CN113824481B

CN113824481B - Uplink transmission method, device, chip system and storage medium

Info

Publication number: CN113824481B
Application number: CN202010568927.0A
Authority: CN
Inventors: 王明哲; 纪刘榴; 刘显达; 毕晓艳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2023-03-28
Anticipated expiration: 2040-06-19
Also published as: CN113824481A; WO2021254506A1

Abstract

The application provides an uplink transmission method and a related device. In the method, a terminal device receives precoding indication information from a network device, wherein the precoding indication information is used for indicating M precoding indications, and each precoding indication is associated with one or more frequency domain resources in N frequency domain resources used for transmitting PUSCH. Wherein at least two of the N frequency domain resources are associated with different precoding matrices. Therefore, the method can determine the precoding matrix associated with the N frequency domain resources, thereby being beneficial to obtaining the frequency selection gain and improving the uplink transmission performance. In addition, the application also discloses that the precoding matrixes of the N frequency domain resources are determined by utilizing the M precoding indications in the CB mode or the NCB mode, so that the frequency selection gain is obtained, and meanwhile, the signaling overhead is reduced.

Description

Uplink transmission method, device, chip system and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to an uplink transmission method and a related apparatus.

Background

With the development of communication technology, a wider range of communication application scenarios is supported. There are some communication scenarios that put higher demands on the reliability of communication, for example, the reliability requirement of Ultra Reliable Low Latency (URLLC) reaches 10 ^-5 Errors occur 1 time in even higher order transmissions. A common method is to consider different diversity characteristics of the channels, such as spatial diversity, frequency domain diversity, etc., so that the system utilizes the diversity gain of the low correlation channel to enhance the reliability of the transmission.

However, when performing uplink transmission based on the diversity characteristic of the channel, how to determine the precoding matrix becomes an urgent solution.

Disclosure of Invention

The embodiment of the application provides an uplink transmission method and a related device, which can determine a precoding matrix of a plurality of frequency domain resources for transmitting a physical uplink shared channel.

In a first aspect, the present application provides an uplink transmission method, including: receiving precoding indication information; the precoding indication information is used for indicating M precoding indications, and each precoding indication is associated with one or more frequency domain resources in the N frequency domain resources; the N frequency domain resources are used for transmitting a Physical Uplink Shared Channel (PUSCH). Precoding matrices for the N frequency domain resources may be determined based on the M precoding indications. At least two of the N frequency domain resources are respectively associated with different precoding matrices, and M is greater than or equal to 1 and less than or equal to N. Therefore, the implementation method can determine the precoding matrixes of the plurality of frequency domain resources, so as to obtain the frequency selection gain. The method can be applied to the terminal equipment side, can be executed by the terminal equipment, and can also be executed by a communication device supporting the terminal equipment to realize the functions required by the method, such as a chip or a chip system.

In an optional embodiment, for an uplink transmission mode based on a codebook, the precoding indication information is a transmission precoding matrix indication field in downlink control information, so the precoding indication information is also used for indicating an actual rank number of a terminal device for transmitting a PUSCH; correspondingly, the M precoding indications are M transmission precoding matrix indications or M precoding matrix indications indicated by the transmission precoding matrix indication field.

In another optional implementation manner, for the non-codebook-based uplink transmission mode, the precoding indication information is a sounding reference signal indication field in downlink control information. Optionally, the sounding reference signal indication field is further configured to indicate an actual rank number of the terminal device for transmitting the PUSCH; alternatively, the sounding reference signal indication field is only used for indicating M precoding indications. Accordingly, the M precoding indications are the M sounding reference signal indications indicated by the sounding reference signal indication field.

In yet another alternative embodiment, whether in the codebook-based uplink transmission mode or the non-codebook-based uplink transmission mode, the precoding indication information may be a new field in the downlink control information, which is different from the above-mentioned precoding matrix indication field or the sounding reference signal indication field.

As can be seen, the embodiment can determine the precoding matrix of the N frequency domain resources based on one piece of precoding indication information, and can reduce signaling overhead of downlink control information compared with a mode that the N frequency domain resources require N pieces of precoding indication information.

In an alternative embodiment, M is equal to 1, that is, the precoding indication information is used to indicate a precoding indication; the precoding indication is associated with an odd number of the N frequency domain resources; and the precoding matrix of the even number of frequency domain resources in the N frequency domain resources is obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule. Or, the precoding indication is associated with an even number of the N frequency domain resources; and the precoding matrix of odd frequency domain resources in the N frequency domain resources is obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule.

The N frequency domain resources may be sorted according to the sequence number of each frequency domain resource, so as to obtain N sorted frequency domain resources, and further determine odd-numbered frequency domain resources and even-numbered frequency domain resources of the N frequency domain resources.

In another optional embodiment, M is equal to 1, that is, the precoding indication information is used to indicate a precoding indication; the precoding indication is associated with even numbered ones of the N frequency domain resources; and the pre-coding matrix of the frequency domain resource with the odd serial number in the N frequency domain resources is obtained by transforming the pre-coding matrix indicated by the pre-coding indication by utilizing a predefined rule.

In yet another optional embodiment, M is equal to 1, and the precoding indicator is associated with a top one of the N frequency-domain resources

A frequency domain resource association; post ^ in the N frequency domain resources>

The precoding matrix of each frequency domain resource is obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule.

In an optional embodiment, M is equal to 2, and the precoding indication information is used to indicate a first precoding indication and a second precoding indication; the first precoding indication is associated with an odd number of the N frequency domain resources; the second precoding indication is associated with an even number of the N frequency domain resources.

In another optional embodiment, M is equal to 2, and the precoding indication information is used to indicate a first precoding indication and a second precoding indication; the first precoding indication is associated with a first one of the N frequency domain resources

A frequency domain resource association; the second precoding indication is based on the post ^ precoding of the N frequency domain resources>

The frequency domain resources are associated.

In an optional embodiment, M is equal to N, and the precoding indication information is used to indicate N precoding indications; one precoding indication is associated with one frequency domain resource.

In an optional embodiment, the PUSCH is based on codebook transmission; the precoding matrixes respectively indicated by the M precoding indications belong to the same codebook subset type; or the precoding matrix respectively indicated by the M precoding indications belongs to a precoding matrix corresponding to the maximum coherence capability of the terminal device; or the precoding matrixes respectively indicated by the M precoding indications belong to the same codebook subset type and belong to the precoding matrix corresponding to the maximum coherence capability of the terminal equipment; or the precoding matrixes respectively indicated by the M precoding indications belong to the same codebook subset type. That is, in this embodiment, the precoding matrices respectively indicated by the M precoding indications are restricted to be of the same codebook subset type. Or, the precoding matrix respectively indicated by the M precoding indications is restricted from being selected always according to the maximum coherence capability among multiple coherence types in a codebook subset, wherein the codebook subset is configured for the radio resource management signaling. Therefore, the embodiment reduces the selection range of the precoding matrix, thereby being beneficial to reducing the types of precoding indications required by the precoding indication information, further reducing the number of bits required by the precoding indication information, and reducing the signaling overhead of downlink control information.

In another optional embodiment, the PUSCH is based on non-codebook transmission; the M precoding indications are respectively associated with N frequency domain resources in one transmission layer; alternatively, the M precoding indications are respectively associated with R transmission layers in one frequency domain resource. Therefore, the embodiment is beneficial to expanding the precoding matrix of the sounding reference signal indication domain capable of determining a plurality of frequency domain resources in the downlink control information, thereby being beneficial to obtaining the frequency selection gain.

In a second aspect, the present application further provides an uplink transmission method, including: the network equipment generates precoding indication information; the network equipment sends the precoding indication information; the precoding indication information is used for indicating M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for the terminal equipment to transmit a Physical Uplink Shared Channel (PUSCH); the M is greater than or equal to 1 and less than or equal to the N; said N is greater than or equal to 2; at least two frequency domain resources in the N frequency domain resources are respectively associated with different precoding matrixes. Therefore, the implementation method can determine the precoding matrixes of the plurality of frequency domain resources, so as to obtain the frequency selection gain. The method can be applied to the network equipment side, can be executed by the network equipment, and can also be executed by a communication device, such as a chip or a chip system, which supports the network equipment to realize the functions required by the method.

In the embodiment of the application, in an uplink transmission mode based on a codebook, the precoding indication information is precoding information and a layer number field in downlink control information or a transmission precoding matrix indication field in the downlink control information, so the precoding indication information is also used for indicating an actual rank number of a terminal device for transmitting a PUSCH; correspondingly, the M precoding indications are the M transmission precoding matrix indications indicated by the transmission precoding matrix indication field or the indicated M precoding matrix indications; or, the M precoding indications are M transmission precoding matrix indications indicated by the precoding information and the layer number field or M indicated precoding matrix indications.

For the non-codebook based uplink transmission mode, the precoding indication information is a sounding reference signal indication field in downlink control information. Optionally, the sounding reference signal indication field is further configured to indicate an actual rank number of the terminal device for transmitting the PUSCH; alternatively, the sounding reference signal indication field is only used for indicating M precoding indications. Accordingly, the M precoding indications are the M sounding reference signal indications indicated by the sounding reference signal indication field.

As can be seen, the embodiment can determine the precoding matrix of N frequency domain resources based on one piece of precoding indication information, and can reduce the signaling overhead of downlink control information compared with a mode in which N precoding indication information is required for N frequency domain resources.

In an alternative embodiment, M is equal to 1, and the precoding indication is associated with an odd number of the N frequency domain resources; and the precoding matrix of the even number frequency domain resource in the N frequency domain resources is obtained by transforming the precoding matrix indicated by the precoding indication by utilizing a predefined rule.

In an optional embodiment, M is equal to 1, and the precoding indication is associated with a first one of the N frequency-domain resources

A frequency domain resource association;post ^ in the N frequency domain resources>

In an optional embodiment, M is equal to 2, and the precoding indication information is used to indicate a first precoding indication and a second precoding indication; the first precoding indication is associated with a first one of the N frequency domain resources

The frequency domain resources are associated.

In an optional embodiment, the PUSCH is based on codebook transmission; the precoding matrixes respectively indicated by the M precoding indications belong to the same codebook subset type; or the precoding matrixes respectively indicated by the M precoding indications belong to the precoding matrix corresponding to the maximum coherence capability of the terminal equipment; or the precoding matrixes respectively indicated by the M precoding indications belong to the same codebook subset type and belong to the precoding matrix corresponding to the maximum coherence capability of the terminal equipment. That is, in this embodiment, the precoding matrices respectively indicated by the M precoding indications are restricted to be of the same codebook subset type. Or, the precoding matrix respectively indicated by the M precoding indications is restricted from being selected always according to the maximum coherence capability among multiple coherence types in a codebook subset, wherein the codebook subset is configured for the radio resource management signaling. Therefore, the embodiment reduces the selection range of the precoding matrix, thereby being beneficial to reducing the types of precoding indications required by the precoding indication information, further reducing the number of bits required by the precoding indication information, and reducing the signaling overhead of downlink control information.

In another optional embodiment, the PUSCH is based on non-codebook transmission; the M precoding indications are respectively associated with N frequency domain resources in one transmission layer; alternatively, the M precoding indications are associated with R transmission layers in one frequency domain resource, respectively.

In a third aspect, the present application further provides an uplink transmission method, including: receiving precoding indication information, the precoding indication information being used for indicating T precoding matrix indications, each precoding matrix indication being associated with one or more time domain resources of S time domain resources; the S time domain resources are used for transmitting PUSCH, and the T is greater than or equal to 1 and less than or equal to the S; s is greater than or equal to 2; the method can be applied to the terminal equipment side, can be executed by the terminal equipment, and can also be executed by a communication device supporting the terminal equipment to realize the functions required by the method, such as a chip or a chip system. Furthermore, the terminal device side can determine precoding matrices of the S time domain resources according to the precoding indication information, and since at least two time domain resources of the S time domain resources are respectively associated with different precoding matrices, the uplink transmission performance of the terminal device in the time domain resource aggregation mode is favorably improved. The method can be applied to a time domain resource aggregation transmission mode, that is, the PUSCHs respectively transmitted on the S time domain resources belong to the data of the same version or different versions of the same transmission block.

In a fourth aspect, the present application further provides an uplink transmission method, which is set forth from the perspective of a network device. The method comprises the following steps: the network equipment generates precoding indication information and sends the precoding indication information, wherein the precoding indication information is used for indicating T precoding matrix indications, and each precoding matrix indication is associated with one or more time domain resources in S time domain resources; the S time domain resources are used for transmitting PUSCH, and the T is greater than or equal to 1 and less than or equal to the S; s is greater than or equal to 2. At least two time domain resources in the S time domain resources are respectively associated with different precoding matrixes, so that the uplink transmission performance of the terminal equipment in the time domain resource aggregation mode is ensured. The method can be applied to a time domain resource aggregation transmission mode, that is, the PUSCH transmitted on the S time domain resources respectively belongs to data of the same version or different versions of the same transmission block. The method can be applied to the network equipment side, can be executed by the network equipment, and can also be executed by a communication device, such as a chip or a chip system, which supports the network equipment to realize the functions required by the method.

The uplink transmission method according to the third aspect or the fourth aspect may include, but is not limited to, the following optional embodiments.

In one embodiment, for the codebook-based uplink transmission mode, the precoding indication information is a transmission precoding matrix indication field in the downlink control information, so the precoding indication information is also used for indicating an actual rank number of the terminal device for transmitting the PUSCH; accordingly, the T precoding indications are T transmission precoding matrix indications or T precoding matrix indications indicated by the transmission precoding matrix indication field.

In another embodiment, for the non-codebook based uplink transmission mode, the precoding indication information is a sounding reference signal indication field in downlink control information. Optionally, the sounding reference signal indication field is further configured to indicate an actual rank number of the terminal device for transmitting the PUSCH; alternatively, the sounding reference signal indication field is only used for indicating T precoding indications. Accordingly, the T precoding indications are the T sounding reference signal indications indicated by the sounding reference signal indication field.

As can be seen, the embodiment can determine the precoding matrix of N time domain resources based on one piece of precoding indication information, and can reduce signaling overhead of downlink control information compared with a mode that S precoding indication information is needed for S time domain resources.

In an optional embodiment, T is equal to 1, that is, the precoding indication information is used to indicate a precoding indication; the precoding indication is associated with an odd number of the S time domain resources; and the precoding matrix of the even number of time domain resources in the S time domain resources is obtained by transforming the precoding matrix indicated by the precoding indication by utilizing a predefined rule. Or, the precoding indication is associated with an even number of the S time domain resources; and the precoding matrix of the odd time domain resources in the S time domain resources is obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule.

