CN110611549B

CN110611549B - Method for determining size of transmission block, transmission method and device

Info

Publication number: CN110611549B
Application number: CN201810623200.0A
Authority: CN
Inventors: 吴艺群; 王超; 陈雁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-06-15
Filing date: 2018-06-15
Publication date: 2021-04-09
Anticipated expiration: 2038-06-15
Also published as: CN110611549A; WO2019238131A1

Abstract

The embodiment of the invention provides a method for determining the size of a transmission block, a transmission method and a device, and relates to the technical field of communication. To reduce signaling overhead, the scheme includes: the first equipment acquires a parameter index; the first equipment determines a modulation order, a code rate, an expansion factor and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index according to the parameter index and a preset mapping relation; wherein the preset mapping relationship comprises: at least one index, and parameter values for a set of parameters associated with each index of the at least one index, the set of parameters including: modulation order, code rate, spreading factor and NOMA multiplexing layer number; and the first equipment determines the size of a transmission block communicated with the second equipment according to the modulation order, the code rate, the expansion factor and the NOMA multiplexing layer number corresponding to the parameter index.

Description

Method for determining size of transmission block, transmission method and device

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method for determining the size of a transmission block, a transmission method and a device.

Background

In a wireless communication system, the channel quality of a wireless channel varies with time and frequency, exhibiting properties of time-selective and frequency-selective fading. The wireless transmission can adapt to the change of the channel quality by adjusting a Modulation and Coding Scheme (MCS), so as to improve the reliability and throughput of the wireless transmission. Adjusting the MCS is also referred to as link adaptation. I.e. the appropriate modulation order and code rate can generally be selected depending on the channel quality. In a fifth generation (5G) mobile communication system, which may also be referred to as a New Radio (NR) system, several different MCS tables are defined, and correspond to different application scenarios, respectively. As shown in table 1, table 1 shows an MCS table:

MCS Table example in Table 1 NR

The modulation order corresponds to the number of bits of each modulation symbol, and the code rate corresponds to the ratio of the information bits to the coded bits (the information bits include cyclic check bits). For a given MCS table, the sending device may calculate the number of transmitted information bits, also referred to as Transport Block Size (TBS), according to the MCS index and the size of the allocated time-frequency resource.

Non-orthogonal multiple access (NOMA) technology uses multiple sending devices or User Equipments (UEs) to transmit data using the same time-frequency resource to improve system capacity. However, the MCS table in NR is designed only for a scenario where a block of time-frequency resources is used only for transmitting data of a single user equipment, which has not been applicable to calculation of a transport block size when transmitting with NOMA technology. Therefore, how to determine the TBS used in the transmission using the NOMA technique is an urgent problem to be solved.

Disclosure of Invention

The embodiment of the application provides a method, a transmission method and a device for determining the size of a transmission block, which are used for reducing signaling overhead.

In a first aspect, an embodiment of the present application provides a method for determining a size of a transport block, including: the first equipment acquires a parameter index; and the first equipment determines a modulation order, a code rate, an expansion factor and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index according to the parameter index and the preset mapping relation. Wherein, presetting the mapping relation comprises: at least one index, and parameter values for a set of parameters associated with each index in the at least one index, the set of parameters including: modulation order, code rate, spreading factor and NOMA multiplexing layer number; and the first equipment determines the size of a transmission block for communicating with the second equipment according to the modulation order, the code rate, the spreading factor and the NOMA multiplexing layer number corresponding to the index.

The embodiment of the application provides a method for determining the size of a transmission block.A first device determines a modulation order, a code rate, an expansion factor and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to a parameter index by acquiring the parameter index and combining a preset mapping relation. And then determining the size of a transmission block communicated with the second equipment according to the modulation order, the code rate, the spreading factor and the number of the non-orthogonal multiple access NOMA multiplexing layers. Compared with the prior art, the NOMA multiplexing layer number, the expansion factor and other information do not need other signaling notification, so that the signaling design can be simplified, and the signaling overhead can be reduced.

In one possible design, the set of parameters further includes: the spectral efficiency value is obtained by a preset mapping relation, wherein the preset mapping relation comprises at least two indexes, and a plurality of indexes related to the same spectral efficiency value exist in the at least two indexes. Therefore, the MCS can be flexibly adjusted according to the application scene in NOMA transmission, and the link self-adaption is realized.

In one possible design, the parameter values of some of the parameters in a set of parameters corresponding to any two or more of the at least two indices are different.

In one possible design, when the terminal uses multiple MIMO spatial layers for transmission, the first device determines a transport block size for communication with the second device according to a modulation order corresponding to the parameter index, a code rate, a spreading factor, and a number of NOMA multiplexing layers, including: the first device determines a set of parameters for communicating with the second device according to a parameter value of a NOMA multiplexing layer number, a parameter value of a modulation order, a parameter value of a code rate and a parameter value of an expansion factor corresponding to a parameter index of each MIMO spatial layer in the multiple MIMO spatial layers, wherein a set of parameters corresponding to different MIMO spatial layers are different.

In a second aspect, an embodiment of the present application provides a method for determining a transport block size, including: the first equipment acquires a parameter index and an expansion factor; the first equipment determines a modulation order, a code rate and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index according to the parameter index and a preset mapping relation; wherein, presetting the mapping relation comprises: at least one index, and parameter values for a set of parameters associated with each index in the at least one index, the set of parameters including: modulation order, code rate and NOMA multiplexing layer number; and the first equipment determines the size of a transmission block for communicating with the second equipment according to the expansion factor, the modulation order corresponding to the parameter index, the code rate and the NOMA multiplexing layer number.

The embodiment of the invention provides a method for determining the size of a transmission block. And then determining the size of a transmission block communicated with the second equipment according to the modulation order, the code rate, the spreading factor and the number of the non-orthogonal multiple access NOMA multiplexing layers. Compared with the prior art, the NOMA multiplexing layer number does not need other signaling notification, so that the signaling design can be simplified, and the signaling overhead is reduced.

In one possible design, when the terminal uses multiple MIMO spatial layers for transmission, the first device determines, for communication with the second device, a spreading factor and a modulation order, a code rate, and a number of NOMA multiplexing layers corresponding to the parameter index, including: the first device determines the transmission block size according to the spreading factor corresponding to each MIMO spatial layer in the multiple MIMO spatial layers, and the parameter value of the modulation order and the parameter value of the code rate corresponding to the parameter index of each MIMO spatial layer, wherein a group of parameters corresponding to different MIMO spatial layers are different.

In a third aspect, an embodiment of the present application provides a method for determining a size of a transport block, including: the method comprises the steps that first equipment obtains a parameter index and the number of non-orthogonal multiple access NOMA multiplexing layers; the first equipment determines a modulation order, a code rate and an expansion factor corresponding to the parameter index according to the parameter index and a preset mapping relation; wherein, presetting the mapping relation comprises: at least one index, and parameter values for a set of parameters associated with each index in the at least one index, the set of parameters including: modulation order, code rate and spreading factor; and the first equipment determines the size of a transmission block for communicating with the second equipment according to the NOMA multiplexing layer number, the modulation order, the code rate and the expansion factor corresponding to the parameter index.

The embodiment of the invention provides a method for determining the size of a transmission block. And then determining the size of a transmission block communicated with the second equipment according to the modulation order, the code rate, the spreading factor and the number of the non-orthogonal multiple access NOMA multiplexing layers. Compared with the prior art, the expansion factor does not need other signaling notification, so that the signaling design can be simplified, and the signaling overhead can be reduced.

In one possible design, the set of parameters further includes: the spectral efficiency value is obtained by a preset mapping relation, wherein the preset mapping relation comprises at least two indexes, and a plurality of indexes related to the same spectral efficiency value exist in the at least two indexes.

In one possible design, when the terminal uses multiple MIMO spatial layers for transmission, the first device determines, for communication with the second device, a number of NOMA multiplexing layers and a modulation order, a code rate, and a spreading factor corresponding to a parameter index, including: the first device determines the size of a transport block for communication with the second device according to the number of NOMA multiplexing layers corresponding to each MIMO spatial layer in the multiple MIMO spatial layers and the parameter values of a set of parameters corresponding to the parameter index of each MIMO spatial layer.

In a fourth aspect, an embodiment of the present application provides a transmission method, including: the second equipment sends a parameter index to the first equipment, and the parameter index is used for determining a modulation order, a code rate, an expansion factor and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index from a preset mapping relation by the first equipment; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: and the second equipment receives the data sent by the first equipment according to the parameter values of a group of parameters corresponding to the parameter indexes.

In one possible design, when multiple indexes associated with the same spectral efficiency value exist in the preset mapping relationship, and the second device determines that the number of first devices communicating with the second device on the same time-frequency resource is greater than a first threshold, the parameter index is an index with the lowest number of NOMA multiplexing layers corresponding to the multiple indexes. When the number of the first devices is larger than the first threshold value, the NOMA multiplexing layer number is selected to be the lowest, so that the interference between the first devices can be reduced.

In one possible design, when the number of NOMA multiplexing layers corresponding to the plurality of indexes is the same, and the number of the plurality of same NOMA multiplexing layers is the lowest number of NOMA multiplexing layers corresponding to the plurality of parameter indexes, the parameter index is the index with the largest corresponding spreading factor in the plurality of indexes. When the expansion factor is larger, the resources occupied by each expansion unit are more, the transmission reliability is improved, and the corresponding network coverage is enhanced.

In one possible design, when multiple indexes associated with the same spectral efficiency value exist in the preset mapping relationship and the second device determines that the number of first devices communicating with the second device on the same time-frequency resource is smaller than a second threshold, the parameter index is an index with the highest number of NOMA multiplexing layers corresponding to the multiple indexes. When the number of the first devices is smaller than the second threshold, the number of the NOMA multiplexing layers is selected to be the highest, so that the transmission efficiency of each first device can be improved.

In one possible design, when the number of NOMA multiplexing layers corresponding to the plurality of indexes is the same, and the number of the plurality of same NOMA multiplexing layers is the highest number of NOMA multiplexing layers corresponding to the plurality of parameter indexes, the parameter index is the index with the largest corresponding spreading factor in the plurality of indexes. Therefore, the transmission efficiency of each first device can be improved, and when the expansion factor is larger, more resources are occupied by each expansion unit, the transmission reliability is improved, and the corresponding network coverage is enhanced.

In a fifth aspect, an embodiment of the present application provides a transmission method, including: the second equipment sends the parameter index and the expansion factor to the first equipment, and the parameter index is used for the first equipment to determine a modulation order, a code rate and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate and number of NOMA multiplexing layers. And the second equipment receives the data sent by the first equipment according to the expansion factor and the parameter values of a group of parameters corresponding to the parameter index.

In a sixth aspect, an embodiment of the present application provides a transmission method, including: the second equipment sends a parameter index and the number of the non-orthogonal multiple access NOMA multiplexing layers to the first equipment, wherein the parameter index is used for the first equipment to determine a modulation order, a code rate and an expansion factor corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: and the second equipment receives the data sent by the first equipment according to the NOMA multiplexing layer number and the parameter value of a group of parameters corresponding to the parameter index.

In one possible design, when multiple indexes associated with the same spectral efficiency value exist in the preset mapping relationship, and the second device determines that the number of first devices communicating with the second device on the same time-frequency resource is greater than a first threshold, the parameter index is an index with the lowest number of NOMA multiplexing layers corresponding to the multiple indexes.

In one possible design, when the number of NOMA multiplexing layers corresponding to the plurality of indexes is the same, and the number of the plurality of same NOMA multiplexing layers is the lowest number of NOMA multiplexing layers corresponding to the plurality of parameter indexes, the parameter index is the index with the largest corresponding spreading factor in the plurality of indexes.

In one possible design, when multiple indexes associated with the same spectral efficiency value exist in the preset mapping relationship and the second device determines that the number of first devices communicating with the second device on the same time-frequency resource is smaller than a second threshold, the parameter index is an index with the highest number of NOMA multiplexing layers corresponding to the multiple indexes.

In one possible design, when the number of NOMA multiplexing layers corresponding to the plurality of indexes is the same, and the number of the plurality of same NOMA multiplexing layers is the highest number of NOMA multiplexing layers corresponding to the plurality of parameter indexes, the parameter index is the index with the largest corresponding spreading factor in the plurality of indexes.

In a seventh aspect, the present application provides a device for determining a transport block, where the device for determining a transport block may implement the method in the first aspect or any possible implementation manner of the first aspect, and therefore may also achieve the beneficial effects in the first aspect or any possible implementation manner of the first aspect. The apparatus for determining a transport block may be the first device, or may also be an apparatus that can support the first device to implement the method in the first aspect or any possible implementation manner of the first aspect, for example, a chip applied in the first device. The means for determining the transport block may implement the above method by software, hardware, or by executing corresponding software by hardware.

In a seventh aspect, an apparatus for determining a size of a transport block provided in an embodiment of the present application includes: an acquisition unit configured to acquire a parameter index; the determining unit is used for determining a modulation order, a code rate, an expansion factor and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index according to the parameter index and a preset mapping relation; wherein, presetting the mapping relation comprises: at least one index, and parameter values for a set of parameters associated with each index in the at least one index, the set of parameters including: modulation order, code rate, spreading factor and NOMA multiplexing layer number; and the determining unit is further used for determining the size of the transmission block for communicating with the second equipment according to the modulation order, the code rate, the spreading factor and the NOMA multiplexing layer number corresponding to the index.

In one possible design, when the terminal uses multiple MIMO spatial layers for transmission, the determining unit is further specifically configured to: and determining the size of a transmission block communicated with the second equipment according to the parameter value of the NOMA multiplexing layer number, the parameter value of the modulation order, the parameter value of the code rate and the parameter value of the expansion factor corresponding to the parameter index of each MIMO spatial layer in the MIMO spatial layers, wherein a group of parameters corresponding to different MIMO spatial layers are different.

