspect, and the network device described in the tenth aspect or a device for determining the transport block size that supports the network device to implement the method described in the second aspect or the sixth aspect.

In addition, the technical effects brought by the design manners of any aspect can be referred to the technical effects brought by the different design manners in the first aspect and the second aspect, and are not described herein again.

In the embodiment of the present application, names of the terminal device, the network device, and the apparatus for determining the size of the transport block do not limit the device itself, and in an actual implementation, the devices may appear by other names. Provided that the function of each device is similar to the embodiments of the present application, and fall within the scope of the claims of the present application and their equivalents.

In a fifteenth aspect, the present application provides a method for determining a transport block size, where the method is applicable to a terminal device, or the method is applicable to an apparatus for determining a transport block size that may support the terminal device to implement the method, for example, where the apparatus for determining a transport block size includes a chip system, or the method is applicable to a network device, or the method is applicable to an apparatus for determining a transport block size that may support the network device to implement the method, for example, where the apparatus for determining a transport block size includes a chip system, and the method includes: after receiving S times of data carried on the symbols corresponding to the first time units, determining a first TBS according to the number of REs, the first code rate and the first modulation order included in the M first time units, and decoding the data on the symbols corresponding to the first time units according to the first TBS. Wherein S is an integer, S is greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K represents a number of times that a preconfigured or Downlink Control Information (DCI) indicates that data carried on a symbol corresponding to the first time unit is repeatedly transmitted; m is an integer greater than or equal to 1 and less than or equal to K.

In a sixteenth aspect, the present embodiment provides a method for determining a transport block size, where the method is applicable to a terminal device, or the method is applicable to an apparatus for determining a transport block size that may support the terminal device to implement the method, for example, where the apparatus for determining a transport block size includes a chip system, or the method is applicable to a network device, or the method is applicable to an apparatus for determining a transport block size that may support the network device to implement the method, for example, where the apparatus for determining a transport block size includes a chip system, and the method includes: determining a first TBS according to the number of REs, a first code rate and a first modulation order included in M first time units, and then repeatedly sending data loaded on symbols corresponding to the first time units S times according to the first TBS, wherein M is an integer which is greater than or equal to 1 and less than or equal to K, K is an integer which is greater than or equal to 2, and K represents the number of times of repeatedly sending data loaded on symbols corresponding to the first time units in a pre-configuration mode or DCI indicates the number of times of repeatedly sending data; s is an integer, S is greater than or equal to 1 and less than or equal to K.

With reference to the fifteenth aspect or the sixteenth aspect, in a first possible implementation manner, before determining the first TBS according to the number of REs included in the M first time units, the first code rate, and the first modulation order, the method further includes: and determining a second TBS and a reference code rate according to the RE number, the first code rate and the first modulation order included in the K first time units, if the reference code rate is greater than a code rate threshold, determining M according to the code rate threshold, wherein M is less than K, and the code rate corresponding to the first TBS acting on one first time unit determined according to M is less than or equal to the code rate threshold. The reference code rate is a code rate corresponding to the second TBS acting on one first time unit, the first code rate is a code rate indicated by the network device, and the first modulation order is a modulation order indicated by the network device. M is the largest positive integer satisfying that the reference code rate is not greater than the code rate threshold, where the "reference code rate" may refer to a code rate when the TB corresponding to the first TBS is carried on a time-frequency resource occupied by a first time unit for transmission. Hereinafter, it should be understood that the code rate corresponding to the first time unit acted by the first TBS determined by M may refer to a code rate when the TB corresponding to the first TBS is carried on a time-frequency resource occupied by the first time unit for transmission. The code rate when the TB corresponding to the first TBS is carried on the time-frequency resource occupied by one first time unit for transmission can also be understood as the bit number when the TB corresponding to the first TBS is carried on the time-frequency resource occupied by one first time unit for transmission.

According to the method for determining the size of the transmission block, before the data packet is transmitted, the number of the mini time slots used by the TBS is adjusted and calculated, the condition that the reference code rate is larger than the code rate threshold can be overcome, the receiving end decoding failure caused by incomplete transmission of the data packet is avoided, and retransmission is needed once, so that the transmission efficiency is effectively improved, and the transmission delay is reduced.

With reference to the fifteenth aspect or the sixteenth aspect, in a second possible implementation manner, where M is equal to K, and determining the first TBS according to the number of REs included in the M first time units, the first code rate, and the first modulation order includes: and determining a second TBS and a reference code rate according to the number of REs, the first code rate and the first modulation order included in the K first time units, if the reference code rate is greater than a code rate threshold, determining the first TBS according to a scaling factor, wherein the first TBS is smaller than the second TBS, the scaling factor is greater than 0 and smaller than 1, and the code rate corresponding to the action of the first TBS on one first time unit is smaller than or equal to the code rate threshold. The reference code rate is a code rate corresponding to the second TBS acting on one first time unit, the first code rate is indicated by the network device, and the first modulation order is indicated by the network device.

According to the method for determining the size of the transmission block, before the data packet is transmitted, the TBS is determined by utilizing the scale factor, the condition that the reference code rate is larger than the code rate threshold can be overcome, the receiving end decoding failure caused by incomplete transmission of the data packet is avoided, and retransmission is needed once, so that the transmission efficiency is effectively improved, and the transmission delay is reduced.

With reference to the fifteenth aspect or the sixteenth aspect, in a second possible implementation manner, before determining the first TBS according to the number of REs included in the M first time units, the first code rate, and the first modulation order, the method further includes: determining a second TBS and a reference code rate according to the number of REs, a second code rate and a second modulation order included in the K first time units, wherein the reference code rate is a code rate corresponding to the action of the second TBS on one first time unit, the second code rate is indicated by network equipment, and the second modulation order is indicated by the network equipment; determining a first TBS according to the number of resource elements RE included in the M first time units, the first code rate, and the first modulation order, including: if the reference code rate is greater than the code rate threshold, determining a first TBS according to the number of REs, the first code rate and the first modulation order included in the M first time units, wherein the first code rate used for determining the first TBS is the code rate threshold, and the code rate corresponding to the first time unit acted on by the first TBS is less than or equal to the code rate threshold.

According to the method for determining the size of the transmission block, before the data packet is transmitted, the TBS can be determined through the pre-configured code rate, the condition that the reference code rate is larger than the code rate threshold can be overcome, the receiving end decoding failure caused by incomplete transmission of the data packet is avoided, and retransmission is needed once, so that the transmission efficiency is effectively improved, and the transmission delay is reduced.

In a seventeenth aspect, an embodiment of the present application further provides an apparatus for determining a transport block size, so as to implement the method described in the fifteenth aspect. The means for determining the transport block size may be a terminal device or a device supporting the terminal device to implement the method described in the fifteenth aspect, for example, the means for determining the transport block size includes a system on chip, and/or the means for determining the transport block size may be a network device or a device supporting the network device to implement the method described in the fifteenth aspect, for example, the means for determining the transport block size includes a system on chip. For example, the means for determining the transport block size comprises: and a processing unit. The processing unit determines a first TBS according to the number of REs included in the M first time units, the first code rate, and the first modulation order, and decodes data on symbols corresponding to the first time units received by the receiving unit according to the first TBS, where M is an integer greater than or equal to 1 and less than or equal to K.

Optionally, the apparatus for determining a size of a transport block may further include a communication interface, where S times of data carried on a symbol corresponding to the first time unit is received, S is an integer, S is greater than or equal to 1 and is less than or equal to K, K is an integer greater than or equal to 2, and K represents a number of times of repeatedly sending data carried on a symbol corresponding to the first time unit in accordance with preconfiguration or DCI indication.

In an eighteenth aspect, an embodiment of the present application further provides an apparatus for determining a size of a transport block, so as to implement the method described in the sixteenth aspect. The means for determining the size of the transport block is a means for determining the size of the transport block, which is a terminal device or a device supporting the terminal device to implement the method described in the tenth aspect, for example, the means for determining the size of the transport block includes a system on chip, and/or the means for determining the size of the transport block is a network device or a device supporting the network device to implement the method described in the sixteenth aspect, for example, the means for determining the size of the transport block includes a system on chip. For example, the means for determining the transport block size comprises: and a processing unit. The processing unit determines a first TBS according to the number of REs, the first code rate, and the first modulation order included in the M first time units, where M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K represents the number of times for which data carried on a symbol corresponding to the first time unit is repeatedly transmitted in a pre-configuration or DCI indication.

Optionally, the apparatus for determining a size of a transport block may further include a communication interface, configured to repeatedly send data carried on a symbol corresponding to the first time unit S times according to the first TBS determined by the processing unit, where S is an integer and is greater than or equal to 1 and less than or equal to K.

With reference to the seventeenth aspect or the eighteenth aspect, in a first possible implementation manner, the processing unit is further configured to: and determining a second TBS and a reference code rate according to the number of REs, the first code rate and the first modulation order included in the K first time units, and determining M according to the code rate threshold if the reference code rate is greater than the code rate threshold. Wherein M < K, and the code rate corresponding to the first time unit acted by the first TBS determined according to M is less than or equal to the code rate threshold. The reference code rate is a code rate corresponding to the second TBS acting on one first time unit, the first code rate is indicated by the network device, and the first modulation order is indicated by the network device.

With reference to the seventeenth aspect or the eighteenth aspect, in a second possible implementation manner, where M ═ K, the processing unit is configured to: and determining a second TBS and a reference code rate according to the number of REs, the first code rate and the first modulation order included in the K first time units, and determining the first TBS according to a scale factor if the reference code rate is greater than a code rate threshold. The first TBS is smaller than the second TBS, the scaling factor is larger than 0 and smaller than 1, and a code rate corresponding to a first time unit acted by the first TBS is smaller than or equal to a code rate threshold. The reference code rate is a code rate corresponding to the second TBS acting on one first time unit, the first code rate is indicated by the network device, and the first modulation order is indicated by the network device.

With reference to the seventeenth aspect or the eighteenth aspect, in a third possible implementation manner, where M ═ K, the processing unit is further configured to: determining a second TBS and a reference code rate according to the number of REs, a second code rate and a second modulation order included in the K first time units, wherein the reference code rate is a code rate corresponding to the action of the second TBS on one first time unit, the second code rate is indicated by network equipment, and the second modulation order is indicated by the network equipment; a processing unit to: if the reference code rate is greater than the code rate threshold, determining a first TBS according to the number of REs, the first code rate and the first modulation order included in the M first time units, wherein the first code rate used for determining the first TBS is the code rate threshold, and the code rate corresponding to the first time unit acted on by the first TBS is less than or equal to the code rate threshold.

With reference to any of the above aspects, in a fourth possible implementation manner, M is pre-configured, predefined, or indicated by DCI, and a code rate corresponding to a first time unit is smaller than or equal to a code rate threshold according to a first TBS determined by M.

With reference to the foregoing various possible implementation manners, in a fifth possible implementation manner, the duration of the first time unit is a maximum value or a minimum value of the durations of the K first time units.

In a nineteenth aspect, an embodiment of the present application provides a network device, where the network device has a function of implementing a behavior of the network device in practice according to the foregoing method. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In a twentieth aspect, an embodiment of the present application provides a terminal device, where the terminal device has a function of implementing a behavior of the terminal device in the above method design. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. The modules may be software and/or hardware.

In one possible design, the terminal device includes a transceiver and a processor, and the transceiver is configured to support the terminal device to transmit or receive data carried on symbols corresponding to the first time unit S times. The processor is configured to determine a first TBS according to the number of REs included in the M first time units, the first code rate, and the first modulation order, and decode data on a symbol corresponding to the first time unit according to the first TBS.

In a twenty-first aspect, an embodiment of the present application further provides a computer-readable storage medium, including: computer software instructions; the computer software instructions, when executed in the means for determining a transport block size, cause the means for determining a transport block size to perform the method of the fifteenth aspect to the sixteenth aspect described above.

In a twenty-second aspect, embodiments of the present application further provide a computer program product containing instructions, which when run in an apparatus for determining a transport block size, cause the apparatus for determining a transport block size to perform the method of the fifteenth aspect to the sixteenth aspect.

