WO2022032663A1

WO2022032663A1 - Coordinated transmission method, base station, and terminal

Info

Publication number: WO2022032663A1
Application number: PCT/CN2020/109300
Authority: WO
Inventors: 王飞; 钱丰勇
Original assignee: 华为技术有限公司
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2022-02-17

Abstract

The embodiments of the present application disclose a coordinated transmission method, a base station and a terminal. Said method comprises: a first base station determining a first coordinated transmission region between the first base station and a second base station, the first coordinated transmission region being a signal overlap coverage region of the first base station and the second base station; the first base station allocating first common CSI-RS resources for coordinated transmission to the first coordinated transmission region; and when a terminal enters the first coordinated transmission region, allocating the first common CSI-RS resources to the terminal. By means of the embodiments of the present application, the utilization rate of CSI-RS resources and the throughput performance of the cells can be improved.

Description

A method, base station and terminal for cooperative transmission

technical field

The present application is in the field of communication technologies, and in particular, relates to a method, a base station, and a terminal for cooperative transmission.

Background technique

Cooperative transmission (Coordinated Multi-Point Transmission/Reception, CoMP for short) refers to more than one transmission point that is separated geographically, and cooperatively participates in the data transmission of a terminal or the joint reception of data sent by a terminal. It is widely used in the fifth generation mobile communication technology (5th-Generation, 5G for short) network.

In the prior art, the current cooperative transmission usually allocates a Channel State Information Reference Signal (CSI-RS) measurement resource for each user in each cell by the serving cell, and then the terminal uses each The allocated CSI-RS resources are used to measure the channel state, thereby completing the coordinated transmission. When there are a large number of users who need to perform coordinated transmission, there will be a problem of limited resources, and the limited CSI-RS resources need to be coordinated between the serving cell and the cooperating cell, resulting in complicated inter-cell interaction procedures.

SUMMARY OF THE INVENTION

The technical problem to be solved by the embodiments of the present application is to provide a cooperative transmission method, a base station, and a terminal to solve the problems of limited CSI-RS resources and complicated inter-cell interaction procedures during cooperative transmission of the terminal.

In a first aspect, an embodiment of the present application provides a method for cooperative transmission, which may include:

The first base station determines a first cooperative transmission area between the first base station and the second base station, where the first cooperative transmission area is a signal overlapping coverage area of the first base station and the second base station;

assigning, by the first base station, a first common CSI-RS resource for coordinated transmission to the first coordinated transmission area;

When the terminal enters the first coordinated transmission area, the terminal is allocated the first common CSI-RS resource.

The base station determines the cooperative transmission area with other base stations and allocates the corresponding public CSI-RS resources for the cooperative transmission area. When each terminal enters the cooperative transmission area, the base station can allocate the public CSI corresponding to the cooperative transmission area to it. -RS resource, each terminal can use the common CSI-RS resource to measure the channel state, which greatly improves the utilization of CSI-RS resources and the throughput performance of the cell, and provides CSI for scenarios where a large number of terminals exist - RS resource constrained solution.

In a possible implementation, the method further includes:

receiving, by the first base station, a first measurement result reported by the terminal after using the first common CSI-RS resource to measure a channel state;

If the channel state between the first base station and the terminal satisfies the requirement of cooperative transmission, the second base station is notified to perform cooperative transmission.

In a possible implementation, the method further includes:

determining, by the first base station, a second cooperative transmission area among the first base station, the second base station and the third base station;

assigning, by the first base station, second common CSI-RS resources for coordinated transmission to the second coordinated transmission area;

When the terminal enters the second coordinated transmission area, the terminal is allocated the second common CSI-RS resource.

When there are multiple base stations, the cooperative transmission areas of the multiple base stations and the corresponding common CSI-RS resources can also be determined, and the common CSI-RS resources are allocated to the cooperative transmission areas of the multiple base stations, thereby improving resource utilization. and cell throughput.

In a possible implementation, the method further includes:

receiving, by the first base station, a second measurement result reported by the terminal after using the second common CSI-RS resource to measure a channel state;

If the channel state between the first base station and the terminal satisfies the requirement of cooperative transmission, the second base station and the third base station are notified to perform cooperative transmission.

In a possible implementation, the method further includes:

If the second coordinated transmission area is located in the first coordinated transmission area, the terminal is allocated the first common CSI-RS resource or the second common CSI-RS resource according to at least one of the following information decisions:

the load situation of the first base station;

The load situation of each base station;

the location of the terminal;

the priority of the service to be transmitted by the terminal;

the priority of the terminal.

When multiple coordinated transmission areas overlap, one common CSI-RS resource can be selected for delivery as required.

