CN115244961B

CN115244961B - Method for selecting beam and communication device

Info

Publication number: CN115244961B
Application number: CN202080098162.7A
Authority: CN
Inventors: 管鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2024-01-05
Anticipated expiration: 2040-03-13
Also published as: CN115244961A; WO2021179316A1

Abstract

The network side indicates the network equipment to provide the beam for data transmission with higher beam gain on the basis of providing the beam for beam scanning by configuring the beam expansion factor for the terminal equipment, so that the terminal equipment can assist the terminal equipment to select a station capable of providing the beam with higher data transmission rate in the process of selecting the service beam by considering the measurement result of the reference signal corresponding to the beam for beam scanning and the factor of the beam expansion factor.

Description

Method for selecting beam and communication device

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a method and a communications apparatus for selecting a beam.

Background

In a wireless communication system, in order to overcome the path loss, both a network device and a terminal device typically use an antenna array with high gain and directivity to form an analog beam for communication. The analog beam is directional, the narrower the beam width, the greater the antenna gain. The network device and the terminal device may transmit and receive towards a particular discovery. Taking downlink communication as an example, the network device transmits in a specific direction, the terminal device receives in a specific direction, and normal communication can be realized when the directions of transmission and reception are aligned. In order to achieve alignment of the beams, beam training is required.

The downlink beam training is mainly realized by the terminal equipment through measurement and feedback of downlink reference signals. The network device uses different transmission beams to transmit different downlink reference signals, configures the terminal device to measure the quality of a specific downlink reference signal, for example, reference signal received power (reference signal receiving power, RSRP) or signal-to-interference-plus-noise ratio (signal to interference and noise ratio, SINR), and requires the terminal device to select a plurality of suitable downlink reference signals by itself, and reports the corresponding identifiers and quality.

In the existing schemes, the terminal devices basically select beams based on the quality of the reference signals. However, in practical applications, the better the quality of the reference signal, in many scenarios, it is not an indication that the beam is the optimal beam. The terminal device often selects a beam according to the quality of the reference signal, which is instead not the optimal beam for data transmission. Thus, this method of beam selection is disadvantageous for data transmission.

Disclosure of Invention

The application provides a method for selecting a beam, access network equipment and terminal equipment, which can assist the terminal equipment to select the beam favorable for data transmission.

In a first aspect, the present application provides a method of selecting a beam, the method comprising: the terminal equipment measures a reference signal from the access network equipment to obtain a measurement result of the reference signal; the terminal equipment sends a measurement report, wherein the measurement report comprises one or more reference signal identifiers, the reference signals corresponding to the one or more reference signal identifiers are determined according to a beam expansion factor and the measurement results of the reference signals, and the beam expansion factor is used for adjusting the measurement results of the reference signals.

The network side informs the terminal device that the beam with higher beam gain can be provided for data transmission on the basis of providing the beam for beam scanning by configuring the beam expansion factor for the terminal device. The terminal device adjusts the measurement result of the reference signal corresponding to the beam used for beam scanning according to the beam expansion factor, so that the terminal device can be assisted in selecting a station or a beam capable of providing a higher data transmission rate, and data transmission is facilitated.

In the embodiment of the present application, the reference signals corresponding to the beams for beam scanning are referred to as first-type reference signals, and the reference signals corresponding to the beams for data transmission are referred to as second-type reference signals.

With reference to the first aspect, in an embodiment of the first aspect, the method further includes: the terminal equipment receives configuration information from the access network equipment, wherein the configuration information comprises the information of the beam expansion factor.

The access network device can align the principles of the network side and the terminal device on the beam gain, the beam measurement behavior and the beam selection method by sending configuration information to the terminal device, so that the adaptation of the beam is avoided, and the performance of beam selection can be improved.

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, the capability information being used to instruct the terminal device to support selection of the reference signal based on the beam expansion factor.

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

The configuration information comprises one or more beam expansion factors, each beam expansion factor corresponds to one reference signal set, and each beam expansion factor is used for adjusting the measurement result of any one reference signal in the corresponding reference signal set.

The access network device may implement different requirements for beam selection by configuring beam expansion factors with different granularities, for example, granularity with reference signals, granularity with a set of reference signals, or the like. In some scenes, the beam expansion factors with smaller granularity are configured, so that the fine control on the beam selection can be realized, and the smaller the granularity is, the finer the control is. In some scenarios, the beam expansion factors with larger granularity are configured, so that the performance requirement of beam selection can be met, and unnecessary signaling overhead can be avoided. 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 a measurement result of the reference signal corresponding to the each reference signal identifier, where the adjustment value of the measurement result of the reference signal is obtained by adjusting the measurement result of the reference signal according to a beam expansion 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 a reference signal from the access network device to obtain the measurement result of the reference signal, including:

the terminal equipment measures at least two reference signals from the access network equipment to obtain the RSRP of each of the at least two reference signals;

the terminal device sends a measurement report, wherein the measurement report comprises one or more reference signal identifiers and comprises:

the terminal equipment determines that a first reference signal in the at least two reference signals is from a first station and a second reference signal in the at least two reference signals is from a second station according to the association relation between the reference signal identification and the station number, wherein the second station is a service station of the terminal equipment, and beams corresponding to the first reference signal and the second reference signal are used for beam scanning;

the terminal equipment sends the measurement report to the access network equipment according to the RSRP of the first reference signal and the second reference signal and the beam expansion factors corresponding to the first reference signal and the second reference signal respectively under the condition that the triggering condition is met, wherein the measurement report comprises the identification of the first reference signal, and the triggering condition is as follows:

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

The terminal equipment adjusts the measured result of the measured reference signal for beam scanning according to the beam expansion factor configured by the network side, thereby being beneficial to selecting a station capable of providing higher beam gain for the terminal equipment. In case the adjustment value of the RSRP of the first reference signal sent by the first station is higher than the RSRP of the current serving station (i.e. the second station) or the adjustment value thereof, it is indicated that the first station has the capability to provide the terminal device with other beams having a beam gain higher than the beam corresponding to the first reference signal. Therefore, the terminal equipment reports the measurement report containing the identification of the first reference signal, can switch to a station which is more beneficial to data transmission, and improves 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 equipment receives a third reference signal from the access network equipment, a beam corresponding to the third reference signal is provided by the first station, the beam corresponding to the third reference signal is used for data transmission, the gain of the beam corresponding to the third reference signal, which is sent to the terminal equipment by the first station, is higher than the gain of the beam corresponding to the first reference signal, which is sent to the terminal equipment by the first station, and the gain of the beam corresponding to the third reference signal, which is sent to the terminal equipment by the first station, is higher than the gain of the beam corresponding to the second reference signal, which is sent to the terminal equipment by the second station.

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

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

the method comprises the steps that terminal equipment measures at least two reference signals from access network equipment to obtain measurement results of the at least two reference signals, beams corresponding to the at least two reference signals are used for beam scanning, and the at least two reference signals comprise a fourth reference signal;

the terminal equipment sends the measurement report under the condition that a triggering condition is met, wherein the measurement report comprises the identification of the fourth reference signal, and the triggering condition is as follows:

the adjustment value of the RSRP of the fourth reference signal is higher than the RSRP of the other reference signal of the at least two reference signals or the adjustment 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 if the trigger condition is met, the method further includes: the terminal equipment uses the 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 equipment, the measurement reports of at least two terminal equipment received by the access network equipment contain the identification of the fourth reference signal, and the beam corresponding to the fourth reference signal is used as the service beam of the at least two terminal equipment.

The beam expansion 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 expansion factor, and the reference signal is selected according to the adjustment value to report the measurement report to the access network device. The access network device can provide a service beam capable of maximizing the cell capacity according to the measurement reports reported by the plurality of terminal devices based on the beam expansion factors.

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: and the terminal equipment sends the measurement report to the access network equipment according to the measurement result of the reference signal and the beam expansion factor under the condition that the event triggering condition is met, wherein the event triggering condition comprises one or more of the following:

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

the reference signals comprise a first reference signal from a first station and a second reference signal from other stations, wherein the adjustment value of the RSRP of the first reference signal is higher than that of the second reference signal, the adjustment value of the RSRP of the first reference signal is obtained by adjusting the RSRP of the first reference signal by adopting a first beam expansion factor corresponding to the first reference signal, and the adjustment value of the RSRP of the second reference signal is obtained by adjusting the RSRP of the second reference signal by adopting a second beam expansion factor corresponding to the second reference signal.

With reference to the first aspect, in another embodiment of the first aspect, the beam expansion factor is determined according to the following parameters: the ratio or the difference of the number of the antenna array elements activated when the access network equipment sends the reference signal corresponding to the wave beam for wave beam scanning and the number of the antenna array elements activated when the access network equipment sends the reference signal corresponding to the wave beam for data transmission; or alternatively; the ratio or the difference of the number of the radio frequency channels when the access network equipment sends the reference signals corresponding to the wave beams for wave beam scanning and the number of the radio frequency channels activated when the access network equipment sends the reference signals corresponding to the wave beams for data transmission; or, the ratio or the difference between the transmission power when the access network device transmits the reference signal corresponding to the beam for beam scanning and the transmission power when the access network device transmits the reference signal corresponding to the beam for data transmission.

In a second aspect, the present application provides a method of selecting a beam, the method comprising: the method comprises the steps that an access network device receives a measurement report from a terminal device, wherein the measurement report comprises one or more reference signal identifiers, the measurement report is obtained by the terminal device according to a measurement result obtained by measuring a reference signal from the access network device and a beam expansion factor, and the beam expansion factor is used for adjusting the measurement result of the reference signal; the access network equipment provides a service beam for data transmission for the terminal equipment according to the measurement report.

The network side informs the terminal device that the beam with higher beam gain can be provided for data transmission on the basis of providing the beam for beam scanning by configuring the beam expansion factor for the terminal device. The terminal equipment adjusts the measurement result of the reference signal corresponding to the beam for beam scanning according to the beam expansion factor, and selects the reference signal to report according to the adjustment value of the measurement result, so that the terminal equipment can be assisted in selecting a station capable of providing a higher data transmission rate, and the data transmission is facilitated.

With reference to the second aspect, in one 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, wherein the configuration information comprises the information of the beam expansion factor.

With reference to the second aspect, in another embodiment of the second aspect, the configuration information includes information of a spreading factor, including: the configuration information comprises one or more beam expansion factors, wherein each beam expansion factor corresponds to one reference signal, and each beam expansion factor is used for adjusting 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 a measurement result of the reference signal corresponding to each reference signal identifier, where the adjustment value of the measurement result of the reference signal is obtained by adjusting the measurement result of the reference signal according to a beam expansion 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, the capability information being used to indicate whether the terminal device supports selecting the reference signal based on the beam expansion 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 method comprises the steps that an access network device sends at least two reference signals, wherein the at least two reference signals comprise a first reference signal sent by the access network device through a first station and a second reference signal sent by the access network device through a second station, and beams corresponding to the at least two reference signals are used for beam scanning; the access network device receives a measurement report from the terminal device, and the method comprises the following steps: the method comprises the steps that an access network device receives a measurement report from a terminal device, wherein the measurement report comprises an identifier of a first reference signal; the access network equipment provides a service beam for data transmission for the terminal equipment according to the measurement report, and the method comprises the following steps: and the access network equipment sends a third reference signal to the terminal equipment through the first station according to the identifier of the first reference signal contained in the measurement report, wherein a beam corresponding to the third reference signal is used as a service beam for data transmission of the terminal equipment.