In a possible design, an embodiment of the present application further provides an apparatus for determining a transport block, where the apparatus for determining a transport block may be the first device or a chip applied in the first device, and the apparatus for determining a transport block includes: a processor and a communication interface, wherein the communication interface is configured to enable the apparatus for determining a transport block to perform the steps of receiving and sending messages/data at the apparatus side for determining a transport block described in any one of the possible implementations of the first aspect to the first aspect. The processor is configured to support the apparatus for determining a transport block to perform the steps of performing message/data processing on the apparatus side of the determined transport block as described in any one of possible implementations of the first aspect to the first aspect. For specific corresponding steps, reference may be made to descriptions in any one of possible implementation manners of the first aspect to the first aspect, and details of embodiments of the present application are not described herein again.

Optionally, the communication interface of the apparatus for determining a transport block and the processor are coupled to each other.

Optionally, the apparatus for determining a transport block may further comprise a memory for storing code and data, the processor, the communication interface and the memory being coupled to each other.

In an eighth aspect, the present application provides an apparatus for determining a transport block, which may implement the method in the second aspect or any possible implementation manner of the second aspect, and therefore may also achieve the beneficial effects in the second aspect or any possible implementation manner of the second aspect. The apparatus for determining the transport block may be the first device, or may be an apparatus that can support the first device to implement the second aspect or the method in any possible implementation manner of the second aspect, for example, a chip applied in the first device. The means for determining the transport block may implement the above method by software, hardware, or by executing corresponding software by hardware.

In an eighth aspect, an apparatus for determining a transport block size provided in an embodiment of the present application includes: an obtaining unit, configured to obtain a parameter index and an expansion factor; the determining unit is used for determining a modulation order, a code rate and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index according to the parameter index and a preset mapping relation; wherein, presetting the mapping relation comprises: at least one index, and parameter values for a set of parameters associated with each index in the at least one index, the set of parameters including: modulation order, code rate and NOMA multiplexing layer number; and the determining unit is further used for determining the size of the transmission block for communicating with the second equipment according to the expansion factor, the modulation order corresponding to the parameter index, the code rate and the NOMA multiplexing layer number.

In one possible design, the set of parameters further includes: the preset mapping relation comprises at least two indexes, and the at least two indexes have the same spectral efficiency in a group of parameters associated with a plurality of indexes.

In one possible design, when the terminal uses multiple MIMO spatial layers for transmission, the determining unit is further specifically configured to: and determining the transmission block size according to the expansion factor corresponding to each MIMO spatial layer in the MIMO spatial layers, and the parameter value of the modulation order and the parameter value of the code rate corresponding to the parameter index of each MIMO spatial layer, wherein a group of parameters corresponding to different MIMO spatial layers are different.

In a possible design, an embodiment of the present application further provides an apparatus for determining a transport block, where the apparatus for determining a transport block may be the first device or a chip applied in the first device, and the apparatus for determining a transport block includes: a processor and a communication interface, wherein the communication interface is configured to enable the apparatus for determining a transport block to perform the steps of receiving and transmitting messages/data at the apparatus side for determining a transport block described in any one of possible implementations of the second aspect to the second aspect. The processor is configured to support the apparatus for determining a transport block to perform the steps of performing message/data processing on the apparatus side of the determined transport block as described in any one of possible implementations of the second aspect to the second aspect. For specific corresponding steps, reference may be made to descriptions in any one of possible implementation manners of the second aspect to the second aspect, and details of embodiments of the present application are not described herein again.

In a ninth aspect, the present application provides an apparatus for determining a transport block, where the apparatus for determining a transport block may implement the method in the third aspect or any possible implementation manner of the third aspect, and therefore may also achieve the beneficial effects in any possible implementation manner of the third aspect or the third aspect. The apparatus for determining a transport block may be the first device, or may also be an apparatus that can support the first device to implement the third aspect or the method in any possible implementation manner of the third aspect, for example, a chip applied in the first device. The means for determining the transport block may implement the above method by software, hardware, or by executing corresponding software by hardware.

An apparatus for determining a transport block size provided in a ninth aspect, includes: an obtaining unit, configured to obtain a parameter index and a number of non-orthogonal multiple access (NOMA) multiplexing layers; the determining unit is used for determining a modulation order, a code rate and an expansion factor corresponding to the parameter index according to the parameter index and a preset mapping relation; wherein, presetting the mapping relation comprises: at least one index, and parameter values for a set of parameters associated with each index in the at least one index, the set of parameters including: modulation order, code rate and spreading factor; and the determining unit is further used for determining the size of the transmission block for communicating with the second equipment according to the NOMA multiplexing layer number, the modulation order corresponding to the parameter index, the code rate and the expansion factor.

In one possible design, when the terminal uses multiple MIMO spatial layers for transmission, the determining unit is further specifically configured to: and determining the size of a transmission block communicated with the second equipment according to the number of NOMA multiplexing layers corresponding to each MIMO spatial layer in the multiple MIMO spatial layers and the parameter values of a group of parameters corresponding to the parameter index of each MIMO spatial layer.

In a possible design, an embodiment of the present application further provides an apparatus for determining a transport block, where the apparatus for determining a transport block may be the first device or a chip applied in the first device, and the apparatus for determining a transport block includes: a processor and a communication interface, wherein the communication interface is configured to enable the apparatus for determining the transport block to perform the steps of receiving and sending messages/data at the apparatus side for determining the transport block described in any one of the possible implementations of the third aspect to the third aspect. The processor is configured to support the apparatus for determining a transport block to perform the step of performing message/data processing on the apparatus side of the determined transport block described in any one of possible implementation manners of the third aspect to the third aspect. For specific corresponding steps, reference may be made to descriptions in any one possible implementation manner of the third aspect to the third aspect, and details of embodiments of the present application are not described herein again.

In a tenth aspect, the present application provides a transmission apparatus that can implement the method of the fourth aspect or any possible implementation manner of the fourth aspect, and therefore can also achieve the beneficial effects of the fourth aspect or any possible implementation manner of the fourth aspect. The transmission device may be a second device, or may be a device that can support the second device to implement the fourth aspect or the method in any possible implementation manner of the fourth aspect, for example, a chip applied to the second device. The transmission device can realize the method through software, hardware or corresponding software executed by hardware.

A tenth aspect provides a transmission apparatus comprising: the device comprises a sending unit, a receiving unit and a processing unit, wherein the sending unit is used for sending a parameter index to first equipment, and the parameter index is used for the first equipment to determine a modulation order, a code rate, an expansion factor and a number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate, spreading factor and NOMA multiplexing layer number; and the receiving unit is used for receiving the data sent by the first equipment according to the modulation order, the code rate, the expansion factor and the NOMA multiplexing layer number corresponding to the parameter index.

In one possible design, when a group of parameters associated with a plurality of indexes has a plurality of indexes associated with the same spectral efficiency value in a preset mapping relationship, and the second device determines that the number of first devices communicating with the second device on the same time-frequency resource is greater than a first threshold, the parameter index is an index with the lowest corresponding NOMA multiplexing layer number in the plurality of indexes. When the number of the first devices is larger than the first threshold value, the NOMA multiplexing layer number is selected to be the lowest, so that the interference between the first devices can be reduced.

In a possible design, an embodiment of the present application further provides a transmission apparatus, which may be a second device or a chip applied in the second device, where the transmission apparatus includes: a processor and a communication interface, wherein the communication interface is configured to support the transmission apparatus to perform the steps of receiving and sending messages/data on the transmission apparatus side as described in any one of the possible implementations of the fourth aspect to the fourth aspect. The processor is configured to support the transmission apparatus to perform the steps of message/data processing on the transmission apparatus side as described in any one of the possible implementations of the fourth aspect to the fourth aspect. For specific corresponding steps, reference may be made to descriptions in any one possible implementation manner of the fourth aspect to the fourth aspect, and details of the embodiments of the present application are not described herein again.

Optionally, the communication interface of the transmission device and the processor are coupled to each other.

Optionally, the transmission device may further comprise a memory for storing code and data, the processor, the communication interface and the memory being coupled to each other.

In an eleventh aspect, embodiments of the present application provide a transmission apparatus, which may implement the method in any possible implementation manner of the fifth aspect or the fifth aspect, and therefore, may also achieve the beneficial effects in any possible implementation manner of the fifth aspect or the fifth aspect. The transmission device may be a second device, or may be a device that can support the second device to implement the method in the fifth aspect or any possible implementation manner of the fifth aspect, for example, a chip applied to the second device. The transmission device can realize the method through software, hardware or corresponding software executed by hardware.

Eleventh aspect an embodiment of the present application provides a transmission apparatus, including: the device comprises a sending unit, a receiving unit and a processing unit, wherein the sending unit is used for sending a parameter index and an expansion factor to first equipment, and the parameter index is used for the first equipment to determine a modulation order, a code rate and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate and NOMA multiplexing layer number; and the receiving unit is used for receiving the data sent by the first equipment according to the modulation order, the code rate and the NOMA multiplexing layer number corresponding to the expansion factor and the parameter index.

In a possible design, an embodiment of the present application further provides a transmission apparatus, which may be a second device or a chip applied in the second device, where the transmission apparatus includes: a processor and a communication interface, wherein the communication interface is configured to support the transmission apparatus to perform the steps of receiving and sending messages/data on the transmission apparatus side as described in any one of the possible implementations of the fifth aspect to the fifth aspect. The processor is configured to support the transmission apparatus to perform the steps of message/data processing on the transmission apparatus side as described in any one of the possible implementations of the fifth aspect to the fifth aspect. For specific corresponding steps, reference may be made to descriptions in any one possible implementation manner of the fifth aspect to the fifth aspect, and details of embodiments of the present application are not described herein again.

In a twelfth aspect, embodiments of the present application provide a transmission apparatus, which may implement the method in the sixth aspect or any possible implementation manner of the sixth aspect, and therefore may also achieve the beneficial effects in the sixth aspect or any possible implementation manner of the sixth aspect. The transmission device may be a second device, or may be a device that can support the second device to implement the method in the sixth aspect or any possible implementation manner of the sixth aspect, for example, a chip applied to the second device. The transmission device can realize the method through software, hardware or corresponding software executed by hardware.

A twelfth aspect of the embodiments of the present application provides a transmission apparatus, including: the device comprises a sending unit, a receiving unit and a processing unit, wherein the sending unit is used for sending a parameter index and the number of non-orthogonal multiple access (NOMA) multiplexing layers to first equipment, and the parameter index is used for the first equipment to determine a modulation order, a code rate and an expansion factor corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate and spreading factor; and the receiving unit is used for receiving the data sent by the first equipment according to the NOMA multiplexing layer number, the modulation order corresponding to the parameter index, the code rate and the expansion factor.

In one possible design, when multiple indexes associated with the same spectral efficiency value exist in a preset mapping relationship and the second device determines that the number of first devices communicating with the second device on the same time-frequency resource is greater than a first threshold, the parameter index is an index with the lowest number of NOMA multiplexing layers corresponding to the multiple indexes.

In a possible design, an embodiment of the present application further provides a transmission apparatus, which may be a second device or a chip applied in the second device, where the transmission apparatus includes: a processor and a communication interface, wherein the communication interface is configured to enable the transmission apparatus to perform the steps of receiving and sending messages/data on the transmission apparatus side as described in any one of the possible implementations of the sixth aspect to the sixth aspect. The processor is configured to support the transmitting apparatus to perform the steps of message/data processing on the transmitting apparatus side as described in any one of the possible implementations of the sixth aspect to the sixth aspect. For specific corresponding steps, reference may be made to descriptions in any one possible implementation manner of the sixth aspect to the sixth aspect, and details of the embodiments of the present application are not described herein again.

In a thirteenth aspect, an embodiment of the present invention provides a transmission method, including: the second equipment sends a parameter index to the first equipment, and the parameter index is used for determining a modulation order, a code rate, an expansion factor and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index from a preset mapping relation by the first equipment; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate, spreading factor and NOMA multiplexing layer number; and the second equipment sends data to the first equipment according to the modulation order, the code rate, the expansion factor and the number of the non-orthogonal multiple access NOMA multiplexing layers corresponding to the parameter index.

For various possible designs of the thirteenth aspect, reference may be made to the description in the fourth aspect, and the embodiments of the present application are not described herein again.

In a fourteenth aspect, an embodiment of the present invention provides a transmission method, including: the second equipment sends the parameter index and the expansion factor to the first equipment, and the parameter index is used for the first equipment to determine a modulation order, a code rate and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate and NOMA multiplexing layer number; and the second equipment sends data to the first equipment according to the modulation order, the code rate and the number of the non-orthogonal multiple access NOMA multiplexing layers corresponding to the expansion factor and the parameter index.

For various possible designs of the fourteenth aspect, reference may be made to the description in the fifth aspect, and the embodiments of the present application are not described herein again.

In a fifteenth aspect, an embodiment of the present invention provides a transmission method, including: the second equipment sends a parameter index and the number of the non-orthogonal multiple access NOMA multiplexing layers to the first equipment, wherein the parameter index is used for the first equipment to determine a modulation order, a code rate and an expansion factor corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate and spreading factor; and the second equipment sends data to the first equipment according to the NOMA multiplexing layer number and the modulation order, the code rate and the expansion factor corresponding to the parameter index.

For various possible designs of the fifteenth aspect, reference may be made to the description in the sixth aspect, and the embodiments of the present application are not described herein again.

In a sixteenth aspect, embodiments of the present application provide a transmission apparatus, which can implement the method in any possible implementation manner of the thirteenth aspect or the thirteenth aspect, and therefore can also achieve the beneficial effects in any possible implementation manner of the thirteenth aspect or the thirteenth aspect. The transmission device may be a second device, or may be a device that can support the second device to implement the method in the thirteenth aspect or any possible implementation manner of the thirteenth aspect, for example, a chip applied in the second device. The transmission device can realize the method through software, hardware or corresponding software executed by hardware.