In a possible implementation, the method further includes:

if the second coordinated transmission area is located in the first coordinated transmission area, allocating the first common CSI-RS resource and the second common CSI-RS resource to the terminal;

receiving, by the terminal, a first measurement result reported after using the first common CSI-RS resource to measure the channel state, and a second measurement result reported after using the second common CSI-RS resource to measure the channel state;

comparing the first measurement with the second measurement;

if the first measurement result is better than the second measurement result, notifying the second base station to perform cooperative transmission;

If the second measurement result is better than the first measurement result, the second base station and the third base station are notified to perform cooperative transmission.

When multiple coordinated transmission areas overlap, multiple common CSI-RS resources can be selected for delivery as required, and then the base station for coordinated transmission is determined according to the comparison of the measurement results.

In a second aspect, an embodiment of the present application provides a method for cooperative transmission, which may include:

When the terminal enters the first coordinated transmission area, the terminal receives the first common CSI-RS resource allocated by the first base station, wherein the first coordinated transmission area is the signal overlapping coverage area of the first base station and the second base station;

Channel state measurement is performed according to the first common CSI-RS resource, and a first measurement result is sent to the first base station.

In a possible implementation, the method further includes:

When the terminal enters the second coordinated transmission area, the terminal receives the second common CSI-RS resource allocated by the first base station, where the second coordinated transmission area is the information of the first base station, the second base station and the third base station. Signal overlapping coverage area;

Channel state measurement is performed according to the second common CSI-RS resource, and a second measurement result is sent to the first base station.

In a possible implementation, the method further includes:

If the second coordinated transmission area is located in the first coordinated transmission area, receive a first common CSI-RS resource or a second common CSI-RS resource allocated by the first base station according to at least one of the following information decisions :

the load situation of the first base station;

The load situation of each base station;

the location of the terminal;

the priority of the service to be transmitted by the terminal;

the priority of the terminal.

In a possible implementation, the method further includes:

If the second coordinated transmission area is located in the first coordinated transmission area, receiving the first common CSI-RS resource and the second common CSI-RS resource allocated by the first base station;

sending the first measurement result and the second measurement result to the first base station, so that the first base station determines the base station for cooperative transmission according to the comparison of the first measurement result and the second measurement result; or The terminal compares the first measurement result and the second measurement result, and sends the optimal measurement result among the first measurement result and the second measurement result to the first base station, so that the first The base station determines the base station for cooperative transmission.

In a third aspect, embodiments of the present application provide a base station, which may include:

a processing unit, configured to determine a first cooperative transmission area between the base station and the second base station, wherein the first cooperative transmission area is the signal overlapping coverage area of the base station and the second base station; The first coordinated transmission region allocates first common CSI-RS resources for coordinated transmission;

A transceiver unit, configured to allocate the first common CSI-RS resource to the terminal according to an instruction of the processing unit when the terminal enters the first cooperative transmission area.

In a possible implementation manner, the transceiver unit is further used for:

receiving a first measurement result reported by the terminal after using the first common CSI-RS resource to measure a channel state;

If the channel state between the base station and the terminal satisfies the requirement of cooperative transmission, the second base station is notified to perform cooperative transmission.

In a possible implementation manner, the processing unit is further configured to:

determining a second cooperative transmission area between the base station, the second base station and the third base station;

allocating a second common CSI-RS resource for coordinated transmission for the second coordinated transmission region;

When the terminal enters the second coordinated transmission area, the second common CSI-RS resource is allocated to the terminal through the transceiver unit.

In a possible implementation manner, the transceiver unit is further used for:

receiving a second measurement result reported by the terminal after using the second common CSI-RS resource to measure the channel state;

If the channel state between the base station and the terminal satisfies the requirement of cooperative transmission, the second base station and the third base station are notified to perform cooperative transmission.

the load situation of the base station;

The load situation of each base station;

the location of the terminal;

the priority of the service to be transmitted by the terminal;

the priority of the terminal.

if the second coordinated transmission area is located in the first coordinated transmission area, allocating the first common CSI-RS resource and the second common CSI-RS resource to the terminal through the transceiver unit;

The transceiver unit is further configured to receive a first measurement result reported by the terminal after using the first common CSI-RS resource to measure the channel state, and a first measurement result reported after using the second common CSI-RS resource to measure the channel state. 2. Measurement results;

The processing unit is further configured to compare the first measurement result with the second measurement result; if the first measurement result is better than the second measurement result, notify the second base station through the transceiver unit Perform cooperative transmission; if the second measurement result is better than the first measurement result, notify the second base station and the third base station to perform cooperative transmission through the transceiver unit.

In a fourth aspect, an embodiment of the present application provides a terminal, which may include:

a transceiver unit, configured to receive the first CSI-RS resource allocated by the first base station when the terminal enters the first coordinated transmission area, where the first coordinated transmission area is the area between the first base station and the second base station Signal overlapping coverage area;

A processing unit, configured to perform channel state measurement according to the first common CSI-RS resource, and send a first measurement result to the first base station through the transceiver unit.

