WO2018171002A1

WO2018171002A1 - Data transmission method and device

Info

Publication number: WO2018171002A1
Application number: PCT/CN2017/082433
Authority: WO
Inventors: 李晓翠; 徐凯; 李国荣; 于小博
Original assignee: 华为技术有限公司
Priority date: 2017-03-24
Filing date: 2017-04-28
Publication date: 2018-09-27
Also published as: CN109565326A

Abstract

Provided are a data transmission method and device. The method comprises: acquiring, by means of a first base station, beam pattern information of a second base station, and transmitting, to a terminal apparatus, the beam pattern information of the second base station, such that the terminal apparatus can perform measurement on respective beams of the second base station according to the beam pattern information of the second base station; and acquiring interference parameters of the respective beams, and transmitting the same to the first base station, such that the first base station adjusts a transmit beam of the second base station according to interference measurement information, thereby mitigating influence of a hidden node.

Description

Data transmission method and device

Technical field

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

Background technique

With the rapid development of wireless communication technology, the Long-Termed-Assisted Access Using Long Term Evolution (LAA-LTE) technology has become one of the new Radio Access Technology (NRAT) technologies.

In the NR high-frequency scenario, different nodes in the unlicensed carrier may use channel resources using the directional Listening Before Talk (LBT) principle. Directional LBT can improve channel utilization in high frequencies, but there are hidden node problems.

Summary of the invention

The application provides a data transmission method and apparatus to reduce the impact of hidden nodes.

In a first aspect of the present application, a data transmission method is provided, including:

The second base station sends the beam mode information to the first base station, and the first base station sends the beam mode information of the second base station to the terminal device; the terminal device performs interference measurement for each beam according to the beam mode information of the second base station, and obtains interference. Measuring, the first base station receives the interference measurement information of the second base station that is sent by the terminal device, the first base station sends the interference measurement information to the second base station; The terminal device transmits data.

In this aspect, the beam mode information of the second base station is obtained by the interaction between the first base station and the second base station, and the first base station sends the beam mode information of the second base station to the terminal device, so that the terminal device according to each of the beam mode information The beam is measured to obtain the interference parameters of the beams, and the interference measurement information is generated. The first base station sends the interference measurement information to the second base station, so that the second base station adjusts the transmission beam according to the interference measurement information, thereby reducing the BS2 to the BS1. Interference, reducing the impact of hidden nodes.

In one possible design, the beam pattern information includes one or more of the following information:

The number of beams, the beam identifier, and the beam direction of the second base station.

In a possible design, the first base station receives beam mode information sent by the second base station, including:

The first base station receives beam mode information sent by the second base station by using an X2 interface.

In a possible design, the first base station sends a beam mode request message to the second base station, including:

The first base station sends a beam mode request message to the second base station by using an X2 interface.

In a possible design, the first base station sends the interference measurement information to the second base station, including:

The first base station sends the interference measurement information to the second base station by using an X2 interface.

The first base station sends a beam mode request message to the second base station, where the beam mode request message is used to request to acquire beam mode information of the second base station;

The first base station receives the beam mode information sent by the second base station.

The first base station receives beam mode information periodically sent by the second base station.

In a possible design, the first base station sends the beam mode information of the second base station to the terminal device, including:

The first base station periodically sends beam mode information of the second base station to the terminal device.

The first base station sends the beam mode information of the second base station to the terminal device aperiodically.

In a possible design, before the first base station receives the interference measurement information of the second base station sent by the terminal device, the method further includes:

Receiving, by the first base station, the first measurement report of the terminal device, where the first measurement report includes an identifier of the second base station, where the first measurement report is used to indicate that the interference of the terminal device is greater than a preset Threshold.

In a possible design, the first base station receives the first measurement report of the terminal device, including:

The first base station receives a first measurement report that is periodically sent by the terminal device.

In a possible design, the first base station receives the interference measurement information of the second base station that is sent by the terminal device, and includes:

The first base station receives the interference measurement information of the second base station that is sent by the terminal device by using the PUSCH or the PUCCH.