The terminal device may rank the N time domain resources according to the sequence number of each time domain resource, obtain S ranked time domain resources, and determine odd-numbered time domain resources and even-numbered time domain resources of the S time domain resources.

In another optional embodiment, M is equal to 1, that is, the precoding indication information is used to indicate a precoding indication; the precoding indication is associated with even-numbered time domain resources of the S time domain resources; and the precoding matrix of the time domain resource with the odd serial number in the S time domain resources is obtained by transforming the precoding matrix indicated by the precoding indication by utilizing a predefined rule.

In another optional embodiment, M is equal to 1, and the precoding indicator is associated with a top one of the S time domain resources

Associating time domain resources; post ^ in the S time domain resources>

The precoding matrix of each time domain resource is obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule.

In an optional embodiment, T is equal to 2, and the precoding indication information is used to indicate a first precoding indication and a second precoding indication; the first precoding indication is associated with an odd number of the S time domain resources; the second precoding indication is associated with an even number of the S time domain resources.

In another optional embodiment, T is equal to 2, and the precoding indication information is used to indicate a first precoding indication and a second precoding indication; the first precoding indication is associated with a first one of the S time domain resources

Associating time domain resources; the second precoding indication is based on a ^ after ^ S of the S time domain resources>

The time domain resources are associated.

In an optional embodiment, T is equal to S, and the precoding indication information is used to indicate S precoding indications; one precoding indication is associated with one time domain resource.

In an optional embodiment, the PUSCH is based on codebook transmission; the precoding matrixes respectively indicated by the T precoding indications belong to the same codebook subset type; or, the precoding matrix respectively indicated by the T precoding indications belongs to a precoding matrix corresponding to the maximum coherence capability of the terminal device; or the precoding matrixes respectively indicated by the T precoding indications belong to the same codebook subset type and belong to the precoding matrix corresponding to the maximum coherence capability of the terminal equipment; or the precoding matrixes respectively indicated by the T precoding indications belong to the same codebook subset type. That is, in this embodiment, the precoding matrices respectively indicated by the T precoding indications are restricted to be of the same codebook subset type. Or, the precoding matrix respectively indicated by the T precoding indications is restricted from being selected always according to the maximum coherence capability among multiple coherence types in a codebook subset, where the codebook subset is configured for the radio resource management signaling. Therefore, the embodiment reduces the selection range of the precoding matrix, thereby being beneficial to reducing the types of precoding indications required by the precoding indication information, further reducing the number of bits required by the precoding indication information, and reducing the signaling overhead of downlink control information.

In another optional embodiment, the PUSCH is based on non-codebook transmission; the T precoding indications are respectively associated with S time domain resources in one transmission layer; alternatively, the T precoding indications are respectively associated with R transmission layers in one time domain resource. Therefore, the embodiment is beneficial to expanding the precoding matrix which can determine a plurality of time domain resources in the sounding reference signal indication domain in the downlink control information, thereby being beneficial to obtaining the frequency selection gain.

In a fifth aspect, the present application provides an uplink transmission apparatus, where the uplink transmission apparatus has a function of implementing the method example described in the first aspect, for example, the function of the uplink transmission apparatus may have functions in some or all embodiments in the present application, or may have a function of implementing any embodiment in the present application separately. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In one implementation manner, the uplink transmission device may structurally include a processing unit and a communication unit, where the processing unit is configured to support the uplink transmission device to execute a corresponding function in the foregoing method. The communication unit is used for supporting communication between the uplink transmission device and other equipment. The upstream transmission means may further comprise a memory unit for coupling with the processing unit and the transmitting unit, which stores computer programs and data necessary for the upstream transmission means.

In one embodiment, the uplink transmission apparatus includes:

a communication unit for receiving precoding indication information; the precoding indication information is used for indicating M precoding indications, and each precoding indication is associated with one or more frequency domain resources in the N frequency domain resources; the N frequency domain resources are used for transmitting a physical uplink shared channel;

and the processing unit is used for determining the precoding matrixes of the N frequency domain resources according to the M precoding indications. At least two of the N frequency domain resources are respectively associated with different precoding matrices, and M is greater than or equal to 1 and less than or equal to N.

Therefore, the implementation method can determine the precoding matrixes of the plurality of frequency domain resources, so as to obtain the frequency selection gain.

As an example, the processing unit may be a processor, the communication unit may be a transceiving unit, a transceiver or a communication interface, and the storage unit may be a memory. It will be appreciated that the communication unit may be a transceiver in the apparatus, for example implemented by an antenna, a feeder, a codec etc. in the apparatus, or, if the communication apparatus is a chip provided in a terminal device, the communication unit may be an input/output interface of the chip, for example an input/output circuit, a pin etc.

In another embodiment, the uplink transmission apparatus includes:

a transceiver for receiving precoding indication information; the precoding indication information is used for indicating M precoding indications, and each precoding indication is associated with one or more frequency domain resources in the N frequency domain resources; the N frequency domain resources are used for transmitting a physical uplink shared channel;

and the processor is used for determining the precoding matrixes of the N frequency domain resources according to the M precoding indications. At least two of the N frequency domain resources are respectively associated with different precoding matrices, and M is greater than or equal to 1 and less than or equal to N.

Optionally, the uplink transmission apparatus may further perform any one or more embodiments of the first aspect, and details are not described here.

In a sixth aspect, the present application further provides an uplink transmission apparatus, where the uplink transmission apparatus has a function of implementing the method example described in the second aspect, for example, the function of the uplink transmission apparatus may have functions in some or all embodiments in the present application, or may have a function of separately implementing any embodiment in the present application. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In one embodiment, the uplink transmission device may include a processing unit and a communication unit, where the processing unit is configured to support the uplink transmission device to perform the corresponding functions in the above method. The communication unit is used for supporting communication between the uplink transmission device and other equipment. The upstream transmission means may further comprise a memory unit for coupling with the processing unit and the transmitting unit, which stores computer programs and data necessary for the upstream transmission means.

In one embodiment, the uplink transmission apparatus includes:

a processing unit, configured to generate precoding indication information;

a communication unit configured to transmit precoding indication information; the precoding indication information is used for indicating M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for the terminal equipment to transmit a Physical Uplink Shared Channel (PUSCH); the M is greater than or equal to 1 and less than or equal to the N; said N is greater than or equal to 2; at least two frequency domain resources in the N frequency domain resources are respectively associated with different precoding matrixes.

As an example, the processing unit may be a processor, the communication unit may be a transceiver unit, a transceiver or a communication interface, and the storage unit may be a memory. It will be appreciated that the communication unit may be a transceiver in the apparatus, for example implemented by an antenna, a feeder, a codec, etc. in the apparatus, or, if the communication apparatus is a chip provided in a network device, the communication unit may be an input/output interface of the chip, for example an input/output circuit, a pin, etc.

In another embodiment, the uplink transmission apparatus includes:

a transceiver for transmitting precoding indication information; the precoding indication information is used for indicating M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for the terminal equipment to transmit a Physical Uplink Shared Channel (PUSCH); the M is greater than or equal to 1 and less than or equal to the N; said N is greater than or equal to 2; at least two frequency domain resources in the N frequency domain resources are respectively associated with different precoding matrixes.

Optionally, the uplink transmission device may further perform any one or more embodiments of the second aspect, and details are not described here.

In a seventh aspect, the present application provides an uplink transmission apparatus, where the uplink transmission apparatus has the function of implementing the method example described in the third aspect, for example, the function of the uplink transmission apparatus may have the functions in some or all of the embodiments in the present application, or may have the functions of separately implementing any of the embodiments in the present application. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In one implementation manner, the uplink transmission apparatus may structurally include a processing unit and a communication unit, where the processing unit is configured to support the uplink transmission apparatus to execute corresponding functions in the foregoing method. The communication unit is used for supporting communication between the uplink transmission device and other equipment. The upstream transmission means may further comprise a memory unit for coupling with the processing unit and the transmitting unit, which stores computer programs and data necessary for the upstream transmission means.

In one embodiment, the uplink transmission apparatus includes:

a communication unit for receiving precoding indication information; the precoding indication information is used for indicating T precoding indications, and each precoding indication is associated with one or more time domain resources in S time domain resources; the N time domain resources are used for transmitting a physical uplink shared channel;

and the processing unit is used for determining the precoding matrixes of the S time domain resources according to the T precoding indications. At least two time domain sources in the S time domain resources are respectively associated with different precoding matrixes, and T is greater than or equal to 1 and less than or equal to S.

Therefore, the implementation method can determine the precoding matrixes of the plurality of time domain resources, so as to further improve the transmission performance of the time domain resource aggregation transmission mode.

As an example, the processing unit may be a processor, the communication unit may be a transceiver unit, a transceiver or a communication interface, and the storage unit may be a memory. It will be appreciated that the communication unit may be a transceiver in the apparatus, for example implemented by an antenna, a feeder, a codec etc. in the apparatus, or, if the communication apparatus is a chip provided in a terminal device, the communication unit may be an input/output interface of the chip, for example an input/output circuit, a pin etc.

In another embodiment, the uplink transmission apparatus includes:

a transceiver for receiving precoding indication information; the precoding indication information is used for indicating T precoding indications, and each precoding indication is associated with one or more time domain resources in S time domain resources; the S time domain resources are used for transmitting a physical uplink shared channel;

and the processor is used for determining the precoding matrixes of the S time domain resources according to the T precoding indications. At least two time domain resources in the S time domain resources are respectively associated with different precoding matrices, and M is greater than or equal to 1 and less than or equal to N.

Optionally, the uplink transmission apparatus may further perform any one or more embodiments of the third aspect, and details are not described here.

In an eighth aspect, the present application further provides an uplink transmission apparatus, where the uplink transmission apparatus has a function of implementing the method example described in the fourth aspect, for example, the function of the uplink transmission apparatus may have functions in some or all of the embodiments in the present application, or may have a function of separately implementing any of the embodiments in the present application. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.

In one embodiment, the uplink transmission device includes:

a processing unit, configured to generate precoding indication information;

a communication unit configured to transmit precoding indication information; the precoding indication information is used for indicating T precoding indications; each precoding indication is associated with one or more of the S time domain resources; the S time domain resources are used for terminal equipment to transmit a Physical Uplink Shared Channel (PUSCH); t is greater than or equal to 1 and less than or equal to S; said S is greater than or equal to 2; at least two time domain resources in the S time domain resources are respectively associated with different precoding matrixes.

In another embodiment, the uplink transmission apparatus includes:

a transceiver for transmitting precoding indication information; the precoding indication information is used for indicating T precoding indications; each precoding indication is associated with one or more of the S time domain resources; the S time domain resources are used for terminal equipment to transmit a Physical Uplink Shared Channel (PUSCH); t is greater than or equal to 1 and less than or equal to S; said S is greater than or equal to 2; at least two time domain resources in the S time domain resources are respectively associated with different precoding matrixes.

Optionally, the uplink transmission apparatus may further perform any one or more embodiments of the fourth aspect, and details are not described here.

In a ninth aspect, an embodiment of the present invention provides a computer-readable storage medium, configured to store a computer program, where when the computer program runs in a communication apparatus, the communication apparatus executes the uplink transmission method according to the first aspect.

In a tenth aspect, an embodiment of the present invention provides a computer-readable storage medium, which is used for storing a computer program, when the computer program runs in a communication apparatus, the communication apparatus executes the uplink transmission method according to the second aspect.

In an eleventh aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores a computer program, when the computer program runs in a communication apparatus, the communication apparatus executes the uplink transmission method according to the third aspect.

In a twelfth aspect, an embodiment of the present invention provides a computer-readable storage medium, configured to store a computer program, where when the computer program runs in a communication apparatus, the communication apparatus executes the uplink transmission method described in the fourth aspect.

In a thirteenth aspect, the present application also provides a computer program product comprising a computer program, which when run on a communication apparatus, causes the communication apparatus to perform the uplink transmission method according to the first aspect.

In a fourteenth aspect, the present application further provides a computer program product comprising a computer program, which when run on a communication apparatus, causes the communication apparatus to perform the uplink transmission method according to the second aspect.

In a fifteenth aspect, the present application also provides a computer program product comprising a computer program, which when run on a communication apparatus, causes the communication apparatus to perform the uplink transmission method of the third aspect.

In a sixteenth aspect, the present application also provides a computer program product comprising a computer program, which when run on a communication apparatus, causes the communication apparatus to perform the uplink transmission method of the fourth aspect.

In a seventeenth aspect, the present application provides a chip system, which includes at least one processor and an interface, for enabling a terminal device to implement the functions referred to in the first aspect, for example, to determine or process at least one of data and information referred to in the above method. In one possible design, the chip system further includes a memory for storing computer programs and data necessary for the terminal device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In an eighteenth aspect, the present application provides a chip system, which includes at least one processor and an interface, and is configured to support a network device to implement the functions related to the second aspect, for example, to determine or process at least one of data and information related to the method. In one possible design, the system-on-chip further includes a memory for storing computer programs and data necessary for the network device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In a nineteenth aspect, the present application provides a chip system, which includes at least one processor and an interface, for enabling a terminal device to implement the functions according to the third aspect, for example, to determine or process at least one of data and information related to the method. In one possible design, the chip system further includes a memory for storing computer programs and data necessary for the terminal device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In a twentieth aspect, the present application provides a chip system, which includes at least one processor and an interface, for enabling a network device to implement the functions recited in the fourth aspect, such as determining or processing at least one of data and information recited in the above methods. In one possible design, the system-on-chip further includes a memory for storing computer programs and data necessary for the network device. The chip system may be formed by a chip, or may include a chip and other discrete devices. Alternatively, the chip system of the seventeenth aspect to the twentieth aspect may be formed by one or more chips, and may also include chips and other discrete devices.

