WO2020143766A1

WO2020143766A1 - Data transmission method, base station, and terminal

Info

Publication number: WO2020143766A1
Application number: PCT/CN2020/071418
Authority: WO
Inventors: 王飞; 李岩; 金婧; 王菡凝; 王启星; 刘光毅; 丁海煜; 黄宇红
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2019-01-11
Filing date: 2020-01-10
Publication date: 2020-07-16
Also published as: CN111435874A

Abstract

The present invention provides a data transmission method, a base station, and a terminal. The method comprises: sending configuration information of a first Physical Uplink Control Channel (PUCCH) resource set of a terminal to a second base station.

Description

Data transmission method, base station and terminal

Cross-reference of related applications

This application claims the priority of Chinese Patent Application No. 201910026917.1 filed in China on January 11, 2019, the entire contents of which are hereby incorporated by reference.

Technical field

The present disclosure relates to the field of wireless technology, and particularly refers to a data transmission method, base station, and terminal.

Background technique

In the related art, according to the physical downlink control channel (Physical Downlink Control Channel, PDCCH) transmission method, the downlink multi-transmission reception point (Multi-Transmission Reception Point, Multi-TRP) can be coherently combined (non-coherent joint transmission (NCJT)) There are two types of transmission: one is Multi-TRP NCJT transmission based on a single Single PDCCH. In this transmission method, the user equipment (User Equipment, UE) can also be called a terminal, at a transmission time interval (Transmission Time Interval, Only one PDCCH can be received within TTI; one is Multi-TRP-based NCJT transmission based on Multiple PDCCH. In this transmission mode, the UE can receive multiple PDCCHs in one TTI, which are from different TRPs.

For the Multi-TRP-NCJT transmission method based on Multiple PDCCH, the PDCCH itself does not need to do much enhanced design, but only requires the UE to have the ability to monitor multiple PDCCHs in a TTI, and then receive multiple independently scheduled physical downlink shared channels (Physical Downlink Shared Channel, PDSCH). However, how the UE performs hybrid automatic repeat request (HARQ) feedback and transmission on multiple independent PDSCHs requires some enhanced design. In general, there are 2 design ideas:

One is HARQ-acknowledgement ACK feedback based on Single Physical Uplink Control Channel (Physical Uplink Control CHannel, PUCCH), that is, the UE responds to multiple PDSCHs scheduled by multiple PDCCHs received in a time slot, and their corresponding HARQ-ACK information is fed back in the same PUCCH;

One is the HARQ-ACK feedback based on Multiple PUCCH, that is, the UE feeds back the corresponding HARQ-ACK information in different PUCCHs for multiple PDSCHs scheduled by multiple PDCCHs received in one time slot.

The feedback timing from PDSCH to the corresponding HARQ-ACK in the R15 protocol in the related art is jointly indicated by the high-level signaling configuration (dl-DataToUL-ACK) and the dynamic signaling configuration (PDSCH-to-HARQ_feedback timing) indicator, that is, by High-level signaling configures a timing set, and downlink control information (Downlink Control Information, DCI) dynamically selects a timing relationship for indication in this set, and at the same time indicates the use of HARQ-ACK by the PUCCH resource indicator (PUCCH resource indicator) in DCI PUCCH resources.

Based on the above method, it is not difficult to find that there may be situations where HARQ-ACKs of multiple PDSCHs of the same serving cell need to be transmitted in the same time slot. The new air interface (New Radio, NR) in the related technology has There are two ways to determine the HARQ-ACK coding index codebook: semi-static indication and dynamic indication. Both methods will multiplex HARQ-ACK of multiple PDSCHs in one PUCCH for transmission.

Further, for the above HARQ-ACK information feedback method based on Multiple PUCCH, if different TRPs independently determine the PUCCH resource in the DCI corresponding to the respective PDSCH, there may be HARQ-ACK correspondences corresponding to multiple PDSCHs from different TRPs The PUCCH is sent in the same uplink time slot, and there may be overlapping time and frequency domain resources sent by the multiple PUCCHs. Therefore, the UE returns the HARQ-ACK corresponding to different TRPs in the same slot. PUCCH resources may overlap.

Summary of the invention

The purpose of the technical solution of the present disclosure is to provide a data transmission method, a base station and a terminal, to avoid overlapping of PUCCH resources corresponding to HARQ-ACKs of different TRPs fed back by the UE in the same slot.

An embodiment of the present disclosure provides a data transmission method, which is applied to a first base station, where the method includes:

Send configuration information of a terminal's first physical uplink control channel PUCCH resource set to a second base station.

Optionally, the data transmission method, wherein the method further includes:

Sending configuration information of the first resource subset and/or configuration information of the second resource subset to the second base station;

Wherein, the PUCCH resource included in the first resource subset and the PUCCH resource included in the second resource subset both belong to the first PUCCH resource set, and the first resource subset and the second The intersection between resource subsets is empty.

Optionally, the data transmission method, wherein the method further includes:

Acquiring resource confirmation information sent by the second base station;

According to the resource confirmation information, it is determined to interact with the second base station to determine that the first resource subset is used for PUCCH information transmission between the first base station and the terminal, and the second resource subset is used for PUCCH information transmission between the second base station and the terminal.

Optionally, the data transmission method, wherein the method further includes:

Sending configuration information of the second PUCCH resource set to the terminal;

Wherein, the second PUCCH resource set is the same as the first PUCCH resource set, or the second PUCCH resource set is the same as the first resource subset.

Optionally, the data transmission method, wherein the method further comprises: sending downlink control information DCI to the terminal;

The PUCCH resource indication information in the DCI indicates the PUCCH resource in the second PUCCH resource set.

Optionally, in the data transmission method, the configuration information of the first PUCCH resource set of the terminal is sent to the second base station through the Xn interface.