In a twenty-third aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the functions of the network device or the terminal device in the foregoing method. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a twenty-fourth aspect, an embodiment of the present application further provides a communication system, where the communication system includes the terminal device described in the seventeenth aspect or a device for determining a transport block size that supports the terminal device to implement the method described in the fifteenth aspect, and the network device described in the eighteenth aspect or a device for determining a transport block size that supports the network device to implement the method described in the sixteenth aspect;

alternatively, the communication system includes the terminal device described in the nineteenth aspect or a device for determining a transport block size that supports the terminal device to implement the method described in the fifteenth aspect, and the network device described in the twentieth aspect or a device for determining a transport block size that supports the network device to implement the method described in the sixteenth aspect.

In addition, the technical effects brought by the design manners of any aspect can be referred to the technical effects brought by the different design manners of the fifteenth aspect and the sixteenth aspect, and are not described herein again.

Drawings

Fig. 1 is a diagram of an example of a transport block based on slot repetition provided in the prior art;

FIG. 2 is a diagram of an example of a transport block based on mini-slot repetition provided in the prior art;

fig. 3 is a diagram illustrating an architecture of a mobile communication system according to an embodiment of the present application;

fig. 4 is a diagram illustrating an example of a communication system according to an embodiment of the present application;

fig. 5 is a flowchart of a method for determining a size of a transport block according to an embodiment of the present application;

FIG. 6 is a diagram illustrating an example of data transmission based on mini-slot repetition according to an embodiment of the present application;

FIG. 7 is a diagram of an example of data transmission based on mini-slot repetition according to an embodiment of the present application;

FIG. 8 is a third exemplary diagram of data transmission based on mini-slot repetition according to an embodiment of the present application;

fig. 9 is an exemplary diagram of DMRS transmission provided by the prior art;

fig. 10 is a flowchart of a method for determining a size of a transport block according to an embodiment of the present application;

FIG. 11 is a diagram of an example of data transmission based on mini-slot repetition according to an embodiment of the present application;

FIG. 12 is a fifth exemplary diagram of data transmission based on mini-slot repetition according to an embodiment of the present application;

fig. 13 is a first diagram illustrating a composition example of an apparatus for determining a size of a transport block according to an embodiment of the present application;

fig. 14 is a second exemplary diagram illustrating a configuration of an apparatus for determining a size of a transport block according to an embodiment of the present application;

fig. 15 is a diagram illustrating a network device according to an embodiment of the present application;

fig. 16 is a diagram illustrating a composition example of a terminal device according to an embodiment of the present application;

fig. 17 is a flowchart of a method for determining a size of a transport block according to an embodiment of the present application;

fig. 18 is a flowchart of a fourth method for determining a size of a transport block according to an embodiment of the present application;

fig. 19 is a flowchart of a method for determining a size of a transport block according to an embodiment of the present application;

fig. 20 is a third exemplary diagram illustrating a device for determining a size of a transport block according to an embodiment of the present application;

fig. 21 is a fourth exemplary diagram illustrating a configuration of an apparatus for determining a size of a transport block according to an embodiment of the present application;

fig. 22 is a diagram illustrating a network device according to an embodiment of the present application;

fig. 23 is a diagram illustrating a composition example of a terminal device according to an embodiment of the present application.

Detailed Description

The terms "first," "second," and "third," etc. in the description and claims of this application and the above-described drawings are used for distinguishing between different objects and not for limiting a particular order.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

Mobile communication technology has profoundly changed people's lives, but the pursuit of higher performance mobile communication technology has never stopped. In order to cope with explosive mobile data traffic increase, massive mobile communication device connection, and various new services and application scenarios which are continuously emerging, the fifth generation (5G) mobile communication system is in operation. The International Telecommunications Union (ITU) defines three broad classes of application scenarios for 5G and future mobile communication systems: enhanced mobile broadband (eMBB), high-reliability and low-latency communications (URLLC), and massive machine type communications (mtc).

Typical eMBB services are: the services include ultra high definition video, Augmented Reality (AR), Virtual Reality (VR), and the like, and these services are mainly characterized by large transmission data volume and high transmission rate.

Typical mtc services are: the intelligent power distribution automation system has the main characteristics of huge quantity of networking equipment, small transmission data volume and insensitivity of data to transmission delay, and the mMTC terminals need to meet the requirements of low cost and very long standby time.

Typical URLLC services are: the main characteristics of the applications of wireless control in industrial manufacturing or production processes, motion control of unmanned automobiles and unmanned airplanes, and haptic interaction such as remote repair and remote operation are that ultra-high reliability, low time delay, less transmission data volume and burstiness are required. For example, the reliability required for vehicle-to-outside information exchange (V2X) is 99.999%, and the end-to-end delay is 5 milliseconds (ms); the reliability of power distribution (power distribution) is required to be 99.9999%, and the end-to-end delay is 5 ms; factory automation (Factory automation) reliability is 99.9999%, and end-to-end delay is 2 ms.

In the prior art, during the process of data transmission between the terminal device and the network device, it needs to be understood that the amount of data to be transmitted by the terminal device and the amount of data to be received by the network device need to be aligned, and this amount of data may be represented by a Transport Block Size (TBS). As can be understood, the transport block size is the amount of data (number of bits) carried on a certain time-frequency resource. A Transport Block (TB) refers to data carried once on a time-frequency resource. In addition, the data carried on a time-frequency resource for each transmission may be referred to as a duplicate (duplication). The following briefly introduces the procedure of the method for determining TBS provided in the prior art.

First, the number of Resource Elements (REs) in one slot is determined. Specifically, using the formula one

The number of REs in one slot is determined. Wherein N is_RE' represents the number of REs in one slot;

denotes the number of carriers in the frequency domain in one Physical Resource Block (PRB), for example,

indicating the number of symbols scheduled by a Physical Uplink Shared Channel (PUSCH) or a Physical Downlink Shared Channel (PDSCH) in a time slot, the PUSCH being used for transmitting uplink data, the PDSCH being used for transmitting downlink data,

indicates the number of REs occupied by demodulation reference signals (DMRS) in one PRB, including DMRS overhead,

the representation is an overhead configured by an overhead (xohead) parameter in a higher-layer parameter PUSCH-serving cell configuration (PUSCH-serving cell configuration).

Second, the number of REs in the TBS is determined and calculated according to the number of REs in one time slot. Utensil for cleaning buttockOf body by the formula two N_RE＝min(156,N_RE′)·n_PRBObtaining the number of REs used to calculate TBS, where N_REIndicates the number of REs used to calculate TBS; n is_PRBIndicates the number of PRBs.

Third, the TBS is determined based on the number of REs used to calculate the TBS. Specifically, by the formula three N_info＝N_RE·R·Q_mV obtains the number of information bits. Wherein Q is_mFor modulation order, R is code rate, Q_mAnd R is obtained by table lookup in a protocol by a value indicated in a Modulation and Coding Scheme (MCS) field in Downlink Control Information (DCI). V denotes the mother code rate. If N is present_info3824 or less, by the formula four

A quantized intermediate value of the information bit is calculated, wherein,

looking up the table in the protocol to obtain N or more_i'_nfoThe most recent value is used as TBS; if N is present_info3824 by the formula five

A quantized intermediate value of the information bit is calculated, wherein,

if the code rate R is less than or equal to 1/4,

wherein the content of the first and second substances,

if not, then,

wherein the content of the first and second substances,

c denotes the number of coded blocks.

In summary, the TBS is determined by the time-frequency resource scheduled by the PDSCH or the PUSCH, and the code rate and the modulation order included in the MCS. The time-frequency resource of the PDSCH/PUSCH scheduling required by calculation refers to a symbol in a time slot in the time domain. The protocol may be NR R15 and a detailed explanation of the method for determining TBS may be found in the NR R15 protocol 38.214. According to the specification of NR 15, one slot includes 14 symbols. In the prior art, the maximum value of the matching number used for calculating the TBS may be 14.

In addition, in order to improve the reliability of data transmission, the NR R15 version of the protocol supports slot-based (repeat) data transmission. Specifically, the network device configures preset repetition times K in advance, and the terminal device transmits the same transport block on the same symbol allocated to each of the consecutive K time slots. It will be appreciated that the transport blocks transmitted on the same symbol allocated for each of the K slots are the same size and the same content. Fig. 1 is an exemplary diagram of a transport block based on slot repetition provided in the prior art. As shown in fig. 1, a slot n and a slot n +1 are two consecutive arbitrary slots, the slot n includes 14 symbols, and the slot n +1 includes 14 symbols. Assuming that K is 2, the slot n includes symbols 4 to 11 for transmitting data corresponding to the TB for the first time, and the slot n +1 includes symbols 4 to 11 for transmitting data corresponding to the TB for the second time. The data transmitted by the symbol 4 to the symbol 11 included in each slot can be regarded as a transmission block, and the data content transmitted by the symbol 4 to the symbol 11 included in the slot n is the same as the data content transmitted by the symbol 4 to the symbol 11 included in the slot n + 1. In determining the TBS based on the slot repetition, the TBS may be calculated once of the K repetitions, i.e., within a slot, according to the above-described method for determining the TBS, in order not to exceed the upper limit of the calculated TBS, i.e., one slot.

In a Long Term Evolution (LTE) system, the minimum time scheduling unit is a Transmission Time Interval (TTI) with a time length of 1 ms. The 5G supports the time domain scheduling granularity of a time unit level, also supports the time domain scheduling granularity of a micro time unit, and meets the time delay requirements of different services. For example, time units are mainly used for eMBB traffic and micro-time units are mainly used for URLLC traffic. It should be noted that the time units and the micro time units are general terms, and a specific example may be that the time units may be referred to as slots, and the micro time units may be referred to as micro slots, non-slots (non-slot-based), or mini-slots (mini-slots); alternatively, a time unit may be referred to as a subframe, and a micro-time unit may be referred to as a micro-subframe; other similar time domain resource division modes are not limited. The present application is illustrated below with respect to a timeslot and a mini-timeslot, where a timeslot may include, for example, 14 time domain symbols, and a mini-timeslot includes less than 14 time domain symbols, such as 2, 3, 4, 5, 6, or 7, etc.; or, for example, a timeslot may include 7 time domain symbols, and a mini timeslot includes time domain symbols less than 7, such as 2 or 4, and the specific value is not limited. The time domain symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol. For a timeslot with subcarrier spacing of 15 kilohertz (kHz), including 6 or 7 time domain symbols, the corresponding time length is 0.5 ms; for a time slot with a subcarrier spacing of 60kHz, the corresponding time length is shortened to 0.125 ms.

Because the URLLC has a high requirement on delay, in the prior art, mini-slot-based time domain scheduling granularity can be adopted, and data is transmitted in small packets with a small data volume, so as to meet the characteristic of low delay of the URLLC. A packet can be defined as 32 bytes (256 bits) in general. Similarly, in order to improve the reliability of data transmission, data may be repeatedly transmitted on a mini-slot (mini-slot) basis. Fig. 2 is a diagram illustrating an example of a transport block based on mini-slot repetition according to the prior art. As shown in fig. 2, it is assumed that a slot n includes 14 symbols, a mini-slot includes 4 symbols, K is 2, the slot n includes symbols 4 to 7 as a first mini-slot for transmitting data corresponding to a TB for the first time, and the slot n includes symbols 8 to 11 as a second mini-slot for transmitting data corresponding to the TB for the second time. The data transmitted every 4 symbols can be considered as one transport block.

In this case of data transmission based on mini-slot repetition, the time domain resource required for mini-slot repetition may not exceed one slot, i.e. the time domain symbol upper limit specified in the prior art TBS calculation is not reached. For example, if a mini-slot is 2 symbols, the configuration repetition number is 4, and 8 symbols are needed to complete transmission in total, which is less than one slot (14 symbols). Therefore, when data is transmitted based on the mini-slot repetition, it is not necessary to calculate and acquire the TBS based on the mini-slot repetition completely according to the above-described TBS calculation method based on the slot repetition. Therefore, the technical problem to be solved by the present application is how to determine a TBS based on mini-slot repetition.

In order to solve the above problem, an embodiment of the present application provides a method for determining a TBS, which has the following basic principles: and the sending equipment determines the TBS according to the number of REs and the modulation coding mode included in the M first time units, and repeatedly sends data borne on the symbols corresponding to the first time units S times according to the TBS. Then, after receiving S times of data carried on the symbol corresponding to the first time unit, the receiving device determines the TBS according to the number of REs included in the M first time units and the modulation and coding scheme, and decodes the data on the symbol corresponding to the first time unit according to the TBS. Wherein, M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, K represents the number of times of pre-configuring repeated sending of data carried on the symbol corresponding to the first time unit, S is an integer, S is greater than or equal to 1 and less than or equal to K. Therefore, the TBS can be calculated by using symbols occupied by all or part of the transport blocks in the preset repetition times based on the mini-slot repetition on the premise of not exceeding the upper limit of the number of symbols used for calculating the TBS.