A sixteenth aspect of an embodiment of the present application provides a transmission apparatus, including: the device comprises a sending unit, a receiving unit and a processing unit, wherein the sending unit is used for sending a parameter index to first equipment, and the parameter index is used for the first equipment to determine a modulation order, a code rate, an expansion factor and a number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate, spreading factor and NOMA multiplexing layer number; and the sending unit is further used for sending data to the first equipment according to the modulation order, the code rate, the spreading factor and the number of the non-orthogonal multiple access NOMA multiplexing layers corresponding to the parameter index.

For various possible designs of the sixteenth aspect, reference may be made to the description in the fourth aspect, and the embodiments of the present application are not described herein again.

In a seventeenth aspect, embodiments of the present application provide a transmission apparatus, which may implement the method in any possible implementation manner of the fourteenth aspect or the fourteenth aspect, and therefore may also achieve the beneficial effects in any possible implementation manner of the fourteenth aspect or the fourteenth aspect. The transmission device may be a second device, or may be a device that can support the second device to implement the method in the fourteenth aspect or any possible implementation manner of the fourteenth aspect, for example, a chip applied to the second device. The transmission device can realize the method through software, hardware or corresponding software executed by hardware.

A seventeenth aspect of the embodiments of the present application provides a transmission apparatus, including: the device comprises a sending unit, a receiving unit and a processing unit, wherein the sending unit is used for sending a parameter index and an expansion factor to first equipment, and the parameter index is used for the first equipment to determine a modulation order, a code rate and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate and NOMA multiplexing layer number; and the sending unit is used for sending data to the first equipment according to the modulation order, the code rate and the number of the non-orthogonal multiple access NOMA multiplexing layers corresponding to the expansion factor and the parameter index.

For various possible designs of the seventeenth aspect, reference may be made to the description in the fifth aspect, and the embodiments of the present application are not described herein again.

Eighteenth, the present application provides a transmission apparatus, which can implement the method in any possible implementation manner of the fifteenth aspect or the fifteenth aspect, and therefore can also achieve the beneficial effects in any possible implementation manner of the fifteenth aspect or the fifteenth aspect. The transmission device may be a second device, or may be a device that can support the second device to implement the method in the fifteenth aspect or any possible implementation manner of the fifteenth aspect, for example, a chip applied to the second device. The transmission device can realize the method through software, hardware or corresponding software executed by hardware.

In an eighteenth aspect, an embodiment of the present invention provides a transmission apparatus, including: the device comprises a sending unit, a receiving unit and a processing unit, wherein the sending unit is used for sending a parameter index and the number of non-orthogonal multiple access (NOMA) multiplexing layers to first equipment, and the parameter index is used for the first equipment to determine a modulation order, a code rate and an expansion factor corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate and spreading factor; and the sending unit is further used for sending data to the first equipment according to the NOMA multiplexing layer number and the modulation order, the code rate and the expansion factor corresponding to the parameter index.

For various possible designs of the eighteenth aspect, reference may be made to the description in the sixth aspect, and the embodiments of the present application are not described herein again.

In a nineteenth aspect, embodiments of the present application provide a computer-readable storage medium, in which a computer program or instructions are stored, which, when run on a computer, cause the computer to perform the method described in the first aspect and any one of the possible design manners of the first aspect.

In a twentieth aspect, embodiments of the present application provide a computer-readable storage medium having a computer program or instructions stored thereon, which, when run on a computer, causes the computer to perform the method described in the second aspect and any one of the possible design modes of the second aspect.

In a twenty-first aspect, embodiments of the present application provide a computer-readable storage medium, in which a computer program or instructions are stored, and when the computer program or instructions are run on a computer, the computer is caused to execute the method described in the third aspect and any one of the possible design manners of the third aspect.

In a twenty-second aspect, embodiments of the present application provide a computer-readable storage medium, in which a computer program or instructions are stored, which, when run on a computer, cause the computer to perform the method described in the fourth aspect and any one of the possible design manners of the fourth aspect.

In a twenty-third aspect, embodiments of the present application provide a computer-readable storage medium, in which a computer program or instructions are stored, and when the computer program or instructions are run on a computer, the computer is caused to execute the method described in the fifth aspect and any one of the possible design manners of the fifth aspect.

In a twenty-fourth aspect, embodiments of the present application provide a computer-readable storage medium, in which a computer program or instructions are stored, which, when run on a computer, cause the computer to perform the method described in the sixth aspect and any one of the possible design modes of the sixth aspect.

In a twenty-fifth aspect, embodiments of the present application provide a computer-readable storage medium, in which a computer program or instructions are stored, and when the computer program or instructions are run on a computer, the computer is caused to execute the method described in the thirteenth aspect and any one of the possible design manners of the thirteenth aspect.

In a twenty-sixth aspect, embodiments of the present application provide a computer-readable storage medium, in which a computer program or instructions are stored, and when the computer program or instructions are run on a computer, the computer is caused to execute the method described in any one of the possible design manners of the fourteenth aspect and the fourteenth aspect.

In a twenty-seventh aspect, the present application provides a computer-readable storage medium, in which a computer program or an instruction is stored, and when the computer program or the instruction is run on a computer, the computer is caused to execute the method described in any one of the possible design manners of the fifteenth aspect and the fifteenth aspect.

In a twenty-eighth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the first aspect and one or more of the various possible designs of the first aspect.

In a twenty-ninth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the second aspect and one or more of the various possible designs of the second aspect.

In a thirtieth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform one or more of the various possible designs of the third and fourth aspects.

In a thirty-first aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform one or more of the various possible designs of the fourth aspect and the fourth aspect.

In a thirty-second aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform one or more of the various possible designs of the fifth aspect and the fifth aspect.

In a thirty-third aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform one or more of the various possible designs of the sixth aspect and the sixth aspect.

In a thirty-fourth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform one or more of the various possible designs of the thirteenth and thirteenth aspects.

In a thirty-fifth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform one or more of the various possible designs of the fourteenth and fourteenth aspects.

In a sixteenth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform one or more of the various possible designs of the fifteenth aspect and the fifteenth aspect.

In a thirty-seventh aspect, an embodiment of the present application provides a chip, where the chip includes: a processor coupled to the processor for executing the computer program or instructions to implement the method as described in the first aspect and in any one of the possible designs of the first aspect, and interface circuitry for communicating with other modules than the chip.

In a thirty-eighth aspect, an embodiment of the present application provides a chip, including: a processor for executing a computer program or instructions to implement the method as described in the second aspect and in any one of the possible designs of the second aspect, and interface circuitry for communicating with other modules than the chip.

In a thirty-ninth aspect, an embodiment of the present application provides a chip, including: a processor coupled to the interface circuit, the processor being configured to execute a computer program or instructions to implement the method as described in the third aspect and any one of the possible designs of the third aspect, and the interface circuit being configured to communicate with a module other than the chip.

In a fortieth aspect, an embodiment of the present application provides a chip, including: a processor coupled to the interface circuit, the processor being configured to execute a computer program or instructions to implement the method as described in the fourth aspect and any one of the possible designs of the fourth aspect, and the interface circuit being configured to communicate with a module other than the chip.

In a fortieth aspect, an embodiment of the present application provides a chip, including: a processor for executing a computer program or instructions to implement the method as described in the fifth aspect and in any one of the possible designs of the fifth aspect, and interface circuitry for communicating with other modules than the chip.

In a forty-second aspect, an embodiment of the present application provides a chip, including: a processor coupled to the interface circuit, the processor being configured to execute a computer program or instructions to implement the method as described in the sixth aspect and any one of the possible designs of the sixth aspect, and the interface circuit being configured to communicate with a module other than the chip.

In a forty-third aspect, an embodiment of the present application provides a chip, including: a processor for executing a computer program or instructions to implement the method as described in the thirteenth aspect and any one of the possible designs of the thirteenth aspect, and interface circuitry for communicating with other modules than the chip.

In a fourteenth aspect, an embodiment of the present application provides a chip, where the chip includes: a processor coupled to the interface circuit, the processor being configured to execute a computer program or instructions to implement the method as described in the fourteenth aspect and any one of the possible designs of the fourteenth aspect, and the interface circuit being configured to communicate with a module other than the chip.

In a forty-fifth aspect, an embodiment of the present application provides a chip, including: a processor coupled to the processor for executing the computer program or instructions to implement the method as described in the fifteenth aspect and any one of the possible designs of the fifteenth aspect, and interface circuitry for communicating with other modules than the chip.

Optionally, the chip described above in this application may further include at least one memory, where instructions or computer programs are stored in the at least one memory.

In a sixteenth aspect, an embodiment of the present application provides a communication system, including: the apparatus for determining a transport block size as described in any of the possible designs of the seventh and seventh aspects, and the apparatus for transmitting as described in any of the possible designs of the tenth and tenth aspects.

In a forty-seventh aspect, an embodiment of the present application provides a communication system, including: the apparatus for determining a transport block size as described in any of the possible designs of the eighth aspect and the eighth aspect, and the transport apparatus as described in any of the possible designs of the eleventh aspect and the eleventh aspect.

In a fourteenth aspect, an embodiment of the present application provides a communication system, including: the apparatus for determining a transport block size as described in any of the possible designs of the ninth aspect and the ninth aspect, and the apparatus for transmitting as described in any of the possible designs of the twelfth aspect and the twelfth aspect.

Drawings

Fig. 1 is a first schematic structural diagram of a communication system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

fig. 3 is a third schematic structural diagram of a communication system according to an embodiment of the present invention;

fig. 4 is a first schematic structural diagram of a communication system according to an embodiment of the present invention;

fig. 5 is a first schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 7 is an example of sparse code division multiple access provided by an embodiment of the present invention;

fig. 8 is an example of a MUSA spreading sequence according to an embodiment of the present invention;

fig. 9 is a first flowchart illustrating a communication method according to an embodiment of the present invention;

fig. 10 is a second flowchart illustrating a communication method according to an embodiment of the present invention;

fig. 11 is a first schematic view of a processing flow inside a terminal according to an embodiment of the present invention;

fig. 12 is a schematic view illustrating a processing flow inside a terminal according to an embodiment of the present invention;

FIG. 13 is a diagram of a symbol spreading method based on a spreading sequence;

FIG. 14 is a diagram of a symbol spreading method based on a spreading matrix;

FIG. 15 is a diagram of a symbol spreading method based on a spreading sequence set;

fig. 16 is a third flowchart illustrating a communication method according to an embodiment of the present invention;

fig. 17 is a fourth flowchart illustrating a communication method according to an embodiment of the present invention;

fig. 18 is a third schematic view of a processing flow inside a terminal according to an embodiment of the present invention;

fig. 19 is a fifth flowchart illustrating a communication method according to an embodiment of the present invention;

fig. 20 is a sixth schematic flowchart of a communication method according to an embodiment of the present invention;

fig. 21 is a schematic view of a processing flow inside another terminal according to an embodiment of the present invention;

fig. 22 is a first flowchart of a method for downlink transmission and parameter determination according to an embodiment of the present invention;

fig. 23 is a flowchart illustrating a second method for downlink transmission and parameter determination according to an embodiment of the present invention;

fig. 24 is a third schematic flowchart of a downlink transmission and parameter determination method according to an embodiment of the present invention;

fig. 25 is a first schematic diagram of an apparatus for determining a transport block size according to an embodiment of the present invention;

fig. 26 is a second schematic diagram of an apparatus for determining a transport block size according to an embodiment of the present invention;

fig. 27 is a third schematic diagram of an apparatus for determining a transport block size according to an embodiment of the present invention;

fig. 28 is a first schematic diagram of a transmission device according to an embodiment of the present invention;

fig. 29 is a second schematic diagram of a transmission device according to an embodiment of the present invention;

fig. 30 is a third schematic diagram of a transmission device according to an embodiment of the present invention;

fig. 31 is a schematic structural diagram of a chip according to an embodiment of the present invention.

Detailed Description

It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. 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.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that three relationships may exist. For example, a and/or B, may represent: a is present alone, A and B are present simultaneously, and B is present alone. Wherein, A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple. In addition, in order to facilitate clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other systems. The term "system" may be used interchangeably with "network". CDMA systems may implement wireless technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA may include Wideband CDMA (WCDMA) technology and other CDMA variant technologies. CDMA2000 may cover the Interim Standard (IS) 2000(IS-2000), IS-95 and IS-856 standards. TDMA systems may implement wireless technologies such as global system for mobile communications (GSM). The OFDMA system may implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash OFDMA, etc. UTRA and E-UTRA are UMTS as well as UMTS evolved versions. Various versions of 3GPP in Long Term Evolution (LTE) and LTE-based evolution are new versions of UMTS using E-UTRA. The 5G communication system, New Radio (NR), is the next generation communication system under study. In addition, the communication system can also be applied to future-oriented communication technologies, and the technical solutions provided by the embodiments of the present application are all applied.

The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems. In the embodiment of the present application, the method provided is applied to an NR system or a 5G network as an example. It should be noted that the method provided in the embodiment of the present application may also be applied to other networks, for example, an Evolved Packet System (EPS) network (i.e., a so-called fourth generation (4G) network). Correspondingly, when the method provided by the embodiment of the present application is applied to an EPS network, the network node executing the method provided by the embodiment of the present application may be replaced by a network node in the EPS network.

When the NOMA scheme is used for transmission, an MCS table is shown in table 2, where each MCS index corresponds to a combination of a modulation order, a number of NOMA multiplexing layers (or referred to as a non-orthogonal layer number), and a TBS index. Based on table 2, the terminal determines the corresponding TBS index according to the MCS index, and then determines the transport block size corresponding to the TBS index according to the TBS index. Of course, in an actual process, there may be a TBS table including one or more TBSs and a corresponding number of non-orthogonal layers for each of the one or more TBSs. Thus, the terminal may also determine the number of non-orthogonal layers and then determine the transport block size for communication with the second device in the TBS table using the TBS index and the number of non-orthogonal layers.

