CN111294968B

CN111294968B - Data transmission method and device

Info

Publication number: CN111294968B
Application number: CN201910027732.2A
Authority: CN
Inventors: 马大为
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2022-12-06
Anticipated expiration: 2039-01-11
Also published as: CN111294968A

Abstract

The disclosure relates to a data transmission method and a device, wherein the method comprises the following steps: scheduling a plurality of transmitting and receiving nodes TRP to carry out data transmission when serving the same user equipment through one downlink control information DCI; and carrying out rate matching on the rate matching resources according to the DCI indication and the data to be transmitted on the TRP. The method further comprises the following steps: scheduling a plurality of TRPs to perform data transmission when serving the same user equipment through one DCI; according to the DCI, merging and decoding the code block group CBG currently transmitted on the TRP and the CBG transmitted last time; the CBG transmission information in the DCI corresponds to CBGs transmitted by all TRPs. By performing corresponding rate matching and CBG retransmission for multiple TRPs, the data transmission method and apparatus according to the embodiments of the present disclosure can perform effective DCI scheduling during multiple TRP transmission.

Description

Data transmission method and device

Technical Field

The present disclosure relates to the field of wireless communications, and in particular, to a data transmission method and apparatus.

Background

In a Long Term Evolution (LTE) system, a coordinated multi-point transmission technology is supported as an effective method for improving a user data transmission rate, and is continuously enhanced in subsequent versions of an LTE protocol.

In a New Radio communication (NR) standardization process, a similar coordinated multipoint transmission technique is called a multi-transmitting-receiving node (TRP, tx/Rx Point) transmission. In the current NR protocol, multiple TRP transmission is not supported temporarily, and only one corresponding Downlink Control Information (DCI) can schedule one TRP to transmit a Physical Downlink Shared Channel (PDSCH), so that in a parameter domain of the DCI, influence caused by multiple TRP transmission is not considered for rate matching and Code Block Group (CBG) retransmission, thereby reducing the performance of DCI scheduling in a multiple TRP scenario.

Disclosure of Invention

In view of this, the present disclosure provides a data transmission method and apparatus, which can perform corresponding rate matching and CBG retransmission for multiple TRPs under the condition of performing data transmission on multiple TRPs, thereby ensuring the scheduling performance of DCI in the scenario of multiple TRPs.

According to a first aspect of the present disclosure, there is provided a data transmission method, the method comprising: scheduling a plurality of transmitting and receiving nodes TRP to carry out data transmission when serving the same user equipment through one downlink control information DCI; and carrying out rate matching on the rate matching resources according to the DCI indication and the data to be transmitted on the TRP.

In one possible implementation, the rate matching resource is valid for all TRPs; or, the rate matching resource is effective for each TRP; alternatively, the number of rate matching resources is adapted to the number of TRPs, and the rate matching resources are available for each TRP separately.

In one possible implementation, the rate matching resource is valid for all TRPs, and includes: for resource block RB level resources, the rate matching resources are implemented by a rate matching resource group ratemacchpatternrgroup, and all rate matching resources contained in the ratemacchpatternrgroup are valid for the transmission data on all TRPs; or, for resource element RE level resources, the rate matching resources are implemented by a zero power channel state information reference signal ZP CSI-RS resource set, and all rate matching resources included in the ZP CSI-RS resource set are effective for the transmission data on all TRPs.

In a possible implementation manner, rate matching the data to be transmitted on the TRP to the rate matching resource according to the indication of the DCI includes: for the RB level resource, the DCI is used for indicating whether the rateMetchPattern group is effective or not, and the data to be transmitted carries out rate matching on the corresponding rate matching resource contained in the rateMetchPattern group according to the indication result; or, for the RE-level resources, the DCI is used to indicate whether the ZP CSI-RS resource set is valid, and the data to be transmitted performs rate matching on corresponding rate matching resources included in the ZP CSI-RS resource set according to an indication result.

In one possible implementation, the rate matching resource, which is valid for each TRP, includes: for resource block RB level resources, the rate matching resources are realized through a rate matching resource group, namely RaeMatchPattern group, and each rate matching resource contained in the rate MatchPattern group is effective to the transmission data on the corresponding TRP respectively; or, for resource element RE level resources, the rate matching resources are implemented by a zero power channel state information reference signal ZP CSI-RS resource set, and each rate matching resource included in the ZP CSI-RS resource set is effective for the transmission data on the corresponding TRP, respectively.

In a possible implementation manner, rate matching is performed on a rate matching resource according to data to be transmitted on a TRP according to an indication of a DCI, which includes: for the RB level resource, the DCI is used for indicating whether the rateMetchPattern group takes effect or not, and the data to be transmitted carries out rate matching on the rate matching resource on the corresponding TRP contained in the rateMetchPattern group according to the indication result; or, for the RE level resource, the DCI is used for indicating whether the ZP CSI-RS resource set takes effect or not, and the data to be transmitted carries out rate matching on the rate matching resource on the corresponding TRP contained in the ZP CSI-RS resource set according to the indication result.

In one possible implementation, the number of the rate matching resources is adapted to the number of TRPs, and the rate matching resources are respectively valid for each TRP, including: for resource block RB level resources, the rate matching resources are realized through rate matching resource groups rateMatchPattern group, the number of the rateMatchPattern group is adaptive to the number of TRPs, and all the rate matching resources contained in each rateMatchPattern group are effective to the transmission data on the corresponding TRPs; or, for resource element RE level resources, the rate matching resources are implemented by ZP CSI-RS resource sets, the number of the ZP CSI-RS resource sets is adapted to the number of TRPs, and all the rate matching resources included in each ZP CSI-RS resource set are effective for the transmission data on the corresponding TRP.

In a possible implementation manner, rate matching is performed on a rate matching resource according to data to be transmitted on a TRP according to an indication of a DCI, which includes: for the RB level resource, the DCI is used for indicating whether the rateMetchPattern group is effective or not, and the data to be transmitted carries out rate matching on rate matching resources contained in the rateMetchPattern group according to an indication result; or, for the RE-level resources, the DCI is used to indicate whether the ZP CSI-RS resource set is valid, and the data to be transmitted performs rate matching on rate matching resources included in the ZP CSI-RS resource set according to an indication result.