It should be noted that the first time unit described in this embodiment of the present application may be the above-mentioned micro time unit, micro time slot, non-time slot, or mini time slot, and the second time unit may be the above-mentioned time unit. In addition, for uplink transmission, the sending device may be a terminal device, the receiving device may be a base station, and the data carried on the symbol corresponding to the first time unit is repeatedly sent S times as uplink data; for downlink transmission, the sending device may be a base station, the receiving device may be a terminal device, and the data carried on the symbol corresponding to the first time unit is repeatedly sent S times as downlink data.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 3 is a diagram showing an example of an architecture of a mobile communication system that can be applied to the embodiment of the present application. As shown in fig. 3, the mobile communication system includes a core network device 301, a network device 302, and at least one terminal device (such as a terminal device 303 and a terminal device 304 shown in fig. 3). The terminal equipment is connected with the network equipment in a wireless mode, and the network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the network device may be separate physical devices, or the function of the core network device and the logic function of the network device may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the network device. The terminal equipment may be fixed or mobile. Fig. 3 is a schematic diagram, and other network devices, such as a wireless relay device and a wireless backhaul device, may also be included in the mobile communication system, which is not shown in fig. 3. The embodiments of the present application do not limit the number of core network devices, and terminal devices included in the mobile communication system.

The terminal device may be a wireless terminal device capable of receiving network device scheduling and indication information, and the wireless terminal device may be a device providing voice and/or data connectivity to a user, or a handheld device having a wireless connection function, or other processing device connected to a wireless modem. Wireless terminal devices, which may be mobile terminal devices such as mobile telephones (or "cellular" telephones), computers, and data cards, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks or the internet via a radio access network (e.g., a RAN). Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), tablet computers (pads), and computers with wireless transceiving functions. A wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a Mobile Station (MS), a remote station (remote station), an Access Point (AP), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), a Subscriber Station (SS), a user terminal device (CPE), a terminal (terminal), a User Equipment (UE), a Mobile Terminal (MT), etc. For URLLC application scenarios, the terminal device may be a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and so on.

The network device may be a Base Station (BS) for wireless communication, a base station controller or an evolved node b (eNodeB), and the like. And may also be referred to as a wireless access point, a transceiver station, a relay station, a cell, a Transmit and Receive Port (TRP), and so on. Specifically, the network device is a device deployed in a radio access network to provide a wireless communication function for a terminal device, and its main functions include one or more of the following functions: management of radio resources, compression of Internet Protocol (IP) headers and encryption of user data streams, selection of Mobility Management Entity (MME) when a user equipment is attached, routing of user plane data to Serving Gateway (SGW), organization and transmission of paging messages, organization and transmission of broadcast messages, measurement for mobility or scheduling, and configuration of measurement reports, etc. Network devices may include various forms of cellular base stations, home base stations, cells, wireless transmission points, macro base stations, micro base stations, relay stations, wireless access points, and so forth. In systems using different radio access technologies, the names of devices that function as network devices may differ. For example, in a 5G NR system, it is called a 5G base station (gNB) or the like. As communication technologies evolve, the names of network devices may change. Furthermore, the network device may be other means for providing wireless communication functionality for the terminal device, where possible. The embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices. For convenience of description, in the embodiments of the present application, an apparatus for providing a wireless communication function for a terminal device is referred to as a network device.

The application is mainly applied to a 5G NR system. The present application can also be applied to other communication systems, as long as the existing entity in the communication system needs to send the indication information of the transmission direction, and another entity needs to receive the indication information and determine the transmission direction within a certain time according to the indication information. Fig. 4 is a diagram illustrating an example of a communication system according to an embodiment of the present application. As shown in fig. 4, the base station and the terminal apparatuses 1 to 6 constitute a communication system. In this communication system, terminal apparatuses 1 to 6 can transmit uplink data to a base station, and the base station receives the uplink data transmitted from terminal apparatuses 1 to 6. The base station may transmit downlink data to the terminal apparatuses 1 to 6, and the terminal apparatuses 1 to 6 may receive the downlink data. Further, the terminal apparatuses 4 to 6 may constitute one communication system. In the communication system, terminal device 5 may receive uplink information transmitted by terminal device 4 or terminal device 6, and terminal device 5 may transmit downlink information to terminal device 4 or terminal device 6.

The network equipment and the terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons, and satellites. The embodiment of the application does not limit the application scenarios of the network device and the terminal device.

The network device and the terminal device may communicate with each other through a licensed spectrum (licensed spectrum), may communicate with each other through an unlicensed spectrum (unlicensed spectrum), and may communicate with each other through both the licensed spectrum and the unlicensed spectrum. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

The embodiments of the present application may be applicable to downlink signal transmission, may also be applicable to uplink signal transmission, and may also be applicable to device-to-device (D2D) signal transmission. For D2D signaling, the sending device is a terminal device and the corresponding receiving device is also a terminal device. For uplink signal transmission, the sending device is a terminal device, the corresponding receiving device is a network device, and data carried on a symbol corresponding to the first time unit is repeatedly sent S times according to the TBS as uplink data. For downlink signal transmission, the sending device is a network device, the corresponding receiving device is a terminal device, and the TBS repeatedly sends data carried on a symbol corresponding to the first time unit S times as downlink data.

The following describes a method for determining the size of a transport block in detail by taking uplink signal transmission as an example. Fig. 5 is a flowchart of a first method for determining a size of a transport block according to an embodiment of the present application. In the embodiment of the present application, it is assumed that the first time unit is a mini-slot and the second time unit is a slot. The time domain resources required for the repeated transmission of data on a mini-slot basis are within one slot. As shown in fig. 5, the method may include:

s501, the terminal equipment determines the TBS according to the RE number and the modulation coding mode included by the M mini time slots.

Wherein M is an integer greater than or equal to 1 and less than or equal to K. K represents the number of times of repeatedly sending data carried on the symbol corresponding to the mini time slot in the pre-configuration mode, and is an integer greater than or equal to 2. In practical application, the preset repetition number K may be configured in advance through a high-level parameter, and the high-level parameter may be repK. Alternatively, the preset number of repetitions K may also be dynamically indicated by DCI. In the following, the present application is described by taking K as an example of the predetermined number of repetitions. The preset repetition number K may take different values according to the number of symbols included in the mini-slot.

For example, assume that a slot includes 14 symbols. If the mini-slot includes 2 symbols, the predetermined number of repetitions K may be 2, 3, 4, 5, 6, or 7. Accordingly, 2 mini-slots comprise 2 symbols, 3 mini-slots comprise 6 symbols, 4 mini-slots comprise 8 symbols, 5 mini-slots comprise 10 symbols, 6 mini-slots comprise 12 symbols, and 7 mini-slots comprise 14 symbols. Alternatively, the mini-slot includes 3 symbols, and the preset number of repetitions K may be 2, 3, or 4. Alternatively, the mini-slot includes 4 symbols, and the preset number of repetitions K may be 2 or 3. Alternatively, the mini-slot includes 5 symbols, and the preset repetition number K may be 2. Alternatively, the mini-slot includes 6 symbols, and the preset repetition number K may be 2. Alternatively, the mini-slot includes 7 symbols, and the preset repetition number K may be 2.

The method for determining TBS is described below with different values of M.

In a first possible implementation manner, the transmitting device may determine the transport block size according to the number of REs included in the K mini slots and the modulation and coding scheme, that is, M ═ K. Specifically, the method can comprise the following steps:

first, the number of REs included in K mini slots is determined. Specifically, using the formula six

The number of REs included in the K mini-slots is determined. Wherein N is_RE"represents the number of REs included in the K mini-slots;

which represents the number of carriers in the frequency domain in one PRB, or the number of carriers corresponding to a time domain unit occupied by repeated data transmission based on mini slots, for example,

a time domain unit may also be referred to as a time unit,

denotes the number of symbols occupied by all PUSCH or PDSCH repeated within K mini-slots, e.g., one mini-slot includes 2 symbols, K-4,

wherein the content of the first and second substances,

indicates the number of REs occupied by the DMRS in one PRB, including DMRS overhead,

the representation is the overhead configured by the xOverhead parameter in the higher layer parameter PUSCH-servingcellconfig.

Second, the number of REs used to calculate the TBS is determined based on the number of REs included in the K mini-slots. Specifically, by the formula seven N_RE＝min(156,N_RE″)·n_PRBObtaining the number of REs used to calculate TBS, where N_REDenotes the number of REs, n, used to calculate TBS_PRBIndicates the number of PRBs.

Third, the TBS is determined based on the number of REs used to calculate the TBS. Specifically, by the formula three N_info＝N_RE·R·Q_mV obtains the number of information bits. Wherein Q is_mFor modulation order, R is code rate, Q_mAnd R is obtained by table lookup in the protocol by the value indicated by the MCS field in the DCI. V denotes the mother code rate. If N is present_info3824 or less, by the formula four

A quantized intermediate value of the information bit is calculated, wherein,

looking up a table in the protocol to obtain not less than N'_infoThe most recent value is used as TBS; or, if N is_info3824 by the formula five

A quantized intermediate value of the information bit is calculated, wherein,

if the code rate R is less than or equal to 1/4,

wherein the content of the first and second substances,

if not, then,

wherein the content of the first and second substances,

c denotes the number of coded blocks.

Optionally, the TBS may be obtained not only by the above formulas three to five, but also by looking up a table according to the number of REs and the modulation and coding scheme. Specifically, the TBS is obtained by querying a Transport Block Size Table (TBST) according to the number of REs used for calculating the TBS and an index of a modulation and coding scheme. As shown in table 1.

TABLE 1

The TBS values in table 1 are determined by the modulation and coding scheme, the number of REs used to calculate the TBS, and the overhead (overhead). Such as N_TBS＝N_RE*coderate*Q_m-overlap and rounding up the calculated value. Wherein N is_TBSValue of expression, N_RERepresenting the number of REs, code representing the target code rate, Q_mIndicating modulation order and overhead. The overhead may be an overhead of a reference signal and/or a system loss. The target code rate and modulation order may be obtained from the MCS table in the NR R15 protocol 38.213. For example, as shown in table 2.

TABLE 2

When a higher-layer parameter PUSCH-tp-pi2BPSK is configured, that is, the modulation scheme is (pi/2) BPSK, and the modulation order is 1, q is 1, and otherwise q is 2.

In the prior art, if a whole block resource (e.g., a timeslot or n timeslots) is directly configured for transmitting data corresponding TO a TB, when a Transmission Opportunity (TO) is missed in the whole block resource, the configured whole block resource needs TO be missed, and data corresponding TO the TB is retransmitted in a next whole block resource. For downlink transmission, missing means that the beginning of the whole resource is an uplink symbol and downlink data cannot be transmitted. For example, as shown in fig. 1, symbol 4 of slot n is an uplink symbol, if downlink data needs to be transmitted on symbol 4, the entire slot n needs to be missed, and when slot n +1 is waited to be reached, if symbol 4 of slot n +1 is a downlink symbol, downlink data can be transmitted on symbol 4 of slot n + 1. Similarly, for uplink transmission, the miss means that the whole resource starts with a downlink symbol and uplink data cannot be transmitted. Alternatively, the entire block of resources is an unlicensed (grant free) resource. By transmission opportunity is understood the opportunity to transmit a copy, which may refer to data that needs to be transmitted repeatedly. The first transmission opportunity refers to an opportunity to transmit a copy for the first time. The first copy refers to the data transmitted for the first time.

However, flexibility of the transmission start point can be achieved when data is repeatedly transmitted on a mini-slot basis. The first transmission time in K is t, which is a time for first sending data carried on a symbol corresponding to the mini timeslot, where t is a positive integer greater than or equal to 1 and less than or equal to K. For example, when K copies are repeatedly transmitted, if the first copy in the data repeated transmission based on the mini-slot cannot be transmitted in the first symbol of the first mini-slot, for example, the first symbol of the first mini-slot is a downlink symbol and cannot transmit uplink data, the transmission of the first copy may be postponed until the next transmission opportunity (for example, the first symbol of the second mini-slot) and so on until the mini-slot capable of transmitting the first copy is postponed. And if the transmission opportunity is not determined in the time slot in which the K mini time slots are positioned, the transmission time is determined again in the next time slot. Illustratively, as shown in fig. 2, the symbol 4 of the first mini-slot in the slot n is an uplink symbol, if downlink data needs to be transmitted on the symbol 4, the first mini-slot needs to be missed, and when a second mini-slot is waited to arrive, if the symbol 8 of the second mini-slot is a downlink symbol, downlink data can be transmitted on the symbol 8 of the second mini-slot.