In a possible design, the interference measurement information includes a beam identifier and an interference parameter value corresponding to the beam identifier.

The first base station sends the beam mode information of the second base station to the terminal device by using a physical downlink control channel PDCCH, a medium access control MAC signaling, a system message, or a dedicated radio resource control RRC message.

In a second aspect of the present application, a data transmission method is provided, including:

Transmitting, by the second base station, beam mode information to the first base station;

The second base station receives interference measurement information sent by the first base station;

The second base station adjusts a transmit beam of the second base station according to the interference measurement information.

The number of beams, the beam identifier, and the beam direction of the second base station;

In a possible design, before the sending, by the second base station, the beam mode information to the first base station, the method further includes:

The second base station receives a beam mode request message sent by the first base station, where the beam mode request message is used to request to acquire beam mode information of the second base station.

In a possible design, the second base station sends beam mode information to the first base station, including:

The second base station sends the beam mode information to the first base station by using an X2 interface.

The second base station periodically transmits the beam mode information to the first base station.

In a possible design, the interference measurement information includes a beam identifier and a corresponding identifier of the beam identifier. Disturbance parameter value.

A third aspect of the present application provides a data transmission method, including:

Receiving, by the terminal device, beam mode information of the second base station sent by the first base station;

The terminal device performs interference measurement on the second base station according to beam mode information of the second base station;

The terminal device sends the interference measurement information of the second base station to the first base station.

In a possible design, the terminal device receives beam mode information of the second base station sent by the first base station, including:

The terminal device receives the beam mode information of the second base station sent by the first base station by using a physical downlink control channel PDCCH, a medium access control MAC signaling, a system message, or a dedicated radio resource control RRC message.

The terminal device periodically receives beam mode information of the second base station sent by the first base station.

The terminal device receives the beam mode information of the second base station sent by the first base station aperiodically.

In a fourth aspect, the application provides a data transmission apparatus, including:

a receiver, configured to receive beam mode information sent by the second base station;

a transmitter, configured to send, to the terminal device, beam mode information of the second base station;

The receiver is further configured to receive interference measurement information of the second base station that is sent by the terminal device;

The transmitter is further configured to send the interference measurement information to the second base station;

The transmitter is further configured to send data to the terminal device by using a preset beam.

In a possible design, the receiver is specifically configured to receive beam mode information sent by the second base station by using an X2 interface.

In a possible design, the receiver is specifically configured to receive beam mode information periodically sent by the second base station.

In a possible design, the transmitter is specifically configured to periodically send beam mode information of the second base station to the terminal device.

In a possible design, the transmitter is specifically configured to send the beam mode information of the second base station to the terminal device aperiodically.

In a possible design, the transmitter is specifically configured to send the second base station to the terminal device by using a physical downlink control channel PDCCH, a medium access control MAC signaling, a system message, or a dedicated radio resource control RRC message. Beam mode information.

In a fifth aspect, the application provides a data transmission apparatus, including:

a transmitter, configured to send beam mode information to the first base station;

a receiver, configured to receive interference measurement information sent by the first base station;

And a processor, configured to adjust a transmit beam of the second base station according to the interference measurement information.

In a possible design, the transmitter is specifically configured to send the beam mode information to the first base station by using an X2 interface.

In a possible design, the transmitter is specifically configured to periodically send the beam mode information to the first base station.

In a sixth aspect, the application provides a data transmission apparatus, including:

a receiver, configured to receive beam mode information of the second base station sent by the first base station;

a processor, configured to perform interference measurement on the second base station according to beam mode information of the second base station;

And a transmitter, configured to send interference measurement information of the second base station to the first base station.

In a possible design, the receiver is specifically configured to receive, by using a physical downlink control channel PDCCH, a medium access control MAC signaling, a system message, or a dedicated radio resource control RRC message, the first base station to send the first Beam mode information of the two base stations.

In a possible design, the receiver is specifically configured to receive beam mode information of the second base station sent by the first base station.

In a possible design, the receiver is specifically configured to receive beam mode information of the second base station sent by the first base station aperiodically.