Drawings

Fig. 1 is a schematic diagram of an uplink transmission method in a CB mode;

fig. 2 is a diagram of an uplink transmission method in the NCB mode;

FIG. 3 (a) is a schematic communication diagram of an upstream FDM;

FIG. 3 (b) is a communication diagram of JT;

FIG. 4 is a diagram of a slotted aggregate transmission mode;

fig. 5 is a flowchart illustrating an uplink transmission method according to an embodiment of the present application;

fig. 6 is a schematic diagram of an association relationship between N frequency domain resources and a precoding matrix according to an embodiment of the present application;

fig. 7 is another schematic diagram of an association relationship between N frequency domain resources and a precoding matrix provided in an embodiment of the present application;

fig. 8 is another schematic diagram of an association relationship between N frequency domain resources and a precoding matrix provided in an embodiment of the present application;

fig. 9 is another schematic diagram of an association relationship between N frequency domain resources and a precoding matrix provided in an embodiment of the present application;

fig. 10 is a schematic diagram of another uplink transmission method provided in an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device 100 according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a communication device 200 according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication device 300 according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

The following will describe embodiments of the present application, which do not limit the scope and applicability of the claims. Those skilled in the art may adapt the function and arrangement of elements involved in the present application or omit, substitute, or add various procedures or components as appropriate without departing from the scope of the embodiments of the present application.

First, some concepts related to embodiments of the present application are explained.

1. Codebook-based uplink transmission mode

The terminal equipment supports two uplink transmission modes, different uplink transmission modes, and the corresponding uplink transmission methods are different. The two uplink transmission modes are a codebook-based uplink transmission mode (CB) and a non-codebook-based uplink transmission mode (NCB), which are abbreviated as CB mode and NCB mode.

The network device may configure the uplink transmission mode of the terminal device through RRC signaling. For example, when the terminal device receives uplink transmission configuration (ulTxConfig) = 'Codebook (Codebook)' in the RRC signaling, that is, it indicates that the uplink transmission mode of the terminal device is configured as the Codebook-based uplink transmission mode; when the terminal device receives RRC signaling (ulTxConfig) = 'non codebook (NonCodebook)', this means that the uplink transmission mode of the terminal device is configured as the non-codebook based uplink transmission mode.

The uplink transmission method in the CB mode is described below with reference to fig. 1, table 1, and table 2. Referring to fig. 1, fig. 1 is a schematic diagram of a CB-mode uplink transmission method. As shown in fig. 1, the uplink transmission method may include the following steps (1) to (3):

(1) A terminal device sends Sounding Reference Signal (SRS), such as SRS1 and SRS2 shown in fig. 1;

wherein, the SRS resource set related to the high-level parameter "codeBook" has a plurality of SRS resources (resources), and the terminal device may transmit a plurality of SRS according to the SRS resource set; if there is only one SRS resource in the set of SRS resources, the terminal device may send one SRS.

(2) The network equipment measures and obtains the uplink channel state according to the SRS; selecting a proper pre-coding matrix and rank (rank) number of the PUSCH according to the uplink channel state; the network device sends Downlink Control Information (DCI) to the terminal device according to the selected precoding matrix and rank number, where the DCI carries the following parameters: a sounding reference Signal Resource Indicator (SRI) field and a Transmission Precoding Matrix Indicator (TPMI) field;

the SRI field is used to indicate an SRS resource. The SRS resource indicated by the SRI field is N used by the terminal equipment for sending SRS _SRS One of the SRS resources. Accordingly, the number of bits occupied by the SRI may be equal to

For example, as shown in fig. 1, the terminal device respectively transmits SRS1 and SRS2 by using 2 SRS resources, and the number of bits occupied by the SRI may be equal to 1, that is, 1 bit, to indicate one of the 2 SRS resources to the terminal device. And the terminal equipment sends the PUSCH according to the port number of the SRS resource indicated by the SRI. That is, terminal equipment transmits PUSCHThe number of ports is equal to the number of ports of SRS resource indicated by the SRI. Optionally, the SRI is used to indicate N _SRS Index of one of the srsresources in the SRS resources.

Optionally, there is only one SRS resource in the SRS resource set related to the high-level parameter "codeBook", the DCI may not include the SRI information, and the terminal device may directly use the number of ports of the SRS resource in the SRS resource set as the number of ports for transmitting the PUSCH.

The TPMI field is used to indicate a precoding matrix of the PUSCH. When determining the precoding matrix indicated by the TPMI corresponding to the TPMI domain, the terminal device further needs to determine a TPMI table according to the SRI and the Transmission Rank Indicator (TRI) corresponding to the TPMI domain, and as shown in table 2, reads the precoding matrix indicated by the TPMI from the TPMI table. That is, the precoding matrix of the PUSCH is selected from an uplink codebook, and the dimension of the uplink codebook is determined according to the port number of the SRS resource indicated by the SRI and the rank number indicated by the TRI. Here, the rank number indicated by the TRI may also be referred to as a layer number of PUSCH transmission.

Herein, the TPMI field may also be referred to as a precoding information and number of layers (layers) field, and for convenience of description, the TPMI field is taken as an example for relevant description below.

(3) And the terminal equipment determines a precoding matrix (precoder) of the PUSCH and the actual transmission rank number of the PUSCH according to the SRI domain and the TPMI domain carried in the DCI so as to send the PUSCH.

Before the terminal device determines the precoding matrix according to the TPMI domain, it needs to determine a precoding indication information table according to the maximum transmission rank (maxRank) configured by the terminal device and the number of SRS resources indicated by the SRI domain, as shown in table 1. Table 1 is a table of "precoding information and number of layers for 2antenna ports if transmission of precoding matrix is not required and 2 maximum rank number is transmitted" (precoding information and number of layers for 2antenna ports if transmission precoding decoder is disabled and maxrank = 2). Table 1 may be referred to simply as a precoding information table, a precoding indication information table, a Transmission Precoding Matrix Indication (TPMI) information table, or a "precoding information and number of layers" table. The configured maxRank for the terminal device is configured by the network device through Radio Resource Control (RRC) signaling. The number of antenna ports (antenna ports) is equal to the number of ports of SRS resource indicated by the SRI field. As shown in fig. 1, the SRI field in the DCI is equal to 2, which means that the SRI field indicates that the port number of SRS resource is 2, i.e. the number of antenna ports is equal to 2.

Among them, the index (Bit field mapped to index) of the bitmap in table 1 may be simply referred to as the value of the TPMI field. The codebook subset (codebook subset) type is configured by the terminal device. The matrix coherence types to which codebook subset belongs include non-coherent (non coherent), partially coherent and non coherent (partial and non coherent), fully and partially coherent and non coherent (full and partial and non coherent). As shown in table 1, the TPMI field in the DCI requires 4 bits to indicate various possible precoding information, which may be TPMI, and the number of layers.

TABLE 1

Further, assuming that the codebook subset supported by the terminal device is "fully and partially coherent and non-coherent", a column in table 1 may be determined; further, based on the value of the TPMI field in the DCI, as shown in fig. 1, if index of the TPMI field mapping sent by the network device is equal to 5, precoding indication information may be read from table 1 as "1layer, TPMI =4". I.e., TRI (actual rank number of PUSCH transmission) is equal to 1, and one precoding matrix indication TPMI indicated by the precoding indication information is equal to 4.

Further, the terminal device determines a Transmission Precoding Matrix Indication (TPMI) table as shown in table 2 according to the SRI field and the TRI. The values of TPMI read from table 1 correspond to the TPMI index in table 2.

TABLE 2

This table 2 may also be referred to as a precoding indication table, a Precoding Matrix Indicator (PMI) table, or a precoding matrix table. Based on TPMI =4 read from table 1, the precoding matrix corresponding to TPMI =4 can be read from table 2 as

So as shown in fig. 1, the terminal device may ≥based on the precoding matrix>

And transmitting the PUSCH.

Alternatively, if the terminal device determines the Transmission Precoding Matrix Indication (TPMI) table shown in table 3 according to the SRI field and the TRI, that is, the number of ports indicated by the SRI field is equal to 2, and the TRI read from table 1 is equal to 2, the Transmission Precoding Matrix Indication (TPMI) table shown in table 3 may be obtained.

TABLE 3

This table 3 may also be referred to as a precoding indication table, a Precoding Matrix Indicator (PMI) table, or a precoding matrix table. Assuming that TPMI =2 read from table 1, the precoding matrix corresponding to TPMI =2 can be read from table 3 as

The terminal device may be based on the precoding matrix->

And transmitting the PUSCH.

As can be seen, after receiving the precoding indication information sent by the network device, the terminal device also needs to determine a precoding indication information table according to the configured maximum transmission rank number and the SRI indicated port number of the terminal device; further, a precoding indication (i.e., a value of TPMI) and TRI may be read from the precoding indication information table according to the received precoding indication information (i.e., a value of TPMI field); then, the terminal equipment determines a precoding indication table by using the port number indicated by the TRI and the SRI; accordingly, the precoding matrix corresponding to the value of the TPMI is read from the precoding indication table. That is, in the uplink transmission method shown in fig. 1, the precoding indication information is the TPMI field in the DCI; the precoding indication indicated by the precoding indication information is the TPMI corresponding to the value of the TPMI domain.

2. Uplink transmission method based on non-codebook

The uplink transmission method in the NCB mode is different from the uplink transmission method in the CB mode, and the precoding indication in the NCB mode is obtained after the SRI field in the DCI. The uplink transmission method in the NCB mode is described below with reference to fig. 2 and table 4. Referring to fig. 2, fig. 2 is a schematic diagram of an uplink transmission method in the NCB mode. As shown in fig. 2, the uplink transmission method may include the following steps (1) to (4) from left to right in fig. 2:

(1) The network equipment sends a channel state information reference signal (CSI-RS) to the terminal equipment;

wherein the terminal device is configured in the NCB mode, the network device may transmit the CSI-RS.

(2) The terminal equipment receives the CSI-RS and measures to obtain the quality of a downlink channel; calculating to obtain the quality of an uplink channel according to the reciprocity of the channel and the quality of the downlink channel; and designing a plurality of candidate uplink precoding matrices (candidate precoders) according to the uplink channel quality, and transmitting a plurality of SRSs, wherein each SRS corresponds to one precoding matrix. As shown in fig. 2, terminal devices respectively transmit SRS1 to SRS4;

wherein, an association relationship exists between the CSI-RS and the SRS resource. For example, the plurality of CSI-RS are associated with a plurality of SRS resources, such as CSI-RS 1 is associated with SRS resources 1 to 4; or, the CSI-RS 1 is associated with SRS resource 1 and SRS resource 2, and the CSI-RS 2 is associated with SRS resource 3 and SRS resource 4.

Alternatively, there is an association between the CSI-RS and the SRS resource set. For example, CSI-RS 1 is associated with SRS resource 1 to SRS resource 4 from SRS resource set 1, and CSI-RS 2 is associated with SRS resource 1 to SRS resource 4 from SRS resource set 2. Therefore, the terminal equipment can obtain the quality of the downlink channel according to the measurement after the CSI-RS, and sends the SRS using the precoding matrixes through different SRS resources after obtaining the precoding matrixes. Therefore, each SRS transmitted by the terminal device corresponds to one precoding matrix.

(3) The network equipment selects a coder corresponding to the SRS with good receiving effect according to the received plurality of SRSs, and sends the coder to the terminal equipment through the DCI;

(4) And the terminal equipment receives the DCI, selects a corresponding coder and rank number according to the SRI domain in the DCI and transmits the PUSCH.

Wherein, an SRI (SRS resource indicator) field in the DCI is used to indicate an index of an SRS resource corresponding to an uplink precoding matrix selected by the network device; the number of indexes of SRS resource corresponding to the SRI field indicates the actual rank number of PUSCH transmitted by the terminal device, and may also be understood as the number of transport layers (layers).

In addition, before the terminal device determines the SRS resource index corresponding to the uplink precoding matrix selected by the network device according to the SRI (SRS resource indicator) field in the DCI, the terminal device also needs to determine the precoding indication information table according to the maximum transmission rank (L _ max) number configured for the terminal device. The precoding indication information table may also be referred to as an SRI indication table of L _ max for non-codebook based PUSCH transmission, referred to as an SRI information table for short.

As shown in table 4, the terminal device determines the SRI information table shown in table 4 according to the configured transmission L _ max = 3. Wherein, the value of the SRI field corresponds to the index of the bitmap. The terminal equipment also needs to send the number N of SRS resources according to the terminal equipment _SRS One column in table 4 was selected. For example, the N _SRS =4, the terminal device may determine the rightmost column from table 4. Further, if the value of the SRI field is equal to 8, the terminal device may read from table 4 that the corresponding SRI is 1,3, respectively. Thus, the terminal device can determine that the precoding matrix of PUSCH is a precoding matrix whose indexes of SRS resource are 1 and 3, respectively, as shown in fig. 2. Furthermore, the terminal equipment can utilize precoding matrix bursts corresponding to SRS1 and SRS3The PUSCH is transmitted, and since the number of indexes of SRS resource corresponding to the SRI field is 2, the actual rank of PUSCH transmission is equal to 2.

TABLE 4

As can be seen, before the terminal device receives the precoding indication information (SRI field value) sent by the network device, it needs to determine a precoding indication information table according to the configured maximum transmission rank of the terminal device; furthermore, the number N of SRS resources transmitted by the terminal equipment is also required _SRS Selecting one column in a precoding indication information table; therefore, the precoding indication (i.e. SRI) can be read from the column of the precoding indication information table according to the received precoding indication information (i.e. the value of the SRI field), and the TRI is determined according to the number of the values of the SRI, and the precoding matrix indicated by the SRI is used as the precoding matrix of the PUSCH transmission. That is, in the uplink transmission method shown in fig. 2, the precoding indication information is a value of an SRI field in DCI; the precoding indication indicated by the precoding indication information is the SRI corresponding to the value of the SRI field.

It should be noted that, when the network device in the CB mode determines the number of bits required by the SRI field, "N" is used _SRS "is the number of SRS resources configured by RRC signaling by the terminal equipment; n adopted when terminal equipment in NCB mode determines SRI indicated by SRI domain _SRS "is the number of SRS resources transmitted by the terminal device.

Therefore, in both the CB mode and the NCB mode, the terminal device needs to receive the precoding indication information, and further determine the precoding matrix for PUSCH transmission. The difference is that the precoding indication information in the CB mode is a TPMI field in DCI, and the precoding indication information in the NCB mode is an SRI field in DCI. Correspondingly, the precoding indication in CB mode is TPMI and the precoding indication in NCB mode is SRI. Optionally, as described above, the precoding matrix indicator information may also be referred to as transmission precoding matrix indicator information, or precoding information and layer number information; accordingly, the precoding indication may be referred to as a precoding matrix indication, or a transmission precoding matrix indication, etc., and for convenience of description, the precoding indication information and the precoding indication are described as examples below.