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 method comprises the steps that an access network device sends at least two reference signals, beams corresponding to the at least two reference signals are used for beam scanning, and the at least two reference signals comprise a fourth reference signal; the access network device receives a measurement report from the terminal device, and the method comprises the following steps: the method comprises the steps that an access network device receives measurement reports from at least two terminal devices, wherein the measurement reports of the at least two terminal devices all contain identifiers of fourth reference signals; and the access network equipment provides the sending beam corresponding to the fourth reference signal as the service beam of the at least two terminal equipment and quiets other sending beams.

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

the ratio or the difference of the number of the antenna array elements activated when the access network equipment sends the reference signal corresponding to the wave beam for wave beam scanning and the number of the antenna array elements activated when the access network equipment sends the reference signal corresponding to the wave beam for data transmission; or alternatively;

The ratio or the difference of the number of the radio frequency channels when the access network equipment sends the reference signals corresponding to the wave beams for wave beam scanning and the number of the radio frequency channels activated when the access network equipment sends the reference signals corresponding to the wave beams for data transmission; or,

the ratio or the difference between the transmission power when the access network device transmits the reference signal corresponding to the beam for beam scanning and the transmission power when the access network device transmits the reference signal corresponding to the beam for data transmission.

The technical effects of each technical scheme on the network side can be referred to the description of the corresponding scheme on the terminal side, and will not be repeated.

In a third aspect, the present application provides a method of selecting a beam, the method comprising: the terminal equipment receives configuration information from the access network equipment, wherein the configuration information comprises information of beam expansion factors of one or more first type reference signals, and beams corresponding to the first type reference signals are used for beam scanning;

the method comprises the steps that terminal equipment measures M first type reference signals from access network equipment to obtain measurement results of the M first type reference signals, wherein M is more than or equal to 1, and M is an integer;

the terminal equipment sends a measurement report, wherein the measurement report comprises N reference signal identifiers which are respectively used for identifying N first type reference signals, the N first type reference signals are selected from the M first type reference signals according to the information of the beam expansion factors and the measurement results of the M first type reference signals, the N first type reference signals belong to the M first type reference signals, and N is more than or equal to 1, N is less than or equal to M and is an integer.

With reference to the third aspect, in certain implementations of the third aspect, after the terminal device sends the measurement report, the method further includes: the terminal equipment receives second-type reference signals from the access network equipment, wherein beams corresponding to the second-type reference signals are used for data transmission.

With reference to the third aspect, in certain implementations of the third aspect, the method further includes: the terminal device sends capability information to the access network device, the capability information being used to instruct the terminal device to support selection of the first type of reference signals based on the beam expansion factor.

With reference to the third aspect, in certain implementations of the third aspect, the configuration information includes information of a spreading factor, including: the configuration information comprises one or more beam expansion factors, wherein each beam expansion factor corresponds to one first type of reference signal, and each beam expansion factor is used for adjusting the measurement result of the corresponding first type of reference signal; or,

the configuration information comprises one or more beam expansion factors, each beam expansion factor corresponds to one first type reference signal set, and each beam expansion factor is used for adjusting the measurement result of any one first type reference signal in the corresponding first type reference signal set.

With reference to the third aspect, in some implementations of the third aspect, the sending, by the terminal device, a measurement report to the access network device includes: and the terminal equipment sends a measurement report to the access network equipment under the condition that the event triggering condition is met, wherein the event triggering condition comprises one or more of the following:

the adjustment value of the RSRP of one or more first type reference signals in the M first type reference signals is higher than a threshold value, and the adjustment value of the RSRP of the first type reference signals is obtained by adjusting the RSRP of the first type reference signals by adopting beam expansion factors corresponding to the first type reference signals; or,

the M first type reference signals comprise first type reference signals from a first station and first type reference signals from other stations, wherein the adjustment value of the RSRP of the first reference signals in the first type reference signals from the first station is higher than the adjustment value of the RSRP of the second reference signals in the first type reference signals from the second station, the adjustment value of the RSRP of the first reference signals is obtained by adjusting the RSRP of the first reference signals by adopting a first beam expansion factor corresponding to the first reference signals, and the adjustment value of the RSRP of the second reference signals is obtained by adjusting the RSRP of the second reference signals by adopting a second beam expansion factor corresponding to the second reference signals.

With reference to the third aspect, in some implementations of the third aspect, the measurement report further includes adjustment values of measurement results of each of the N first type reference signals, where the adjustment values of measurement results of each of the N first type reference signals are adjusted according to measurement results of the corresponding beam expansion factor for the first type reference signals.

With reference to the third aspect, in certain implementations of the third aspect, the beam expansion factor is determined according to the following parameters:

the ratio or the difference of the number of the antenna array elements activated when the access network equipment sends the first type of reference signals and the number of the antenna array elements activated when the access network equipment sends the second type of reference signals; or alternatively;

the ratio or the difference of the number of the radio frequency channels when the access network equipment sends the first type of reference signals and the number of the activated radio frequency channels when the access network equipment sends the second type of reference signals; or,

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

In a fourth aspect, the present application provides a method for selecting an access network based on a beam, including: the method comprises the steps that a terminal device measures a broadcast signal from an access network device, wherein the broadcast signal carries configuration information of a beam expansion factor of a reference signal, and the beam expansion factor of the reference signal is used for adjusting a measurement result of the reference signal;

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

the terminal equipment selects a first Random Access Channel (RACH) resource to access the access network equipment, wherein the first RACH resource is associated with a beam corresponding to a first reference signal in 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 or the adjustment value of the measurement result of other reference signals in the at least two reference signals, wherein the adjustment value of the measurement result of each reference signal is obtained by adjusting the measurement result of the reference signal according to a beam expansion factor corresponding to the reference signal.

And the terminal equipment adjusts the measured results of the measured reference signals according to the beam expansion factors, selects beams according to the adjustment values, and further uses RACH resources corresponding to the selected beams to access the network. The performance of the wave beam selected based on the adjustment value is higher, so that the probability of success of random access can be improved, and the random access quality is improved.

In a fifth aspect, a communication device is provided, which has the functionality to implement the method in the first aspect or any possible implementation manner thereof, or which has the functionality to implement the method in the third aspect or any possible implementation manner thereof, which has the functionality to implement the method in the fourth aspect or any possible implementation manner thereof, which may be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions.

In a sixth aspect, a communication device is provided, which has the functionality to implement the method of the second aspect or any possible implementation manner thereof, where the functionality may be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions.

In a seventh aspect, the present application provides a terminal device comprising a processor, a memory, and a transceiver. Wherein the memory is for storing a computer program, the processor is for calling and running the computer program stored in the memory and controlling the transceiver to transceive signals to cause the terminal device to perform the method as in the first aspect or any of its possible implementations or to cause the terminal device to perform the method as in the third aspect or any of its possible implementations to cause the terminal device to perform the method as in the fourth aspect or any of its possible implementations.

In an eighth aspect, the present application provides a network device comprising a processor, a memory, and a transceiver. Wherein the memory is for storing a computer program and the processor is for invoking and running the computer program stored in the memory and controlling the transceiver to transceive signals to cause the network device to perform the method as in the second aspect or any possible implementation thereof.

In a ninth aspect, the present application provides a computer readable storage medium having stored therein computer instructions which, when run on a computer, cause a method as in the first aspect or any of its possible implementations to be performed, or cause a method as in the third aspect or any of its possible implementations to be performed, or cause a method as in the fourth aspect or any of its possible implementations to be performed.

In a tenth aspect, the present application provides a computer readable storage medium having stored therein computer instructions which, when run on a computer, cause the method as in the second aspect or any possible implementation thereof to be performed.

In an eleventh aspect, the present application provides a computer program product comprising computer program code which, when run on a computer, causes a method as in the first aspect or any of its possible implementations to be performed, or causes a method as in the third aspect or any of its possible implementations to be performed.

In a twelfth aspect, the present application provides a computer program product comprising computer program code which, when run on a computer, causes the method as in the second aspect or any possible implementation thereof to be performed.

In a thirteenth aspect, the present application provides a chip comprising a processor and a communication interface for receiving signals and transmitting said signals to the processor, the processor processing the signals such that the method as in the first aspect or any possible implementation thereof is performed, or such that the method as in the third aspect or any possible implementation thereof is performed, or such that the method as in the fourth aspect or any possible implementation thereof is performed.

Alternatively, the communication interface may be an interface circuit.

In a fourteenth aspect, the present application provides a chip comprising a processor and a communication interface for receiving signals and transmitting said signals to said processor, said processor processing said signals such that the method as in the second aspect or any possible implementation thereof is performed.

Alternatively, the communication interface may be an interface circuit.

In a fifteenth aspect, the present application provides a wireless communication system comprising a terminal device according to the fifth aspect and a network device according to the sixth aspect.

Drawings

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

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

Fig. 3 shows a schematic diagram of the transmit beam of a station without precise alignment capability.

Fig. 4 is a schematic flow chart of a method of selecting a beam provided herein.

Fig. 5 is a schematic diagram of a scenario in which a UE performs station switching or beam switching.

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

Fig. 7 is an example of a method of selecting a beam provided herein.

Fig. 8 is another schematic flow chart of a method of selecting a beam provided herein.

Fig. 9 is another example of a method of selecting a beam provided herein.

Fig. 10 is a schematic block diagram of a communication device provided herein.

Fig. 11 is a schematic block diagram of a communication device provided herein.

Fig. 12 is a schematic structural diagram of the communication device 10 provided in the present application.

Fig. 13 is a schematic structural diagram of the communication device 20 provided in the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

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

The terminal device in the embodiments of the present application may refer to a user device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user apparatus. The terminal device may also be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a car-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in other communication system, etc., without limitation.

The radio access network device in the embodiment of the present application may be any device having a radio transceiver function. The access network devices include, but are not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), an Access Point (AP), a wireless relay Node, a wireless backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP), etc., may also be a gNB or a transmission point in a 5G system, or may also be a network Node constituting a gNB or a transmission point, for example, a baseband unit (building baseband unit, BBU) or a Distributed Unit (DU), etc.

Furthermore, some terms or techniques referred to in the embodiments of the present application are briefly described below.

1. Beam (beam).

The beam may be embodied in the NR protocol as a spatial filter (spatial domain filter), or spatial filter, or spatial parameter (spatial parameter). The beam used to transmit the signal may be referred to as a transmit beam (transmission beam, tx beam), may be referred to as a spatial transmit filter (spatial domain transmission filter) or spatial transmit parameters (spatial transmission parameter); the beam used to receive the signal may be referred to as a receive beam (Rx beam), may be referred to as a spatial receive filter (spatial domain receive filter) or spatial receive parameters (spatial RX parameter).

The transmit beam may refer to a distribution of signal strengths formed in spatially different directions after signals are transmitted through the antennas, and the receive beam may refer to a distribution of signal strengths of wireless signals received from the antennas in spatially different directions.

Furthermore, the beam may be a wide beam, or a narrow beam, or other type of beam. The technique of forming the beam may be a beamforming technique or other technique. The beamforming technique may specifically be a digital beamforming technique, an analog beamforming technique, or a hybrid digital/analog beamforming technique, etc.

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

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

Alternatively, a plurality of beams having the same or similar communication characteristics are regarded as one beam. One beam may be transmitted through one or more antenna ports for transmitting data channels, control channels, and sounding signals, etc. One or more antenna ports forming a beam may also be considered as a set of antenna ports.

In beam measurement, each beam of the network device corresponds to a resource, and thus the beam to which the resource corresponds may be indicated by an index or identification of the resource.

