WO2021179316A1

WO2021179316A1 - Beam selection method and communication apparatus

Info

Publication number: WO2021179316A1
Application number: PCT/CN2020/079326
Authority: WO
Inventors: 管鹏
Original assignee: 华为技术有限公司
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2021-09-16
Also published as: CN115244961A; CN115244961B

Abstract

The present application provides a beam selection method. A network side indicates, by configuring a beam spreading factor for a terminal device, that a network device can provide a beam for data transmission having a higher beam gain in addition to providing a beam for beam scanning, so that the terminal device considers, in the process of selecting a service beam, the factor of the beam spreading factor in addition to considering the measurement result of a reference signal corresponding to the beam for beam scanning, thus, the terminal device can be assisted to select a site that can provide a beam having a higher data transmission rate, thereby facilitating subsequent data transmission.

Description

Method for selecting beam and communication device

Technical field

This application relates to the field of wireless communication technology, and more specifically, to a method and communication device for selecting a beam.

Background technique

In a wireless communication system, in order to overcome path loss, network equipment and terminal equipment usually use directional high-gain antenna arrays to form analog beams for communication. The analog beam is directional. The narrower the beam width, the greater the antenna gain. Network devices and terminal devices can send and receive towards specific discoveries. Take the following line communication as an example. The network device sends in a specific direction, and the terminal device receives in a specific direction. Normal communication can be realized when the sending and receiving directions are aligned. In order to achieve beam alignment, beam training is required.

The downlink beam training is mainly realized by the terminal equipment through the measurement and feedback of the downlink reference signal. Network equipment uses different transmit beams to send different downlink reference signals, and configures the quality of the terminal equipment for specific downlink reference signals, for example, reference signal receiving power (RSRP) or signal to interference ratio (RSRP) and noise ratio, SINR) for measurement, and the terminal device is required to select several appropriate downlink reference signals by itself, and report their corresponding identification and quality.

In the existing solution, the terminal equipment basically selects the beam based on the quality of the reference signal. However, in practical applications, the quality of the reference signal is better. In many scenarios, it does not indicate that the beam is the optimal beam. The terminal device often selects the beam according to the quality of the reference signal, and the beam is not the optimal beam that is conducive to data transmission. Therefore, this method of beam selection is not conducive to data transmission.

Summary of the invention

This application provides a beam selection method, access network equipment, and terminal equipment, which can assist the terminal equipment in selecting a beam that is conducive to data transmission.

In the first aspect, this application provides a method for selecting beams. The method includes: a terminal device measures a reference signal from an access network device to obtain a measurement result of the reference signal; the terminal device sends a measurement report, the measurement report includes The one or more reference signal identifiers, the reference signal corresponding to the one or more reference signal identifiers are determined according to the beam spreading factor and the measurement result of the reference signal, and the beam spreading factor is used to adjust the reference signal Measurement results.

The network side configures a beam spreading factor for the terminal device to notify the terminal device that it can provide a beam with a higher beam gain for data transmission on the basis of providing a beam for beam scanning. The terminal device adjusts the measurement result of the reference signal corresponding to the beam used for beam scanning according to the beam spreading factor, which can assist the terminal device in selecting a site or beam that can provide a higher data transmission rate, which is beneficial to data transmission.

In the embodiments of the present application, the reference signal corresponding to the beam used for beam scanning is referred to as the first type reference signal, and the reference signal corresponding to the beam used for data transmission is referred to as the second type reference signal.

With reference to the first aspect, in an embodiment of the first aspect, the method further includes: the terminal device receives configuration information from the access network device, and the configuration information includes the beam spreading factor information.

By sending configuration information to the terminal device, the access network device can align the network side and the terminal device's principles of beam gain, beam measurement behavior, and beam selection method, avoid beam adaptation, and improve the performance of beam selection.

With reference to the first aspect, in another embodiment of the first aspect, before the terminal device receives the configuration information from the access network device, the method further includes: the terminal device sends capability information to the access network device, and the capability information is used for Instruct the terminal device to support selecting a reference signal based on the beam spreading factor.

With reference to the first aspect, in another embodiment of the first aspect, the configuration information includes spreading factor information, including: the configuration information includes one or more beam spreading factors, and each beam spreading factor corresponds to a reference signal, where each A beam spreading factor is used to adjust the measurement result of the corresponding reference signal; or,

The configuration information includes one or more beam spreading factors, each beam spreading factor corresponds to a reference signal set, and each beam spreading factor is used to adjust the measurement result of any reference signal in the corresponding reference signal set.

The access network equipment can realize different requirements for beam selection by configuring beam spreading factors of different granularities, for example, using reference signals as granularity or using a collection of reference signals as granularity. In some scenarios, configuring a beam spread factor with a smaller granularity can achieve fine control of beam selection. The smaller the granularity, the finer the control. In some scenarios, configuring a larger-granularity beam spreading factor can not only meet the performance requirements of beam selection, but also avoid unnecessary signaling overhead. The larger the granularity, the smaller the signaling overhead.

With reference to the first aspect, in another embodiment of the first aspect, the measurement report further includes an adjustment value of the measurement result of the reference signal corresponding to each reference signal identifier, wherein the adjustment of the measurement result of the reference signal The value is obtained by adjusting the measurement result of the reference signal according to the beam spreading factor corresponding to the reference signal.

With reference to the first aspect, in another embodiment of the first aspect, the measurement result is RSRP, and the terminal device measures the reference signal from the access network device to obtain the measurement result of the reference signal, including:

The terminal device measures at least two reference signals from the access network device to obtain respective RSRPs of the at least two reference signals;

The terminal device sends a measurement report, and the measurement report includes one or more reference signal identifiers, including:

According to the association relationship between the reference signal identifier and the station number, the terminal device determines that the first reference signal of the at least two reference signals comes from the first station, and the second reference signal of the at least two reference signals comes from the second station. Stations, where the second station is a service station of the terminal device, and the respective beams corresponding to the first reference signal and the second reference signal are used for beam scanning;

According to the RSRP of the first reference signal and the second reference signal and the beam spreading factor corresponding to the first reference signal and the second reference signal, the terminal device sends the measurement report to the access network device when the trigger condition is met. , The measurement report includes the identifier of the first reference signal, wherein the trigger condition is as follows:

The adjustment value of the RSRP of the first reference signal is higher than the RSRP of the second reference signal or the adjustment value of the RSRP of the second reference signal, where the adjustment value of the RSRP of the first reference signal is the first beam corresponding to the first reference signal The spreading factor is obtained by adjusting the RSRP of the first reference signal. When the second reference signal is configured with a second beam spreading factor, the adjustment value of the RSRP of the second reference signal is based on the second beam spreading factor. The RSRP of the second reference signal is adjusted.

The terminal device adjusts the measurement result of the measured reference signal used for beam scanning according to the beam spread factor configured on the network side, which helps to select a site that can provide the terminal device with a higher beam gain. When the adjusted value of the RSRP of the first reference signal sent by the first station is higher than the RSRP of the current serving station (that is, the second station) or its adjusted value, it indicates that the first station is capable of providing high beam gain for the terminal device The other beams of the beam corresponding to the first reference signal. Therefore, the terminal device reports the measurement report that includes the identifier of the first reference signal, and can switch to a site that is more conducive to data transmission, thereby increasing the data transmission rate.

With reference to the first aspect, in another embodiment of the first aspect, after the terminal device sends the measurement report to the access network device, the method further includes: the terminal device receives a third reference signal from the access network device, The beam corresponding to the third reference signal is provided by the first station, and the beam corresponding to the third reference signal is used for data transmission, where the beam corresponding to the third reference signal sent by the first station to the terminal device The gain of is higher than the gain of the beam corresponding to the first reference signal sent by the first station to the terminal device, and the gain of the beam corresponding to the third reference signal sent by the first station to the terminal device is higher than the gain of the beam corresponding to the second station to the terminal The gain of the beam corresponding to the second reference signal sent by the device.

After the terminal device reports the identifier of the reference signal used for beam scanning with a higher RSRP, the station corresponding to the reference signal sends a third reference signal (ie, data signal) to the terminal device, where the beam corresponding to the third reference signal The gain of is higher than the gain of the beam corresponding to the first reference signal and the second reference signal measured by the terminal device, which is beneficial to data transmission.

With reference to the first aspect, in another embodiment of the first aspect, the terminal device measuring a reference signal from an access network device to obtain a measurement result of the reference signal includes:

The terminal device measures at least two reference signals from the access network device to obtain measurement results of the at least two reference signals, and the beams corresponding to the at least two reference signals are used for beam scanning, wherein the at least two reference signals are used for beam scanning. The two reference signals include the fourth reference signal;

The terminal device sends the measurement report when a trigger condition is met, the measurement report includes the identifier of the fourth reference signal, where the trigger condition is as follows:

The adjusted value of the RSRP of the fourth reference signal is higher than the RSRP of the other reference signal among the at least two reference signals or the adjusted value of the RSRP of the other reference signal.

With reference to the first aspect, in another embodiment of the first aspect, after the terminal device sends the measurement report when the trigger condition is met, the method further includes: the terminal device uses the beam corresponding to the fourth reference signal as The serving beam, wherein the beam corresponding to the fourth reference signal is provided by an access network device, and the measurement report of at least two terminal devices received by the access network device includes the identification of the fourth reference signal, so The beam corresponding to the fourth reference signal is used as the serving beam of the at least two terminal devices.

The beam spreading factor configured by the access network device is related to the cell capacity. The terminal device adjusts the RSRP of the measured reference signal according to the beam spreading factor, and selects the reference signal according to the adjusted value to report the measurement report to the access network device. The access network device can provide a service beam capable of maximizing cell capacity according to the measurement report reported by multiple terminal devices based on the beam spreading factor.

With reference to the first aspect, in another embodiment of the first aspect, the measurement result is RSRP, and the terminal device sends a measurement report to the access network device, including the measurement result of the terminal device according to the reference signal and the beam spreading factor , When the condition for event triggering is met, the measurement report is sent to the access network device, where the condition for event triggering includes one or more of the following:

The RSRP adjustment value of the reference signal is higher than a threshold value, and the RSRP adjustment value of the reference signal is obtained by adjusting the RSRP of the reference signal by using the beam spreading factor corresponding to the reference signal; or,

The reference signal includes a first reference signal from a first station and a second reference signal from other stations. The RSRP adjustment value of the first reference signal is higher than the RSRP adjustment value of the second reference signal. The RSRP adjustment value of a reference signal is obtained by adjusting the RSRP of the first reference signal by using the first beam spreading factor corresponding to the first reference signal, and the RSRP adjustment value of the second reference signal is corresponding to the second reference signal The second beam spreading factor adjustment is obtained by adjusting the RSRP of the second reference signal.

With reference to the first aspect, in another embodiment of the first aspect, the beam spreading factor is determined according to the following parameters: the number of antenna elements activated when the access network device sends the reference signal corresponding to the beam used for beam scanning and The ratio or difference of the number of antenna elements activated when the access network device sends the reference signal corresponding to the beam used for data transmission; or; the number of radio frequency channels when the access network device sends the reference signal corresponding to the beam used for beam scanning The ratio or difference of the number of radio frequency channels activated when the access network device sends the reference signal corresponding to the beam used for data transmission; or, the transmission power and the access power when the access network device sends the reference signal corresponding to the beam used for beam scanning The ratio or difference of the transmit power when the network access device transmits the reference signal corresponding to the beam used for data transmission.

In the second aspect, the present application provides a method for selecting beams. The method includes: an access network device receives a measurement report from a terminal device, the measurement report contains one or more reference signal identifiers, where the measurement report is the terminal device Obtained according to the measurement result obtained by measuring the reference signal from the access network device and the beam spreading factor, the beam spreading factor is used to adjust the measurement result of the reference signal; the access network device provides the terminal device with the method according to the measurement report The service beam for data transmission.

The network side configures a beam spreading factor for the terminal device to notify the terminal device that it can provide a beam with a higher beam gain for data transmission on the basis of providing a beam for beam scanning. The terminal device adjusts the measurement result of the reference signal corresponding to the beam used for beam scanning according to the beam spreading factor, and selects the reference signal to report according to the adjusted value of the measurement result, which can assist the terminal device in selecting a site that can provide a higher data transmission rate. Conducive to data transmission.

With reference to the second aspect, in an embodiment of the second aspect, before the access network device receives the measurement report from the terminal device, the method further includes: the access network device sends configuration information to the terminal device, and the configuration information includes the Information about the beam spreading factor.

With reference to the second aspect, in another embodiment of the second aspect, the configuration information includes spreading factor information, including: the configuration information includes one or more beam spreading factors, and each beam spreading factor corresponds to a reference signal, where each A beam spreading factor is used to adjust the measurement result of the corresponding reference signal; or,

With reference to the second aspect, in another embodiment of the second aspect, the measurement report further includes an adjustment value of the measurement result of the reference signal corresponding to each reference signal identifier, wherein the adjustment of the measurement result of the reference signal The value is obtained by adjusting the measurement result of the reference signal according to the beam spreading factor corresponding to the reference signal.

With reference to the second aspect, in another embodiment of the second aspect, before the access network device receives the measurement report from the terminal device, the method further includes: the access network device receives capability information from the terminal device. It is used to indicate whether the terminal device supports selecting a reference signal based on the beam spreading factor.

With reference to the second aspect, in another embodiment of the second aspect, before the access network device receives the measurement report from the terminal device, the method further includes: the access network device sends at least two reference signals, and the at least two reference signals are sent by the access network device. The reference signals include the access network device sending the first reference signal through the first station and sending the second reference signal through the second station, wherein the respective beams corresponding to the at least two reference signals are used for beam scanning; The network equipment receiving the measurement report from the terminal equipment includes: the access network equipment receives the measurement report from the terminal equipment, the measurement report includes the identification of the first reference signal; the access network equipment is the terminal according to the measurement report The device provides a service beam for data transmission, including: the access network device sends a third reference signal to the terminal device through the first station according to the identification of the first reference signal contained in the measurement report, wherein, The beam corresponding to the third reference signal is used as the service beam of the terminal device for data transmission.

With reference to the second aspect, in another embodiment of the second aspect, before the access network device receives the measurement report from the terminal device, the method further includes: the access network device sends at least two reference signals, and the at least two reference signals are sent by the access network device. The beams corresponding to each of the two reference signals are used for beam scanning, where the at least two reference signals include the fourth reference signal; the access network device receives the measurement report from the terminal device, including: the access network device receives the measurement report from the terminal device Measurement reports of at least two terminal devices, where the measurement reports of the at least two terminal devices each include the identification of the fourth reference signal; the access network device provides the transmission beam corresponding to the fourth reference signal as the at least two terminals The service beam of the device, and silence other transmit beams.