The present disclosure also provides a data transmission method according to another embodiment, which is applied to a first base station, where the method includes:

Sending configuration information of a terminal's first physical uplink control channel PUCCH resource set to a second base station;

Sending downlink control information DCI to the terminal;

The PUCCH resource indication information in the DCI indicates a PUCCH resource in the first resource subset; wherein the PUCCH resource included in the first resource subset belongs to the first PUCCH resource set.

An embodiment of the present disclosure also provides a data transmission method according to another implementation manner, which is applied to a terminal, where the method includes:

Acquiring first downlink control information DCI sent by a first base station, wherein the physical uplink control channel PUCCH resource indication information in the first DCI indicates PUCCH resources in a first resource subset, and the first resource subset belongs to A part of resources in the PUCCH resource set of the first physical uplink control channel pre-configured for the terminal.

Optionally, the data transmission method, wherein the method further includes:

Acquiring configuration information of the second PUCCH resource set sent by the first base station;

Optionally, the data transmission method, wherein the method further includes:

Using the PUCCH resources in the first resource subset indicated by the PUCCH resource indication information to perform a HARQ-ACK feedback to the first base station for a hybrid automatic retransmission request for a physical downlink shared channel PDSCH corresponding to the first DCI .

Optionally, the data transmission method, wherein the method further includes:

Acquiring a second DCI sent by a second base station, wherein the PUCCH resource indication information in the second DCI indicates PUCCH resources in a second resource subset, and the second resource subset belongs to a part of resources in the first PUCCH resource set , And the intersection between the first resource subset and the second resource subset is empty.

Optionally, the data transmission method, wherein the method further includes:

When it is determined according to the first DCI and the second DCI that HARQ-ACK feedback of the PDSCH corresponding to the first DCI and HARQ-ACK of the PDSCH corresponding to the second DCI need to be performed in the same time slot Feedback, but when the current power of the terminal meets the preset restricted condition, determine the target base station that preferentially performs HARQ-ACK feedback among the first base station and the second base station;

HARQ-ACK feedback is performed to the target base station.

Optionally, in the data transmission method, after the HARQ-ACK feedback to the target base station, the method further includes:

If the current power of the terminal satisfies the HARQ-ACK feedback to another base station outside the target base station in the first base station and the second base station, the HARQ-ACK feedback of the other base station is performed.

Optionally, in the data transmission method, at least one of the following rules is used to determine a target base station in the first base station and the second base station that preferentially performs HARQ-ACK feedback:

Selecting the base station serving as the terminal's serving cell among the first base station and the second base station as the target base station;

Among the first base station and the second base station, a base station capable of independently performing HARQ-ACK feedback for the current power of the terminal is selected as the target base station.

An embodiment of the present disclosure also provides a base station. The base station is a first base station and includes a processor and a transceiver. The transceiver is used for:

Optionally, the base station, wherein the transceiver is further used to:

Optionally, the base station, wherein the processor is used to:

Acquiring resource confirmation information sent by the second base station;

Optionally, the base station, wherein the transceiver is further used to:

Sending downlink control information DCI to the terminal;

Optionally, the base station, wherein the transceiver sends configuration information of the first PUCCH resource set of the terminal to the second base station through an Xn interface.

Sending downlink control information DCI to the terminal;

An embodiment of the present disclosure also provides a terminal, including a processor and a transceiver, wherein the transceiver is used for:

Optionally, in the terminal, the transceiver is further used to:

Optionally, in the terminal, the processor is used to:

HARQ-ACK feedback is performed to the target base station.

Optionally, in the terminal, after the HARQ-ACK feedback to the target base station, the processor is further configured to:

Optionally, the terminal, wherein the processor uses at least one of the following rules to determine a target base station in the first base station and the second base station that preferentially performs HARQ-ACK feedback:

An embodiment of the present disclosure also provides a base station, including a memory, a processor, and a computer program stored on the memory and executable on the processor; wherein, when the processor executes the program, any of the above is implemented Item data transmission method.

An embodiment of the present disclosure also provides a terminal, including a memory, a processor, and a computer program stored on the memory and executable on the processor; wherein, when the processor executes the program, any of the above is implemented Item data transmission method.

An embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored, wherein when the program is executed by a processor, the steps in the data scheduling method described in any one of the above are implemented.

At least one of the above technical solutions of the present disclosure has the following beneficial effects:

In the data transmission method described in the embodiments of the present disclosure, PUCCH resource interaction is performed between at least two base stations connected to the terminal, so that the base station separately determines the PUCCH resource corresponding to the terminal for PUCCH information transmission with different base stations, and avoids that the terminal is in the same When the time slots correspond to HARQ-ACK feedback from different base stations, the PUCCH resources used overlap.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present disclosure, the drawings required in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present disclosure. Those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a wireless communication system used in the data transmission method according to an embodiment of the present disclosure;

2 is a schematic flowchart of a data transmission method according to a first implementation manner of an embodiment of the present disclosure;

3 is a schematic flowchart of a data transmission method according to a second implementation manner of an embodiment of the present disclosure;

4 is a schematic flowchart of a data transmission method according to a third implementation manner of an embodiment of the present disclosure;

5 is a schematic structural diagram of a base station according to a first implementation manner of an embodiment of the present disclosure;

6 is a schematic structural diagram of a base station according to a second implementation manner of an embodiment of the present disclosure;

7 is a schematic structural diagram of a terminal according to a first implementation manner of an embodiment of the present disclosure;

8 is a schematic structural diagram of a base station according to a third implementation manner of an embodiment of the present disclosure;

9 is a schematic structural diagram of a base station according to a fourth implementation manner of an embodiment of the present disclosure;

10 is a schematic structural diagram of a terminal according to a second implementation manner of an embodiment of the present disclosure.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present disclosure more clear, the following will describe in detail with reference to the accompanying drawings and specific embodiments.