According to a second aspect of the present disclosure, there is provided a data transmission method, the method comprising: scheduling a plurality of transmitting and receiving nodes TRP to carry out data transmission when serving the same user equipment through one downlink control information DCI; according to the DCI, merging and decoding the code block group CBG currently transmitted on the TRP and the CBG transmitted last time; the CBG transmission information in the DCI corresponds to CBGs sent by all TRPs.

In one possible implementation manner, merging and decoding the currently transmitted CBG and the CBG of the previous transmission on the TRP according to the DCI includes: and the CBG transmission information in the DCI adopts 1 bit to indicate whether the CBG sent by all TRPs can carry out combined decoding on the CBG transmitted at the previous time, and the CBG transmitted at the current time on the TRP and the CBG transmitted at the previous time are combined and decoded according to the indication result.

In a possible implementation manner, merging and decoding the currently transmitted CBG and the CBG of the previous transmission on the TRP according to the DCI includes: the bit number adopted by the CBG transmission information in the DCI is the same as the number of the TRPs, and is used for indicating whether the CBG sent by each TRP can carry out merging decoding on the CBG transmitted at the previous time or not, and carrying out merging decoding on the CBG currently transmitted on the TRP and the CBG transmitted at the previous time according to the indication result.

In one possible implementation manner, merging and decoding the currently transmitted CBG and the CBG of the previous transmission on the TRP according to the DCI includes: the number of bits used by the CBG transmission information in the DCI and the number of the TRPs satisfy:

Bit _n ＝log ₂ (L+1)

wherein Bit is _n The bit number adopted by CBG transmission information in DCI, wherein L is the number of TRP;

and the CBG is used for indicating whether the CBG sent by the TRP can carry out merging decoding on the CBG transmitted at the previous time or not, and carrying out merging decoding on the CBG currently transmitted on the TRP and the CBG transmitted at the previous time according to an indication result.

According to a third aspect of the present disclosure, there is provided a data transmission apparatus comprising: a scheduling unit, configured to schedule, through one downlink control information DCI, a plurality of transceiving nodes TRP to perform data transmission when serving a same user equipment; and the rate matching unit is used for performing rate matching on the rate matching resources according to the DCI indication and the data to be transmitted on the TRP.

In one possible implementation, the rate matching resource is valid for all TRPs; or, the rate matching resource is effective for each TRP; or, the number of the rate matching resources is adapted to the number of TRPs, and the rate matching resources are respectively valid for each TRP.

In one possible implementation, the rate matching resource is valid for all TRPs, and includes: for resource block RB level resources, the rate matching resources are realized through a rate matching resource group, namely RatematcchPattern group, and all rate matching resources contained in the RatematcchPattern group are effective to the transmission data on all TRPs; or, for resource element RE level resources, the rate matching resources are implemented by a zero power channel state information reference signal ZP CSI-RS resource set, and all rate matching resources included in the ZP CSI-RS resource set are valid for the transmission data on all TRPs.

In one possible implementation, the rate matching unit is configured to: for the RB level resource, the DCI is used for indicating whether rateMetchPattern group takes effect or not, and the data to be transmitted carries out rate matching on the corresponding rate matching resource contained in the rateMetchPattern group according to the indication result; or, for the RE-level resources, the DCI is used to indicate whether the ZP CSI-RS resource set is valid, and the data to be transmitted performs rate matching on corresponding rate matching resources included in the ZP CSI-RS resource set according to an indication result.

In one possible implementation manner, the rate matching unit is configured to: for the RB level resource, the DCI is used for indicating whether the rateMetchPattern group takes effect or not, and the data to be transmitted carries out rate matching on the rate matching resource on the corresponding TRP contained in the rateMetchPattern group according to the indication result; or, for the RE-level resource, the DCI is used to indicate whether the ZP CSI-RS resource set is valid, and the data to be transmitted performs rate matching on the rate matching resource on the corresponding TRP included in the ZP CSI-RS resource set according to the indication result.

In one possible implementation manner, the number of the rate matching resources is adapted to the number of TRPs, and the rate matching resources are respectively available for each TRP, including: for resource block RB level resources, the rate matching resources are realized through rate matching resource groups rateMatchPattern group, the number of the rateMatchPattern group is adaptive to the number of TRPs, and all the rate matching resources contained in each rateMatchPattern group are effective to the transmission data on the corresponding TRPs; or, for resource element RE level resources, the rate matching resources are implemented by ZP CSI-RS resource sets, the number of the ZP CSI-RS resource sets is adapted to the number of TRPs, and all the rate matching resources included in each ZP CSI-RS resource set are effective for the transmission data on the corresponding TRP.

In one possible implementation manner, the rate matching unit is configured to: for the RB level resource, the DCI is used for indicating whether rateMeatchPattern group is effective or not, and the data to be transmitted carries out rate matching on rate matching resources contained in the rateMeatchPattern group according to an indication result; or, for the RE level resource, the DCI is used for indicating whether the ZP CSI-RS resource set takes effect or not, and the data to be transmitted carries out rate matching on the rate matching resource contained in the ZP CSI-RS resource set according to the indication result.

According to a fourth aspect of the present disclosure, there is provided a data transmission apparatus including: the scheduling unit is used for scheduling a plurality of transmitting and receiving nodes TRP to carry out data transmission when serving the same user equipment through one downlink control information DCI; a merging decoding execution unit, configured to merge and decode a code block group CBG currently transmitted on the TRP and a CBG transmitted last time according to the DCI; the CBG transmission information in the DCI corresponds to CBGs sent by all TRPs.

In one possible implementation, the merge coding execution unit is configured to: and the CBG transmission information in the DCI adopts 1 bit to indicate whether the CBG sent by all TRPs can carry out combined decoding on the CBG transmitted at the previous time, and the CBG transmitted at the current time on the TRP and the CBG transmitted at the previous time are combined and decoded according to the indication result.