In a possible implementation manner, the transceiver unit is further configured to receive a second common CSI-RS resource allocated by the first base station when the terminal enters a second coordinated transmission area, wherein the second coordinated transmission The area is the overlapping coverage area of the signals of the first base station, the second base station and the third base station;

The processing unit is further configured to perform channel state measurement according to the second common CSI-RS resource, and send the second measurement result to the first base station through the transceiver unit.

In a possible implementation manner, if the second cooperative transmission area is located in the first cooperative transmission area, the transceiver unit is further configured to receive the allocation after the first base station makes a decision according to at least one of the following information The first common CSI-RS resource or the second common CSI-RS resource:

the load situation of the first base station;

The load situation of each base station;

the location of the terminal;

the priority of the service to be transmitted by the terminal;

the priority of the terminal.

In a possible implementation manner, the transceiver unit is further used for:

The processing unit is further configured to send the first measurement result and the second measurement result to the first base station through the transceiver unit, so that the first base station can use the first measurement result and the second measurement result The comparison of the measurement results determines the base station for cooperative transmission; or the processing unit is further configured to compare the first measurement result and the second measurement result, and determine the optimal one between the first measurement result and the second measurement result The measurement result is sent to the first base station, so that the first base station determines the base station for cooperative transmission.

In a fifth aspect, an apparatus is provided. The apparatus provided in this application has the function of implementing the behavior of the base station or the terminal in the above method aspect, and includes components (means) corresponding to the steps or functions described in the above method aspect. The steps or functions can be implemented by software, or by hardware (eg, circuits), or by a combination of hardware and software.

In one possible design, the apparatus described above includes one or more processors and communication units. The one or more processors are configured to support the apparatus to perform the corresponding functions of the base station in the above method. For example, a cooperative transmission area with other base stations is determined, common CSI-RS resources are allocated to the cooperative transmission area, and when the terminal enters the cooperative transmission area, the terminal is allocated the common CSI-RS resource corresponding to the cooperative transmission area. The communication unit is used to support the communication between the apparatus and other devices, and realize the function of receiving and/or sending. For example, the above-mentioned common CSI-RS resource is sent to the terminal, and the measurement result sent by the terminal is received.

Optionally, the apparatus may further include one or more memories, which are coupled to the processor and store necessary program instructions and/or data of the apparatus. The one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

The apparatus may be a base station, a gNB or a TRP, etc., and the communication unit may be a transceiver or a transceiver circuit. Optionally, the transceiver may also be an input/output circuit or an interface.

The device may also be a communication chip. The communication unit may be an input/output circuit or an interface of a communication chip.

In another possible design, the above device includes a transceiver, a processor and a memory. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to run the computer program in the memory, so that the apparatus performs the first aspect or any one of the first aspects It is possible to implement the method performed by the base station in the manner.

In one possible design, the apparatus described above includes one or more processors and communication units. The one or more processors are configured to support the apparatus to perform the corresponding functions of the terminal in the above method. For example, the channel state and the like are measured using common CSI-RS resources allocated by the base station. The communication unit is used to support the communication between the apparatus and other devices, and realize the function of receiving and/or sending. For example, the common CSI-RS resource sent by the base station is received, and the channel measurement result is sent to the base station.

Optionally, the apparatus may further include one or more memories, which are coupled to the processor and store necessary program instructions and/or data of the network device. The one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

The apparatus may be a smart terminal or a wearable device, etc., and the communication unit may be a transceiver or a transceiver circuit. Optionally, the transceiver may also be an input/output circuit or an interface.

In another possible design, the above device includes a transceiver, a processor and a memory. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to run the computer program in the memory, so that the apparatus performs the second aspect or any of the second aspects. The method that the terminal completes in the implementation.

In a sixth aspect, a system is provided, and the system includes the above-mentioned base station and terminal.

In a seventh aspect, a computer-readable storage medium is provided for storing a computer program, the computer program comprising instructions for performing the method in the first aspect or any one of the possible implementations of the first aspect.

In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, the computer program comprising instructions for performing the method in the second aspect or any possible implementation manner of the second aspect.

In a ninth aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is run on a computer, the computer is made to execute the first aspect or any one of the first aspects methods in possible implementations.

In a tenth aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to execute any one of the second aspect and the second aspect above methods in possible implementations.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the accompanying drawings required in the embodiments or the background technology of the present application will be described below.

FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

FIG. 2 is a schematic flowchart of a method for cooperative transmission provided by an embodiment of the present application;

3 is a schematic flowchart of another method for cooperative transmission provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of the composition of a base station according to an embodiment of the present application;

FIG. 5 is a schematic diagram of the composition of another base station according to an embodiment of the present application;

FIG. 6 is a schematic diagram of the composition of a terminal according to an embodiment of the present application;

FIG. 7 is a schematic diagram of the composition of another terminal according to an embodiment of the present application.

detailed description

The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

The terms "comprising" and "having", and any variations thereof, in the description and claims of this application and the above figures are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

The method and device for cooperative transmission according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 , which is a schematic structural diagram of a communication system in an embodiment of the present invention. It may include at least two base stations and at least one terminal. When there are multiple terminals, multiple terminals entering the coordinated transmission area can use the common CSI-RS resources corresponding to the coordinated transmission area.