In this application, the precoding indication information is used to indicate M precoding indications, where M is greater than or equal to 1. For the CB mode, the precoding indication information is a value of a TPMI field in the DCI, and correspondingly, the M precoding indications indicated by the precoding indication information are M TPMIs corresponding to the value of the TPMI field, and each TPMI indicates one uplink precoding matrix. Among them, TPMI may also be referred to as precoding, precoding matrix. For the NCB mode, the precoding indication information is a value of an SRI field in the DCI, and correspondingly, the M precoding indications are M SRIs corresponding to the value of the SRI field, and each SRI indicates one precoding matrix. It is understood that the SRI domain is only an example, and the indication of the present application can be implemented by multiplexing or adding a new domain to other existing domains. The SRI domain is described below as an example.

3. Frequency Domain Multiplexing (FDM) mode

In order to improve the reliability of PUSCH transmission, transmission may be performed using diversity characteristics and low correlation characteristics of channels in different domains, for example, an uplink Frequency Domain Multiplexing (FDM) mode using the Frequency Domain diversity characteristics of channels. In the uplink FDM mode, at least two of the plurality of frequency domain resources correspond to different precoding matrices.

Referring to fig. 3 (a), fig. 3 (a) is a schematic diagram of uplink FDM communication. As shown in fig. 3 (a), it is assumed that in a two Transmission Reception Point (TRP) scenario, a terminal device transmits one PUSCH, that is, the PUSCH uses 1 Redundancy Version (RV) 0. The PUSCH is transmitted using different precoding matrices on a plurality of Subbands (SBs), respectively. For example, the number of subbands is 2, SB1, SB2; multiple channels independently perform channel estimation to determine an uplink transmission precoding matrix, for example, a precoding matrix P1 is obtained based on a channel [ H1 ]; the precoding matrix P2 is obtained based on the channel [ H2 ]; the terminal device may determine a corresponding relationship between the precoding matrix and the subband according to a decision condition, such as a maximum to interference and noise ratio (Signal to interference and noise ratio), for example, using the precoding matrix P1 at SB1 and using the precoding matrix P2 at SB 2.

Accordingly, as shown in fig. 3 (a), TRP1 and TRP2 receive PUSCH on full bandwidth (e.g., SB1 and SB 2), respectively:

the received signals of TRP1 are:

y1= [ H1] [ P1] x, y2= [ H1] [ P2] x; where y1 is the received signal at SB1 and [ P1] is the precoding matrix at SB 1; y2 is the received signal at SB2, [ P2] is the precoding matrix at SB2; x is a transmission signal of the terminal device; [H1] is a channel between the terminal device and TRP 1;

the received signals of TRP2 are:

y3= [ H2] [ P1] x, y4= [ H2] [ P2] x; where y3 is the received signal at SB1 and [ P1] is the precoding matrix at SB 1; y4 is the received signal at SB2, [ P2] is the precoding matrix at SB2; x is a transmission signal of the terminal device; [H2] is the channel between the terminal device and TRP 2.

Further, the TRP1 performs joint demodulation on the received signals y1 and y2 to obtain soft information (soft information) 1; the TRP2 performs joint demodulation on the received signals y3 and y4 to obtain soft information (soft information) 2. And carrying out merging decoding on the two pieces of soft information to obtain decoded bits.

It can be seen that the uplink FDM mode of multi-station cooperation shown in fig. 3 (a) can obtain frequency selective precoding gain and soft information combining gain, thereby improving the reliability of transmission. The frequency selection precoding gain is that different precoding matrixes are associated by using different frequency domain resources, and the reliability of transmission is improved by using the frequency domain diversity characteristic.

4. Time domain resource aggregation (slot aggregation) transmission mode

The time domain resource aggregation transmission mode utilizes the time domain diversity characteristic of a channel, and improves the reliability of the PUSCH by repeatedly transmitting the PUSCH. For example, the same data is repeatedly transmitted over multiple time domain resources. Since the network device receives data of the same version or different versions of the same Transmission Block (TB) on multiple time domain resources and performs merging processing, the robustness of PUSCH transmission can be improved.

Specifically, it is assumed that the network device schedules the terminal device to respectively send N PUSCHs on N time domain resources, where the N PUSCHs carry data of the same version or different versions of the same transport block TB. The N time domain resources all use configuration information of a first time domain resource with a most advanced time domain position, such as time domain resource configurations of a DMRS port, a precoding matrix, and a PUSCH. Wherein the time domain resource configuration of the PUSCH is used for indicating which symbols in each time domain resource the PUSCH is transmitted on.

The network device may notify, through RRC signaling, whether the terminal device is in the time domain resource aggregation transmission mode, for example, through an aggregation-factor-UL of the RRC signaling. The aggregation-factor-UL has a value range of {1,2,3,4}, where 2, 4, and 8 represent consecutive 2 time domain resources, 4 time domain resources, or 8 time domain resources for aggregating and transmitting PUSCH, and 1 represents not performing the time domain resource aggregation transmission mode. When the aggregation-factor-UL is equal to 1, the terminal equipment does not adopt a time domain resource aggregation transmission method; and when the aggregation-factor-UL is larger than 1, the terminal equipment adopts a time domain resource aggregation transmission mode. In addition, the time domain resource aggregation transmission mode may support PUSCH transmission with a rank number of 1.

Taking a time domain resource as a timeslot as an example, please refer to fig. 4, where fig. 4 is a schematic diagram of a timeslot aggregation transmission mode. As shown in fig. 4, the 4 slots (slots) transmit the same data TB0, assuming that aggregation-factor-UL is equal to 4. Since only the first slot of the 4 slots that are aggregated has the corresponding DCI, the 4 slots all use the configuration information of the DCI in slot0, and the configuration information includes precoding information, such as precoding matrix indication and TRI. That is, in the slot aggregation transmission mode, regardless of the CB mode or the NCB mode, the 4 slots each transmit TB0 using the same precoding matrix.

5. Frequency domain resource, time domain resource

The resources in the communication system are divided into a plurality of sub-carriers in terms of frequency, the sub-carriers can be divided into frequency domain resources with different granularity, and each frequency domain resource has a corresponding serial number. For example, a frequency domain resource may be one or more Resource Blocks (RBs), one or more subcarriers, one or more subbands (subbands, SB), one Resource Block (RB), one Resource Block Group (RBG), or the like. Wherein the number of subcarriers included in one RB is 12.

Wherein, the N frequency domain resources for transmitting the PUSCH are the frequency domain resource range occupied by the scheduled PUSCH. The location, number, etc. of the N frequency domain resources may be indicated by a Frequency Domain Resource Allocation (FDRA) field. For example, the field may adopt a bitmap mode, and divide the whole system bandwidth or a part of the bandwidth BWP by the granularity of the predefined frequency domain resource, where one frequency domain resource corresponds to one bit in the bitmap, a bit 0 in the bitmap indicates that the corresponding frequency domain resource is not scheduled, and a bit 1 in the bitmap indicates that the corresponding frequency domain resource is scheduled. For another example, the FDRA field may also indicate a start position of frequency domain resources occupied by the scheduling data and the number of occupied frequency domain resources.

Resources in a communication system are divided into several symbols, such as several Orthogonal Frequency Division Multiplexing (OFDM) symbols, in terms of time, and the several symbols can be divided into time domain resources with different granularity. For example, one time domain resource may be one or more radio frames, one or more subframes, one or more slots, one or more minislots (mini slots), one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols, one or more discrete fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) symbols, and the like, and may also be a time window consisting of a plurality of frames or subframes, such as a System Information (SI) window.

Wherein, the S time domain resources for transmitting the PUSCH are the time domain resource range occupied by the scheduled PUSCH. The position, number, and which symbols in each time domain resource the PUSCH is transmitted on may be indicated by a Time Domain Resource Allocation (TDRA) field. For example, taking one time domain resource as one slot, the field indicates the position of the slot or subframe occupied by scheduling PUSCH, and may be a relative position based on DCI detection slot or subframe, or an absolute position based on one slot or subframe defined by the system.

6. Joint reception (JT) mode

Joint reception (JT) mode, which utilizes the spatial diversity characteristics of the channel, can improve the reliability of the transmission by increasing the receive aperture.

Referring to fig. 3 (b), fig. 3 (b) is a schematic diagram of a communication scenario of JT. As shown in fig. 3 (b), it is assumed that in the two TRP cooperation scenarios, the terminal device transmits one PUSCH, that is, the PUSCH uses 1 Redundancy Version (RV) 0. The PUSCH uses a wideband precoding matrix P, i.e. the precoding matrix P is based on [ H1; h2] is obtained. Wherein [ H1] is a channel between the terminal device and the TRP 1; [H2] is the channel between the terminal device and TRP 2. That is, the precoding matrix P is obtained by performing joint channel estimation on a plurality of channels, which is equivalent to increasing the receiving aperture, i.e. increasing from one channel receiving aperture Nrx to the receiving space 2Nrx of two channels.

Accordingly, TRP1 and TRP2 jointly receive the received signal y = [ H1; h2 Px, wherein x is a transmission signal corresponding to the PUSCH transmitted by the terminal equipment. Further, the received signal y is demodulated to obtain soft information 1, and the soft information 1 is decoded to obtain decoded bits.

Therefore, in the JT mode, multiple TRP are received jointly, which means that the receive aperture is increased, so that the channel estimation is more accurate, the precoding matrix corresponding to the channel is optimized, and the reliability of transmission is improved.

In order to better understand the uplink transmission method disclosed in the embodiment of the present application, a communication system to which the embodiment of the present application is applicable is described next.

The embodiment of the present application may be applied to the communication system shown in fig. 3 (a) or fig. 3 (b), where the communication system takes TRP1, TPR2 and a terminal device as examples, and the uplink transmission method described in the embodiment of the present application may also be applied to a communication system including one TRP and one terminal device, that is, the embodiment of the present application does not limit the number of network devices and terminal devices in the applied communication system.

In the embodiment of the present application, precoding indication information is mainly described by taking the precoding indication information carried in one piece of downlink control information as an example. Optionally, the M precoding indications respectively indicated by the precoding indication information may be respectively indicated by a plurality of downlink control information, so that the terminal device obtains the M precoding indications. It should be noted that, whether the precoding indication information is carried in one piece of downlink control information or carried in two pieces of downlink control information, each implementation manner of the association relationship between the M precoding indications and the N frequency domain resources described in the embodiment of the present application may be adopted.

The embodiment of the application can be applied to independent networking, namely, communication systems such as a new base station, a backhaul link and a core network deployed in a future network, and can also be applied to various communication systems such as non-independent networking.

For example, the embodiments of the present application may be used in a fifth generation (5 th generation,5 g) system, which may also be referred to as a New Radio (NR) system, or a sixth generation (6 th generation,6 g) system or other future communication systems; or may also be used for device-to-device (D2D) systems, machine-to-machine (M2M) systems, long Term Evolution (LTE) systems, and so on.

In this embodiment, the network device may be a device with a wireless transceiving function or a chip disposed on the device, and the network device includes but is not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a network equipment controller (BSC), a network equipment transceiver station (BTS), a home network equipment (e.g., home evolved Node B or home Node B, HNB), a baseband unit (BBU), an Access Point (AP) in a wireless fidelity (WIFI) system, a wireless relay Node, a wireless backhaul Node, a transmission point (TRP or transmission point, TP), and the like; it may also be a device used in a 5G, 6G or even 7G system, such as a gNB or a transmission point (TRP or TP) in an NR system, an antenna panel or a group (including multiple antenna panels) of network devices in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU, distributed unit), or a piconet network device (Picocell), or a femto network device (Femtocell), or a vehicle networking (vehicle to evolution, V2X), or a Road Side Unit (RSU) in an intelligent driving scenario.

In the embodiment of the present application, the terminal device may include but is not limited to: user Equipment (UE), access terminal equipment, subscriber unit, subscriber station, mobile station, remote terminal equipment, mobile device, user terminal equipment, user agent, or user device, etc. For another example, the terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical treatment (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a wireless terminal in the aforementioned V2X car networking, or an RSU of a wireless terminal type, and so on. In some deployments, the gNB may include a Centralized Unit (CU) and a Distributed Unit (DU). The gNB may also include an Active Antenna Unit (AAU). The CU implements part of the function of the gNB and the DU implements part of the function of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implements functions of a Radio Resource Control (RRC) layer and a Packet Data Convergence Protocol (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or transmitted by the DU and the AAU under this architecture. It is to be understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

It can be understood that the communication system described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation to the technical solution provided in the embodiment of the present application, and as a person having ordinary skill in the art knows, with the evolution of the system architecture and the occurrence 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 JT mode may also be combined with the FDM mode to obtain frequency selective gain, so as to further improve the reliability of transmission. It can be seen that the terminal device needs to determine the precoding matrix no matter in the NCB mode or the CB mode. However, for the uplink FDM joint JT mode, or the uplink FDM mode and other PUSCH transmission enhancement modes, the terminal device needs to determine the precoding matrices of multiple frequency domain resources, and therefore how to determine the precoding matrices of multiple frequency domain resources to obtain the frequency selection gain is an urgent problem to be solved.

In addition, in the time domain resource aggregation transmission mode, if the channel condition changes in multiple aggregated time domain resources or the terminal device moves, when the multiple time domain resources transmit the PUSCH by using one precoding matrix configured by DCI, the demodulation performance may be reduced, and the uplink transmission performance of the terminal device may not be ensured. Therefore, how to improve the transmission performance for this situation is also an urgent problem to be solved.

The application provides an uplink transmission method, in the method, precoding indication information received by terminal equipment can indicate M precoding matrix indications, and each precoding matrix indication is associated with one or more frequency domain resources in N frequency domain resources; the N frequency domain resources are used for transmitting PUSCH, and M is greater than or equal to 1 and less than or equal to N; said N is greater than or equal to 2; furthermore, the terminal device may determine precoding matrices of the N frequency domain resources according to the precoding indication information. Since at least two of the N frequency domain resources are respectively associated with different precoding matrices, the frequency selection gain of PUSCH transmission can be obtained.

In addition, the present application also provides an uplink transmission method, in the method, precoding indication information received by the terminal device may include T precoding matrix indications, each precoding matrix indication being associated with one or more time domain resources of the S time domain resources; the S time domain resources are used for transmitting PUSCH, and the T is greater than or equal to 1 and less than or equal to the S; said S is greater than or equal to 2; furthermore, the terminal device can determine the precoding matrix of the S time domain resources according to the precoding indication information, and at least two time domain resources in the S time domain resources are respectively associated with different precoding matrices, so that the uplink transmission performance of the terminal device in the time domain resource aggregation mode can be ensured.