The data transmission method described in the embodiments of the present disclosure is applied to a wireless communication system. The wireless communication system may be a 5G system, or an evolved long-term evolution (Evolved Long Term Evolution, eLTE) system, or a subsequent evolution communication system. Referring to FIG. 1, it is a schematic structural diagram of a wireless communication system according to an embodiment of the present disclosure. In the embodiment of the present disclosure, the wireless communication system may be formed as a Massive MIMO (Multiple-Input Multiple-Output) system, and supports multi-TRP non-coherent joint transmission. Specifically, a cell is jointly covered by multiple TRPs 10, and the terminal 20 is connected to each TRP 10. In practical applications, the connection between the above devices may be a wireless connection.

Each TRP 10 provided in the embodiment of the present disclosure may be a base station, which may be a commonly used base station, an evolved base station (evolved node, base station, eNB), or a network side device in a 5G system (for example Next-generation base station (next generation node, base station, gNB) or cell cell and other equipment.

The terminal 20 provided by the embodiment of the present disclosure may be a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (Ultra-Mobile Personal Computer, UMPC), a netbook, or a personal digital assistant (Personal Digital Assistant, PDA), etc.

It should be noted here that the base stations mentioned in the data transmission method described in the embodiments of the present disclosure have no special explanation, and each base station is formed as a TRP connected to the terminal.

In order to solve the HARQ-ACK information feedback method based on Multiple PUCCH, the PUCCH resources corresponding to HARQ-ACK of different TRPs fed back by the UE in the same slot may overlap. The data transmission method described in the embodiment of the present disclosure may The base stations connected to the terminal perform PUCCH resource interaction, so that the base station determines the PUCCH resources corresponding to the terminal for PUCCH information transmission with different base stations, so as to avoid overlapping of the used PUCCH resources.

Specifically, as shown in FIG. 2, one of the implementation manners of the data transmission method described in the embodiments of the present disclosure, which is applied to the first base station, includes:

S210: Send configuration information of a first physical uplink control channel PUCCH resource set of a terminal to a second base station.

Specifically, in step S210, the first base station sends a first PUCCH resource set configured for the terminal to the second base station, the first PUCCH resource set may be the first base station or a network-side device different from the first base station is used by the terminal Configuration, the network-side device may be one of the base stations connected to the terminal, such as the terminal's primary serving cell. For example, in the related art, the network-side device in NR will configure up to 4 PUCCH resource sets for the terminal. Each resource set includes {PUCCH resource set address pucch-ResourceSetId, resource list resourceList, and the maximum load minus 1 maxPayloadMinus1} , Where the first resource set contains a maximum of 32 PUCCH Resources, and the other resource set contains a maximum of 8 PUCCH Resources.

By sending the configuration information of the first PUCCH resource set configured for the terminal to the second base station, the second base station can understand the PUCCH resource configured for the terminal by the first base station, so that the first base station and the second base station respectively determine that the corresponding terminal is used for PUCCH resources for PUCCH information transmission to avoid overlapping of PUCCH resources used by the terminal.

Optionally, the configuration information of the first PUCCH resource set may include the address of the PUCCH resource set and the configuration of the PUCCH resource included in each PUCCH resource set.

In the embodiment of the present disclosure, optionally, the method further includes:

In the embodiment of the present disclosure, the first resource subset is used for PUCCH information transmission between the first base station and the terminal, and the second resource subset is used for the second base station and the terminal PUCCH information transmission between.

Through resource interaction between the first base station and the second base station, it is determined that the first resource subset in the first PUCCH resource set is used for transmission of PUCCH information between the first base station and the terminal, and the second resource sub in the PUCCH resource The set is used for PUCCH information transmission between the second base station and the terminal, and there is no intersection between the first resource subset and the second resource subset, so that when the first base station and the second base station send DCI to the terminal respectively, the DCI The PUCCH resource indication information can indicate the PUCCH resources in the first resource subset and the second resource subset, respectively, to ensure that the terminal uses PUCCH resources, and avoids the use of PUCCH when HARQ-ACK feedback is performed by different base stations in the same slot. Resources overlap.

Further, in the data transmission method according to the embodiment of the present disclosure, after sending the configuration information of the first resource subset and/or the configuration information of the second resource subset to the second base station, the method further includes:

Acquiring resource confirmation information sent by the second base station;

The process of the first base station sending the configuration information of the first resource subset and/or the configuration information of the second resource subset to the second base station, and the process of the second base station sending the resource confirmation information to the first base station may be: The process of interactively confirming the first resource subset and the second resource subset between the second base stations.

Optionally, the first base station may simultaneously send the configuration information of the first resource subset and the configuration information of the second resource subset to the second base station, and the second base station sends the first base station to determine the first resource subset and Resource confirmation information of a second resource subset, determining that the first resource subset is used for PUCCH information transmission between the first base station and the terminal, and the second resource subset is used for the second base station PUCCH information transmission with the terminal.

Based on this method, the first base station determines the first subset of resources that can be used for the transmission of PUCCH information between the terminal and the first base station according to the PUCCH resource set configured for the terminal by the network side device, and can be used for the terminal and the second The second resource subset of PUCCH information transmission between the base stations sends resource interaction information to the second base station, and after obtaining the resource confirmation information sent by the second base station, that is, after confirming that the above resource allocation can be received, the first resource is determined The subset is used for PUCCH information transmission between the first base station and the terminal, and the second resource subset is used for PUCCH information transmission between the second base station and the terminal.

Optionally, the first base station may send only the configuration information of the first resource subset to the second base station. In this manner, the first base station obtains the resource confirmation information sent by the second base station, where the resource confirmation information includes the second resource sub Configuration information. According to the resource confirmation information sent by the second base station, it is determined that the first resource subset is used for PUCCH information transmission between the first base station and the terminal, and the second resource subset is used for the second base station PUCCH information transmission with the terminal.

Based on the above manner, the first base station may determine the first resource subset for PUCCH information transmission between the first base station and the terminal, and the second base station may determine the PUCCH information transmission between the second base station and the terminal The second resource subset is determined after negotiation and confirmation by both parties, and the first resource subset is determined to be used for PUCCH information transmission between the first base station and the terminal, and the second resource subset is used for PUCCH information transmission between the second base station and the terminal .

