WO2021056312A1

WO2021056312A1 - Method and apparatus for determining data transmission mode, and device and storage medium

Info

Publication number: WO2021056312A1
Application number: PCT/CN2019/108064
Authority: WO
Inventors: 陈文洪; 史志华
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2021-04-01
Also published as: CN113632406A; CN113632406B

Abstract

Provided are a method and apparatus for determining a data transmission mode, and a device and a storage medium, relating to the technical field of communications. The method comprises: receiving downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH); and determining, according to new data transmission indication (NDI) information, carried in the DCI, of a closed transport block, a diversity transmission mode of the PDSCH. Since a diversity transmission mode only supports the transmission of a single transport block, a free bit in DCI can be used to carry NDI information, and the NDI information can be used to indicate the diversity transmission mode used, without any additional signaling overhead being needed; and dynamic switching between different transmission modes can be supported.

Description

Method, device, equipment and storage medium for determining data transmission mode

Technical field

This application relates to the field of communication technology, and in particular to a method, device, equipment, and storage medium for determining a data transmission mode.

Background technique

In order to improve the transmission reliability of PDSCH (Physical Downlink Shared Channel) and meet the requirements of URLLC (Ultra-reliable Low-latency Communication), NR (New Radio) system The PDSCH diversity transmission technology is introduced, that is, multiple repeated transmissions are performed on the PDSCH carrying the same data by occupying different physical resources.

Currently, the NR system can support a variety of different diversity transmission methods. For example, FDM (Frequency Division Multiplexing) or TDM (Time Division Multiplexing) methods can be used for diversity transmission. Among them, the FDM mode includes FDM mode 1 and FDM mode 2, and the TDM mode includes TDM mode 1 and TDM mode 2. Different diversity transmission methods are usually used for different application scenarios. For example, the FDM method can be applied to scenarios that require high transmission delay.

In the implementation, the network equipment needs to determine the adopted diversity transmission mode according to the current application scenario and indicate it to the terminal. In this way, how to indicate the adopted diversity transmission mode to the terminal to support dynamic switching between different modes has become a research hotspot. .

Summary of the invention

The embodiments of the present application provide a method, device, device, and storage medium for determining a data transmission mode, which can be used to solve the problem of distinguishing the diversity transmission mode. The technical solution is as follows:

On the one hand, a method for determining a data transmission mode is provided, which is applied to a terminal, and the method includes:

Receiving the downlink control information DCI used to schedule the physical downlink shared channel PDSCH;

Determine the diversity transmission mode of the PDSCH according to the new data transmission indication NDI information of the closed transport block carried in the DCI.

On the other hand, a method for determining a data transmission mode is provided, which is applied to a network device, and the method includes:

Sending downlink control information DCI for scheduling the physical downlink shared channel PDSCH, the DCI carrying new data transmission indication NDI information of the closed transport block, and the NDI information is used to determine the diversity transmission mode of the PDSCH.

On the other hand, a device for determining a data transmission mode is provided, which is applied to a terminal, and the device includes:

The receiving module is used to receive the downlink control information DCI used to schedule the physical downlink shared channel PDSCH;

The determining module is configured to determine the diversity transmission mode of the PDSCH according to the new data transmission indication NDI information of the closed transmission block carried in the DCI.

On the other hand, a device for determining a data transmission mode is provided, which is applied to a network device, and the device includes:

The sending module is used to send the downlink control information DCI used to schedule the physical downlink shared channel PDSCH, the DCI carries the new data transmission indication NDI information of the closed transmission block, and the NDI information is used to determine the diversity transmission of the PDSCH the way.

In another aspect, a device is provided, the device includes a processor and a memory, the memory stores at least one instruction, and the at least one instruction is configured to be executed by the processor to implement any one of the foregoing aspects. , Or implement any one of the methods described in the other aspect above.

In another aspect, a computer-readable storage medium has instructions stored on the computer-readable storage medium. The instructions are characterized in that, when the instructions are executed by a processor, the method described in any one of the above aspects is implemented, or The method of any one of the above other aspects.

The beneficial effects brought about by the technical solutions provided by the embodiments of the present application include at least:

Since the diversity transmission mode only supports the transmission of a single transmission block, the idle bits in the DCI can be used to carry NDI information. The NDI information can be used to indicate the diversity transmission mode used, without additional signaling overhead, and can Support dynamic switching of different transmission modes.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative work.

Fig. 1 is a schematic diagram of PDSCH data transmission provided by an exemplary embodiment of the present application;

FIG. 2 is a schematic diagram of PDSCH data transmission provided by another exemplary embodiment of the present application;

FIG. 3 is a schematic diagram of PDSCH data transmission provided by another exemplary embodiment of the present application;

FIG. 4 is a schematic diagram of PDSCH data transmission provided by another exemplary embodiment of the present application;

FIG. 5 is a schematic diagram of PDSCH data transmission provided by another exemplary embodiment of the present application;

FIG. 6 is a schematic diagram of PDSCH data transmission provided by another exemplary embodiment of the present application;

Fig. 7 is a schematic diagram of an implementation environment provided by an exemplary embodiment of the present application;

FIG. 8 is a flowchart of a method for determining a data transmission mode provided by an exemplary embodiment of the present application;

FIG. 9 is a flowchart of a method for determining a data transmission mode provided by another exemplary embodiment of the present application;

FIG. 10 is a flowchart of a method for determining a data transmission mode provided by another exemplary embodiment of the present application;

FIG. 11 is a schematic diagram of PDSCH data transmission provided by another exemplary embodiment of the present application;

FIG. 12 is a flowchart of a method for determining a data transmission mode provided by another exemplary embodiment of the present application;

FIG. 13 is a schematic structural diagram of an apparatus for determining a data transmission mode provided by another exemplary embodiment of the present application;

FIG. 14 is a schematic structural diagram of an apparatus for determining a data transmission mode provided by another exemplary embodiment of the present application;

Fig. 15 is a schematic structural diagram of a device provided by an exemplary embodiment of the present application.

detailed description

In order to make the objectives, technical solutions, and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below with reference to the accompanying drawings.

Before describing the methods provided in the embodiments of the present application in detail, a brief introduction to the related technologies and implementation environments involved in the embodiments of the present application will be given first.

First, a brief introduction is made to the related technologies involved in the embodiments of the present application.

Diversity transmission: It means that the PDSCH carrying the same data is transmitted multiple times by using different time slots, different TRP (Transmission/Reception Point), and different VR (Redundancy Version, redundancy version). Obtain diversity gain and reduce the probability of false detection. As an example, diversity transmission can be performed in multiple time slots, as shown in Figure 1. At this time, a DCI (Downlink Control Information) can schedule multiple PDSCHs carrying the same data in consecutive multiple For transmission on time slots, the same frequency domain resources are used, and the number of time slots can be configured through high-level signaling. As another example, diversity transmission can also be performed on multiple TRPs, as shown in Fig. 2. At this time, the PDSCH carrying the same data can be transmitted on different TRPs at the same time, and the network equipment can use different beams. When multiple TRPs are used for diversity transmission, a DCI needs to indicate multiple TCI states, and each TCI state is used to implement a repeated transmission of a data block. Each TCI state can be used to indicate the data used to receive the data. Scale parameters, beams, etc., for example, are used to indicate on which beam to receive data. In some embodiments, the diversity transmission of multiple TRPs can also be combined with multi-slot mode, that is, continuous time slots are used to transmit the same PDSCH, but different TRPs are used for transmission in different time slots. The transmission on the slot needs to adopt different TCI states, and the embodiment of the present application will introduce the diversity transmission of multiple TRPs.