2. A resource.

In beam measurement, a beam to which a resource corresponds may be uniquely identified by an index of the resource. The resource may be an uplink signal resource or a downlink signal resource. The uplink signals include, but are not limited to, sounding reference signals (sounding reference signal, SRS), demodulation reference signals (demodulation reference signal, DMRS).

The downlink signals include, but are not limited to: channel state information reference signals (channel state information reference signal, CSI-RS), cell specific reference signals (cell specific reference signal, CS-RS), UE specific reference signals (user equipment specific reference signal, US-RS), demodulation reference signals (demodulation reference signal, DMRS), and synchronization signals/physical broadcast channel blocks (synchronization system/physical broadcast channel block, SS/PBCH block). Wherein SS/PBCH block may be simply referred to as a synchronization signal block (synchronization signal block, SSB).

The resources are configured by radio resource control signaling (radio resource control, RRC) signaling. In the configuration structure, a resource is a data structure, which includes relevant parameters of the corresponding uplink/downlink signals, such as the type of the uplink/downlink signals, resource grains carrying the uplink/downlink signals, the sending time and period of the uplink/downlink signals, the number of ports used for sending the uplink/downlink signals, and the like. The resources of each uplink/downlink signal have a unique index to identify the resources of the downlink signal. It will be appreciated that the index of a resource may also be referred to as an identification of the resource, which embodiments of the present application do not impose any limitation.

3、TCI state：

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

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

The QCL type division may be as follows:

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

QCL typeB: doppler shift, doppler spread;

QCL typeC: delay, doppler shift;

QCL typeD: spatial domain reception parameters, i.e. the reception beam.

4. Quasi co-location (QCL).

The co-ordination relationship is used to indicate that the plurality of resources have one or more identical or similar communication characteristics therebetween, and the same or similar communication configuration may be employed for the plurality of resources having the co-ordination relationship. For example, if two antenna ports have a co-located relationship, the channel large-scale characteristics of one port transmitting one symbol can be inferred from the channel large-scale characteristics of the other port transmitting one symbol. The large scale characteristics may include: delay spread, average delay, doppler spread, doppler shift, average gain, reception parameters, terminal reception beam number, transmit/receive channel correlation, reception angle of arrival, spatial correlation of receiver antennas, angle of main-arrival (AoA), average angle of arrival, extension of AoA, etc. The parameters of quasi co-location include: at least one of doppler spread, doppler shift, average delay, delay spread and spatial domain receive parameters. QCL relationships can be divided into four classes: QCL-TypeA: { Doppler shift, doppler spread, average delay, delay spread }; QCL-TypeB: { Doppler shift, doppler spread }; QCL-TypeC: { Doppler shift, average delay }; QCL-TypeD: { spatial domain reception parameters }.

5. Spatial Relationship (SR).

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

Each spatial relationship may include an index (ServCellIndex) of a serving cell and a reference signal resource identification. The reference signal resource identifier may be any one 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 identity (non-zero power-channel state information-resource identifier, NZP-CSI-RS-resource ID), or uplink BWP ID and SRS resource identity (SRS-resource ID).

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 transmit beam, i.e., an index of a serving cell, a BWP ID, and a reference signal resource may be used to determine a transmit beam. The terminal device may maintain the index of the serving cell, the BWP ID, and the corresponding relation between the reference signal resource identifier and the transmit beam during the beam training process, and the network device may maintain the index of the serving cell, the BWP ID, and the corresponding relation between the reference signal resource identifier and the receive beam during the beam training process. By referring to the signal resource identification, a pairing relationship between the transmit beam and the receive beam can be established.

In the course of the communication thereafter, the terminal device may determine the transmit beam based on the spatial relationship indicated by the network device, and the network device may determine the receive 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 desired received power, the path loss reference signal, and the path loss compensation parameter α. The terminal device may determine which transmit power to use for transmitting the uplink signal based on the power control information.

In addition, the spatial relationships may be globally configured. In the spatial relationship configured for different cells and different BWP, if the spatial relationship identifiers are the same, the corresponding spatial relationship configurations are the same.

6. Spatial relationship indication (spatial relation indicator, SRI).

SRI may be used to indicate spatial relationships.

In one implementation, the network device may configure a spatial relationship list for the terminal device through higher layer signaling (e.g., RRC messages), where the spatial relationship list may include a plurality of spatial relationships, e.g., the network device may configure up to 64 spatial relationships per BWP per cell.

Thereafter, the network device may activate one or more spatial relationships through higher layer signaling (e.g., MAC CE). The activated spatial relationship is a subset of the list of spatial relationships configured by the RRC message described above. For example, the network device may activate up to 8 TCI states for each BWP in each cell. The specific manner in which the network device activates the TCI state through the MAC CE is the same as the specific manner in which the TCI state is activated, which has been described in detail above, and for brevity, will not be described here again. Based on the activation of the MAC CE, the terminal device may determine a mapping relationship of the at least one SRI to the at least one spatial relationship. The specific form of the mapping relationship may be similar to that shown in table 1 above, for example, and will not be illustrated here for brevity.

Thereafter, the network device may indicate a selected spatial relationship via an SRI field in physical layer signaling (e.g., DCI). The DCI may be, for example, DCI for scheduling an uplink grant (UL grant). The terminal device may determine the selected spatial relationship based on the mapping relationship of the at least one SRI and the at least one spatial relationship described above and the received SRI.

Similar to the downlink TCI, configuration information for one spatial relationship may include an identification of one or two reference signal resources, and an associated QCL type. When the QCL relationship is configured as one of the types a, B, or C, the terminal device may 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 receive beam the network device uses to receive the signal, and can then determine which transmit beam to use to transmit the signal based on the beam pairing relationship determined by the channel measurements described above.

Furthermore, the configuration information of one spatial relationship may include an identification of one or two reference signal resources, and associated spatial filters. For example, when an SSB index is configured in a spatial relationship, the terminal device may transmit a signal through a 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 during beam training.

The terminal device may determine a transmit beam to transmit a physical uplink shared channel (physical uplink shared channel, PUSCH) according to an SRI field in DCI on the PDCCH.

7. Downlink beam training and uplink beam training.

The downlink beam training is mainly realized through measurement and feedback of downlink signals, and a base station can be considered to use different transmission beams to transmit SSB and/or CSI-RS with different numbers, wherein the numbers of the transmission beams and the SSB or the CSI-RS can be in one-to-one correspondence relationship, or in one-to-many, many-to-one or many-to-many relationship. The base station configures the terminal to measure L1 layer reference signal received power (reference signal receiving power, L1 layer reference signal received power) or L1 layer signal to interference plus noise ratio (signal to interference plus noise ratio, L1-SINR) for a specific one or more SSB or CSI-RS, and requires the terminal to select N proper 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 for measurement and may attempt different receive beams. If the downlink signal is non-periodic, e.g., disposable, the terminal may measure on the receive beam indicated by the base station or may select the receive beam itself.

Uplink beam training is mainly achieved by the base station configuring the terminal to transmit uplink measurement signals (e.g., SRS). The terminal may be considered to transmit differently numbered SRS using different transmit beams, where there may be a one-to-one, one-to-many, many-to-one, or many-to-many relationship between transmit beams and SRS numbers. The base station selects an appropriate transmit beam for the terminal by measuring the quality of the different SRS. The base station may attempt different receive beams at the time of measurement. If the uplink signal is periodic or semi-continuous, the base station has multiple opportunities for measurement so that different receive beams can be tried. The base station may also select the receive beam itself if the uplink signal is non-periodic.

8. And (5) estimating the path loss.

In cellular network communication, parameters for determining the uplink transmit power of a terminal device are configured by a network device. The purpose of the uplink power control is to make the power of the signal sent by the terminal device when reaching the network device meet the receiving condition of the network device. For example, the network device requires the power of the signal transmitted by the terminal device to reach the network device to be P0. Since the distance between each terminal device and the network device is different, the terminal device needs to estimate Path Loss (PL) in signal transmission to adjust uplink transmission power. The path loss is simply referred to as "path loss", and the path loss estimation is simply referred to as "path loss estimation".

The path loss estimation is typically achieved by the terminal device measuring the received power of a network device configured path loss estimation reference signal (pathloss reference signal, PL RS). In short, the path loss estimation value=pl RS transmission power-PL RS reception power, and the uplink transmission power of the terminal device=p0+path loss estimation value. Wherein, the transmission power and P0 of the network device are configured by the network device.

9. -a path loss reference signal (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 may adjust the transmission power based on the path loss estimation value obtained above. In order to obtain the path loss estimate, the network device needs to configure the PL RS for the terminal device to track (track). The tracking includes periodic measurements and maintenance of path loss measurements corresponding to each PL RS. It should be understood that PL RS is a periodic reference signal, PL RS is a generic term for reference signals used for path loss estimation, and the reference signals used for path loss estimation may be, for example: a synchronization signal block (SS/PBCH block, SSB) or a channel state information reference signal (channel status information reference signal, CSI-RS). In other words, reference signals configured by the network device for the terminal device for path loss estimation are referred to herein as PL RSs.

10. A cell (cell).

The cells are described by a higher layer from the point of view of resource management or mobility management or service units. The coverage area of each network device may be divided into one or more serving cells, and the serving cells may be regarded as being composed of certain frequency domain resources. In the embodiment of the present application, the cell may be replaced by a serving cell or CC. In the present embodiment, "cell", "serving cell" and "CC" are used interchangeably and their intended meaning is consistent when de-emphasizing their distinction. Similarly, "index of a serving cell", "Identification (ID) of a serving cell", "cell identification (cell ID)" and "CC identification (CC ID)" are used interchangeably, and the meaning to be expressed is consistent when the distinction is not emphasized.

The following describes the technical scheme of the present application.

Referring to fig. 1, fig. 1 is an architecture of a communication system suitable for use in embodiments of the present application. As shown in fig. 1, the wireless communication system 100 may include at least one network device 101, where the network device 101 may be in wireless communication with one or more terminal devices (e.g., terminal device 102 and 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 may obtain one or more beam pairs with better communication through a beam management procedure, and the beam pairs may be denoted as (Bx, B 'x) and (By, B' y). Where Bx represents the transmit beam of network device 101, B 'x represents the receive beam of terminal device 102, by represents the transmit beam of terminal device 102, and B' y represents the receive beam of network device 101. As shown in fig. 1, a transmission beam #1 of the network device 101 and a reception beam #0 of the terminal device are one beam pair, and a transmission beam #2 of the network device and a reception beam #2 of the terminal device are one beam pair. The transmission beam #0 of the terminal device and the reception beam #1 of the network device are one beam pair, and the transmission beam #1 of the terminal device and the reception beam #2 of the network device are one beam pair.

The beam alignment of the terminal device 102 and the network device 101 enables normal communication. Since both the terminal device 102 and the network device 101 can each face multiple beam directions, a precondition for communication is beam alignment by beam training. For example, in downlink communications, the transmit beam of the network device and the receive beam of the terminal device are aligned by downlink beam training.

The technical scheme provided by the application can be applied to the scene that the terminal equipment selects the reference signal (namely, the wave beam).

The following describes the technical scheme of the present application.

For ease of understanding, related concepts or technologies related to the embodiments of the present application will be first described.

In a wireless communication system, an access network device is a logical concept, and an access network device may physically include a plurality of stations. Different stations have different beamforming algorithms and implementations. Stations can be roughly classified into two types according to the kind of transmission beam.

The beams transmitted by a class of stations for beam scanning are not the same as the beams used for data transmission. Such stations typically have high capabilities, generally considered to have precise alignment capabilities, as shown in fig. 2.