TABLE 2 MCS Table used in NOMA technique

MCS index (I)_MCS)	Modulation order (Q)_m)	Non-orthogonal Layer (# Layer)	TBS index (I)_TBS)
				0	4	1	0
1	4	2	1
				2	4	4	2
3	4	6	3
				4	8	2	4
5	8	4	5

When the NOMA mode is adopted for transmission, the TBS size is determined by indicating the TBS index and the number of non-orthogonal layers, while the MCS scheme in the prior NR determines the TBS size by using the modulation order and the code rate, so that an MCS table adopted in the NOMA technology is incompatible with an MCS table used in the NR. Based on this, in the embodiment of the present invention, the terminal obtains the parameter index, and then obtains the parameter values of a set of parameters corresponding to the parameter index according to the parameter index, because the set of parameters includes parameters such as a modulation order, a non-orthogonal layer number, a code rate, and an extension factor, the MCS table used in the NOMA technology can be compatible with the MCS table used in the NR, and because the parameters such as the modulation order, the non-orthogonal layer number, the code rate, and the extension factor are not required to be notified to the terminal by additional signaling, the signaling overhead can be reduced.

As shown in fig. 1, fig. 1 is a schematic diagram illustrating a communication system provided in an embodiment of the present application, where the communication system includes: a network device 101, and one or more terminals (only three terminals, e.g., terminal 102, terminal 103, and terminal 104, are shown in fig. 1) in communication with the network device 101. One or more terminals and the network device form a single-cell communication system, and one or more terminals may send uplink data to the network device 101 on the same time-frequency resource.

As shown in fig. 2, fig. 2 is a schematic diagram illustrating another communication system provided in an embodiment of the present application, where the communication system includes: network device 101, network device 105, and a plurality of terminals (only two of which are shown in fig. 2, e.g., terminal 102 and terminal 103) in communication with network device 102 and network device 105. The network device 101, the network device 105, and the plurality of terminals form a multi-cell communication system, and the network device 101 and the network device 105 may send downlink data to the terminal 102 or the terminal 103 in the same time-frequency resource.

As shown in fig. 3, fig. 3 is a schematic diagram illustrating another communication system provided in the embodiment of the present application, where the communication system includes three or more terminals. (only three are shown in fig. 3, e.g., terminal 102, terminal 103, and terminal 106). Three or more terminals form a device-to-device (D2D) communication system, and terminal 102 and terminal 103 may transmit data to terminal 106 in the same time-frequency resource.

As shown in fig. 4, fig. 4 is a schematic diagram illustrating another communication system provided in an embodiment of the present application, where the communication system includes: a network device 101, and two or more terminals (only two terminals are shown in fig. 4, for example, a terminal 102 and a terminal 103), wherein the network device 101, the two or more terminals constitute a single-cell communication system. The network device 101 and one of the two or more terminals may transmit data to the rest of the two or more terminals on the same time-frequency resource. For example, the network device 101 and the terminal 102 may transmit data to the terminal 103 on the same time-frequency resource.

It is to be understood that the communication system illustrated in fig. 1 to 4 in the embodiments of the present application may further include other network elements, which are not shown in fig. 1 to 4. The embodiments of the present application do not limit the number of terminals and network devices included in the communication system.

A terminal in the embodiments of the present application is an entity for transmitting or receiving signals, and may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal may also be a Station (ST) in a Wireless Local Area Network (WLAN), and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with a wireless communication function, a computing device, or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device (also referred to as a wearable smart device). The terminal may also be a terminal in a next generation communication system, for example, a terminal in 5G or a terminal in a Public Land Mobile Network (PLMN) for future evolution, a terminal in a New Radio (NR) communication system, and the like.

As an example, in the embodiment of the present invention, the terminal may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

A network device is an entity that can be used in conjunction with a terminal to transmit or receive signals. For example, the Access Point (AP) in the WLAN, the base station (BTS) in the global system for mobile communication (GSM) or Code Division Multiple Access (CDMA), the base station (NodeB, NB) in the Wideband Code Division Multiple Access (WCDMA), the evolved Node B (eNB, or eNodeB) in the Long Term Evolution (LTE), or the relay station or access point, or the vehicle-mounted device, the wearable device, and the network device in the future 5G network or the network device in the future evolved PLMN network, etc. may be used.

In addition, in the embodiment of the present invention, the network device provides a service for a cell, and the terminal communicates with the network device through a transmission resource (for example, a time domain resource, or a frequency domain resource, or a time frequency resource) used by the cell. The cell may be a cell corresponding to a network device (e.g., a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell (small cell), where the small cell may include: urban cell (metro cell), micro cell (microcell), Pico cell (Pico cell), femto cell (femto cell), etc., which have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission service.

Since the future access network may be implemented by using a cloud radio access network (C-RAN) architecture, a possible way is to divide the protocol stack architecture and functions of the conventional base station into two parts, one part is called a Central Unit (CU) and the other part is called a Distributed Unit (DU), and the actual deployment ways of the CUs and the DU are flexible, for example, CU parts of a plurality of base stations are integrated together to form a functional entity with a large scale. Fig. 5 is a schematic diagram of a network architecture according to an embodiment of the present application. As shown in fig. 5, the network architecture includes a Core Network (CN) device and an access network (RAN) device. The RAN device includes a baseband device and a radio frequency device, where the baseband device may be implemented by one node or by multiple nodes, and the radio frequency device may be implemented independently by being pulled away from the baseband device, may also be integrated in the baseband device, or may be partially pulled away and partially integrated in the baseband device. For example, in an LTE communication system, a RAN device (eNB) includes a baseband device and a radio frequency device, where the radio frequency device may be arranged in a remote manner with respect to the baseband device (e.g., a Radio Remote Unit (RRU) is arranged with respect to a baseband processing unit (BBU)), and the RAN device is implemented by a node for implementing functions of protocol layers such as Radio Resource Control (RRC), packet data convergence layer protocol (PDCP), Radio Link Control (RLC), and Medium Access Control (MAC). As another example, in an evolution structure, a baseband device may include a Centralized Unit (CU) and a Distributed Unit (DU), and a plurality of DUs may be centrally controlled by one CU. As shown in fig. 5, the CU and the DU may be divided according to protocol layers of the wireless network, for example, functions of a packet data convergence layer protocol layer and protocol layers above the packet data convergence layer are disposed in the CU, and functions of protocol layers below the PDCP, for example, functions of a Radio Link Control (RLC) layer, a medium access control layer, and the like are disposed in the DU.

This division of the protocol layers is only an example, and it is also possible to divide the protocol layers at other protocol layers, for example, at the RLC layer, and the functions of the RLC layer and the protocol layers above are set in the CU, and the functions of the protocol layers below the RLC layer are set in the DU; alternatively, the functions are divided into some protocol layers, for example, a part of the functions of the RLC layer and the functions of the protocol layers above the RLC layer are provided in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are provided in the DU. In addition, the processing time may be divided in other manners, for example, by time delay, a function that needs to satisfy the time delay requirement for processing is provided in the DU, and a function that does not need to satisfy the time delay requirement is provided in the CU.

In addition, the radio frequency device may be pulled away, not placed in the DU, or integrated in the DU, or partially pulled away and partially integrated in the DU, which is not limited herein.

In addition, with continuing reference to fig. 6, with respect to the architecture shown in fig. 5, the Control Plane (CP) and the User Plane (UP) of the CU may be separated and implemented by being divided into different entities, i.e. a control plane CU entity (CU-CP entity) and a user plane CU entity (CU-UP entity), respectively.

In the above network architecture, data generated by a CU may be transmitted to a terminal through a DU, or data generated by a terminal may be transmitted to a CU through a DU. The DU may not parse the data and directly encapsulate the data through a protocol layer and transmit the encapsulated data to the terminal or CU. For example, data of the RRC or PDCP layer is finally processed into data of a physical layer (PHY) and transmitted to the terminal, or converted from received data of the PHY layer. Under this architecture, the data of the RRC or PDCP layer can also be considered to be transmitted by the DU.

In the above embodiment, the CU is divided into network devices in the RAN, and furthermore, the CU may also be divided into network devices in the CN, which is not limited herein.

The apparatus in the following embodiments of the present application may be located in a terminal or a network device according to the functions implemented by the apparatus. When the above structure of CU-DU is adopted, the network device may be a CU node, or a DU node, or a RAN device including the functions of the CU node and the DU node.

One common NOMA scheme is that the transmission signals of the terminals are superposed in a power domain, and an interference cancellation algorithm is adopted by a receiving side to eliminate interference among a plurality of terminals. In addition, various NOMA schemes in which the transmission signal is superimposed in the code domain have been proposed in the industry. For example, Sparse Code Multiple Access (SCMA) distinguishes terminals by different Sparse codes, and reduces interference between terminals by using sparsity of the Sparse codes to improve transmission performance. Fig. 7 shows an example of a SCMA scheme, including 6 different sparse codes. Where the 1 st and 3 rd REs of sparse code 1 are fixed to 0, while the 2 nd and 4th REs of sparse code 2 are fixed to 0, and so on. The 4 REs corresponding to each sparse codeword are referred to as an extension unit, the size of the extension unit is referred to as a Spreading Factor (Spreading Factor), and the corresponding Spreading Factor in fig. 7 is 4. Spreading factors are sometimes also referred to as spreading factors. Another code domain superposition scheme is multi-user Shared Access (MUSA), which distinguishes terminals by different spreading sequences and improves transmission performance by using interference between spreading sequences with low correlation reduction. Fig. 8 shows an example of a MUSA spreading sequence, which includes 8 different spreading sequences. Similarly, the 4 REs corresponding to each spreading sequence are referred to as a spreading unit, and the corresponding spreading factor is 4. In addition, NOMA may also improve single-user transmission performance through multi-layer transmission, such as allocating multiple sparse codes or spreading sequences to the same user, thereby improving single-user throughput.

A method for determining a transport block size in the present application may be performed by a first device, or may be performed by a device (e.g., a chip) applied to the first device for determining the transport block size, or may be performed by a second device, or may be performed by a transmission device (e.g., a chip) applied to the second device.

The first device in this embodiment may be a terminal. The second device may be a terminal or a network device. Illustratively, in the communication system shown in fig. 3, the first device may be the terminal 102 and the second device may be the terminal 106. For example, in the communication systems shown in fig. 1, fig. 2 and fig. 4, the first device may be a terminal, and the second device may be a network device. The following embodiments will take as an example the execution subject of the method for determining the size of the transport block as a terminal and the execution subject of the transport method as a network device. It is to be understood that, in an actual process, the transmission method referred to in the following embodiments and taking the network device as an execution subject may also be executed by the terminal 106 as shown in fig. 3.

As shown in fig. 9, an embodiment of the present application provides a communication method, where the communication method includes:

s101, the network equipment sends the parameter index to the terminal. The parameter index is used for the first equipment to determine a modulation order, a code rate and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, and the group of parameters comprises: modulation order, code rate and number of NOMA multiplexing layers.

Specifically, the network device may determine the parameter index according to information such as channel conditions. For example, the Channel condition may be a Channel Quality Indicator (CQI). For example, the network device sends a reference signal for channel measurement, and the terminal measures the signal-to-noise ratio of the reference signal and calculates the corresponding CQI according to the signal-to-noise ratio. And feeds back the CQI to the network device, which may determine a parameter index according to the CQI.

The preset mapping relationship in the embodiment of the present application may exist in a table form. When the preset mapping relationship exists in a table form, the preset mapping relationship may be referred to as an MCS table, and the parameter index may be referred to as an MCS index. As shown in table 3, table 3 shows an example of the MCS table when the NOMA technique is used in the embodiment of the present application, which includes: index, modulation order, code rate, NOMA multiplexing layer number, spreading factor, spectrum efficiency and other information.

Table 3 MCS table example for NOMA techniques

In order to enable NOMA transmission to flexibly adjust MCS according to application scenarios, different combinations may correspond to the same spectrum efficiency, the network device may determine the parameter index by the following manner 1 and manner 2.

Mode 1, when the network device determines that an index associated with the same spectral efficiency value exists in a preset mapping relation, and the network device determines that the number of terminals communicating with the network device on the same time-frequency resource is greater than or equal to a first threshold value, the parameter index is an index with the lowest corresponding NOMA multiplexing layer number in a plurality of indexes. For example, the first threshold is 8, or the first threshold is twice the value of the parameter for which the spreading factor F corresponds.

For example, in table 3, MCS 0 corresponds to code rate R480/1024, NOMA multiplexing layer number L1, spreading factor F4, and spectral efficiency 0.2344; MCS 3 corresponds to code rate 240/1024, NOMA multiplexing layer number L2, spreading factor F4 and spectral efficiency 0.2344. When the network device determines that the number of terminals communicating with the network device on the same time-frequency resource is greater than a first threshold, the number of NOMA multiplexing layers L corresponding to MCS 0 is 1 less than that corresponding to MCS 3, and the number of NOMA multiplexing layers L is 2. Therefore, the network device may select MCS 0, i.e., reduce interference between terminals communicating with the network device using single-layer transmission.

Since in practice the following scenarios may exist: the number of NOMA multiplexing layers corresponding to the plurality of indexes is the same, and the number of the same NOMA multiplexing layers is the lowest NOMA multiplexing layer corresponding to the plurality of parameter indexes. Thus, in this scenario, the network device may determine the parameter index as any one of a plurality of indexes. Specifically, in order to improve transmission reliability, the network device may determine the parameter index as an index with the largest spreading factor among the plurality of indexes.

For example, in table 3, MCS 0 corresponds to code rate R480/1024, NOMA multiplexing layer number L1, spreading factor F4, and spectral efficiency 0.2344; MCS 1 corresponds to code rate 240/1024, NOMA multiplexing layer number L1, spreading factor F2 and spectral efficiency 0.2344. MCS 3 corresponds to code rate 240/1024, NOMA multiplexing layer number L2, spreading factor F4 and spectral efficiency 0.2344. When the network device determines that the number of terminals communicating with the network device on the same time-frequency resource is greater than a first threshold, the number of NOMA multiplexing layers L corresponding to MCS ═ 0 is 1, and the number of NOMA multiplexing layers L corresponding to MCS ═ 0 is 1 less than that of the number of NOMA multiplexing layers L corresponding to MCS ═ 3 is 2. Thus, the network device may select MCS 0 or MCS 1. However, in order to improve transmission reliability while reducing interference between terminals communicating with the network device by using single-layer transmission, since the spreading factor F-4 corresponding to MCS-0 is greater than the spreading factor F-2 corresponding to MCS-0, the network device may select MCS-0 as a parameter index.