The uplink transmission method described in the present application is described below with reference to the accompanying drawings.

Referring to fig. 5, fig. 5 is a flowchart illustrating an uplink transmission method according to an embodiment of the present disclosure. As shown in fig. 5, the uplink transmission method includes, but is not limited to, the following steps:

s101, generating precoding indication information by network equipment, wherein the precoding indication information is used for indicating M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for transmitting a Physical Uplink Shared Channel (PUSCH); the M is greater than or equal to 1 and less than or equal to the N; the N is greater than or equal to 2;

s102, the network equipment sends the precoding indication information;

s103, the terminal equipment receives the precoding indication information and determines precoding matrixes of the N frequency domain resources according to the precoding indication information.

Wherein, for the CB mode, the precoding indication information may be the TPMI field in the DCI described above; the precoding indication information is used to indicate M precoding indications, and one precoding indication may be one TPMI corresponding to a value in a TPMI domain in the DCI. For NCB mode, the precoding indication information may be the SRI field in DCI as described above; each precoding indication in the precoding indication information may be an SRI corresponding to a value in an SRI field in the DCI.

In the embodiment of the present application, each precoding indication is associated with one or more frequency domain resources of the N frequency domain resources, and specific association manners include, but are not limited to, the following embodiments 1.1 to 1.3. That is, the embodiment 1.1 to the embodiment 1.3 use the precoding indication information to indicate one, two, or N precoding indications to respectively describe the association relationship between the precoding indication and the frequency domain resource, or the related content of the precoding matrix of the frequency domain resource.

Embodiment 1.1 precoding indication information is used to indicate one precoding indication.

In one case, the precoding indication is associated with an odd number of N frequency domain resources, and a precoding matrix of an even number of the N frequency domain resources is obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule.

That is, M is equal to 1, and as shown in table 1 above, a row corresponding to the value of the TPMI field in the DCI includes one TPMI associated with an odd-numbered frequency domain resource of the N frequency domain resources; the precoding matrix of the even number of the N frequency domain resources is obtained by transforming the precoding matrix indicated by the TPMI by using a predefined rule.

As shown in fig. 6, it is assumed that N frequency domain resources for transmitting PUSCH are 2 SBs, SB1 and SB2, respectively; if the precoding matrix indicated by one TPMI corresponding to the TPMI domain value is PMx, then the 2 SBs are arranged from small to large (or from large to small) according to the sequence numbers of the sub-bands: SB1, SB2, i.e. the first SB is SB1, the second SB is SB2, then the TPMI is associated with SB1, i.e. the precoding matrix of SB1 is PMx; the precoding matrix of SB2 is PMy obtained by transforming PMx using a predefined rule.

As shown in fig. 7, it is assumed that N frequency domain resources for transmitting PUSCH are 4 SBs, SB1 to SB4, respectively; if the precoding matrix indicated by one TPMI corresponding to the value of the TPMI domain is PMx, then the 4 SBs are arranged from small to large (or from large to small) according to the sequence numbers of the sub-bands in sequence: SB1, SB2, SB3, SB4, and correspondingly, the odd numbered SB is SB1, SB3; the even numbers SB are SB2 and SB4. Then, as shown in fig. 7, the TPMI is associated with SB1, SB3, i.e. the precoding matrix of SB1, SB3 is PMx; the precoding matrices of SB2, SB4 are PMy obtained by transforming PMx with a predefined rule.

Optionally, the precoding indication is associated with an even number of frequency domain resources of the N frequency domain resources, and the odd number of frequency domain resources of the N frequency domain resources are obtained by transforming a precoding matrix indicated by the precoding indication by using a predefined rule. The N frequency domain resources may be arranged according to the sequence numbers of the frequency domain resources.

Optionally, the case is described as: the association relationship between the precoding indication and one or more of the N frequency domain resources is comb-shaped (comb), the association relationship between the precoding matrix obtained by transforming the precoding matrix indicated by the precoding indication with a predefined rule and one or more of the N frequency domain resources is also comb-shaped (comb), and the frequency domain resources associated with the precoding indication and the frequency domain resources associated with the precoding matrix are respectively different frequency domain resources (that is, the starting positions of the two comb-shaped resources are different). Wherein, the starting position, the comb density and the comb offset of the two comb teeth can be respectively predefined or configured by signaling.

For example, as shown in fig. 7, the association between the precoding indication and one or more of the 4 frequency domain resources is in a comb shape, that is, the association between the precoding matrix PMx indicated by the precoding indication and one or more of the 4 frequency domain resources is in a comb shape. The initial position of the comb teeth is SB1, the density of the comb teeth is 1 SB, and the offset of the comb teeth is 1 SB; accordingly, the association relationship between PMy obtained by transforming the precoding matrix PMx with the predefined rule and one or more frequency domain resources of the 4 frequency domain resources is in the shape of comb, the starting position of the comb is SB2, the density of comb is 1 SB, and the offset of comb is 1 SB, so that the comb-shaped association relationship between the precoding matrix and SB as shown in fig. 7 can be obtained.

For another example, as shown in fig. 8, the 8 frequency domain resources for transmitting PUSCH are arranged from small to large (or may be arranged from large to small) in sequence as follows: SB1, SB2, SB3, SB4, SB5, SB6, SB7, SB8. The association relationship between the precoding indication and one or more of the 8 frequency domain resources is in a comb shape, that is, the association relationship between the precoding matrix PMx indicated by the precoding indication and one or more of the 8 frequency domain resources is in a comb shape, the starting position of the comb shape is SB1, the comb density is 2 SB, and the comb offset is 2 SB; accordingly, the association relationship between PMy obtained by transforming the precoding matrix PMx by the predefined rule and one or more of the 8 frequency domain resources is in a comb shape, the starting position of the comb shape is SB3, the comb density is 2 SB, and the comb offset is 1 SB, so that the comb-shaped association relationship between the precoding matrix and SB as shown in fig. 8 can be obtained.

Optionally, the association relationship described above is in a comb shape, which may be understood as that the precoding matrices associated with the N frequency domain resources are in a comb shape.

Alternatively, the precoding indication is associated with a top one of the N frequency-domain resources

The precoding matrix of each frequency domain resource is a precoding matrix of the precoding matrix using a predefined ruleThe coding indication is obtained by transforming the indicated pre-coding matrix. Wherein it is present>

Represents rounding up for N/2;

Indicating rounding down for N/2.

That is, M is equal to 1, and as shown in table 1 above, the row corresponding to the value of the TPMI field in the DCI includes one TPMI, which is associated with the first one of the N frequency domain resources

A frequency domain resource association; post &'s in the N frequency domain resources>

The precoding matrix of each frequency domain resource is obtained by transforming the precoding matrix indicated by the TPMI by a predefined rule.

Alternatively, the situation can be described as: the precoding indication and the precoding matrix obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule are respectively in a half-half (half-half) incidence relation with the N frequency domain resources. Or the precoding matrix PMx indicated by the precoding indication and the precoding matrix PMy obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule, wherein frequency domain resources respectively associated with the two precoding matrices are half-half (half-half) in shape.

For example, assume that the N frequency domain resources used for transmitting PUSCH are 2 SBs, SB1 and SB2, respectively; if the precoding matrix indicated by one TPMI corresponding to the value of the TPMI domain is PMx, then the 2 SBs are arranged from small to large (or from large to small) according to the sequence numbers of the sub-bands: SB1, SB2, i.e. the first SB is SB1, the second SB is SB2, then the TPMI is associated with SB1, i.e. the precoding matrix of SB1 is PMx; the precoding matrix of SB2 is PMy obtained by transforming PMx using a predefined rule, as shown in fig. 6.

As shown in fig. 9, it is assumed that N frequency domain resources for transmitting PUSCH are 4 SBs, SB1 to SB4, respectively; if the precoding matrix indicated by one TPMI corresponding to the value of the TPMI domain is PMx, then the 4 SBs are arranged from small to large (or from large to small) according to the sequence numbers of the sub-bands in sequence: SB1, SB2, SB3, SB4, correspondingly, the first 2 SBs are SB1, SB2; the last 2 SB are SB3, SB4. Then, as shown in fig. 8, the TPMI is associated with SB1, SB2, i.e. the precoding matrix of SB1, SB2 is PMx; the precoding matrices of SB3, SB4 are PMy obtained by transforming PMx with a predefined rule.

Among other things, the predefined rules in this embodiment may include, but are not limited to: 1) Phase rotation of a precoding matrix indicated by the precoding indication; 2) Performing phase rotation on matrix values corresponding to different ports or part of ports in a precoding matrix indicated by the precoding indication; 3) A specific matrix is superimposed on the precoding matrix indicated by the precoding indication. For example, PMy is obtained by multiplying matrix values corresponding to different ports or partial ports of PMx by one of the values (i, -1, -j), respectively.

As can be seen, in the embodiment 1.1, under the condition that at least two frequency domain resources in the multiple frequency domain resources are associated with different precoding matrices, the precoding indication information may still use a precoding indication information table similar to that shown in table 1, and an index range corresponding to a value of the precoding indication information may not be changed, so that the terminal device determines multiple precoding matrices according to the precoding indication information using the embodiment 1.1, and can obtain a frequency selection gain while avoiding an overhead increase required by the precoding indication information.

Embodiment 1.2 precoding indication information for indicating two precoding indications

That is, M is equal to 2, and the precoding indication information is used to indicate a first precoding indication and a second precoding indication;

one case, the first precoding indication is associated with an odd number of the N frequency domain resources; the second precoding indication is associated with an even number of the N frequency domain resources.

Optionally, the case is described as: the association relationship between the first precoding indication and one or more of the N frequency domain resources is comb-shaped (comb), the association relationship between the second precoding indication and one or more of the N frequency domain resources is also comb-shaped (comb), and the frequency domain resources associated with the precoding indication and the frequency domain resources associated with the precoding matrix are respectively different frequency domain resources (that is, the starting positions of the two comb-shaped directions are different). Wherein, the starting position, comb density and comb offset of the two comb teeth can be predefined or configured by signaling.

Optionally, the association relationship described above is in a comb shape, which may be understood as that the precoding matrix indicated by the first precoding matrix associated with the N frequency domain resources is in a comb shape; the precoding matrix indicated by the second precoding matrix associated with the N frequency domain resources is in a comb shape. Or, the frequency domain resources associated with the precoding matrix indicated by the first precoding matrix are in a comb shape in the N frequency domain resources; the frequency domain resources associated with the precoding matrix indicated by the second precoding matrix are in a comb shape in the N frequency domain resources.

In another case, the first precoding indication is associated with a first one of the N frequency domain resources

The frequency domain resources are associated.

Optionally, the case is described as: and the incidence relation between the first precoding indication and the N frequency domain resources and the second precoding indication are in a half-half (half-half) shape respectively. Or, the frequency domain resources respectively associated with the precoding matrix PMx indicated by the first precoding indication and the precoding matrix PMy indicated by the second precoding indication are half-half (half-half).

That is, the difference between the two cases and the above embodiment 1.1 is that 2 precoding indications can be included in the precoding indication information, i.e., PMx is the precoding matrix indicated by the first precoding indication and PMy is the precoding matrix indicated by the second precoding indication.

For example, the terminal device determines the precoding indication information table shown in table 5 according to the configured maximum transmission rank number and the port number of SRS resource indicated by the SRI field. In table 5, a precoding indication corresponding to an index x is added, and the index x corresponds to two TPMI. Optionally, the index x is described as: 1layer: TPMI = a, b; or, 1layer: TPMI = a, TPMI = b; or, 1layer: TPMI = a,1layer: TPMI = b. Wherein, the actual rank number of the PUSCH transmission is represented by a numerical value or is the sum of the number of layers of each TPMI.

An entry corresponding to a "Bit field mapped to index" x shown in table 5 is added in the current precoding indication information table to indicate a precoding indication under PUSCH transmission enhancement, i.e. the entry may indicate two precoding indications. The value of x may be an index corresponding to each reserved field.

Optionally, the PUSCH transmission enhanced precoding indication information table may be predefined by protocol, that is, different from the current non-PUSCH transmission enhanced precoding indication information table, each entry in the new PUSCH transmission enhanced precoding indication information table indicates two values of the TPMI.

TABLE 5

For example, the 4 SBs for transmitting PUSCH sequentially have sequence numbers from small to large (which may be arranged from large to small): SB1, SB2, SB3, SB4, the value of the TPMI field in the DCI is x, and the TPMI corresponding to x is TPMI a and TPMI b, respectively, based on the case one described in the above embodiment 1.2, the obtained correlation relationship is:

SB1-TPMI a, SB2-TPMI b, SB3-TPMI a, SB4-TPMI b, or

SB1-TPMI b，SB2-TPMI a，SB3-TPMI b，SB4-TPMI a。

Based on the situation set forth in the above embodiment 1.2, the available correlation is:

SB1-TPMI a, SB2-TPMI a, SB3-TPMI b, SB4-TPMI b, or

SB1-TPMI b，SB2-TPMI b，SB3-TPMI a，SB4-TPMI a。

Further, the terminal device determines the precoding indication table according to the number of SRS resource ports indicated by the TRI and SRI fields in table 5. Assuming that the corresponding entry of the value x of the TPMI field in table 5 is TRI =1 and the number of SRS resource ports indicated by the SRI field is equal to 4, the determined precoding indication table is shown in table 6; further, the terminal device may read the corresponding precoding matrix from table 6 according to TPMI a, TPMI b. Wherein TPMI a and TPMI b are indexes in the TPMI index column.

TABLE 6

It can be seen that, in embodiment 1.2, in the case that at least two frequency domain resources of the multiple frequency domain resources are associated with different precoding matrices, an entry may be added to the current precoding indication information table in the precoding indication information table, where the added entry indicates a precoding indication under PUSCH transmission enhancement, that is, the entries may include two precoding indications. Alternatively, a new precoding indication information table may be predefined for PUSCH transmission enhancements in this embodiment, where each entry may include two precoding indications. Therefore, the frequency selection gain is obtained, and meanwhile, the processing complexity of the terminal equipment is relatively reduced.

Embodiment 1.3M equals N, and the precoding indication information is used to indicate N precoding indications.

That is, in this embodiment, the terminal device may read N precoding indications indicated by the precoding indication information from the precoding indication information table, and one precoding indication is associated with one frequency domain resource, so that precoding matrices of the N frequency domain resources may be obtained.