Referring to fig. 2, fig. 2 shows a schematic diagram of a transmit beam of a station with precise alignment capability. The first type of beam transmitted by a station is a beam used for beam scanning. These beams are visible to all UEs served by the station, i.e. considered to be common beams. In general, the common beam may be faster and have less beam gain, and after a particular UE performs beam selection by measuring the quality of one or more common beams and reporting the result of the selection to the access network device, the access network device may provide the particular UE with a narrower, higher beam gain dedicated beam for subsequent data transmission, such as the second type of beam shown in fig. 3. The access network equipment provides the second type of wave beam with higher wave beam gain for the UE to be used for data transmission, so that the data transmission rate can be improved. The specific implementation of this procedure may be implemented by an algorithm of the access network device, for example, the access network device may interpolate according to the beam information or the beam quality information reported by the UE.

The beam transmitted by another type of station for beam scanning is the same as the beam used for data transmission. Such stations are simpler to implement for providing beams to UEs, and typically stations directly employ the beams reported by the UEs for data transmission, such stations are not considered to have precise alignment capabilities, as shown in fig. 3.

Referring to fig. 3, fig. 3 shows a schematic diagram of a transmit beam of a station that does not have precise alignment capability. As in fig. 3, such stations transmit only one type of beam.

Considering that the situations of transmitting beams of different stations are different, the technical solution of the present application proposes that, for a station with accurate alignment capability, that is, a station with different analog beam forming of a beam for beam scanning and a beam for data transmission, the terminal device can be informed of its own capability of providing a beam with higher gain, so that the terminal device considers this factor when selecting a service beam, and even if some beam quality obtained by measurement of the terminal device is poor, the terminal device can select the station, thereby being beneficial to subsequent data transmission.

For convenience in description, reference signals corresponding to beams for beam scanning of each station are hereinafter referred to as first type reference signals, and reference signals corresponding to beams for data transmission are hereinafter referred to as second type reference signals. In other words, the beam used by each station to transmit the first type of reference signal belongs to the beam used for beam scanning, and the beam used by each station to transmit the second type of reference signal belongs to the beam used for data transmission.

Referring to fig. 4, fig. 4 is a schematic flow chart of a method of selecting a beam provided herein. The method 200 generally includes steps 210, 220, and 230. Optionally, 240 and/or 250 may also be included.

210. The terminal equipment measures one or more first type reference signals from the access network equipment to obtain measurement results of the one or more first type reference signals.

In some examples, the measurement of the first type of reference signal may be a reference signal received power (reference signal receiving power, RSRP), a reference signal received quality (reference signal receiving quality, RSRQ), a signal-to-interference-and-noise ratio (signal to interference and noise ratio, SINR), or the like.

As described above, an access network device is a logical concept, and an access network device may physically include multiple sites. Thus, the one or more first type reference signals from the access network device may be from one station, or may be from multiple stations, which is not limited. The terminal device does not distinguish from which station the measured first type of reference signal originates from, but considers that all originate from the access network device.

As some examples, the first type of reference signal in the embodiments 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 may refer to one of a channel state information reference signal (channel state information reference signal, CSI-RS) for beam management (for beam management), a CSI-RS for L1 layer reference signal received power (L1-RSRP) measurement, a CSI-RS for L1 layer signal to interference and noise ratio (L1-SINR) measurement, and a CSI-RS for mobility measurement (i.e., CSI-RS for mobility).

The first type of reference signal in the embodiments of the present application is distinguished from the second type of reference signal appearing below. The second type of reference signal will be described below.

220. The terminal device sends a measurement report containing one or more reference signal identities.

As an example, in embodiments of the present application, the terminal device selects, based on a selection principle of "select first type reference signal reporting with maximum adjustment value of RSRP", a first type reference signal to be reported from measured first type reference signals.

In addition, the terminal device may also be based on other selection principles, which are not limited herein. For example, the terminal device may select according to SINR of the first type of reference signal, or according to correlation of a beam corresponding to the first type of reference signal, or according to channel capacity of a beam corresponding to the first type of reference signal, or the like.

Each of the one or more reference signal identifiers corresponds to a first type of reference signal respectively, and the first type of reference signals corresponding to the one or more reference identifiers belong to the first type of reference signals measured by the terminal equipment.

In addition, the one or more reference signal identifiers are determined according to measurement results of the one or more reference signals of the first type and beam expansion factors corresponding to the one or more reference signals of the first type. The beam expansion factor corresponding to each first type of reference signal is used for adjusting the measurement result of the first type of reference signal.

Optionally, in some examples, the measurement report further includes adjustment values of measurement results of the one or more reference signals identifying respective corresponding reference signals of the first type. The adjustment value of the measurement result of each first type of reference signal is obtained by adjusting the measurement result of the first type of reference signal by adopting a beam expansion factor corresponding to the first type of reference signal.

Based on the selection principle of "reporting the first type of reference signal with the largest adjustment value of RSRP" described above, the first type of reference signal corresponding to the one or more reference signal identifiers carried in the measurement report is selected from the measured first type of reference signals by the terminal device based on the size of the adjustment value of RSRP, for example, the terminal device selects one or several first type of reference signals with the largest adjustment value of RSRP, which may be specifically configured by the network side.

As some examples, the terminal device may transmit the adjustment value of the beam selected according to the beam spreading factor and/or the measurement result of the first type reference signal by using uplink resources or channels such as an uplink control channel, an uplink data channel, or an uplink shared channel, or by explicit means such as RRC signaling, MAC-CE message, or uplink control information (uplink control information, UCI).

Optionally, the terminal device may also transmit the adjustment value of the measurement result of the beam and/or the first type reference signal selected according to the beam expansion factor in an implicit manner by using a random access channel (random access channel, RACH), an uplink sounding signal, an uplink demodulation reference signal, or the like.

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

Alternatively, the beam expansion factor may be beam level, reference signal resource set level, carrier level, or cell level.

Wherein the beam spreading factor of the beam level or the reference signal resource level indicates that the access network device has the capability of providing a service beam with better beam gain in the coverage area of one transmission beam.

In one example, each reference signal resource is configured with a beam expansion factor, as shown in table 1.

TABLE 1

Reference signal resource identification	Beam expansion factor (dB)
		RS1	x
RS3	y

For example, for RS1, its corresponding beam spreading factor is x, and for RS3, its corresponding beam spreading factor is y, in decibels (dB).

For the UE, after the measurement result is obtained by measuring the reference signal from the access network device, the measurement result needs to be adjusted by using the beam expansion factor corresponding to the reference signal, so as to obtain the adjustment value of the measurement result.

For example, after the UE measures RS1 to obtain a measurement result of RS1, the UE adjusts the measurement result of RS1 by using a beam expansion factor corresponding to RS1 to obtain an adjustment value of the measurement result of RS1, specifically, a measurement result +x of RS1, with a unit of decibel milliwatt (relative to one milliwatt, dBm).

For another example, after the UE measures RS3 to obtain a measurement result of RS3, the UE adjusts the measurement result of RS3 by using a beam expansion factor corresponding to RS3 to obtain an adjustment value of the measurement result of RS3, specifically, a measurement result +y of RS3, with a unit of dBm.

For example, assume that the measurement result of RS1 is-90 dBm, x=3, and the adjustment value of the measurement result is (-90+3) dBm, i.e., -87dBm, after the ue adjusts the measurement result by using the beam expansion factor x corresponding to RS 1. Assuming that the measurement result of RS3 is-95 dBm, y=6, and after the ue adjusts the measurement result by using the beam expansion factor y corresponding to RS3, the adjustment value of the measurement result is (-95+6) dBm, that is, -89dBm.

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

In this example, the beam expansion factor is applicable for each reference signal resource in the set of reference signal resources. That is, the terminal device measures the measurement result of any one reference signal in the reference signal resource set, and can adjust the measurement result by adopting the beam expansion factor 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 expansion factor as an example, the measurement results obtained by the UE measuring the reference signals on different carriers may be adjusted by using the beam expansion factors corresponding to the respective carriers, so as to obtain adjustment values of the measurement results.

For example, carrier 1 is configured with a beam spreading factor of 1 and carrier 2 is configured with a beam spreading factor of 2. The UE measures the reference signal on carrier 1 and may then adjust the measurement with beam spreading factor 1. The UE measures the reference signal on carrier 2 and may then adjust the measurement with beam spreading factor 2.

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

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

In the embodiment of the application, the UE adjusts the measurement result of each reference signal according to the beam expansion factor corresponding to the reference signal, so as to obtain an 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 measurement reports from the terminal device.

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

The access network equipment provides a service beam for data transmission for the UE according to the measurement report, specifically, according to the one or more reference signal identifiers carried in the measurement report, or according to the one or more reference signal identifiers and the adjustment value of the measurement result of the first type of reference signal corresponding to the one or more reference signal identifiers.

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

Unlike the first type of reference signal, the second type of reference signal may be any of the following signals:

channel state information reference signals (channel state information reference signal, CSI-RS), downlink control channel demodulation reference signals (demodulation reference signal, DMRS), downlink shared channel demodulation reference signals, downlink phase noise tracking signals, tracking signals (Tracking reference signal, TRS), and the like.

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

The network device may deploy different beamforming strategies in view of different hardware capabilities, overhead and power consumption. Some transmitters may support wide beams as well as narrow beams. They can perform beam scanning for a plurality of users in common using only a wide beam and then perform data transmission for a specific terminal using one narrow beam. However, since this narrow beam is not visible to the terminal until the actual data transmission, the terminal may miss such a more potential serving cell, transmission point, or beam. Thus, the beam expansion factor may be used to inform the terminal that it may expect to obtain a higher gain serving beam during data transmission if the terminal chooses to attach to the serving cell, transmission point, or beam.

Because the measurement report reported by the UE considers the beam expansion factor, rather than simply reporting the measurement result of the first type of reference signal, in some scenarios, the UE may be prevented from directly selecting the service beam according to the measurement result of the first type of reference signal, which results in a problem that an optimal beam (for example, a beam corresponding to the second type of reference signal) beneficial to data transmission cannot be selected.

The following is described in connection with some scenarios.

Scene 1

Switching of stations or beams.

For a mobile terminal device it is important to select which station is the serving station. If the terminal device selects a serving station based only on measuring the quality of the beam for beam scanning, it may occur that the data transmission rate is rather lower although the quality of the beam for beam scanning is higher, as will be explained below in connection with fig. 5.

Referring to fig. 5, fig. 5 is a schematic diagram of a scenario in which a UE performs station switching or beam switching. Fig. 5 shows the coverage of the individual beams of station 1 and station 2 with RSRP = -90dBm as an exemplary boundary. For example, station 1 has a precise alignment capability, and the beam used by station 1 to transmit RS1 belongs to one of the beams used for beam scanning of station 1, whereas the beam used by station 1 to transmit RS2 belongs to one of the beams used for data transmission of station 1, is a beam having a precise alignment capability. Station 2 does not have the precise alignment capability, and the beam used by station 2 to transmit RS3 belongs to the beam used by station 2 for beam scanning, and is also the beam used by station 2 for data transmission. In other words, station 1 may provide two types of beams so that one UE may be provided with beams of two different beam gains, while station 2 may provide only one type of beam so that only one UE may be provided with beams of one beam gain.

If the reference signals corresponding to the beam for beam scanning are periodically transmitted, the reference signals that the UE can periodically measure are RS1 from station 1 and RS3 from station 2. From the above description of a station with accurate alignment capability, it is known that by measuring RS1 and RS3, and only if RS1 is selected and reported to the access network, the access network may send RS2 to the UE by using a narrower, higher beam gain beam through station 1.