And 2, the network equipment determines that indexes associated with the same spectral efficiency value exist in the preset mapping relation, and when the network equipment determines that the number of terminals communicating with the network equipment on the same time-frequency resource is less than or equal to a second threshold value, the parameter index is the index with the highest NOMA multiplexing layer number corresponding to the plurality of indexes. For example, the second threshold is 4, or the second threshold is a parameter value corresponding to the spreading factor F.

Illustratively, in conjunction with table 3, when the network device determines that the number of terminals communicating with the network device on the same time-frequency resource is less than or equal to the second threshold, since the number of NOMA multiplexing layers L ═ 1 corresponding to MCS ═ 0 is less than the number of NOMA multiplexing layers L ═ 2 corresponding to MCS ═ 3. Therefore, the network device may select MCS 3, that is, the transmission efficiency of each terminal communicating with the network device is improved by using multi-layer transmission.

Since in practice the following scenarios may exist: the number of NOMA multiplexing layers corresponding to the plurality of indexes is the same, and the number of the same NOMA multiplexing layers is the highest NOMA multiplexing layer corresponding to the plurality of parameter indexes. Thus, in this scenario, the network device may determine the parameter index as any one of a plurality of indexes. Specifically, in this scenario, the network device may determine the parameter index as an index with the largest corresponding spreading factor among the plurality of indexes.

For example, with reference to table 3, MCS 0 corresponds to code rate R480/1024, NOMA multiplexing layer number L1, spreading factor F4, and spectral efficiency 0.2344. MCS 3 corresponds to code rate 240/1024, NOMA multiplexing layer number L2, spreading factor F4 and spectral efficiency 0.2344. MCS 4 corresponds to code rate 120/1024, NOMA multiplexing layer number L2, spreading factor F2 and spectral efficiency 0.2344. When the network device determines that the number of terminals communicating with the network device on the same time-frequency resource is greater than the first threshold, since the number of NOMA multiplexing layers L equal to 1 corresponding to MCS equal to 0, the number of NOMA multiplexing layers L equal to 2 corresponding to MCS equal to 3 and the number of NOMA multiplexing layers L equal to 2 corresponding to MCS equal to 4 are smaller than MCS equal to 3, and the number of NOMA multiplexing layers L equal to 2 corresponding to MCS equal to 3 and the number of NOMA multiplexing layers L equal to 2 corresponding to MCS equal to 4. In this case, to improve transmission reliability and enhance network coverage, the network device may select MCS 4 as the parameter index. Therefore, the transmission efficiency of each terminal communicating with the network equipment can be improved by adopting multi-layer transmission, and the transmission reliability can be improved.

Table 4 MCS table example for NOMA technique (number of terminals greater than first threshold)

Table 5 MCS table example for NOMA technique (number of terminals less than second threshold)

The preset mapping relationship in the embodiment of the present application can also be implemented by a plurality of MCS tables, and different MCS tables respectively correspond to different numbers of terminals. As shown in table 4 and table 5, table 5 and table 4 respectively show two MCS table examples when the NOMA technique is used in the embodiment of the present application. And when the number of the terminals communicating on the same time-frequency resource is greater than the first threshold value, adopting a preset mapping relation corresponding to the table 4. And when the number of the terminals communicating on the same time-frequency resource is smaller than a second threshold value, adopting a preset mapping relation corresponding to the table 5. In this case, the network device may further send, to the terminal, a target index corresponding to the preset mapping relationship, where the target index corresponding to the preset mapping relationship is used for the terminal to determine the preset mapping relationship corresponding to the target index. For example, when the network device determines that the number of terminals communicating on the same time-frequency resource is greater than the first threshold, the network device may send the MCS table index corresponding to table 4 and the parameter index in the MCS table corresponding to table 4 to the terminal. The terminal can thus determine the parameter values of a set of parameters corresponding to the parameter index from table 4 according to the parameter index.

For example, in this embodiment of the present application, the network device may send the parameter index to the terminal through a Radio Resource Control (RRC) configuration message, a Medium Access Control (MAC) Control Element (CEs), or Downlink Control Information (DCI).

S102, the terminal acquires the parameter index.

In one example, the terminal may obtain the parameter index from an RRC configuration message, MAC CEs, or DCI transmitted by the network device.

For another example, the terminal may determine the parameter index according to information such as channel conditions. For example, the channel condition may be a CQI for the reference signal. In this implementation, after determining the parameter index, the terminal may further notify the determined parameter index to the network device through a control message or a preset rule. It is to be understood that step S101 may be omitted when the terminal determines the parameter index according to information such as channel conditions.

The parameter index in the embodiment of the present application may be represented by using a fixed number of bits, for example, the parameter index refers to a 5-bit representation in the existing NR system. The same bit number is adopted, so that the method is compatible with the existing signaling design, and the system design is simplified.

S103, the terminal determines a modulation order, a code rate, an expansion factor and the number of non-orthogonal multiple access NOMA multiplexing layers corresponding to the parameter index according to the parameter index and a preset mapping relation.

The terminal in the embodiment of the invention has a preset mapping relation, and the preset mapping relation can be pre-configured to the terminal or can be sent to the terminal by the network equipment. The embodiments of the present application do not limit this.

Optionally, a set of parameters corresponding to different parameter indexes in the application is different.

In one aspect, the different set of parameters in the embodiments of the present application may refer to: the parameter values of all the parameters included in the two sets of parameters are different. For example, a set of parameters corresponding to index 1 and a set of parameters corresponding to index 2 do not refer to: the modulation order corresponding to the index 1 is different from the modulation order corresponding to the parameter index 2, the code rate corresponding to the index 1 is different from the code rate corresponding to the index 2, the number of NOMA multiplexing layers corresponding to the index 1 is different from the number of NOMA multiplexing layers corresponding to the index 2, and the expansion factor corresponding to the index 1 is different from the expansion factor corresponding to the parameter index 2. In addition, the method can further comprise the following steps: the spectral efficiency corresponding to index 1 is different from the spectral efficiency corresponding to index 2.

On the other hand, the different set of parameters in the embodiments of the present application may also refer to: the parameter values of some parameters included in any two groups of parameters are different, and the parameter values of other some parameters are the same. For example, a set of parameters corresponding to index 1 and a set of parameters corresponding to index 2 do not refer to: the modulation order corresponding to the index 1 is the same as the modulation order corresponding to the index 2, but the code rate corresponding to the index 1 is different from the code rate corresponding to the index 2, the number of NOMA multiplexing layers corresponding to the index 1 is the same as the number of NOMA multiplexing layers corresponding to the index 2, and the expansion factor corresponding to the index 1 is different from the expansion factor corresponding to the index 2. In addition, the method can further comprise the following steps: the spectral efficiency corresponding to index 1 is different from the spectral efficiency corresponding to index 2.

Optionally, as shown in table 3, a set of parameters in the embodiment of the present application may further include spectral efficiency, where the preset mapping relationship in the embodiment of the present application includes at least two indexes, and an index associated with the same spectral efficiency value exists in the at least two indexes. Thus, the MCS can be flexibly adjusted according to the application scene in NOMA transmission, and different combinations can correspond to the same spectrum efficiency.

Further optionally, the parameter values of some of the parameters in a set of parameters corresponding to any two or more of the at least two indexes are different.

For example, the spectral efficiency corresponding to parameter index 1 is the same as the spectral efficiency corresponding to parameter index 2, and the spreading factor corresponding to parameter index 1 is different from the spreading factor corresponding to parameter index 2.

And S104, the terminal determines the size of a transmission block communicated with the second equipment according to the modulation order, the code rate, the expansion factor and the NOMA multiplexing layer number corresponding to the parameter index.

Illustratively, step S104 may be implemented by: the terminal determines the number of Resource Elements (REs) used for data transmission, calculates the number of information bits according to the number of REs used for data transmission and the modulation order, the code rate, the spreading factor and the NOMA multiplexing layer number corresponding to the parameter index, quantizes the number of the information bits, and determines the size of a transmission block communicated with the second device.

For example, the terminal may determine the number of REs used for data transmission by: the terminal may be obtained by multiplying the number of REs for data transmission by the number of RBs for data transmission in each RB. Wherein the number of REs used for data transmission in each RB is equal to the number of REs used for demodulation reference signals subtracted from the number of REs used for each RB, and subtracted from the number of REs used for other channels (e.g., control channels) or reference signals.

For example, the terminal may be based on formula N_info＝N_RE×R×L×Q_mThe number of information bits is calculated by/F, where N_REIndicating the number of REs used for data transmission, R indicating the code rate, L indicating the number of NOMA multiplexing layers, Q_mRepresenting the modulation order, F the spreading factor, N_infoRepresenting the number of information bits.

Specifically, the terminal quantizes the number of information bits, and a method for determining the size of the transport block can be implemented in the manner described in reference to 3GPP TS38.214, 5.1.3.2.

When multiple antennas are deployed at the transmitting end and the receiving end, multiple data streams can be simultaneously transmitted by using the multiple antennas, and each data stream is referred to as a MIMO spatial layer. When a transmitting end (e.g., a terminal) uses multiple MIMO spatial layers for transmission, it may also be necessary to determine a size of a transmission block for communication with a second device according to a number v of MIMO spatial layers (an integer where v is greater than or equal to 1), where a set of parameters corresponding to different MIMO spatial layers may be different or may be the same.

As shown in fig. 11, there are v MIMO spatial layers in total. Each MIMO spatial layer includes a plurality of NOMA multiplexing layers. Different NOMA multiplexing layers of the same MIMO spatial layer may be multiplexed by either the code domain or the power domain.

Each MIMO spatial layer may use a different MCS index, and the parameter values of a set of parameters corresponding to different MIMO spatial layers are different, that is, different MIMO spatial layers may correspond to different code rates, NOMA multiplexing layer numbers, modulation orders, and spreading factors. In this case: step S104 may be specifically realized by the following manner: and the terminal determines the size of a transmission block communicated with the second equipment according to the RE number used for data transmission, and the parameter value of the NOMA multiplexing layer number, the parameter value of the modulation order, the parameter value of the code rate and the parameter value of the expansion factor corresponding to the parameter index of each MIMO spatial layer in the multiple MIMO spatial layers.

For example, the terminal may be based on a formula

The number of information bits is calculated. Wherein N is_REIndicating the number of REs, R, used for data transmission_iCode rate, Q, representing the ith MIMO spatial layer_m,iRepresents the modulation order, L, of the ith MIMO spatial layer_iNumber of NOMA multiplexing layers, F, representing the i-th MIMO spatial layer_iSpreading factor, N, representing i MIMO spatial layers_infoRepresenting the number of information bits.

The multiple MIMO spatial layers may also use the same MCS index, and correspond to the same parameter values of a set of parameters, that is, the multiple MIMO spatial layers correspond to the same code rate, the same NOMA multiplexing layer number, the same modulation order, and the same spreading factor. The terminal may then determine according to the formula: n is a radical of_info＝N_RE×R×v×L×Q_mthe/F counts the number of information bits. Wherein N is_RERepresenting the number of REs used for data transmission, R representing the code rate, v representing the MIMO spatial layerNumber, L, indicates the number of NOMA multiplexing layers per MIMO layer, Q_mRepresenting the modulation order and F the spreading factor.

As a possible implementation manner, in the embodiment of the present invention, the terminal may further calculate the size of the transport block according to the spectrum efficiency.

For example, the terminal may be based on formula N_info＝N_REXs determines the number of information bits. Wherein N is_REIndicating the number of REs used for data transmission, S indicating the spectral efficiency, N_infoRepresenting the number of information bits.

It should be noted that, if the parameter indexes corresponding to different MIMO spatial layers in the multiple MIMO spatial layers are different, the parameter index acquired by the terminal includes the parameter index of each MIMO spatial layer.

The embodiment of the application provides a method for determining the size of a transmission block, and a terminal determines a modulation order, a code rate, an expansion factor and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to a parameter index by acquiring the parameter index and combining a preset mapping relation. And then determining the size of a transmission block communicated with the second equipment according to the modulation order, the code rate, the spreading factor and the number of the non-orthogonal multiple access NOMA multiplexing layers. Compared with the prior art, the NOMA multiplexing layer number, the expansion factor and other information do not need other signaling notification, so that the signaling design can be simplified, and the signaling overhead can be reduced.

As another embodiment of the present invention, as shown in fig. 10, after step S105, the method further includes:

and S105, the terminal sends data to the network equipment according to the modulation order, the code rate, the expansion factor and the NOMA multiplexing layer number corresponding to the parameter index.

And S106, the network equipment receives the data sent by the terminal according to the modulation order, the code rate, the expansion factor and the NOMA multiplexing layer number corresponding to the parameter index.

Specifically, as shown in fig. 12, after determining the modulation order, the code rate, the spreading factor, and the number of NOMA multiplexing layers corresponding to the parameter index, the terminal may further include the following steps:

and in the process 1, a channel coding module of the terminal performs channel coding on input bits to obtain a coded bit sequence. For channel coding, the number of input bits is equal to the TBS calculated by the terminal in step S104.

The channel coding may provide a certain error correction capability, and the specific coding mode may be a Low Density Parity Check code (LDPC), a Turbo code, a Polar code, or the like.

And 2, carrying out bit scrambling on the coded bit sequence by a bit scrambling module of the terminal to obtain a scrambled bit sequence.