In one possible implementation, the merge coding execution unit is configured to: the bit number adopted by the CBG transmission information in the DCI is the same as the number of the TRPs, and is used for indicating whether the CBG sent by each TRP can carry out merging decoding on the CBG transmitted at the previous time or not, and carrying out merging decoding on the CBG currently transmitted on the TRP and the CBG transmitted at the previous time according to the indication result.

In one possible implementation, the merge coding execution unit is configured to: the number of bits used by the CBG transmission information in the DCI and the number of the TRPs satisfy:

Bit _n ＝log ₂ (L+1)

wherein, bit _n The bit number adopted by CBG transmission information in DCI, wherein L is the number of TRP; and the CBG is used for indicating whether the CBG sent by the TRP can carry out merging decoding on the CBG transmitted at the previous time or not, and carrying out merging decoding on the CBG currently transmitted on the TRP and the CBG transmitted at the previous time according to an indication result.

According to a fifth aspect of the present disclosure, there is provided a data transmission apparatus comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to perform the method of the first aspect.

According to a sixth aspect of the present disclosure, there is provided a data transmission apparatus comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to perform the method of the second aspect described above.

According to a seventh aspect of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the method of the first aspect described above.

According to an eighth aspect of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the method of the second aspect described above.

When a plurality of TRPs are scheduled to carry out data transmission through one DCI, carrying out rate matching on data to be transmitted on the TRPs and rate matching resources, and merging and decoding a code block group CBG currently transmitted on the TRP and a CBG transmitted at the previous time according to the DCI; and the CBG transmission information in the DCI corresponds to CBGs sent by all TRPs, the data transmission method and apparatus according to the embodiments of the present disclosure can ensure rate matching and CBG retransmission for a plurality of TRPs in a scenario where data transmission is performed by a plurality of TRPs, thereby performing effective DCI scheduling in a scenario where a plurality of TRPs are performed.

Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

Fig. 1 shows a flow chart of a data transmission method according to an embodiment of the present disclosure.

Fig. 2 shows a flow chart of a data transmission method according to an embodiment of the present disclosure.

Fig. 3 shows a block diagram of a data transmission device according to an embodiment of the present disclosure.

Fig. 4 shows a block diagram of a data transmission device according to an embodiment of the present disclosure.

Fig. 5 shows a block diagram of a data transmission device according to an embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.

In the NR standardization process, the coordinated multi-point transmission technique is called multi-TRP transmission. Multiple TRP transmission was not completed during Rel-15 version standardization. Therefore, the related version of NR protocol does not support multi-TRP transmission, and only one TRP can be scheduled to transmit PDSCH by corresponding one DCI, and in the parameter domain of DCI, the influence of multi-TRP transmission is not considered by rate matching and CBG retransmission.

In the related standard protocol, data transmitted by the base station needs to perform rate matching on the rate matching resources indicated by the DCI. The Rate Matching resources comprise RB level resources and RE level resources, and are respectively indicated by two parameter domains of a Rate Matching indicator and a ZP CSI-RS trigger in the DCI.

The associated rate matching procedure is typically: for Resource Block (RB, resource Block) level resources, first, configuring M Rate Matching Resource groups, ratemacchpatternrroup, by a high layer, where each ratemacchpatternrroup includes a group of RB level Rate Matching resources, and a Rate Matching indicator in the DCI includes M bits, where each bit indicates whether a corresponding ratemacchpatternrroup is in effect, that is, whether data needs to perform Rate Matching on resources in the ratemacchpatternrroup.

For resource elements (RE, res)Resource Element) level resource, firstly configuring N aperiodic zero-power channel state information reference signal ZP CSI-RS resource sets by a high layer, wherein each ZP CSI-RS resource set comprises a plurality of ZP CSI-RS resources, and the ZP CSI-RS trigger in the DCI comprises log ₂ And the (N + 1) bit indicates that a certain aperiodic ZP CSI-RS resource set takes effect, namely whether data needs to perform rate matching on resources in the aperiodic ZP CSI-RS resource set or not, and the ZP CSI-RS trigger domain value of all 0 indicates that any aperiodic ZP CSI-RS resource set is not activated.

In terms of CBG retransmission, if CBG level data retransmission is performed, the related CBG retransmission method generally includes: the parameter CBGTI in the DCI for indicating which CBGs are transmitted by the currently scheduled data includes K bits, each bit corresponds to one CBG, and a bit of 1 indicates that the CBG is retransmitted. Meanwhile, the parameter CBGFI in the DCI for indicating whether the current scheduling data can be combined with the CBG received last time for performing the merge decoding includes 1 bit, and a bit of 1 indicates that the CBG retransmitted this time cannot perform the merge decoding on the CBG transmitted last time, that is, the CBG transmitted last time is not actually transmitted (for example, the CBG resource location is occupied by the high-priority data coverage).

As can be seen from the rate matching process and the CBG retransmission method, in the related art, both the rate matching and the CBG retransmission are directed to a scenario where a single TRP is scheduled by DCI for data transmission, and in a scenario where multiple TRPs are provided, parameters used in the method cannot correspond to multiple TRPs, thereby causing failure of rate matching and CBG retransmission and reducing scheduling performance of DCI.

In order to solve the above problem, this embodiment discloses an application example of a data transmission method, in this example, one DCI may schedule multiple transceiving nodes TRP to perform data transmission when serving the same user equipment, and a base station configures a rate matching resource for the user equipment, where the rate matching resource corresponds to the TRP, so that the TRP may perform rate matching on data to be transmitted and a corresponding rate matching resource according to an indication of the DCI; meanwhile, the CBG transmission information in the DCI corresponds to the CBG transmitted by each TRP, so that the user equipment can perform merging and decoding on the CBG currently transmitted on the TRP and the CBG transmitted last time for each TRP according to the CBG transmission information in the DCI.

Fig. 1 shows a flow chart of a data transmission method according to an embodiment of the present disclosure. The method may be performed by a user equipment, as shown in fig. 1, and may include:

step S11, scheduling a plurality of transmitting and receiving nodes TRP to carry out data transmission when serving the same user equipment through one downlink control information DCI.

And step S12, carrying out rate matching on the data to be transmitted on the TRP according to the indication of the DCI.