It can be appreciated 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 beam-corresponding reference signals for beam scanning of the station 1 and the station 2, specifically, the UE periodically measures RS1 and RS3, resulting in respective RSRP. Let RSRP = -95dBm for RS1 and RSRP = -90dBm for RS3. If the UE selects a beam according to the measurement result of the first type of reference signal only, since the RSRP of RS3 is better than that of RS1, the UE will naturally select RS3 to report to the access network, so that its serving station is station 2.

However, in practice, in the stage of actually performing data transmission, since the station 1 has the capability of providing RS2 with better beam gain, the RSRP of RS2 may reach-88 dbm, and the RSRP of RS2 is higher than that of RS1 of the station 1 and that of RS3 of the station 2, which is more advantageous for data transmission of the UE.

It can be seen that the UE selects a serving site or a serving beam only according to the measurement results of the first type of reference signals, e.g. RSRP, may be the case when selecting a serving beam that is unfavorable for data transmission.

Scene 2

Scene of multi-user pairing.

Due to hardware limitations of analog beamforming, a set of radio frequency channels can only transmit toward one beam direction at a time. In general, the higher the required beam gain, the narrower the beam, the smaller the range that can be covered by the beam. Herein, "multi-user" refers to a plurality of users (i.e., multi-terminal devices) that can be served on a set of radio frequency channels. Multi-user transmission is advantageous for improving cell capacity. A precondition for multi-user transmission is the presence of multiple users that can be paired. If the beam coverage is small, the number of users that can be covered becomes small. Moreover, since the data of each user arrives randomly, not every user has a data transmission requirement at the same time. These factors ultimately make the probability of successful pairing of multiple users low and do not function to increase cell capacity. Therefore, each user uses the beam with the best signal quality, and cell capacity maximization is not necessarily achieved. The following is a description with reference to fig. 6.

Referring to fig. 6, fig. 6 is a schematic diagram of a transmit beam of a multi-user pairing scenario. As in fig. 6, UE1 and UE2 are two different terminal devices. UE1 and UE2 each perform beam selection by measuring reference signals RS1, RS2, and RS3 for beam scanning transmitted by site 1 and according to the measurement result of the reference signals, for example RSRP. In the example of fig. 6, UE1 would select RS1 and UE2 would select RS2. Thus, the access network needs to serve the two UEs separately using two sets of radio frequency channels. It is assumed that in this case, the data transmission rates of UE1 and UE2 can reach rate 1 and rate 2, respectively.

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

rate 1+Rate 2 > Rate 1 '+Rate 2' (1)

However, in the case that the station 1 provides the beam corresponding to the RS3 for data transmission of the UE1 and the UE2, the station 1 uses only one set of radio frequency channels, and the remaining set of radio frequency channels can serve other users. Assuming that station 1 may also serve UE3 using the remaining set of radio frequency channels and that the data transmission rate provided by station 1 to UE3 may reach rate 3', station 1 provides data transmission services for 3 users (i.e., UE1, UE2, and UE 3) simultaneously. In this case, the data transmission rate of each user may satisfy the formula (2):

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

It can be seen that in case 2, the terminal device selects a beam simply by measuring the quality of the first type of reference signal, which is detrimental to cell capacity maximization.

It can be seen that, by measuring the first type of reference signal and considering only the measurement result thereof, the terminal device selects a beam for data transmission, and in scene 1 of site switching, the terminal device may select a beam unfavorable for data transmission, and in scene 2 of multiple users, the beam selected by each of the multiple terminal devices may not reach the maximum cell capacity, and is unfavorable for data transmission.

Therefore, in the technical solution of the present application, when selecting a beam for data transmission, the terminal device needs to consider, in addition to the measurement results of the first type of reference signals, the respective beam expansion factors of the first type of reference signals.

In scenario 1, the network side configures a beam expansion factor, which is used to indicate that the UE is within the coverage area of the beam corresponding to the beam expansion factor, and the network side has the capability of providing a narrower beam with higher gain for data transmission of the UE.

In other words, the network side configures the beam expansion factor, which has the effect that the terminal device adopts the beam expansion factor to adjust the measurement result of the first type reference signals, so as to avoid that the terminal device directly loses the possibility of selecting the station corresponding to some first type reference signals as the service station because the measurement result of some first type reference signals is lower than the measurement result of the first type reference signals of other stations, thereby avoiding selecting the station which is unfavorable for data transmission as the service station.

In scenario 2, the network side configures a beam expansion factor to assist the UE in selecting a beam that is beneficial to maximizing cell capacity.

The network side is used for adjusting the measurement result of the first type reference signals by configuring the beam expansion factors, so that the possibility that the beam corresponding to the first type reference signals with lower measurement result is selected as the service beam by the terminal equipment is improved, the probability of successful multiuser pairing is improved, and the terminal equipment is facilitated to select the beam which maximizes the cell capacity.

Optionally, in step 220, the beam expansion factor may be specified by a 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 expansion factor for the UE through RRC signaling. In this case, step 240 may also be included before step 220.

240. The access network equipment sends configuration information to the UE, wherein the configuration information carries information of the beam expansion factor.

It should be understood that the configuration information carries information of beam expansion factors corresponding to the first type of reference signals of each station.

As some examples, the access network device may send the configuration information to the terminal device using a downlink resource or channel such as a broadcast channel, a system message update, a paging message, a downlink control channel, a downlink data channel, a downlink shared channel, or through radio resource control (radio resource control, RRC) signaling, a medium access control element (MAC-CE) message, or DCI, without limitation.

Optionally, in some examples, the configuration information may carry beam expansion factors respectively corresponding to all first type reference signals of each station.

For example, in the example of fig. 5, the configuration information may carry a beam spreading factor corresponding to RS1 and a beam spreading factor corresponding to RS 3.

Alternatively, in other examples, the configuration information may carry a beam expansion factor corresponding to a portion of the first type of reference signals, while another portion of the first type of reference signals does not configure the beam expansion factor. Wherein the measurement results of the first type of reference signals for which the beam expansion factor is not configured are default to be non-adjustable.

For example, in the example of fig. 5, the UE obtains the RSRP of RS1 and the RSRP of RS3 through periodic measurement, and if the UE receives that the configuration information from the access network device only carries the beam expansion factor corresponding to RS1, the UE defaults to RS3 without beam expansion capability.

Still alternatively, in other examples, the beam expansion factor corresponding to the reference signal of the first type that does not have beam expansion capability may be configured to be 0dB, defaulting to the reference signal of the first type that does not have beam expansion capability.

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

Alternatively, the configuration information may be included in an RRC message, without limitation.

As described above, the configuration of the beam expansion factor is reference signal resource granularity.

As one example, a partial field of the configuration information may be as follows:

wherein, "ExpansionFactor" represents a beam expansion factor in an embodiment of the present application. In the above example, the beam expansion factor is an integer, e.g., in dB, in the range of { -15,..16 }.

The values of the beam expansion factors are merely examples herein, and those skilled in the art may set different value ranges in different scenarios according to the effects of the beam expansion factors, and are not limited.

For example, if the difference between RSRP of the first type of reference signal and RSRP of the second type of reference signal transmitted by one station is large, the beam expansion factor may be set to be larger. If the difference between the RSRP of the first type of reference signal and the RSRP of the second type of reference signal is smaller, the beam expansion factor may be set smaller.

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

In one example, the partial resources of the configuration information may be as follows:

/>

likewise, "ExpansionFactor" means a beam expansion factor. In the above example, the beam expansion factor has an integer value and a range of values of { -15,..16 }.

In some examples, if the configuration information only includes the beam expansion factors of a part of the first type reference signals, but not all the beam expansion factors of the first type reference signals that can be measured by the terminal device, the first type reference signals default to have no beam expansion function without the beam expansion factors are not configured, or the default to be that the value of the beam expansion factors is 0dB.

Furthermore, the terminal device selects a service beam for data transmission taking into account the beam expansion factor, rather than merely taking into account the measurement results of the first type of reference signals as the sole consideration, is a manifestation of the terminal device's capabilities. In other words, only the terminal device supporting the selection of the service beam for data transmission based on the beam expansion factor may select the service beam for data transmission and report the network using the technical scheme provided in the present application.

Optionally, the method 200 may further comprise step 250.

250. The terminal device sends capability information to the access network device, the capability information being used to instruct the terminal device to support selection of the reference signal based on the beam expansion factor.

For example, the access network device receives capability information from the terminal device, and in the case that the terminal device supports selecting the first type of reference signals based on the beam expansion factors, the access network device sends the information of the beam expansion factors of the first type of reference signals to the terminal device, so that the terminal device can be conveniently used for selecting beams subsequently.

For another example, the access network device receives capability information from the terminal device indicating that the terminal device does not support selecting the first type of reference signals based on the beam expansion factor. In this case the access network device may choose not to send the information of the beam expansion factor to the terminal device, which is not of interest in this application.

It should be understood that the numbering of the steps in the method 200 is merely for convenience in describing the flow of the method, and the embodiments do not limit the order in which they follow.

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

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

For another example, the value of the beam expansion factor is set based on a ratio or a difference between the number of radio frequency channels when the access network device transmits the first type of reference signal and the number of radio frequency channels activated when the access network device transmits the second type of reference signal.

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

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

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

Optionally, in some examples, in step 220, the terminal device sending the measurement report is event-triggered. In other words, the terminal device measures the first type of reference signals from the access network device, and obtains the measurement result of the first type of reference signals. Further, the terminal device sends a measurement report according to the measurement result of the first type of reference signals and the beam expansion factor under the condition that the trigger condition of event triggering is met.

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

Triggering 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, the threshold value is-90 dBm, and the terminal device measures one or more first type reference signals from the access network device to obtain measurement results of the one or more first type reference signals. And the terminal equipment adjusts the measurement result of each first type of reference signals in the one or more first type of reference signals by combining the beam expansion factors corresponding to the one or more first type of reference signals to obtain an adjustment value of the measurement result. The terminal device compares the adjustment values of the measurement results with a threshold value, and if the adjustment values are higher than the threshold value, the terminal device sends a measurement report to the access network device, wherein the measurement report contains the identification of one or more first type reference signals of which the adjustment values of the measurement results are higher than the threshold value, namely the identification of one or more reference signals.

Or, the measurement report includes one or more reference signal identifiers, and each reference signal identifier corresponds to a reference signal of a first type, where an adjustment value of the measurement result is higher than a threshold value.

For example, the terminal device measures 3 first type reference signals, which are RS1, RS2 and RS3, respectively, wherein the adjustment value of RSRP of RS1 and the adjustment value of RSPR of RS2 are higher than the threshold value. The terminal device sends a measurement report to the access network device.

In one example, the measurement report may contain an identification of all reference signals for which the adjustment value of the measurement result is above the threshold value, e.g., the measurement report may include an identification of RS1 and an identification of RS 2.

In another example, the measurement report may contain an identification of a portion of the reference signal for which the adjustment value of the measurement result is above the threshold value, e.g., the measurement report may contain an identification of RS1 or the measurement report may contain an identification of RS 2.

The identity of how the terminal device reports the selected reference signal may be configured by the network, and embodiments are not limited. For example, the terminal device may select one of the first type of reference signals with the highest adjustment value from the first type of reference signals with the adjustment value higher than the threshold value for reporting, or the terminal device may randomly select one of the first type of reference signals with the adjustment value higher than the threshold value for reporting.

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

For example, the case where the terminal device measures the reference signal is shown in table 2.

TABLE 2

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Due to the configuration of the beam expansion factor, the terminal device needs to calculate an adjustment value for each measurement result in consideration of the influence of the beam expansion factor after completing the measurement, as shown in table 3.