DRAWINGS

FIG. 1 is a schematic diagram of an application scenario provided by the present application;

2 is a schematic flowchart of a data transmission method provided by the present application;

FIG. 3 is a schematic flowchart of information interaction between BS1 and BS2 provided by the present application;

4 is another schematic flowchart of information interaction between BS1 and BS2 provided by the present application;

FIG. 5 is a schematic structural diagram of a data transmission apparatus provided by the present application; FIG.

FIG. 6 is a schematic structural diagram of another data transmission apparatus provided by the present application; FIG.

FIG. 7 is a schematic structural diagram of still another data transmission apparatus provided by the present application.

detailed description

1 is a schematic diagram of an application scenario provided by the present application. The application scenario of the present application includes at least two base stations (BSs) and at least two terminal devices, where at least two terminal devices are simultaneously at least two base stations. In the communication range, two base stations and two terminal devices are taken as an example in FIG. 1, the base stations are BS1 and BS2, respectively; the terminal devices are UE1 and UE2, respectively, wherein communication between BS1 and BS2 and UE1, and BS1 and BS2 are respectively Communication with UE2 takes place in an unlicensed band. In the scenario shown in Figure 1, BS1 and BS2 compete for channel resources using the Listen Before Talk (LBT) principle. In the prior art, before the beam 1 sends data to the UE1, the BS1 detects whether there is an interfering BS around, and when the detected interference value is less than a preset value, as shown in FIG. 1, that is, BS1 does not detect the existence of BS2, The UE1 communicates with the UE1 in the direction of the beam 1, and at this time, the BS2 transmits data to the UE2 through the beam 2, and both UE1 and UE2 are in the communication range of BS1 and BS2, causing mutual interference, so that BS1 and UE1 and BS2 and Data transmission between UE2 failed. Among them, BS2 and BS1 are hidden nodes of each other.

The present application reduces the impact of hidden nodes by the following embodiments. The following embodiments of the present application are performed by BS1 and UE1. Data transmission is described as an example.

2 is a schematic flowchart of a data transmission method provided by the present application. As shown in FIG. 2, the following process is included:

S201: BS2 sends beam mode information to BS1.

Optionally, BS2 may send beam mode information to BS1 through an X2 interface. The X2 interface is an air interface between BS1 and BS2.

The beam mode information includes one or more of the number of beams, beam identification, and beam direction of BS2. It may be the number of the beam, the beam identifier, and the beam direction of the BS2 in the preset time period. The length of the preset time period is determined according to the configuration of the BS2, which is not limited in this application. The number of beams may be M, and M is an integer greater than or equal to 1.

Optionally, the BS2 sends the beam mode information to the BS1, including but not limited to the following implementation manners:

One possible implementation manner is that BS2 periodically sends beam mode information to BS1.

Another possible implementation manner is: BS1 sends a beam mode request message to BS2, and a beam mode request message is used to request to acquire beam mode information of BS2; BS2 sends beam mode information to BS1 after receiving the beam mode request message. The BS1 may send a beam mode request message to the BS2 through the X2 interface. As shown in Figure 3.

S202: The BS1 sends the beam mode information of the BS2 to the UE1.

Optionally, the BS1 sends the beam information of the BS2 to the UE1 through the Uu interface.

Optionally, the BS1 may pass a Physical Downlink Control Channel (PDCCH), Medium Access Control (MAC) signaling, a system message, or a Radio Resource Control (RRC) message. The beam mode information of the BS2 is transmitted to the UE1, and the application does not limit this.

The manner in which the BS1 sends the beam mode information of the BS2 to the UE1 includes, but is not limited to, the following implementation manner.

A possible implementation manner is: BS1 periodically sends the beam mode information of BS2 to UE1.

Another possible implementation manner is: BS1 sends the beam mode information of BS2 to UE1 aperiodically. For example, BS1 transmits beam mode information of BS2 to UE1 before preparing to transmit data to UE1.

S203: The UE1 performs interference measurement on the BS2 according to the beam mode information of the BS2.