It should be noted that, in one possible implementation, the number of symbols included in the K mini slots is based on scheduled transmission (grant-based), that is, the time domain resource selected when determining the TBS is the number of symbols scheduled repeatedly for K times in one slot, and S ═ K-t +1 represents the actual number of times of repeated transmission of data carried on the symbol corresponding to the mini slot in the slot. Illustratively, as shown in fig. 2, K is 2, t is 1, and S is 1, which indicates that the actual number of repetitions of data carried on symbols corresponding to the mini-slots is repeatedly transmitted in a slot is 1. Alternatively, as shown in fig. 6, it is assumed that a mini slot includes 2 symbols, K is 4, t is 2, and S is 3, which indicates that the actual number of repetitions of repeatedly transmitting data carried on the symbol corresponding to the mini slot in the slot is 3.

In another possible implementation manner, the number of symbols included in the K mini-slots is based on a schedule-free transmission (grant-free), the time domain resource selected when determining the TBS is the number of symbols required for K repetitions in one slot, and S ═ K represents the actual number of times of repeated transmission of data carried on the symbols corresponding to the mini-slots in the slot. The time-frequency resource with the number of symbols K repetitions called "required" is not dynamically scheduled by the network device, but is directly transmitted on the pre-configured scheduling-free time-frequency resource. For example, as shown in fig. 7, it is assumed that a mini-slot includes 2 symbols, K is 4, t is 2, and S is 4, which indicates that the actual number of repetitions of repeatedly transmitting data carried on the symbol corresponding to the mini-slot in the slot is 4. The fourth copy may be transmitted using the fifth mini-slot. Alternatively, K copies are actually transmitted, and the symbols occupied by K mini-slots may span two slots. For example, as shown in fig. 8, it is assumed that a mini-slot includes 4 symbols, K is 4, t is 2, and S is 4, which indicates that the actual number of repetitions of repeatedly transmitting data carried on the symbol corresponding to the mini-slot in the slot is 4. The last two symbols used by the second transport block, and the symbols used by the third and fourth transport blocks are all symbols in slot n + 1.

Further, in the related art, if the actual repetition number is smaller than the preconfigured repetition number when data is repeatedly transmitted on a slot basis, the packet error rate of the actual repetition number is smaller than the packet error rate of the preconfigured repetition number. Assuming that the block error rate (BLER) of one transmission is 10 "1, a packet error rate of 10" 4 can be achieved by four repetitions. However, the actual number of repetitions is 3, and only a reliable packet error rate of 10-3 can be achieved. Therefore, when the pre-configuration repetition number cannot be guaranteed, the reliability of transmission may be affected. However, the data is repeatedly transmitted based on mini-slots in the embodiment of the present application, so that the flexibility of the transmission starting point is achieved, and the next transmission opportunity may still be in the time slot, so that K times of repeated transmission or K-t +1 times of transmission can be achieved, and when the number of times of repeated pre-configuration is ensured, the reliability of transmission is also ensured, and the reliability can be effectively improved. Even if the actual number of repetitions is less than the preconfigured number of repetitions, the reliability of the transmission is higher than in the prior art when the preconfigured number of repetitions is reduced.

In a second possible implementation, the transmitting device may determine the transport block size according to the number of REs included in 1 mini-slot and the modulation and coding scheme, that is, M is 1. Specifically, a region of the first possible implementation manner is that when the number of REs included in the K mini slots is determined, the number of symbols occupied by all repeated PUSCHs or PDSCHs in 1 mini slot is used, and other method steps may refer to detailed descriptions in the first possible implementation manner, and are not described herein again in this embodiment of the present application.

In the prior art, under the condition of repeatedly transmitting data based on time slots, 1-2 symbols in each time slot are used for bearing the DMRS. On the other hand, in the case of transmitting data based on mini slots, the unit of mini slots is small, and is generally 2, 4, or 7 symbols. If 1 ~ 2 symbols among the symbols included in the mini-slot are also used to carry the DMRS, overhead is too large for mini-slot scheduling. Therefore, a method of sharing dmrs (dmrs sharing) is proposed. Specifically, DMRSs do not need to be configured or scheduled for each mini-slot, but are configured or scheduled for one mini-slot, DMRSs are shared by several mini-slots, and a receiving device performs channel estimation on a physical channel after receiving the DMRSs, as shown in fig. 9, DMRSs are configured for a first symbol in a first mini-slot and a first symbol in a third mini-slot, respectively, a second mini-slot may share the DMRS configured for the first symbol in the first mini-slot, and a fourth mini-slot may share the DMRS configured for the first symbol in the third mini-slot, so that the receiving device correctly demodulates a PUCCH or a PUSCH carried on the several mini-slots.

In this case, only one symbol in the first mini-slot and the third mini-slot may be used for transmission of PUCCH or PUSCH, and two symbols may be used in the second mini-slot and the fourth mini-slot for transmission of PUCCH or PUSCH, resulting in that when the TBS based on mini-slot repetition is determined, the TBS of the mini-slot carrying DMRS and the mini-slot not carrying DMRS are different.

In an embodiment of the present application, an associated scale factor may be configured for a mini-slot based on mini-slot repetition, and the scale factor is related to whether a symbol on its associated mini-slot carries a DMRS. For example, after the transport block size is determined according to the number of REs included in 1 mini slot and the modulation and coding scheme, if the symbols corresponding to P mini slots carry DMRSs, the TBS is adjusted according to a first scaling factor to obtain a first adjusted TBS, where the first scaling factor is greater than 1, P is an integer, and P is greater than or equal to 1 and less than K. And if all the symbols corresponding to the first time unit are used for bearing the PUSCH or the PDSCH, adjusting the TBS according to a second scale factor to obtain a second adjusted TBS, wherein the second scale factor is smaller than 1. The scaling factor may be preconfigured by higher layer parameters or may be dynamically indicated by the DCI. Thus, it is ensured that when the number of REs included in 1 mini-slot is selected for calculating the TBS based on mini-slot repetition, the TBS obtained by multiplying the TBS of the copy itself by the scaling factor is the same as the average TBS of all the repeated copies, and the adjusted TBS is used as the TBS based on mini-slot repetition.

And S502, the terminal equipment repeatedly sends data borne on the symbol corresponding to the mini time slot for S times.

And mapping the bit number corresponding to the TBS to a symbol corresponding to one mini-slot, and repeatedly sending data borne on the symbol corresponding to the mini-slot S times through S mini-slots. S is an integer, S is greater than or equal to 1 and less than or equal to K. In the actual data transmission process, the data carried on the symbol corresponding to the mini-slot may be repeatedly transmitted based on the mini-slot K times according to the pre-configured repetition number, or the data carried on the symbol corresponding to the mini-slot may be repeatedly transmitted based on the mini-slot K times according to the number less than the pre-configured repetition number. S represents the actual number of repetitions of repeated transmission of data carried on symbols corresponding to the mini-slots within the slot.

S503, the network device receives the data carried on the symbol corresponding to the mini time slot S times.

S504, the network device determines the TBS according to the RE number and the modulation coding mode included in the M mini time slots.

For a specific explanation of S503, reference may be made to the detailed explanation of S501, and details of the embodiments of the present application are not described herein.

And S505, the network equipment decodes the data on the symbol corresponding to the mini time slot according to the TBS.

The data can be demodulated and decoded according to a modulation and coding mode, which may specifically refer to the prior art, and the embodiments of the present application are not described herein again.

In addition, the main difference between the data transmission based on the mini-slot repetition and the data transmission based on the slot repetition is that firstly, data carried on symbols corresponding to the mini-slot can be transmitted in continuous slots, and the symbols used for transmission in continuous different slots are different; secondly, the mini time slots used for data repeated transmission carried on the symbols corresponding to the mini time slots are also continuous; third, there are at least some or all of the two copies in a time slot.

The method for determining the size of the transport block according to the embodiment of the application determines the size of the transport block according to the number of REs included in K mini-slots and the modulation and coding scheme, or determines the size of the transport block according to the number of REs included in 1 mini-slot and the modulation and coding scheme, so that the TBS can be calculated by using symbols occupied by all transport blocks or part of transport blocks in preset repetition times based on mini-slot repetition on the premise of not exceeding the upper limit of the number of symbols used for calculating the TBS.

Alternatively, in practical applications, the time domain resource required for repeating data transmission based on mini-slots may also be the time frequency resource included in more than one slot. For example, assume that a slot includes 14 symbols. If the mini-slot includes 2 symbols, the predetermined number of repetitions K is at least 8. Accordingly, 8 mini-slots comprise 16 symbols, with the duration of 8 mini-slots being greater than the duration of one slot. Alternatively, the mini-slot includes 3 symbols and the predetermined number of repetitions K is at least 5. Accordingly, 5 mini-slots comprise 15 symbols, the duration of 5 mini-slots being greater than the duration of one slot. Alternatively, the mini-slot includes 4 symbols and the predetermined number of repetitions K is at least 4. Alternatively, the mini-slot includes 5 symbols and the predetermined number of repetitions K is at least 3. Alternatively, the mini-slot includes 6 symbols and the predetermined number of repetitions K is at least 3. Alternatively, the mini-slot includes 7 symbols and the predetermined number of repetitions K is at least 3. The following is an example of a method for determining the size of a transport block in the case where time-domain resources required for repeated data transmission based on mini-slots may also exceed time-frequency resources included in one slot.

Fig. 10 is a flowchart of a method for determining a size of a transport block according to an embodiment of the present application. In the embodiment of the present application, it is assumed that time domain resources required for data transmission based on mini-slot repetition exceed one slot. As shown in fig. 10, the method may include:

s1001, the terminal equipment determines TBS according to the RE number corresponding to the reference time length and the modulation coding mode.

In one possible implementation, the reference duration may be equal to the duration of the time slot. For example, as shown in fig. 11, it is assumed that one slot includes 14 symbols; one mini-slot includes 4 symbols, K is 4, and 4 mini-slots include 16 symbols, so that the duration of 4 mini-slots is greater than the duration of one slot, i.e., the last two symbols of the 4 th mini-slot do not belong to the symbols of slot n, which are the first symbol (symbol 0) and the second symbol (symbol 1) of slot n + 1. In this case, the number of REs in one slot may be determined according to the number of symbols scheduled for the PUSCH or PDSCH in one slot, the number of REs for the calculated TBS may be determined according to the number of REs in one slot, and the TBS may be determined according to the number of REs for the calculated TBS. For details, reference may be made to the detailed description in S501, and details of the embodiments of the present application are not described herein.

In another possible implementation manner, the reference duration is equal to the durations of R mini-slots, where R is the largest integer smaller than K, and the reference duration is smaller than the duration of the slot.

Illustratively, as shown in fig. 11, one mini-slot includes 4 symbols, K is 4, in this case, the number of REs in 3 mini-slots may be determined according to the number of symbols scheduled by PUSCH or PDSCH in one 3 mini-slots, R is 3, the number of REs in the calculated TBS is determined according to the number of REs in 3 mini-slots, and the TBS is determined according to the number of REs in the calculated TBS. For details, reference may be made to the detailed description in S501, and details of the embodiments of the present application are not described herein.

In addition, flexibility of a transmission start point can be achieved when data is repeatedly transmitted on a mini-slot basis. The first transmission time in K is t, which is a time for first sending data carried on a symbol corresponding to the mini timeslot, where t is a positive integer greater than or equal to 1 and less than or equal to K. For example, as shown in fig. 11, if symbol 0 in slot n is an uplink symbol and data carried in the symbol corresponding to the mini slot needs to be transmitted for the first time is uplink data, in this case, t is 1, which indicates that the first mini slot can be used for transmitting uplink data. Similarly, if the symbol 0 in the timeslot n is a downlink symbol and data carried on the symbol corresponding to the mini timeslot needs to be transmitted for the first time is downlink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting downlink data. Accordingly, R may be equal to 3. However, if the symbol 0 in the slot n is an uplink symbol and data carried on the symbol corresponding to the mini-slot needs to be transmitted for the first time is downlink data, in this case, when waiting for the second mini-slot to arrive, it is determined whether the first symbol (symbol 4) of the second mini-slot is a downlink symbol, and if the first symbol (symbol 4) of the second mini-slot is a downlink symbol, t is 2, it indicates that the second mini-slot can be used for transmitting downlink data, as shown in fig. 12. And so on until deferred to a mini-slot capable of transmitting the first copy.