Optionally, the N precoding indications may be sequentially associated with the N frequency domain resources according to the sequence numbers of the N frequency domain resources.

For example, assume that the N frequency domain resources used for transmitting PUSCH are 2 SBs, SB1 and SB2, respectively; the precoding indication information is used for indicating two precoding indications, namely TPM1 and TPMI2, so that SB1 is associated with TPMI1, and SB2 is associated with TPMI 2; alternatively, SB2 is associated with TPMI1 and SB1 is associated with TPMI 2.

Suppose that the N frequency domain resources for transmitting PUSCH are 4 SBs, SB1, SB2, SB3, SB4 respectively; correspondingly, the precoding indication information is used for indicating four precoding indications, namely TPM1, TPMI2, TPMI3, and TPMI4, so that it can be known that SB1 is associated with TPMI1, SB2 is associated with TPMI2, SB3 is associated with TPMI3, and SB4 is associated with TPMI 4; alternatively, SB4 is associated with TPMI1, SB3 is associated with TPMI2, SB2 is associated with TPMI3, and SB1 is associated with TPMI 4.

That is, in embodiment 1.1 and embodiment 1.2, the number of precoding indications corresponding to precoding indication information in the precoding indication information table is independent of the number of frequency domain resources used for transmitting PUSCH. In embodiment 1.3, the number of precoding indications corresponding to the precoding indication information in the precoding indication information table is equal to the number of frequency domain resources for transmitting PUSCH. For example, as in table 5, when N equals 2, x corresponds to two TPMI; if N is equal to 4, x in table 5 needs to correspond to 4 TPMI, thereby being respectively associated with 4 frequency domain resources.

Therefore, in this embodiment, the terminal device may directly obtain the precoding matrices of the N frequency domain resources according to the N precoding indications indicated by the precoding indication information, so that the processing complexity of the terminal device is reduced while the PUSCH transmission obtains the frequency selection gain.

In addition, in the above embodiments 1.1 to 1.3, the DCI carries one piece of precoding indication information, that is, M precoding indications can be obtained to determine precoding matrices of N frequency domain resources. That is, one piece of precoding indication information may be carried in the DCI, and based on the precoding indication information, corresponding 1,2, and N precoding indications may be obtained from the precoding indication information table. Compared with a mode that a plurality of precoding indication information needs to be carried in DCI, and one precoding indication indicated by each piece of precoding indication information is associated with one frequency domain resource, that is, the DCI needs to carry values of two indices in table 1 to obtain two precoding indications, the methods described in the foregoing embodiments 1.1 to 1.3 can reduce overhead of downlink control information.

In addition, in the embodiments 1.1 and 1.2, the precoding matrix of a part of the frequency domain resources is obtained by a predefined rule, and compared with the method in which the precoding matrix of each frequency domain resource is directly obtained in the embodiment 1.3, the performance can be ensured as much as possible without increasing signaling overhead.

In an optional embodiment, the precoding matrices respectively indicated by the M precoding indications belong to the same codebook subset type; or,

the precoding matrix respectively indicated by the M precoding indications belongs to the precoding matrix corresponding to the maximum coherence capability of the terminal equipment; or,

the precoding matrixes respectively indicated by the M precoding indications belong to the same codebook subset type and belong to precoding matrixes corresponding to the maximum coherence capability of the terminal equipment; or,

the precoding matrix respectively indicated by the M precoding indications belongs to a predefined codebook subset type.

That is, this embodiment defines the number of TPMI required to be indicated per index in the precoding indication information table. For example, in table 6, only one non-zero value exists in the precoding matrices whose TPMI index is 0 to 3, and the matrix coherence type to which the precoding matrices whose TPMI index is 0 to 3 belong is non-coherent; the TPMI index is 4 to 7, the precoding matrixes from 8 to 11 have two nonzero values, and the matrix coherence type of the precoding matrixes from 4 to 11 is partial coherence; all the precoding matrices with the TPMI indexes of 12 to 27 are nonzero values, and the matrix coherence types to which the precoding matrices with the TPMI indexes of 12 to 27 belong are all coherent. Therefore, the embodiment limits the matrix coherence type of the precoding matrix respectively indicated by the M precoding indications, and the number of bits required for the precoding indications can indicate part of the precoding matrices in table 6, and further, the number of bits required for the precoding indication information in the precoding indication information table is relatively reduced, thereby being beneficial to reducing signaling overhead.

For example, in the above embodiment 1.2 as an example, the precoding indication information is used to indicate two precoding indications, and the number of possible combinations that the precoding indication information needs to correspond to is as follows for all precoding matrices in table 6

If the embodiment is adopted, the matrix coherence type of the precoding matrix respectively indicated by the two precoding indications is defined as incoherent, the precoding indication information needs to be correspondingly combined in a number & ->

Therefore, the implementation method can greatly reduce the bit number required by the precoding indication information, thereby reducing the overhead of DCI.

In this embodiment, the network device may configure a matrix coherence type of a codebook subset (codebook subset) for the terminal device through RRC signaling, that is, the matrix coherence types to which the precoding matrices respectively indicated by the M precoding indications belong.

If the codebook subset is equal to fullyandpartialandncounerent, it indicates that the terminal device needs to determine precoding matrices corresponding to the M precoding indications respectively from precoding matrices of all matrix coherence types. For example, if codebook subset is equal to partial anti dnoncode, the terminal device determines precoding matrices corresponding to M precoding indicators from the partial precoding matrices shown in table 6, for example, precoding matrices corresponding to TPMI indexes from 0 to 11.

If the codebook subset is equal to the partial anti dnoncode, it indicates that the terminal device needs to determine precoding matrices corresponding to the M precoding indications respectively from precoding matrices whose matrix coherence types are partial coherence and non-coherence. For example, if the codebook subset is equal to the partial precoding index, the terminal device determines precoding matrices corresponding to M precoding indicators from the partial precoding matrices shown in table 6, for example, precoding matrices corresponding to TPMI indexes from 0 to 11.

If the codebook subset is equal to the NonCoherent, it indicates that the terminal device needs to determine precoding matrices respectively corresponding to the M precoding indications from the precoding matrices whose matrix coherence type is incoherent. For example, if codebook subset is equal to nocoherenent, the terminal device determines precoding matrices corresponding to M precoding indicators from the precoding matrices corresponding to the partial precoding matrices shown in table 6, for example, precoding matrices corresponding to TPMI indexes of 0 to 3.

Embodiments 1.1 to 1.3 above mainly use the CB mode as an example for explanation, and alternatively, the embodiments described in embodiments 1.3 to 1.3 above can also be applied to the NCB mode. Wherein the precoding indication information is used to indicate M precoding indications, each precoding indication is associated with one or more of the N frequency domain resources, and the association has two interpretation rules in the NCB mode:

the interpretation rule 2.1 is that the association relationship is the association relationship between N frequency domain resources on one layer and M precoding indications, so if the rank number of the PUSCH transmitted by the terminal device is greater than 1, the association relationship between the N frequency domain resources on each layer and the M precoding indications needs to be included, that is, the entry corresponding to the SRI field value should include the M precoding indications on each layer.

And (2) reading a rule 2.2, wherein the association relationship is the association relationship between the N frequency domain resources and the M precoding indications, and the rank number of the PUSCH transmitted by the terminal equipment is indicated to the terminal equipment by the network equipment through other parameters.

In the following, embodiments of determining precoding matrices of N frequency domain resources in the NCB mode are explained by combining the above two interpretation rules with the above three embodiments, which include, but are not limited to, the following embodiments 3.1 to 3.3.

Embodiment 3.1 precoding indication information is used to indicate one precoding indication.

Based on the interpretation rule 2.1, the precoding indication indicated by the precoding indication information is an SRI; the precoding matrix used by the SRS resource indicated by the SRI is a precoding matrix of one or more of the N frequency domain resources on one layer, that is, the SRI is associated with one or more of the N frequency domain resources on one layer.

That is to say, the precoding indication indicated by the precoding indication information is an SRI on one layer in an entry corresponding to the value of the SRI field, each layer corresponds to one SRI, and the number of SRIs included in the entry is the actual rank number of the terminal device for transmitting PUSCH.

For example, the terminal equipment transmits rank number N according to the maximum configured transmission rank number _SRS And the value of SRI field in DCI, including SRI0, SRI1 from the entries similar to those determined in table 4, then the actual rank number representing the terminal device transmitting PUSCH is equal to 2, and:

odd frequency domain resources, even frequency domain resources and before in the N frequency domain resources on SRI0 and layer 1 corresponding to layer 1

Individual frequency domain resource, or post->

A frequency domain resource is associated, that is, the precoding matrix PMx1 indicated by the SRI0 is the odd number of frequency domain resources, the second even number of frequency domain resources and the previous even number of frequency domain resources in the N frequency domain resources on the layer 1

Individual frequency domain resource, or post->

A precoding matrix of the frequency domain resources; correspondingly, a precoding matrix PMy1 obtained by transforming the precoding matrix PMx according to the predefined rule is a precoding matrix of other frequency domain resources in the N frequency domain resources on layer 1; />

Odd frequency domain resources, even frequency domain resources and before in the N frequency domain resources on the SRI1 and layer 2 corresponding to the layer 2

Individual frequency domain resource, or post->

A frequency domain resource is associated, that is, the precoding matrix PMx2 indicated by the SRI1 is the odd number of frequency domain resources, the even number of frequency domain resources, and the front of the N frequency domain resources on the layer 2

Individual frequency domain resource, or post->

A precoding matrix of the frequency domain resources; correspondingly, the precoding matrix PMy2 obtained by transforming the precoding matrix PMx2 by the predefined rule is the precoding matrix of the other frequency domain resources in the N frequency domain resources on layer 2.

Based on the interpretation rule 2.2, the precoding indication indicated by the precoding indication information is an SRI; the precoding matrix used by the SRS resource indicated by the SRI is a precoding matrix of one or more of the N frequency domain resources, i.e., the SRI is associated with one or more of the N frequency domain resources. That is, the precoding indication indicated by the precoding indication information is that an entry corresponding to the value of the SRI field includes one SRI.

For example, the terminal equipment transmits the rank number N according to the configured maximum transmission rank number _SRS And the value of the SRI field in the DCI, including SRI0 from the entry determined similarly to table 4, indicates that SRI0 and the odd-numbered frequency domain resources, the even-numbered frequency domain resources, and the first of the N frequency domain resources are the first to the odd-numbered frequency domain resources

Individual frequency domain resource, or post->

A precoding matrix PMx1 indicated by the SRI0 is odd number of frequency domain resources, second even number of frequency domain resources, and is early/late/in N frequency domain resources>

Individual frequency domain resource, or post->

A precoding matrix of the frequency domain resources; correspondingly, the precoding matrix PMy1 obtained by transforming the precoding matrix PMx by the predefined rule is a precoding matrix of the other frequency domain resources in the N frequency domain resources.

Optionally, the above association relationship may also be described as comb-shaped (comb), and the start position, the comb density, and the comb offset of the comb-shaped may be predefined or configured by signaling. The above-mentioned correlation is half-half (half-half). For related description, reference may be made to the above embodiment 1.1, for example, the association modes shown in fig. 6 to fig. 9, and details thereof are not described here.

Embodiment 3.2 precoding indication information is used to indicate two precoding indications.

Based on the interpretation rule 2.1, two precoding indications indicated by the precoding indication information are a first SRI and a second SRI; the precoding matrices respectively indicated by the two SRIs are associated with the precoding matrices of the N frequency domain resources on one layer, that is, the two SRIs are associated with the N frequency domain resources on one layer.

That is, the two precoding indications indicated by the precoding indication information are SRIs on one layer in entries corresponding to the values of the SRI field, each layer corresponds to two SRIs, and the number of SRIs included in the entry divided by 2 is equal to the actual rank number of the terminal device for transmitting PUSCH.

For example, the terminal device transmits SRS resource according to the configured maximum transmission rank number and the number N of the terminal device _SRS A precoding indication information table as shown in table 7 is determined. In Table 7, the values of x, y, and z are smaller than N in the corresponding column _SRS 。

TABLE 7

Assuming terminal device configuration N _SRS Equal to 2, the value of the SRI field in the DCI is equal to 2, and N is equal to 2, then one row can be determined from Table 7The entries are 0,1, x, y, abbreviated as SRI0, SRI1, SRIx and SRIy, and based on the interpretation rule 2.1 and the embodiment 3.2, the rank number actually transmitted by the terminal device is equal to 2, and the association relationship shown in the following table 8 can be obtained:

TABLE 8

	Layer 0	Layer 1
			SB 1	SRI0	SRIx
SB
	2	SRI1	SRIy

Or the association shown in table 9 below may be obtained:

TABLE 9

	Layer 0	Layer 1
			SB 1	SRI0	SRI1
SB
	2	SRIx	SRIy

Optionally, when the terminal device interprets the entries SRI0, SRI1, SRIx, and SRIy, if the SRI associated with N frequency domain resources on each layer is predefined, then the SRI associated with each frequency domain resource in each layer is determined, that is, the first two SRIs are SRIs associated with two SBs in one layer 0, and the second two SRIs are SRIs associated with two SBs in layer 1, and then the SRI associated with each SB is determined for each layer, so that the association relationship shown in table 8 can be obtained.

Optionally, when the terminal device interprets the entries SRI0, SRI1, SRIx, and SRIy, if the SRI associated with two layers on each frequency domain resource is predefined, and then the SRI associated with each layer in each frequency domain resource is determined, that is, the first two SRIs are SRIs associated with two layers in SB1, and the second two SRIs are SRIs associated with two layers in SB2, and then the SRI associated with each SB is determined for each SB, the association relationship shown in table 9 may be obtained.