In some embodiments of the first aspect or the second aspect, the beam spreading factor is determined according to the following parameters:

The ratio or difference between the number of antenna elements activated when the access network device sends the reference signal corresponding to the beam used for beam scanning and the number of antenna elements activated when the access network device sends the reference signal corresponding to the beam used for data transmission; or ；

The ratio or difference between the number of radio frequency channels when the access network device sends the reference signal corresponding to the beam used for beam scanning and the number of radio frequency channels activated when the access network device sends the reference signal corresponding to the beam used for data transmission; or,

The ratio or difference of the transmission power when the access network device sends the reference signal corresponding to the beam used for beam scanning and the transmission power when the access network device sends the reference signal corresponding to the beam used for data transmission.

The technical effects of the various technical solutions on the network side can be referred to the description of the corresponding solutions on the terminal side, which will not be repeated here.

In a third aspect, the present application provides a method for selecting a beam. The method includes: a terminal device receives configuration information from an access network device, the configuration information includes information about one or more beam spreading factors of the first type of reference signals, The beam corresponding to the first type of reference signal is used for beam scanning;

The terminal device measures M first-type reference signals from the access network device, and obtains the measurement results of the M first-type reference signals, where M≥1, and M is an integer;

The terminal device sends a measurement report, and the measurement report contains N reference signal identifiers, and the N reference signal identifiers are used to identify N first-type reference signals respectively, and the N first-type reference signals are based on the beam spreading factor. And the measurement results of the M first-type reference signals, selected from the M first-type reference signals, where the N first-type reference signals belong to the M first-type reference signals Signal, N≥1, N≤M, N is an integer.

With reference to the third aspect, in some implementations of the third aspect, after the terminal device sends the measurement report, the method further includes: the terminal device receives the second type of reference signal from the access network device, where the second type of reference The beam corresponding to the signal is used for data transmission.

With reference to the third aspect, in some implementations of the third aspect, the method further includes: the terminal device sends capability information to the access network device, and the capability information is used to instruct the terminal device to support the selection of the first type of reference signal based on the beam spreading factor .

With reference to the third aspect, in some implementations of the third aspect, the configuration information includes spreading factor information, including: the configuration information includes one or more beam spreading factors, and each beam spreading factor corresponds to a first type reference signal, Wherein, each beam spreading factor is used to adjust the corresponding measurement result of the first type of reference signal; or,

The configuration information includes one or more beam spreading factors, each beam spreading factor corresponds to a first type reference signal set, and each beam spreading factor is used to adjust any first type reference signal in the corresponding first type reference signal set Measurement results.

With reference to the third aspect, in some implementations of the third aspect, the terminal device sends a measurement report to the access network device, including: the terminal device sends a measurement report to the access network device when the event trigger condition is met, Wherein, the conditions for triggering the event include one or more of the following:

The RSRP adjustment value of one or more of the M first type reference signals is higher than the threshold value, and the RSRP adjustment value of the first type reference signal is corresponding to the first type reference signal The beam spreading factor is obtained by adjusting the RSRP of the first type of reference signal; or,

The M first-type reference signals include the first-type reference signals from the first site and the first-type reference signals from other sites, and the first of the first-type reference signals from the first site The RSRP adjustment value of the reference signal is higher than the RSRP adjustment value of the second reference signal in the first type reference signal from the second site, wherein the RSRP adjustment value of the first reference signal is adopted The first beam spreading factor corresponding to the first reference signal is obtained by adjusting the RSRP of the first reference signal, and the adjustment value of the RSRP of the second reference signal is obtained by using the second reference signal corresponding to the second reference signal. The beam spreading factor adjustment is obtained by adjusting the RSRP of the second reference signal.

With reference to the third aspect, in some implementation manners of the third aspect, the measurement report further includes an adjustment value of each measurement result of the N first-type reference signals, and each of the N first-type reference signals The adjustment value of the measurement result of the first type reference signal is obtained by adjusting the measurement result of the first type reference signal according to the corresponding beam spreading factor.

With reference to the third aspect, in some implementation manners of the third aspect, the beam spreading factor is determined according to the following parameters:

The ratio or difference between the number of antenna elements activated when the access network device sends the first type reference signal and the number of antenna elements activated when the access network device sends the second type reference signal; or;

The ratio or difference between the number of radio frequency channels when the access network device sends the first type of reference signal and the number of radio frequency channels activated when the access network device sends the second type of reference signal; or,

The ratio or difference of the transmission power when the access network device sends the first type of reference signal and the transmission power when the access network device sends the second type of reference signal.

In a fourth aspect, the present application provides a method for accessing a network based on beam selection, including: a terminal device measures a broadcast signal from an access network device, and the broadcast signal carries configuration information of a beam spreading factor of a reference signal, wherein, The beam spreading factor of the reference signal is used to adjust the measurement result of the reference signal;

The terminal device measures at least two reference signals from the access network device to obtain measurement results of the at least two reference signals;

The terminal device selects a first random access channel RACH resource to access the access network device, wherein the first RACH resource is associated with a beam corresponding to a first reference signal of the at least two reference signals, and The adjustment value of the measurement result of the first reference signal is higher than the measurement result of the other reference signals in the at least two reference signals or the adjustment value of the measurement result, wherein the adjustment value of the measurement result of each reference signal is based on the The beam spread factor corresponding to the reference signal is obtained by adjusting the measurement result of the reference signal.

The terminal device adjusts the measurement results of each measured reference signal according to the beam spreading factor, selects a beam according to the adjustment value, and then uses the RACH resource corresponding to the selected beam to access the network. Since the performance of the beam selected based on the adjustment value is higher, the probability of successful random access can be increased, and the quality of random access can be improved.

In a fifth aspect, a communication device is provided. The communication device has the function of implementing the method in the first aspect or any of its possible implementations, or the communication device has the ability to implement the third aspect or any of its possible implementations For the function of the method in the method, the communication device has the function of implementing the method in the fourth aspect or any possible implementation manner thereof, and the function may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above-mentioned functions.

In a sixth aspect, a communication device is provided. The communication device has the function of implementing the method in the second aspect or any of its possible implementations. The function can be implemented by hardware or by hardware executing corresponding software. . The hardware or software includes one or more units corresponding to the above-mentioned functions.

In a seventh aspect, the present application provides a terminal device, including a processor, a memory, and a transceiver. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and control the transceiver to send and receive signals, so that the terminal device can execute the method in the first aspect or any of its possible implementation modes, or , So that the terminal device executes the method in the third aspect or any possible implementation manner thereof, so that the terminal device executes the method in the fourth aspect or any possible implementation manner thereof.

In an eighth aspect, the present application provides a network device, including a processor, a memory, and a transceiver. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, and control the transceiver to send and receive signals, so that the network device executes the method in the second aspect or any possible implementation manner thereof.

In a ninth aspect, this application provides a computer-readable storage medium in which computer instructions are stored, and when the computer instructions are run on a computer, the first aspect or any possible implementation thereof The method in the manner is executed, or the method in the third aspect or any possible implementation manner thereof is executed, or the method in the fourth aspect or any possible implementation manner thereof is executed.

In a tenth aspect, the present application provides a computer-readable storage medium having computer instructions stored in the computer-readable storage medium. When the computer instructions are executed on a computer, the second aspect or any possible implementation thereof The method in the mode is executed.

In an eleventh aspect, the present application provides a computer program product. The computer program product includes computer program code. When the computer program code runs on a computer, the computer program code is The method is executed, or the method in the third aspect or any possible implementation manner thereof is executed, or the method in the third aspect or any possible implementation manner thereof is executed.

In the twelfth aspect, the present application provides a computer program product, the computer program product includes computer program code, when the computer program code is run on a computer, the second aspect or any of its possible implementation manners The method is executed.

In a thirteenth aspect, the present application provides a chip including a processor and a communication interface, the communication interface is used to receive a signal and transmit the signal to the processor, and the processor processes the signal so that As the method in the first aspect or any of its possible implementations is executed, or causes the method in the third aspect or any of its possible implementations to be executed, or causes as the fourth aspect or any of its possible implementations The method in the mode is executed.

Optionally, the communication interface may be an interface circuit.

In a fourteenth aspect, the application provides a chip, and the application provides a chip, including a processor and a communication interface, the communication interface is used to receive a signal and transmit the signal to the processor, the processor The signal is processed so that the method in the second aspect or any of its possible implementations is executed.

Optionally, the communication interface may be an interface circuit.

In a fifteenth aspect, the present application provides a wireless communication system, including the terminal device described in the fifth aspect and the network device described in the sixth aspect.

Description of the drawings

Fig. 1 is an architecture of a communication system suitable for an embodiment of the present application.

Fig. 2 shows a schematic diagram of a transmission beam of a station with precise alignment capability.

Fig. 3 shows a schematic diagram of a transmission beam of a station that does not have precise alignment capabilities.

Fig. 4 is a schematic flowchart of a method for selecting a beam provided by this application.

Fig. 5 is a schematic diagram of a scenario in which a UE performs site handover or beam handover.

Fig. 6 is a schematic diagram of transmitting beams in a multi-user pairing scenario.

FIG. 7 is an example of the method for selecting beams provided by this application.

FIG. 8 is another schematic flowchart of the method for selecting beams provided by this application.

Fig. 9 is another example of the beam selection method provided by this application.

FIG. 10 is a schematic block diagram of a communication device provided by this application.

FIG. 11 is a schematic block diagram of a communication device provided by this application.

FIG. 12 is a schematic structural diagram of the communication device 10 provided by this application.

FIG. 13 is a schematic structural diagram of the communication device 20 provided by the present application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a long term evolution (LTE) system, a fifth generation (5G) system, or a communication system after 5G.

The terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device. The terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in a 5G network or terminal devices in other communication systems, etc. This application is not limited to this.

The wireless access network device in the embodiment of the present application may be any device with a wireless transceiver function. The access network equipment includes but is not limited to: evolved Node B (eNB), radio network controller (RNC), node B (Node B, NB), base station controller (base station) controller, BSC), base transceiver station (BTS), home base station (home evolved NodeB, or home Node B, HNB), baseband unit (BBU), access point (access point, AP), A wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc., can also be a gNB or transmission point in a 5G system, or can also be a gNB Or a network node of a transmission point, for example, a building baseband unit (BBU) or a distributed unit (DU), etc.

In addition, the following briefly introduces some terms or technologies involved in the embodiments of the present application.

1. Beam.

The embodiment of the beam in the NR protocol can be a spatial domain filter, or a spatial filter or a spatial parameter. The beam used to transmit a signal can be called a transmission beam (Tx beam), can be called a spatial domain transmission filter or a spatial transmission parameter (spatial transmission parameter); the beam used to receive a signal can be called To receive the beam (reception beam, Rx beam), it can be called a spatial domain receive filter or a spatial receive parameter (spatial RX parameter).

The transmitting beam may refer to the distribution of signal strength in different directions in space after a signal is transmitted through the antenna, and the receiving beam may refer to the signal strength distribution of the wireless signal received from the antenna in different directions in space.

In addition, the beam may be a wide beam, or a narrow beam, or other types of beams. The beam forming technology may be beamforming technology or other technologies. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital/analog beamforming technology, etc.

The beam generally corresponds to the resource. For example, when performing beam measurement, the network device sends different resources through different beams, and the terminal feeds back the measured resource quality, and the network device can learn the quality of the corresponding beam.

During data transmission, the beam information is also indicated by its corresponding resource. For example, the network device instructs the terminal to receive PDSCH (physical downlink shared channel, physical downlink shared channel) beam information through a transmission configuration indication (Transmission Configuration Indication, TCI) field in downlink control information (downlink control information, DCI).

Optionally, multiple beams having the same or similar communication characteristics are regarded as one beam. A beam can be sent through one or more antenna ports to transmit data channels, control channels, and sounding signals. One or more antenna ports forming a beam can also be regarded as an antenna port set.

In beam measurement, each beam of the network device corresponds to a resource, so the resource index or identifier can be used to indicate the beam corresponding to the resource.

2. Resources.

In beam measurement, the resource index can be used to uniquely identify the beam corresponding to the resource. The resource can be an uplink signal resource or a downlink signal resource. Uplink signals include but are not limited to sounding reference signal (SRS) and demodulation reference signal (DMRS).

The downlink signal includes but is not limited to: channel state information reference signal (CSI-RS), cell specific reference signal (CS-RS), UE specific reference signal (user equipment specific reference) signal, US-RS), demodulation reference signal (demodulation reference signal, DMRS), and synchronization signal/physical broadcast channel block (synchronization system/physical broadcast channel block, SS/PBCH block). Among them, the SS/PBCH block may be referred to as a synchronization signal block (synchronization signal block, SSB) for short.

Resources are configured through radio resource control (radio resource control, RRC) signaling. In terms of configuration structure, a resource is a data structure, including its corresponding uplink/downlink signal related parameters, such as the type of uplink/downlink signal, the resource element that carries the uplink/downlink signal, the transmission time and period of the uplink/downlink signal , The number of ports used to send uplink/downlink signals, etc. Each uplink/downlink signal resource has a unique index to identify the downlink signal resource. It is understandable that the index of the resource may also be referred to as the identifier of the resource, which is not limited in the embodiment of the present application.

3. TCI state:

As an example, the TCI status mainly includes the quasi-co-location (QCL) type (for example, two different QCL types can be configured) and the reference signal of each QCL type, and the reference signal specifically includes the reference signal The carrier component (CC) identification (ID) or bandwidth part identifier (BWP ID) where it is located, and the number of each reference signal resource (ssb-index, or CSI-RS resource index).

The configuration method of TCI status in the existing protocol is as follows:

Among them, the division of QCL types can be as follows:

QCL typeA: delay, Doppler shift, delay spread, Doppler spread;

QCL typeB: Doppler shift, Doppler extension;

QCL typeC: delay, Doppler shift;

QCL typeD: Spatial receiving parameter, that is, receiving beam.

4. Quasi-co-location (QCL).

The co-location relationship is used to indicate that multiple resources have one or more identical or similar communication features. For multiple resources with a co-location relationship, the same or similar communication configuration can be adopted. For example, if two antenna ports have a co-location relationship, then the large-scale characteristics of the channel transmitting one symbol on one port can be inferred from the large-scale characteristics of the channel transmitting one symbol on the other port. Large-scale characteristics can include: delay spread, average delay, Doppler spread, Doppler shift, average gain, receiving parameters, terminal receiving beam number, transmitting/receiving channel correlation, receiving angle of arrival, receiver antenna space Correlation, main angle of arrival (angel-of-arrival, AoA), average angle of arrival, expansion of AoA, etc. The parameters of quasi co-location include at least one of Doppler spread, Doppler frequency shift, average delay, delay spread and spatial reception parameters. QCL relations can be divided into four categories: QCL-TypeA: {Doppler frequency shift, Doppler spread, average delay, time delay spread}; QCL-TypeB: {Doppler frequency shift, Doppler spread}; QCL-TypeC: {Doppler frequency shift, average delay}; QCL-TypeD: {spatial domain receiving parameters}.