The rate matching resources may be resource block RB level resources or resource element RE level resources. The correspondence between the rate matching resources and the TRPs may have various forms. The rate matching resources may be configured by the base station.

In one possible implementation, the rate matching resources are valid for all TRPs.

In a possible implementation manner, the rate matching resource may be an RB-level resource, and in this case, the rate matching resource may be implemented by a rate matching resource group, ratemacchpatternrroup, and all rate matching resources included in the ratemacchpatternrroup are valid for the transmission data on all TRPs. In a possible implementation manner, for the rate matching resource configured in the above implementation manner, the process of performing rate matching may be: the DCI is used for indicating whether the rateMetchPattern group is effective or not, and the data to be transmitted carries out rate matching on the corresponding rate matching resources contained in the rateMetchPattern group according to the indication result. In an example, the base station configures M ratemacchpatternrroups, where a specific number of M is not limited in this example and may be configured according to an actual situation, each ratemacchpatternrroup may include a set of RB-level Rate Matching resources, and each Rate Matching resource is valid for data transmitted by all TRPs, that is, data transmitted on each TRP may be Rate matched for the Rate Matching resources in the ratemacchpatternrroups according to an indication condition of the DCI, a parameter used for indicating a Rate Matching condition in the DCI is not specifically limited, in this example, the data may be a Rate Matching indicator, where a number of bits included in the data is also M, a specific number of M is not limited in this example, each bit is used to indicate whether a corresponding ratemacchpatternrroup is valid, that whether the data to be transmitted needs to perform Rate Matching for resources in the ratemacchpatternrroups, and in this example, it is possible that each ratemacchpatternrroup includes a corresponding Rate Matching resource to implement Rate Matching for all data when all ratemacchpatternrroups transmit data, and thus, the Rate Matching of the data is possible to implement Rate Matching for all data transmitted according to any of the corresponding ratemacchpatternrroupchtungroupchtungroupproup.

In a possible implementation manner, the rate matching resource may be a resource of an RE level, and at this time, the rate matching resource may be implemented by a zero-power channel state information reference signal ZP CSI-RS resource set, and all rate matching resources included in the ZP CSI-RS resource set are valid for the transmission data on all TRPs. In a possible implementation manner, for the rate matching resource configured in the above implementation manner, the process of performing rate matching may be: the DCI is used for indicating whether the ZP CSI-RS resource set takes effect or not, and the data to be transmitted carries out rate matching on the corresponding rate matching resources contained in the ZP CSI-RS resource set according to the indication result. In an example, a base station configures N aperiodic ZP CSI-RS resource sets, a specific number of N is not limited in this example and may be configured according to an actual situation, each ZP CSI-RS resource set may include a plurality of ZP CSI-RS resources, each ZP CSI-RS resource is effective for data sent by all TRPs, that is, data sent on each TRP may be rate-matched to the ZP CSI-RS resources in the ZP CSI-RS resource set according to an indication condition of DCI, a parameter used for indicating a rate-matching condition in the DCI is not specifically limited, in this example, the ZP CSI-RS trigger may be included, and a number of bits may be log ₂ (N + 1), the specific number of N is not limited in this example, and since there is a correspondence between the number of bits of the ZP CSI-RS trigger and the number of ZP CSI-RS resource sets, it is possible to indicate whether a certain ZP CSI-RS resource set is valid or not by a combination of different bits in the ZP CSI-RS trigger, that is, data to be transmittedWhether the rate matching needs to be carried out on the ZP CSI-RS resources in the ZP CSI-RS resource set or not can indicate that any ZP CSI-RS resource set is not activated when the ZP CSI-RS trigger threshold value is all 0. In this example, since the ZP CSI-RS resources included in each ZP CSI-RS resource set are valid for all data transmitted by the TRP, when any TRP transmits data, the corresponding ZP CSI-RS resource can be found in the ZP CSI-RS resource set according to the indication in the DCI, thereby implementing rate matching and ensuring normal scheduling of the DCI.

In one possible implementation, the rate matching resources are valid separately for each TRP.

In a possible implementation manner, the rate matching resource may be an RB-level resource, and at this time, the rate matching resource may be implemented by a rate matching resource group ratemacchpattern group, and each rate matching resource included in the rate macchpattern group is effective for the transmission data on the corresponding TRP, respectively. In a possible implementation manner, for the rate matching resource configured in the foregoing implementation manner, the process of performing rate matching may be: the DCI is used for indicating whether the rateMetchPattern group is effective or not, and the data to be transmitted carries out rate matching on rate matching resources on corresponding TRP contained in the rateMetchPattern group according to the indication result. In an example, a base station configures M ratemaphattergroup, where a specific number of M is not limited in this example, and may be configured according to an actual situation, each ratemaphattergroup may include a set of RB-level Rate Matching resources, and a TRP configured for each Rate Matching resource in each ratemaphattergroup, that is, data transmitted on each TRP, may find a corresponding Rate Matching resource in the ratemaphattergroup for Rate Matching according to an indication condition of DCI, where a parameter used to indicate a Rate Matching condition in the DCI is not specifically limited, in this example, may be a Rate Matching indicator, where the included number of bits is also M, the specific number of M is also not limited in this example, each bit is used to indicate whether the corresponding ratemaphattergroup is valid, that whether data to be transmitted needs to match the Rate of the corresponding ratemaphattergroup in this example, and therefore, when a corresponding Rate Matching resource is found in each ratemaphattergroutphattergroup resource, it is possible to implement that the corresponding TRP matches the Rate Matching resource in this example, and thus, it is possible to implement that when the corresponding ratemaphattertphatternputgroup matches the corresponding TRP resource is found in the corresponding ratetaphattergroutpatch resource, the DCI.