For the diversity transmission of multiple TRPs, five different modes are entered in NR to obtain diversity gain by using different diversity transmission modes. Specifically include the following:

(1) SDM (Spatial Division Multiplexing) mode:

In SDM mode, network equipment can schedule data of up to 4 transmission layers. These data are transmitted separately from two TRPs using independent beams, that is, multiple TRPs use different DMRS (Demodulation Reference Signals) on the same physical resource, refer to The demodulation signal) port and beam transmit data in the same transmission block, where different beams correspond to different TCI states. In this case, the DMRS ports used for data transmission come from different CDM (Code Domain Multiplexing) groups, and the DMRS ports of different CDM groups use different TCI states, that is, one TRP corresponds to one CDM group and one TCI status.

(2) FDM method 1:

In the FDM mode, the network equipment can schedule the data of two transmission layers at most. These data are transmitted separately from the different frequency domain resources of the two TRPs using independent beams, that is, multiple TRPs are in different frequency domain resources of the same time domain resource. Above, the same DMRS port and different beams are used to transmit data in the same transmission block, as shown in Figure 3, where different beams correspond to different TCI states. In FDM mode 1, different TRPs transmit different parts of the same codeword on different frequency domain resources. That is to say, the network device can use RV to encode the same data block to obtain the codeword, and then The codeword is divided into multiple parts, and each part of the multiple parts is respectively transmitted in different frequency domain resources. In addition, unlike the SDM method, the DMRS ports used by different TRPs in the FDM method are the same, and the DMRS ports used for data transmission are from the same CDM group, that is, the same DMRS port corresponds to different frequency domain resources. TCI status.

(3) FDM method 2:

The main difference between FDM mode 2 and FDM mode 1 is that different TRPs transmit independent codewords on different frequency domain resources, rather than different data in the same codeword. Among them, the two codewords are from the same data block, but separate RVs are used to form different codewords, which are transmitted on different frequency domain resources, as shown in Figure 4. The encoded codewords transmitted by the two TRPs can be decoded independently, and the combined gain can also be obtained through soft bit combination, which is similar to two HARQ (Hybrid Automatic Repeat Request) of one transmission block.

(4) TDM method 1:

In this way, multiple TRPs send data blocks in multiple mini-slots (also called sub-slots) in one time slot. Correspondingly, multiple TRPs in one time slot send data blocks. Different TCI states are used on each mini-slot resource to receive data sent from different TRPs, as shown in Figure 5. Among them, one mini-slot may include several OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain resources occupied by the terminal in different mini-slots are the same. That is, multiple TRPs use the same DMRS port and different beams to transmit the same data on the same frequency domain resources in different minislots, where different beams correspond to different TCI states. The Modulation And Coding Scheme (MCS) adopted by the terminal in these mini-slots is the same, but the RV can be different. In this case, the terminal can also perform soft bit combination on data in different mini-slots.

(5) TDM method 2:

The difference between TDM mode 2 and TDM mode 1 is that the same data block is transmitted in different time slots, that is, multiple TRPs use the same DMRS port and different beams to transmit the same data on the same frequency domain resources in different time slots. , As shown in Figure 6, where different beams correspond to different TCI states.

It should be noted that the above five different diversity transmission modes are supported in the NR system, and different transmission modes can be used in different scenarios. For example, SDM and FDM methods can be used in scenarios that require high transmission delay. FDM method 2 is more suitable for scenarios where TRP is easily blocked; TDM can be used in scenarios with higher reliability requirements, of which TDM method 1 The transmission delay of TDM is shorter than that of TDM mode 2. In implementation, the network device needs to determine the used diversity transmission mode according to the current application scenario, and then indicate the used diversity transmission mode to the terminal. Among them, the SDM mode needs to configure multiple CDM groups, and the FDM and TDM modes are based on a single CDM group. It can be seen that, according to whether the DMRS ports used for data transmission are from the same CDM group, it can be determined whether the diversity transmission uses the SDM mode. However, when the DMRS ports used for data transmission are from the same CDM group, FDM or TDM may be used. Therefore, further judgment is required at this time. At this time, how to support different diversity transmission methods with the lowest signaling overhead (especially It is the flexible switch between FDM and TDM) that has become a research focus. To this end, the embodiment of the present application introduces the determination process of the diversity transmission mode in the case that the DMRS ports used for data transmission are from the same CDM group, and the specific implementation is described below.

Next, the implementation environment involved in the embodiments of the present application will be briefly introduced.

Please refer to FIG. 7, which is a schematic diagram showing an implementation environment according to an exemplary embodiment. The implementation environment mainly includes a terminal 110 and a network device 120. The terminal 110 can communicate with the network device 120 through a communication network. The terminal 110 can perform operations such as data reception according to the method provided in the embodiments of this application. The terminal 110 is any device that can realize data transmission. In some implementations, In an example, the terminal 110 may also be referred to as a UE (User Equipment, user equipment), which is not limited in the embodiment of the present application. The network device 120 may perform repeated data transmission through multiple TRPs.

After introducing the related technologies and implementation environment involved in the embodiments of the present application, the method for determining the data transmission mode provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 8, which is a flowchart of a method for determining a data transmission mode according to an exemplary embodiment. The method can be applied to the foregoing implementation environment. The method can include the following implementation steps:

Step 801: Receive DCI for scheduling PDSCH.

In the process of data transmission, the network equipment uses DCI to schedule the PDSCH. Illustratively, the DCI carries information related to demodulation and decoding of the PDSCH. The network equipment sends DCI to the terminal so that the terminal can determine how to receive it according to the DCI. Data carried by PDSCH.

Further, the DCI may be DCI used to schedule diversity transmission of PDSCH.

Step 802: Determine the diversity transmission mode of the PDSCH according to the new data transmission indication NDI information of the closed transport block carried in the DCI.

Among them, the closed transmission block refers to the transmission block not used for data transmission.

In the embodiment of the present application, the DCI may include information of two transmission blocks at most, and the information of each transmission block includes but is not limited to: MCS information, NDI information, and RV information. In some embodiments, if the value indicated by the MCS information of a transport block is 26 and the value indicated by the RV information is 1, it means that the transport block is closed. Since the PDSCH only supports the transmission of a single transport block during diversity transmission, one of the two transport blocks indicated by the DCI is always closed. The bit used to indicate the NDI information of the closed transport block is an idle bit. Bit. At this time, the network device can reuse the idle bit to indicate the diversity transmission mode of the PDSCH. Correspondingly, the terminal can determine the diversity transmission mode of the PDSCH according to the NDI information of the closed transmission block carried in the DCI.

Further, if the value of MCS information of a transport block is not 26, or the value of RV information is not 1, or the value of MCS information of a transport block is not 26 and the value of RV information is not 1, It means that the transmission block can be used for data transmission, and the NDI information is used to indicate whether the transmission block transmits new data.

In the embodiment of this application, since the diversity transmission mode only supports the transmission of a single transmission block, the idle bits in the DCI can be used to indicate the adopted diversity transmission mode, without additional signaling overhead, and can support Dynamic switching of different transmission modes.

As an example, according to the NDI (New Data Indicator) information of the closed transport block carried in the DCI, the terminal determines the diversity transmission mode of data with different TCI states in the PDSCH.

Among them, different TCI states correspond to different channel large-scale parameters or different beams. For network devices, different TCI states can be used to transmit different data. The terminal can use corresponding channel large-scale parameters or beams to receive data according to the TCI state adopted by the data. In the embodiment of this application, data with different TCI states is scheduled through the same DCI, that is, the DCI contains a TCI state indication field, and the TCI state indication field indicates that there are multiple TCI states, for example, in the TCI state indication field Indicate two TCI states, etc. Among them, the data using different TCI states may be repeated transmission of the PDSCH, or may be data transmitted by the PDSCH on different physical resources.