Wherein, the base station 10 and the base station 20 may be an NR base station (gNB), an evolved Node B (evolved Node B, referred to as eNB), a Node B (Node B, referred to as NB), a Base Station Controller (Base Station Controller, referred to as BSC), Base Transceiver Station (BTS for short), home base station (for example, Home evolved NodeB, or Home Node B, HNB for short), baseband unit (BaseBand Unit, BBU for short), etc. It may also be called a base station transceiver, a wireless base station, a wireless transceiver, a transceiver function, a Base Station Subsystem (BSS for short) or some other appropriate term by those skilled in the art. It is an entity on the network side for transmitting or receiving signals. In the embodiment of the present application, the base station 10, as the base station corresponding to the serving cell, may also be called the main base station, and can identify the cooperative transmission area with the base station 20, which is The cooperative transmission area allocates corresponding common CSI-RS resources, and allocates the common CSI-RS resources to the terminal 30 entering the cooperative transmission area. As a base station corresponding to a coordinated cell, the base station 20 may also be called a secondary base station, a secondary base station or a coordinated base station, and may perform coordinated transmission with the base station 10 . The identities of base station 10 and base station 20 may be interchanged.

The terminal 30 may also be referred to as user equipment (User Equipment, UE for short). It may include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptop computers, Personal Digital Assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (eg MP3 players), cameras, game consoles, or any other similarly functioning device. A terminal may also be referred to by those skilled in the art as a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile Terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or some other appropriate term. It is an entity on the user side for receiving signals or transmitting signals. In this embodiment of the present application, the terminal 30 can receive the common CSI-RS resources sent by the base station 10, and perform channel state measurement according to the common CSI-RS resources. , and feedback the measurement results, so as to realize the effect that multiple terminals share common CSI-RS resources to realize cooperative transmission. For simplicity of description, only one terminal 30 is shown in this embodiment of the present application. In an actual scenario, the number of terminals 30 may be one or more, and some terminals may also serve as relay devices, which may send downlink information to other terminals, and A user group may also be formed between the terminals, which is not limited in this embodiment of the present application.

In the time domain, common CSI-RS resources can be configured for periodic transmission, semi-persistent transmission or aperiodic transmission.

For periodic transmission, the common CSI-RS resource is repeated every minimum 4 time slots and once every 640 time slots at most.

For semi-persistent transmission, the common CSI-RS resource is also configured with a transmission period, but whether the actual transmission is actually determined depends on the explicit activation of the MAC control source. Once activated, it will continue to be sent periodically until the explicit until the command is activated.

For aperiodic transmission, the network side does not configure the transmission period, but explicitly notifies each transmission of the common CSI-RS resources through signaling.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a method for cooperative transmission provided by an embodiment of the present application; it specifically includes the following steps:

S201. The first base station determines a first coordinated transmission area between the first base station and the second base station.

The first cooperative transmission area is an overlapping coverage area of signals of the first base station and the second base station.

S202. The first base station allocates first common CSI-RS resources for coordinated transmission to the first coordinated transmission area.

S203. When the terminal enters the first coordinated transmission area, allocate the first common CSI-RS resource to the terminal.

After receiving the first common CSI-RS resource, the terminal may perform channel state measurement according to the first common CSI-RS resource, and send the first measurement result to the first base station.

Here, the number of terminals entering the first cooperative transmission area may be multiple. In this case, the base station may allocate the first common CSI-RS resource to the multiple terminals, and each terminal may use the first common CSI-RS resource for Measurement of channel state.

Optionally, after step S203, it can also include:

S204. The first base station receives the first measurement result reported by the terminal after using the first common CSI-RS resource to measure the channel state.

S205. If the channel state between the first base station and the terminal satisfies the cooperative transmission requirement, notify the second base station to perform cooperative transmission.

Optionally, when the first measurement result is poor, cooperative transmission may not be performed.

In the embodiment of the present application, the base station determines the cooperative transmission area with other base stations, and allocates the corresponding public CSI-RS resources for the cooperative transmission area. When each terminal enters the cooperative transmission area, the base station can allocate the corresponding The common CSI-RS resources corresponding to the cooperative transmission area, each terminal can use the common CSI-RS resources to measure the channel state, thus greatly improving the utilization of CSI-RS resources and the throughput performance of the cell, which is a great deal for a large number of The scenario where the terminal exists provides a solution with limited CSI-RS resources.

It should be noted that, in the embodiments of the present application, the base station and the terminal are mainly used as examples for description, and the methods in the embodiments of the present application are also applicable to two or more connections in a wireless local area network (WLAN for short). An Access Point (AP for short) is a scenario where terminals perform cooperative transmission.