If the mini-slot includes 2 symbols, the predetermined number of repetitions K is at least 8. Accordingly, 8 mini-slots comprise 16 symbols, with the duration of 8 mini-slots being greater than the duration of one slot. If the symbol 0 in the timeslot n is an uplink symbol and data carried in the symbol corresponding to the mini timeslot needs to be transmitted for the first time is uplink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting uplink data. Similarly, if the symbol 0 in the timeslot n is a downlink symbol and data carried on the symbol corresponding to the mini timeslot needs to be transmitted for the first time is downlink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting downlink data. Accordingly, R may be equal to 7. However, if symbol 0 in slot n is an uplink symbol and data carried on a symbol corresponding to a mini-slot needs to be transmitted for the first time is downlink data, in this case, when waiting for the second mini-slot to arrive, it is determined whether the first symbol (symbol 2) of the second mini-slot is a downlink symbol, and if the first symbol (symbol 2) of the second mini-slot is a downlink symbol, t is 2, it indicates that the second mini-slot can be used for transmitting downlink data.

Alternatively, the mini-slot includes 3 symbols and the predetermined number of repetitions K is at least 5. Accordingly, 5 mini-slots comprise 15 symbols, the duration of 5 mini-slots being greater than the duration of one slot. If the symbol 0 in the timeslot n is an uplink symbol and data carried in the symbol corresponding to the mini timeslot needs to be transmitted for the first time is uplink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting uplink data. Similarly, if the symbol 0 in the timeslot n is a downlink symbol and data carried on the symbol corresponding to the mini timeslot needs to be transmitted for the first time is downlink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting downlink data. Accordingly, R may be equal to 4. However, if symbol 0 in slot n is an uplink symbol and data carried on a symbol corresponding to a mini-slot needs to be transmitted for the first time is downlink data, in this case, when waiting for the second mini-slot to arrive, it is determined whether the first symbol (symbol 3) of the second mini-slot is a downlink symbol, and if the first symbol (symbol 3) of the second mini-slot is a downlink symbol, t is 2, it indicates that the second mini-slot can be used for transmitting downlink data.

Alternatively, the mini-slot includes 5 symbols and the predetermined number of repetitions K is at least 3. If the symbol 0 in the timeslot n is an uplink symbol and data carried in the symbol corresponding to the mini timeslot needs to be transmitted for the first time is uplink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting uplink data. Similarly, if the symbol 0 in the timeslot n is a downlink symbol and data carried on the symbol corresponding to the mini timeslot needs to be transmitted for the first time is downlink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting downlink data. Accordingly, R may be equal to 2. However, if symbol 0 in slot n is an uplink symbol and data carried on a symbol corresponding to a mini-slot needs to be transmitted for the first time is downlink data, in this case, when waiting for the second mini-slot to arrive, it is determined whether the first symbol (symbol 5) of the second mini-slot is a downlink symbol, and if the first symbol (symbol 5) of the second mini-slot is a downlink symbol, t is 2, it indicates that the second mini-slot can be used for transmitting downlink data.

Alternatively, the mini-slot includes 6 symbols and the predetermined number of repetitions K is at least 3. If the symbol 0 in the timeslot n is an uplink symbol and data carried in the symbol corresponding to the mini timeslot needs to be transmitted for the first time is uplink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting uplink data. Similarly, if the symbol 0 in the timeslot n is a downlink symbol and data carried on the symbol corresponding to the mini timeslot needs to be transmitted for the first time is downlink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting downlink data. Accordingly, R may be equal to 2. However, if symbol 0 in slot n is an uplink symbol and data carried on a symbol corresponding to a mini-slot needs to be transmitted for the first time is downlink data, in this case, when waiting for the second mini-slot to arrive, it is determined whether the first symbol (symbol 6) of the second mini-slot is a downlink symbol, and if the first symbol (symbol 6) of the second mini-slot is a downlink symbol, t is 2, it indicates that the second mini-slot can be used for transmitting downlink data.

Alternatively, the mini-slot includes 7 symbols and the predetermined number of repetitions K is at least 3. If the symbol 0 in the timeslot n is an uplink symbol and data carried in the symbol corresponding to the mini timeslot needs to be transmitted for the first time is uplink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting uplink data. Similarly, if the symbol 0 in the timeslot n is a downlink symbol and data carried on the symbol corresponding to the mini timeslot needs to be transmitted for the first time is downlink data, at this time, t is 1, which indicates that the first mini timeslot can be used for transmitting downlink data. Accordingly, R may be equal to 2. However, if symbol 0 in slot n is an uplink symbol and data carried on a symbol corresponding to a mini-slot needs to be transmitted for the first time is downlink data, in this case, when waiting for the second mini-slot to arrive, it is determined whether the first symbol (symbol 7) of the second mini-slot is a downlink symbol, and if the first symbol (symbol 7) of the second mini-slot is a downlink symbol, t is 2, it indicates that the second mini-slot can be used for transmitting downlink data.

And S1002, the terminal equipment repeatedly sends data borne on the symbol corresponding to the mini time slot for S times.

And mapping the bit number corresponding to the TBS to a symbol corresponding to one mini-slot, and repeatedly sending data borne on the symbol corresponding to the mini-slot S times through S mini-slots. S is an integer, S is greater than or equal to 1 and less than or equal to K. In the actual data transmission process, the data carried on the symbol corresponding to the mini-slot may be repeatedly transmitted based on the mini-slot K times according to the pre-configured repetition number, or the data carried on the symbol corresponding to the mini-slot may be repeatedly transmitted based on the mini-slot K times according to the number less than the pre-configured repetition number.

And S1003, the network equipment receives data borne on the symbol corresponding to the mini time slot for S times.

S1004, the network equipment determines the TBS according to the RE number corresponding to the reference time length and the modulation coding mode.

For a specific explanation of S1004, reference may be made to the detailed explanation of S1001, and details of the embodiments of the present application are not described herein again.

S1005, the network device decodes the data on the symbol corresponding to the mini slot according to the TBS.

In the method for determining the size of the transport block, when the duration of K mini time slots is greater than the duration of one time slot, the TBS may be determined according to the number of REs corresponding to the reference duration and the modulation and coding scheme, so that the TBS may be calculated using symbols occupied by all or part of transport blocks in the preset number of repetitions based on the repetition of the mini time slots.

For downlink signal transmission, the sending device is a network device, the corresponding receiving device is a terminal device, and the TBS repeatedly sends data carried on a symbol corresponding to the first time unit S times as downlink data. For the process of determining the size of the transmission block in the downlink signal transmission process, the execution main bodies in fig. 5 and fig. 10 may be interchanged, and for the detailed explanation, reference may be made to the method steps shown in fig. 5 and fig. 10, which is not described herein again in this embodiment of the present application.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of the terminal device, the network device, and the interaction between the terminal device and the network device. It is understood that, for each network element, for example, the terminal device and the network device, to implement each function in the method provided in the foregoing embodiments of the present application, the terminal device and the network device include a hardware structure and/or a software module corresponding to executing each function. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the terminal device and the network device may be divided into the functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

Fig. 13 shows a possible example of the composition of the apparatus for determining a transport block size, which is described above and in the embodiments, in the case of dividing each functional module by corresponding functions, where the apparatus for determining a transport block size can perform the steps performed by the terminal device in any of the method embodiments of the present application. As shown in fig. 13, the apparatus for determining a transport block size is an apparatus for determining a transport block size of a terminal device or a terminal device supporting the method provided in the embodiment, for example, the apparatus for determining a transport block size may be a chip system. The apparatus for determining a transport block size may include: processing unit 1301, transmitting unit 1302, and receiving unit 1303.

For uplink signal transmission, the processing unit 1301 is configured to support the apparatus for determining the transport block size to perform the method described in the embodiment of the present application. For example, the processing unit 1301 is configured to execute or support the apparatus for determining the transport block size to execute S501 in the method for determining the transport block size shown in fig. 5 or S1001 in the method for determining the transport block size shown in fig. 10.

A sending unit 1302, configured to send data, for example, to support the apparatus for determining the transport block size to execute S502 in the method for determining the transport block size shown in fig. 5, or S1002 in the method for determining the transport block size shown in fig. 10.

For downlink signal transmission, the receiving unit 1303 is configured to support the apparatus for determining the size of the transport block to perform the method described in the embodiment of the present application. For example, the receiving unit 1303 is configured to receive data, for example, to support the apparatus for determining the transport block size to perform S503 in the method for determining the transport block size shown in fig. 5, or S1003 in the method for determining the transport block size shown in fig. 10.

A processing unit 1301 for executing or supporting the apparatus for determining the transport block size to execute S504 and S505 in the method for determining the transport block size shown in fig. 5, and S1004 and S1005 in the method for determining the transport block size shown in fig. 10.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

The apparatus for determining the size of the transport block provided in the embodiment of the present application is configured to perform the method in any of the embodiments described above, so that the same effect as that of the method in the embodiment described above can be achieved.

The entity device corresponding to the receiving unit may be a receiver, the entity device corresponding to the sending unit may be a transmitter, and the entity device corresponding to the processing unit may be a processor.

Fig. 14 shows a possible example of the composition of the apparatus for determining a transport block size, which is described above and in the embodiments, in the case of dividing each functional module by corresponding functions, where the apparatus for determining a transport block size can perform the steps performed by the network device in any of the method embodiments of the present application. As shown in fig. 14, the apparatus for determining a transport block size is a network device or an apparatus for determining a transport block size that supports the method provided in the embodiment implemented by the network device, for example, the apparatus for determining a transport block size may be a system on a chip. The apparatus for determining a transport block size may include: a processing unit 1401, a transmitting unit 1402, and a receiving unit 1403.

For uplink signal transmission, wherein the receiving unit 1403 is configured to support the apparatus for determining the size of the transport block to perform the method described in the embodiment of the present application. For example, the receiving unit 1403 is used for receiving data, for example, for enabling the apparatus for determining the transport block size to perform S503 in the method for determining the transport block size shown in fig. 5, or S1003 in the method for determining the transport block size shown in fig. 10.

A processing unit 1401 for executing or for supporting the means for determining the transport block size to execute S504 and S505 in the method for determining the transport block size shown in fig. 5, and S1004 and S1005 in the method for determining the transport block size shown in fig. 10.

For downlink signal transmission, the processing unit 1401 is configured to support the apparatus for determining the transport block size to perform the method described in the embodiments of the present application. For example, the processing unit 1401 is configured to execute or support the apparatus for determining the transport block size to execute S501 in the method for determining the transport block size shown in fig. 5 or S1001 in the method for determining the transport block size shown in fig. 10.

A sending unit 1402 for sending data, e.g. for enabling the apparatus for determining the transport block size to perform S502 in the method for determining the transport block size shown in fig. 5, S1002 in the method for determining the transport block size shown in fig. 10.

Fig. 15 shows a schematic diagram of a possible structure of the network device involved in the above embodiments.

The network device includes a transmitter/receiver 1501, a controller/processor 1502, and a memory 1503. The transmitter/receiver 1501 is used to support the transceiving of information between the network device and the terminal device as described in the above embodiments. The controller/processor 1502 performs various functions for communicating with terminal devices. In the uplink, uplink signals from the terminal device are received via the antenna, conditioned by the receiver 1501, and further processed by the controller/processor 1152 to recover traffic data and signaling information sent by the terminal device. On the downlink, traffic data and signaling messages are processed by controller/processor 1502 and conditioned by transmitter 1501 to generate a downlink signal, which is transmitted via the antenna to the terminal devices. The controller/processor 1502 also performs the processes described in fig. 5 and 10 with respect to the network device and/or other processes for the techniques described herein. A memory 1503 is used to store program codes and data for the network devices.

Fig. 16 shows a simplified schematic diagram of a possible design structure of the terminal device involved in the above-described embodiment. The terminal device includes a transmitter 1601, a receiver 1602, a controller/processor 1603, a memory 1604, and a modem processor 1605.