TABLE 3 Table 3

It can be found that if the beam expansion factor is not configured, the terminal device can judge that the RSRP of the RS1 is greater than the threshold value and the RSRP of the RS3 is less than the threshold value through the measured RSRP of the different first type reference signals, and then the terminal device selects the RS1 and reports the selected RSRP to the network side.

However, if the beam expansion factor is configured, after the terminal device adjusts the measurement result of the first type of reference signal by using the beam expansion factor, it finds that the RSRP of RS3 is also greater than the threshold value, and then the terminal device may choose to report RS3. In practice, by selecting the station 1 corresponding to RS3, the terminal device may obtain a narrower beam (for example, a beam corresponding to RS2 in fig. 5) provided by the station 1 and having a higher beam gain for data transmission, so that the terminal device obtains a higher data transmission rate, which helps to avoid the problem described in scenario 1 above.

Triggering condition 2: the adjustment value of the RSRP of the first reference signal is higher than the adjustment value of the RSRP of the second reference signal.

The method comprises the steps that a first reference signal and a second reference signal belong to a first type of reference signal measured by a terminal device, wherein an adjustment value of the RSRP of the first reference signal is obtained by adjusting the RSRP of the first reference signal by adopting a first beam expansion factor corresponding to the first reference signal, and an adjustment value of the RSRP of the second reference signal is obtained by adjusting the RSRP of the second reference signal by adopting a second beam expansion factor corresponding to the second reference signal.

For example, taking station switching as an example, in the triggering condition 2, the terminal device measures at least two first-class reference signals, and adjusts RSRP of each first-class reference signal according to beam expansion factors corresponding to the at least two first-class reference signals, so as to obtain an adjustment value of RSRP. By comparing these adjustment values, if the adjustment value of the RSRP of the first reference signal provided by one station (for example, the first station) is greater than the adjustment value of the RSRP of the second reference signal provided by the current station (for example, the second station), the triggering condition 2 is satisfied, and the terminal device sends a measurement report to the access network device to request to switch to the first station. The measurement report may carry an identifier of the first reference signal.

Subsequently, the terminal device may receive a third reference signal from the access network device, and in particular, 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 configures the beam expansion factor, which indicates that the first station may also provide the terminal device with a beam higher than the gain of the beam corresponding to the first reference signal, i.e. a beam corresponding to the third reference signal. In addition, the third reference signal is a data signal, or a beam corresponding to the third reference signal is used for data transmission, and beams corresponding to the first reference signal and the second reference signal are used for beam scanning.

It should be understood that the current station refers to a station that is currently providing a serving beam for the UE.

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

Typically, the identity of the reference signal has an association with the site 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 has an association with the number of the station.

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

a control channel resource set index (CORESET index), a control channel resource set pool index (CORESET pool index), a "serving cell index", a "serving cell Identity (ID)", "non-serving cell index", "cell identity (cell ID)", "physical cell identity (physical cell identity, PCI)", "transmission point identity (or transmission point index)", and "carrier component identity (component carrier identifier, CC ID)", and the like.

According to the association relation between the identification of the reference signals and the site numbers, the terminal equipment can acquire the information of the sites corresponding to the first type of reference signals according to the measured identification of the first type of reference signals, so as to judge whether other sites capable of providing better beams exist. If there are other stations providing beams better than the current station, the terminal device may request to the access network device to switch stations.

For another example, taking beam switching as an example, the terminal device does not need to distinguish from which station the measured reference signals of the first type come, and can send a measurement report to the access network device to request to switch the service beam only if the adjustment value of RSRP of one reference signal is higher than that of the other reference signal. Specifically, the terminal device may request, as the service beam, a beam corresponding to the first type reference signal with a higher adjustment value.

Optionally, in this scenario, the second reference signal in the trigger condition 2 may be a reference signal corresponding to a current service beam of the terminal device, and the first reference signal may be any one of first reference signals measured by the terminal device.

Taking the data in table 2 and table 3 above as an example, assume that the RSRP of RS1 measured by the terminal device is-90 dBm, the RSRP of RS3 is-95 dBm, as shown in table 2, and the site currently providing the service beam for the terminal device is the site corresponding to RS 1. The terminal device adjusts the RSRP of RS1 and the RSRP of RS3 by using the beam expansion factor, to obtain an adjustment value of the RSRP, as shown in table 3.

Since the adjustment value of RSRP of RS1 is smaller than that of RSRP of RS3, and trigger condition 2 is satisfied, the terminal device may send a measurement report to request to switch service sites. For example, the terminal device may request handover to a station corresponding to RS 3.

As another example, RSRP of the first type of reference signal measured by the terminal device and the configured beam expansion factor are shown in table 4.

TABLE 4 Table 4

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

In the technical scheme of the application, the network side informs the terminal equipment that the beam with higher beam gain can be provided for data transmission on the basis of providing the first type of reference signals corresponding to the beam for beam scanning by configuring the beam expansion factor for the terminal equipment, so that the terminal equipment can select a station capable of providing higher data transmission rate, and the data transmission is facilitated.

The manner in which the access network device configures the beam expansion factor for the terminal device in the above embodiment is merely an example, and the network device may also introduce the beam expansion factor in the initial access procedure, the beam management procedure, and the handover procedure, and some other implementations are given below.

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

The terminal device may adjust the measurement result of the SS/PBCH according to the beam expansion factor, for example, select the RACH resource corresponding to the SS/PBCH with the highest RSRP after adjustment for access. Wherein, the corresponding relation between the SS/PBCH and the RACH resource is preconfigured. Alternatively, the transmission power of the terminal transmitting the RACH resource may be adjusted according to a beam spreading factor. For example, if the beam expansion factor corresponding to the SS/PBCH with the highest RSRP after adjustment is 3dB, the RACH resource power corresponding to the terminal transmission is min { maximum output power, target power+path loss+3 dB }, where min { } represents the operation of taking the minimum value, the target power is preconfigured, and the path loss is the SS/PBCH transmission power minus the measured RSRP of the SS/PBCH.

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

The terminal device may adjust a reception average gain (average gain) according to the beam expansion factor. For example, the beam spreading factor corresponding to the reference signal in the TCI state indication for PDSCH is 3dB, and 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. Alternatively, the QCL parameters of the reference signal are used to compensate the PDSCH, and an additional 3dB gain is considered.

In other embodiments, the access network device may configure the beam expansion factor related information in an uplink beam related indication. For example, a beam expansion factor may be included in the spatial correlation or the upstream TCI. Each spatial relationship or uplink TCI may have a different beam expansion factor.

The terminal device may adjust an uplink transmission beam or uplink transmission power according to the beam expansion factor. For example, the beam expansion factor corresponding to the reference signal in the spatial relation indication for PUCCH is 3dB, and then the terminal uses a transmit beam with a beam gain 3dB higher than the transmit beam gain corresponding to the receive beam of the reference signal. Alternatively, the terminal performs uplink transmission using a transmission beam corresponding to the reception beam of the reference signal, but needs to consider an additional 3dB transmission power.

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

The terminal device may determine the uplink transmit power according to the beam expansion factor related information. For example, the beam expansion factor corresponding to the path loss reference signal is 3dB, for example, the terminal device may determine the transmission power according to min { maximum output power, target power+ (path loss+3 dB) +other adjustment amount }, where min { } represents an operation of taking the minimum value, the target power is P0 configured in advance, and the path loss is the measured RSRP of the path loss reference signal subtracted from the transmission power of the path loss reference signal.

The application of the technical solution of the present application in scenario 1 is illustrated below with reference to fig. 7.

Referring to fig. 7, fig. 7 is an example of a method of selecting a beam provided herein.

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

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

Alternatively, the capability information may be carried in an RRC message, without limitation.

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

320. The access network device sends configuration information to the terminal device, wherein the configuration information comprises information of the beam expansion factor.

Alternatively, the configuration information may be carried in an RRC message.

The information of the beam expansion factor may refer to the above description, and will not be described in detail.

330. The access network equipment sends M first type reference signals to the terminal equipment, wherein M is more than or equal to 1, and M is an integer.

The terminal equipment measures M first-type reference signals from the access network equipment to obtain the RSRP of each first-type reference signal in the M first-type reference signals.

340. Under the condition that the triggering condition 1 or the triggering condition 2 is met, the terminal equipment sends a measurement report to the access network equipment, wherein the measurement report comprises N reference signal identifiers, N is more than or equal to 1, N is less than or equal to M, and N is an integer.

The N reference signal identifiers are used for identifying N first type reference signals, where 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 RSRP of the M first type reference signals according to beam expansion factors of the M first type reference signals, so as to obtain adjustment values of RSRP of each of the M first type reference signals. Further, the terminal device selects N first type reference signals to feed back to the access network device according to the adjustment values of RSRP of the M first type reference signals. The measurement report carries the identifiers of the selected N first type reference signals.

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

Wherein the second type of reference signal is used for transmitting data. Or, the second type of reference signal is a data signal.

For example, in fig. 5, the UE measures RS1 (i.e., an example of a first reference signal) and RS3 (i.e., an example of a second reference signal) from the access network device. According to the adjustment value of the RSRP of the RS1 and the RSRP of the RS3, the UE sends a measurement report to the access network equipment, wherein the measurement report carries the identification of the RS 1. 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 (i.e., an example of the third reference signal) to the terminal device through the station 1, and a beam corresponding to the RS2 is a beam used for data transmission.

In this embodiment, the terminal device measures one or more reference signals of the first type from the access network device, i.e. the terminal device measures reference signals of the first type from one or more stations. The terminal equipment considers the influence of the beam expansion factors on the measurement results of the first type of reference signals, adjusts the respective measurement results according to the beam expansion factors corresponding to the first type of reference signals, and selects the service beam to report according to the adjustment value, thereby being beneficial to the terminal equipment to select the sites which can provide the second type of reference signals more beneficial to data transmission. Therefore, the station which can provide the second type reference signals sends the second type reference signals to the terminal equipment, so that the data transmission rate can be improved.

The application of the technical scheme of the application in the scene 1 is described above, and the application of the embodiment of the application in the scene 2 is described below.

Referring to fig. 8, fig. 8 is another schematic flow chart of a method of selecting a beam provided herein. The method 500 generally includes steps 510-530. Optionally, steps 540 and/or 550 may also be included.

510. The terminal equipment measures one or more first type reference signals from the access network equipment to obtain a measurement result of each first type reference signal.

Step 510 may refer to step 210, and will not be described again.

520. The terminal device sends a measurement report containing one or more reference signal identities.

In scenario 2, after the terminal device completes measurement, a measurement report may be sent to the access network device according to the configuration of the network side.

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

For example, the case where the terminal device 1 measures the reference signal is as shown in the data in table 5.

TABLE 5

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

TABLE 6

Tables 5 and 6 may be understood in connection with the scenario shown in fig. 6.

Assuming that the network side configures the terminal device to only report one reference signal identifier, for example, the network side configures nrofreportedb stream=1 in the configuration information, which means that the terminal device can only report one reference signal identifier and the corresponding adjustment value of RSRP, then the terminal device 1 adjusts the RSRP of RS1 and the RSRP of RS3 according to the beam expansion factors corresponding to RS1 and RS3 respectively, so as to obtain the respective adjustment values. Based on the data shown in table 5, the 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 identity of RS 3.

The terminal device 2 adjusts the RSRP of the RS2 and the RSRP of the RS3 according to the beam expansion factors corresponding to the RS2 and the RS3 respectively, and obtains the adjusted RSRP. Based on the data shown in table 6, the 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 identity of RS 3.