Please refer to FIG. 3, which is a schematic flowchart of another method for cooperative transmission provided by an embodiment of the present application; including:

S301. The first base station determines a second cooperative transmission area among the first base station, the second base station and the third base station.

S302. The first base station allocates second common CSI-RS resources for coordinated transmission to the second coordinated transmission area.

S303. When the terminal enters the second coordinated transmission area, allocate the second common CSI-RS resource to the terminal.

After receiving the second common CSI-RS resource allocated by the first base station, the terminal may perform channel state measurement according to the second common CSI-RS resource, and send the second measurement result to the first base station .

Optionally, after step S303, the following steps may also be included:

Since there may be overlapping areas in each coordination area, the base station can further decide which common CSI-RS resource to send to the terminal, or can send multiple common CSI-RS resources to the terminal, and then compare different measurement results to determine which common CSI-RS resource to send to the terminal. A base station for cooperative transmission is selected, or the number of base stations for cooperative transmission may also be determined according to service requirements or terminal requirements, and then which CSI-RS resource to send is determined according to the number.

For example, in another possible implementation manner, if the second coordinated transmission area is located in the first coordinated transmission area, the first base station may decide to allocate the first coordinated transmission area to the terminal according to at least one of the following information A common CSI-RS resource or a second common CSI-RS resource:

The load situation of the first base station; for example, if the load of the first base station is low, the two base stations can complete the cooperative transmission, and at this time, the first common CSI-RS resource can be selected to be sent. If the load of the first base station is relatively high, the coordinated transmission can be completed by three base stations, and at this time, the second common CSI-RS resource can be selected to be sent.

Load conditions of each base station; for example, one or two base stations with lower loads may be selected to perform cooperative transmission with the first base station.

The location of the terminal; for example, if the terminal is at the edge of the second base station, the third base station or the second base station and the third base station can be selected for cooperative transmission at this time.

The priority of the service to be transmitted by the terminal; when the priority of the service to be transmitted is high, the second common CSI-RS resource can be sent, and multi-base station cooperative transmission is adopted, and the first common CSI can be sent when the priority of the service to be transmitted is low -RS resources, using dual base station cooperative transmission.

the priority of the terminal. For example, when the terminal priority is high, the second common CSI-RS resource can be sent, and multi-base station cooperative transmission is used; when the terminal priority is low, the first common CSI-RS resource can be sent, and dual base station cooperative transmission is used.

In another possible implementation manner, if the second coordinated transmission area is located in the first coordinated transmission area, the terminal is allocated the first common CSI-RS resource and the second common CSI-RS resource;

comparing the first measurement with the second measurement;

It should be noted that, in order to simplify the description, in the embodiments of the present application, the scenarios of dual base stations and three base stations are mainly used for illustration. The method performs similar cooperative transmission, which is not limited in any embodiment of the present application.

For the flow of the method performed by the terminal side, reference may be made to the description of the method performed by the terminal in the corresponding embodiments of FIG. 2 and FIG. 3 , and details are not repeated here.

Please refer to FIG. 4 , which is a schematic diagram of the composition of a base station according to an embodiment of the present application; it may include:

The processing unit 100 is configured to determine a first cooperative transmission area between the base station and the second base station, wherein the first cooperative transmission area is the signal overlapping coverage area of the base station and the second base station; The first coordinated transmission region allocates first common channel state indication reference signal CSI-RS resources for coordinated transmission;

The transceiver unit 200 is configured to allocate the first common CSI-RS resource to the terminal according to the instruction of the processing unit 100 when the terminal enters the first coordinated transmission area.

Optionally, the transceiver unit 200 is further configured to:

Optionally, the processing unit 100 is further configured to:

When the terminal enters the second cooperative transmission area, the second common CSI-RS resource is allocated to the terminal through the transceiver unit 200 .

Optionally, the transceiver unit 200 is further configured to:

Optionally, the processing unit 100 is further configured to:

the load situation of the base station;

The load situation of each base station;

the location of the terminal;

the priority of the service to be transmitted by the terminal;

the priority of the terminal.

Optionally, the processing unit 100 is further configured to:

If the second coordinated transmission area is located in the first coordinated transmission area, the first common CSI-RS resource and the second common CSI-RS resource are allocated to the terminal by the transceiver unit 200;

The transceiver unit 200 is further configured to receive a first measurement result reported by the terminal after using the first common CSI-RS resource to measure the channel state, and a first measurement result reported after using the second common CSI-RS resource to measure the channel state. the second measurement result;

The processing unit 100 is further configured to compare the first measurement result and the second measurement result; if the first measurement result is better than the second measurement result, notify the second measurement result through the transceiver unit. The base station performs cooperative transmission; if the second measurement result is better than the first measurement result, the transceiver unit 200 notifies the second base station and the third base station to perform cooperative transmission.

For concepts related to the technical solutions provided by the embodiments of the present application involved in the base station, for explanations and detailed descriptions, and other steps, please refer to the descriptions of the foregoing methods or other embodiments, which will not be repeated here.