Optionally, the first base station may also send only the configuration information of the second resource subset to the second base station. In this manner, the first base station sends the second base station a PUCCH resource that recommends the transmission of PUCCH information between the second base station and the terminal Further, the first base station obtains the resource confirmation information sent by the second base station, the resource confirmation information may include a confirmation message for the second resource subset, and may also include configuration information of the first resource subset for suggestion PUCCH resources for PUCCH information transmission between the first base station and the terminal. In this way, it can be determined that the first resource subset is used for PUCCH information transmission between the first base station and the terminal according to resource confirmation information sent by the second base station, and the second resource subset is used PUCCH information transmission between the second base station and the terminal.

Based on the above method, the first base station may determine the second resource subset for PUCCH information transmission between the second base station and the terminal, and the second base station may determine the PUCCH information transmission between the first base station and the terminal The first resource subset is determined by negotiation between the two parties, and the first resource subset is determined to be used for PUCCH information transmission between the first base station and the terminal, and the second resource subset is used for PUCCH information transmission between the second base station and the terminal .

It can be understood that the process of performing resource interaction between the first base station and the second base station described above to determine the first resource subset and the second resource subset is only for illustration, and is not specifically limited thereto.

Optionally, the data transmission method described in the embodiments of the present disclosure further includes:

In the data transmission method described in the embodiment of the present disclosure, the configuration information of the second PUCCH resource set is sent to the terminal, and the second PUCCH resource set is used to configure the first PUCCH resource set or the first resource subset for the terminal. PUCCH information transmission between a base station and a terminal.

Optionally, using the data transmission method described in the embodiment of the present disclosure, further comprising: sending downlink control information DCI to the terminal;

Specifically, since the second PUCCH resource set is the same as the first PUCCH resource set or the same as the first resource subset, the PUCCH resource indication information in the DCI sent to the terminal may indicate the PUCCH resource in the first PUCCH resource set Or indicate the PUCCH resource in the first resource subset.

It should be noted that in the data transmission method described in the embodiment of the present disclosure, the above takes the TRP connected to the terminal as an example to include a first base station and a second base station respectively, and performs resource interaction between the first base station and the second base station to determine the respective The PUCCH resource applied to the transmission of PUCCH information with the terminal is described as an example. It can be understood that when the number of TRPs is more than two, one of the TRPs can be used for resources with each TRP connected to the terminal. Interact to determine the PUCCH resource corresponding to the transmission of PUCCH information between each TRP and the terminal, so that the intersection between the determined subset of PUCCH resources corresponding to each TRP is empty, that is, there is no intersection with each other.

Optionally, in the embodiment of the present disclosure, in step S210, when the configuration information of the first PUCCH resource set of the terminal is sent to the second base station, the Xn interface may be used.

Of course, the first base station and the second base station are not limited to only being able to perform resource interaction through the Xn interface. In the data transmission method described in the embodiment of the present disclosure, the manner in which the first resource subset and the second resource subset are determined between the first base station and the second base station may be exemplified as follows:

Example one

Multi-TRP joint downlink transmission is performed between the first base station and the second base station and the UE, the first base station is the serving cell of the UE, and the network-side device sends PUCCH configuration information for the UE, which is determined as the terminal configuration PUCCH resources (first PUCCH resource set), the configured PUCCH resources include:

4 PUCCH Resource {PUCCH Resource Set 0, PUCCH Resource Set 1, PUCCH Resource Set 2, PUCCH Resource Set 3};

Among them, PUCCH Resource Set 0 includes 32 PUCCH Resources {PUCCH Resource 0-0～PUCCH Resource 0-31};

PUCCH Resource Set 1 includes 8 PUCCH Resources {PUCCH Resource 1-0～PUCCH Resource 1-7};

PUCCH Resource Set 2 includes 8 PUCCH Resources {PUCCH Resource 2-0～PUCCH Resource 2-7};

PUCCH Resource 3 includes 8 PUCCH Resources {PUCCH Resource 3-0～PUCCH Resource 3-7};

The first base station and the second base station exchange the resource configuration information of the PUCCH resource through Xn, and determine the following interaction information:

The above-mentioned first resource subset of PUCCH resources is used for PUCCH information transmission between the first base station and the UE, and the first resource subset includes:

16 PUCCH Resources included in PUCCH Resource Set 0 {PUCCH Resource 0-0～PUCCH Resource 0-15};

4 PUCCH Resources included in PUCCH Resource Set 1 {PUCCH Resource 1-0～PUCCH Resource 1-3};

4 PUCCH Resources included in PUCCH Resource Set 2 {PUCCH Resource 2-0～PUCCH Resource 2-3};

4 PUCCH Resources included in PUCCH Resource Set 3 {PUCCH Resource 3-0～PUCCH Resource 3-3};

The above second resource subset of PUCCH resources is used for PUCCH information transmission between the second base station and the UE, and the second resource subset includes:

16 PUCCH Resources {PUCCH Resource 0-16～PUCCH Resource 0-31} included in PUCCH Resource Set 0;

4 PUCCH Resources included in PUCCH Resource Set 1 {PUCCH Resource 1-4～PUCCH Resource 1-7};

4 PUCCH Resources included in PUCCH Resource Set 2 {PUCCH Resource 2-4～PUCCH Resource 2-7};

The 4 PUCCH Resources {PUCCH Resource 3-4 ~ PUCCH Resource 3-7} included in PUCCH Resource Set 3.