As an example, when multiple TCI states are indicated in the DCI, the terminal determines, according to the NDI information of the closed transport block carried in the DCI, a diversity transmission mode for data indicating the TCI state with different transmission configurations in the PDSCH. That is to say, when multiple TCI states are indicated in the DCI, the method provided in the embodiment of the present application can be used to determine the diversity transmission mode of the PDSCH. Further, when the DCI only indicates one TCI state, the PDSCH can be transmitted in a non-diversity transmission manner.

As another example, when multiple TCI states are indicated in the DCI and the DMRS ports indicated in the DCI belong to the same CDM group, it is determined that different TCIs are used in the PDSCH according to the NDI information of the closed transport block carried in the DCI Diversity transmission mode of status data. That is to say, in the application scenario that meets the above two conditions, the terminal uses the method provided in the embodiment of this application to determine the diversity transmission mode. Otherwise, if the DMRS ports of multiple CDM groups are indicated in the DCI, other diversity can be used. The transmission method, for example, can adopt the SDM method for diversity transmission, or directly adopt non-diversity transmission.

Among them, a CDM group includes at least one DMRS port occupying the same physical resource, and these DMRS ports use different sequences or different OCC (Orthogonal Cover Code) to ensure orthogonality. In other words, the frequency domain resources occupied by the DMRS ports in different CDM groups are different.

In another implementation manner, the terminal may determine whether to perform diversity transmission on the PDSCH according to the NDI information. For example, when the value indicated by the NDI information is 0, the terminal determines that the PDSCH does not perform diversity transmission; when the value indicated by the NDI information is 1, the terminal determines that the PDSCH performs diversity transmission. At this time, whether the TCI state is indicated in the DCI and the number of indicated TCI states may not be limited. In addition, in the embodiment of the present application, the terminal determines the diversity transmission mode of the PDSCH according to the NDI information, and is not limited to determining the diversity transmission mode of data with different TCI states. For example, it can also be used to determine the diversity transmission mode of data with the same TCI state in the PDSCH. For another example, it can also be used to determine the diversity transmission mode of the PDSCH, where the diversity transmission mode has nothing to do with the TCI state, which is not limited in the embodiment of the present application.

Please refer to FIG. 9, which is a flowchart of a method for determining a data transmission mode according to another exemplary embodiment. The method can be applied in the foregoing implementation environment. The method can include the following implementation steps:

Step 901: Receive DCI for scheduling PDSCH.

For specific implementation, refer to step 801 in the embodiment of FIG. 8 described above.

Step 902: According to the NDI information of the closed transport block carried in the DCI, determine whether the diversity transmission mode of the data with different TCI states in the PDSCH is the first diversity transmission mode or the second diversity transmission mode, and the first diversity transmission mode Different frequency domain resources are occupied for diversity transmission, and the second diversity transmission mode is to occupy different time domain resources for diversity transmission.

It should be noted that this step 902 may be used to determine the diversity transmission mode of the PDSCH according to the data transmission indication NDI information of the closed transport block carried in the DCI.

That is, the NDI information of the closed transport block in the DCI can have different values. According to the different values, it can be determined whether the data in the PDSCH with different TCI states adopts the first diversity transmission mode or the second diversity transmission method. The transmission mode is used for transmission, or in other words, according to its different values, it can be determined whether the data with different TCI states in the PDSCH occupies different frequency domain resources or occupies different time domain resources.

As an example, this step 902 may include the following two possible implementation manners:

The first implementation manner: when the value of the NDI information is the first value, it is determined that the data in the PDSCH with different TCI states occupy different frequency domain resources for diversity transmission.

The first value can be set according to actual needs, for example, the first value is 1 or 0.

That is to say, when the value of the NDI information is the first value, it can be determined that the data with different TCI states in the PDSCH is transmitted in the FDM mode. For example, when the value of the NDI information is 1, it can be determined that the data with different TCI states in the PDSCH is transmitted through FDM, or when the value of the NDI information is 0, it can be determined that the PDSCH The data in different TCI states are transmitted in FDM mode.

Further, when it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode, according to the FDM indication information configured by the network device, it is determined that the data with different TCI states in the PDSCH is in different The transmission mode adopted on frequency domain resources, wherein the FDM indication information is used to indicate the transmission mode adopted on different frequency domain resources for data with different TCI states, for example, used to indicate that the transmission mode is FDM mode 1 or FDM method 2.

As an example, the foregoing FDM indication information may be configured through high-level signaling. For example, the high-level signaling may be RRC (Radio Resource Control, radio resource control) signaling. In another embodiment, the FDM indication information may also be indicated by DCI signaling, which is not limited in the embodiment of the present application.

As mentioned above, since FDM includes FDM mode 1 and FDM mode 2, when it is determined according to the value of NDI information that the data with different TCI states in the PDSCH occupy different frequency domain resources for diversity transmission, it is also necessary Determine whether to use FDM mode 1 or FDM mode 2 for data transmission. At this time, the terminal can determine the transmission mode adopted on different frequency domain resources according to the FDM indication information.

Of course, the foregoing is only an example in which the first FDM and the second FDM are FDM mode 1 and FDM mode 2 respectively. In other embodiments, the first FDM may also be other FDM manners. Similarly, the second FDM may be another FDM manner different from the first FDM, which is not limited in the embodiment of the present application.

As an example, the transmission modes adopted on different frequency domain resources include at least one of the following: 1) Whether the RV used for data on different frequency domain resources is the same; 2) Data on different frequency domain resources Whether it can be decoded independently; 3) Whether the data on different frequency domain resources come from the same codeword; 4) Whether the data on different frequency domain resources use the same MCS; 5) The data on different frequency domain resources Whether to use the same number of transmission layers.

Among them, when the data on different frequency domain resources use the same RV, the data on the different frequency domain resources come from the same encoding codeword, and when the data on different frequency domain resources are encoded by different RVs, the different frequency domain resources are encoded with different RVs. The data on the domain resource comes from different encoding codewords. For example, in the FDM method 1 above, the data on different frequency domain resources uses the same RV. In the above FDM method 2, the data on different frequency domain resources uses different RVs, that is, different frequencies. The data using different TCI states on the domain resources comes from different encoding codewords of independent RV versions.

Among them, data on different frequency domain resources may use the same MCS, or different MCSs may also be used. When the same MCS is used or different MCSs are used, the corresponding transmission modes are also different.

The second implementation manner: when the value of the NDI is the second value, it is determined that the data in the PDSCH with different TCI states occupy different time domain resources for diversity transmission.

Wherein, the second value can be set according to actual needs, and the second value is different from the above-mentioned first value. For example, the second value can be 1 or 0.

That is, when the value of the NDI information is the second value, it can be determined that the data in the PDSCH with different TCI states is transmitted in the TDM mode. For example, when the value of the NDI information is 1, it can be determined that the data with different TCI states in the PDSCH is transmitted through TDM, or when the value of the NDI information is 0, it can be determined that the PDSCH The data in different TCI states are transmitted in TDM mode.

Further, when it is determined that the diversity transmission mode of data in different TCI states in the PDSCH is the second diversity transmission mode, the time domain resource occupied by the data in different TCI states in the PDSCH is determined according to the number of times of PDSCH time slot aggregation.