Please refer to FIG. 5 , which is a schematic diagram of the composition of another base station according to an embodiment of the present application; as shown in FIG. 5 , the base station may include a processor 110 , a memory 120 and a bus 130 . The processor 110 and the memory 120 are connected through a bus 130, the memory 120 is used for storing instructions, and the processor 110 is used for executing the instructions stored in the memory 120 to implement the steps in the method corresponding to FIG. 2 above.

Further, the base station may further include an input port 140 and an output port 150 . The processor 110 , the memory 120 , the input port 140 and the output port 150 may be connected through the bus 130 .

The processor 110 is configured to execute the instructions stored in the memory 120 to control the input port 140 to receive signals, and control the output port 150 to send signals, so as to complete the steps performed by the base station in the above method. The input port 140 and the output port 150 may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as input and output ports. The memory 120 may be integrated in the processor 110 , or may be provided separately from the processor 110 .

As an implementation manner, the functions of the input port 140 and the output port 150 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 110 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, a general-purpose computer may be used to implement the base station provided in the embodiment of the present application. The program codes that will implement the functions of the processor 110, the input port 140 and the output port 150 are stored in the memory, and the general-purpose processor implements the functions of the processor 110, the input port 140 and the output port 150 by executing the codes in the memory.

Please refer to FIG. 6 , which is a schematic diagram of the composition of a terminal according to an embodiment of the present application; it may include:

The transceiver unit 300 is configured to receive a first common channel state indication reference signal CSI-RS resource allocated by a first base station when the terminal enters a first coordinated transmission area, wherein the first coordinated transmission area is the first coordinated transmission area. Signal overlapping coverage areas of a base station and a second base station;

The processing unit 400 is configured to perform channel state measurement according to the first common CSI-RS resource, and send the first measurement result to the first base station through the transceiver unit.

Optionally, the transceiver unit 300 is further configured to receive a second common CSI-RS resource allocated by the first base station when the terminal enters a second coordinated transmission area, where the second coordinated transmission area is the Signal overlapping coverage areas of the first base station, the second base station and the third base station;

The processing unit 400 is further configured to perform channel state measurement according to the second common CSI-RS resource, and send the second measurement result to the first base station through the transceiver unit.

Optionally, if the second cooperative transmission area is located in the first cooperative transmission area, the transceiver unit 300 is further configured to receive the first public information allocated by the first base station after a decision according to at least one of the following information: CSI-RS resource or second common CSI-RS resource:

the load situation of the first base station;

The load situation of each base station;

the location of the terminal;

the priority of the service to be transmitted by the terminal;

the priority of the terminal.

Optionally, the transceiver unit is also used for:

The processing unit 400 is further configured to send the first measurement result and the second measurement result to the first base station through the transceiver unit 300, so that the first base station can use the first measurement result and the The comparison of the second measurement result determines the base station for cooperative transmission; or the processing unit 400 is further configured to compare the first measurement result and the second measurement result, and compare the first measurement result and the second measurement result The best measurement result among the first base stations is sent to the first base station, so that the first base station determines the base station for cooperative transmission.

For concepts related to the technical solutions provided by the embodiments of the present application involved in the terminal, for explanations and detailed descriptions, and other steps, please refer to the descriptions of the foregoing methods or other embodiments, which will not be repeated here.

Please refer to FIG. 7 , which is a schematic diagram of the composition of another terminal provided in an embodiment of the application; as shown in FIG. 7 , the terminal may include a processor 210, a memory 220, and a bus 230. The processor 210 and the memory 220 are connected through a bus 230, the memory 220 is used to store instructions, and the processor 210 is used to execute the instructions stored in the memory 220, so as to implement the steps performed by the terminal in the method corresponding to FIG. 3 above.

Further, the terminal may further include an input port 240 and an output port 250 . The processor 210 , the memory 220 , the input port 240 and the output port 250 may be connected through the bus 230 .

The processor 210 is configured to execute the instructions stored in the memory 220 to control the input port 240 to receive signals, and control the output port 250 to send signals, so as to complete the steps performed by the terminal in the above method. The input port 240 and the output port 250 may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as input and output ports. The memory 220 may be integrated in the processor 210, or may be provided separately from the processor 210.

As an implementation manner, the functions of the input port 240 and the output port 250 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 210 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, a general-purpose computer may be used to implement the terminal provided by the embodiments of the present application. The program codes that will implement the functions of the processor 210, the input port 240 and the output port 250 are stored in the memory, and the general-purpose processor implements the functions of the processor 210, the input port 240 and the output port 250 by executing the codes in the memory.

Those skilled in the art can understand that, for the convenience of description, only one memory and one processor are shown in FIG. 5 and FIG. 7 . In an actual controller, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.