The UE1 performs measurement on each beam of the BS2 according to the beam mode of the BS2, and acquires interference measurement information of the BS2, where the interference measurement information includes interference parameters corresponding to N beams of the BS2, where N is an integer greater than or equal to 1 and less than or equal to An integer of M; that is, the interference measurement information may include an interference parameter corresponding to all beams of the BS2, or may only include an interference parameter corresponding to a beam whose interference parameter value is greater than a preset threshold.

The interference parameter may be a specific interference value, or may be an interference level, for example, level 1, level 2, level 3, etc., the higher the interference level, the more serious the interference, and the specific form of the interference parameter is not limited in this application.

S204: The UE1 sends the interference measurement information of the BS2 to the BS1.

Optionally, the UE1 may send the interference measurement information of the BS2 to the UE1 by using a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH).

S205: BS1 sends interference measurement information to BS2.

Optionally, the BS1 may send the interference measurement information to the BS2 through an X2 interface. As shown in Figure 4.

The interference measurement information includes a beam identifier and an interference parameter corresponding to the beam identifier.

Optionally, the beam identification may be expressed by a bitmap of the beam identification.

The interference parameter corresponding to the beam identification may be an interference value or an interference level.

S206: The BS2 adjusts the transmit beam of the BS2 according to the interference measurement information.

Optionally, BS2 may reduce the interference of BS2 to BS1 by adjusting the direction or power of the transmit beam of BS2.

For example, if the interference level corresponding to the beam 1 indicating the BS2 in the interference measurement information is 3, the BS2 can reduce the interference of the BS2 to the BS1 by not transmitting data in the beam 1, or reducing the transmission power of the beam 1.

S207: The BS1 sends data to the UE1 by using a preset beam.

In this embodiment, the beam mode information of the BS2 is obtained by the interaction between the BS1 and the BS2, and the beam mode information of the BS2 is transmitted to the UE1 through the BS1, so that the UE1 can measure each beam of the BS2 according to the beam mode information of the BS2, and obtain each beam. The interference parameter of the BS2 is sent by the UE1 to the BS1, so that the BS1 adjusts the transmission beam of the BS2 according to the interference measurement information, so as to reduce the interference of the BS2 on the BS1, thereby reducing the influence of the hidden node.

Optionally, before the step of the foregoing embodiment is performed, the UE1 may report the first measurement report to the BS1 periodically or aperiodically, where the first measurement report includes identifiers of other BSs whose interference to the UE1 is greater than a threshold, for example, If the interference of BS2 to UE1 is greater than a preset threshold, the identifier of BS2 is included. The base station performs the embodiment shown in FIG. 1 for each BS identifier according to the identifier of the BS in the first measurement report. The identifier of the BS2 is used as an example in FIG. If the identifiers of other BSs are included, the execution process for other BSs is similar to that of BS2, and details are not described herein again.

FIG. 5 is a schematic structural diagram of a data transmission apparatus according to the present application. The apparatus in this embodiment is deployed in a base station, where the apparatus in this embodiment includes a receiver 501 and a transmitter 502, where the receiver 501 is configured to receive the BS2 and send The transmitter mode 502 is configured to send the beam mode information of the second base station to the terminal device, where the receiver 501 is further configured to receive the interference measurement information of the second base station that is sent by the terminal device; The transmitter 502 is further configured to send the interference measurement information to the second base station; the transmitter 502 is further configured to send data to the terminal device by using a preset beam.

In the above embodiment, the beam pattern information includes one or more of the following information:

In the foregoing embodiment, the receiver 501 is specifically configured to receive beam mode information sent by the second base station by using an X2 interface.

In the above embodiment, the receiver 501 is specifically configured to receive beam mode information periodically sent by the second base station.

In the foregoing embodiment, the transmitter 502 is specifically configured to periodically send beam mode information of the second base station to the terminal device.

In the above embodiment, the transmitter 502 is specifically configured to send the beam mode information of the second base station to the terminal device aperiodically.