In a possible implementation manner, the rate matching resource may be a resource of an RE level, and at this time, the rate matching resource may be implemented by a zero power channel state information reference signal ZP CSI-RS resource set, and each rate matching resource included in the ZP CSI-RS resource set is effective for the transmission data on the corresponding TRP, respectively. In a possible implementation manner, for the rate matching resource configured in the above implementation manner, the process of performing rate matching may be: the DCI is used for indicating whether the ZP CSI-RS resource set takes effect or not, and the data to be transmitted carries out rate matching on rate matching resources on corresponding TRP contained in the ZP CSI-RS resource set according to the indication result. In an example, a base station configures N aperiodic ZP CSI-RS resource sets, a specific number of N is not limited in this example and may be configured according to an actual situation, each ZP CSI-RS resource set may include a plurality of ZP CSI-RS resources, and in each ZP CSI-RS resource set, a TRP for which each ZP CSI-RS resource configuration is directed, that is, data transmitted on each TRP, may be obtained by finding a corresponding ZP CSI-RS resource in the ZP CSI-RS resource set according to an indication condition of DCI for rate matching, a parameter used for indicating a rate matching condition in the DCI is not specifically limited, in this example, the ZP CSI-RS trigger may be used, and a bit number included may be log ₂ (N + 1), the specific number of N is also not limited in this example, and since there is a correspondence between the number of bits of the ZP CSI-RStrigger and the number of the ZP CSI-RS resource sets, it can be indicated whether a certain ZP CSI-RS resource set is in effect through a combination of different bits in the ZP CSI-RS trigger, that is, whether data to be transmitted needs to perform rate matching on the ZP CSI-RS resources in the ZP CSI-RS resource set, and when the ZP CSI-RS trigger threshold is all 0, it can be indicated that any ZP CSI-RS resource set is not activatedThe ZP CSI-RS resource set is provided with the corresponding TRP for each ZP CSI-RS resource, so that when any TRP sends data, the corresponding ZP CSI-RS resource can be found in the ZP CSI-RS resource set according to the indication in the DCI, thereby realizing rate matching and ensuring the normal scheduling of the DCI.

In one possible implementation, the number of rate matching resources is adapted to the number of TRPs, and the rate matching resources are individually available for each TRP.

In a possible implementation manner, the rate matching resource may be an RB-level resource, in which case the rate matching resource may be implemented by a rate matching resource group ratemacchpatternrroup, the number of ratemacchpatternrroup is adapted to the number of TRPs, and all rate matching resources included in each ratemacchpatternrroup are valid for the transmission data on the corresponding TRP. In a possible implementation manner, for the rate matching resource configured in the above implementation manner, the process of performing rate matching may be: the DCI is used for indicating whether the rateMeatchPattern group is effective or not, and the data to be transmitted carries out rate matching on rate matching resources contained in the rateMeatchPattern group according to the indication result. In an example, the number of ratemaphatchpatterntgroup is related to the number of TRPs, where the number of TRPs in this example may be L, so that M _ i ratemaphatchpatterntgroup is configured for each TRP correspondingly, where the number of i may be taken from 1 to L, that is, each TRP is configured with M _ i ratemaphatchpatterntgroup, where the specific number of M _ i is not limited in this example, and may be configured according to an actual situation, the number of M _ i corresponding to different TRPs may be the same or different, and may be configured according to an actual situation, or may not be specifically limited, each ratemaphatchpatterntgroup may include a group of RB-level Rate Matching resources, and each TRP may configure a group of M _ i corresponding Rate Matching resources, where each TRP configures a corresponding ratemaphatchpatterntgroup Rate Matching resource, and therefore, each ratemaphatchpatterntgroup contains a corresponding Rate Matching resource, and is configured according to an example, whether a Rate Matching DCI data Matching Rate Matching a corresponding to a certain TRP _ i is included in an example, or not specifically configured, and whether a Rate Matching DCI corresponding to a sum of TRP is a Rate Matching DCI.

In a possible implementation manner, the rate matching resources may be RE-level resources, and at this time, the rate matching resources may be implemented by zero-power channel state information reference signal ZP CSI-RS resource sets, where the number of the ZP CSI-RS resource sets is adapted to the number of TRPs, and all the rate matching resources included in each ZP CSI-RS resource set are effective for the transmission data on the corresponding TRPs. In a possible implementation manner, for the rate matching resource configured in the foregoing implementation manner, the process of performing rate matching may be: the DCI is used for indicating whether the ZP CSI-RS resource set takes effect or not, and the data to be transmitted carries out rate matching on rate matching resources contained in the ZP CSI-RS resource set according to the indication result. In an example, the number of aperiodic ZP CSI-RS resource sets is related to the number of TRPs, and in this example, the number of TRPs may be denoted as L, so that N _ i aperiodic ZP CSI-RS resource sets are correspondingly configured for each TRP, the number of i may be taken from 1 to L, that is, each TRP is configured with N _ i aperiodic ZP CSI-RS resource sets, the specific number of N _ i is not limited in this example, and may be configured according to an actual situation, the number of N _ i corresponding to different TRPs may be the same or different, and may be configured according to an actual situation, or may not be specifically limited, each ZP CSI-RS resource set may include a plurality of ZP CSI-RS resources, and each TRP is configured with N _ i corresponding ZP CSI-RS resource sets, so that each aperiodic ZP CSI-RS resource set includesThe ZP CSI-RS resources all have specific TRPs for matching, that is, data sent on each TRP may be rate-matched with the ZP CSI-RS resources included in the corresponding aperiodic ZP CSI-RS resource set according to an indication condition of DCI, a parameter used for indicating the rate-matching condition in the DCI is not specifically limited, and in this example, the parameter may be a ZP CSI-RS trigger, in this example, the number of parameters included in the DCI is directionally matched with the number of TRPs, that is, L ZP CSI-RS triggers are included, and the number of bits included in each ZP CSI-RS trigger may be log ₂ (N _ i + 1), the specific number of N _ i is not limited in this example, and since there is a corresponding relationship between the number of bits of the ZP CSI-RStrigger and the number of ZP CSI-RS resource sets, it may be indicated whether a certain ZP CSI-RS resource set is valid through a combination of different bits in the ZP CSI-RS trigger, that is, whether data to be transmitted needs to perform rate matching on the ZP CSI-RS resources in the ZP CSI-RS resource set, and when the ZP CSI-RS trigger threshold is all 0, it may be indicated that any ZP CSI-RS resource set is not activated.