5. Spatial relation (SR).

SR can also be called uplink TCI (uplink TCI, UL TCI). Similar to the TCI introduced above, the spatial relationship can be used to determine the transmission beam of the uplink signal. The spatial relationship can be determined by beam training. The reference signal used for beam training may be, for example, an uplink reference signal, such as a sounding reference signal (SRS), or a downlink reference signal, such as the SSB or CSI-RS listed above.

Each spatial relationship may include the index of the serving cell (ServCellIndex) and the reference signal resource identifier. The reference signal resource identifier can be, for example, any of the following: downlink BWP ID (downlink BWP ID) and SSB index (SSB-Index), downlink BWP ID and non-zero power CSI-RS reference signal resource identifier (non-zero power-channel) state information-resource identifier, NZP-CSI-RS-ResourceId), or uplink BWP ID and SRS resource identifier (SRS-ResourceId).

Among them, the index of the serving cell, the BWP ID, and the reference signal resource identifier refer to the reference signal resource used in the beam training process and the corresponding serving cell and BWP. A spatial relationship is used to determine a transmission beam, that is, an index of a serving cell, a BWP ID, and a reference signal resource can be used to determine a transmission beam. The terminal device can maintain the index, BWP ID, and reference signal resource identifier of the serving cell in the beam training process and the corresponding relationship between the reference signal resource identifier and the transmitted beam, and the network device can maintain the index, BWP ID, and reference signal resource of the serving cell during the beam training process The corresponding relationship between the identifier and the receiving beam. Through the reference signal resource identifier, the pairing relationship between the transmitting beam and the receiving beam can be established.

In the subsequent communication process, the terminal device may determine the transmitting beam based on the spatial relationship indicated by the network device, and the network device may determine the receiving beam based on the same spatial relationship.

In addition, each spatial relationship may also include power control information. The power control information may include, for example, at least one of the following: expected received power, path loss reference signal, and path loss compensation parameter α. The terminal device can determine what transmission power to use to transmit the uplink signal based on the power control information.

In addition, the spatial relationship can be globally configured. In the spatial relationships configured for different cells and different BWPs, if the identifiers of the spatial relationships are the same, the configurations of the corresponding spatial relationships are also the same.

6. Spatial relation indicator (SRI).

SRI can be used to indicate spatial relationships.

In an implementation manner, the network device can configure a spatial relationship list for the terminal device through high-level signaling (for example, an RRC message), and the spatial relationship list may include multiple spatial relationships. For example, the network device may configure a spatial relationship for each cell. BWP configures up to 64 spatial relations.

After that, the network device can activate one or more spatial relationships through high-level signaling (such as MAC CE). The activated spatial relationship is a subset of the spatial relationship list configured in the foregoing RRC message. For example, the network device can activate up to 8 TCI states for each BWP in each cell. The specific method for the network device to activate the spatial relationship through the MAC CE is the same as the specific method for activating the TCI state. The specific method for activating the TCI state by the MAC CE has been described in detail above. For the sake of brevity, it will not be repeated here. Based on the activation of the MAC CE, the terminal device can determine the mapping relationship between at least one SRI and at least one spatial relationship. The specific form of the mapping relationship may be similar to that shown in Table 1 above, for the sake of brevity, it is not described as an example here.

Thereafter, the network device can indicate a selected spatial relationship through the SRI field in the physical layer signaling (such as DCI). The DCI may be, for example, a DCI used to schedule uplink grant resources (uplink grant, UL grant). The terminal device may determine the selected spatial relationship based on the above-mentioned mapping relationship between the at least one SRI and the at least one spatial relationship and the received SRI.

Similar to the downlink TCI, the configuration information of a spatial relationship may include the identification of one or two reference signal resources and the associated QCL type. When the QCL relationship is configured as one of type A, or B, or C, the terminal device can demodulate the PDCCH or PDSCH according to the indication of the TCI state. When the QCL relationship is configured as Type D, the terminal device can know which receiving beam is used by the network device to receive the signal, and can then determine which transmitting beam is used to send the signal according to the beam pairing relationship determined by the channel measurement described above.

In addition, the configuration information of a spatial relationship may include the identification of one or two reference signal resources and the associated spatial filter. For example, when an SSB index is configured in a spatial relationship, the terminal device may transmit the signal through the spatial filter corresponding to the SSB index. Wherein, the spatial filter corresponding to the SSB index may be a spatial filter for receiving the SSB identified by the SSB index in the beam training process.

The terminal device may determine the transmission beam for transmitting the physical uplink shared channel (PUSCH) according to the SRI field in the DCI on the PDCCH.

7. Downlink beam training and uplink beam training.

Downlink beam training is mainly achieved through measurement and feedback of downlink signals. It can be considered that the base station uses different transmit beams to transmit different numbers of SSB and/or CSI-RS, where the numbers of the transmit beam and SSB or CSI-RS can be The one-to-one relationship can also be a one-to-many, many-to-one, or many-to-many relationship. The base station configures the terminal to perform L1 layer reference signal receiving power (reference signal receiving power, L1 layer reference signal receiving power) measurement or L1 layer signal to interference plus noise for a specific one or more SSBs or CSI-RSs ratio, L1-SINR) measurement, and the terminal is required to select N appropriate SSB or CSI-RS by itself, and report the identification and quality of the corresponding number. If the downlink signal is periodic or semi-continuous, the terminal has multiple opportunities during measurement and can try different receiving beams. If the downlink signal is aperiodic, for example, one-off, the terminal can perform measurement according to the receiving beam indicated by the base station, or it can select the receiving beam by itself.

The uplink beam training is mainly realized by configuring the terminal to send the uplink measurement signal (for example, SRS) by the base station. It can be considered that the terminal uses different transmission beams to transmit SRSs with different numbers, where the relationship between the transmission beams and the SRS numbers can be one-to-one, one-to-many, many-to-one, or many-to-many. The base station selects a suitable transmission beam for the terminal by measuring the quality of different SRS. When measuring, the base station can try different receiving beams. If the uplink signal is periodic or semi-continuous, the base station has multiple opportunities during measurement, so that it can try different receiving beams. If the uplink signal is aperiodic, the base station can also select the receiving beam by itself.

8. Road loss estimation.

In cellular network communication, the parameters used to determine the uplink transmission power of the terminal equipment are configured by the network equipment. The purpose of uplink power control is to make the power of the signal sent by the terminal device reach the network device to meet the receiving condition of the network device. For example, the network device requires the power of the signal sent by the terminal device to reach the network device as P0. Since the distance between each terminal device and the network device is different, the terminal device needs to estimate the path loss (pathloss, PL) in signal transmission to adjust the uplink transmission power. Among them, the path loss is abbreviated as "path loss", and the estimation of path loss is abbreviated as "path loss estimation".

Path loss estimation is usually realized by measuring the received power of a path loss reference signal (pathloss reference signal, PL RS) configured by a network device by a terminal device. To put it simply, path loss estimate = PL RS transmit power-PL RS received power, and the uplink transmit power of the terminal device = P0 + path loss estimate. Among them, the transmit power and P0 of the network device are configured by the network device.

9. Pathloss reference signal (PL RS).

The path loss reference signal may also be referred to as a path loss estimation reference signal. The terminal device can adjust the transmission power based on the path loss estimation value obtained above. In order to obtain the estimated path loss, the network equipment needs to be configured with PL RS so that the terminal equipment can track. Tracking includes periodic measurement and maintenance of the path loss measurement results corresponding to each PL RS. It should be understood that PL RS is a periodic reference signal, and PL RS is a general term for reference signals used for path loss estimation. The reference signal used for path loss estimation may be, for example, a synchronization signal block (SS/PBCH block, SSB) or channel status information reference signal (channel status information reference signal, CSI-RS). In other words, this article refers to the reference signal configured by the network device for the terminal device and used for path loss estimation as PL RS.

10. Cell.

The cell is described by the high-level from the perspective of resource management or mobility management or service unit. The coverage of each network device can be divided into one or more serving cells, and the serving cells can be regarded as composed of certain frequency domain resources. In the embodiment of the present application, the cell can be replaced with a serving cell or CC. In the embodiments of this application, "cell", "serving cell" and "CC" are used interchangeably. When the difference is not emphasized, the meanings to be expressed are the same. Similarly, "serving cell index", "serving cell ID", "cell ID" and "CC ID" are used interchangeably. When the difference is not emphasized, what they want to express The meaning is the same.

The technical solution of this application is introduced below.

Refer to FIG. 1, which is an architecture of a communication system applicable to an embodiment of the present application. As shown in FIG. 1, the wireless communication system 100 may include at least one network device 101, and the network device 101 may perform wireless communication with one or more terminal devices (for example, the terminal device 102 and the terminal device 103 shown in FIG. 1). .

Taking the communication between the terminal device 102 and the network device 101 as an example, the terminal device 102 and the network device 101 can obtain one or more beam pairs with better communication through the beam management process, and the beam pairs can be expressed as (Bx, B 'x) and (By, B'y). Among them, Bx represents the transmitting beam of the network device 101, B'x represents the receiving beam of the terminal device 102, By represents the transmitting beam of the terminal device 102, and B'y represents the receiving beam of the network device 101. As shown in Figure 1, the transmission beam #1 of the network device 101 and the reception beam #0 of the terminal device are a beam pair, and the transmission beam #2 of the network device and the reception beam #2 of the terminal device are a beam pair. The transmitting beam #0 of the terminal device and the receiving beam #1 of the network device are a beam pair, and the transmitting beam #1 of the terminal device and the receiving beam #2 of the network device are a beam pair.

Only when the beams of the terminal device 102 and the network device 101 are aligned can normal communication be carried out. Since the terminal device 102 and the network device 101 can each face multiple beam directions, the premise of communication is to achieve beam alignment through beam training. For example, in downlink communication, through downlink beam training, the transmitting beam of the network device and the receiving beam of the terminal device are aligned.

The technical solution provided in this application can be applied to a scenario where a terminal device selects a reference signal (that is, a beam).

The technical solution of this application is introduced below.

To facilitate understanding, first introduce related concepts or technologies involved in the embodiments of the present application.

In a wireless communication system, an access network device is a logical concept, and an access network device may include multiple sites in a physical entity. Different sites have different beamforming algorithms and implementations. According to the type of transmitting beam, the sites can be roughly divided into two categories.

The beam used for beam scanning and the beam used for data transmission sent by a type of site are different. Such sites usually have high capabilities and are generally considered to have precise alignment capabilities, as shown in Figure 2.

Refer to FIG. 2, which shows a schematic diagram of a transmission beam of a station with precise alignment capability. The first type of beam sent by the site is the beam used for beam scanning. These beams are visible to all UEs served by the site, that is, they are considered as public beams. Generally, the public beam may be faster and the beam gain is small. After a specific UE performs beam selection by measuring the quality of one or more public beams, and reports the selected result to the access network device, the access network device may be The specific UE provides a narrower dedicated beam with a higher beam gain for subsequent data transmission, and this narrower dedicated beam with a higher beam gain is the second type of beam as shown in FIG. 3. The access network equipment provides the second type of beam with higher beam gain for the UE for data transmission, which can increase the data transmission rate. The specific implementation of this process may be achieved through an algorithm of the access network device. For example, the access network device may perform interpolation according to the beam information or beam quality information reported by the UE.

The beam used for beam scanning sent by another type of site is the same as the beam used for data transmission. It is simpler for this type of site to provide a beam for the UE. Generally, the site directly uses the beam reported by the UE for data transmission. Such a site is considered to have no precise alignment capability, as shown in Figure 3.

Referring to FIG. 3, FIG. 3 shows a schematic diagram of a transmitting beam of a station that does not have the ability to accurately align. As shown in Figure 3, this type of site only transmits one type of beam.

Considering that different sites send beams differently, the technical solution of this application proposes that for sites with precise alignment capabilities, that is, the beams used for beam scanning and the beams used for data transmission have different analog beamforming. The station can notify the terminal equipment of its ability to provide higher gain beams, so that the terminal equipment considers this factor when selecting the service beam. Even if the quality of some beams obtained by the terminal equipment measurement is poor, the station can be selected. Conducive to subsequent data transmission.

For the convenience of description, the reference signal corresponding to the beam used for beam scanning of each site is referred to as the first type reference signal, and the reference signal corresponding to the beam used for data transmission is referred to as the second type reference signal. In other words, the beams used by each site to send the first-type reference signal belong to beams used for beam scanning, and the beams used by each site to send the second-type reference signal belong to the beams used for data transmission.

Refer to FIG. 4, which is a schematic flowchart of a method for selecting a beam provided by this application. The method 200 mainly includes steps 210, 220, and 230. Optionally, 240 and/or 250 may also be included.

210. The terminal device measures one or more first-type reference signals from the access network device, and obtains a measurement result of the one or more first-type reference signals.

In some examples, the measurement results of the first type of reference signal may be reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), signal to interference ratio (signal to interference and noise ratio, SINR), etc.

As mentioned above, the access network device is a logical concept, and an access network device may include multiple sites in a physical entity. Therefore, the one or more first-type reference signals from the access network device may come from one site, or may also come from multiple sites, which is not limited. The terminal equipment does not distinguish which site the measured first-type reference signals come from, but thinks that they all come from the access network equipment.

As some examples, the first type of reference signal in the embodiment of the present application may be any one of a synchronization signal, a broadcast channel reference signal, and a synchronization signal block (synchronization signal block, SSB); or,

The first type of reference signal can refer to the channel state information reference signal (CSI-RS) used for beam management (for beam management), and the CSI used for L1 layer reference signal received power (L1-RSRP) measurement -RS, one of CSI-RS used for L1 layer signal-to-interference and noise ratio (L1-SINR) measurement, and CSI-RS used for mobility measurement (ie, CSI-RS for mobility).

The reference signals of the first type in the embodiments of the present application are distinguished from the reference signals of the second type appearing below. The second type of reference signal will be introduced below.

220. The terminal device sends a measurement report, and the measurement report includes one or more reference signal identifiers.

As an example, in each embodiment of the present application, the terminal device selects the first type of reference signal to be reported from the measured first type of reference signal based on the selection principle of “selecting the first type of reference signal with the largest adjustment value of RSRP to report” A type of reference signal.

In addition, the terminal equipment can also be based on other selection principles, which is not limited in this article. For example, the terminal device selects according to the SINR of the first type of reference signal, or selects according to the correlation of the beam corresponding to the first type of reference signal, or selects according to the channel capacity of the beam corresponding to the first type of reference signal, and so on.

Wherein, each reference signal identifier in the one or more reference signal identifiers corresponds to a first-type reference signal, and the first-type reference signals corresponding to the one or more reference identifiers are all measured by the terminal equipment. The first type of reference signal.

In addition, the first-type reference signal corresponding to the one or more reference signal identifiers is based on the measurement result of the one or more first-type reference signals and the one or more first-type reference signals respectively correspond to The beam spreading factor is determined. The beam spreading factor corresponding to each first-type reference signal is used to adjust the measurement result of the first-type reference signal.