The bit scrambling is to perform exclusive or operation on the coded bit sequence and the scrambling sequence according to bits to obtain scrambled bits. The scrambling sequence is typically generated according to a predefined rule, and the scrambling sequence itself has a certain randomness. Different sending ends can utilize different scrambling sequences to carry out scrambling, thereby reducing the correlation among the data of the sending ends and reducing the interference generated during simultaneous sending. The bit scrambling module in fig. 12 may be replaced by bit interleaving, which functions similarly to bit scrambling. Bit interleaving and bit scrambling may also be used simultaneously, scrambling may be performed first and then interleaving may be performed, or interleaving may be performed first and then scrambling may be performed, which is not limited in the embodiment of the present application.

And 3, modulating the scrambled bit sequence by the terminal to obtain a modulation symbol. For example, the modulation module of the terminal may modulate the scrambled bit sequence using a modulation order corresponding to the parameter index.

Where modulation can be seen as a mapping of bits to symbols.

For example, modulation may employ a modulation scheme that maps one or more bits to a single modulation symbol. For example, pi/2-Binary Phase Shift Keying (BPSK), BPSK, Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (QAM), 64QAM, 256QAM, etc.

Modulation may also employ a scheme that maps one or more bits to a plurality of modulation symbols, also referred to as multi-dimensional modulation. For example, a codebook for Sparse Code Multiple Access (SCMA) maps two bits onto two REs, e.g., 00, 01, 10, 11 are mapped to (1, 0) (0, 1), (0, -1), (-1, 0), respectively, where one symbol in parentheses corresponds to one RE.

And 4, performing layer mapping on the modulation symbols by a layer mapping module of the terminal. For example, the terminal performs layer mapping on the modulation symbols using the number of NOMA multiplexing layers corresponding to the parameter index.

And 5, performing symbol extension on the modulation symbols subjected to the layer mapping by each symbol extension module of the terminal. For example, the terminal performs symbol spreading on the modulation symbols by using a spreading factor corresponding to the parameter index.

For single-layer transmission, the operation of layer mapping is not needed to be carried out additionally, and the symbol expansion is directly carried out. For multi-layer transmission, the terminal modulates the scrambled bit sequence, then carries out layer mapping to map modulation symbols to different layers, and then carries out symbol spreading to modulation symbols of each layer.

As shown in fig. 13, fig. 13 illustrates a symbol spreading method based on spreading sequences, and two layers of modulation symbols respectively correspond to different spreading sequences. Wherein the modulation symbols of the two layers are respectively 1 and-1, and the spreading sequence is [1, j, -1, -j]^TAnd multiplying the spreading sequence and the two input modulation symbols respectively to obtain output modulation symbols, wherein the first 4 output modulation symbols correspond to a first input modulation symbol, and the last 4 output modulation symbols correspond to a second input modulation symbol. The spreading factor is determined by the terminal from a preset relationship according to the parameter index, i.e. the spreading factor F in the MCS table.

In fig. 13, taking a spreading factor of 4 as an example, for convenience of description, an output symbol corresponding to each symbol spreading operation is defined as a spreading unit. Each extension unit in fig. 13 comprises 4 output symbols. To support higher spectral efficiency or coverage enhancement, other spreading factors may be employed. When the spreading factor is smaller, the resource occupied by each spreading unit is less, the more data can be carried by the same resource, and the corresponding spectrum efficiency is higher. When the expansion factor is larger, the resources occupied by each expansion unit are more, the transmission reliability is improved, and the corresponding network coverage is enhanced. When the spreading factor is 1, it corresponds to the existing scheme that does not adopt symbol spreading.

As shown in fig. 14, fig. 14 shows a symbol spreading method based on spreading matrices, and modulation symbols of each layer correspond to different spreading matrices. The input modulation symbol is (1, -1), the spreading matrix is W, and the spreading matrix and the input modulation symbol are subjected to matrix multiplication to obtain an output modulation symbol. Unlike spreading sequence-based symbol spreading methods, spreading matrix-based symbol spreading methods may have multiple input modulation symbols at a time. At this time, the spreading factor corresponds to the number of rows of the spreading matrix W. Similarly, the output symbol corresponding to each symbol expansion operation is defined as one symbol expansion unit, and each symbol expansion unit in fig. 14 includes 4 output symbols. When the symbol spreading method based on the spreading matrix is adopted, the spectrum efficiency can be improved or the network coverage can be enhanced by adjusting the spreading factor.

As shown in fig. 15, fig. 15 illustrates a symbol spreading method based on a spreading sequence set, in which N input modulation symbols are mapped to N predefined modulation symbol sequences, respectively. Different spreading sequence sets may be employed for different layer modulation symbols. Illustratively, if the input modulation symbol is x₁The output modulation symbol sequence is [1, j, -1, -j]. Similarly, fig. 15 corresponds to a spreading factor of 4, each spreading unit includes 4 output symbols, and the spreading factor may be adjusted to improve the spectrum efficiency or enhance the network coverage.

In addition, the adjustment factor module in the terminal may further multiply the symbol sequence after symbol spreading, which is input into the respective adjustment factor module, by the adjustment factor for adjusting the power and phase of each layer. The layers are then superimposed in symbols. For a multi-antenna scenario, the superposition may be replaced with MIMO precoding. And finally, performing RE mapping on the superposed or precoded symbol sequence.

As shown in fig. 16, fig. 16 shows another communication method provided by the embodiment of the present invention, where the method includes:

s201, the network equipment sends the parameter index and the expansion factor to the terminal, wherein the parameter index is used for the terminal to determine a modulation order, a code rate and the NOMA multiplexing layer number corresponding to the parameter index from a preset mapping relation. Wherein, presetting the mapping relation comprises: at least one index, and parameter values for a set of parameters associated with each index in the at least one index, the set of parameters including: modulation order, code rate and number of NOMA multiplexing layers.

The parameter index and the spreading factor may be sent to the terminal in the same message, or may be sent to the terminal in different messages. Specifically, the manner in which the network device sends the parameter index and the spreading factor in step S201 may refer to the description in step S101, and is not described herein again in the embodiments of the present invention.

Specifically, the network device may determine the spreading factor according to information such as channel conditions.

S202, the terminal acquires the parameter index and the expansion factor.

It should be noted that, in the present embodiment, when the parameter index and the spreading factor are determined by the terminal according to the channel condition, step S201 may be omitted.

And S203, the terminal determines a modulation order, a code rate and the number of non-orthogonal multiple access (NOMA) multiplexing layers corresponding to the parameter index according to the parameter index and the preset mapping relation.

Illustratively, the preset mapping relationship here differs from the preset mapping relationship in steps S101-S104 in that the preset mapping relationship in this embodiment may not include an expansion factor.

Illustratively, table 6 and table 7 show MCS table examples of NOMA at different spreading factors, respectively.

Table 6 NOMA table example of MCS (spreading factor F ═ 2)

Table 7 NOMA MCS table example (extension factor F ═ 4)

Table 3 is different from tables 6 and 7 in that the spreading factor is dynamically changed according to the parameter index in the scheme shown in table 3, and the spreading factor is fixed in the schemes shown in tables 6 and 7. That is, in table 6, the spreading factor determined by the terminal is 2 regardless of the change of the parameter index, and in table 7, the spreading factor determined by the terminal is 4 regardless of the change of the parameter index.

It should be noted that different indexes in the embodiment of the present invention correspond to different combinations of modulation orders, code rates, and NOMA multiplexing layers. In order to allow for a flexible adjustment of the MCS for NOMA transmission depending on the application scenario, different combinations may correspond to the same spectral efficiency. For example, when the spreading factor F is 4, MCS 0 corresponds to code rate R480/1024, NOMA multiplexing layer number L is 1 and spectral efficiency 0.2344; MCS 3 corresponds to code rate 240/1024, NOMA multiplexing layer number L2 and spectral efficiency 0.2344. When the number of terminals communicating with the network device on the same time-frequency resource is greater than the first threshold, the network device may select MCS 0, that is, single-layer transmission is adopted to reduce inter-terminal interference. When the number of terminals communicating with the network device on the same time-frequency resource is less than the second threshold. The network device may select MCS 3, that is, the transmission efficiency of a single terminal is improved by using multi-layer transmission. Compared with the prior art, the NOMA multiplexing layer number does not need other signaling notification, so that the signaling design can be simplified, and the signaling overhead is reduced.

In the above embodiment, the terminal determines which MCS table to use according to the spreading factor, and then determines the modulation order, the code rate and the number of non-orthogonal multiple access NOMA multiplexing layers corresponding to the parameter index according to the determined MCS table and the parameter index.

And S204, the terminal determines the size of a transmission block communicated with the second equipment according to the expansion factor, the modulation order corresponding to the parameter index, the code rate and the NOMA multiplexing layer number.

Specifically, the implementation manner of step S204 may refer to the description at S104, and the embodiment of the present invention is not described herein again.

Optionally, as another embodiment of the present invention, as shown in fig. 17, after step S204, the method further includes:

and S205, the terminal sends data to the network equipment according to the modulation order, the code rate, the expansion factor and the NOMA multiplexing layer number corresponding to the parameter index.

And S206, the network equipment receives the data sent by the terminal according to the modulation order, the code rate and the NOMA multiplexing layer number corresponding to the expansion factor and the parameter index.

In addition, the terminal may also process the input bits based on fig. 18 in the embodiments described in fig. 16-17. For a specific processing procedure, refer to procedures 1 to 5 described in the above embodiments, which are not described herein again.

It should be noted that the embodiment described in fig. 16 to 18 differs from the embodiment described in fig. 9 to 15 in that the network device sends not only the spreading factor but also the parameter index to the terminal. The spreading factor is obtained by the terminal from the network device in the embodiments described in fig. 16-18, or determined by the terminal based on the channel condition. In the embodiments described in fig. 9 to fig. 15, the expansion factor is obtained from the preset mapping relationship by the terminal according to the parameter index sent by the network device. However, the processing procedure shown in fig. 18 is compared with the processing procedure shown in fig. 12, and in fig. 12, the spreading factor is determined by the terminal from the preset mapping relationship according to the parameter index. In fig. 18, the spreading factor is obtained by the terminal from the network device in advance, or is determined by the terminal according to the channel condition.

It should be noted that, when the terminal and the network device negotiate the specific parameter value of the spreading factor, the network device may not send the spreading factor to the terminal in step S201. Furthermore, when the terminal uses a plurality of MIMO spatial layers for transmission and different MIMO spatial layers correspond to different parameter indexes in steps S201-S206, step S204 is implemented by: and determining the size of a transmission block communicated with the second equipment according to the expansion factor corresponding to each MIMO spatial layer in the multiple MIMO spatial layers, and the parameter value of the modulation order and the parameter value of the code rate corresponding to the parameter index of each MIMO spatial layer. In particular, see above for the terminal computing N when transmitting on multiple MIMO spatial layers_infoThe formula of (a) is not described herein again in the embodiments of the present application.

For a specific implementation process, reference may be made to the description in fig. 11, and details of the embodiment of the present application are not described herein again.

As shown in fig. 19, fig. 19 is a schematic flowchart illustrating another communication method provided in an embodiment of the present application, where the scheme includes:

s301, the network equipment sends the parameter index and the number of the non-orthogonal multiple access NOMA multiplexing layers to the terminal. The parameter index is used for the terminal to determine a modulation order, a code rate and an expansion factor corresponding to the parameter index from a preset mapping relation, wherein the preset mapping relation comprises: at least one index, and parameter values for a set of parameters associated with each index in the at least one index, the set of parameters including: modulation order, code rate, and spreading factor.

Specifically, the network device may determine the parameter index and the number of non-orthogonal multiple access NOMA multiplexing layers according to the channel condition.

The network device may send the parameter index and the number of non-orthogonal multiple access NOMA multiplexing layers to the terminal through MAC CEs, DCI, or RRC message. The parameter index and the number of non-orthogonal multiple access NOMA multiplexing layers may be carried in the same signaling message and sent to the terminal, or may be carried in different messages and sent to the terminal.

Illustratively, table 8 and table 9 show the contents of the preset mapping relationships for different NOMA multiplexing layer numbers, respectively.

Table 8 emma MCS table example (emma multiplex layer number L ═ 1)

MCS index I_MCS	Modulation order Q_m	Code rate Rx [1024 ]]	Spreading factor F	Spectral efficiency
						0	2	480	4	0.2344
1	2	240	2	0.2344
					2	2	120	1	0.2344
3	2	772	4	0.3770
					4	2	386	2	0.3770
5	2	193	1	0.3770

Table 9 emma MCS table example (emma multiplex layer number L ═ 2)

MCS index I_MCS	Modulation order Q_m	Code rate Rx [1024 ]]	Spreading factor F	Spectral efficiency
						0	2	240	4	0.2344
1	2	120	2	0.2344
					2	2	60	1	0.2344
3	2	386	4	0.3770
					4	2	193	2	0.3770
5	2	96.5	1	0.3770

The difference between the preset mapping relationships shown in tables 8 and 9 and the mapping relationship shown in table 3 is that the number of NOMA multiplexing layers in table 3 varies with the parameter index, that is, the number of NOMA multiplexing layers corresponding to different parameter indexes is different. While the number of NOMA multiplexing layers is fixed in tables 8 and 9. For example, the number of NOMA multiplexing layers L is 1 in table 8, and 2 in table 9.

Specifically, the manner how the network device selects the parameter index may refer to the description in step S101, and details of the embodiment of the present application are not repeated herein. For example, when the number L of NOMA multiplexing layers is 1, MCS 0 corresponds to code rate R480/1024, spreading factor F4 and spectral efficiency 0.2344. MCS 1 corresponds to code rate 240/1024, spreading factor F2 and spectral efficiency 0.2344. When and networkWhen the number of terminals that the device communicates on the same time-frequency resource is greater than the first threshold, the network device may select MCS to be 0, that is, the interference between the terminal and the terminal that the network device communicates on the same time-frequency resource is reduced by using a large spreading factor, because the larger the spreading factor, the lower the correlation between the terminals. When the number of terminals communicating with the network device on the same time-frequency resource is smaller than the second threshold, the network device may select MCS 1, that is, a small spreading factor is used to improve the transmission efficiency of each terminal, because the coding efficiency of the terminal corresponding to the small spreading factor is higher. Compared with the prior art, the NOMA multiplexing layer number and the modulation order Q_mInformation such as code rate, expansion factor and the like does not need other signaling notification, so that signaling design can be simplified, and signaling overhead is reduced.