In this example, RS3 is one example of the fourth reference signal, and specific reference may be made to the scenario shown in fig. 6.

Here, the terminal device can only report one reference signal identifier 2 is taken as an example for illustration, and the network side can also configure the terminal device to adopt other reporting modes.

For example, the network side may configure the terminal device to report the identities of two or more reference signals. For another example, the network side may configure the terminal device to report the identities of all reference signals above the threshold value. For another example, the measurement report may include the identifier of the selected reference signal, and 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 equipment provides service beams for data transmission for the at least two terminal equipment according to the measurement reports of the at least two terminal equipment.

It should be appreciated that in scenario 2, based on cell capacity maximization considerations, in order to enable one access network device to serve more terminal devices, with the number of radio frequency channels unchanged, the access network device mainly considers whether there are multiple terminal devices (i.e. multiple users) that can be paired. If there are terminal devices that can be paired, the access network device provides a service beam for the plurality of terminal devices through a set of radio frequency channels.

Taking table 5 and table 6 as an example, the terminal device 1 sends a measurement report 1, the measurement report 1 carries the identifier of RS3, the terminal device 2 sends a measurement report 2, and the measurement report 2 contains the identifier of RS 3. The access network device can learn from the measurement report 1 and the measurement report 2 that the terminal device 1 and the terminal device 2 can be paired, and therefore, the access network device provides RS3 for both the terminal device 1 and the terminal device 2 as its service beam for data transmission.

In addition, in step 530, the access network device may mute to cover the narrow beams of the terminal device 1 and the terminal device 2 in the case of providing the wide beams for data transmission to the terminal device 1 and the terminal device 2 as service beams.

Taking fig. 6 as an example, assume that UE1 and UE2 both report the identity of RS3, and site 1 provides RS3 for UE1 and UE2 as a service beam for data transmission while muting RS1 and RS2.

In addition, in the case of the scenario 2, the beam expansion factor may be specified by a protocol, or may be configured by the access network device for the UE through radio resource control (radio resource control, RRC) signaling, without limitation.

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

540. The access network device sends configuration information to the terminal device, wherein the configuration information carries information of the beam expansion factor.

The configuration of the beam expansion factor may be that the reference signal resource, the reference signal resource set, the carrier or the cell, etc. are granular, which is the same as the description in scenario 1, and is not repeated herein.

In addition, in the process shown in fig. 8, step 550 may be further included.

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

It should be appreciated that the capability information is particularly useful for indicating that the terminal device supports selection of a first type of reference signal based on the beam expansion factor.

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

By applying the technical scheme in the scene 2, the beam expansion factor configured by the access network equipment is related to the cell capacity, and the terminal equipment selects the reference signal by considering the beam expansion factor, so that the terminal equipment can select a service beam capable of maximizing the cell capacity.

The scenario shown in fig. 6 is illustrated below in connection with fig. 9.

Referring to fig. 9, fig. 9 is another example of a method of selecting a beam provided herein.

610. The terminal device sends capability information to the access network device, the capability information being used to instruct the terminal device to support selection of the reference signal based on the beam expansion factor.

Specifically, in a multi-user scenario, each terminal device may send its own capability information to the network side, taking terminal device 1 and terminal device 2 as examples in fig. 9.

620. The access network device sends configuration information to the terminal device, wherein the configuration information comprises information of the beam expansion factor.

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

630. The access network device transmits one or more reference signals of a first type.

As shown in fig. 6, station 1 transmits RS1, RS2, and RS3.RS1, RS2 and RS3 all belong to the first class of reference signals.

640. The terminal equipment sends a measurement report to the access network equipment based on the configuration of 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 signals based on a selection principle of "select first type of reference signal reporting with the largest adjustment value of RSRP".

For example, the network side configures the terminal device to report only one reference signal identifier, for the UE1, RS1 and RS3 may be measured, and if the RSRP of the RS1 and RS3 measured by the UE1 is shown in table 5, the UE1 sends the measurement report 1 to the access network device according to the measured adjustment value of the RSRP of the first type of reference signal. Based on the selection principle described above, UE1 should select RS3. Thus, the measurement report 1 contains the identity of RS3.

For UE2, UE2 may measure RS2 as well as RS3. Based on the same selection principle, it is assumed that RSRP of RS2 and RS3 measured by UE2 is shown in table 6, and UE2 sends measurement report 2 to the access network device according to the measured adjustment value of RSRP of the first type reference signal, where the measurement report 2 includes the identifier of RS3.

It should be appreciated that RS3 is one example of a fourth reference signal.

650. The access network device provides a beam corresponding to RS3 (i.e., fourth reference signal) as a service beam for data transmission of the terminal device 1 and the terminal device 2 based on the measurement report 1 and the measurement report 2.

The access network equipment configures the beam expansion factor for the terminal equipment from the point of maximum cell capacity, so that a plurality of terminal equipment can be successfully paired, thereby being capable of selecting the beam which is conducive to the maximization of the cell capacity and improving the cell capacity.

The method for selecting a beam provided in the present application is described in detail above with reference to fig. 2-9, and the communication device of the present application is described below.

Referring to fig. 10, fig. 10 is a schematic block diagram of a communication device provided herein. As shown in fig. 10, the communication device 1000 includes a processing unit 1100 and a transceiver unit 1200.

A processing unit 1100, 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, where the measurement report includes the one or more reference signal identifiers, and a reference signal corresponding to the one or more reference signal identifiers is determined according to a beam expansion factor and a measurement result of the reference signal, where the beam expansion 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 of the beam expansion factor.

Optionally, in another embodiment, the transceiver 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 expansion factor.

Optionally, in another embodiment, the configuration information includes information of a spreading factor, including:

the configuration information comprises one or more beam expansion factors, each beam expansion factor corresponds to one reference signal, wherein each beam expansion factor is used for adjusting the measurement result of the corresponding reference signal; or,

Optionally, in another embodiment, the measurement report further includes an adjustment value of a measurement result of the reference signal corresponding to each reference signal identifier, where the adjustment value of the measurement result of the reference signal is obtained by adjusting the measurement result of the reference signal according to a beam expansion factor corresponding to the reference signal.

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

and, the processing unit 1100 is configured to:

according to the association relation between the reference signal identification and the site number, determining that a first reference signal in the at least two reference signals is from a first site, and a second reference signal in the at least two reference signals is from a second site, wherein the second site is a service site of the terminal equipment, and beams corresponding to the first reference signal and the second reference signal are used for beam scanning;

and controlling the transceiver unit 1200 to transmit the measurement report to the access network device according to the RSRP of each of the first reference signal and the second reference signal and the beam expansion factors corresponding to each of the first reference signal and the second reference signal when the trigger condition is satisfied, the measurement report including the identification of the first reference signal,

wherein, the triggering 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 RSRP 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 a first beam expansion factor corresponding to the first reference signal, and when the second reference signal is configured with a second beam expansion factor, the adjustment value of the RSRP of the second reference signal is obtained by adjusting the RSRP of the second reference signal according to the second beam expansion factor.

Optionally, in another embodiment, the transceiver unit 1200 is further configured to receive a third reference signal from the access network device, where a 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;

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

Optionally, in another embodiment, the transceiver 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, where beams corresponding to the at least two reference signals are used for beam scanning, and the at least two reference signals include a fourth reference signal;

And the processing unit 1100 controls the transceiver unit 1200 to transmit the measurement report if it is determined that a trigger condition is satisfied, where the measurement report includes an identification of the fourth reference signal, and 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, where the beam corresponding to the fourth reference signal is provided by the access network device, the measurement reports of at least two terminal devices received by the access network device include identities of the fourth reference signal, and the beam corresponding to the fourth reference signal is used as the service beam of the at least two terminal devices.

Optionally, in another embodiment, the beam expansion 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, where the broadcast signal carries configuration information of a beam expansion factor of a reference signal, where the beam expansion factor of the reference signal is used to adjust a measurement result of the reference signal;

and, the transceiver unit 1200 is further configured to measure at least two reference signals from the access network device, and 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, where the first RACH resource is associated with a beam corresponding to a first reference signal of the at least two reference signals, and an adjustment value of a measurement result of the first reference signal is higher than measurement results or adjustment values of measurement results of other reference signals of the at least two reference signals, where the adjustment value of the measurement result of each reference signal is obtained by adjusting the measurement result of the reference signal according to a beam expansion factor corresponding to the reference signal.

Alternatively, the transceiving unit 1100 may include a receiving unit and a transmitting unit. The receiving unit is specifically configured to perform a transmitting action, and the receiving unit is specifically configured to perform a receiving action.

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

In another implementation, the communications apparatus 1000 may be a chip or integrated circuit mounted in a terminal device. In such an 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.

The functions of the processing device may be implemented by hardware, or may be implemented by executing corresponding software by hardware. For example, the processing means may comprise a memory for storing a computer program and a processor reading and executing the computer program stored in the memory, such that the communication means 1000 performs the operations and/or processes performed by the terminal device in the respective method embodiments. In the alternative, the processing means may comprise only a processor, the memory for storing the computer program being located outside the processing means. The processor is connected to the memory through circuitry/wiring to read and execute the computer program stored in the memory. As another example, the processing device may be a chip or an integrated circuit.

Referring to fig. 11, fig. 11 is a schematic block diagram of a communication device provided in the present application. As shown in fig. 11, the communication apparatus 2000 includes a transceiver unit 2100 and a processing unit 2200.

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

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

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

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

capability information is received from the terminal device, the capability information being used to indicate whether the terminal device supports selection of a reference signal based on the beam expansion factor.

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

And, the transceiver 2100 is further configured to receive a measurement report from the terminal device, where the measurement report includes an identifier of the first reference signal;

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

transmitting at least two reference signals, wherein beams corresponding to the at least two reference signals are used for beam scanning, and the at least two reference signals comprise a fourth reference signal;

and receiving measurement reports from at least two terminal devices, wherein the measurement reports of the at least two terminal devices all contain identifiers of fourth reference signals;

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

Alternatively, the transceiving unit 2100 may include a receiving unit and a transmitting unit. The receiving unit is specifically configured to perform a transmitting action, and the receiving unit is specifically configured to perform a receiving action.

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

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

The functions of the processing device may be implemented by hardware, or may be implemented by executing corresponding software by hardware. For example, the processing means may comprise a memory for storing a computer program and a processor reading and executing the computer program stored in the memory, such that the communication means 2000 performs the operations and/or processes performed by the access network device in the method embodiments. In the alternative, the processing means may comprise only a processor, the memory for storing the computer program being located outside the processing means. The processor is connected to the memory through circuitry/wiring to read and execute the computer program stored in the memory. As another example, the processing device may be a chip or an integrated circuit.

Referring to fig. 12, fig. 12 is a schematic structural diagram of a communication device 10 provided herein. As shown in fig. 12, the communication apparatus 10 includes: one or more processors 11, one or more memories 12, and one or more communication interfaces 13. The processor 11 is configured to control the communication interface 13 to send and receive signals, the memory 12 is configured to store a computer program, and the processor 11 is configured to call and run the computer program from the memory 12, so that the processes and/or operations performed by the terminal device in the method embodiments of the present application are performed.

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. 10. In particular, the processor 11 may be used to perform the processing or operations of fig. 2-9 performed internally by the terminal device, and the communication interface 13 is used to perform the actions of transmitting and/or receiving performed by the terminal device of fig. 2-9.

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

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

In another implementation, the communication apparatus 10 may be a chip mounted in a terminal device. In such an implementation, 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 a 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 configured to control the communication interface 23 to send and receive signals, the memory 22 is configured to store a computer program, and the processor 21 is configured to call and run the computer program from the memory 22, so that the procedures and/or operations performed by the access network device in the method embodiments of the present application are performed.