The transmitter 1601 is configured to transmit an uplink signal (data carried on a symbol corresponding to the first time unit is repeatedly transmitted S times), and the uplink signal is transmitted to the network device via the antenna as described in the above embodiments. On the downlink, the antenna receives the downlink signal transmitted by the network device in the above embodiment (repeatedly transmits data carried on the symbol corresponding to the first time unit S times). The receiver 1602 is configured to receive a downlink signal (S times carrying data on a symbol corresponding to a first time unit) received from an antenna. In modem processor 1605, an encoder 1606 receives and processes traffic data and signaling messages to be transmitted on the uplink. A modulator 1607 further processes (e.g., symbol maps and modulates) the coded traffic data and signaling messages and provides output samples. A demodulator 1609 processes (e.g., demodulates) the input samples and provides symbol estimates. A decoder 1608 processes (e.g., decodes) the symbol estimates and provides decoded data and signaling messages for transmission to the terminal device. The encoder 1606, modulator 1607, demodulator 1609, and decoder 1608 may be implemented by a combined modem processor 1605. These elements are processed according to the radio access technology employed by the radio access network.

The controller/processor 1603 controls and manages the operation of the terminal device for executing the processing performed by the terminal device in the above-described embodiment. For example, the TBS is determined according to the number of REs included in the M first time units and the modulation and coding scheme, and the data on the symbol corresponding to the first time unit is decoded according to the TBS and/or other processes of the techniques described in this application. As an example, the controller/processor 1603 is configured to support the terminal device to perform the process S501 in fig. 5 and the process S1001 in fig. 10.

In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a terminal, or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium (e.g., SSD), among others.

In the process of determining the TBS in the foregoing embodiments, if the TBS is determined according to K transmission occasions (transmission occasions), time-frequency resources occupied by the K transmission occasions, and a modulation and coding scheme indicated by the network device, and the TB corresponding to the determined TBS is carried on the time-frequency resources occupied by one transmission occasion for transmission, a transmission code rate can be obtained. The transmission code rate can also be understood as the number of bits when the TB corresponding to the TBS is carried on the time-frequency resource occupied by one transmission opportunity for transmission. The code rate threshold may be the maximum bit number that can be carried by the time-frequency resource occupied by one transmission opportunity. The transmission code rate may be greater than a code rate threshold. For example, assuming that the code rate threshold is 1, the maximum data packet that can be carried by the time-frequency resource occupied by one transmission opportunity is 100 bits. If the transmission code rate is 1.2 and a 120-bit data packet needs to be transmitted, the 120-bit data packet cannot be completely transmitted by the time-frequency resource occupied by one transmission opportunity, and incomplete transmission of the data packet can cause decoding failure at a receiving end and needs one retransmission, so that the transmission efficiency is reduced, and the transmission delay is increased.

In this case, the TBS needs to be recalculated, so that the reference code rate of the TB corresponding to the TBS when the TB is carried on the time-frequency resource occupied by one transmission opportunity and transmitted is less than or equal to the code rate threshold. In addition, in the following, a transmission occasion may be understood as a time unit, which may be one or more OFDM symbols. The time unit may also refer to a transmission opportunity or a mini timeslot, and for a specific explanation, reference may be made to the explanation in the foregoing embodiment, which is not described herein again. In the embodiment of the present application, it is assumed that the first time unit is a mini-slot. The time domain resources required for the repeated transmission of data on a mini-slot basis are within one slot. The following describes the method for re-determining the size of the transport block in detail by taking uplink signal transmission as an example.

In a first implementation, if the reference code rate is greater than the code rate threshold, the reference code rate may be overcome by adjusting the number of mini-slots used to calculate the TBS. Fig. 17 is a flowchart of a method for determining a size of a transport block according to an embodiment of the present application. As shown in fig. 17, the method may include:

s1701, the terminal device determines a first TBS and a reference code rate according to the number of REs included in the K mini-slots, the first code rate, and the first modulation order.

First, the terminal device determines a first TBS according to the number of REs included in the K mini slots and a first modulation and coding scheme. Wherein K mini slots may also be understood as K transmission occasions. K is an integer greater than or equal to 2, and K represents the number of times of repeatedly transmitting data carried on a symbol corresponding to the mini-slot by pre-configuration or DCI dynamic indication. For example, the network device may dynamically indicate or repeat the number K configured by the higher layer parameter through the DCI, and the PUSCH may repeat transmission on the time-frequency resource corresponding to the K transmission occasions. "K represents pre-configuration or DCI dynamically indicates the number of times of repeatedly transmitting data carried on a symbol corresponding to a mini-slot" may also be described as K represents the number of times of repeatedly transmitting data carried on a symbol corresponding to a mini-slot, which is notified by the network device. The first modulation coding scheme may be indicated by the network device. The first modulation coding scheme may be used to indicate a first code rate and a first modulation order. For example, the first modulation and coding scheme may be MCS index 9. As shown in table 3, the MCS index 9 indicates a modulation order of 2, i.e., the first modulation order is 2, and the MCS index 9 indicates a code rate of 251/1024, i.e., the first code rate is 251/1024.

TABLE 3

For example, the TBS may be determined using the following equation eight: n is a radical of_TBS＝cd*K*N_RE*Q_mWherein N is_TBSRepresenting the value of TBS, cd the code rate, e.g. first code rate, N_REIndicating the number of REs, or N, included in a mini-slot_REFor indicating the number of REs, Q, included in a mini-slot for transmitting data or control information_mRepresenting a modulation order, e.g., a first modulation order.

Then, if the terminal device will be N_TBSWhen the corresponding TB is carried on one mini timeslot for transmission, the time frequency resource occupied by the corresponding transmission of 1 time is 1/K of the time frequency resource occupied by the transmission of K times. If the first modulation order is guaranteed to be unchanged, formula eight can be summarized as:

it follows that the reference code rate may be K times the first code rate. However, when the TB corresponding to the first TBS is transmitted using one mini-slot, the reference code rate may be greater than the code rate threshold. Assuming that the first code rate is 251/1024, and K is 4, that is, the time-frequency resource occupied by 1 transmission is 1/4 of the time-frequency resource occupied by 4 transmissions, the reference code rate may be (251 × 4)/1024 — 1004/1024. The code rate threshold may be the maximum value in the MCS table of the existing protocol (3GPP TS 38.214v15.3.0, section 6.1.4.1). E.g., target code rate 772/1024 indicated by MCS index 27 in the MCS table. 1004/1024 is greater than 772/1024, i.e. the reference code rate is greater than the code rate threshold.

Optionally, the code rate threshold may also be a predefined or preconfigured code rate. E.g. 0.95, 1, 1.33, 1.67. By "predefined" it may be meant pre-written into the device according to a protocol. By "pre-configured" it may be meant that the network device indicates in advance.

If the reference code rate is greater than the code rate threshold, the TBS is recalculated, the TBS is calculated by using resources of M transmission opportunities instead of resources of K transmission opportunities, M is less than K, and the code rate corresponding to the first TBS acting on one mini-slot determined according to M is less than or equal to the code rate threshold. M is the largest positive integer satisfying that the reference code rate is not greater than the code rate threshold. The "reference code rate" may be understood as a code rate when the TB corresponding to the first TBS is carried on a time-frequency resource occupied by one mini-slot for transmission. S1702 is performed.

S1702, the terminal device determines M according to the code rate threshold.

For example, formula nine may be employed to determine N'_TBS：N′_TBS＝cd*M*N_RE*Q_mWherein, N'_TBSAnd the value of the TBS determined according to the RE number, the first code rate and the first modulation order included in the M mini time slots is represented. N'_TBSWhen the corresponding TB is carried on one mini timeslot, the time frequency resource occupied by the corresponding transmission of 1 time is 1/M of the time frequency resource occupied by the transmission of M times. cd denotes the code rate, e.g. first code rate, N_REIndicating the number of REs, or N, included in a mini-slot_REFor indicating the number of REs, Q, included in a mini-slot for transmitting data or control information_mRepresenting a modulation order, e.g., a first modulation order. If the first modulation order is guaranteed to be unchanged, the formula nine can be summarized as follows:

wherein M should satisfy the condition of

Wherein cd_maxRepresenting the code rate threshold. Therefore, the reference code rate is not greater than the code rate threshold.

For example, assuming that the number of transmission occasions K is 4, the first code rate is 251/1024, the first modulation order is 2, two RBs are used for transmission, each RB is 12 subcarriers, each transmission occasion is 2 symbols, and the code rate threshold is 772/1024, then the calculated TBS is:

N_TBS＝cd*K*N_RE*Q_m＝251/1024*4*(12*2*2)*2

will N_TBSIf the corresponding TB is carried and transmitted on an RE of one transmission opportunity, the reference code rate is,

if the code rate threshold is exceeded 772/1024, the TBS needs to be determined again, and the following conditions should be satisfied:

the value of M is 3.

Alternatively, the code rate threshold is a predefined or preconfigured code rate. For example, the code rate threshold is 0.95.

The value of M is 3.

Optionally, M may also be predefined, preconfigured, or dynamically indicated by DCI, without the terminal device calculating the value of M.

Optionally, if the K mini timeslots are equal in length, the TBS may also be calculated by using the time frequency resource occupied by one mini timeslot instead of the total time frequency resource occupied by all mini timeslots. For example, the code rate threshold is preset to 772/1024, the MCS index is 13, the first code rate is 526/1024, the first modulation order is 2, K is 2, the time domain length of one mini-slot is 2 symbols, and the frequency domain Resource is a Physical Resource Block (PRB). TBS calculated from 2 mini-slots is:

N_TBS＝cd*K*N_RE*Q_m＝526/1024*2*(12*2*2)*2

therefore, the reference code rate is 1052/1024, and the TBS is recalculated if the reference code rate is greater than the code rate threshold. Calculating the TBS by using the time frequency resource occupied by one mini time slot instead of the total time frequency resource occupied by all mini time slots:

N_TBS＝cd*K*N_RE*Q_m＝526/1024*2*(12*2)*2

s1703, the terminal device determines a second TBS according to the number of REs included in the M mini slots, the first code rate, and the first adjustment order.

Specifically, the method can comprise the following steps:

first, the number of REs included in the M mini-slots is determined. Specifically, using the formula six

The number of REs included in the M mini-slots is determined. Wherein N is_RE"represents the number of REs included in the M mini-slots;

a time domain unit may also be referred to as a time unit,

denotes the number of symbols occupied by all PUSCH or PDSCH repeated within M mini-slots, e.g., one mini-slot includes 2 symbols, M-4,

wherein the content of the first and second substances,

the representation is composed of a higher layer parameter PUSCH-seOverhead for xOverhead parameter configuration in rvingcellconfig.

Second, the number of REs used to calculate the TBS is determined according to the number of REs included in the M mini-slots. Specifically, by the formula seven N_RE＝min(156,N_RE″)·n_PRBObtaining the number of REs used to calculate TBS, where N_REDenotes the number of REs, n, used to calculate TBS_PRBIndicates the number of PRBs.

A quantized intermediate value of the information bit is calculated, wherein,

looking up the table in the protocol to obtain N or more_i'_nfoThe most recent value is used as TBS; or, if N is_info3824 by the formula five

A quantized intermediate value of the information bit is calculated, wherein,

if the code rate R is less than or equal to 1/4,

wherein the content of the first and second substances,

if not, then,

wherein the content of the first and second substances,

c denotes the number of coded blocks.

S1704, the terminal device repeatedly sends data carried on the symbol corresponding to the mini timeslot S times according to the second TBS.

S is an integer, S is greater than or equal to 1 and less than or equal to K.

S1705, the network device receives S times of data carried on the symbol corresponding to the mini timeslot.

After the network device receives S times of data carried on symbols corresponding to the mini-slots, a reference code rate may be determined according to the number of REs included in the K mini-slots, the first code rate, and the first modulation order, for a specific explanation, reference may be made to detailed description of S1701, and details of the embodiment of the present application are not described herein again. If the reference code rate is greater than the code rate threshold, then M is determined according to the code rate threshold, and for the specific explanation, reference may be made to the detailed explanation of S1702, which is not described herein again in this embodiment of the present application.

S1706, the network device determines the second TBS according to the number of REs included in the M mini-slots, the first code rate, and the first modulation order.

The specific determination of the second TBS can refer to the explanations in the prior art, and the embodiments of the present application are not described herein.

S1707, the network device decodes data on a symbol corresponding to the mini slot according to the second TBS.