S302, the terminal obtains the parameter index and the number of the non-orthogonal multiple access NOMA multiplexing layers.

Specifically, the method for acquiring the parameter index and the NOMA multiplexing layer number by the terminal may refer to the description in step S202, and details of the embodiment of the present invention are not described herein again.

S303, the terminal determines a modulation order, a code rate and an expansion factor corresponding to the parameter index according to the parameter index and the preset mapping relation.

Specifically, the terminal determines which MCS table to use according to the NOMA multiplexing layer number, and then determines the modulation order, the code rate and the spreading factor corresponding to the parameter index according to the obtained parameter index and the determined MCS table.

And S304, the terminal determines the size of a transmission block communicated with the second equipment according to the NOMA multiplexing layer number, the modulation order, the code rate and the expansion factor corresponding to the parameter index.

For a specific implementation manner of step S304, reference may be made to the description at step S101, and details of the embodiment of the present application are not described herein again.

Optionally, as another embodiment of the present invention, as shown in fig. 20, after step S304, the method further includes:

and S305, the terminal sends data to the network equipment according to the NOMA multiplexing layer number and the modulation order, the code rate and the expansion factor corresponding to the parameter index.

And S306, the network equipment receives the data sent by the terminal according to the NOMA multiplexing layer number, the modulation order, the code rate and the expansion factor corresponding to the parameter index.

In addition, the terminal may also process the input bits based on fig. 21 in the embodiments described in fig. 19 and 20. For a specific processing procedure, refer to procedures 1 to 5 described in the above embodiments, which are not described herein again.

It should be noted that the embodiment described in fig. 19 to 21 differs from the embodiment described in fig. 9 to 15 in that: the network equipment not only sends the parameter index to the terminal, but also sends the NOMA multiplexing layer number to the terminal. The number of NOMA multiplexing layers is obtained by the terminal from the network device in the embodiments described in fig. 19-21, or determined by the terminal according to the channel condition. In the embodiments described in fig. 9 to fig. 15, the expansion factor is obtained from the preset mapping relationship by the terminal according to the parameter index sent by the network device. And compared with the processing procedure shown in fig. 12, in the processing procedure shown in fig. 21, the number of NOMA multiplexing layers in fig. 12 is determined by the MCS selection module of the terminal from the preset mapping relation according to the parameter index. In fig. 21, the number of NOMA multiplexing layers is acquired by the terminal from the network device in advance, or determined by the terminal according to the channel condition.

It should be noted that, when the terminal and the network device negotiate a specific parameter value of the NOMA multiplexing layer number, the network device may not send the NOMA multiplexing layer number to the terminal in step S301.

When the terminal uses multiple MIMO spatial layers for transmission, step S304 can also be implemented by: and determining the size of a transmission block communicated with the second equipment according to the number of NOMA multiplexing layers corresponding to each MIMO spatial layer in the multiple MIMO spatial layers and the code rate, the modulation order and the expansion factor corresponding to the parameter index of each MIMO spatial layer. In this case, a specific implementation manner of determining the size of the transport block communicated with the second device may refer to the description in fig. 11, and details of the embodiment of the present invention are not described herein again. Specifically, N is calculated when the parameter indexes corresponding to different MIMO spatial layers are different and the parameter indexes corresponding to different MIMO spatial layers are the same_infoAll can be referred toThe embodiments of the present application are not described herein again.

As shown in fig. 22, fig. 22 provides a downlink transmission and parameter determination method, where the method includes:

s401, the network device sends a parameter index to the terminal, where the parameter index is used to determine parameter values of a set of parameters from a preset mapping relationship, where the preset mapping relationship includes at least one index and parameter values of a set of parameters associated with each index in the at least one index, and the set of parameters includes: code rate, modulation order, number of NOMA multiplexing layers, and spreading factor.

The specific form of the preset mapping relationship may refer to the description in step S101, and is not described herein again in the embodiments of the present invention.

S402, the terminal acquires the parameter index.

For a specific implementation manner of step S402, reference may be made to the description at step S102, and details of the embodiment of the present invention are not described herein again.

And S403, the terminal determines parameter values of a group of parameters corresponding to the parameter index according to the parameter index and the preset mapping relation.

S404, the network equipment sends data to the terminal according to the parameter values of the group of parameters corresponding to the parameter indexes.

S405, the terminal receives data sent by the network equipment according to the parameter values of the group of parameters corresponding to the parameter indexes.

As shown in fig. 23, fig. 23 provides a downlink transmission and parameter determining method, where the method includes:

s501, the network device sends a parameter index and an extension factor to the terminal, where the parameter index is used to determine parameter values of a set of parameters from a preset mapping relationship, where the preset mapping relationship includes at least one index and parameter values of a set of parameters associated with each index in the at least one index, and the set of parameters includes: code rate, modulation order, and number of NOMA multiplexing layers.

S502, the terminal acquires the parameter index and the expansion factor.

The specific implementation manner of step S502 may refer to the description at step S102, and the embodiment of the present invention is not described herein again.

S503, the terminal determines parameter values of a group of parameters corresponding to the parameter index according to the parameter index and the preset mapping relation.

S504, the network equipment sends data to the terminal according to the parameter values of the group of parameters corresponding to the parameter indexes and the expansion factors.

And S505, the terminal receives data sent by the network equipment according to the expansion factor and the parameter values of the group of parameters corresponding to the parameter index.

As shown in fig. 24, fig. 24 provides a downlink transmission and parameter determination method, which includes:

s601, the network device sends a parameter index and a NOMA multiplexing layer number to the terminal, where the parameter index is used to determine parameter values of a set of parameters from a preset mapping relationship, where the preset mapping relationship includes at least one index and parameter values of a set of parameters associated with each index in the at least one index, and the set of parameters includes: code rate, modulation order, and spreading factor.

And S602, the terminal acquires the parameter index and the NOMA multiplexing layer number.

For a specific implementation manner of step S602, reference may be made to the description at step S102, and details of the embodiment of the present invention are not described herein again.

S603, the terminal determines parameter values of a group of parameters corresponding to the parameter index according to the parameter index and the preset mapping relation.

And S604, the network equipment sends data to the terminal according to the parameter values of the group of parameters corresponding to the parameter index and the number of the NOMA multiplexing layers.

And S605, the terminal receives the data sent by the network equipment according to the NOMA multiplexing layer number and the parameter value of the group of parameters corresponding to the parameter index.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is understood that each network element, for example, a terminal or a network device, includes a hardware structure and/or a software module for performing each function in order to realize the functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware, software, or combinations of hardware and software. 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 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. The following description will be given by taking the division of each function module corresponding to each function as an example:

in the case of an integrated unit, fig. 25 shows a schematic diagram of a possible structure of an apparatus for determining a transport block size according to the above embodiment, where the apparatus for determining a transport block size may be a terminal or a chip applied in a terminal. The apparatus for determining a transport block size includes: an acquisition unit 201 and a determination unit 202. Wherein, the obtaining unit 201 is configured to support the apparatus for determining the transport block size to execute step S102 in the above embodiment. The determining unit 202 is configured to support the apparatus for determining the transport block size to perform steps S103 and S104 in the above-described embodiment. Optionally, the apparatus for determining a size of a transport block further includes: a sending unit 203, configured to support the apparatus for determining the transport block size to execute step S105 in the foregoing embodiment. 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.

As another possible implementation manner, the obtaining unit 201 in the embodiment of the present application is configured to support the apparatus for determining the transport block size to perform step S202 in the above embodiment. The determining unit 202 is configured to support the apparatus for determining the transport block size to perform steps S203 and S204 in the above-described embodiment. Optionally, the sending unit 203 is configured to support the apparatus for determining the size of the transport block to execute step S205 in the foregoing embodiment. 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.

As still another possible implementation manner, the obtaining unit 201 in the embodiment of the present application is configured to support the apparatus for determining the transport block size to perform step S302 in the above embodiment. The determining unit 202 is configured to support the means for determining the transport block size to perform steps S303 and S304 in the above-described embodiment. Optionally, the sending unit 203 is configured to support the apparatus for determining the size of the transport block to execute step S305 in the foregoing embodiment. 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.

In the case of an integrated unit, fig. 26 shows a schematic diagram of a possible logical structure of the apparatus for determining a transport block size involved in the above embodiment, where the apparatus for determining a transport block size may be a terminal in the above embodiment or a chip in the above embodiment. The apparatus for determining a transport block size includes: a processing module 212 and a communication module 213. The processing module 212 is configured to control and manage actions of the apparatus for determining the transport block size, for example, the processing module 212 is configured to perform steps of performing message or data processing on the apparatus for determining the transport block size, for example, support the apparatus for determining the transport block size to perform S103 and S104 in the above-described embodiment. The communication module 213 is configured to support the apparatus for determining the transport block size to perform S102 and S105 in the above embodiment. And/or other processes performed by the means for determining a transport block size for the techniques described herein.

Optionally, the means for determining the size of the transport block may further comprise a storage module 211 for storing program codes and data of the means for determining the size of the transport block.

The processing module 212 may be a processor or controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a digital signal processor, a combination of microprocessors, and the like. The communication module 213 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage module 211 may be a memory.

When the processing module 212 is the processor 220, the communication module 213 is the communication interface 230 or the transceiver, and the storage module 211 is the memory 240, the apparatus for determining the size of the transport block according to the present application may be the apparatus shown in fig. 27.

The communication interface 230, one or more (including two) processors 220, and the memory 240 are connected to each other via the bus 210. Bus 210 may be a PCI bus or EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 27, but this is not intended to represent only one bus or type of bus. The memory 240 is used for storing, among other things, program codes and data for the means for determining the transport block size. The communication interface 230 is used to support the apparatus for determining the transport block size to communicate with other devices (e.g., network devices), for example, to support performing S102 and S105. The processor 220 is configured to support means for determining a transport block size to execute the program codes and data stored in the memory 240 to implement S103 and S104 provided herein.

As another possible implementation manner, in the apparatus for determining a transport block size shown in fig. 26, the processing module 212 is configured to support the apparatus for determining a transport block size to perform S203 and S204 in the foregoing embodiment. The communication module 213 is used to support the apparatus for determining the transport block size to execute S202 and S205 in the above embodiment. And/or other processes performed by the means for determining a transport block size for the techniques described herein.

As still another possible implementation manner, in the apparatus for determining a transport block size shown in fig. 26, the processing module 212 is configured to support the apparatus for determining a transport block size to perform S303 and S304 in the foregoing embodiment. The communication module 213 is configured to support the apparatus for determining the transport block size to perform S302 and S305 in the above embodiment. And/or other processes performed by the means for determining a transport block size for the techniques described herein.

As another possible implementation, in the apparatus for determining a transport block size shown in fig. 27, for example, the communication interface 230 supports the apparatus for determining a transport block size to perform S202 and S205. The processor 220 is configured to support the means for determining the transport block size to execute the program codes and data stored in the memory 240 to implement S203 and S204 provided herein.

As still another possible implementation, in the apparatus for determining a transport block size shown in fig. 27, for example, the communication interface 230 supports the apparatus for determining a transport block size to perform S302 and S305. The processor 220 is configured to support means for determining a transport block size to execute the program codes and data stored in the memory 240 to implement S303 and S304 provided herein.

In the case of an integrated unit, fig. 28 shows a schematic diagram of a possible structure of the transmission device in the above embodiment, and the transmission device may be a network device or a chip in the network device. The transmission device includes: a transmitting unit 301 and a receiving unit 302. Wherein, the sending unit 301 is configured to support the transmission apparatus to execute step S101 in the foregoing embodiment. The receiving unit 302 is used to support the data transmission apparatus to execute step S106 in the above embodiment. 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.

As another possible implementation manner, in the transmission apparatus shown in fig. 28, the sending unit 301 is used to support the transmission apparatus to execute step S201 in the above embodiment. The receiving unit 302 is used to support the data transmission apparatus to execute step S206 in the above embodiment. 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.

As still another possible implementation manner, in the transmission apparatus shown in fig. 28, the sending unit 301 is used to support the transmission apparatus to execute step S301 in the above embodiment. The receiving unit 302 is used to support the data transmission apparatus to execute step S306 in the above embodiment. 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.

In the case of using an integrated unit, fig. 29 shows a schematic diagram of a possible logical structure of the transmission apparatus in the above embodiment, and the transmission apparatus may be the network device in the above embodiment, or a chip applied to the network device. The transmission device includes: a processing module 312 and a communication module 313. The processing module 312 is used for controlling and managing the operation of the transmission device, for example, the processing module 312 is used for executing the steps of processing messages or data on the transmission device side. The communication module 313 is used to support the transmission device to execute S101 and S106 in the above embodiments. And/or other processes performed by the transmitting device for the techniques described herein.

Optionally, the transmission device may further comprise a storage module 311 for storing program codes and data of the transmission device.

The processing module 312 may be a processor or controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a digital signal processor, a combination of microprocessors, and the like. The communication module 313 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage module 311 may be a memory.

When the processing module 312 is the processor 320, the communication module 313 is the communication interface 330 or the transceiver, and the storage module 311 is the memory 340, the transmission device according to the present application may be the apparatus shown in fig. 30.

The communication interface 330, one or more (including two) processors 320, and the memory 340 are connected to each other via the bus 310. The bus 310 may be a PCI bus or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 30, but this is not intended to represent only one bus or type of bus. Wherein the memory 340 is used for storing program codes and data of the transmission apparatus. The communication interface 330 is used to support the transmission apparatus to communicate with other devices (e.g., terminals), and the processor 320 is used to support the transmission apparatus to execute the program codes and data stored in the memory 340 to implement S101 and S105 provided by the present application.

As another possible implementation manner, in the transmission apparatus shown in fig. 29, the communication module 213 is used to support the transmission apparatus to execute S201 and S206 in the above embodiment. And/or other processes performed by a transmitting device for use with the techniques described herein.