Therefore, when rate matching resources are configured, certain relation matching is carried out on different TRPs according to the number of the TRPs, and whether the rate matching is carried out is indicated by adjusting corresponding indication parameters in the DCI, so that each TRP can find the corresponding rate matching resource when carrying out data transmission, the rate matching is realized, and the problem that the existing rate matching can only be realized aiming at a single TRP is solved. Meanwhile, when a certain TRP (marked as TRP _ i) carries out data transmission, only the rate matching resource corresponding to the TRP _ i indicated in the DCI needs to be subjected to rate matching, so that the code rate of data can be reduced, and the success rate of data transmission is improved.

Fig. 2 shows a flow chart of a data transmission method according to an embodiment of the present disclosure. The method may be performed by a user equipment, as shown in fig. 2, and may include:

step S21, scheduling a plurality of transceiving nodes TRP to perform data transmission when serving the same user equipment through one downlink control information DCI.

And step S22, according to the DCI, merging and decoding the code block group CBG currently transmitted on the TRP and the CBG transmitted last time.

Step S23, the CBG transmission information in the DCI corresponds to the CBGs transmitted by all TRPs.

The implementation form of the CBG transmission information in the DCI is not limited, and may be CBGFI, which is used to indicate whether current scheduling data can be combined with a CBG received last time for merging and decoding.

In one possible implementation, the implementation of step S22 may be: and the CBG transmission information in the DCI adopts 1 bit to indicate whether the CBG sent by all TRPs can carry out combined decoding on the CBG transmitted at the previous time or not, and the CBG transmitted at the current time on the TRP and the CBG transmitted at the previous time are combined and decoded according to the indication result. In an example, the number of TRPs may be recorded as L, the number of L is not specifically limited, and the selection is performed according to an actual situation, CBGTI is a parameter used for indicating which CBGs are transmitted by currently scheduled data in DCI, in this example, CBGTI corresponds to all CBGs transmitted by TRP, and may be recorded as K bits, the number of K is also not limited, and is determined according to an actual situation. In this example, the CBG transmission information in the DCI is set to be CBGFI, and the CBGFI uses 1 bit to indicate whether all CBGs sent by the TRP can perform merge decoding on a CBG transmitted previously, that is, when any TRP performs merge decoding, it determines whether the merge decoding can be successful according to the same bit of the same CBGFI, if the instruction can be successful, the TRP performs the merge decoding, and if the instruction cannot be successful, the TRP does not perform the merge decoding.

In one possible implementation, the implementation of step S22 may be: the bit number adopted by the CBG transmission information in the DCI is the same as the number of the TRPs, and is used for indicating whether the CBG sent by each TRP can carry out merging decoding on the CBG transmitted at the previous time or not, and carrying out merging decoding on the CBG currently transmitted on the TRP and the CBG transmitted at the previous time according to the indication result. In an example, the number of TRPs may be recorded as L, the number of L is not specifically limited, and the selection is performed according to an actual situation, CBGTI is a parameter used for indicating which CBGs are transmitted by currently scheduled data in DCI, in this example, CBGTI corresponds to all CBGs transmitted by TRP, and may be recorded as K bits, the number of K is also not limited, and is determined according to an actual situation. In this example, the CBG transmission information in the DCI is set to CBGFI, the CBGFI uses L bits, the ith bit indicates whether the CBG sent by the TRP _ i can perform merge decoding on the CBG transmitted at the previous time, that is, when a certain TRP (denoted as TRP _ i) performs merge decoding, a specific ith bit is found in the CBGFI, and according to the indication result on the ith bit, it is determined whether the merge decoding can be successful, if the indication can be successful, the TRP _ i performs the merge decoding, and if the indication cannot be successful, the TRP _ i does not perform the merge decoding.

In one possible implementation manner, the implementation manner of step S22 may be: the bit number adopted by the CBG transmission information in the DCI and the number of the TRPs meet the following conditions:

Bit _n ＝log ₂ (L+1)

wherein, bit _n The bit number adopted by CBG transmission information in DCI, wherein L is the number of TRP; and the CBG is used for indicating whether the CBG sent by the TRP can carry out merging decoding on the CBG transmitted at the previous time or not, and carrying out merging decoding on the CBG currently transmitted on the TRP and the CBG transmitted at the previous time according to an indication result. In an example, the number of TRPs may be recorded as L, the number of L is not specifically limited, and the selection is performed according to an actual situation, CBGTI is a parameter used for indicating which CBGs are transmitted by currently scheduled data in DCI, in this example, CBGTI corresponds to all CBGs transmitted by TRP, and may be recorded as K bits, the number of K is also not limited, and is determined according to an actual situation. In this example, the CBG transmission information in the DCI is set to CBGFI, which takes log ₂ The bit (L + 1) is a bit, and since the bit number of the CBGFI has a corresponding relationship with the number L of the TRPs, it can be indicated by a combination of different bit positions in the CBGFI whether the CBG sent by the corresponding TRP can perform the merge decoding on the CBG transmitted at the previous time, that is, when a certain TRP (denoted as TRP _ i) performs the merge decoding, a bit position related to the TRP _ i is found in the CBGFI, and the bit position related to the TRP _ i is found according to the related ratioAnd determining whether the merging decoding can be successful or not according to the indication result on the special bit, carrying out merging decoding on the TRP _ i if the indication can be successful, and not carrying out the merging decoding on the TRP _ i if the indication can not be successful.

Therefore, by linking the number of bits in the CBG retransmission information with the number of TRPs, when each TRP performs data transmission, corresponding indication information indicates whether the CBG on the TRP can be subjected to combined decoding, thereby solving the problem that the CBG retransmission can only be realized for a single TRP at present. Meanwhile, for different TRPs, whether the CBG can be combined with the CBG transmitted before for merging and decoding can be independently indicated, and the flexibility of decoding is improved.

Fig. 3 shows a block diagram of a data transmission apparatus according to an embodiment of the present disclosure, and as shown in fig. 3, the apparatus 30 includes:

a scheduling unit 31, configured to schedule, through one downlink control information DCI, a plurality of transceiving nodes TRP to perform data transmission when serving a same user equipment;

a rate matching unit 32, configured to perform rate matching on the rate matching resource for the data to be transmitted on the TRP according to the indication of the DCI.