For example, the N frequency domain resources for transmitting PUSCH are SB1 to SB4, and the entries determined based on the values of the SRI domain are SRI0, SRI1, SRIx, and SRIy; if the SRIs associated with the 4 frequency domain resources on each layer are predefined to be determined first, and then the SRIs associated with each frequency domain resource in each layer are determined, where the association relationship between the SRIs on each layer and the 4 frequency domain resources is comb-shaped or half-shape, the association relationship shown in table 10 or the association relationship shown in table 11 can be obtained:

watch 10

	Layer 0	Layer 1
			SB 1	SRI0	SRIx
SB
	2	SRI1	SRIy
SB
	3	SRI0	SRIx
SB
	4	SRI1	SRIy

TABLE 11

	Layer 0	Layer 1
			SB 1	SRI0	SRIx
SB
	2	SRI0	SRIx
SB
	3	SRI1	SRIy
SB
	4	SRI1	SRIy

For another example, the N frequency domain resources for transmitting PUSCH are SB1 to SB4, and the entries determined based on the values of the SRI domain are SRI0, SRI1, SRIx, and SRIy; if it is predefined to determine the SRIs associated with two layers on each frequency domain resource first, and then determine the SRIs associated with each layer in each frequency domain resource, where the association between the SRIs associated with two layers and 4 frequency domain resources is comb-like or half-like, the association relationship shown in table 12 or the association relationship shown in table 13 can be obtained:

TABLE 12

	Layer 0	Layer 1
			SB 1	SRI0	SRI1
SB
	2	SRIx	SRIy
SB
	3	SRI0	SRI1
SB
	4	SRIx	SRIy

Watch 13

	Layer 0	Layer 1
			SB 1	SRI0	SRI1
SB
	2	SRI0	SRI1
SB
	3	SRIx	SRIy
SB
	4	SRIx	SRIy

Based on the interpretation rule 2.2, the two precoding indications indicated by the precoding indication information are a first SRI and a second SRI; the precoding matrices respectively indicated by the two SRIs are precoding matrices of N frequency domain resources, that is, the two SRIs are associated with the N frequency domain resources.

For example, assume terminal device configured N _SRS Equal to 2, the value of the SRI field in the dci is equal to 0, and N is equal to 2, then it can be determined from table 7 that the entries of a row are 0, x, SRI0, SRIx, and based on the interpretation rule 2.2 and this embodiment 3.2, the association shown in table 14 or table 15 below can be obtained:

TABLE 14

SB 1	SRI0
		SB
2	SRIx

Watch 15

SB 1	SRIx
		SB
2	SRI0

Optionally, the above association relationship may also be described as comb-shaped (comb), and the start position, the comb density, and the comb offset of the comb-shaped may be predefined or configured by signaling. The above-mentioned correlation is half-half (half-half) shaped. For a description, reference is made to the above-mentioned embodiment 1.2, which is not described in detail here.

For example, the N frequency domain resources for transmitting PUSCH are SB1 to SB4, and the entries determined based on the value of the SRI domain are 0, x, abbreviated as SRI0, SRIx; if the association between each SRI and the N frequency domain resources is comb-like or half-like, the association shown in table 16, or the association shown in table 17, or the association shown in table 18, or the association shown in table 19 can be obtained:

TABLE 16

SB 1	SRI0
		SB
2	SRIx
		SB
3	SRI0
		SB
4	SRIx

TABLE 17

SB 1	SRIx
		SB
2	SRI0
		SB
3	SRIx
		SB
4	SRI0

Watch 18

SB 1	SRI0
		SB
2	SRI0
		SB
3	SRIx
		SB
4	SRIx

Watch 19

SB 1	SRIx
		SB
2	SRIx
		SB
3	SRI0
		SB
4	SRI0

Embodiment 3.3 the precoding indication information comprises N precoding indications.

Based on the interpretation rule 2.1, the precoding matrices respectively indicated by the N precoding indications indicated by the precoding indication information are precoding matrices of N frequency domain resources on one layer, that is, the N SRIs are associated with the N frequency domain resources on one layer.

That is, the N precoding indications indicated by the precoding indication information are SRIs on one layer in entries corresponding to the values of the SRI field, each layer corresponds to N SRIs, and the number of SRIs included in the entry divided by N is equal to the actual rank number of the PUSCH transmitted by the terminal device.

For example, assume terminal device configured N _SRS Equal to 3, the value of the SRI field in the dci is equal to 6, and N is equal to 3, it can be determined from table 7 that the entries of one row are 0,1,2, x, y, z, abbreviated as SRI0, SRI1, SRI2, SRIx, SRIy, and SRIz, based on the interpretation rule 2.1 and this embodiment 3.3, the rank number actually transmitted by the terminal device is equal to 2, and it is predefined to determine the SRI of N frequency domain resource associations on each layer, and then determine the SRI of each frequency domain resource association in each layer, the association relationship as shown in table 20 below can be obtained:

watch 20

	Layer 0	Layer 1
			SB 1	SRI0	SRIx
SB
	2	SRI1	SRIy
SB
	3	SRI2	SRIz

If the SRIs associated with two layers on each frequency domain resource are predefined to be determined first, and then the SRIs associated with each layer in each frequency domain resource are determined, the association relationship shown in the following table 21 can be obtained:

TABLE 21

	Layer 0	Layer 1
			SB 1	SRI0	SRI1
SB
	2	SRI2	SRIx
SB
	3	SRIy	SRIz

Based on the interpretation rule 2.2, the N precoding indications indicated by the precoding indication information respectively indicate precoding matrices and precoding matrices of N frequency domain resources, that is, the N SRIs are respectively associated with the N frequency domain resources.

For example, assume terminal device configured N _SRS Equal to 3, the value of the SRI field in the dci is equal to 3, and N is equal to 4, it can be determined from table 7 that the entries of one row are 0,1,2, x, y, z, abbreviated as SRI0, SRI1, SRIx, and SRIy, and based on the interpretation rule 2.2 and this embodiment 3.3, the association shown in table 22 or table 23 below can be obtained:

TABLE 22

SB 1	SRI0
		SB
2	SRI1
		SB
3	SRIx
		SB
4	SRIy

TABLE 23

Optionally, the above description is made for the uplink transmission method in the uplink FDM mode, CB mode, or NCB mode. In addition, the uplink transmission method can also be applied to a communication scenario of joint reception, that is, at least two frequency domain resources in the N frequency domain resources used for transmitting the PUSCH are associated with different precoding matrices, for example, the precoding matrices of the N frequency domain resources are determined by the CB mode shown in the above embodiment 1.1 to embodiment 1.3, or the precoding matrices of the N frequency domain resources are determined by the NCB mode shown in the above embodiment 3.1 to embodiment 3.2, so that not only a frequency selection gain can be obtained in an uplink transmission process, but also a reception aperture can be increased, and transmission performance can be improved.

In addition, the present application also provides an uplink transmission method, which can be applied to a time domain resource aggregation transmission mode, and the method includes: the precoding indication information received by the terminal device may include T precoding matrix indications, each precoding matrix indication being associated with one or more time domain resources of the S time domain resources; the S time domain resources are used for transmitting PUSCH, and the T is greater than or equal to 1 and less than or equal to the S; said S is greater than or equal to 2; furthermore, the terminal device may determine precoding matrices of S time domain resources according to the precoding indication information, and since at least two time domain resources of the S time domain resources are respectively associated with different precoding matrices, it is beneficial to ensure uplink transmission performance of the terminal device in a time domain resource aggregation mode.

Referring to fig. 10, fig. 10 is a communication schematic diagram of another uplink transmission method according to an embodiment of the present application. As shown in fig. 10, a signal x1 transmitted by a terminal device on a time unit t1 is data of RV0 version of PUSCH; the signal x2 transmitted by the terminal device in time unit t2 is the data of the RV1 version of PUSCH. The terminal equipment transmits x1 by adopting a precoding matrix P1 in a time unit t 1; the terminal equipment transmits x2 by adopting a precoding matrix P2 in a time unit t 2; wherein the precoding matrix P1 and the precoding matrix P2 are obtained based on the channel [ H1] and the channel [ H2], respectively. Channel [ H1] and channel [ H2] are obtained using independent channel estimates, respectively.

Accordingly, as shown in fig. 10, the reception signal of TRP 1:

t1：y1＝H1P1x1；

t2：y2＝H1P2x2；

reception signal of TRP 2:

t1：y3＝H2P1x1；

t2：y4＝H2P2x2；

the received signals y1 to y4 are demodulated to obtain four soft information: soft info 1 to Soft info 4, the four Soft information uses different RV versions, so that after decoding and combination, decoded bits (Decodedbits) are obtained.

The time unit t1 and the time unit t2 may be a time slot or a micro time slot, and the application is not limited thereto.

Therefore, in the time domain resource aggregation mode, the terminal equipment adopts different precoding matrixes in different time units, so that uplink transmission can obtain soft information combination gain and is beneficial to improving transmission performance.

In the uplink transmission method, the precoding indication information is used to indicate T precoding matrix indicators, each precoding matrix indicator is associated with one or more time domain resources of S time domain resources, and embodiments in which association relationships between the T precoding matrix indicators and the S time domain resources are possible are similar to the embodiments in the CB mode and similar to the embodiments in the NCB mode, except that frequency domain resources in the embodiments are replaced with time domain resources, which is not described in detail herein.

In the embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspective of the terminal device and the network device, respectively. In order to implement the functions in the method provided by the embodiment of the present application, the terminal device and the network device may include a hardware structure and a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Some of the above functions may be implemented by a hardware structure, a software module, or a hardware structure plus a software module. The communication apparatus according to the embodiment of the present application will be described in detail below with reference to fig. 11 to 14. The communication device is a terminal device or a network device, and further, the communication device may be a device in the terminal device or the network device.

Fig. 11 shows a schematic block diagram of a communication apparatus 100, the communication apparatus 100 may perform the operations related to the terminal device in the above method embodiments, and the communication apparatus 100 includes but is not limited to:

a transceiving unit 102, configured to receive precoding indication information; the precoding indication information is used for indicating M precoding indications, and each precoding indication is associated with one or more frequency domain resources in N frequency domain resources; the N frequency domain resources are used for transmitting a physical uplink shared channel.

A processing unit 101, configured to determine precoding matrices of N frequency domain resources according to the M precoding indications. At least two of the N frequency domain resources are respectively associated with different precoding matrices, and M is greater than or equal to 1 and less than or equal to N.

In one embodiment, for the codebook-based uplink transmission mode, the precoding indication information is a transmission precoding matrix indication field in the downlink control information, so the precoding indication information is also used for indicating an actual rank number of the terminal device for transmitting the PUSCH; correspondingly, the M precoding indications are M transmission precoding matrix indications or M precoding matrix indications indicated by the transmission precoding matrix indication field.

For the related implementation of determining the precoding matrices of the N frequency domain resources according to the M precoding indications, reference may be made to implementation 1.1 to implementation 1.3 in the foregoing method embodiments, and for the related implementation of the precoding matrices indicated by the M precoding indications belonging to the same codebook subset type, which is not described in detail herein.

In another embodiment, for the non-codebook based uplink transmission mode, the precoding indication information is a sounding reference signal indication field in downlink control information. Optionally, the sounding reference signal indication field is further configured to indicate an actual rank number of the terminal device for transmitting the PUSCH; alternatively, the sounding reference signal indication field is only used for indicating M precoding indications. Accordingly, the M precoding indications are the M sounding reference signal indications indicated by the sounding reference signal indication field.

For related embodiments of the communication device determining the precoding matrix of the N frequency domain resources according to the M precoding indications, reference may be made to embodiments 2.1 to 2.3 and related descriptions of embodiments 3.1 to 3.3 in the above method embodiments, and details are not described here.

Referring to the communication apparatus shown in fig. 11, the communication apparatus may perform the operations related to the terminal device in the above method embodiments, where the communication apparatus 100 includes, but is not limited to:

a transceiver unit 102, configured to receive precoding indication information, where the precoding indication information is used to indicate T precoding matrix indications, and each precoding matrix indication is associated with one or more time domain resources in S time domain resources; the S time domain resources are used for transmitting PUSCH, and the T is greater than or equal to 1 and less than or equal to the S; s is greater than or equal to 2;

a processing unit 101, configured to determine precoding matrices of S time domain resources according to the precoding indication information, where at least two time domain resources in the S time domain resources are respectively associated with different precoding matrices.

Therefore, the communication device is beneficial to ensuring the uplink transmission performance of the terminal equipment in the time domain resource aggregation mode. The communication apparatus may be applied to a time domain resource aggregation transmission mode, that is, the PUSCHs respectively transmitted on the S time domain resources belong to data of the same version or different versions of the same transmission block.

The related implementation manner of determining the precoding matrix of S time domain resources according to the T precoding indications by the communication device is similar to the implementation manner 1.1 to the implementation manner 1.3 in the above method embodiments, and the related implementation manner that the precoding matrix indicated by the M precoding indications belongs to the same codebook subset type, except that the frequency domain resources in these implementation manners are replaced by time domain resources, that is, the association relationship between the T precoding indications and the S time domain resources is explained.

The related implementation of the communication device for determining precoding matrices of S frequency domain resources according to T precoding indications is similar to the related explanations of implementation 2.1 to implementation 2.3 and implementation 3.1 to implementation 3.3 in the above method embodiments, except that the frequency domain resources in these implementations are replaced with time domain resources, i.e. the association relationship between T precoding indications and S time domain resources is explained.

Fig. 12 shows a schematic block diagram of the communication apparatus 200. The communication apparatus 200 corresponds to the network device in the uplink transmission method. Optionally, the communication device 200 is any TRP in fig. 3 (a) and 3 (b). The communication apparatus 200 includes:

a transceiving unit 201, configured to transmit precoding indication information; the precoding indication information is used for indicating M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for the terminal equipment to transmit a Physical Uplink Shared Channel (PUSCH); the M is greater than or equal to 1 and less than or equal to the N; said N is greater than or equal to 2; at least two frequency domain resources in the N frequency domain resources are respectively associated with different precoding matrixes.

For the related implementation of determining the precoding matrices of the N frequency domain resources according to the M precoding indications, reference may be made to implementation 1.1 to implementation 1.3 in the above method embodiments, and for the related implementation of the precoding matrices indicated by the M precoding indications belonging to the same codebook subset type, which is not described in detail here.

Schematic block diagram of a multiplexed communication device 200. The communication apparatus 200 corresponds to the network device in the uplink transmission method. Optionally, the communication device 200 is any TRP described above in fig. 10. The communication apparatus 200 includes:

a transceiving unit 201, configured to transmit precoding indication information; the precoding indication information is used for indicating T precoding indications; each precoding indication is associated with one or more of the S time domain resources; the S time domain resources are used for terminal equipment to transmit a Physical Uplink Shared Channel (PUSCH); t is greater than or equal to 1 and less than or equal to S; said S is greater than or equal to 2; at least two time domain resources in the S time domain resources are respectively associated with different precoding matrixes.

Therefore, the implementation method can determine the precoding matrix of the plurality of time domain resources, thereby being beneficial to improving the uplink transmission performance of the terminal equipment in the time domain resource aggregation mode.