As mentioned above, since the TDM method includes TDM method 1 and TDM method 2, when it is determined according to the value of NDI information that the data in the PDSCH with different TCI states occupy different time domain resources for transmission, it is also necessary Determine whether to use TDM mode 1 or TDM mode 2 for data transmission. To this end, the terminal can determine the diversity transmission mode used on different time domain resources according to the number of times of PDSCH time slot aggregation, or in other words, determine the time domain resources occupied by data with different TCI states according to the number of times of PDSCH time slot aggregation Are different OFDM symbols in a time slot or occupy different time slots.

As an example, if the number of times of aggregation of the PDSCH slot is 1, it is determined that the data in the PDSCH with different TCI states occupy different OFDM symbols in the same slot. Or, if the number of times of aggregation of the PDSCH time slot is greater than 1, it is determined that the data in the PDSCH with different TCI states occupy different time slots.

The number of times of PDSCH time slot aggregation refers to the number of timeslot repetitions. The number of times of PDSCH time slot aggregation can be configured through high-level signaling and can be configured through RRC signaling. Furthermore, the pdsch-AggregationFactor parameter indicated by RRC signaling can be used. Determine the number of PDSCH timeslot aggregation currently used.

Exemplarily, when the number of times of aggregation of the PDSCH time slot is 1, it is determined that the data in the PDSCH using different TCI states occupy different OFDM symbols in the same time slot. Further, the data using the same TCI state can occupy one time slot. One or more OFDM in the slot accords with. Data with different TCI states can occupy several adjacent OFDM symbols in one slot. That is to say, data with different TCI states in the PDSCH occupies consecutively in one slot. Of multiple OFDM symbols. If the number of timeslot aggregations of the PDSCH is greater than 1, it is determined that the data in the PDSCH that adopts different TCI states occupies different time slots. Further, data that adopts the same TCI state can occupy one or more time slots, and use different TCI states The data in the PDSCH can occupy adjacent time slots, that is, the data in the PDSCH with different TCI states are continuous in the time domain.

Further, the terminal receives the PDSCH according to the diversity transmission mode indicated by the NDI information. As mentioned above, because the data of different TCI states in the PDSCH can occupy different frequency domain resources for transmission, it can also occupy different time domain resources for transmission. Depending on the physical resources occupied, the specific implementation of the terminal receiving PDSCH can include the following two One way to achieve:

The first implementation mode: When it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode, according to the information in the frequency domain resource indicator field in the DCI, determine the data with different TCI states The frequency domain resources occupied by each use different TCI states to receive the PDSCH on the determined frequency domain resources.

That is to say, the DCI also includes a frequency domain resource indicator field, and the information carried in the frequency domain resource indicator field can be used to indicate which frequency domain resource needs to be received on which PDSCH, or in other words, used to indicate which frequency domain needs to be received. The data carried by the PDSCH is received on the resource. The terminal receives the PDSCH on the corresponding frequency domain resource according to the information in the frequency domain resource indication field in the DCI.

Further, the specific implementation of using different TCI states for PDSCH reception on the determined frequency domain resources includes: when the data with different TCI states comes from the same coding codeword, codes are detected on different frequency domain resources Joint decoding is performed after the bits are concatenated. When data with different TCI states come from different codewords, the coded bits detected on different frequency domain resources are soft-combined and then decoded, or the coded bits on different frequency domain resources are decoded separately.

As mentioned above, in FDM mode 1, one RV code can be used for the same data block to obtain a coded codeword, and then the coded codeword can be divided into multiple parts, and each part of the multiple parts is in a different Transmission on frequency domain resources. In this case, for the terminal, if the data with different TCI states in the PDSCH comes from the same codeword, the terminal concatenates the coded bits detected on different frequency domain resources and then performs joint decoding.

For another example, in FDM mode 2, different RVs can be used to encode the same data block to obtain different codewords, and then different frequency domain resources are used to transmit the obtained different codewords. For the terminal, if the data with different TCI states in the PDSCH comes from different coded blocks using independent RV versions, the coded blocks detected by independent RV on different frequency domain resources are combined with soft bits before decoding, or , The terminal respectively decodes the data on different frequency domain resources to determine whether the data carried in the PDSCH is correctly detected.

The second implementation manner: when it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the second diversity transmission mode, different TCI states are used to receive the PDSCH on different time domain resources.

Further, if the data with different TCI states in the PDSCH occupies different OFDM symbols in the same time slot, the terminal uses different TCI states on different OFDM symbols in the same time slot to receive the PDSCH. For example, on OFDM symbols {4, 5, 6, 7}, TCI state 0 is used to receive PDSCH, and on OFDM symbols {8, 9, 10, 11}, TCI state 1 is used to receive PDSCH.

Further, if data in different TCI states in the PDSCH occupies different time slots, the terminal uses different TCI states in different time slots to receive PDSCH. For example, the TCI state 0 is used to receive the PDSCH on the time slot {0, 1}, and the TCI state 1 is used to receive the PDSCH on the time slot {2, 3}.

In the embodiment of the present application, since the diversity transmission mode only supports the transmission of a single transmission block, the idle NDI information in the DCI can be used to indicate the transmission mode used, without additional signaling overhead, and the dynamics of the mode are supported. Switch.

In addition, on the basis of indicating the TDM or FDM mode through the NDI information, the specific mode of TDM or FDM used by the high-level signaling can be further used to configure the specific mode of the used TDM or FDM, thereby flexibly supporting one of multiple diversity transmission modes through the combination of DCI information and high-level signaling Switch between.

Please refer to FIG. 10, which shows a method for determining a data transmission mode according to another exemplary embodiment. The method can be applied to the aforementioned implementation environment. The method can include the following implementation steps:

Step 1001: Receive DCI for scheduling PDSCH.

Step 1002: According to the NDI information of the closed transport block carried in the DCI, determine the transmission mode of the data with different TCI states in the PDSCH on different frequency domain resources.

It should be noted that this step 1002 is used to determine the diversity transmission mode of the PDSCH according to the new data transmission indication NDI information of the closed transport block carried in the DCI.

As mentioned above, when the transmission is performed on different frequency domain resources, it means that the FDM mode is adopted, that is, the data of different TCI states in the PDSCH occupies different frequency domain resources. However, in this case, the FDM mode also includes FDM mode 1 and FDM mode 2. Therefore, it is necessary to determine which diversity transmission mode is used.

As an example, the transmission modes adopted on different frequency domain resources include at least one of the following: 1) Whether the redundancy versions RV adopted for data on different frequency domain resources are the same. 2) Whether the data on different frequency domain resources can be decoded independently. 3) Whether the data on different frequency domain resources come from the same codeword. 4) Whether the data on different frequency domain resources use the same MCS. 5) Whether the data on different frequency domain resources use the same number of transmission layers.

As an example, the specific implementation of determining the transmission mode of data in the PDSCH with different TCI states on different frequency domain resources according to NDI information may include: when the value of the NDI information is a third value, determining that the PDSCH is in the PDSCH Data with different TCI states comes from the same coding block or adopts the same RV. When the value of the NDI information is the fourth value, it is determined that the data with different TCI states in the PDSCH comes from different coding blocks or adopts different RVs.

Wherein, the third value and the fourth value can be set according to actual needs, and the third value is different from the fourth value. For example, the third value can be 0, the fourth value is 1, or the first value The third value can be 1, and the fourth value is 0.

Exemplarily, if the value of the NDI information is 0, the data in different TCI states are from the same codeword or the same RV. For example, the diversity transmission mode used at this time is the aforementioned FDM mode 1. If the value of the NDI information is 1, the data with different TCI states comes from different codewords or different RVs. For example, the diversity transmission mode used at this time is the aforementioned FDM mode 2. For another example, if the value of the NDI information is 0, the data with different TCI states come from different codewords or different RVs. If the value of the NDI information is 1, the data with different TCI states comes from the same one. Encode the codeword or use the same RV. Wherein, the source bit information carried by different encoded codewords is the same, and the source bit information is the data before encoding. As shown in FIG. 11, the NDI information can be used to determine the transmission mode used on the first frequency domain resource and the second frequency domain resource.