In a second implementation, if the reference code rate is greater than the code rate threshold, the TBS may be determined by using a scaling factor to overcome that the reference code rate is greater than the code rate threshold. Fig. 18 is a flowchart of a fourth method for determining a size of a transport block according to an embodiment of the present application. As shown in fig. 18, the method may include:

s1801, the terminal device determines the first TBS according to the number of REs included in the M mini timeslots, the first code rate, and the first adjustment order.

First, the terminal device determines a second TBS and a reference code rate according to the number of REs, the first code rate, and the first modulation order included in the K first time units, where the reference code rate is a code rate corresponding to the second TBS acting on one mini-slot. Wherein M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, K represents a number of times for which data carried on a symbol corresponding to the mini slot is repeatedly transmitted, and M is equal to K. For example, the network device may dynamically indicate or repeat the number K configured by the higher layer parameter through the DCI, and the PUSCH may repeat transmission on the time-frequency resource corresponding to the K transmission occasions. The first modulation coding scheme may be indicated by the network device. The first modulation coding scheme may be used to indicate a first code rate and a first modulation order. For example, the first modulation and coding scheme may be MCS index 9. As shown in table 3, the MCS index 9 indicates a modulation order of 2, i.e., the first modulation order is 2, and the MCS index 9 indicates a code rate of 251/1024, i.e., the first code rate is 251/1024. For example, the TBS may be determined using the following equation eight: n is a radical of_TBS＝cd*K*N_RE*Q_mWherein N is_TBSRepresenting the value of TBS, cd the code rate, e.g. first code rate, N_REIndicating the number of REs, Q, included in a mini-slot_mRepresenting a modulation order, e.g., a first modulation order.

For a specific explanation of determining the reference code rate, reference may be made to the detailed description of S1701, and details of the embodiments of the present application are not repeated herein.

If the reference code rate is greater than the code rate threshold, a first TBS may be determined based on the scaling factor, the first TBS being less than a second TBS. The scaling factor is greater than 0 and less than 1, and a code rate corresponding to the first TBS acting on one mini-slot is less than or equal to a code rate threshold. The scaling factor may be a higher layer parameter or DCI indicated.

For the explanation of the corresponding rate threshold, reference may be made to the above explanation, and details of the embodiment of the present application are not described herein again.

S1802, the terminal device repeatedly sends data carried on symbols corresponding to the mini-slots S times according to the first TBS.

S1803, the network device receives data carried on the symbol corresponding to the mini timeslot S times.

S1804, the network device determines the first TBS according to the number of REs included in the M mini-slots, the first code rate, and the first modulation order.

After receiving S times of data carried on a symbol corresponding to the mini timeslot, the network device determines a reference code rate according to the number of REs included in the K first time units, the first code rate, and the first adjustment order, and for specific explanation, reference may be made to detailed description of S1801, which is not described herein again in this embodiment of the present application. If the reference code rate is greater than the code rate threshold, executing S1805.

S1805, the network device decodes data on a symbol corresponding to the mini slot according to the first TBS.

It should be noted that, when the uplink data transmission or the transmission of the control information is based on scheduling, the scaling factor may be dynamically indicated by the DCI. When the transmission of uplink data or control information is schedule-free, the scaling factor may be configured by a higher layer parameter, or indicated by an activation DCI (activation DCI). For example, the rate threshold is preset to 772/1024. If the network device indicates that the scaling factor is 0.7, the MCS index is 13, and K is 2, the reference code rate when the TBS is loaded in one mini-slot according to the 2 mini-slots is 1052/1024, and the reference code rate is greater than the code rate threshold, the TBS needs to be adjusted according to the scaling factor 0.7, where the adjusted code rate is 0.72 and 0.72 is less than the code rate threshold. In addition, if the reference code rate does not exceed the code rate threshold when the primary calculated TBS is transmitted by being carried on the time-frequency resource of one mini-slot, the scale factor does not need to be considered, or the terminal device considers that the scale factor is 1. If the scale factor is larger than 0.5 and the adjusted code rate is still larger than the code rate threshold, the TBS is recalculated, and the TBS is calculated by using the time-frequency resource occupied by one mini time slot instead of the total time-frequency resource occupied by all the mini time slots.

In a third implementation, if the reference code rate is greater than the code rate threshold, the first TBS may be determined according to a preconfigured code rate, where the preconfigured code rate is less than or equal to the code rate threshold, and the reference code rate is overcome and is greater than the code rate threshold. Fig. 19 is a flowchart of a method for determining a size of a transport block according to an embodiment of the present application. As shown in fig. 19, the method may include:

s1901, the terminal device determines the first TBS and the reference code rate according to the number of REs included in the M mini-slots, the first code rate, and the first modulation order.

For specific explanation, reference may be made to the detailed description of S1701, and the embodiments of the present application are not described herein again.

If the reference code rate is greater than the code rate threshold, S1902 is performed.

S1902, the terminal device determines a second TBS according to the number of REs included in the M mini-slots, the second code rate, and the second modulation order.

For specific explanation, reference may be made to the detailed description of S1703, and the embodiments of the present application are not described herein again.

It should be noted that the second code rate used for determining the second TBS is a code rate threshold, and the code rate corresponding to the second TBS acting on one first time unit is smaller than or equal to the code rate threshold. The second code rate is predefined or preconfigured. The second modulation order may be looked up from the MCS table according to the second code rate.

For example, assuming that the code rate threshold is 772/1024, the second code rate is 1, K is 2, the MCS index is 13, the first modulation order is 2, and the first code rate is 526/1024, the first TBS is determined according to the number of REs included in 2 mini-slots, the first code rate, and the first adjustment order, the bit number represented by the first TBS is loaded on the time-frequency resource occupied by one mini-slot for transmission, the reference code rate is 1052/1024, and the reference code rate is greater than the code rate threshold, and the second TBS is determined according to the second code rate 943/1024.

S1903, the terminal device repeatedly sends data carried on the symbol corresponding to the mini timeslot S times according to the second TBS.

S1904, the network device receives the data carried on the symbol corresponding to the mini timeslot S times.

After receiving S times of data carried on the symbol corresponding to the mini timeslot, the network device determines a reference code rate according to the number of REs included in the K first time units, the first code rate, and the first adjustment order, and for specific explanation, reference may be made to detailed description of S1901, which is not described herein again in this embodiment of the present application. If the reference code rate is greater than the code rate threshold, execute S1905.

S1905, the network device determines the second TBS according to the number of REs included in the M mini-slots, the second code rate, and the second modulation order.

S1906, the network device decodes data on a symbol corresponding to the mini slot according to the second TBS.

In a fourth implementation manner, when the terminal device determines the first TBS according to the number of REs included in the M mini-slots, the first code rate, and the first modulation order, the used M may be pre-configured, predefined, or indicated by DCI, and the code rate corresponding to the first TBS determined according to M acting on one first time unit is less than or equal to a code rate threshold.

Optionally, if the mini-slots are not equal in length, the mini-slot used for calculating whether the TBS exceeds the code rate threshold may beBeing the shortest of the K mini-slots. For example, the number of repetitions K dynamically indicated or preconfigured by the network device is 3, the time domain length of each mini-slot is 2 symbols, 5 symbols, and 7 symbols, respectively, the MCS index dynamically indicated by the network device is 13, the modulation order corresponding to the MCS index 13 is 2, the code rate is 526/1024, and when the calculated TBS is used, N is N_REMay be a time-frequency resource determined according to the (2+5+7) symbol. Will N_TBSThe expressed coded bit number is loaded in one mini time slot for transmission, and the corresponding equivalent code rates are different because the three mini time slots are not equal in length. N is a radical of_TBSTransmitted on a mini-slot of 2 symbols with a reference code rate of

The network device pre-configures or indicates a code rate threshold of 943/1024, 3682/1024 is greater than 943/1024, so the TBS is back-off.

Or, if the transmission opportunities are not equal, the mini-slot used for calculating whether the TBS exceeds the code rate threshold may also be the longest one of the K mini-slots.

For downlink signal transmission, the sending device is a network device, the corresponding receiving device is a terminal device, and the TBS repeatedly sends data carried on a symbol corresponding to the first time unit S times as downlink data. For the process of determining the size of the transmission block in the downlink signal transmission process, the execution main bodies in fig. 17 to 19 may be interchanged, and for the detailed explanation, reference may be made to the method steps shown in fig. 17 to 19, which is not described herein again in this embodiment of the present application.

Fig. 20 shows a possible example of the composition of the apparatus for determining the size of a transport block mentioned above and in the embodiments, in the case of dividing each functional module by corresponding functions, which is capable of performing the steps performed by the terminal device in any of the method embodiments of the present application. As shown in fig. 20, the apparatus for determining a transport block size is an apparatus for determining a transport block size, which is a terminal device or a device supporting the terminal device to implement the method provided in the embodiment, for example, the apparatus for determining a transport block size may be a chip system. The apparatus for determining a transport block size may include: a processing unit 2001, a transmitting unit 2002, and a receiving unit 2003.

For uplink signal transmission, the processing unit 2001, a device for supporting determination of the transport block size, executes the method described in the embodiments of the present application. For example, the processing unit 2001 is configured to execute or support the apparatus for determining the transport block size to execute S1701 to S1703 in the method for determining the transport block size shown in fig. 17, S1801 in the method for determining the transport block size shown in fig. 18, and S1901 to 1902 in the method for determining the transport block size shown in fig. 18.

A transmitting unit 2002 for transmitting data, for example, for enabling the apparatus for determining the transport block size to perform S1704 in the method for determining the transport block size shown in fig. 17, S1802 in the method for determining the transport block size shown in fig. 18, or S1903 in the method for determining the transport block size shown in fig. 19.

For downlink signal transmission, wherein the receiving unit 2003 is configured to support the apparatus for determining the transport block size to perform the method described in the embodiments of the present application. For example, the receiving unit 2003 is configured to receive data, for example, to support the apparatus for determining the transport block size to perform S1705 in the method for determining the transport block size shown in fig. 17, S1803 in the method for determining the transport block size shown in fig. 18, and S1904 in the method for determining the transport block size shown in fig. 19.

The processing unit 2001 is configured to execute or support the apparatus for determining the transport block size to execute S1706 and S1707 in the method for determining the transport block size shown in fig. 17, S1804 and S1805 in the method for determining the transport block size shown in fig. 18, and S1905 to S1906 in the method for determining the transport block size shown in fig. 19.

Fig. 21 shows a possible example of the composition of the apparatus for determining a transport block size, which is described above and in the embodiments, in the case of dividing each functional module by corresponding functions, and is capable of executing the steps executed by the network device in any of the method embodiments of the present application. As shown in fig. 21, the apparatus for determining a transport block size is a network device or an apparatus for determining a transport block size that supports the method provided in the embodiment implemented by the network device, for example, the apparatus for determining a transport block size may be a system on a chip. The apparatus for determining a transport block size may include: a processing unit 2101, a transmitting unit 2102 and a receiving unit 2103.

For uplink signal transmission, the receiving unit 2103 is configured to support the apparatus for determining the size of the transport block to perform the method described in the embodiments of the present application. For example, the receiving unit 2103 is configured to receive data, for example, to support the apparatus for determining the transport block size to perform S1705 in the method for determining the transport block size shown in fig. 17, S1803 in the method for determining the transport block size shown in fig. 18, and S1904 in the method for determining the transport block size shown in fig. 19.

The processing unit 2101 is configured to execute or support the apparatus for determining a transport block size to execute S1706 and S1707 in the method for determining a transport block size shown in fig. 17, S1804 and S1805 in the method for determining a transport block size shown in fig. 18, or S1905 and S1906 in the method for determining a transport block size shown in fig. 19.

For downlink signal transmission, the processing unit 2101 is configured to support the apparatus for determining the transport block size to perform the method described in the embodiments of the present application. For example, the processing unit 2101 is configured to execute or support the apparatus for determining the transport block size to execute S1701 to S1703 in the method for determining the transport block size shown in fig. 17, S1801 in the method for determining the transport block size shown in fig. 18, and S1901 and S1902 in the method for determining the transport block size shown in fig. 19.

A transmitting unit 2102 configured to transmit data, for example, to enable the apparatus for determining a transport block size to execute S1704 in the method for determining a transport block size shown in fig. 17, S1802 in the method for determining a transport block size shown in fig. 18, or S1903 in the method for determining a transport block size shown in fig. 19.

Fig. 22 shows a schematic diagram of a possible structure of the network device involved in the above embodiment.