Example 2

Multi-TRP joint downlink transmission is performed between the first base station and the second base station and the UE, the first base station is the serving cell of the UE, and the network-side device sends PUCCH configuration information for the UE, that is, the PUCCH determined to be configured for the terminal Resources (first PUCCH resource set), the configured PUCCH resources include:

8 PUCCH Resources {PUCCH Resource Set 0, PUCCH Resource Set 1, PUCCH Resource Set 2, PUCCH Resource Set 3, PUCCH Resource Set 4, PUCCH Resource Set 5, PUCCH Resource Set 6, PUCCH Resource Set 7

PUCCH Resource Set 4 includes 32 PUCCH Resources {PUCCH Resource 4-0～PUCCH Resource 4-31};

PUCCH Resource 5 includes 8 PUCCH Resources {PUCCH Resource 5-0～PUCCH Resource 5-7};

PUCCH Resource 6 includes 8 PUCCH Resources {PUCCH Resource 6-0 ~ PUCCH Resource 6-7};

PUCCH Resource Set 7 includes 8 PUCCH Resources {PUCCH Resource 7-0～PUCCH Resource 7-7};

PUCCH Resource Set 0, PUCCH Resource Set 1, PUCCH Resource Set 2, PUCCH Resource Set 3;

The above second resource subset of PUCCH resources is used for transmission of PUCCH information between the second base station and the UE, and the second resource subset includes:

PUCCHResource4, PUCCHResource5, PUCCHResource6, PUCCHResource7.

It can be understood that, the PUCCH resources determined by the first resource subset and the second resource subset are only examples, and are not limited thereto.

In addition, it should be noted that, in the data transmission method described in the embodiment of the present disclosure, the first base station mentioned may be any base station among multiple base stations that can perform Multi-TRP joint downlink transmission with the UE.

In the embodiment of the present disclosure, downlink control information DCI is sent to the terminal. Optionally, the PUCCH resource indication information in the DCI indicates the PUCCH resource in the first resource subset.

Specifically, the PUCCH resource indication information in the DCI sent to the terminal may indicate one of the PUCCH resources included in the first resource subset to enable the terminal to use the PUCCH resource indicated by the DCI to perform the The DCI scheduled physical downlink shared channel PDSCH hybrid automatic retransmission request acknowledges the HARQ-ACK feedback.

With the data transmission method described in the embodiments of the present disclosure, when the first base station and the second base station send DCI to the terminal, the PUCCH resources indicated by the PUCCH resource indication information in the DCI will not overlap, ensuring that the terminal is using PUCCH resources, When the same slot corresponds to different base stations for HARQ-ACK feedback, avoid overlapping of PUCCH resources used.

Another embodiment of the data transmission method described in the embodiment of the present disclosure is applied to the first base station. As shown in FIG. 3, the method includes:

S310: Send configuration information of a terminal's first physical uplink control channel PUCCH resource set to a second base station;

S320: Send downlink control information DCI to the terminal;

Using the above process, by making PUCCH resource interactions between the base stations connected to the terminal, different base stations can determine PUCCH resources separately; further, by making the PUCCH resource indication information in the DCI sent to the terminal indicate the PUCCH resources to avoid overlapping of the PUCCH resources used when the terminal performs HARQ-ACK feedback to the first base station and HARQ-ACK feedback to other base stations.

Optionally, after step S310, the method further includes:

Optionally, the method further includes:

Acquiring resource confirmation information sent by the second base station;

Optionally, the method further includes:

The embodiment of the present disclosure also provides a data transmission method according to another embodiment, which is applied to a terminal. As shown in FIG. 4, the method includes:

S410. Acquire first downlink control information DCI sent by a first base station, where physical uplink control channel PUCCH resource indication information in the first DCI indicates PUCCH resources in a first resource subset, and the first resource sub The set belongs to a part of resources in the first physical uplink control channel PUCCH resource set pre-configured for the terminal.

Optionally, the method further includes:

Using the PUCCH resources in the first resource subset indicated by the PUCCH resource indication information to perform a HARQ-ACK feedback on the first base station to perform a hybrid automatic retransmission request for the physical downlink shared channel PDSCH scheduled by the first DCI .

Based on the data transmission method described in the embodiment of the present disclosure, in one embodiment, after acquiring the first DCI sent by the first base station, the terminal performs the first DCI according to the PUCCH resource indicated by the PUCCH resource indication information in the first DCI The scheduled PDSCH hybrid automatic retransmission request acknowledges the HARQ-ACK feedback.

Optionally, in another implementation manner of the data transmission method according to an embodiment of the present disclosure, the method further includes:

In the data transmission method described in the embodiments of the present disclosure, for multiple base stations that can perform Multi-TRP joint downlink transmission with a UE, corresponding PUCCH resources indicated in DCI for PUCCH information transmission are not in the frequency domain. There is an intersection, so it can be ensured that the terminal is using PUCCH resources, and when the same slot corresponds to different base stations for HARQ-ACK feedback, the PUCCH resources used are avoided from overlapping.

Optionally, in the embodiment of the present disclosure, the method further includes:

HARQ-ACK feedback is performed to the target base station.

Optionally, using the data transmission method described in the embodiment of the present disclosure, after the HARQ-ACK feedback to the target base station, the method further includes:

Specifically, at least one of the following rules is used to determine a target base station that preferentially performs HARQ-ACK feedback among the first base station and the second base station:

Using the data transmission method described in the embodiments of the present disclosure, the resource interaction between the first base station and the second base station is utilized, so that the PUCCH resources used by the terminal for HARQ-ACK feedback to different TRPs in Multi-TRP transmission are collected in the frequency domain There is no overlap in resources. In this way, even when data transmission is actually performed, the PUCCHs corresponding to HARQ-ACKs corresponding to multiple PDSCHs from different TRPs need to be sent in the same uplink time slot, resulting in the entire or partial overlap of the transmissions of the multiple PUCCHs in the time domain. However, no overlap occurs in the frequency domain.

Further, when the current power of the terminal is sufficient, HARQ-ACK feedback corresponding to different TRPs can be sent on the same uplink time slot, without sending any PUCCH information; when the current power of the terminal is limited, the corresponding different When the HARQ-ACK feedback of the TRP is sent on the same uplink time slot, the data transmission method described in the embodiment of the present disclosure is used, and the priority of PUCCH information transmission of different TRPs needs to be further considered to determine the target base station that preferentially performs the HARQ-ACK feedback.