Optionally, in some examples, the measurement report further includes an adjustment value of the measurement result of the first type reference signal corresponding to each of the one or more reference signal identifiers. Wherein, the adjustment value of the measurement result of each first-type reference signal is obtained by adjusting the measurement result of the first-type reference signal by using the beam spreading factor corresponding to the first-type reference signal.

Based on the above-mentioned selection principle of "select the first type of reference signal report with the largest adjustment value of RSRP", it can be seen that the first type of reference signal corresponding to one or more reference signal identifiers carried in the measurement report is the adjustment of the terminal equipment based on RSRP The value is selected from the measured first-type reference signals. For example, the terminal device selects one or several first-type reference signals with the largest RSRP adjustment, which can be specifically configured by the network side.

As some examples, the terminal device can use uplink resources or channels such as uplink control channels, uplink data channels, or uplink shared channels, or display through RRC signaling, MAC-CE messages, or uplink control information (UCI). The adjustment value of the measurement result of the beam selected according to the beam spreading factor and/or the first type of reference signal is sent in a method of formula.

Optionally, the terminal device can also use the random access channel (RACH), uplink sounding signal, uplink demodulation reference signal and other implicit methods to send the beam selected according to the beam spreading factor and/or the first type of reference The adjusted value of the measurement result of the signal.

In the embodiment of the present application, the beam spreading factor is used to adjust the measurement result of the reference signal (specifically, the first type of reference signal).

Optionally, the beam spreading factor may be beam level, reference signal resource level, reference signal resource set level, carrier level, or cell level.

Among them, the beam spreading factor at the beam level or the reference signal resource level indicates that within the coverage of a transmission beam, the access network device is capable of providing a service beam with a better beam gain.

In an example, each reference signal resource is configured with a beam spreading factor, as shown in Table 1.

Table 1

参考信号资源标识Reference signal resource identification	波束扩展因子(dB)Beam spreading factor (dB)
RS1RS1	xx
RS3RS3	yy

For example, for RS1, the corresponding beam spreading factor is x, and for RS3, the corresponding beam spreading factor is y, and the unit is decibel (dB).

For the UE, the reference signal from the access network device is measured, and after the measurement result is obtained, the beam spreading factor corresponding to the reference signal needs to be used to adjust the measurement result to obtain the adjustment value of the measurement result.

For example, after the UE measures RS1 and obtains the measurement result of RS1, the UE uses the beam spreading factor corresponding to RS1 to adjust the measurement result of RS1 to obtain the adjustment value of the measurement result of RS1, which is specifically the measurement result of RS1 + x, and the unit is Decibel milliwatt (relative to one milliwatt, dBm).

For another example, after the UE measures RS3 and obtains the measurement result of RS3, the UE uses the beam spreading factor corresponding to RS3 to adjust the measurement result of RS3 to obtain the adjustment value of the measurement result of RS3, which is specifically the measurement result of RS3 + y, the unit Is dBm.

For example, suppose that the measurement result of RS1 is -90dBm, x=3, and after the UE adjusts the measurement result using the beam spread factor x corresponding to RS1, the adjustment value of the measurement result is (-90+3)dBm, which is -87dBm. Assuming that the measurement result of RS3 is -95dBm, y=6, after the UE adjusts the measurement result using the beam spread factor y corresponding to RS3, the adjusted value of the measurement result is (-95+6)dBm, which is -89dBm.

In another example, one set of reference signal resources is configured with one beam spreading factor.

In this example, the beam spreading factor is applicable to each reference signal resource in the reference signal resource set. That is, the terminal device can use the beam spreading factor to adjust the measurement result of any reference signal in the reference signal resource set to obtain an adjustment value of the measurement result.

Optionally, in some embodiments, one carrier or one set of carriers is configured with one beam spreading factor.

Taking one carrier corresponding to one beam spreading factor as an example, the measurement results obtained by the UE measuring the reference signal on different carriers can be adjusted by the beam spreading factors corresponding to the respective carriers, so as to obtain the adjustment value of the measurement result.

For example, carrier 1 is configured with beam spreading factor 1, and carrier 2 is configured with beam spreading factor 2. The UE measures the reference signal on carrier 1, and can use beam spreading factor 1 to adjust the measurement result. The UE measures the reference signal on carrier 2, and can use beam spreading factor 2 to adjust the measurement result.

Optionally, in some examples, one cell or a set of cells is configured with one beam spreading factor.

Taking one cell corresponding to one beam spreading factor as an example, the UE measures reference signals from different cells, and the measurement result can be adjusted by using the beam spreading factor corresponding to the cell to which the reference signal belongs to obtain an adjustment value of the measurement result.

In the embodiment of the present application, the UE adjusts the measurement result of each reference signal according to the beam spreading factor corresponding to the reference signal to obtain the adjustment value of the measurement result. Further, the UE selects a beam according to the adjustment value of the measurement result, and sends a measurement report to the access network device.

The access network device receives the measurement report from the terminal device.

230. The access network device provides the terminal device with a service beam for data transmission according to the measurement report.

The access network device corresponds to the measurement report, specifically, the one or more reference signal identifiers carried in the measurement report, or the one or more reference signal identifiers and the one or more reference signal identifiers respectively. The adjusted value of the measurement result of the first type of reference signal provides the UE with a service beam for data transmission.

Alternatively, the access network device provides a service beam for data transmission provided by the terminal device, that is, the access network device provides the terminal device with a beam corresponding to the second type of reference signal.

Different from the first type of reference signal, the second type of reference signal can be any of the following signals:

Channel state information reference signal (channel state information reference signal, CSI-RS), downlink control channel demodulation reference signal (demodulation reference signal, DMRS), downlink shared channel demodulation reference signal, downlink phase noise tracking signal, tracking signal (Tracking signal) reference signal, TRS) etc.

In addition, the second type of reference signal may also refer to a downlink control channel (physical downlink control channel, PDCCH) or a physical downlink shared channel (physical downlink shared channel, PDSCH).

Considering different hardware capabilities, overhead, and power consumption, network devices can deploy different beamforming strategies. Some transmitters can support wide beams as well as narrow beams. They can use only a wide beam to perform beam scanning for multiple users in common, and then use a narrow beam to perform data transmission for a specific terminal. However, since this narrow beam is invisible to the terminal before the actual data transmission, the terminal may miss this more potential serving cell, transmission point, or beam. Therefore, the beam spreading factor can be used to inform the terminal that if the terminal chooses to attach to this serving cell, transmission point, or beam, the terminal can expect to obtain a higher gain serving beam during data transmission.

Since the measurement report reported by the UE takes into account the beam spreading factor, rather than only reporting based on the measurement results of the first type of reference signal, in some scenarios, it can prevent the UE from directly selecting the serving beam based on the measurement results of the first type of reference signal. As a result, it is impossible to select the optimal beam (for example, the beam corresponding to the second type of reference signal) that is conducive to data transmission.

The following describes some scenarios.

scene 1

Switching of sites or beams.

For a mobile terminal device, which site is selected as the service site is very important. If the terminal device selects a service site based only on measuring the quality of the beam used for beam scanning, it may happen that although the quality of the beam used for beam scanning is higher, the data transmission rate is lower. This will be described below with reference to FIG. 5.

Refer to FIG. 5, which is a schematic diagram of a scenario in which a UE performs site switching or beam switching. Fig. 5 uses RSRP=-90dBm as an exemplary boundary, showing the coverage of each beam of the site 1 and the site 2. For example, station 1 has precise alignment capabilities, the beam used by station 1 to send RS1 belongs to one of the beams used for beam scanning at station 1, and the beam used for station 1 sending RS2 belongs to the beam used for data transmission at station 1 One is a beam with precise alignment capabilities. The station 2 does not have the ability to accurately align, and the beam used by the station 2 to send RS3 belongs to the beam used by the station 2 for beam scanning, and is also the beam used by the station 2 for data transmission. In other words, station 1 can provide two types of beams, so that one UE can provide two beams with different beam gains, while station 2 can only provide one type of beam, so that only one UE can provide beams with one beam gain.

If the reference signal corresponding to the beam used for beam scanning is sent periodically, the reference signals that the UE can periodically measure are RS1 from station 1 and RS3 from station 2. According to the introduction of the stations with precise alignment capabilities above, the UE measures RS1 and RS3, and only when RS1 is selected and reported to the access network, can the access network be narrower and narrower through station 1. The beam with the higher beam gain transmits RS2 to the UE.

It can be understood that RS1 and RS3 in the example of FIG. 5 belong to the first type of reference signal in the embodiment of the present application, and RS2 belongs to the second type of reference signal.

In the example of FIG. 5, the UE measures the beam corresponding reference signals used for beam scanning of the station 1 and the station 2. Specifically, the UE periodically measures RS1 and RS3 to obtain respective RSRPs. Assume that the RSRP of RS1=-95dBm, and the RSRP of RS3=-90dBm. If the UE selects the beam only according to the measurement result of the first type of reference signal, the RSRP of RS3 is better than the RSRP of RS1. Therefore, the UE will naturally select RS3 to report to the access network, and its service station is station 2.

However, in fact, at the stage of real data transmission, since station 1 has the ability to provide RS2 with better beam gain, the RSRP of RS2 may reach -88dBm. The RSRP of RS2 is not only higher than that of RS1 of station 1, but also higher than that of RS1. The RSRP of the RS3 of the station 2 is more beneficial to the data transmission of the UE.

It can be seen that the UE only selects a service site or a service beam according to the measurement result of the first type of reference signal, such as RSRP, and it may happen that a service beam that is not conducive to data transmission is selected.

Scene 2

The scene of multi-user pairing.

Due to the hardware limitations of analog beamforming, a set of RF channels can only be sent towards one beam direction at the same time. Generally, if the required beam gain is higher and the beam is narrower, the smaller the range that can be covered within the beam. In this article, "multi-user" refers to multiple users (ie, multi-terminal devices) that can be served on a set of radio frequency channels. Multi-user transmission is conducive to improving cell capacity. The premise of multi-user transmission is that there are multiple users who can be paired. If the beam coverage is small, the number of users that can be covered will decrease. Moreover, because each user's data arrives randomly, not every user has data transmission needs at the same time. These factors ultimately make the probability of successful multi-user pairing low, and cannot play a role in improving cell capacity. Therefore, each user uses the beam with the best signal quality, which may not necessarily maximize the cell capacity. Description will be given below in conjunction with FIG. 6.

Refer to Fig. 6, which is a schematic diagram of a transmission beam in a multi-user pairing scenario. As shown in Figure 6, UE1 and UE2 are two different terminal devices. UE1 and UE2 respectively measure the reference signals RS1, RS2, and RS3 for beam scanning sent by station 1, and perform beam selection according to the measurement result of the reference signal, such as RSRP. In the example in Figure 6, UE1 will select RS1, and UE2 will select RS2. Therefore, the access network needs to use two sets of radio frequency channels to serve the two UEs respectively. Assume that in this case, the data transmission rates of UE1 and UE2 can reach rate 1 and rate 2, respectively.

If station 1 can provide the beams corresponding to RS3 for data transmission between UE1 and UE2, it is assumed that UE1 and UE2 reach rate 1'and rate 2'respectively, although these rates may satisfy equation (1):

Rate 1+rate 2>rate 1’+rate 2’ (1)

However, in the case where station 1 provides the beam corresponding to RS3 for data transmission between UE1 and UE2, station 1 only uses one set of radio frequency channels, and there is a set of radio frequency channels remaining to serve other users. Assuming that station 1 can also use the remaining set of radio frequency channels to serve UE3, and the data transmission rate provided by station 1 for UE3 can reach rate 3', then station 1 is for 3 users at the same time (ie, UE1, UE2, and UE3) Provide data transmission services. In this case, the data transmission rate of each user may satisfy equation (2):

Rate 1’+rate 2’+rate 3’>rate 1+rate 2 (2)

It can be seen that in scenario 2, the terminal device selects the beam only by measuring the quality of the first type of reference signal, which is not conducive to maximizing the cell capacity.

It can be seen that the terminal device selects the beam for data transmission by measuring the first type of reference signal and only considering its measurement results. In scenario 1, the terminal device may choose a beam that is not conducive to data transmission. In scenario 2, the beams selected by multiple terminal devices may not reach the maximum cell capacity in the end, which is not conducive to data transmission.

Therefore, in the technical solution of the present application, when a terminal device selects a beam for data transmission, in addition to considering the measurement result of the first type of reference signal, it also needs to consider the respective beam spreading factors of the first type of reference signal.

In scenario 1, the network side configures the beam spreading factor, its role is to indicate that the UE is within the coverage of the beam corresponding to the spreading factor, and the network side has the ability to provide narrower and higher gain beams for UE data transmission .

In other words, the beam spreading factor is configured on the network side, and its effect is that the terminal device uses the beam spreading factor to adjust the measurement results of the first type of reference signal, so as to avoid the measurement results of some first type reference signals being lower than other sites. As a result of the measurement results of the first-type reference signal, the terminal device directly loses the possibility of selecting some sites corresponding to the first-type reference signals as the service site, thereby avoiding selecting sites that are not conducive to data transmission as the service site.

In scenario 2, the network side configures the beam spreading factor, which can assist the UE to select a beam that is conducive to maximizing cell capacity.

The network side configures the beam spreading factor for the terminal device to adjust the measurement result of the first type reference signal, which improves the possibility that the beam corresponding to the first type reference signal with a lower measurement result is selected as the service beam by the terminal device, and improves The probability of successful multi-user pairing helps the terminal device to select the beam that maximizes the cell capacity.

Optionally, in step 220, the beam spreading factor may be specified by the protocol, or may be configured by the access network device for the UE through radio resource control (radio resource control, RRC) signaling, without limitation.

In some examples, the access network device may configure the beam spreading factor for the UE through RRC signaling. In this case, step 240 may also be included before step 220.

240. The access network device sends configuration information to the UE, where the configuration information carries information about the beam spreading factor.

It should be understood that the configuration information carries information about the beam spreading factor corresponding to the first-type reference signal of each site.

As some examples, the access network equipment can use downlink resources or channels such as broadcast channels, system messages, system message updates, paging messages, downlink control channels, downlink data channels, and downlink shared channels, or through radio resource control (radio resource control). , RRC) signaling, media access control-control element (MAC-CE) message, or DCI, etc. send the configuration information to the terminal device without limitation.

Optionally, in some examples, the configuration information may carry beam spreading factors corresponding to all the first-type reference signals of each site.

For example, in the example of FIG. 5, the configuration information may carry the beam spreading factor corresponding to RS1 and the beam spreading factor corresponding to RS3.

Optionally, in other examples, the configuration information may carry a beam spreading factor corresponding to a part of the first-type reference signal, while another part of the first-type reference signal is not configured with a beam spreading factor. Among them, the measurement result of the first type reference signal for which the beam spreading factor is not configured is non-adjustable by default.

For example, in the example in Figure 5, the UE obtains the RSRP of RS1 and the RSRP of RS3 through periodic measurement, and the configuration information received from the access network device only carries the beam spreading factor corresponding to RS1, the UE defaults to RS3 does not have beam spreading capabilities.