It should be understood that, in this embodiment of the present application, the processor may be a central processing unit (Central Processing Unit, referred to as CPU), and the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processing, referred to as DSP), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

The memory, which may include read-only memory and random access memory, provides instructions and data to the processor. A portion of the memory may also include non-volatile random access memory.

In addition to the data bus, the bus may also include a power bus, a control bus, a status signal bus, and the like. However, for the sake of clarity, the various buses are labeled as buses in the figure.

In the implementation process, each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.

According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a system, which includes the aforementioned base station, terminal, and the like.

In various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, rather than the implementation process of the embodiments of the present application. constitute any limitation.

Those of ordinary skill in the art can appreciate that the various illustrative logical blocks (ILBs) and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. accomplish. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. 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. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state drives), and the like.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A method for cooperative transmission, comprising:

The first base station determines a first cooperative transmission area between the first base station and the second base station, where the first cooperative transmission area is a signal overlapping coverage area of the first base station and the second base station;

assigning, by the first base station, a first common channel state indication reference signal CSI-RS resource for coordinated transmission to the first coordinated transmission area;

When the terminal enters the first coordinated transmission area, the terminal is allocated the first common CSI-RS resource.
The method according to claim 1, wherein the method further comprises:

receiving, by the first base station, a first measurement result reported by the terminal after using the first common CSI-RS resource to measure a channel state;

If the channel state between the first base station and the terminal satisfies the requirement of cooperative transmission, the second base station is notified to perform cooperative transmission.
The method according to claim 1, wherein the method further comprises:

determining, by the first base station, a second cooperative transmission area among the first base station, the second base station and the third base station;

assigning, by the first base station, second common CSI-RS resources for coordinated transmission to the second coordinated transmission area;

When the terminal enters the second coordinated transmission area, the terminal is allocated the second common CSI-RS resource.
The method according to claim 3, wherein the method further comprises:

receiving, by the first base station, a second measurement result reported by the terminal after using the second common CSI-RS resource to measure a channel state;

If the channel state between the first base station and the terminal satisfies the requirement of cooperative transmission, the second base station and the third base station are notified to perform cooperative transmission.
The method according to claim 3, wherein the method further comprises:

If the second coordinated transmission area is located in the first coordinated transmission area, the terminal is allocated the first common CSI-RS resource or the second common CSI-RS resource according to at least one of the following information decisions:

the load situation of the first base station;

The load situation of each base station;

the location of the terminal;

the priority of the service to be transmitted by the terminal;

the priority of the terminal.
The method according to claim 3, wherein the method further comprises:

if the second coordinated transmission area is located in the first coordinated transmission area, allocating the first common CSI-RS resource and the second common CSI-RS resource to the terminal;

receiving, by the terminal, a first measurement result reported after using the first common CSI-RS resource to measure the channel state, and a second measurement result reported after using the second common CSI-RS resource to measure the channel state;

comparing the first measurement with the second measurement;

if the first measurement result is better than the second measurement result, notifying the second base station to perform cooperative transmission;

If the second measurement result is better than the first measurement result, the second base station and the third base station are notified to perform cooperative transmission.
A method for cooperative transmission, comprising:

When the terminal enters the first coordinated transmission area, it receives the first common channel state indication reference signal CSI-RS resource allocated by the first base station, where the first coordinated transmission area is the signals of the first base station and the second base station overlapping coverage areas;

Channel state measurement is performed according to the first common CSI-RS resource, and a first measurement result is sent to the first base station.
The method according to claim 7, wherein the method further comprises:

When the terminal enters the second coordinated transmission area, the terminal receives the second common CSI-RS resource allocated by the first base station, where the second coordinated transmission area is the information of the first base station, the second base station and the third base station. Signal overlapping coverage area;

Channel state measurement is performed according to the second common CSI-RS resource, and a second measurement result is sent to the first base station.
The method according to claim 8, wherein the method further comprises:

If the second coordinated transmission area is located in the first coordinated transmission area, receive a first common CSI-RS resource or a second common CSI-RS resource allocated by the first base station according to at least one of the following information decisions :

the load situation of the first base station;

The load situation of each base station;

the location of the terminal;

the priority of the service to be transmitted by the terminal;

the priority of the terminal.
The method according to claim 8, wherein the method further comprises:

If the second coordinated transmission area is located in the first coordinated transmission area, receiving the first common CSI-RS resource and the second common CSI-RS resource allocated by the first base station;

sending the first measurement result and the second measurement result to the first base station, so that the first base station determines the base station for cooperative transmission according to the comparison of the first measurement result and the second measurement result; or The terminal compares the first measurement result and the second measurement result, and sends the optimal measurement result among the first measurement result and the second measurement result to the first base station, so that the first The base station determines the base station for cooperative transmission.
A base station, characterized in that it includes:

a processing unit, configured to determine a first cooperative transmission area between the base station and the second base station, wherein the first cooperative transmission area is the signal overlapping coverage area of the base station and the second base station; The first coordinated transmission region allocates first common channel state indication reference signal CSI-RS resources for coordinated transmission;