In one possible implementation, the rate matching resources, are valid for all TRPs; or, rate matching resources, valid separately for each TRP; alternatively, the number of rate matching resources is adapted to the number of TRPs, and the rate matching resources are individually available for each TRP.

In one possible implementation, the rate matching resource, which is valid for all TRPs, includes: for resource block RB level resources, rate matching resources are realized through a rate matching resource group, namely RatematchPattern group, and all rate matching resources contained in the rate matching pattern group are effective to the transmission data on all TRPs; or, for resource element RE level resources, the rate matching resources are implemented by a zero power channel state information reference signal ZP CSI-RS resource set, and all the rate matching resources included in the ZP CSI-RS resource set are effective for the transmission data on all the TRPs.

In one possible implementation, the rate matching unit is configured to: for RB level resources, the DCI is used for indicating whether rateMetchPattern group takes effect or not, and the data to be transmitted carries out rate matching on corresponding rate matching resources contained in the rateMetchPattern group according to the indication result; or, for the RE-level resources, the DCI is used to indicate whether the ZP CSI-RS resource set is valid, and the data to be transmitted performs rate matching on the corresponding rate matching resources included in the ZP CSI-RS resource set according to the indication result.

In one possible implementation, the rate matching resource, which is valid for each TRP, includes: for resource block RB level resources, rate matching resources are realized through a rate matching resource group, namely RatematchPattern group, and each rate matching resource contained in the rate matching resource group is effective to the transmission data on the corresponding TRP; or, for resource element RE level resources, the rate matching resources are implemented by a zero power channel state information reference signal ZP CSI-RS resource set, and each rate matching resource included in the ZP CSI-RS resource set is effective for the transmission data on the corresponding TRP, respectively.

In one possible implementation, the rate matching unit is configured to: for RB level resources, the DCI is used for indicating whether rateMetchPattern group takes effect or not, and the data to be transmitted carries out rate matching on rate matching resources on corresponding TRP contained in the rateMetchPattern group according to the indication result; or, for the RE level resource, the DCI is used for indicating whether the ZP CSI-RS resource set takes effect or not, and the data to be transmitted carries out rate matching on the rate matching resource on the corresponding TRP contained in the ZP CSI-RS resource set according to the indication result.

In one possible implementation, the number of rate matching resources is adapted to the number of TRPs, and the rate matching resources are respectively available for each TRP, including: for resource block RB level resources, rate matching resources are realized through rate matching resource groups, namely RatematcchPattern group, the number of the RatematcchPattern group is adaptive to the number of TRPs, and all rate matching resources contained in each RatematcchPattern group are effective to the transmission data on the corresponding TRPs; or, for resource element RE level resources, the rate matching resources are implemented by ZP CSI-RS resource sets, the number of the ZP CSI-RS resource sets is adapted to the number of TRPs, and all the rate matching resources included in each ZP CSI-RS resource set are effective for the transmission data on the corresponding TRP.

In one possible implementation, the rate matching unit is configured to: for RB level resources, the DCI is used for indicating whether rateMetchPattern group takes effect or not, and the data to be transmitted carries out rate matching on rate matching resources contained in the rateMetchPattern group according to an indication result; or, for the RE level resources, the DCI is used for indicating whether the ZP CSI-RS resource set takes effect or not, and the data to be transmitted carries out rate matching on the rate matching resources contained in the ZP CSI-RS resource set according to the indication result.

Fig. 4 shows a block diagram of a data transmission apparatus according to an embodiment of the present disclosure, and as shown in fig. 4, the apparatus 40 includes:

a scheduling unit 41, configured to schedule, through one downlink control information DCI, a plurality of transceiving nodes TRP to perform data transmission when serving a same user equipment;

a merging decoding execution unit 42, configured to merge and decode the code block group CBG currently transmitted on the TRP and the CBG transmitted last time according to the DCI; the CBG transmission information in the DCI corresponds to CBGs transmitted by all TRPs.

In one possible implementation, the merging decoding execution unit is configured to: and the CBG transmission information in the DCI adopts 1 bit to indicate whether the CBG sent by all TRPs can carry out combined decoding on the CBG transmitted at the previous time or not, and the CBG transmitted at the current time on the TRP and the CBG transmitted at the previous time are combined and decoded according to the indication result.

In one possible implementation manner, the merging decoding execution unit is configured to: the bit number adopted by the CBG transmission information in the DCI is the same as the number of the TRPs, and is used for indicating whether the CBG sent by each TRP can carry out the merging decoding on the CBG transmitted at the previous time or not, and carrying out the merging decoding on the CBG currently transmitted on the TRP and the CBG transmitted at the previous time according to the indication result.

In one possible implementation, the merging decoding execution unit is configured to: the bit number adopted by the CBG transmission information in the DCI and the number of TRPs meet the following conditions:

Bit _n ＝log ₂ (L+1)

wherein, bit _n The bit number adopted by the CBG transmission information in the DCI, and L is the number of TRPs;

Fig. 5 is a block diagram illustrating a data transmission apparatus 1300 according to an example embodiment. For example, the apparatus 1300 may be provided as a server. Referring to fig. 5, apparatus 1300 includes a processing component 1322, which further includes one or more processors, and memory resources, represented by memory 1332, for storing instructions, such as application programs, that may be executed by processing component 1322. The application programs stored in memory 1332 may include one or more modules that each correspond to a set of instructions. Further, processing component 1322 is configured to execute instructions to perform the methods described above.

The apparatus 1300 may also include a power component 1326 configured to perform power management for the apparatus 1300, a wired or wireless network interface 1350 configured to connect the apparatus 1300 to a network, and an input-output (I/O) interface 1358. The apparatus 1300 may operate based on an operating system stored in the memory 1332, such as Windows Server, mac OS XTM, unixTM, linuxTM, freeBSDTM, or the like.

In an example embodiment, a non-transitory computer readable storage medium, such as a memory 1332, is also provided that includes computer program instructions executable by the processing component 1322 of the apparatus 1300 to perform the method described above.

The present disclosure may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to implement various aspects of the present disclosure.