Or, in other examples, the beam spreading factor corresponding to the first type reference signal that does not have the beam spreading capability may be configured to be 0 dB, and the default is that the first type reference signal does not have the beam spreading capability.

For example, in the example of FIG. 5, the beam spreading factor corresponding to RS1 may be xdB, and the beam spreading factor corresponding to RS3 may be 0dB, where x is an integer and x≠0.

Optionally, the configuration information may be included in the RRC message, which is not limited.

As mentioned above, the configuration of the beam spreading factor is based on reference signal resource granularity.

As an example, some fields of the configuration information can be as follows:

Wherein, "ExpansionFactor" represents the beam expansion factor in the embodiment of the present application. In the above example, the value of the beam spreading factor is an integer, for example, the value range is {-15,...16}, and the unit is dB.

In this article, the value of the beam spreading factor is only used as an example. According to the function of the beam spreading factor, those skilled in the art can also set different value ranges in different scenarios, which are not limited.

For example, if the RSRP difference between the first type of reference signal and the second type of reference signal sent by a station is large, the beam spreading factor can be set to be larger. If the RSRP difference between the first type of reference signal and the second type of reference signal is small, the beam spreading factor can be set to be smaller.

In another embodiment, the configuration of the beam spreading factor may be "resource set level". It should be understood that "resource set level" means that the beam spreading factor can be used to adjust each resource in the resource set.

In an example, part of the resources of the configuration information can be as follows:

Similarly, "ExpansionFactor" means beam expansion factor. In the above example, the value of the beam spreading factor is an integer, and the value range is {-15,...16}.

In some examples, if the configuration information contains only part of the beam spreading factor of the first type of reference signal, instead of the beam spreading factor of all the first type of reference signals that can be measured by the terminal device, the default is that no beam spreading factor is configured The first type of reference signal has no beam spreading function, in other words, the default value of the beam spreading factor is 0dB.

In addition, the terminal device considers the beam spreading factor to select the service beam used for data transmission, instead of just taking the measurement result of the first type of reference signal as the only factor to be considered, it is a manifestation of the terminal device's ability. In other words, only terminal devices that support the selection of the service beam for data transmission based on the beam spreading factor can use the technical solution provided in this application to select the service beam for data transmission and report to the network.

Optionally, the method 200 may further include step 250.

250. The terminal device sends capability information to the access network device, where the capability information is used to indicate that the terminal device supports selection of a reference signal based on a beam spreading factor.

For example, the access network device receives the capability information from the terminal device, and when the terminal device supports the selection of the first type of reference signal based on the beam spreading factor, it sends the information of the beam spreading factor of the first type of reference signal to the terminal device to facilitate The terminal equipment is subsequently used for beam selection.

For another example, the access network device receives capability information from the terminal device, where the capability information is used to indicate that the terminal device does not support selecting the first type of reference signal based on the beam spreading factor. In this case, the access network device may choose not to send the information of the beam spreading factor to the terminal device. This situation is not concerned in this application.

It should be understood that the numbering of the steps in the method 200 is only to facilitate the description of the process of the method, and the embodiment does not limit the sequence of the steps.

In some examples, the setting of the value of the beam spreading factor is related to the capability of the access network device.

For example, the value of the beam spreading factor is set based on the ratio or difference between the number of antenna elements activated when the access network device sends the first type of reference signal and the number of antenna elements activated when the access network device sends the second type of reference signal. of.

For another example, the value of the beam spreading factor is based on the ratio of the number of radio frequency channels when the access network device sends the first type reference signal to the number of radio frequency channels activated when the access network device sends the second type reference signal, or The difference is set.

For another example, the value of the beam spreading factor is set based on the ratio or difference between the transmission power when the access network device transmits the first type reference signal and the transmission power when the access network device transmits the second type reference signal. Fixed.

For another example, the value of the beam spreading factor is based on the effective radiated power (EIRP) when the access network device sends the first type reference signal and the value when the access network device sends the second type reference signal. The ratio or difference of EIRP is set.

For another example, the value of the beam spreading factor is set based on the ratio or difference between the antenna gain when the access network device sends the first type reference signal and the antenna gain when the access network device sends the second type reference signal. Fixed.

Optionally, in some examples, in step 220, the terminal device sending a measurement report is triggered based on an event. In other words, the terminal device measures the first-type reference signal from the access network device to obtain the measurement result of the first-type reference signal. Further, the terminal device sends a measurement report when the trigger condition triggered by the event is met according to the measurement result of the first type of reference signal and the beam spreading factor.

Taking scenario 1 as an example, the trigger condition may be trigger condition 1 and/or trigger condition 2 as follows.

Trigger condition 1: The adjustment value of the measurement result of the first type of reference signal is higher than or equal to the threshold value.

For example, if the threshold is -90dBm, the terminal device measures one or more first-type reference signals from the access network device, and obtains the measurement result of the one or more first-type reference signals. Combined with the beam spreading factor corresponding to the one or more first-type reference signals, the terminal device adjusts the measurement result of each first-type reference signal in the one or more first-type reference signals to obtain its measurement The adjusted value of the result. The terminal device compares the adjustment value of these measurement results with the threshold value. If there is an adjustment value higher than the threshold value, the terminal device sends a measurement report to the access network device, where the measurement report contains the adjustment value of the measurement result. The identification of one or more reference signals of the first type at the threshold value, that is, the identification of one or more reference signals mentioned above.

In other words, the measurement report includes one or more reference signal identifiers, and the reference signal corresponding to each reference signal identifier belongs to the first type of reference signal whose adjustment value of the measurement result is higher than the threshold value.

For example, the terminal device measures three first-type reference signals, which are RS1, RS2, and RS3, respectively, where the adjusted value of RSRP of RS1 and the adjusted value of RSPR of RS2 are higher than the threshold. Then the terminal device sends a measurement report to the access network device.

In an example, the measurement report may include the identification of all reference signals whose adjustment value of the measurement result is higher than the threshold value. For example, the measurement report may include the identification of RS1 and the identification of RS2.

In another example, the measurement report may include the identifier of a part of the reference signal whose adjustment value of the measurement result is higher than the threshold. For example, the measurement report may include the identifier of RS1, or the measurement report may include the identifier of RS2.

How the terminal device reports the identification of the selected reference signal can be configured by the network, and the embodiment does not limit it. For example, the terminal device may select the first type reference signal with the highest adjustment value from the first type reference signal whose adjustment value is higher than the threshold value to report, or the terminal device may select the first type reference signal whose adjustment value is higher than the threshold value to report. Randomly select one of the class reference signals to report.

Optionally, in addition to the reference signal identifier, the measurement report may also include the adjustment value of the measurement result of the first type of reference signal corresponding to each reference signal identifier.

For example, the situation of the terminal equipment measuring the reference signal is shown in Table 2.

Table 2

Due to the configuration of the beam spreading factor, after the terminal device completes the measurement, it needs to consider the influence of the beam spreading factor and calculate the adjustment value of each measurement result, as shown in Table 3.

table 3

It can be found that if the beam spreading factor is not configured, the terminal device can determine that the RSRP of RS1 is greater than the threshold value through the measured RSRP of the different first type reference signals, and the RSRP of RS3 is less than the threshold value, the terminal device will select RS1 And report to the network side.

However, if the beam spreading factor is configured and the terminal device uses the beam spreading factor to adjust the measurement result of the first type of reference signal, and finds that the RSRP of RS3 is also greater than the threshold, the terminal device can choose to report RS3. In fact, if the terminal device selects station 1 corresponding to RS3, it can obtain the narrower and higher beam gain beam provided by station 1 (for example, the beam corresponding to RS2 in Figure 5) for data transmission, so that the terminal device can obtain A higher data transmission rate helps avoid the problems described in scenario 1 above.

Trigger condition 2: The adjusted value of the RSRP of the first reference signal is higher than the adjusted value of the RSRP of the second reference signal.

Wherein, the first reference signal and the second reference signal both belong to the first type of reference signal measured by the terminal equipment, and the adjustment value of the RSRP of the first reference signal is the first beam spreading factor corresponding to the first reference signal. The RSRP of a reference signal is adjusted, and the adjusted value of the RSRP of the second reference signal is obtained by adjusting the RSRP of the second reference signal by using the second beam spreading factor corresponding to the second reference signal.

For example, taking site switching as an example, in trigger condition 2, the terminal device measures at least two first-type reference signals, and according to the respective beam spreading factors of the at least two first-type reference signals, the terminal device performs The RSRP of the first type of reference signal is adjusted to obtain the adjusted value of the RSRP. The terminal device compares these adjustment values, and if it is satisfied that the adjustment value of the RSRP of the first reference signal provided by a station (for example, the first station) is greater than the adjustment of the RSRP of the second reference signal provided by the current station (for example, the second station) Value, the trigger condition 2 is satisfied, and the terminal device sends a measurement report to the access network device, requesting handover to the first site. Wherein, the measurement report may carry the identifier of the first reference signal.

Subsequently, the terminal device may receive the third reference signal from the access network device. Specifically, the third reference signal may be sent by the first station that sends the first reference signal. In other words, the RSRP of the first reference signal sent by the first station is configured with a beam spreading factor, which means that the first station can also provide the terminal device with a beam with a gain higher than that of the beam corresponding to the first reference signal, that is, the third The beam corresponding to the reference signal. In addition, the third reference signal itself is a data signal, in other words, the beam corresponding to the third reference signal is used for data transmission, and the beams corresponding to the first reference signal and the second reference signal are used for beam scanning.

It should be understood that the current site refers to a site that currently provides a service beam for the UE.

In this scenario, the first reference signal in trigger condition 2 belongs to the first type of reference signal of the first station, and the second reference signal belongs to the first type of reference signal of the second station (that is, the current station).

Generally, the identification of the reference signal is associated with the station number.

In the embodiment of the present application, the first reference signal and the second reference signal belong to different reference signal sets. The identification of the reference signal set is related to the number of the station.

The site number may be, for example, information related to one or more of the following information:

Control channel resource collection index (CORESET index), control channel resource collection pool index (CORESETPoolIndex), "serving cell index", "serving cell identifier (ID)", "non-serving cell identifier (ID)", "Non-serving cell index", "cell ID", "physical cell identity (PCI)", "transmission point identification (or transmission point index)" and "component carrier" identifier, CC ID)” and so on.

According to the association relationship between the reference signal identification and the station number, the terminal equipment can obtain the information of the station corresponding to the first type reference signal according to the measured identification of the first type reference signal, so as to determine whether there is a better beam Other sites. If the beam provided by other sites is better than the current site, the terminal device can request the access network device to switch the site.

For another example, taking beam switching as an example, the terminal device does not need to distinguish which site each measured reference signal of the first type comes from, but only needs to adjust the RSRP of one reference signal to be higher than the RSRP of another reference signal. In the case of the value, the measurement report can be sent to the access network device, requesting to switch the service beam. Specifically, the terminal device may request the beam corresponding to the first type of reference signal with a higher adjustment value as the serving beam.

Optionally, in this scenario, the second reference signal in trigger condition 2 may be the reference signal corresponding to the current serving beam of the terminal device, and the first reference signal may be the reference signal of the first type of reference signal measured by the terminal device. anyone.

The data in Table 2 and Table 3 above are taken as examples. Suppose that the RS1 of RS1 measured by the terminal equipment is -90dBm, and the RSRP of RS3 is -95dBm, as shown in Table 2, and the site that currently provides service beams for the terminal equipment is The site corresponding to RS1. The terminal equipment uses the beam spreading factor to adjust the RSRP of RS1 and the RSRP of RS3 to obtain the adjusted value of RSRP, as shown in Table 3.

Since the adjusted value of RSRP of RS1 is smaller than the adjusted value of RSRP of RS3, and the trigger condition 2 is satisfied, the terminal device may send a measurement report to request to switch the service site. For example, the terminal device can request to switch to the station corresponding to RS3.

For another example, the RSRP of the first type of reference signal measured by the terminal device and the configured beam spreading factor are shown in Table 4.

Table 4

According to the data shown in Table 4, the terminal device judges that the adjusted RSRP of RS1> the adjusted RSRP of RS3, and the trigger condition 2 is not satisfied, and the terminal device may not send a measurement report.

It can be seen that in the technical solution of the present application, the network side configures the beam spreading factor for the terminal device to notify the terminal device to provide a beam with a higher beam based on the first type of reference signal corresponding to the beam used for beam scanning. The gain beam is used for data transmission, which helps the terminal equipment to select a site that can provide a higher data transmission rate, which is conducive to data transmission.

The manner in which the access network device configures the beam spreading factor for the terminal device in the above embodiment is just an example. The network device can also introduce the beam spreading factor in the initial access process, beam management process, and handover process. Some other things are given below. The realization.

In some embodiments, the access network device may configure the beam spreading factor related information in the random access related indication. For example, the access network device configures the beam spreading factor related information and the transmission power of the SS/PBCH together. Each SS/PBCH can have different beam spreading factors.

The terminal device can adjust the SS/PBCH measurement result according to the beam spreading factor to select the corresponding access resource, for example, select the RACH resource corresponding to the SS/PBCH with the highest adjusted RSRP for access. Among them, the correspondence between SS/PBCH and RACH resources is pre-configured. Optionally, the transmit power at which the terminal transmits the RACH resource can be adjusted according to the beam spreading factor. For example, after the adjustment, the beam spreading factor corresponding to the SS/PBCH with the highest RSRP is 3dB, then the RACH resource power corresponding to the terminal’s transmission is min{maximum output power, target power+path loss+3dB}, where min{} means the minimum Value operation, the target power is pre-configured, and the path loss is the transmission power of the SS/PBCH minus the measured RSRP of the SS/PBCH.

In other embodiments, the access network device may configure the beam spreading factor related information in the downlink beam related indication. For example, the TCI state may include a beam spreading factor. Each TCI state can have different beam spreading factors.

The terminal device can adjust the receiving average gain (average gain) according to the beam spreading factor. For example, the beam spreading factor corresponding to the reference signal in the TCI state indication used for the PDSCH is 3dB, then the terminal should assume that the average gain of the received PDSCH is 3dB higher than the average gain of the received reference signal. In other words, when using the QCL parameter of the reference signal to compensate the PDSCH, an additional 3dB gain needs to be considered.

In other embodiments, the access network device may configure the beam spreading factor related information in the uplink beam related indication. For example, the beam spreading factor may be included in the spatial relation or the uplink TCI. Each spatial relation or uplink TCI can have a different beam spreading factor.

The terminal device can adjust the uplink transmission beam or the uplink transmission power according to the beam spreading factor. For example, if the beam spread factor corresponding to the reference signal in the spatial relation indication of the PUCCH is 3dB, then the terminal uses a transmit beam with a beam gain that is 3dB higher than the transmit beam gain corresponding to the receive beam of the reference signal. Alternatively, the terminal uses the transmit beam corresponding to the receive beam of the reference signal for uplink transmission, but an additional 3dB transmit power needs to be considered.