A transceiver unit, configured to allocate the first common CSI-RS resource to the terminal according to an instruction of the processing unit when the terminal enters the first cooperative transmission area.
The base station according to claim 11, wherein the transceiver unit is further configured to:

receiving a first measurement result reported by the terminal after using the first common CSI-RS resource to measure a channel state;

If the channel state between the base station and the terminal satisfies the requirement of cooperative transmission, the second base station is notified to perform cooperative transmission.
The base station according to claim 11, wherein the processing unit is further configured to:

determining a second cooperative transmission area between the base station, the second base station and the third base station;

allocating a second common CSI-RS resource for coordinated transmission for the second coordinated transmission region;

When the terminal enters the second coordinated transmission area, the second common CSI-RS resource is allocated to the terminal through the transceiver unit.
The base station according to claim 13, wherein the transceiver unit is further configured to:

receiving a second measurement result reported by the terminal after using the second common CSI-RS resource to measure the channel state;

If the channel state between the base station and the terminal satisfies the requirement of cooperative transmission, the second base station and the third base station are notified to perform cooperative transmission.
The base station according to claim 13, wherein the processing unit is further configured to:

If the second coordinated transmission area is located in the first coordinated transmission area, the terminal is allocated the first common CSI-RS resource or the second common CSI-RS resource according to at least one of the following information decisions:

the load situation of the base station;

The load situation of each base station;

the location of the terminal;

the priority of the service to be transmitted by the terminal;

the priority of the terminal.
The base station according to claim 13, wherein the processing unit is further configured to:

if the second coordinated transmission area is located in the first coordinated transmission area, allocating the first common CSI-RS resource and the second common CSI-RS resource to the terminal through the transceiver unit;

The transceiver unit is further configured to receive a first measurement result reported by the terminal after using the first common CSI-RS resource to measure the channel state, and a first measurement result reported after using the second common CSI-RS resource to measure the channel state. 2. Measurement results;

The processing unit is further configured to compare the first measurement result with the second measurement result; if the first measurement result is better than the second measurement result, notify the second base station through the transceiver unit Perform cooperative transmission; if the second measurement result is better than the first measurement result, notify the second base station and the third base station to perform cooperative transmission through the transceiver unit.
A terminal, characterized in that it includes:

A transceiver unit, configured to receive a first common channel state indication reference signal CSI-RS resource allocated by a first base station when the terminal enters a first coordinated transmission area, where the first coordinated transmission area is the first coordinated transmission area The signal overlapping coverage area of the base station and the second base station;

A processing unit, configured to perform channel state measurement according to the first common CSI-RS resource, and send a first measurement result to the first base station through the transceiver unit.
The terminal according to claim 17, wherein the transceiver unit is further configured to receive a second common CSI-RS resource allocated by the first base station when the terminal enters a second coordinated transmission area, wherein: The second cooperative transmission area is the signal overlapping coverage area of the first base station, the second base station and the third base station;

The processing unit is further configured to perform channel state measurement according to the second common CSI-RS resource, and send the second measurement result to the first base station through the transceiver unit.
The terminal according to claim 18, wherein if the second coordinated transmission area is located in the first coordinated transmission area, the transceiver unit is further configured to receive the first base station according to at least one of the following The first common CSI-RS resource or the second common CSI-RS resource allocated after the information decision is:

the load situation of the first base station;

The load situation of each base station;

the location of the terminal;

the priority of the service to be transmitted by the terminal;

the priority of the terminal.
The terminal according to claim 18, wherein the transceiver unit is further configured to:

If the second coordinated transmission area is located in the first coordinated transmission area, receiving the first common CSI-RS resource and the second common CSI-RS resource allocated by the first base station;

The processing unit is further configured to send the first measurement result and the second measurement result to the first base station through the transceiver unit, so that the first base station can use the first measurement result and the second measurement result The comparison of the measurement results determines the base station for cooperative transmission; or the processing unit is further configured to compare the first measurement result and the second measurement result, and determine the optimal one between the first measurement result and the second measurement result The measurement result is sent to the first base station, so that the first base station determines the base station for cooperative transmission.
A base station, comprising:

A processor, a memory and a bus, the processor and the memory are connected by a bus, wherein the memory is used for storing a set of program codes, the processor is used for calling the program codes stored in the memory, and executes the process as claimed in claim 1 The method of any one of -6.
A terminal, characterized in that it includes:

A processor, a memory, and a bus, the processor and the memory are connected by a bus, wherein the memory is used for storing a set of program codes, and the processor is used for calling the program codes stored in the memory, and executes as claimed in claim 7 - The method of any one of 10.
A computer-readable storage medium, comprising:

The computer-readable storage medium stores instructions that, when executed on a computer, implement the method of any one of claims 1-6.
A computer-readable storage medium, comprising:

The computer-readable storage medium has stored therein instructions which, when executed on a computer, implement the method of any one of claims 7-10.