The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as a punch card or an in-groove protruding structure with instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be interpreted as a transitory signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or an electrical signal transmitted through an electrical wire.

The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.

The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, the electronic circuitry that can execute the computer-readable program instructions implements aspects of the present disclosure by utilizing the state information of the computer-readable program instructions to personalize the electronic circuitry, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA).

Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.

These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.

The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A method of data transmission, the method comprising:

scheduling a plurality of transmitting and receiving nodes TRP to carry out data transmission when serving the same user equipment through one downlink control information DCI;

according to the indication of the DCI, carrying out rate matching on the data to be transmitted on the TRP and the rate matching resource;

the rate matching resource is valid for all TRPs; or,

the rate matching resources are respectively effective for each TRP; or,

the number of the rate matching resources is adapted to the number of TRPs, and the rate matching resources are respectively effective for each TRP;

the number of the rate matching resources is adapted to the number of TRPs, and the rate matching resources are respectively effective for each TRP, including:

for resource block RB level resources, the rate matching resources are realized through rate matching resource groups, namely RatematcchPattern group, the number of the RatematcchPattern group is adaptive to the number of TRPs, and all rate matching resources contained in each RatematcchPattern group are effective to the transmission data on the corresponding TRPs; or,

for resource element RE level resources, the rate matching resources are realized through a ZP CSI-RS resource set, the number of the ZP CSI-RS resource sets is adaptive to the number of TRPs, and all the rate matching resources contained in each ZP CSI-RS resource set are effective to the transmission data on the corresponding TRPs.

2. The data transmission method of claim 1, wherein the rate matching resource is valid for all TRPs, comprising:

for resource block RB level resources, the rate matching resources are implemented by a rate matching resource group ratemacchpatternrgroup, and all rate matching resources contained in the ratemacchpatternrgroup are valid for the transmission data on all TRPs; or,

for resource element RE level resources, the rate matching resources are realized through a zero-power channel state information reference signal ZP CSI-RS resource set, and all the rate matching resources contained in the ZP CSI-RS resource set are effective to the transmission data on all TRPs.

3. The data transmission method of claim 2, wherein rate matching the rate matching resources for the data to be transmitted on the TRP according to the indication of the DCI comprises:

for the RB level resource, the DCI is used for indicating whether the rateMetchPattern group is effective or not, and the data to be transmitted carries out rate matching on the corresponding rate matching resource contained in the rateMetchPattern group according to the indication result; or,

for the RE level resource, the DCI is used for indicating whether the ZP CSI-RS resource set takes effect or not, and the data to be transmitted carries out rate matching on the corresponding rate matching resource contained in the ZP CSI-RS resource set according to the indication result.

4. The data transmission method according to claim 1, wherein the rate matching resources, which are respectively valid for each TRP, comprise:

for resource block RB level resources, the rate matching resources are realized through a rate matching resource group, namely RatematcchPattern group, and each rate matching resource contained in the RatematcchPattern group is respectively effective to the transmission data on the corresponding TRP; or,

for resource element RE level resources, the rate matching resources are realized through a zero-power channel state information reference signal ZP CSI-RS resource set, and each rate matching resource contained in the ZP CSI-RS resource set is respectively effective to the transmission data on the corresponding TRP.

5. The data transmission method of claim 4, wherein rate-matching the data to be transmitted on the TRP to the rate-matched resource according to the indication of the DCI comprises:

for the RB level resource, the DCI is used for indicating whether the rateMetchPattern group takes effect or not, and the data to be transmitted carries out rate matching on the rate matching resource on the corresponding TRP contained in the rateMetchPattern group according to the indication result; or,

for the RE level resource, the DCI is used for indicating whether the ZP CSI-RS resource set takes effect or not, and the data to be transmitted carries out rate matching on the rate matching resource on the corresponding TRP contained in the ZP CSI-RS resource set according to the indication result.

6. The method for transmitting data according to claim 1, wherein rate matching the rate matching resources for the data to be transmitted on the TRP according to the indication of the DCI comprises:

for the RB level resource, the DCI is used for indicating whether rateMeatchPattern group is effective or not, and the data to be transmitted carries out rate matching on rate matching resources contained in the rateMeatchPattern group according to an indication result; or,

and for the RE level resource, the DCI is used for indicating whether the ZP CSI-RS resource set takes effect or not, and the data to be transmitted carries out rate matching on rate matching resources contained in the ZP CSI-RS resource set according to an indication result.

7. A data transmission apparatus, comprising:

a scheduling unit, configured to schedule, through one downlink control information DCI, a plurality of transceiving nodes TRP to perform data transmission when serving a same user equipment;

the rate matching unit is used for performing rate matching on the data to be transmitted on the TRP according to the indication of the DCI;

the rate matching resource is effective for all TRPs; or,

the rate matching resource is effective for each TRP respectively; or,

the number of the rate matching resources is adapted to the number of TRPs, and the rate matching resources are respectively effective to each TRP;

for resource element RE level resources, the rate matching resources are realized through a ZP CSI-RS resource set, the number of the ZP CSI-RS resource sets is adaptive to the number of TRPs, and all the rate matching resources contained in each ZP CSI-RS resource set are effective to the transmission data on the corresponding TRP.

8. The data transmission apparatus of claim 7, wherein the rate matching resource is valid for all TRPs, comprising:

9. The data transmission apparatus of claim 8, wherein the rate matching unit is configured to:

10. The data transmission apparatus of claim 7, wherein the rate matching resources, which are respectively valid for each TRP, comprise:

11. The data transmission apparatus of claim 10, wherein the rate matching unit is configured to:

for the RB level resource, the DCI is used for indicating whether rateMetchPattern group takes effect or not, and the data to be transmitted carries out rate matching on the rate matching resource on the corresponding TRP contained in the rateMetchPattern group according to the indication result; or,

12. The data transmission apparatus of claim 11, wherein the rate matching unit is configured to:

13. A data transmission apparatus, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the method of any one of claims 1-6.

14. A non-transitory computer readable storage medium having computer program instructions stored thereon, wherein the computer program instructions, when executed by a processor, implement the method of any of claims 1 to 6.