In other embodiments, the access network device may configure the beam spreading factor related information in the transmission power related indication. For example, the access network device may configure the beam spreading factor related information in the path loss reference signal related indication.

The terminal device may determine the uplink transmission power according to the related information of the beam spreading factor. For example, the beam spreading factor corresponding to the path loss reference signal is 3dB. For example, the terminal device can determine the transmit power according to min{maximum output power, target power + (path loss + 3dB) + other adjustments}, where min{} means the minimum Value operation, the target power is the pre-configured P0, and the path loss is the path loss reference signal transmission power minus the measured RSRP of the path loss reference signal.

The application of the technical solution of the present application in scenario 1 will be described below with reference to FIG. 7 by way of example.

Refer to FIG. 7, which is an example of the method for selecting beams provided by this application.

310. The terminal device sends capability information to the access network device, where the capability information is used to instruct the terminal device to support selection of a reference signal for data transmission based on a beam spreading factor.

The access network device receives the capability information from the terminal device.

Optionally, the capability information can be carried in the RRC message, which is not limited.

As an example, in a case where the capability information is used to indicate that the terminal device supports selection of a service beam based on the spreading factor, the access network device executes step 320.

320. The access network device sends configuration information to the terminal device, where the configuration information includes beam spreading factor information.

Optionally, the configuration information can be carried in an RRC message.

Among them, the information of the beam spreading factor can refer to the above description, and will not be repeated.

330. The access network device sends M type 1 reference signals to the terminal device, where M≥1, and M is an integer.

The terminal device measures M first-type reference signals from the access network device, and obtains the RSRP of each first-type reference signal in the M first-type reference signals.

340. When the trigger condition 1 or the trigger condition 2 is met, the terminal device sends a measurement report to the access network device. The measurement report includes N reference signal identifiers, where N≥1, N≤M, and N is an integer.

Wherein, the N reference signal identifiers are used to identify N first-type reference signals, and the N first-type reference signals belong to the M first-type reference signals. In other words, the N first-type reference signals are selected from the M first-type reference signals.

Specifically, the terminal device adjusts the RSRPs of the M first-type reference signals respectively according to the beam spreading factors of the M first-type reference signals to obtain the respective RSRPs of the M first-type reference signals The adjusted value. Further, the terminal device selects N first-type reference signals to feed back to the access network device according to the RSRP adjustment values of the M first-type reference signals. Wherein, the measurement report carries the identifiers of the selected N first-type reference signals.

350. The access network device sends the second type of reference signal to the terminal device based on the received measurement report.

Among them, the second type of reference signal is used to transmit data. In other words, the second type of reference signal is the data signal.

For example, in FIG. 5, the UE measures RS1 (ie, an example of the first reference signal) and RS3 (ie, an example of the second reference signal) from the access network device. According to the adjusted value of RSRP of RS1 and RSRP of RS3, the UE sends a measurement report to the access network device, and the measurement report carries the identifier of RS1. Subsequently, the access network device sends a third reference signal to the terminal device according to the measurement report of the terminal device. For example, in FIG. 5, the access network device sends RS2 to the terminal device through station 1 (ie, an example of the third reference signal) , The beam corresponding to RS2 is the beam used for data transmission.

In this embodiment, the terminal device measures one or more first-type reference signals from the access network device, that is, the terminal device measures the first-type reference signals from one or more sites. The terminal device considers the influence of the beam spreading factor on the measurement results of the first type of reference signal, and adjusts the respective measurement results according to the beam spreading factor corresponding to the first type of reference signal, and selects the serving beam to report according to the adjusted value, which is beneficial to the terminal The equipment is selected to a site that can provide a second type of reference signal that is more conducive to data transmission. Therefore, the station that can provide the second type of reference signal sends the second type of reference signal to the terminal device, which can increase the data transmission rate.

The application of the technical solution of the present application in scenario 1 is described above, and the application of the embodiment of the present application in scenario 2 is described below.

Referring to FIG. 8, FIG. 8 is another schematic flowchart of the method for selecting a beam provided by this application. The method 500 mainly includes steps 510-530. Optionally, steps 540 and/or 550 may also be included.

510. The terminal device measures one or more first-type reference signals from the access network device, and obtains a measurement result of each first-type reference signal.

For step 510, refer to step 210, which will not be described again.

520. The terminal device sends a measurement report, and the measurement report includes one or more reference signal identifiers.

In scenario 2, after the terminal device completes the measurement, it can send a measurement report to the access network device according to the configuration on the network side.

Here, the configuration on the network side may include the number of reference signals reported by the terminal device.

For example, the terminal device 1 measures the reference signal as shown in the data in Table 5.

table 5

The situation of the reference signal measured by the terminal device 2 is shown in the data in Table 6.

Table 6

Table 5 and Table 6 can be understood in conjunction with the scenario shown in FIG. 6.

Suppose that the network side configures the terminal device to report only one reference signal identifier. For example, the network side configures nrofreportedbeam=1 in the configuration information, which means that the terminal device can only report one reference signal identifier and the corresponding RSRP adjustment value, then the terminal device 1 According to the beam spreading factors corresponding to RS1 and RS3, the RSRP of RS1 and the RSRP of RS3 are adjusted to obtain respective adjustment values. According to the data shown in Table 5, terminal device 1 should select RS3 to report. Therefore, the terminal device 1 sends a measurement report 1 to the access network device, and the measurement report 1 contains the RS3 identifier.

The terminal device 2 adjusts the RSRP of RS2 and the RSRP of RS3 according to the respective beam spreading factors of RS2 and RS3 to obtain the adjusted RSRP. According to the data shown in Table 6, terminal device 2 should select RS3 to report. Therefore, the terminal device 2 sends a measurement report 2 to the access network device, and the measurement report 2 contains the RS3 identifier.

In this example, RS3 is an example of the fourth reference signal. For details, refer to the scenario shown in FIG. 6.

Here, the terminal device can only report one reference signal identifier 2 as an example. The network side can also configure the terminal device to adopt other reporting methods.

For example, the network side may configure the terminal device to report the identification of two or more reference signals. For another example, the network side may configure the terminal equipment to report the identification of all reference signals above the threshold. For another example, in addition to the identification of the selected reference signal, the measurement report may also carry the adjusted measurement result of the reference signal, which is not limited.

The access network device receives measurement reports from at least two terminal devices.

530. The access network device provides service beams for data transmission to the at least two terminal devices according to the measurement reports of the at least two terminal devices.

It should be understood that in Scenario 2, based on the consideration of maximizing cell capacity, under the condition that the number of radio frequency channels remains unchanged, in order to enable one access network device to serve more terminal devices, the access network device mainly considers whether there is Multiple terminal devices that can be paired (ie, multiple users). If there are terminal devices that can be paired, the access network device provides service beams for the multiple terminal devices through a set of radio frequency channels.

Taking Table 5 and Table 6 as examples, terminal device 1 sends measurement report 1, measurement report 1 carries the identification of RS3, terminal device 2 sends measurement report 2, and measurement report 2 contains the identification of RS3. According to the measurement report 1 and the measurement report 2, the access network equipment can learn that the terminal equipment 1 and the terminal equipment 2 can be paired. Therefore, the access network equipment provides RS3 as its data transmission service for both the terminal equipment 1 and the terminal equipment 2. Beam.

In addition, in step 530, when the access network device provides the terminal device 1 and the terminal device 2 with a wide beam for data transmission as a service beam, the muting can cover the narrow beam of the terminal device 1 and the terminal device 2.

Taking Figure 6 as an example, it is assumed that both UE1 and UE2 have reported the identification of RS3, and station 1 provides UE1 and UE2 with RS3 as a service beam for data transmission, while silent RS1 and RS2.

In addition, in scenario 2, the beam spreading factor may be specified by the protocol, or the access network device may be configured for the UE through radio resource control (radio resource control, RRC) signaling, and there is no restriction.

Optionally, as an example, step 540 may be further included before step 520.

540. The access network device sends configuration information to the terminal device, where the configuration information carries information about the beam spreading factor.

Regarding the configuration of the beam spreading factor, reference signal resources, reference signal resource sets, carriers or cells, etc. may be granular. This is the same as the introduction in scenario 1, see above, and will not be repeated.

In addition, in the process shown in FIG. 8, step 550 may also be included.

550. The terminal device sends capability information to the access network device, where the capability information is used to instruct the terminal device to support selection of a reference signal for data transmission based on a beam spreading factor.

It should be understood that the capability information is specifically used to indicate that the terminal device supports the selection of the first type of reference signal based on the beam spreading factor.

Step 550 may be before step 510, or before step 530, or after the UE accesses the network, which is not limited herein.

Applying the technical solution of this application in scenario 2, the beam spreading factor configured by the access network device is related to the cell capacity, and the terminal device considers the beam spreading factor to select the reference signal, which is beneficial for the terminal device to select the serving beam that can maximize the cell capacity .

The following uses the scenario shown in FIG. 6 and FIG. 9 as an example for description.

Refer to FIG. 9, which is another example of the beam selection method provided by this application.

610. The terminal device sends capability information to the access network device, where the capability information is used to indicate that the terminal device supports selection of a reference signal based on a beam spreading factor.

Specifically, in a multi-user scenario, each terminal device can send its own capability information to the network side. In FIG. 9, terminal device 1 and terminal device 2 are taken as examples.

620. The access network device sends configuration information to the terminal device, where the configuration information includes beam spreading factor information.

The terminal device 1 and the terminal device 2 respectively receive the configuration information from the access network device, thereby obtaining the information of the beam spreading factor.

630. The access network device sends one or more first-type reference signals.

As shown in Figure 6, station 1 sends RS1, RS2, and RS3. RS1, RS2, and RS3 all belong to the first type of reference signals.

640. The terminal device sends a measurement report to the access network device based on the configuration on the network side.

As an example, the terminal device selects the first type of reference signal to be reported from the measured first type of reference signal based on the selection principle of “selecting the first type of reference signal with the largest RSRP adjustment value to report”.

For example, the network side configures the terminal equipment to report only one reference signal identifier. For UE1, RS1 and RS3 can be measured. Assuming that the RSRP of RS1 and RS3 measured by UE1 is shown in Table 5, UE1 will use the first measured RSRP as shown in Table 5. The RSRP adjustment value of the class reference signal sends a measurement report 1 to the access network device. Based on the above selection principle, UE1 should select RS3. Therefore, the RS3 identification is included in the measurement report 1.

For UE2, UE2 can measure RS2 and RS3. Based on the same selection principle, it is assumed that the RSRP of RS2 and RS3 measured by UE2 are as shown in Table 6. UE2 sends measurement report 2 to the access network device according to the measured RSRP adjustment value of the first type of reference signal. Measurement report 2 contains the RS3 logo.

It should be understood that RS3 is an example of the fourth reference signal.

650. Based on the measurement report 1 and the measurement report 2, the access network device provides the beam corresponding to RS3 (that is, the fourth reference signal) as the service beam for the terminal device 1 and the terminal device 2 for data transmission.

The access network device configures a beam spreading factor for the terminal device from the perspective of the maximum cell capacity, so that multiple terminal devices can be successfully paired, thereby being able to select the beam that helps maximize the cell capacity, thereby improving the cell capacity.

The method for selecting beams provided by this application has been described in detail above with reference to Figs. 2-9, and the communication device of this application is introduced below.

Refer to FIG. 10, which is a schematic block diagram of the communication device provided by this application. As shown in FIG. 10, the communication device 1000 includes a processing unit 1100 and a transceiver unit 1200.

The processing unit 1100 is configured to receive a reference signal from an access network device, and obtain a measurement result of the reference signal;

The transceiver unit 1200 is configured to send a measurement report, the measurement report including the one or more reference signal identifiers, and the reference signal corresponding to the one or more reference signal identifiers is based on the beam spreading factor and the measurement of the reference signal If the result is determined, the beam spreading factor is used to adjust the measurement result of the reference signal.

Optionally, in an embodiment, the transceiver unit 1200 is further configured to receive configuration information from the access network device, where the configuration information includes information about the beam spreading factor.

Optionally, in another embodiment, the transceiving unit 1200 is further configured to send capability information to the access network device, where the capability information is used to indicate that the terminal device supports selecting a reference signal based on the beam spreading factor.

Optionally, in another embodiment, the configuration information includes information about the expansion factor, including:

The configuration information includes one or more beam spreading factors, and each beam spreading factor corresponds to a reference signal, where each beam spreading factor is used to adjust the measurement result of the corresponding reference signal; or,

Optionally, in another embodiment, the measurement report further includes an adjustment value of the measurement result of the reference signal corresponding to each reference signal identifier, wherein the adjustment value of the measurement result of the reference signal is based on The beam spreading factor corresponding to the reference signal is obtained by adjusting the measurement result of the reference signal.

Optionally, in another embodiment, the measurement result is RSRP, and the transceiving unit 1200 is configured to receive at least two reference signals from the access network device to obtain each of the at least two reference signals. RSRP;

And, the processing unit 1100 is configured to:

According to the association relationship between the reference signal identifier and the station number, it is determined that the first reference signal of the at least two reference signals comes from the first station, and the second reference signal of the at least two reference signals comes from the second station, Wherein, the second site is a service site of the terminal device, and beams corresponding to each of the first reference signal and the second reference signal are used for beam scanning;

And, according to the respective RSRPs of the first reference signal and the second reference signal and the beam spreading factors corresponding to the first reference signal and the second reference signal, when a trigger condition is met, control all The transceiving unit 1200 sends the measurement report to the access network device, where the measurement report includes the identifier of the first reference signal,

Wherein, the trigger conditions are as follows:

The adjustment value of the RSRP of the first reference signal is higher than the RSRP of the second reference signal or the adjustment value of the RSRP of the second reference signal, wherein the adjustment value of the RSRP of the first reference signal is based on The first beam spreading factor corresponding to the first reference signal is obtained by adjusting the RSRP of the first reference signal, and when the second reference signal is configured with a second beam spreading factor, the second reference signal The adjustment value of the RSRP is obtained by adjusting the RSRP of the second reference signal according to the second beam spreading factor.

Optionally, in another embodiment, the transceiver unit 1200 is further configured to receive a third reference signal from the access network device, and the beam corresponding to the third reference signal is generated by the first reference signal. Provided by the site, the beam corresponding to the third reference signal is used for data transmission;

Wherein, the gain of the beam corresponding to the third reference signal sent by the first station to the terminal device is higher than the gain of the beam corresponding to the first reference signal sent by the first station to the terminal device , And the gain of the beam corresponding to the third reference signal sent by the first station to the terminal device is higher than the gain of the beam corresponding to the second reference signal sent by the second station to the terminal device .