Further, when it is determined that the data with different TCI states in the PDSCH comes from the same codeword or the same RV, the coded bits detected on different frequency domain resources are concatenated and then jointly decoded. When it is determined that the data with different TCI states in the PDSCH comes from different codewords or different RVs, the coded bits detected on the different frequency domain resources are soft-bit combined and then decoded.

Further, the data with different TCI states in the PDSCH is transmitted using the same time domain resource and the same DMRS port. That is to say, in this embodiment, the network device uses the same DMRS port to send data in the PDSCH on the same time domain resource and different frequency domain resources. For example, the DMRS port indicated by the DMRS port indication field included in the DCI belongs to The same CDM group. Further, data using different TCI states are transmitted using the same MCS.

Further, when the local end has the soft bit combining capability, according to the NDI information, the transmission mode used on different frequency domain resources for data with different TCI states in the PDSCH is determined. That is to say, the terminal may use the method provided in this embodiment to determine the diversity transmission mode when reporting that it has the soft bit combining capability. As an example, when the local terminal does not have the soft bit combining capability, FDM mode 1 can be directly used to receive the PDSCH, that is, it is not necessary to make judgments based on NDI information.

Of course, it should be noted that the above is only an example of using the method of this embodiment to determine the diversity transmission mode with the soft bit combining capability at the local end. In another embodiment, regardless of whether the terminal supports the soft bit combining capability , The method of this embodiment can be used to determine the adopted FDM transmission mode.

In one embodiment, when multiple TCI states are indicated in the DCI and the DMRS ports indicated in the DCI belong to the same CDM group, the terminal determines, according to the NDI information, which data with different TCI states are used on different frequency domain resources transfer method. If a single TCI state is indicated in the DCI or the DMRS port indicated in the DCI belongs to multiple CDM groups, the method provided in this embodiment may not be used to determine the FDM mode to be used, but the TDM or SDM mode or non-diversity transmission mode can be directly used .

It should be noted that, in this embodiment, it is possible to determine whether the data in the PDSCH with different TCI states occupy different frequency domain resources or occupy different time domain resources for transmission in other ways, that is, to indicate the PDSCH in other ways. The diversity transmission mode of data with different TCI states is the first diversity transmission mode or the second diversity transmission mode. For example, it can be indicated by newly-added signaling, which is not limited in the embodiment of the present application.

In the embodiment of this application, since the diversity transmission mode only supports the transmission of a single transmission block, the NDI bits in the closed transmission block belong to idle bits, so the idle bits can be used to indicate the FDM mode used without additional information. It also supports dynamic switching of modes. In this way, when TRP has occlusion, or when the coding rate is low, FDM mode 2 can be used to achieve a lower error rate. When the coding rate is high or there is no occlusion, FDM mode 1 can be used to achieve a lower error rate. Bit rate.

Please refer to FIG. 12, which is a flowchart of a method for determining a data transmission method according to another exemplary embodiment. The method can be applied in the foregoing implementation environment. The method can include the following implementation steps:

Step 1201: Receive DCI for scheduling PDSCH.

Step 1202: According to the NDI information of the closed transport block carried in the DCI, determine the time domain resources occupied by the data with different TCI states in the PDSCH.

Wherein, the TCI state indication field included in the DCI indicates multiple TCI states, for example, indicates two TCI states. Different TCI states are used for repeated transmission of data carried by the PDSCH, that is, DCI schedules PDSCH to be repeatedly transmitted in the time domain, and PDSCHs transmitted on different time domain resources adopt different TCI states. In other words, in this embodiment, the PDSCH uses the aforementioned TDM diversity transmission mode for data transmission.

Further, according to the NDI information, the specific implementation of determining the time domain resources occupied by data with different TCI states in the PDSCH may include: when the value of the NDI information is the fifth value, determining that the PDSCH adopts different TCI states Data occupies different OFDM symbols in a slot. Further, data using the same TCI state may occupy one or more OFDM symbols in one time slot, and data using different TCI states may occupy several adjacent OFDM symbols in one time slot. When the value of the NDI information is the sixth value, it is determined that the data in the PDSCH with different TCI states occupy different time slots. Further, data in the same TCI state can occupy one or more time slots, and data in different TCI states can occupy adjacent time slots, that is to say, the data in the PDSCH with different TCI states are in the time domain. Is continuous.

In another implementation manner, when the value of the NDI information is the fifth value, it can be determined that the data in the PDSCH with different TCI states occupy adjacent OFDM symbols. These OFDM symbols can be in one slot or span multiple slots.

Wherein, the fifth value and the sixth value can be set according to actual needs, and the fifth value is different from the sixth number. For example, the fifth value can be 1, the sixth value is 0, or the first The five value can be 0, and the sixth value is 1.

That is, the terminal can determine whether the above-mentioned TDM mode 1 or TDM mode 2 is used for the PDSCH according to the value of the NDI information. Exemplarily, if the value of NDI information is 0, it can be determined that data with different TCI states occupy different OFDM symbols in the same time slot; if the value of NDI information is 1, it can be determined that data with different TCI states are used. Data occupies different time slots. For another example, if the value of NDI information is 0, it can be determined that data in different TCI states occupy different time slots. If the value of NDI is 1, it can be determined that data in different TCI states occupy the same time slot. Different OFDM symbols.

Among them, when data with different TCI states occupies different OFDM symbols in the time slot, the total number of OFDM symbols occupied by PDSCH can be indicated by DCI, for example, it can be determined by the number of TCI states indicated in DCI, such as PDSCH The total number of occupied OFDM symbols may be the number of TCI states indicated in the DCI multiplied by the number of OFDM symbols occupied by each repeated transmission. When data with different TCI states occupies different time slots, the total number of time slots occupied by PDSCH can be indicated by DCI, or it can be indicated by the number of times of aggregation of PDSCH time slots in RRC signaling, for example, the number of timeslots occupied by PDSCH The total number of time slots may be the number of times of PDSCH time slot aggregation in RRC signaling.

Further, the data with different TCI states in the PDSCH is transmitted using the same MCS, the same frequency domain resources, and the same DMRS port.

Further, when multiple TCI states are indicated in the DCI and the DMRS ports indicated in the DCI belong to the same CDM group, the diversity transmission mode of the PDSCH is determined according to the NDI information of the closed transport block carried in the DCI. In other words, this embodiment can be used in a scenario where a single CDM group is indicated in the DCI.

Further, if a single TCI state is indicated in the DCI, or the DMRS ports of multiple CDM groups are indicated in the DCI, other diversity transmission methods can be used, for example, FDM or SDM methods can be used, or non-diversity transmission can be used directly the way.

As an example, when multiple TCI states are indicated in the DCI and the DMRS ports indicated in the DCI belong to the same CDM group, according to the NDI information of the closed transport block carried in the DCI, it is determined that the data in the PDSCH with different TCI states is occupied Time domain resources.

Further, the terminal receives the PDSCH according to the time domain resources occupied by the data in different TCI states. Specifically, if data in different TCI states occupies different OFDM symbols in the same time slot, the terminal uses different TCI states on different OFDM symbols in the same time slot to receive PDSCH. If data in different TCI states occupies different time slots, the terminal uses different TCI states on different time slots to receive PDSCH.