In the above embodiment, the transmitter 502 is specifically configured to send the second base station to the terminal device by using a physical downlink control channel PDCCH, a medium access control MAC signaling, a system message, or a dedicated radio resource control RRC message. Beam mode information.

The device in this embodiment is corresponding to the steps of performing the execution of the BS1 in the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 6 is a schematic structural diagram of another data transmission apparatus provided by the present application. The apparatus in this embodiment is deployed in a base station, where the apparatus in this embodiment includes a transmitter 601, a receiver 602, and a processor 603, where the transmitter 601 Used for The beam mode information is sent to the first base station; the receiver 602 is configured to receive the interference measurement information sent by the first base station; and the processor 603 is configured to adjust the transmit beam of the second base station according to the interference measurement information.

In the foregoing embodiment, the transmitter 502 is specifically configured to send the beam mode information to the first base station by using an X2 interface.

In the foregoing embodiment, the transmitter 502 is specifically configured to periodically send the beam mode information to the first base station.

The device in this embodiment is corresponding to the steps of performing the execution of the BS2 in the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 7 is a schematic structural diagram of still another data transmission apparatus provided by the present application. The apparatus of this embodiment is deployed in a terminal device. The apparatus in this embodiment includes: a receiver 701, a processor 702, and a transmitter 703, where The 701 is configured to receive beam mode information of the second base station that is sent by the first base station, where the processor 702 is configured to perform interference measurement on the second base station according to the beam mode information of the second base station, where the transmitter 703 is configured to The first base station sends interference measurement information of the second base station.

In the foregoing embodiment, the receiver 701 is specifically configured to receive, by using the physical downlink control channel PDCCH, the medium access control MAC signaling, the system message, or the dedicated radio resource control RRC message, the second Beam mode information of the base station.

In the foregoing embodiment, the receiver 701 is specifically configured to receive beam mode information of the second base station that is sent by the first base station.

In the foregoing embodiment, the receiver 701 is specifically configured to receive, by the aperiodically, beam mode information of the second base station that is sent by the first base station.

The device in this embodiment is corresponding to the steps of performing the execution of the UE1 in the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.

Claims

A data transmission method, comprising:

Receiving, by the first base station, beam mode information sent by the second base station;

Transmitting, by the first base station, beam mode information of the second base station to the terminal device;

Receiving, by the first base station, interference measurement information of the second base station that is sent by the terminal device;

Transmitting, by the first base station, the interference measurement information to the second base station;

The first base station sends data to the terminal device by using a preset beam.
The method of claim 1 wherein

The beam pattern information includes one or more of the following information:

The number of beams, the beam identifier, and the beam direction of the second base station.
The method according to claim 1 or 2, wherein the receiving, by the first base station, the beam mode information sent by the second base station comprises:

The first base station receives beam mode information sent by the second base station by using an X2 interface.
The method according to any one of claims 1-3, wherein the receiving, by the first base station, the beam mode information sent by the second base station comprises:

The first base station receives beam mode information periodically sent by the second base station.
The method according to any one of claims 1-4, wherein the transmitting, by the first base station, the beam mode information of the second base station to the terminal device comprises:

The first base station periodically sends beam mode information of the second base station to the terminal device.
The method according to any one of claims 1-4, wherein the transmitting, by the first base station, the beam mode information of the second base station to the terminal device comprises:

The first base station sends the beam mode information of the second base station to the terminal device aperiodically.
The method according to any one of claims 1-6, wherein the transmitting, by the first base station, the beam mode information of the second base station to the terminal device comprises:

The first base station sends the beam mode information of the second base station to the terminal device by using a physical downlink control channel PDCCH, a medium access control MAC signaling, a system message, or a dedicated radio resource control RRC message.
A data transmission method, comprising:

Transmitting, by the second base station, beam mode information to the first base station;

The second base station receives interference measurement information sent by the first base station;

The second base station adjusts a transmit beam of the second base station according to the interference measurement information.
The method of claim 8 wherein said beam pattern information comprises one or more of the following:

The number of beams, the beam identifier, and the beam direction of the second base station;
The method according to claim 8 or 9, wherein the sending, by the second base station, beam mode information to the first base station comprises:

The second base station sends the beam mode information to the first base station by using an X2 interface.
The method according to any one of claims 8 to 10, wherein the sending, by the second base station, beam mode information to the first base station comprises:

The second base station periodically transmits the beam mode information to the first base station.
A data transmission method, comprising:

Receiving, by the terminal device, beam mode information of the second base station sent by the first base station;

The terminal device performs interference measurement on the second base station according to beam mode information of the second base station;

The terminal device sends the interference measurement information of the second base station to the first base station.
The method according to claim 12, wherein the receiving, by the terminal device, the beam mode information of the second base station sent by the first base station comprises:

The terminal device receives the beam mode information of the second base station sent by the first base station by using a physical downlink control channel PDCCH, a medium access control MAC signaling, a system message, or a dedicated radio resource control RRC message.
The method according to claim 12 or 13, wherein the receiving, by the terminal device, the beam mode information of the second base station sent by the first base station comprises:

The terminal device periodically receives beam mode information of the second base station sent by the first base station.
The method according to claim 12 or 13, wherein the receiving, by the terminal device, the beam mode information of the second base station sent by the first base station comprises:

The terminal device receives the beam mode information of the second base station sent by the first base station aperiodically.
A data transmission device, comprising:

a receiver, configured to receive beam mode information sent by the second base station;

a transmitter, configured to send, to the terminal device, beam mode information of the second base station;

The receiver is further configured to receive interference measurement information of the second base station that is sent by the terminal device;

The transmitter is further configured to send the interference measurement information to the second base station;

The transmitter is further configured to send data to the terminal device by using a preset beam.
The apparatus of claim 16 wherein said beam pattern information comprises one or more of the following:

The number of beams, the beam identifier, and the beam direction of the second base station.
The device according to claim 16 or 17, wherein the receiver is specifically configured to receive beam mode information sent by the second base station by using an X2 interface.
The device according to any one of claims 16 to 18, wherein the receiver is specifically configured to receive beam mode information periodically sent by the second base station.
The device according to any one of claims 16 to 19, wherein the transmitter is specifically configured to periodically send beam mode information of the second base station to the terminal device.
The device according to any one of claims 16 to 19, wherein the transmitter is specifically configured to send beam mode information of the second base station to the terminal device aperiodically.
The device according to any one of claims 16 to 21, wherein the transmitter is specifically configured to control an RRC message by using a physical downlink control channel PDCCH, a medium access control MAC signaling, a system message, or a dedicated radio resource. The terminal device sends beam mode information of the second base station.
A data transmission device, comprising:

a transmitter, configured to send beam mode information to the first base station;

a receiver, configured to receive interference measurement information sent by the first base station;

And a processor, configured to adjust a transmit beam of the second base station according to the interference measurement information.
The apparatus according to claim 23, wherein said beam pattern information comprises one or more of the following information:

The number of beams, the beam identifier, and the beam direction of the second base station;
The device according to claim 23 or 24, wherein the transmitter is specifically configured to send the beam mode information to the first base station through an X2 interface.
The device according to any one of claims 23-25, wherein the transmitter is specifically configured to periodically send the beam mode information to a first base station.
A data transmission device, comprising:

a receiver, configured to receive beam mode information of the second base station sent by the first base station;

a processor, configured to perform interference measurement on the second base station according to beam mode information of the second base station;

And a transmitter, configured to send interference measurement information of the second base station to the first base station.
The apparatus according to claim 27, wherein the receiver is specifically configured to receive the first base station by using a physical downlink control channel PDCCH, a medium access control MAC signaling, a system message, or a dedicated radio resource control RRC message. Beam mode information of the second base station that is transmitted.
The apparatus according to claim 27 or 28, wherein the receiver is specifically configured to receive beam mode information of the second base station sent by the first base station.
The apparatus according to claim 27 or 28, wherein the receiver is specifically configured to receive beam mode information of the second base station sent by the first base station aperiodically.