Optionally, in another embodiment, the transceiving unit 1200 is specifically configured to measure at least two reference signals from the access network device to obtain measurement results of the at least two reference signals, and The beams corresponding to each of the at least two reference signals are used for beam scanning, where the at least two reference signals include a fourth reference signal;

And, the processing unit 1100 controls the transceiver unit 1200 to send the measurement report when it is determined that the trigger condition is satisfied, the measurement report includes the identifier of the fourth reference signal, wherein the trigger condition is as follows:

Optionally, in another embodiment, the processing unit 1100 is further configured to use a beam corresponding to the fourth reference signal as a service beam, wherein the beam corresponding to the fourth reference signal is used by the access Provided by the network device, the measurement report of at least two terminal devices received by the access network device includes the identifier of the fourth reference signal, and the beam corresponding to the fourth reference signal serves as the at least two terminal devices Service beam.

Optionally, in another embodiment, the beam spreading factor is determined according to the following parameters:

Optionally, in an embodiment, the transceiver unit 1200 is further configured to receive a broadcast signal from an access network device, the broadcast signal carrying configuration information of the beam spreading factor of the reference signal, wherein the reference signal The beam spreading factor is used to adjust the measurement result of the reference signal;

And, the transceiving unit 1200 is further configured to measure at least two reference signals from the access network device to obtain measurement results of the at least two reference signals;

The processing unit 1100 is configured to select a first random access channel RACH resource to access the access network device, wherein the first RACH resource is associated with the first reference signal corresponding to the at least two reference signals Beam, the adjustment value of the measurement result of the first reference signal is higher than the measurement result of the other reference signals in the at least two reference signals or the adjustment value of the measurement result, wherein the adjustment value of the measurement result of each reference signal It is obtained by adjusting the measurement result of the reference signal according to the beam spreading factor corresponding to the reference signal.

Optionally, the transceiving unit 1100 may include a receiving unit and a sending unit. Among them, the receiving unit is specifically configured to perform a sending action, and the receiving unit is specifically configured to perform a receiving action.

In an implementation manner, the communication apparatus 1000 may be a terminal device in the method embodiment. In this implementation, the transceiver unit 1200 may be a transceiver, and the transceiver may include a transmitter and a receiver. The processing unit 1100 may be a processing device.

In another implementation manner, the communication device 1000 may be a chip or an integrated circuit installed in a terminal device. In this implementation, the transceiver unit 1200 may be a communication interface or an interface circuit. For example, the transceiver unit 1200 is an input/output interface, an input/output circuit, etc., and the processing unit 1100 may be a processing device.

Among them, the function of the processing device can be realized by hardware, or by hardware executing corresponding software. For example, the processing device may include a memory and a processor, where the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory, so that the communication device 1000 executes the operations performed by the terminal device in each method embodiment and /Or processing. Optionally, the processing device may only include a processor, and the memory for storing the computer program is located outside the processing device. The processor is connected to the memory through a circuit/wire to read and execute the computer program stored in the memory. For another example, the processing device may be a chip or an integrated circuit.

Refer to FIG. 11, which is a schematic block diagram of the communication device provided by this application. As shown in FIG. 11, the communication device 2000 includes a transceiver unit 2100 and a processing unit 2200.

The transceiver unit 2100 is configured to receive a measurement report from a terminal device, the measurement report containing one or more reference signal identifiers, where the measurement report is a measurement report from the terminal device from the access network device according to the measurement. A measurement result obtained by the reference signal and a beam spreading factor, where the beam spreading factor is used to adjust the measurement result of the reference signal;

The processing unit 2200 is configured to provide the terminal device with a service beam for data transmission according to the measurement report.

Optionally, in an embodiment, the transceiving unit 2100 is further configured to send configuration information to the terminal device, where the configuration information includes the beam spreading factor information.

Optionally, in another embodiment, the transceiver unit 2100 is further configured to:

Receiving capability information from the terminal device, where the capability information is used to indicate whether the terminal device supports selecting a reference signal based on the beam spreading factor.

Optionally, in another embodiment, the transceiver unit 2100 is configured to send at least two reference signals, where the at least two reference signals include the communication device sending the first reference signal through the first station, and the second reference signal through the communication device. The station sends a second reference signal, where the beams corresponding to each of the at least two reference signals are used for beam scanning;

And, the transceiving unit 2100 is further configured to receive a measurement report from the terminal device, the measurement report including the identifier of the first reference signal;

And, the processing unit 2200 is configured to control the transceiver unit 2100 to send a third reference signal to the terminal device according to the identifier of the first reference signal included in the measurement report, wherein the third reference signal The beam corresponding to the signal is used as the service beam of the terminal device for data transmission.

Sending at least two reference signals, and beams corresponding to each of the at least two reference signals are used for beam scanning, wherein the at least two reference signals include a fourth reference signal;

And, receiving measurement reports from at least two terminal devices, where the measurement reports of the at least two terminal devices all include the identifier of the fourth reference signal;

And, the processing unit 2200 is further configured to provide the transmission beam corresponding to the fourth reference signal as the service beam of the at least two terminal devices, and silence other transmission beams.

Optionally, the transceiving unit 2100 may include a receiving unit and a sending unit. Among them, the receiving unit is specifically configured to perform a sending action, and the receiving unit is specifically configured to perform a receiving action.

In an implementation manner, the communication apparatus 2000 may be an access network device in the method embodiment. In this implementation, the transceiver unit 2100 may be a transceiver, and the transceiver may include a transmitter and a receiver. The processing unit 2200 may be a processing device.

In another implementation manner, the communication device 2000 may be a chip or an integrated circuit installed in an access network device. In this implementation, the transceiver unit 2100 may be a communication interface or an interface circuit. For example, the transceiver unit 2100 is an input/output interface, an input/output circuit, etc., and the processing unit 2200 may be a processing device.

Among them, the function of the processing device can be realized by hardware, or by hardware executing corresponding software. For example, the processing device may include a memory and a processor, where the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory, so that the communication device 2000 executes the operations executed by the access network device in the various method embodiments. Operation and/or processing. Optionally, the processing device may only include a processor, and the memory for storing the computer program is located outside the processing device. The processor is connected to the memory through a circuit/wire to read and execute the computer program stored in the memory. For another example, the processing device may be a chip or an integrated circuit.

Refer to FIG. 12, which is a schematic structural diagram of the communication device 10 provided by this application. As shown in FIG. 12, the communication device 10 includes: one or more processors 11, one or more memories 12 and one or more communication interfaces 13. The processor 11 is used to control the communication interface 13 to send and receive signals, the memory 12 is used to store a computer program, and the processor 11 is used to call and run the computer program from the memory 12, so that the terminal device executes the Processes and/or operations are executed.

For example, the processor 11 may have the function of the processing unit 1200 shown in FIG. 10, and the communication interface 13 may have the function of the transceiving unit 1100 shown in FIG. Specifically, the processor 11 may be used to perform the processing or operation performed by the terminal device in Figure 2-9, and the communication interface 13 is used to perform the sending and/or receiving actions performed by the terminal device in Figure 2-9. .

In an implementation manner, the communication device 10 may be a terminal device in the method embodiment. In this implementation, the communication interface 13 may be a transceiver. The transceiver may include a receiver and a transmitter.

Optionally, the processor 11 may be a baseband device, and the communication interface 13 may be a radio frequency device.

In another implementation, the communication device 10 may be a chip installed in a terminal device. In this implementation manner, the communication interface 13 may be an interface circuit or an input/output interface.

Referring to FIG. 13, FIG. 13 is a schematic structural diagram of the communication device 20 provided in the present application. As shown in FIG. 13, the communication device 20 includes: one or more processors 21, one or more memories 22 and one or more communication interfaces 23. The processor 21 is used to control the communication interface 23 to send and receive signals, the memory 22 is used to store a computer program, and the processor 21 is used to call and run the computer program from the memory 22, so that the access network equipment is The executed process and/or operation is executed.

For example, the processor 21 may have the function of the processing unit 2200 shown in FIG. 11, and the communication interface 23 may have the function of the transceiving unit 2100 shown in FIG. Specifically, the processor 21 may be used to perform the processing or operation performed by the access network device in Figure 2-9, and the communication interface 23 is used to perform the sending and/or operations performed by the access network device in Figure 2-9. Or the action of receiving, I will not repeat it.

In an implementation manner, the communication device 20 may be an access network device in the method embodiment. In this implementation, the communication interface 23 may be a transceiver. The transceiver may include a receiver and a transmitter.

Optionally, the processor 21 may be a baseband device, and the communication interface 23 may be a radio frequency device.

In another implementation, the communication device 20 may be a chip installed in an access network device. In this implementation manner, the communication interface 23 may be an interface circuit or an input/output interface.

Optionally, the memory and the memory in the foregoing device embodiments may be physically independent units, or the memory may also be integrated with the processor, which is not limited herein.

In addition, this application also provides a computer-readable storage medium in which computer instructions are stored. When the computer instructions run on a computer, the operations performed by the terminal device in the method embodiments of this application are And/or the process is executed.

The present application also provides a computer-readable storage medium in which computer instructions are stored. When the computer instructions run on a computer, the operations performed by the access network device in the method embodiments of the present application are And/or the process is executed.

This application also provides a computer program product. The computer program product includes computer program code or instructions. When the computer program code or instruction runs on a computer, the operations and/or processes performed by the terminal device in the method embodiments of the application are Be executed.

This application also provides a computer program product. The computer program product includes computer program code or instructions. When the computer program code or instructions run on a computer, the operation and/ Or the process is executed.

In addition, the present application also provides a chip including a processor. The memory for storing the computer program is provided independently of the chip, and the processor is used to execute the computer program stored in the memory, so that the operation and/or processing performed by the terminal device in any method embodiment is executed.

Further, the chip may also include a communication interface. The communication interface may be an input/output interface, or an interface circuit or the like. Further, the chip may also include the memory.

The application also provides a chip including a processor. The memory for storing the computer program is provided independently of the chip, and the processor is used to execute the computer program stored in the memory, so that the operations and/or processing performed by the access network device in any method embodiment are executed.

In addition, this application also provides a wireless communication system, including the terminal device and/or the access network device in the embodiment of this application.

The processor in the embodiment of the present application may be an integrated circuit chip, which has the ability to process signals. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The processor can be a general-purpose processor, digital signal processor (digital signal processor, DSP), application specific integrated circuit (ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic Devices, discrete gates or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware encoding processor, or executed and completed by a combination of hardware and software modules in the encoding processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. 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.

The memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DRRAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

The term "and/or" in this application is merely an association relationship describing associated objects, which means that there can be three types of relationships. For example, A and/or B can mean that there is A alone, and both A and B exist. There are three cases of B. Among them, A, B, and C can all be singular or plural, and are not limited.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for selecting beams, characterized in that it comprises:

The terminal device measures the reference signal from the access network device to obtain the measurement result of the reference signal;

The terminal device sends a measurement report, the measurement report includes the one or more reference signal identifiers, and the reference signal corresponding to the one or more reference signal identifiers is determined according to the beam spreading factor and the measurement result of the reference signal Yes, the beam spreading factor is used to adjust the measurement result of the reference signal.
The method according to claim 1, wherein the method further comprises:

The terminal device receives configuration information from the access network device, where the configuration information includes the beam spreading factor information.
The method according to claim 2, wherein before the terminal device receives the configuration information from the access network device, the method further comprises:

The terminal device sends capability information to the access network device, where the capability information is used to indicate that the terminal device supports selection of a reference signal based on the beam spreading factor.
The method according to claim 2 or 3, wherein the configuration information includes information about expansion factors, including:

The configuration information includes one or more beam spreading factors, and each beam spreading factor corresponds to a reference signal, where each beam spreading factor is used to adjust the measurement result of the corresponding reference signal; or,

The configuration information includes one or more beam spreading factors, each beam spreading factor corresponds to a reference signal set, and each beam spreading factor is used to adjust the measurement result of any reference signal in the corresponding reference signal set.
The method according to any one of claims 1 to 4, wherein the measurement report further includes an adjustment value of the measurement result of the reference signal corresponding to each reference signal identifier, wherein the reference signal The adjustment value of the measurement result of the reference signal is obtained by adjusting the measurement result of the reference signal according to the beam spread factor corresponding to the reference signal.
The method according to any one of claims 1-5, wherein the measurement result is RSRP, and the terminal device measures a reference signal from an access network device to obtain a measurement result of the reference signal, include:

The terminal device measures at least two reference signals from the access network device to obtain respective RSRPs of the at least two reference signals;

The terminal device sends a measurement report, and the measurement report includes one or more reference signal identifiers, including:

According to the association relationship between the reference signal identifier and the station number, the terminal device determines that the first reference signal of the at least two reference signals comes from the first station, and the second reference signal of the at least two reference signals comes from A second site, where the second site is a service site of the terminal device, and beams corresponding to the first reference signal and the second reference signal are used for beam scanning;

According to the respective RSRPs of the first reference signal and the second reference signal and the beam spreading factors corresponding to the first reference signal and the second reference signal, the terminal device satisfies a trigger condition, Sending the measurement report to the access network device, where the measurement report includes the identifier of the first reference signal,

Wherein, the trigger conditions are as follows:

The adjustment value of the RSRP of the first reference signal is higher than the RSRP of the second reference signal or the adjustment value of the RSRP of the second reference signal, wherein the adjustment value of the RSRP of the first reference signal is based on The first beam spreading factor corresponding to the first reference signal is obtained by adjusting the RSRP of the first reference signal, and when the second reference signal is configured with a second beam spreading factor, the second reference signal The adjustment value of the RSRP is obtained by adjusting the RSRP of the second reference signal according to the second beam spreading factor.
The method according to claim 6, wherein after the terminal device sends the measurement report to the access network device, the method further comprises:

The terminal device receives a third reference signal from the access network device, the beam corresponding to the third reference signal is provided by the first station, and the beam corresponding to the third reference signal is used for data transmission;

Wherein, the gain of the beam corresponding to the third reference signal sent by the first station to the terminal device is higher than the gain of the beam corresponding to the first reference signal sent by the first station to the terminal device , And the gain of the beam corresponding to the third reference signal sent by the first station to the terminal device is higher than the gain of the beam corresponding to the second reference signal sent by the second station to the terminal device .
The method according to any one of claims 1-5, wherein the terminal device measuring a reference signal from an access network device to obtain a measurement result of the reference signal comprises:

The terminal device measures at least two reference signals from the access network device to obtain measurement results of the at least two reference signals, and beams corresponding to the at least two reference signals are used for beam scanning, where , The at least two reference signals include a fourth reference signal;

The terminal device sends a measurement report, and the measurement report includes one or more reference signal identifiers, including:

The terminal device sends the measurement report when a trigger condition is met, the measurement report includes the identifier of the fourth reference signal, wherein the trigger condition is as follows:

The adjusted value of the RSRP of the fourth reference signal is higher than the RSRP of the other reference signal among the at least two reference signals or the adjusted value of the RSRP of the other reference signal.
The method according to claim 8, wherein after the terminal device sends the measurement report when the trigger condition is met, the method further comprises:

The terminal device uses the beam corresponding to the fourth reference signal as the serving beam,

Wherein, the beam corresponding to the fourth reference signal is provided by the access network device, and the measurement report of at least two terminal devices received by the access network device includes the identity of the fourth reference signal, The beam corresponding to the fourth reference signal is used as the serving beam of the at least two terminal devices.
The method according to any one of claims 1-5, wherein the measurement result is RSRP, and the terminal device sending a measurement report to the access network device includes:

According to the measurement result of the reference signal and the beam spreading factor, the terminal device sends the measurement report to the access network device if the condition for event triggering is met, where the condition for event triggering includes the following One or more:

The RSRP adjustment value of the reference signal is higher than a threshold value, and the RSRP adjustment value of the reference signal is obtained by adjusting the RSRP of the reference signal by using the beam spreading factor corresponding to the reference signal; or,

The reference signal includes a first reference signal from a first station and a second reference signal from another station, and the RSRP adjustment value of the first reference signal is higher than the RSRP adjustment value of the second reference signal , Wherein the adjustment value of the RSRP of the first reference signal is obtained by adjusting the RSRP of the first reference signal by using the first beam spreading factor corresponding to the first reference signal, and the value of the second reference signal is The RSRP adjustment value is obtained by adjusting the RSRP of the second reference signal by adjusting the second beam spreading factor corresponding to the second reference signal.
The method according to any one of claims 1-10, wherein the beam spreading factor is determined according to the following parameters:

The ratio or difference between the number of antenna elements activated when the access network device sends the reference signal corresponding to the beam used for beam scanning and the number of antenna elements activated when the access network device sends the reference signal corresponding to the beam used for data transmission; or ；

The ratio or difference between the number of radio frequency channels when the access network device sends the reference signal corresponding to the beam used for beam scanning and the number of radio frequency channels activated when the access network device sends the reference signal corresponding to the beam used for data transmission; or,

The ratio or difference of the transmission power when the access network device sends the reference signal corresponding to the beam used for beam scanning and the transmission power when the access network device sends the reference signal corresponding to the beam used for data transmission.
A method for selecting beams, characterized in that it comprises:

The access network device receives a measurement report from a terminal device, the measurement report includes one or more reference signal identifiers, where the measurement report is a reference signal from the access network device that the terminal device measures according to The obtained measurement result and the beam spreading factor, where the beam spreading factor is used to adjust the measurement result of the reference signal;

The access network device provides the terminal device with a service beam for data transmission according to the measurement report.
The method according to claim 12, wherein before the access network device receives the measurement report from the terminal device, the method further comprises:

The access network device sends configuration information to the terminal device, where the configuration information includes the beam spreading factor information.
The method according to claim 13, wherein the configuration information includes information about an expansion factor, including:

The configuration information includes one or more beam spreading factors, and each beam spreading factor corresponds to a reference signal, where each beam spreading factor is used to adjust the measurement result of the corresponding reference signal; or,

The configuration information includes one or more beam spreading factors, each beam spreading factor corresponds to a reference signal set, and each beam spreading factor is used to adjust the measurement result of any reference signal in the corresponding reference signal set.
The method according to any one of claims 12-14, wherein the measurement report further includes an adjustment value of the measurement result of the reference signal corresponding to each reference signal identifier, wherein the reference signal The adjustment value of the measurement result of the reference signal is obtained by adjusting the measurement result of the reference signal according to the beam spread factor corresponding to the reference signal.
The method according to any one of claims 12-15, wherein before the access network device receives a measurement report from a terminal device, the method further comprises:

The access network device receives capability information from the terminal device, where the capability information is used to indicate whether the terminal device supports selection of a reference signal based on the beam spreading factor.
The method according to any one of claims 12-16, wherein before the access network device receives a measurement report from a terminal device, the method further comprises:

The access network device sends at least two reference signals, and the at least two reference signals include the access network device sending a first reference signal through a first site and sending a second reference signal through a second site, where: The beams corresponding to each of the at least two reference signals are used for beam scanning;

The receiving of the measurement report from the terminal device by the access network device includes:

Receiving, by the access network device, a measurement report from the terminal device, the measurement report including the identifier of the first reference signal;

The providing, by the access network device, a service beam for data transmission to the terminal device according to the measurement report includes:

The access network device sends a third reference signal to the terminal device through the first station according to the identifier of the first reference signal included in the measurement report, wherein the beam corresponding to the third reference signal As a service beam used for data transmission of the terminal device.
The method according to any one of claims 12-16, wherein before the access network device receives a measurement report from a terminal device, the method further comprises:

Sending at least two reference signals by the access network device, and beams corresponding to each of the at least two reference signals are used for beam scanning, wherein the at least two reference signals include a fourth reference signal;

The receiving of the measurement report from the terminal device by the access network device includes:

Receiving, by the access network device, measurement reports from at least two terminal devices, and the measurement reports of the at least two terminal devices both include the identifier of the fourth reference signal;

The access network device provides the transmission beam corresponding to the fourth reference signal as the service beam of the at least two terminal devices, and silences other transmission beams.
A communication device, characterized in that it comprises:

A processing unit, configured to measure a reference signal from an access network device to obtain a measurement result of the reference signal;

The transceiver unit is configured to send a measurement report, the measurement report containing the one or more reference signal identifiers, and the reference signal corresponding to the one or more reference signal identifiers is based on the beam spreading factor and the measurement result of the reference signal It is determined that the beam spreading factor is used to adjust the measurement result of the reference signal.
The communication device according to claim 19, wherein the transceiving unit is further configured to:

Receiving configuration information from the access network device, where the configuration information includes the beam spreading factor information.
The communication device according to claim 20, wherein the transceiving unit is further configured to:

Sending capability information to the access network device, where the capability information is used to indicate that the terminal device supports selection of a reference signal based on the beam spreading factor.
The communication device according to claim 20 or 21, wherein the configuration information includes information about an expansion factor, including:

The configuration information includes one or more beam spreading factors, and each beam spreading factor corresponds to a reference signal, where each beam spreading factor is used to adjust the measurement result of the corresponding reference signal; or,

The configuration information includes one or more beam spreading factors, each beam spreading factor corresponds to a reference signal set, and each beam spreading factor is used to adjust the measurement result of any reference signal in the corresponding reference signal set.
The communication device according to any one of claims 19-22, wherein the measurement report further includes an adjustment value of the measurement result of the reference signal corresponding to the reference signal identifier, wherein the reference The adjustment value of the measurement result of the signal is obtained by adjusting the measurement result of the reference signal according to the beam spreading factor corresponding to the reference signal.
The communication device according to any one of claims 19-23, wherein the measurement result is RSRP,

The transceiving unit is specifically configured to measure at least two reference signals from the access network device to obtain respective RSRPs of the at least two reference signals;

The processing unit is configured to determine, according to the association relationship between the reference signal identifier and the station number, that the first reference signal of the at least two reference signals comes from the first station, and the second reference signal of the at least two reference signals The signal comes from a second site, where the second site is a service site of the terminal device, and the respective beams corresponding to the first reference signal and the second reference signal are used for beam scanning;

And, the processing unit is further configured to, according to the respective RSRPs of the first reference signal and the second reference signal and the beam spreading factors corresponding to the first reference signal and the second reference signal, when satisfying In the case of a trigger condition, control the transceiver unit to send the measurement report to the access network device, where the measurement report includes the identifier of the first reference signal, wherein the trigger condition is as follows:

The adjustment value of the RSRP of the first reference signal is higher than the RSRP of the second reference signal or the adjustment value of the RSRP of the second reference signal, wherein the adjustment value of the RSRP of the first reference signal is based on The first beam spreading factor corresponding to the first reference signal is obtained by adjusting the RSRP of the first reference signal, and when the second reference signal is configured with a second beam spreading factor, the second reference signal The adjustment value of the RSRP is obtained by adjusting the RSRP of the second reference signal according to the second beam spreading factor.
The communication device according to claim 24, wherein the transceiving unit is further configured to receive a third reference signal from the access network device, and a beam corresponding to the third reference signal is generated by the third reference signal. Provided by a site, the beam corresponding to the third reference signal is used for data transmission;

Wherein, the gain of the beam corresponding to the third reference signal sent by the first station to the terminal device is higher than the gain of the beam corresponding to the first reference signal sent by the first station to the terminal device , And the gain of the beam corresponding to the third reference signal sent by the first station to the terminal device is higher than the gain of the beam corresponding to the second reference signal sent by the second station to the terminal device .
The communication device according to any one of claims 19-23, wherein the transceiver unit is further configured to measure at least two reference signals from the access network device to obtain the at least two reference signals Signal measurement result, the beams corresponding to each of the at least two reference signals are used for beam scanning, wherein the at least two reference signals include a fourth reference signal;

The processing unit is configured to send the measurement report when a trigger condition is met, the measurement report includes an identifier of the fourth reference signal, wherein the trigger condition is as follows:

The adjusted value of the RSRP of the fourth reference signal is higher than the RSRP of the other reference signal among the at least two reference signals or the adjusted value of the RSRP of the other reference signal.
The communication device according to claim 26, wherein the processing unit is further configured to use a beam corresponding to the fourth reference signal as a service beam,

Wherein, the beam corresponding to the fourth reference signal is provided by the access network device, and the measurement report of at least two terminal devices received by the access network device includes the identity of the fourth reference signal, The beam corresponding to the fourth reference signal is used as the serving beam of the at least two terminal devices.
23. The communication device according to any one of claims 19-23, wherein the measurement result is RSRP, and the processing unit is further configured to determine when an event is satisfied according to the measurement result of the reference signal and the beam spreading factor. In the case of triggering conditions, control the transceiver unit to send the measurement report to the access network device, where the event triggering conditions include one or more of the following:

The RSRP adjustment value of the reference signal is higher than a threshold value, and the RSRP adjustment value of the reference signal is obtained by adjusting the RSRP of the reference signal by using the beam spreading factor corresponding to the reference signal; or,

The reference signal includes a first reference signal from a first station and a second reference signal from another station, and the RSRP adjustment value of the first reference signal is higher than the RSRP adjustment value of the second reference signal , Wherein the adjustment value of the RSRP of the first reference signal is obtained by adjusting the RSRP of the first reference signal by using the first beam spreading factor corresponding to the first reference signal, and the value of the second reference signal is The RSRP adjustment value is obtained by adjusting the RSRP of the second reference signal by adjusting the second beam spreading factor corresponding to the second reference signal.
The communication device according to any one of claims 19-28, wherein the beam spreading factor is determined according to the following parameters:

The ratio or difference between the number of antenna elements activated when the access network device sends the reference signal corresponding to the beam used for beam scanning and the number of antenna elements activated when the access network device sends the reference signal corresponding to the beam used for data transmission; or ；

The ratio or difference between the number of radio frequency channels when the access network device sends the reference signal corresponding to the beam used for beam scanning and the number of radio frequency channels activated when the access network device sends the reference signal corresponding to the beam used for data transmission; or,

The ratio or difference of the transmission power when the access network device sends the reference signal corresponding to the beam used for beam scanning and the transmission power when the access network device sends the reference signal corresponding to the beam used for data transmission.
A communication device, characterized in that it comprises:

The transceiver unit is configured to receive a measurement report from a terminal device, the measurement report containing one or more reference signal identifiers, wherein the measurement report is a reference from the access network device that the terminal device measures according to A measurement result obtained by a signal and a beam spreading factor, where the beam spreading factor is used to adjust the measurement result of the reference signal;

The processing unit is configured to provide the terminal device with a service beam for data transmission according to the measurement report.
The communication device according to claim 30, wherein the transceiving unit is further configured to:

Sending configuration information to the terminal device, where the configuration information includes the beam spreading factor information.
The communication device according to claim 31, wherein the configuration information includes information about an expansion factor, including:

The configuration information includes one or more beam spreading factors, and each beam spreading factor corresponds to a reference signal, where each beam spreading factor is used to adjust the measurement result of the corresponding reference signal; or,

The configuration information includes one or more beam spreading factors, each beam spreading factor corresponds to a reference signal set, and each beam spreading factor is used to adjust the measurement result of any reference signal in the corresponding reference signal set.
The communication device according to any one of claims 30-32, wherein the measurement report further includes an adjustment value of the measurement result of the reference signal corresponding to each reference signal identifier, wherein the reference The adjustment value of the measurement result of the signal is obtained by adjusting the measurement result of the reference signal according to the beam spreading factor corresponding to the reference signal.
The communication device according to any one of claims 30-33, wherein the transceiving unit is further configured to receive capability information from the terminal device, and the capability information is used to indicate whether the terminal device Support for selecting a reference signal based on the beam spreading factor.
The communication device according to any one of claims 30-34, wherein the transceiver unit is configured to:

At least two reference signals are sent, where the at least two reference signals include the first reference signal sent by the access network device through the first station and the second reference signal sent through the second station, where the at least two reference signals The beams corresponding to the signals are used for beam scanning;

Receiving a measurement report from the terminal device, the measurement report including an identifier of the first reference signal;

The processing unit is configured to control the transceiver unit to send a third reference signal to the terminal device according to the identifier of the first reference signal included in the measurement report, wherein the beam corresponding to the third reference signal As a service beam used for data transmission of the terminal device.
The communication device according to any one of claims 30-34, wherein the transceiver unit is further configured to:

Sending at least two reference signals, and beams corresponding to each of the at least two reference signals are used for beam scanning, wherein the at least two reference signals include a fourth reference signal;

Receiving measurement reports from at least two terminal devices, where the measurement reports of the at least two terminal devices each include the identifier of the fourth reference signal;

And, the processing unit is further configured to provide the transmission beam corresponding to the fourth reference signal as the service beam of the at least two terminal devices, and silence other transmission beams.
A communication device, characterized by comprising a processor and an interface circuit, the interface circuit is used to receive computer codes or instructions, and transmit them to the processor, the processor runs the computer codes or instructions, as in the right The method described in any one of claims 1-11 is executed.
A communication device, characterized by comprising a processor and an interface circuit, the interface circuit is used to receive computer codes or instructions, and transmit them to the processor, the processor runs the computer codes or instructions, as in the right The method described in any one of requirements 12-18 is executed.
A communication device, characterized in that it comprises at least one processor, the at least one processor is coupled with at least one memory, and the at least one processor is used to execute a computer program or instruction stored in the at least one memory, as in the right The method described in any one of claims 1-11 is executed.
A communication device, characterized in that it comprises at least one processor, the at least one processor is coupled with at least one memory, and the at least one processor is used to execute a computer program or instruction stored in the at least one memory, as in the right The method described in any one of requirements 12-18 is executed.
A computer-readable storage medium, wherein computer instructions are stored in the computer-readable storage medium, and when the computer instructions are run on a computer, the method according to any one of claims 1-11 Be executed.
A computer-readable storage medium, characterized in that computer instructions are stored in the computer-readable storage medium, and when the computer instructions are run on a computer, the method according to any one of claims 12-18 Be executed.