Specifically, one of the rules for determining the target base station that preferentially performs HARQ-ACK feedback among the first base station and the second base station may be selecting the first base station and the second base station as the terminal The base station of the serving cell is the target base station, that is, the target base station may be determined by the serving cell in the first base station and the second base station:

For example, if the first base station is the serving cell of the UE, the priority of the PUCCH information transmission of the first base station is higher than the priority of the PUCCH information transmission of the second base station;

Based on this rule, the HARQ-ACK feedback of the first base station can be performed first. Optionally, after performing HARQ-ACK feedback of the first base station, the current remaining power of the terminal may be used for HARQ-ACK feedback of the second base station.

If the second base station is the serving cell of the UE, the priority of the PUCCH information transmission of the second base station is higher than the priority of the PUCCH information transmission of the first base station;

Based on this rule, the HARQ-ACK feedback of the second base station can be performed first. Optionally, after performing HARQ-ACK feedback of the second base station, the current remaining power of the terminal may be used for HARQ-ACK feedback of the first base station.

In another embodiment, another rule for determining the target base station that preferentially performs HARQ-ACK feedback among the first base station and the second base station may be selecting the first base station and the second base station. The base station capable of independently performing HARQ-ACK feedback on the current power of the terminal is the target base station, that is, the target base station may be determined according to the PUCCH information of which base station the terminal's current power can meet to be transmitted separately.

For example, if the current power of the terminal can satisfy the transmission of the PUCCH information of the first base station alone, but the transmission of the PUCCH information of the second base station cannot be satisfied, the priority of the PUCCH information transmission of the first base station is higher than that of the second base station Priority of message transmission.

If the current power of the terminal can satisfy the transmission of the PUCCH information of the second base station alone, but the transmission of the PUCCH information of the first base station cannot be satisfied, the priority of the PUCCH information transmission of the second base station is higher than that of the first base station Priority.

Using the data transmission method described in the embodiments of the present disclosure, based on the resource interaction between the first base station and the second base station, it is determined that the first subset of PUCCH resources is used for the transmission of PUCCH information between the first base station and the terminal. The second resource subset in the PUCCH resource is used for PUCCH information transmission between the second base station and the terminal, and there is no intersection between the first resource subset and the second resource subset, so that the first base station and the second base station are in separate When sending DCI to the terminal, the PUCCH resources indicated by the PUCCH resource indication information in the DCI will not overlap, ensuring that the terminal uses PUCCH resources and avoids the use of PUCCH when HARQ-ACK feedback is performed in the same slot corresponding to different base stations Resources overlap. Further, when the current power of the terminal is limited and HARQ-ACK feedback corresponding to multiple TRPs is not sent on the same uplink time slot, the priority base station for HARQ-ACK feedback is determined by considering the priority of PUCCH information transmission of different TRPs To ensure that the PUCCH information of TRP with higher priority is given priority.

In another aspect, an embodiment of the present disclosure further provides a base station. The base station is a first base station. As shown in FIG. 5, the base station 500 includes a processor 510 and a transceiver 520, where the transceiver 520 is used to:

Optionally, the transceiver 520 is also used to:

Optionally, in the base station, the processor 510 is configured to:

Acquiring resource confirmation information sent by the second base station;

Optionally, the transceiver 520 is also used to:

Sending downlink control information DCI to the terminal;

Optionally, the transceiver 520 sends the configuration information of the first PUCCH resource set of the terminal to the second base station through the Xn interface.

Another embodiment of the present disclosure provides another base station. The base station is a first base station. As shown in FIG. 6, the base station 600 includes a processor 610 and a transceiver 620. The transceiver 520 is configured to:

Sending downlink control information DCI to the terminal;

An embodiment of the present disclosure also provides a terminal. As shown in FIG. 7, the terminal 700 includes a processor 710 and a transceiver 720, where the transceiver 720 is used to:

Optionally, the transceiver 720 is also used to:

Optionally, the processor 710 is used to:

HARQ-ACK feedback is performed to the target base station.

Optionally, after the HARQ-ACK feedback to the target base station, the processor 710 is further used to:

Optionally, the processor 710 uses at least one of the following rules to determine the target base station that preferentially performs HARQ-ACK feedback among the first base station and the second base station:

An embodiment of the present disclosure also provides a base station, which is a first base station. As shown in FIG. 8, the base station includes a memory 810, a processor 820, and is stored on the memory 810 and can run on the processor 820 Computer program. As shown in FIG. 8, the base station further includes a transceiver 830 and a bus interface 840.

Among them, the processor 820 is used to read the program in the memory 810;

The transceiver 830 is used to receive and send data under the control of the processor.

In addition, the bus interface 840 may include any number of interconnected buses and bridges, specifically, one or more processors represented by the processor 820 and various circuits of the memory represented by the memory are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article. The bus interface provides an interface. The transceiver 830 may be a plurality of elements, including a transmitter and a transceiver, and provides a unit for communicating with various other devices on a transmission medium. The processor 820 is responsible for managing the bus architecture and general processing, and the memory may store data used by the processor when performing operations.

Specifically, the processor 820 is used to:

Optionally, the processor 820 is also used to:

Wherein, the PUCCH resources included in the first resource subset and the PUCCH resources included in the second resource subset both belong to the first PUCCH resource set, and the first resource subset and the second The intersection between resource subsets is empty.

Optionally, the processor 820 is also used to:

Acquiring resource confirmation information sent by the second base station;

Optionally, the processor 820 is also used to:

Sending downlink control information DCI to the terminal;

Optionally, the processor 820 sends the configuration information of the first PUCCH resource set of the terminal to the second base station through the Xn interface.

An embodiment of the present disclosure also provides a base station, which is a first base station. As shown in FIG. 9, the base station includes a memory 910, a processor 920, and is stored on the memory 910 and can run on the processor 920 Computer program. As shown in FIG. 9, the base station also includes a transceiver 930 and a bus interface 940.