In another embodiment, for the non-codebook based uplink transmission mode, the precoding indication information is a sounding reference signal indication field in downlink control information. Optionally, the sounding reference signal indication field is further configured to indicate an actual rank number of the terminal device for transmitting the PUSCH; alternatively, the sounding reference signal indication field is only used for indicating T precoding indications. Accordingly, the T precoding indications are T sounding reference signal indications indicated by the sounding reference signal indication field.

Fig. 13 shows a schematic block diagram of a communication device 300. In one implementation, the communication device 300 is a chip, a system-on-chip, or a processor, etc. that implements the various method embodiments described above. The communication device 300 may be configured to implement the method described in the foregoing method embodiment, and specific reference may be made to the description in the foregoing method embodiment.

In another implementation manner, the communication device 300 corresponds to a terminal device of the uplink transmission method. Alternatively, the communication device 300 is a terminal device in fig. 3 (a) and fig. 3 (b) or a device therein. Optionally, the communication device 300 is a chip, a chip system, or a processor for implementing the above method embodiments. The communication device 300 may be configured to implement the method described in the foregoing method embodiment, and specific reference may be made to the description in the foregoing method embodiment.

The communication device 300 may include one or more processors 301. The processor 301 may be a general purpose processor or a special purpose processor, etc. For example, a baseband processor or a central processor. The baseband processor may be configured to process communication protocols and communication data, and the central processor may be configured to control a communication device (e.g., a base station, a baseband chip, a terminal chip, a DU or CU, etc.), execute a computer program, and process data of the computer program.

The communication device 300 may also include a transceiver 305. The transceiver 305 may be referred to as a transceiving unit, a transceiver, or a transceiving circuit, etc., for implementing transceiving functions. The transceiver 305 may include a receiver, which may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmission circuit, etc. for implementing the transmission function. Optionally, the communication device 300 may also include an antenna 306.

Optionally, one or more memories 302 may be included in the communication apparatus 300, on which instructions 304 may be stored, and the instructions 304 may be a computer program, and the computer program may be executed on the communication apparatus 300, so that the communication apparatus 300 performs the method described in the above method embodiments. Optionally, the memory 302 may further store data therein. The communication device 300 and the memory 302 may be provided separately or may be integrated together.

In one embodiment, for the communication apparatus 300 to implement the functions of the terminal device in the above method embodiment:

the transceiver 305 is configured to perform the step of receiving precoding indication information in step S103 in fig. 5.

The processor 301 is configured to execute the step of determining the precoding matrices of the N frequency domain resources in step S103 in fig. 5, which is embodiment 1.1 to embodiment 1.3, embodiment 2.1 to embodiment 2.2, and embodiment 3.1 to embodiment 3.3.

For the communication device 300 to implement the functions of the network device in the above method embodiments:

the processor 301 is configured to execute step S101 in fig. 5.

The transceiver 305 is configured to execute step S102 in fig. 5.

In one implementation, a transceiver may be included in processor 301 to implement receive and transmit functions. The transceiver may be, for example, a transceiver circuit, or an interface circuit. The transmit and receive circuitry, interfaces or interface circuitry used to implement the receive and transmit functions may be separate or integrated. The transceiver circuit, the interface circuit or the interface circuit may be used for reading and writing code/data, or the transceiver circuit, the interface circuit or the interface circuit may be used for transmitting or transferring signals.

In one implementation, the processor 301 may store instructions 303, which may be computer programs, and the computer programs 303 run on the processor 301 may cause the communication apparatus 300 to perform the method described in the above method embodiment. The computer program 303 may be solidified in the processor 301, in which case the processor 301 may be implemented by hardware.

In one implementation, the communication device 300 may include circuitry that may implement the functionality of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described herein may be implemented on Integrated Circuits (ICs), analog ICs, radio Frequency Integrated Circuits (RFICs), mixed signal ICs, application Specific Integrated Circuits (ASICs), printed Circuit Boards (PCBs), electronic devices, and the like. The processor and transceiver may also be fabricated using various IC process technologies such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), bipolar Junction Transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication device in the above description of the embodiment may be an AP MLD or an AP of the AP MLD, but the scope of the communication device described in the present application is not limited thereto, and the structure of the communication device may not be limited by fig. 13. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication means may be:

(1) A stand-alone integrated circuit IC, or chip, or system-on-chip or subsystem;

(2) A set of one or more ICs, which optionally may also include storage means for storing data, computer programs;

(3) An ASIC, such as a Modem (Modem);

(4) A module that may be embedded within other devices;

(5) Receivers, terminal devices, smart terminals, cellular phones, wireless devices, handsets, mobile units, in-vehicle devices, network devices, cloud devices, artificial intelligence devices, and the like;

(6) Others, etc.

For the case that the communication device may be a chip or a chip system, see the schematic structural diagram of the chip shown in fig. 14. The chip shown in fig. 14 includes a processor 401 and an interface 402. The number of the processors 401 may be one or more, and the number of the interfaces 402 may be more.

For the chip to implement the functions of the terminal device in the above method embodiment:

in one implementation method,

an interface 402, configured to input precoding indication information, where the precoding indication information is used to indicate M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for transmitting a Physical Uplink Shared Channel (PUSCH); the M is greater than or equal to 1 and less than or equal to the N; said N is greater than or equal to 2;

a processor 401, configured to determine precoding matrices of the N frequency domain resources according to the precoding indication information.

Optionally, the chip may further perform the functions of the network device in the foregoing method embodiment:

in one way of carrying out the method,

a processor 401 configured to generate precoding indication information;

an interface 402, configured to output precoding indication information, where the precoding indication information is used to indicate M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for the terminal equipment to transmit a Physical Uplink Shared Channel (PUSCH); the M is greater than or equal to 1 and less than or equal to the N; said N is greater than or equal to 2;

optionally, the chip may also perform related embodiments in the above method embodiments, and details are not described here.

Those skilled in the art will also appreciate that the various illustrative logical blocks and steps (step) set forth in the embodiments of the present application may be implemented in electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Those skilled in the art 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 embodiments of the present application.

The present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a computer, implements the functionality of any of the above-described method embodiments.

The present application also provides a computer program product which, when executed by a computer, implements the functionality of any of the method embodiments described above.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer program is 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 program can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

Those of ordinary skill in the art will understand that: various numbers of the first, second, etc. mentioned in this application are only for convenience of description and distinction, and are not used to limit the scope of the embodiments of this application, and also represent a sequence order.

At least one of the present applications may also be described as one or more, and a plurality may be two, three, four or more, and the present application is not limited thereto. In the embodiment of the present application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "a", "B", "C", and "D", and the like, and the technical features described in "first", "second", "third", "a", "B", "C", and "D" are not in a sequential order or a size order.

The correspondence shown in the tables in the present application may be configured or predefined. The values of the information in each table are only examples, and may be configured to other values, which is not limited in the present application. When the correspondence between the information and each parameter is configured, it is not always necessary to configure all the correspondences indicated in each table. For example, in the table in the present application, the correspondence shown in some rows may not be configured. For another example, appropriate modification adjustments, such as splitting, merging, etc., can be made based on the above tables. The names of the parameters in the tables may be other names understandable by the communication device, and the values or the expression of the parameters may be other values or expressions understandable by the communication device. When the above tables are implemented, other data structures may be used, for example, arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables may be used.

Predefinition in this application may be understood as defining, predefining, storing, pre-negotiating, pre-configuring, curing, or pre-firing.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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.

It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An uplink transmission method applied to a mode of PUSCH transmission enhancement comprises the following steps:

receiving precoding indication information;

the precoding indication information is used for indicating M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for transmitting a Physical Uplink Shared Channel (PUSCH); m is greater than 1 and less than or equal to N; said N is greater than or equal to 2;

determining precoding matrixes of the N frequency domain resources according to the precoding indication information;

at least two frequency domain resources in the N frequency domain resources are respectively associated with different precoding matrixes;

if the PUSCH is transmitted based on a codebook, precoding matrixes respectively indicated by the M precoding indications belong to the same codebook subset type, or precoding matrixes respectively indicated by the M precoding indications belong to precoding matrixes corresponding to the maximum coherence capability of the terminal equipment, or precoding matrixes respectively indicated by the M precoding indications belong to the same codebook subset type and belong to precoding matrixes corresponding to the maximum coherence capability of the terminal equipment.

2. An uplink transmission method applied to a mode of PUSCH transmission enhancement comprises the following steps:

generating precoding indication information;

sending the precoding indication information;

the precoding indication information is used for indicating M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for the terminal equipment to transmit a Physical Uplink Shared Channel (PUSCH); the M is greater than 1 and less than or equal to the N; said N is greater than or equal to 2;

3. The method according to claim 1 or 2, wherein M is equal to 2, and the precoding indication information is used for indicating a first precoding indication and a second precoding indication;

the first precoding indication is associated with an odd number of the N frequency domain resources;

the second precoding indication is associated with an even number of the N frequency domain resources.

4. The method according to claim 1 or 2, wherein M is equal to 2, and the precoding indication information is used for indicating a first precoding indication and a second precoding indication;

the first precoding indication is associated with a top one of the N frequency domain resources

A frequency domain resource association;

the second precoding indication and a later one of the N frequency domain resources

The frequency domain resources are associated.

5. The method according to claim 1 or 2, wherein M is equal to N, and the precoding indication information is used for indicating N precoding indications; one precoding indication is associated with one frequency domain resource.

6. An uplink transmission method applied to a mode of PUSCH transmission enhancement comprises the following steps:

receiving precoding indication information;

the precoding indication indicated by the precoding indication information is associated with the even number of frequency domain resources in the N frequency domain resources, and the precoding matrix of the odd number of frequency domain resources in the N frequency domain resources is obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule; or the precoding indication indicated by the precoding indication information and the top of N frequency domain resources

A number of frequency domain resource associations, a back of the N frequency domain resources @>

The precoding matrix of each frequency domain resource is obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule;

the N frequency domain resources are used for transmitting a Physical Uplink Shared Channel (PUSCH); said N is greater than or equal to 2;

at least two frequency domain resources in the N frequency domain resources are respectively associated with different precoding matrixes.

7. An uplink transmission method applied to a mode of PUSCH transmission enhancement includes:

generating precoding indication information;

sending the precoding indication information;

A number of frequency domain resource associations, a post &inthe N frequency domain resources>

8. An uplink transmission device is applied to a mode of PUSCH transmission enhancement, and comprises a processing unit and a transceiving unit;

the receiving and sending unit is used for receiving precoding indication information;

the processing unit is configured to determine precoding matrices of the N frequency domain resources according to the precoding indication information;

9. An uplink transmission apparatus, applied to a mode of PUSCH transmission enhancement, the uplink transmission apparatus comprising: a processing unit and a transceiver unit;

the processing unit is configured to generate precoding indication information;

the transceiving unit is configured to send the precoding indication information;

the precoding indication information is used for indicating M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for a terminal to transmit a Physical Uplink Shared Channel (PUSCH); the M is greater than 1 and less than or equal to the N; said N is greater than or equal to 2;

10. The apparatus according to claim 8 or 9, wherein M is equal to 2, and the precoding indication information is used for indicating a first precoding indication and a second precoding indication;

11. The apparatus according to claim 8 or 9, wherein M is equal to 2, and the precoding indication information is used for indicating a first precoding indication and a second precoding indication;

the first precoding indication is associated with a first one of the N frequency domain resources

Associating frequency domain resources;

The frequency domain resources are associated.

12. The apparatus according to claim 8 or 9, wherein M is equal to N, and the precoding indication information is used to indicate N precoding indications; one precoding indication is associated with one frequency domain resource.

13. An uplink transmission device is applied to a mode of PUSCH transmission enhancement, and comprises a processing unit and a transceiving unit;

the N frequency domain resources are used for transmitting a Physical Uplink Shared Channel (PUSCH); the N is greater than or equal to 2;

14. An uplink transmission device is applied to a mode of PUSCH transmission enhancement, and comprises a processing unit and a transceiving unit;

the processing unit is configured to generate precoding indication information;

the precoding indication indicated by the precoding indication information is associated with the even number of frequency domain resources in the N frequency domain resources, and the precoding matrix of the odd number of frequency domain resources in the N frequency domain resources is obtained by transforming the precoding matrix indicated by the precoding indication by using a predefined rule; or, the precoding indication indicated by the precoding indication information and the top of the N frequency domain resources

15. The apparatus of claim 8, 9, 13 or 14,

the processing unit is a processor; the transceiver unit is a transceiver;

the uplink transmission device is terminal equipment.

16. The apparatus of claim 8, 9, 13 or 14,

the processing unit is a processor; the transceiver unit is a transceiver;

the uplink transmission device is network equipment.

17. A chip system, applied to a mode of PUSCH transmission enhancement, the chip system comprising at least one processor and an interface;

the interface is used for inputting precoding indication information;

the precoding indication information is used for indicating M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for transmitting a Physical Uplink Shared Channel (PUSCH); m is greater than 1 and less than or equal to N; the N is greater than or equal to 2;

the processor is configured to determine precoding matrices of the N frequency domain resources according to the precoding indication information;

18. A chip system, applied to a mode of PUSCH transmission enhancement, the chip system comprising at least one processor and an interface;

the processor is configured to generate precoding indication information;

the interface is used for outputting precoding indication information;

the precoding indication information is used for indicating M precoding indications; each precoding indication is associated with one or more of the N frequency domain resources; the N frequency domain resources are used for a terminal to transmit a Physical Uplink Shared Channel (PUSCH); the M is greater than 1 and less than or equal to the N; the N is greater than or equal to 2;

19. A chip system, applied to a mode of PUSCH transmission enhancement, the chip system comprising at least one processor and an interface;

the interface is used for inputting precoding indication information;

the N frequency domain resources are used for transmitting a Physical Uplink Shared Channel (PUSCH); m is greater than 1 and less than or equal to N; said N is greater than or equal to 2;

20. A chip system, applied to a mode of PUSCH transmission enhancement, the chip system comprising at least one processor and an interface;

the processor is configured to generate precoding indication information;

the interface is used for outputting precoding indication information;

21. A communications apparatus, comprising: a processor and a memory;

the memory for storing a computer program;

the processor for executing a computer program stored in the memory, which program, when executed, causes the communication apparatus to carry out the method of any one of claims 1-7.

22. The apparatus of claim 21, wherein the memory is external to the communication device.

23. A computer-readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 7.