As still another possible implementation manner, in the transmission apparatus shown in fig. 29, the communication module 213 is configured to support the transmission apparatus to execute S301 and S306 in the above embodiment. And/or other processes performed by a transmitting device for use with the techniques described herein.

As another possible implementation, in the transmission apparatus shown in fig. 30, for example, the communication interface 230 supports the transmission apparatus to perform S201 and S206.

As still another possible implementation, in the apparatus for determining a transport block size shown in fig. 30, for example, the communication interface 230 supports the apparatus for determining a transport block size to perform S301 and S306.

Fig. 31 is a schematic structural diagram of a chip 150 according to an embodiment of the present invention. Chip 150 includes one or more (including two) processors 1510 and interface circuits 1530.

Optionally, the chip 150 further includes a memory 1540, which may include both read-only memory and random access memory, and provides operating instructions and data to the processor 1510. A portion of memory 1540 may also include non-volatile random access memory (NVRAM).

In some embodiments, memory 1540 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:

in the embodiment of the present invention, by calling an operation instruction stored in the memory 1540 (the operation instruction may be stored in an operating system), a corresponding operation is performed.

One possible implementation is: the terminal and the network device use chips with similar structures, and different devices can use different chips to realize respective functions.

The processor 1510 controls the operation of the terminal and the network device, and the processor 1510 may also be referred to as a Central Processing Unit (CPU). Memory 1540 can include both read-only memory and random-access memory, and provides instructions and data to processor 1510. A portion of memory 1540 may also include non-volatile random access memory (NVRAM). For example, in an application where memory 1540, interface circuit 1530 and memory 1540 are coupled together by bus system 1520, where bus system 1520 may include a power bus, control bus, status signal bus, etc. in addition to a data bus. For clarity of illustration, however, the various buses are labeled in FIG. 31 as bus system 1520.

The method disclosed in the above embodiments of the present invention may be applied to the processor 1510 or implemented by the processor 1510. The processor 1510 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 1510. The processor 1510 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1540, and the processor 1510 reads the information in the memory 1540, and performs the steps of the above method in combination with the hardware thereof.

Optionally, the interface circuit 1530 is configured to perform the steps of receiving and transmitting of the terminal and the network device in the embodiments shown in fig. 9, fig. 10, fig. 16, fig. 17, fig. 19, fig. 20, fig. 22, fig. 23, and fig. 24.

Processor 1510 is configured to perform the steps of the terminal and network device processes in the embodiments illustrated in fig. 9, 10, 16, 17, 19, 20, 22, 23, and 24.

In the above embodiments, the instructions stored by the memory for execution by the processor may be implemented in the form of a computer program product. The computer program product may be written in the memory in advance or may be downloaded in the form of software and installed in the memory.

The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, e.g., the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. A computer-readable storage medium may be any available medium that a computer can store or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

In one aspect, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause a terminal or a chip applied in the terminal to perform S102, S103, S104, and S105 in the embodiments. And/or other processes performed by the terminal or chips applied in the terminal for the techniques described herein.

On the other hand, there is provided a computer storage medium having stored therein instructions that, when executed, cause a terminal or a chip applied in the terminal to perform S202, S203, S204, and S205 in the embodiment. And/or other processes performed by the terminal or chips applied in the terminal for the techniques described herein.

In still another aspect, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause a terminal or a chip applied in the terminal to perform S202, S203, S204, and S205 in the embodiment. And/or other processes performed by the terminal or chips applied in the terminal for the techniques described herein.

In one aspect, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause a network device or a chip applied to the network device to perform S101 and S106 in the embodiment. And/or other processes for the techniques described herein that are performed by a network device or chip applied in a network device.

On the other hand, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause a network device or a chip applied in the network device to perform S201 and S206 in the embodiment. And/or other processes for the techniques described herein that are performed by a network device or chip applied in a network device.

In still another aspect, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause a network device or a chip applied in the network device to perform S301 and S306 in the embodiment. And/or other processes for the techniques described herein that are performed by a network device or chip applied in a network device.

The aforementioned readable storage medium may include: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.

In one aspect, a computer program product comprising instructions stored therein, which when executed, cause a terminal or a chip applied in the terminal to perform S102, S103, S104 and S105 in the embodiments is provided. And/or other processes performed by the terminal or chips applied in the terminal for the techniques described herein.

On the other hand, a computer program product is provided, which comprises instructions stored therein, which when executed, cause the terminal or a chip applied in the terminal to perform steps S202, S203, S204 and S205 in the embodiments. And/or other processes performed by the terminal or chips applied in the terminal for the techniques described herein.

In still another aspect, a computer program product comprising instructions stored therein, which when executed, cause a terminal or a chip applied in the terminal to perform S302, S303, S304 and S305 in the embodiments is provided. And/or other processes performed by the terminal or chips applied in the terminal for the techniques described herein.

In one aspect, a computer program product comprising instructions stored therein, when executed, cause a network device or a chip applied in the network device to perform S101 and S106 in the embodiments is provided. And/or other processes for the techniques described herein that are performed by a network device or chip applied in a network device.

In another aspect, a computer program product comprising instructions stored therein, when executed, cause a network device or a chip applied in the network device to perform S201 and S206 in the embodiments is provided. And/or other processes for the techniques described herein that are performed by a network device or chip applied in a network device.

In still another aspect, a computer program product comprising instructions stored therein, when executed, cause a network device or a chip applied in the network device to perform S301 and S306 in the embodiments is provided. And/or other processes for the techniques described herein that are performed by a network device or chip applied in a network device.

In one aspect, a chip is provided, where the chip is applied in a terminal, and the chip includes one or more (including two) processors and an interface circuit, where the interface circuit and the one or more (including two) processors are interconnected through a line, and the processors are configured to execute instructions to perform S102, S103, S104, and S105 in the embodiment. Or perform S302, S303, S304, and S305 in the embodiment. Or perform S202, S203, S204, and S205 in the embodiment. And/or other terminal-performed processes for the techniques described herein.

In another aspect, a chip applied in a network device is provided, where the chip includes one or more (including two) processors and an interface circuit, the interface circuit and the one or more (including two) processors are interconnected by a line, and the processors are configured to execute instructions to perform S101 and S106 in the embodiments. Or to perform S201 and S206 in the embodiment. Or to perform S301 and S306 in the embodiment. And/or other processes performed by a network device for the techniques described herein.

In addition, the present application also provides a communication system, and the data processing system includes an apparatus for determining the size of a transport block as shown in fig. 25 to 27, and a transmission apparatus as shown in fig. 28 to 30.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, 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. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted 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 can comprise one or more data storage devices, such as a server, a data center, etc., that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include such modifications and variations.

Claims

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

the first equipment acquires a parameter index;

the first equipment determines parameter values of a group of parameters corresponding to the parameter index according to the parameter index and a preset mapping relation; wherein the preset mapping relationship comprises: at least one index, and parameter values for a set of parameters associated with each index of the at least one index, the set of parameters including: modulating order, code rate, spreading factor and number of non-orthogonal multiple access (NOMA) multiplexing layers;

the first device determines a transport block size for communication with the second device based on parameter values of a set of parameters corresponding to the parameter index.

2. The method of claim 1, wherein the set of parameters further comprises: the preset mapping relation comprises at least two indexes, and a plurality of indexes related to the same spectral efficiency value exist in the at least two indexes.

3. The method of claim 2, wherein the parameter values of the partial parameters in the set of parameters corresponding to any two or more of the at least two indexes are different.

4. The method according to any of claims 1-3, wherein when the first device uses multiple MIMO spatial layers for transmission, the first device determines the transport block size for communication with the second device according to the parameter values of a set of parameters corresponding to the parameter index, comprising:

and the first equipment determines the size of a transmission block communicated with the second equipment according to the parameter value of the NOMA multiplexing layer number, the parameter value of the modulation order, the parameter value of the code rate and the parameter value of the expansion factor corresponding to the parameter index of each MIMO spatial layer in the multiple MIMO spatial layers, wherein a group of parameters corresponding to different MIMO spatial layers are different.

5. A method of transmission, comprising:

the method comprises the steps that a second device sends a parameter index to a first device, wherein the parameter index is used for the first device to determine parameter values of a group of parameters corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, wherein the group of parameters comprises: modulating order, code rate, spreading factor and number of non-orthogonal multiple access (NOMA) multiplexing layers;

and the second equipment receives the data sent by the first equipment according to the parameter values of a group of parameters corresponding to the parameter index.

6. The transmission method according to claim 5, wherein the set of parameters further comprises: the preset mapping relation comprises at least two indexes, and a plurality of indexes related to the same spectral efficiency value exist in the at least two indexes.

7. The transmission method according to claim 5 or 6, wherein when there are multiple indexes associated with the same spectral efficiency value in the preset mapping relationship and the second device determines that the number of first devices communicating with the second device on the same time-frequency resource is greater than a first threshold, the parameter index is an index with the lowest number of corresponding NOMA multiplexing layers in the multiple indexes.

8. The transmission method according to claim 7, wherein the parameter index is an index with a largest spreading factor among the plurality of indexes when the number of NOMA multiplexing layers corresponding to the plurality of indexes is the same and the number of NOMA multiplexing layers that are the same is the lowest number of NOMA multiplexing layers corresponding to the plurality of indexes.

9. The transmission method according to claim 5 or 6, wherein when there are multiple indexes associated with the same spectral efficiency value in the preset mapping relationship and the second device determines that the number of first devices communicating with the second device on the same time-frequency resource is smaller than a second threshold, the parameter index is an index with the highest number of corresponding NOMA multiplexing layers among the multiple indexes.

10. The transmission method according to claim 9, wherein the parameter index is an index with a largest spreading factor among the plurality of indexes when the number of NOMA multiplexing layers corresponding to the plurality of indexes is the same and the number of NOMA multiplexing layers that is the same is the highest number of NOMA multiplexing layers corresponding to the plurality of parameter indexes.

11. An apparatus for determining a transport block size, the apparatus comprising:

an acquisition unit configured to acquire a parameter index;

the determining unit is used for determining parameter values of a group of parameters corresponding to the parameter index according to the parameter index and a preset mapping relation; wherein the preset mapping relationship comprises: at least one index, and parameter values for a set of parameters associated with each index of the at least one index, the set of parameters including: modulating order, code rate, spreading factor non-orthogonal multiple access and NOMA multiplexing layer number;

the determining unit is further configured to determine a transport block size for communicating with the second device according to parameter values of a set of parameters corresponding to the parameter index.

12. The apparatus of claim 11, wherein the set of parameters further comprises: the preset mapping relation comprises at least two indexes, and a plurality of indexes related to the same spectral efficiency value exist in the at least two indexes.

13. The apparatus of claim 12, wherein the parameter values of the partial parameters in the set of parameters corresponding to any two or more of the at least two indexes are different.

14. The apparatus according to any of claims 11-13, wherein when said apparatus uses multiple MIMO spatial layers for transmission, said determining unit is further configured to:

and determining the size of a transmission block communicated with second equipment according to the parameter value of the NOMA multiplexing layer number, the parameter value of the modulation order, the parameter value of the code rate and the parameter value of the expansion factor corresponding to the parameter index of each MIMO spatial layer in the multiple MIMO spatial layers, wherein a group of parameters corresponding to different MIMO spatial layers are different.

15. A transmission apparatus, characterized in that the transmission apparatus comprises:

the device comprises a sending unit, a receiving unit and a processing unit, wherein the sending unit is used for sending a parameter index to first equipment, and the parameter index is used for the first equipment to determine parameter values of a group of parameters corresponding to the parameter index from a preset mapping relation; the preset mapping relationship comprises at least one index and parameter values of a group of parameters associated with each index in the at least one index, wherein the group of parameters comprises: modulating order, code rate, spreading factor and number of non-orthogonal multiple access (NOMA) multiplexing layers;

and the receiving unit is used for receiving the data sent by the first equipment according to the parameter values of the group of parameters corresponding to the parameter index.

16. The transmission apparatus of claim 15, wherein the set of parameters further comprises: the preset mapping relation comprises at least two indexes, and a plurality of indexes related to the same spectral efficiency value exist in the at least two indexes.

17. The transmission apparatus according to claim 15 or 16, wherein when there are multiple indexes associated with the same spectral efficiency value in the preset mapping relationship and the second device determines that the number of first devices communicating with the second device on the same time-frequency resource is greater than a first threshold, the parameter index is an index with the lowest number of NOMA multiplexing layers corresponding to the multiple indexes.

18. The transmission apparatus as claimed in claim 17, wherein, when the number of NOMA multiplexing layers corresponding to the plurality of indices is the same, and the number of NOMA multiplexing layers that is the same is the lowest number of NOMA multiplexing layers corresponding to the plurality of parameter indices, the parameter index is an index with the largest spreading factor among the plurality of indices.

19. The transmission apparatus according to claim 15 or 16, wherein when there are multiple indexes associated with the same spectral efficiency value in the preset mapping relationship and the second device determines that the number of first devices communicating with the second device on the same time-frequency resource is smaller than a second threshold, the parameter index is an index with the highest number of NOMA multiplexing layers corresponding to the multiple indexes.

20. The transmission apparatus as claimed in claim 19, wherein the parameter index is an index with a largest spreading factor among the plurality of indexes when the number of NOMA multiplexing layers corresponding to the plurality of indexes is the same and the number of NOMA multiplexing layers is the highest number of NOMA multiplexing layers corresponding to the plurality of parameter indexes.

21. A computer-readable storage medium, in which a computer program or instructions are stored which, when run on a computer, cause the computer to carry out a method of determining a transport block size as claimed in any one of claims 1 to 4, or a transport method as claimed in any one of claims 5 to 10.

22. A chip comprising a processor and interface circuitry, the interface circuitry being coupled to the processor, the processor being configured to run a computer program or instructions to implement a method of determining a transport block size as claimed in any one of claims 1 to 4 or a method of transmission as claimed in any one of claims 5 to 10, the interface circuitry being configured to communicate with modules other than the chip.