The processor 920 is used to read the program in the memory 910;

The transceiver 930 is used to receive and send data under the control of the processor.

In addition, the bus interface 940 may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 920 and various circuits of the memory represented by the memory are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article. The bus interface provides an interface. The transceiver 930 may be a plurality of elements, including a transmitter and a transceiver, and provides a unit for communicating with various other devices on a transmission medium. The processor 920 is responsible for managing the bus architecture and general processing, and the memory may store data used by the processor when performing operations.

Specifically, the processor 920 is used to:

Sending downlink control information DCI to the terminal;

An embodiment of the present disclosure also provides a terminal. As shown in FIG. 10, the terminal includes a memory 1020, a processor 1010, and a computer program stored on the memory 1020 and executable on the processor 1010. In addition, the terminal also Includes transceiver 1030.

The processor 1010 is used to read the program in the memory 1020, and specifically performs the following process:

Optionally, the processor 1010 is also used to:

Optionally, the processor 1010 is further configured to: use the PUCCH resources in the first resource subset indicated by the PUCCH resource indication information to perform a physical downlink shared channel corresponding to the first DCI to the first base station PDSCH hybrid automatic retransmission request acknowledges HARQ-ACK feedback.

Optionally, the processor 1010 is also used to:

HARQ-ACK feedback is performed to the target base station.

Optionally, after the HARQ-ACK feedback to the target base station, the processor 1010 is further configured to:

Optionally, the processor 1010 uses at least one of the following rules to determine the target base station that preferentially performs HARQ-ACK feedback among the first base station and the second base station:

In addition, the terminal further includes a user interface 1040, which is connected to a bus interface that provides the interface. In FIG. 7, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 1010 and various circuits of the memory represented by the memory 1020 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article. The transceiver 1030 may be a plurality of elements, including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor when performing operations.

The processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor when performing operations.

In addition, specific embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored, where the program, when executed by a processor, implements the steps in the data transmission method described in any one of the above.

In the several embodiments provided in this application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.

In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above integrated unit implemented in the form of a software functional unit may be stored in a computer-readable storage medium. The above software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the transceiving methods described in the embodiments of the present disclosure. The foregoing storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

It can be understood that the embodiments described in the embodiments of the present disclosure may be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processor (Digital Signal Processing, DSP), digital signal processing device (DSP Device, DSPD), programmable Logic Device (Programmable Logic Device, PLD), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processor, controller, microcontroller, microprocessor, others for performing the functions described in this disclosure Electronic unit or its combination.

For software implementation, the technology described in the embodiments of the present disclosure may be implemented through modules (eg, procedures, functions, etc.) that perform the functions described in the embodiments of the present disclosure. The software codes can be stored in the memory and executed by the processor. The memory may be implemented in the processor or external to the processor.

The above is an optional embodiment of the present disclosure. It should be noted that those of ordinary skill in the art can make several improvements and retouching without departing from the principles described in the present disclosure. These improvements and retouching also It should be regarded as the scope of protection of this disclosure.

Claims

A data transmission method, applied to the first base station, includes:

Send configuration information of a terminal's first physical uplink control channel PUCCH resource set to a second base station.
The data transmission method according to claim 1, further comprising:

Sending configuration information of the first resource subset and/or configuration information of the second resource subset to the second base station;

Wherein, the PUCCH resource included in the first resource subset and the PUCCH resource included in the second resource subset both belong to the first PUCCH resource set, and the first resource subset and the second The intersection between resource subsets is empty.
The data transmission method according to claim 2, further comprising:

Acquiring resource confirmation information sent by the second base station;

According to the resource confirmation information, it is determined to interact with the second base station to determine that the first resource subset is used for PUCCH information transmission between the first base station and the terminal, and the second resource subset is used for PUCCH information transmission between the second base station and the terminal.
The data transmission method according to claim 2, further comprising:

Sending configuration information of the second PUCCH resource set to the terminal;

Wherein, the second PUCCH resource set is the same as the first PUCCH resource set, or the second PUCCH resource set is the same as the first resource subset.
The data transmission method according to claim 4, further comprising: sending downlink control information DCI to the terminal;

The PUCCH resource indication information in the DCI indicates the PUCCH resource in the second PUCCH resource set.
The data transmission method according to claim 1, wherein the configuration information of the first PUCCH resource set of the terminal is sent to the second base station through the Xn interface.
A data transmission method, applied to the first base station, includes:

Sending configuration information of a terminal's first physical uplink control channel PUCCH resource set to a second base station;

Sending downlink control information DCI to the terminal;

The PUCCH resource indication information in the DCI indicates a PUCCH resource in the first resource subset; wherein the PUCCH resource included in the first resource subset belongs to the first PUCCH resource set.
A data transmission method applied to a terminal, including:

Acquiring first downlink control information DCI sent by a first base station, wherein the physical uplink control channel PUCCH resource indication information in the first DCI indicates PUCCH resources in a first resource subset, and the first resource subset belongs to A part of resources in the PUCCH resource set of the first physical uplink control channel pre-configured for the terminal.
The data transmission method according to claim 8, further comprising:

Acquiring configuration information of the second PUCCH resource set sent by the first base station;

Wherein, the second PUCCH resource set is the same as the first PUCCH resource set, or the second PUCCH resource set is the same as the first resource subset.
The data transmission method according to claim 8, further comprising:

Using the PUCCH resources in the first resource subset indicated by the PUCCH resource indication information to perform a HARQ-ACK feedback to the first base station for a hybrid automatic retransmission request for a physical downlink shared channel PDSCH corresponding to the first DCI .
The data transmission method according to claim 8, further comprising:

Acquiring a second DCI sent by a second base station, wherein the PUCCH resource indication information in the second DCI indicates PUCCH resources in a second resource subset, and the second resource subset belongs to a part of resources in the first PUCCH resource set , And the intersection between the first resource subset and the second resource subset is empty.
The data transmission method according to claim 11, further comprising:

When it is determined according to the first DCI and the second DCI that HARQ-ACK feedback of the PDSCH corresponding to the first DCI and HARQ-ACK of the PDSCH corresponding to the second DCI need to be performed in the same time slot Feedback, but when the current power of the terminal meets the preset restricted condition, determine the target base station that preferentially performs HARQ-ACK feedback among the first base station and the second base station;

HARQ-ACK feedback is performed to the target base station.
The data transmission method according to claim 12, wherein after the HARQ-ACK feedback to the target base station, the method further comprises:

If the current power of the terminal satisfies the HARQ-ACK feedback to another base station outside the target base station in the first base station and the second base station, the HARQ-ACK feedback of the other base station is performed.
The data transmission method according to claim 12, wherein at least one of the following rules is used to determine a target base station among the first base station and the second base station that preferentially performs HARQ-ACK feedback:

Selecting the base station serving as the terminal's serving cell among the first base station and the second base station as the target base station;

Among the first base station and the second base station, a base station capable of independently performing HARQ-ACK feedback for the current power of the terminal is selected as the target base station.
A base station. The base station is a first base station and includes a processor and a transceiver. The transceiver is used for:

Send configuration information of a terminal's first physical uplink control channel PUCCH resource set to a second base station.
The base station according to claim 15, wherein the transceiver is further used to:

Sending configuration information of the first resource subset and/or configuration information of the second resource subset to the second base station;

Wherein, the PUCCH resource included in the first resource subset and the PUCCH resource included in the second resource subset both belong to the first PUCCH resource set, and the first resource subset and the second The intersection between resource subsets is empty.
The base station according to claim 16, wherein the processor is used to:

Acquiring resource confirmation information sent by the second base station;

According to the resource confirmation information, it is determined to interact with the second base station to determine that the first resource subset is used for PUCCH information transmission between the first base station and the terminal, and the second resource subset is used for PUCCH information transmission between the second base station and the terminal.
The base station according to claim 16, wherein the transceiver is further used to:

Sending configuration information of the second PUCCH resource set to the terminal;

Wherein, the second PUCCH resource set is the same as the first PUCCH resource set, or the second PUCCH resource set is the same as the first resource subset.
The base station according to claim 18, wherein the transceiver is further used to:

Sending downlink control information DCI to the terminal;

The PUCCH resource indication information in the DCI indicates the PUCCH resource in the second PUCCH resource set.
The base station according to claim 15, wherein the transceiver transmits configuration information of the first PUCCH resource set of the terminal to the second base station through an Xn interface.
A base station. The base station is a first base station and includes a processor and a transceiver. The transceiver is used for:

Sending configuration information of a terminal's first physical uplink control channel PUCCH resource set to a second base station;

Sending downlink control information DCI to the terminal;

The PUCCH resource indication information in the DCI indicates a PUCCH resource in the first resource subset; wherein the PUCCH resource included in the first resource subset belongs to the first PUCCH resource set.
A terminal includes a processor and a transceiver, wherein the transceiver is used for:

Acquiring first downlink control information DCI sent by a first base station, wherein the physical uplink control channel PUCCH resource indication information in the first DCI indicates PUCCH resources in a first resource subset, and the first resource subset belongs to A part of resources in the PUCCH resource set of the first physical uplink control channel pre-configured for the terminal.
The terminal according to claim 22, wherein the transceiver is further used to:

Acquiring configuration information of the second PUCCH resource set sent by the first base station;

Wherein, the second PUCCH resource set is the same as the first PUCCH resource set, or the second PUCCH resource set is the same as the first resource subset.
The terminal according to claim 22, wherein the transceiver is further used to:

Using the PUCCH resources in the first resource subset indicated by the PUCCH resource indication information to perform a HARQ-ACK feedback to the first base station for a hybrid automatic retransmission request for a physical downlink shared channel PDSCH corresponding to the first DCI .
The terminal according to claim 22, wherein the transceiver is further used to:

Acquiring a second DCI sent by a second base station, wherein the PUCCH resource indication information in the second DCI indicates PUCCH resources in a second resource subset, and the second resource subset belongs to a part of resources in the first PUCCH resource set , And the intersection between the first resource subset and the second resource subset is empty.
The terminal of claim 25, wherein the processor is configured to:

When it is determined according to the first DCI and the second DCI that HARQ-ACK feedback of the PDSCH corresponding to the first DCI and HARQ-ACK of the PDSCH corresponding to the second DCI need to be performed in the same time slot Feedback, but when the current power of the terminal meets the preset restricted condition, determine the target base station that preferentially performs HARQ-ACK feedback among the first base station and the second base station;

HARQ-ACK feedback is performed to the target base station.
The terminal according to claim 26, wherein after the HARQ-ACK feedback to the target base station, the processor is further configured to:

If the current power of the terminal satisfies the HARQ-ACK feedback to another base station outside the target base station in the first base station and the second base station, the HARQ-ACK feedback of the other base station is performed.
The terminal according to claim 26, wherein the processor uses at least one of the following rules to determine a target base station among the first base station and the second base station that preferentially performs HARQ-ACK feedback:

Selecting the base station serving as the terminal's serving cell among the first base station and the second base station as the target base station;

Among the first base station and the second base station, a base station capable of independently performing HARQ-ACK feedback for the current power of the terminal is selected as the target base station.
A base station, including a memory, a processor, and a computer program stored on the memory and executable on the processor; wherein, when the processor executes the program, any one of claims 1 to 6 is implemented The data transmission method, or the data transmission method according to claim 7.
A terminal, including a memory, a processor, and a computer program stored on the memory and executable on the processor; wherein, when the processor executes the program, any one of claims 8 to 14 is implemented The data transmission method.
A computer-readable storage medium on which a computer program is stored, wherein when the program is executed by a processor, the steps in the data scheduling method according to any one of claims 1 to 6 are implemented, or the method is implemented as claimed in claim 7 The steps in the data transmission method, or the steps in the data transmission method according to any one of claims 8 to 14.