In the embodiment of this application, since the diversity transmission mode only supports the transmission of a single transport block, the NDI bits in the closed transport block belong to idle bits. Therefore, the NDI bit can be used to indicate the adopted TDM mode without additional information. It also supports dynamic switching between modes. In this way, when the transmission delay required by the service is short, TDM mode 1 can be used to meet the transmission delay requirements. When the reliability of the service requirement is high, TDM mode 2 can be used to achieve higher reliability, thereby satisfying For different needs, dynamic switching between multiple diversity transmission modes is performed, and the optimal diversity transmission mode is adopted to ensure that the transmission performance meets the corresponding requirements.

It should be noted that the foregoing description is based on an example in which the method for determining the data transmission mode is executed by the terminal. For the network device, the implementation principle is similar to that of the terminal. Exemplarily, the execution process of the network device may include the following implementation steps:

Step A1: Send the DCI used to schedule the PDSCH, the DCI carries the NDI information of the closed transport block, and the NDI information is used to determine the diversity transmission mode of the PDSCH.

As an example, the NDI information is used to indicate that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode or the second diversity transmission mode, and the first diversity transmission mode occupies different frequency domain resources. Diversity transmission is performed, and the second diversity transmission mode is to occupy different time domain resources for diversity transmission.

Further, when the value of the NDI information is the first value, the NDI information is used to indicate that the data in the PDSCH with different TCI states occupy different frequency domain resources for diversity transmission. When the value of the NDI information is the second value, the NDI information is used to indicate that the data in the PDSCH that adopts different TCI states occupies different time domain resources for diversity transmission.

In a possible implementation manner of the present application, the NDI information is used to indicate the transmission manner of data with different TCI states in the PDSCH on different frequency domain resources.

In a possible implementation manner of the present application, the NDI information is used to indicate time domain resources occupied by data in different TCI states in the PDSCH.

It should be noted that the foregoing is only an exemplary illustration of several implementation manners on the network device side. For other implementation manners of the network device, reference may be made to the foregoing implementation on the terminal side, which will not be repeated here.

In the embodiment of this application, since the diversity transmission mode only supports the transmission of a single transmission block, the NDI information in the DCI can be used to indicate the adopted diversity transmission mode without additional signaling overhead, and it can support different transmission modes. Dynamic switching.

Please refer to FIG. 13, which is a schematic structural diagram of a device for determining a data transmission manner according to an exemplary embodiment, which is configured in a terminal, and the device includes:

The receiving module 1310 is configured to receive downlink control information DCI for scheduling the physical downlink shared channel PDSCH;

The determining module 1320 is configured to determine the diversity transmission mode of the PDSCH according to the new data transmission indication NDI information of the closed transmission block carried in the DCI.

In a possible implementation manner of this application, the determining module 1320 is configured to:

According to the NDI information, it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode or the second diversity transmission mode, and the first diversity transmission mode is to occupy different frequency domain resources for diversity. For transmission, the second diversity transmission mode is to occupy different time domain resources for diversity transmission.

When the value of the NDI information is the first value, it is determined that the data in the PDSCH that adopts different TCI states occupies different frequency domain resources for diversity transmission;

When the value of the NDI information is the second value, it is determined that the data in the PDSCH with different TCI states occupy different time domain resources for diversity transmission.

In a possible implementation manner of this application, the determining module 1320 is further configured to:

When it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode, according to the FDM indication information, it is determined that the data with different TCI states in the PDSCH is on different frequency domain resources. The transmission method used.

In a possible implementation manner of this application, the receiving module 1310 is further configured to:

When it is determined that the diversity transmission mode of the data with different TCI states in the PDSCH is the first diversity transmission mode, determine the data with the different TCI states according to the information in the frequency domain resource indicator field in the DCI Frequency domain resources occupied by each;

Different TCI states are used to receive the PDSCH on the determined frequency domain resources.

When it is determined that the diversity transmission mode of the data in the PDSCH with different TCI states is the second diversity transmission mode, the time domain resources occupied by the data in the PDSCH with the different TCI states are determined according to the number of times of PDSCH time slot aggregation.

If the number of times of PDSCH time slot aggregation is 1, it is determined that the data in the PDSCH with different TCI states occupy different OFDM symbols in the same time slot; or,

If the number of times of aggregation of the PDSCH time slot is greater than 1, it is determined that the data in the PDSCH with different TCI states occupy different time slots.

When it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the second diversity transmission mode, different TCI states are used on different time domain resources to receive the PDSCH.

According to the NDI information, determine the transmission mode of the data with different TCI states in the PDSCH on different frequency domain resources.

In a possible implementation manner of this application, the transmission manners adopted on different frequency domain resources include at least one of the following:

Whether the redundancy version RV used for data on different frequency domain resources is the same;

Whether the data on different frequency domain resources can be decoded independently;

Whether the data on different frequency domain resources come from the same codeword;

Whether the data on different frequency domain resources adopt the same modulation and coding strategy MCS;

Whether the data on different frequency domain resources use the same number of transmission layers.

When the value of the NDI information is the third value, it is determined that the data using different TCI states in the PDSCH comes from the same codeword or the same RV;

When the value of the NDI information is the fourth value, it is determined that the data in the PDSCH that adopts different TCI states comes from different codewords or adopts different RVs.

When it is determined that the data with different TCI states in the PDSCH comes from the same codeword or the same RV, the coded bits detected on the different frequency domain resources are concatenated and then jointly decoded;

When it is determined that the data with different TCI states in the PDSCH comes from different codewords or different RVs, the coded bits detected on different frequency domain resources are soft-bit combined and then decoded.

In a possible implementation manner of the present application, the data in the PDSCH with different TCI states is transmitted using the same time domain resource and the same DMRS port.

When the local end has the soft bit combining capability, according to the NDI information, determine the transmission mode adopted on different frequency domain resources for the data with different TCI states in the PDSCH.

According to the NDI information, the time domain resources occupied by the data in the PDSCH with different TCI states are determined.

When the NDI information includes the fifth value, it is determined that the data in the PDSCH with different TCI states occupies different OFDM symbols in one time slot;

When the NDI information includes a sixth value, it is determined that the data in the PDSCH in different TCI states occupy different time slots.

In a possible implementation manner of the present application, data in the PDSCH with different TCI states are transmitted using the same MCS, the same frequency domain resources, and the same DMRS port.

When multiple TCI states are indicated in the DCI and the demodulation reference signal DMRS ports indicated in the DCI belong to the same code-domain multiplexing CDM group, determine all the NDI information of the closed transport block carried in the DCI. The diversity transmission mode of the PDSCH is described.

In the embodiment of this application, since the diversity transmission mode only supports the transmission of a single transmission block, the idle bits in the DCI can be used to carry NDI information. The NDI information can be used to indicate the adopted diversity transmission mode without additional It can support the dynamic switching of different transmission modes.

Please refer to FIG. 14, which is a schematic structural diagram of an apparatus for determining a data transmission mode according to an exemplary embodiment, which is applied to a network device, and the apparatus includes:

The sending module 1410 is configured to send downlink control information DCI used to schedule the physical downlink shared channel PDSCH, the DCI carries new data transmission indication NDI information of the closed transport block, and the NDI information is used to determine the diversity of the PDSCH transfer method.

In a possible implementation manner of the present application, the NDI information is used to indicate that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode or the second diversity transmission mode, and the first diversity transmission mode is The transmission mode is to occupy different frequency domain resources for diversity transmission, and the second diversity transmission mode is to occupy different time domain resources for diversity transmission.

In a possible implementation of this application,

When the value of the NDI information is the first value, the NDI information is used to indicate that the data in the PDSCH that adopts different TCI states occupies different frequency domain resources for diversity transmission;

When the value of the NDI information is the second value, the NDI information is used to indicate that the data in the PDSCH with different TCI states occupy different time domain resources for diversity transmission.