The network device includes a transmitter/receiver 2201, a controller/processor 2202, and a memory 2203. The transmitter/receiver 2201 is used for supporting the information transceiving between the network device and the terminal device in the above-mentioned embodiments. The controller/processor 2202 performs various functions for communicating with the terminal devices. In the uplink, uplink signals from the terminal device are received via the antenna, conditioned by the receiver 2201, and further processed by the controller/processor 2202 to recover traffic data and signaling information sent by the terminal device. On the downlink, traffic data and signaling messages are processed by a controller/processor 2202 and conditioned by a transmitter 2201 to generate a downlink signal, which is transmitted via an antenna to a terminal device. The controller/processor 2202 also performs the processes of fig. 17 and 19 involving network devices and/or other processes for the techniques described herein. The memory 2203 is used to store program codes and data of the network device.

Fig. 23 shows a simplified schematic diagram of a possible design structure of the terminal device involved in the above-described embodiment. The terminal device includes a transmitter 2301, a receiver 2302, a controller/processor 2303, a memory 2304 and a modem processor 2305.

The transmitter 2301 is configured to transmit an uplink signal (data carried on a symbol corresponding to the first time unit is repeatedly transmitted S times), which is transmitted to the network device in the above-described embodiment via the antenna. On the downlink, the antenna receives the downlink signal transmitted by the network device in the above embodiment (repeatedly transmits data carried on the symbol corresponding to the first time unit S times). The receiver 2302 is configured to receive a downlink signal (data carried on a symbol corresponding to a first time unit S times) received from an antenna. In modem processor 2305, an encoder 2306 receives traffic data and signaling messages to be sent on the uplink and processes the traffic data and signaling messages. A modulator 2307 further processes (e.g., symbol maps and modulates) the coded traffic data and signaling messages and provides output samples. A demodulator 2309 processes (e.g., demodulates) the input samples and provides symbol estimates. A decoder 2308 processes (e.g., decodes) the symbol estimates and provides decoded data and signaling messages that are sent to the terminal devices. The encoder 2306, modulator 2307, demodulator 2309, and decoder 2308 may be implemented by a combined modem processor 2305. These elements are processed according to the radio access technology employed by the radio access network.

The controller/processor 2303 controls and manages the operation of the terminal device, and is configured to execute the processing performed by the terminal device in the above-described embodiment. For example, the TBS is determined according to the number of REs included in the M first time units and the modulation and coding scheme, and the data on the symbol corresponding to the first time unit is decoded according to the TBS and/or other processes of the techniques described in this application. The controller/processor 2303 is configured to support the terminal device to execute, as an example, processes S1701 to S1703 in fig. 17, process S1801 in fig. 18, and process S1901 in fig. 19.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of determining a transport block size, TBS, comprising:

receiving data carried on a symbol corresponding to a first time unit S times, wherein S is an integer, S is greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K represents the number of times of pre-configuration and repeated sending of the data carried on the symbol corresponding to the first time unit;

determining TBS according to the number of Resource Elements (RE) included in M first time units and a modulation coding mode, wherein M is an integer greater than or equal to 1 and less than or equal to K;

decoding data on a symbol corresponding to the first time unit according to the TBS;

and M is equal to K, the first transmission opportunity in K is t, the first transmission opportunity is the opportunity of sending data borne on the symbol corresponding to the first time unit for the first time, wherein t is a positive integer which is greater than or equal to 1 and less than or equal to K.

2. The method of claim 1, wherein S-K-t +1 represents a number of times data carried on a symbol corresponding to the first time unit is repeatedly transmitted in a second time unit.

3. The method of claim 1, wherein S-K represents a number of times data carried on a symbol corresponding to the first time unit is repeatedly transmitted in a second time unit.

4. The method of claim 1, wherein after determining the TBS according to the number of REs included in the M first time units and the modulation and coding scheme, M is 1, and the method comprises:

if the symbols corresponding to the P first time units bear a demodulation reference signal DMRS, adjusting the TBS according to a first scale factor to obtain a first adjusted TBS, wherein the first scale factor is greater than 1, P is an integer, and P is greater than or equal to 1 and less than K.

5. The method of claim 1, wherein M is 1, and further comprising, after determining the TBS according to the number of REs included in the M first time units and the modulation and coding scheme:

and if all the symbols corresponding to the first time unit are used for bearing a Physical Uplink Shared Channel (PUSCH) or a Physical Downlink Shared Channel (PDSCH), adjusting the TBS according to a second scale factor to obtain a second adjusted TBS, wherein the second scale factor is smaller than 1.

6. The method of any of claims 1-5, wherein the first time unit is a mini-slot and the second time unit is a slot.

7. The method of determining a transport block size according to any of claims 1-5, wherein the value of K is predefined or dynamically indicated by Downlink control information, DCI.

8. A method of determining a transport block size, TBS, comprising:

determining a TBS according to the number of Resource Elements (REs) included in M first time units and a modulation coding scheme, where M is an integer greater than or equal to 1 and less than or equal to K, where K is an integer greater than or equal to 2, and K represents the number of times for pre-configuring to repeatedly send data carried on a symbol corresponding to the first time unit;

repeatedly sending data carried on the symbol corresponding to the first time unit for S times according to the TBS, wherein S is an integer and is greater than or equal to 1 and less than or equal to K;

9. The method of claim 8, wherein S-K-t +1 represents a number of times data carried on a symbol corresponding to the first time unit is repeatedly transmitted in a second time unit.

10. The method of claim 8, wherein S-K represents a number of times data carried on a symbol corresponding to the first time unit is repeatedly transmitted in a second time unit.

11. The method of claim 8, wherein after determining the TBS according to the number of REs included in the M first time units and the modulation and coding scheme, M is 1, and the method comprises:

12. The method of claim 8, wherein M is 1, and further comprising, after determining the TBS according to the number of REs included in the M first time units and the modulation and coding scheme:

13. The method of any of claims 8-12, wherein the first time unit is a mini-slot and the second time unit is a slot.

14. The method of determining a transport block size according to any of claims 8-12, wherein the value of K is predefined or dynamically indicated by downlink control information, DCI.

15. An apparatus for determining a transport block size, TBS, comprising:

a receiving unit, configured to receive data carried on a symbol corresponding to a first time unit S times, where S is an integer, S is greater than or equal to 1 and is less than or equal to K, K is an integer greater than or equal to 2, and K represents a number of times for pre-configuring and repeatedly sending data carried on a symbol corresponding to the first time unit;

a processing unit, configured to determine a TBS according to a number of Resource Elements (REs) included in M first time units and a modulation and coding scheme, and decode data on a symbol corresponding to the first time unit received by the receiving unit according to the TBS, where M is an integer greater than or equal to 1 and less than or equal to K;

16. The apparatus of claim 15, wherein S-K-t +1 represents a number of times data carried on a symbol corresponding to the first time unit is repeatedly transmitted in a second time unit.

17. The apparatus of claim 15, wherein S-K represents a number of times data carried on a symbol corresponding to the first time unit is repeatedly transmitted in a second time unit.

18. The apparatus of claim 15, wherein the processing unit is further configured to, when M is 1, if P symbols corresponding to the first time unit carry demodulation reference signals DMRS, adjust the TBS according to a first scaling factor to obtain a first adjusted TBS, where P is an integer and is greater than or equal to 1 and less than K.

19. The apparatus of claim 15, wherein the processing unit is further configured to, when M is 1, adjust the TBS according to a second scaling factor to obtain a second adjusted TBS if all symbols corresponding to the first time unit are used for carrying a Physical Uplink Shared Channel (PUSCH) or a Physical Downlink Shared Channel (PDSCH), and the second scaling factor is smaller than 1.

20. The apparatus of any of claims 15-19, wherein the first time unit is a mini-slot and the second time unit is a slot.

21. The apparatus for determining a transport block size according to any of claims 15-19, wherein the value of K is predefined or dynamically indicated by downlink control information, DCI.

22. An apparatus for determining a transport block size, TBS, comprising:

a processing unit, configured to determine a TBS according to a number of Resource Elements (REs) included in M first time units and a modulation and coding scheme, where M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K represents a number of times for pre-configuring to repeatedly send data carried on a symbol corresponding to the first time unit;

a sending unit, configured to repeatedly send data carried on the symbol corresponding to the first time unit S times according to the TBS determined by the processing unit, where S is an integer and is greater than or equal to 1 and less than or equal to K;

23. The apparatus of claim 22, wherein S-K-t +1 represents a number of times data carried on a symbol corresponding to the first time unit is repeatedly transmitted in a second time unit.

24. The apparatus of claim 22, wherein S-K represents a number of times data carried on a symbol corresponding to the first time unit is repeatedly transmitted in a second time unit.

25. The apparatus of claim 22, wherein the processing unit is further configured to, when M is 1, if P symbols corresponding to the first time unit carry demodulation reference signals DMRS, adjust the TBS according to a first scaling factor to obtain a first adjusted TBS, where P is an integer and is greater than or equal to 1 and less than K.

26. The apparatus of claim 22, wherein the processing unit is further configured to, when M is 1, adjust the TBS according to a second scaling factor to obtain a second adjusted TBS if all symbols corresponding to the first time unit are used for carrying a Physical Uplink Shared Channel (PUSCH) or a Physical Downlink Shared Channel (PDSCH), and the second scaling factor is smaller than 1.

27. The apparatus of any of claims 22-26, wherein the first time unit is a mini-slot and the second time unit is a slot.

28. The apparatus for determining a transport block size according to any of claims 22-26, wherein the value of K is predefined or dynamically indicated by downlink control information, DCI.

29. A method of determining a transport block size, TBS, comprising:

when the time length of the K first time units is greater than that of one second time unit, determining the TBS according to the resource element RE number corresponding to the reference time length and the modulation coding mode;

wherein the reference duration is equal to a duration of the second time unit; or the reference duration is equal to the durations of R first time units, wherein R is the largest integer smaller than K, and the reference duration is smaller than the duration of the second time unit;

and the first transmission opportunity in the K is t, the first transmission opportunity is the opportunity for sending the data carried on the symbol corresponding to the first time unit for the first time, wherein the t is a positive integer which is greater than or equal to 1 and less than or equal to the K.

30. The method of claim 29, wherein the first time unit is a mini-slot and the second time unit is a slot.

31. The method of claim 29, wherein the value of K is predefined or dynamically indicated by downlink control information, DCI.

32. A method of determining a transport block size, TBS, comprising:

when the time length of K first time units is greater than the time length of one second time unit, determining TBS according to the number of Resource Elements (RE) corresponding to a reference time length and a modulation coding mode, wherein K is an integer greater than or equal to 2 and represents the number of times of pre-configuring and repeatedly sending data carried on a symbol corresponding to the first time unit;

33. The method of claim 32, wherein the first time unit is a mini-slot and the second time unit is a slot.

34. The method of claim 32, wherein the value of K is predefined or dynamically indicated by downlink control information, DCI.

35. An apparatus for determining a transport block size, TBS, comprising:

a processing unit, configured to determine, when the durations of K first time units are greater than the duration of one second time unit, a TBS according to the number of Resource Elements (REs) corresponding to a reference duration and a modulation and coding scheme, and decode, according to the TBS, data on a symbol corresponding to the first time unit received by the receiving unit, where the reference duration is equal to the duration of the second time unit; or the reference duration is equal to the durations of R first time units, wherein R is the largest integer smaller than K, and the reference duration is smaller than the duration of the second time unit;

36. The apparatus of claim 35, wherein the first time unit is a mini-slot and the second time unit is a slot.

37. The apparatus for determining a transport block size according to claim 35, wherein the value of K is predefined or dynamically indicated by downlink control information, DCI.

38. An apparatus for determining a transport block size, TBS, comprising:

a processing unit, configured to determine, when the durations of K first time units are greater than the duration of one second time unit, a TBS according to the number of Resource Elements (REs) corresponding to a reference duration and a modulation and coding scheme, where K is an integer greater than or equal to 2, and represents the number of times for pre-configuring to repeatedly send data carried on a symbol corresponding to the first time unit;

39. The apparatus of claim 38, wherein the first time unit is a mini-slot and the second time unit is a slot.

40. The apparatus for determining a transport block size according to claim 38, wherein the value of K is predefined or dynamically indicated by downlink control information, DCI.

41. A computer-readable storage medium, comprising: computer software instructions;

the computer software instructions, when run in an apparatus for determining a transport block size or a chip built into an apparatus for determining a transport block size, cause the apparatus to perform a method of determining a transport block size as claimed in any of claims 1-14 or a method of determining a transport block size as claimed in any of claims 29-34.