In a possible implementation manner of the present application, the NDI information is used to indicate the transmission manner of the data with different TCI states in the PDSCH on different frequency domain resources.

Please refer to FIG. 15, which shows a schematic structural diagram of a device provided by an exemplary embodiment of the present application. The device may be the aforementioned network device or a UE. The device includes: a processor 1501, a receiver 1502, a transmitter 1503, a memory 1504, and a bus 1505.

The processor 1501 includes one or more processing cores, and the processor 1501 executes various functional applications and information processing by running software programs and modules.

The receiver 1502 and the transmitter 1503 may be implemented as a communication component, and the communication component may be a communication chip.

The memory 1504 is connected to the processor 1501 through a bus 1505.

The memory 1504 may be used to store at least one instruction, and the processor 1501 is used to execute the at least one instruction, so as to implement each step executed by the device in each of the foregoing method embodiments.

In addition, the memory 1504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. The volatile or non-volatile storage device includes, but is not limited to: magnetic disks or optical disks, electrically erasable and programmable Read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static anytime access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM) .

The present application provides a computer-readable storage medium in which at least one instruction is stored, and the at least one instruction is loaded and executed by the processor to implement the methods provided in the foregoing method embodiments.

This application also provides a computer program product, which when the computer program product runs on a computer, causes the computer to execute the methods provided in the foregoing method embodiments.

A person of ordinary skill in the art can understand that all or part of the steps in the above embodiments can be implemented by hardware, or by a program to instruct relevant hardware. The program can be stored in a computer-readable storage medium. The storage medium mentioned can be a read-only memory, a magnetic disk or an optical disk, etc.

The above descriptions are only preferred embodiments of this application, and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims

A method for determining a data transmission mode, characterized in that it is applied to a terminal, and the method includes:

Receiving the downlink control information DCI used to schedule the physical downlink shared channel PDSCH;

Determine the diversity transmission mode of the PDSCH according to the new data transmission indication NDI information of the closed transport block carried in the DCI.
The method according to claim 1, wherein the determining the diversity transmission mode of the PDSCH according to the new data transmission indication NDI information of the closed transport block carried in the DCI comprises:

According to the NDI information, it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode or the second diversity transmission mode, and the first diversity transmission mode is to occupy different frequency domain resources for diversity. For transmission, the second diversity transmission mode is to occupy different time domain resources for diversity transmission.
The method according to claim 2, wherein the determining, according to the NDI information, that the diversity transmission mode of the data with different TCI states in the PDSCH is the first diversity transmission mode or the second diversity transmission mode, comprises :

When the value of the NDI information is the first value, it is determined that the data in the PDSCH that adopts different TCI states occupies different frequency domain resources for diversity transmission;

When the value of the NDI information is the second value, it is determined that the data in the PDSCH with different TCI states occupy different time domain resources for diversity transmission.
The method according to claim 2, wherein the method further comprises:

When it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode, according to the FDM indication information configured by the network device, it is determined that the data with different TCI states in the PDSCH is in different The transmission method used on frequency domain resources.
The method according to any one of claims 2-4, wherein the method further comprises:

When it is determined that the diversity transmission mode of the data with different TCI states in the PDSCH is the first diversity transmission mode, determine the data with the different TCI states according to the information in the frequency domain resource indicator field in the DCI Frequency domain resources occupied by each;

Different TCI states are used to receive the PDSCH on the determined frequency domain resources.
The method according to claim 2, wherein the method further comprises:

When it is determined that the diversity transmission mode of data in the PDSCH with different TCI states is the second diversity transmission mode, the time domain resources occupied by the data in the PDSCH with the different TCI states are determined according to the number of times of PDSCH time slot aggregation.
The method according to claim 6, wherein the determining the time domain resources occupied by data in the PDSCH using different TCI states according to the number of times of PDSCH time slot aggregation includes:

If the number of times of PDSCH time slot aggregation is 1, it is determined that the data in the PDSCH with different TCI states occupy different OFDM symbols in the same time slot; or,

If the number of times of aggregation of the PDSCH time slot is greater than 1, it is determined that the data in the PDSCH with different TCI states occupy different time slots.
The method according to claim 6 or 7, wherein the method further comprises:

When it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the second diversity transmission mode, different TCI states are used on different time domain resources to receive the PDSCH.
The method according to claim 1, wherein the determining the diversity transmission mode of the PDSCH according to the new data transmission indication NDI information of the closed transport block carried in the DCI comprises:

According to the NDI information, determine the transmission mode of the data with different TCI states in the PDSCH on different frequency domain resources.
The method according to claim 4 or 9, wherein the transmission modes adopted on different frequency domain resources include at least one of the following:

Whether the redundancy version RV used for data on different frequency domain resources is the same;

Whether the data on different frequency domain resources can be decoded independently;

Whether the data on different frequency domain resources come from the same codeword;

Whether the data on different frequency domain resources adopt the same modulation and coding strategy MCS;

Whether the data on different frequency domain resources use the same number of transmission layers.
The method according to claim 9 or 10, wherein the determining, according to the NDI information, the transmission mode of data with different TCI states in the PDSCH on different frequency domain resources comprises:

When the value of the NDI information is the third value, it is determined that the data using different TCI states in the PDSCH comes from the same codeword or the same RV;

When the value of the NDI information is the fourth value, it is determined that the data in the PDSCH that adopts different TCI states comes from different codewords or adopts different RVs.
The method of claim 11, wherein the method further comprises:

When it is determined that the data with different TCI states in the PDSCH comes from the same codeword or the same RV, the coded bits detected on the different frequency domain resources are concatenated and then jointly decoded;

When it is determined that the data with different TCI states in the PDSCH comes from different codewords or different RVs, the coded bits detected on different frequency domain resources are soft-bit combined and then decoded.
The method according to any one of claims 9-12, wherein the data in the PDSCH with different TCI states is transmitted using the same time domain resource and the same DMRS port.
The method according to any one of claims 9-13, wherein the method further comprises:

When the local end has the soft bit combining capability, according to the NDI information, determine the transmission mode adopted on different frequency domain resources for the data with different TCI states in the PDSCH.
The method according to claim 1, wherein determining the diversity transmission mode of the PDSCH according to the new data transmission indication NDI information of the closed transport block carried in the DCI comprises:

According to the NDI information, the time domain resources occupied by the data in the PDSCH with different TCI states are determined.
The method according to claim 15, wherein the determining, according to the NDI information, the time domain resources occupied by the data in the PDSCH with different TCI states comprises:

When the value of the NDI information is the fifth value, it is determined that the data in the PDSCH that adopts different TCI states occupies different OFDM symbols in one time slot;

When the value of the NDI information is the sixth value, it is determined that the data in the PDSCH in different TCI states occupy different time slots.
The method according to claim 15 or 16, wherein the data in the PDSCH with different TCI states are transmitted using the same MCS, the same frequency domain resources, and the same DMRS port.
The method according to any one of claims 1-17, wherein the method further comprises:

When multiple TCI states are indicated in the DCI and the demodulation reference signal DMRS ports indicated in the DCI belong to the same code-domain multiplexing CDM group, determine all the NDI information of the closed transport block carried in the DCI. The diversity transmission mode of the PDSCH is described.
A method for determining a data transmission mode, characterized in that it is applied to a network device, and the method includes:

Sending downlink control information DCI for scheduling the physical downlink shared channel PDSCH, the DCI carrying new data transmission indication NDI information of the closed transport block, and the NDI information is used to determine the diversity transmission mode of the PDSCH.
The method according to claim 19, wherein the NDI information is used to indicate that the diversity transmission mode of the data with different TCI states in the PDSCH is the first diversity transmission mode or the second diversity transmission mode, and the second diversity transmission mode is The first diversity transmission mode occupies different frequency domain resources for diversity transmission, and the second diversity transmission mode occupies different time domain resources for diversity transmission.
The method of claim 20, wherein:

When the value of the NDI information is the first value, the NDI information is used to indicate that the data in the PDSCH that adopts different TCI states occupies different frequency domain resources for diversity transmission;

When the value of the NDI information is the second value, the NDI information is used to indicate that the data in the PDSCH with different TCI states occupy different time domain resources for diversity transmission.
The method according to claim 19, wherein the NDI information is used to indicate the transmission mode of data with different TCI states in the PDSCH on different frequency domain resources.
The method according to claim 19, wherein the NDI information is used to indicate time domain resources occupied by data in the PDSCH with different TCI states.
A device for determining a data transmission mode is characterized in that it is applied to a terminal, and the device includes:

The receiving module is used to receive the downlink control information DCI used to schedule the physical downlink shared channel PDSCH;

The determining module is configured to determine the diversity transmission mode of the PDSCH according to the new data transmission indication NDI information of the closed transmission block carried in the DCI.
The device according to claim 24, wherein the determining module is configured to:

According to the NDI information, it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode or the second diversity transmission mode, and the first diversity transmission mode is to occupy different frequency domain resources for diversity. For transmission, the second diversity transmission mode is to occupy different time domain resources for diversity transmission.
The device according to claim 25, wherein the determining module is configured to:

When the value of the NDI information is the first value, it is determined that the data in the PDSCH that adopts different TCI states occupies different frequency domain resources for diversity transmission;

When the value of the NDI information is the second value, it is determined that the data in the PDSCH with different TCI states occupy different time domain resources for diversity transmission.
The device according to claim 25, wherein the determining module is further configured to:

When it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode, according to the FDM indication information configured by the network device, it is determined that the data with different TCI states in the PDSCH is in different The transmission method used on frequency domain resources.
The device according to any one of claims 25-27, wherein the receiving module is further configured to:

When it is determined that the diversity transmission mode of the data with different TCI states in the PDSCH is the first diversity transmission mode, determine the data with the different TCI states according to the information in the frequency domain resource indicator field in the DCI Frequency domain resources occupied by each;

Different TCI states are used to receive the PDSCH on the determined frequency domain resources.
The device according to claim 25, wherein the determining module is further configured to:

When it is determined that the diversity transmission mode of data in the PDSCH with different TCI states is the second diversity transmission mode, the time domain resources occupied by the data in the PDSCH with the different TCI states are determined according to the number of times of PDSCH time slot aggregation.
The device of claim 29, wherein the determining module is configured to:

If the number of times of PDSCH time slot aggregation is 1, it is determined that the data in the PDSCH with different TCI states occupy different OFDM symbols in the same time slot; or,

If the number of times of aggregation of the PDSCH time slot is greater than 1, it is determined that the data in the PDSCH with different TCI states occupy different time slots.
The device according to claim 29 or 30, wherein the receiving module is further configured to:

When it is determined that the diversity transmission mode of data with different TCI states in the PDSCH is the second diversity transmission mode, different TCI states are used on different time domain resources to receive the PDSCH.
The device according to claim 24, wherein the determining module is configured to:

According to the NDI information, determine the transmission mode of the data with different TCI states in the PDSCH on different frequency domain resources.
The apparatus according to claim 27 or 32, wherein the transmission mode adopted on different frequency domain resources includes at least one of the following:

Whether the redundancy version RV used for data on different frequency domain resources is the same;

Whether the data on different frequency domain resources can be decoded independently;

Whether the data on different frequency domain resources come from the same codeword;

Whether the data on different frequency domain resources adopt the same modulation and coding strategy MCS;

Whether the data on different frequency domain resources use the same number of transmission layers.
The device according to claim 32 or 33, wherein the determining module is configured to:

When the value of the NDI information is the third value, it is determined that the data using different TCI states in the PDSCH comes from the same codeword or the same RV;

When the value of the NDI information is the fourth value, it is determined that the data in the PDSCH that adopts different TCI states comes from different codewords or adopts different RVs.
The device of claim 34, wherein the receiving module is further configured to:

When it is determined that the data with different TCI states in the PDSCH comes from the same codeword or the same RV, the coded bits detected on the different frequency domain resources are concatenated and then jointly decoded;

When it is determined that the data with different TCI states in the PDSCH comes from different codewords or different RVs, the coded bits detected on different frequency domain resources are soft-bit combined and then decoded.
The apparatus according to any one of claims 32-35, wherein the data in the PDSCH with different TCI states is transmitted using the same time domain resource and the same DMRS port.
The device according to any one of claims 32-36, wherein the determining module is configured to:

When the local end has the soft bit combining capability, according to the NDI information, determine the transmission mode adopted on different frequency domain resources for the data with different TCI states in the PDSCH.
The device according to claim 24, wherein the determining module is configured to:

According to the NDI information, the time domain resources occupied by the data in the PDSCH with different TCI states are determined.
The device of claim 38, wherein the determining module is configured to:

When the NDI information includes the fifth value, it is determined that the data in the PDSCH with different TCI states occupies different OFDM symbols in one time slot;

When the NDI information includes a sixth value, it is determined that the data in the PDSCH in different TCI states occupy different time slots.
The apparatus according to claim 38 or 39, wherein the data in the PDSCH with different TCI states are transmitted using the same MCS, the same frequency domain resources, and the same DMRS port.
The device according to any one of claims 24-40, wherein the determining module is further configured to:

When multiple TCI states are indicated in the DCI and the demodulation reference signal DMRS ports indicated in the DCI belong to the same code-domain multiplexing CDM group, determine all the NDI information of the closed transport block carried in the DCI. The diversity transmission mode of the PDSCH is described.
A device for determining a data transmission mode is characterized in that it is applied to a network device, and the device includes:

The sending module is used to send the downlink control information DCI used to schedule the physical downlink shared channel PDSCH, the DCI carries the new data transmission indication NDI information of the closed transmission block, and the NDI information is used to determine the diversity transmission of the PDSCH the way.
The apparatus according to claim 42, wherein the NDI information is used to indicate that the diversity transmission mode of data with different TCI states in the PDSCH is the first diversity transmission mode or the second diversity transmission mode, and the second diversity transmission mode is The first diversity transmission mode is to occupy different frequency domain resources for diversity transmission, and the second diversity transmission mode is to occupy different time domain resources for diversity transmission.
The device of claim 43, wherein:

When the value of the NDI information is the first value, the NDI information is used to indicate that the data in the PDSCH that adopts different TCI states occupies different frequency domain resources for diversity transmission;

When the value of the NDI information is the second value, the NDI information is used to indicate that the data in the PDSCH with different TCI states occupy different time domain resources for diversity transmission.
The apparatus according to claim 42, wherein the NDI information is used to indicate a transmission mode of data with different TCI states in the PDSCH on different frequency domain resources.
The apparatus according to claim 42, wherein the NDI information is used to indicate time domain resources occupied by data in the PDSCH with different TCI states.
A device, characterized in that the device comprises a processor and a memory, the memory stores at least one instruction, and the at least one instruction is used to be executed by the processor to implement the one described in any one of claims 1-18. The method described above, or to implement the method described in any one of claims 19-23.
A computer-readable storage medium having instructions stored on the computer-readable storage medium, characterized in that, when the instructions are executed by a processor, the information sending method according to any one of claims 1-18 is realized, or The information receiving method of any one of claims 19-23.