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. 11. Specifically, the processor 21 may be configured to perform the processing or operation performed by the access network device in fig. 2-9, and the communication interface 23 is configured to perform the sending and/or receiving actions performed by the access network device in fig. 2-9, which are not described herein.

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

Alternatively, 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 the access network equipment. In such an implementation, the communication interface 23 may be an interface circuit or an input/output interface.

Alternatively, the memory and the storage in the above embodiments of the apparatus may be physically separate units, or the memory may be integrated with the processor, which is not limited herein.

Furthermore, the present application also provides a computer readable storage medium, where computer instructions are stored, when the computer instructions run on a computer, to cause operations and/or flows performed by a terminal device in the method embodiments of the present application to be performed.

The present application also provides a computer readable storage medium having stored therein computer instructions that, when executed on a computer, cause operations and/or flows performed by an access network device in method embodiments of the present application to be performed.

The present application also provides a computer program product comprising computer program code or instructions which, when run on a computer, cause operations and/or flows performed by a terminal device in the method embodiments of the present application to be performed.

The present application also provides a computer program product comprising computer program code or instructions which, when run on a computer, cause operations and/or flows performed by access network devices in the method embodiments of the present application to be performed.

In addition, the application also provides a chip, wherein the chip comprises a processor. The memory for storing the computer program is provided separately from the chip and the processor is adapted to execute the computer program stored in the memory such that the operations and/or processes performed by the terminal device in any of the method embodiments are performed.

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

The present application also provides a chip including a processor. The memory for storing the computer program is provided separately from the chip and the processor is configured to execute the computer program stored in the memory such that the operations and/or processing performed by the access network device in any of the method embodiments is performed.

In addition, the application also provides a wireless communication system, which comprises the terminal equipment and/or the access network equipment in the embodiment of the application.

The processor in the embodiments of the present application may be an integrated circuit chip with the capability of processing signals. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware encoding processor executing, or may be implemented by a combination of hardware and software modules in the encoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

The memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DRRAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. Wherein, A, B and C can be singular or plural, and are not limited.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of selecting a beam, comprising:

the terminal equipment measures a reference signal from the access network equipment to obtain a measurement result of the reference signal;

the terminal equipment sends a measurement report, wherein the measurement report comprises one or more reference signal identifiers, reference signals corresponding to the one or more reference signal identifiers are determined according to a beam expansion factor and measurement results of the reference signals, and the beam expansion factor is used for adjusting the measurement results of the reference signals; wherein,

the beam expansion factor is determined according to the following parameters:

The ratio or the difference between the number of radio frequency channels when the access network equipment sends the reference signals corresponding to the beams used for beam scanning and the number of radio frequency channels activated when the access network equipment sends the reference signals corresponding to the beams used for data transmission.

2. The method according to claim 1, wherein the method further comprises:

the terminal equipment receives configuration information from the access network equipment, wherein the configuration information comprises information of the beam expansion factor.

3. The method of claim 2, wherein before the terminal device receives the configuration information from the access network device, the method further comprises:

and the terminal equipment sends capability information to the access network equipment, wherein the capability information is used for indicating the terminal equipment to support the selection of the reference signal based on the beam expansion factor.

4. A method according to claim 2 or 3, wherein the configuration information comprises information of a spreading factor, comprising:

5. The method according to any one of claims 1-4, wherein the measurement report further includes an adjustment value for the measurement result of the reference signal corresponding to each reference signal identifier, and wherein the adjustment value for the measurement result of the reference signal is obtained by adjusting the measurement result of the reference signal according to a beam expansion factor corresponding to the reference signal.

6. The method according to any of claims 1-5, wherein the measurement result is RSRP, the terminal device measures a reference signal from an access network device, and obtaining the measurement result of the reference signal comprises:

the terminal equipment measures at least two reference signals from the access network equipment to obtain respective RSRP of the at least two reference signals;

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

the terminal device sends the measurement report to the access network device according to the RSRP of the first reference signal and the second reference signal and the beam expansion factors corresponding to the first reference signal and the second reference signal, and the measurement report contains the identification of the first reference signal,

wherein, the triggering condition is as follows:

7. The method of claim 6, wherein after the terminal device sends the measurement report to the access network device, the method further comprises:

the terminal equipment receives a third reference signal from the access network equipment, a 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;

8. The method according to any of claims 1-5, wherein the terminal device measures a reference signal from an access network device, and obtaining a measurement result of the reference signal comprises:

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

the terminal device sends the measurement report under the condition that a trigger condition is met, wherein the measurement report comprises the identification of the fourth reference signal, and the trigger condition is as follows:

9. The method according to claim 8, wherein after the terminal device sends the measurement report if a trigger condition is met, the method further comprises:

the terminal device uses the beam corresponding to the fourth reference signal as a service beam,

the beam corresponding to the fourth reference signal is provided by the access network device, the measurement report of the at least two terminal devices received by the access network device contains the identifier of the fourth reference signal, and the beam corresponding to the fourth reference signal is used as the service beam of the at least two terminal devices.

10. The method according to any of claims 1-5, the measurement result being RSRP, the terminal device sending a measurement report to the access network device, comprising:

The terminal equipment sends the measurement report to the access network equipment according to the measurement result of the reference signal and the beam expansion factor under the condition that an event triggering condition is met, wherein the event triggering condition comprises one or more of the following:

the reference signals comprise first reference signals from a first station and second reference signals from other stations, wherein the adjustment value of the RSRP of the first reference signals is higher than that of the second reference signals, the adjustment value of the RSRP of the first reference signals is obtained by adjusting the RSRP of the first reference signals by adopting a first beam expansion factor corresponding to the first reference signals, and the adjustment value of the RSRP of the second reference signals is obtained by adjusting the RSRP of the second reference signals by adopting a second beam expansion factor corresponding to the second reference signals.

11. A method of selecting a beam, comprising:

The method comprises the steps that an access network device receives a measurement report from a terminal device, wherein the measurement report comprises one or more reference signal identifiers, the measurement report is obtained by the terminal device according to a measurement result obtained by measuring a reference signal from the access network device and a beam expansion factor, and the beam expansion factor is used for adjusting the measurement result of the reference signal;

the access network equipment provides a service beam for data transmission for the terminal equipment according to the measurement report; wherein,

the beam expansion factor is determined according to the following parameters:

12. The method of claim 11, wherein prior to the access network device receiving the measurement report from the terminal device, the method further comprises:

And the access network equipment sends configuration information to the terminal equipment, wherein the configuration information comprises the information of the beam expansion factor.

13. The method of claim 12, wherein the configuration information includes information of a spreading factor, comprising:

14. The method according to any one of claims 11-13, wherein the measurement report further comprises an adjustment value for the measurement result of the reference signal corresponding to each reference signal identifier, wherein the adjustment value for the measurement result of the reference signal is obtained by adjusting the measurement result of the reference signal according to a beam expansion factor corresponding to the reference signal.

15. The method according to any of claims 11-14, wherein before the access network device receives the measurement report from the 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 selecting a reference signal based on the beam expansion factor.

16. The method according to any of claims 11-15, wherein before the access network device receives the measurement report from the terminal device, the method further comprises:

the access network equipment sends at least two reference signals, wherein the at least two reference signals comprise a first reference signal sent by the access network equipment through a first station and a second reference signal sent by the access network equipment through a second station, and beams corresponding to the at least two reference signals are used for beam scanning;

the access network device receives a measurement report from the terminal device, and the method comprises the following steps:

the access network equipment receives a measurement report from the terminal equipment, wherein the measurement report comprises an identifier of a first reference signal;

the access network device provides a service beam for data transmission for the terminal device according to the measurement report, and the method comprises the following steps:

And the access network equipment sends a third reference signal to the terminal equipment through the first station according to the identifier of the first reference signal contained in the measurement report, wherein a beam corresponding to the third reference signal is used as a service beam for data transmission of the terminal equipment.

17. The method according to any of claims 11-15, wherein before the access network device receives the measurement report from the terminal device, the method further comprises:

the access network equipment sends at least two reference signals, wherein beams corresponding to the at least two reference signals are used for beam scanning, and the at least two reference signals comprise a fourth reference signal;

the access network equipment receives measurement reports from at least two terminal equipment, wherein the measurement reports of the at least two terminal equipment all contain identifiers of fourth reference signals;

and the access network equipment provides the sending beam corresponding to the fourth reference signal as the service beam of the at least two terminal equipment and quiets other sending beams.

18. A communication device, comprising:

the processing unit is used for measuring the reference signal from the access network equipment and obtaining the measurement result of the reference signal;

a transceiver unit, configured to send a measurement report, where the measurement report includes the one or more reference signal identifiers, and a reference signal corresponding to the one or more reference signal identifiers is determined according to a beam expansion factor and a measurement result of the reference signal, where the beam expansion factor is used to adjust the measurement result of the reference signal; wherein,

the beam expansion factor is determined according to the following parameters:

19. The communication device of claim 18, wherein the transceiver unit is further configured to:

And receiving configuration information from the access network equipment, wherein the configuration information comprises the information of the beam expansion factor.

20. The communication device of claim 19, wherein the transceiver unit is further configured to:

and transmitting capability information to the access network equipment, wherein the capability information is used for indicating that the communication device supports the selection of reference signals based on the beam expansion factors.

21. The communication apparatus according to claim 19 or 20, wherein the configuration information includes information of a spreading factor, comprising:

22. The communication apparatus according to any one of claims 18-21, wherein the measurement report further includes an adjustment value for a measurement result of the reference signal corresponding to each reference signal identifier, and wherein the adjustment value for the measurement result of the reference signal is obtained by adjusting the measurement result of the reference signal according to a beam expansion factor corresponding to the reference signal.

23. The communication device according to any of claims 18-22, characterized in that the measurement result is RSRP,

the receiving and transmitting unit is specifically configured to measure at least two reference signals from the access network device, and obtain RSRP of each of the at least two reference signals;

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

and the processing unit is further configured to control, according to RSRP of each of the first reference signal and the second reference signal and beam expansion factors corresponding to each of the first reference signal and the second reference signal, the transceiver unit to send the measurement report to the access network device when a trigger condition is met, where the measurement report includes an identifier of the first reference signal, and the trigger condition is as follows:

24. The communications apparatus of claim 23, wherein the transceiver unit is further configured to receive a third reference signal from the access network device, the beam corresponding to the third reference signal being provided by the first station, the beam corresponding to the third reference signal being used for data transmission;

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

25. The communication apparatus according to any of claims 18-22, wherein the transceiver unit 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, where beams corresponding to the at least two reference signals are each used for beam scanning, and 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, where the measurement report includes an identifier of the fourth reference signal, and the trigger condition is as follows:

26. The communication apparatus of claim 25, wherein the processing unit is further configured to use a beam corresponding to the fourth reference signal as a serving beam,

27. The communication apparatus according to any of claims 18-22, wherein the measurement result is RSRP, and the processing unit is further configured to control the transceiver unit to send the measurement report to the access network device if an event triggered condition is met, where the event triggered condition includes one or more of:

28. A communication device, comprising:

a transceiver unit, configured to receive a measurement report from a terminal device, where the measurement report includes one or more reference signal identifiers, where the measurement report is obtained by the terminal device according to a measurement result obtained by measuring a reference signal from the communication device and a beam expansion factor, where the beam expansion factor is used to adjust the measurement result of the reference signal;

a processing unit, configured to provide a service beam for data transmission for the terminal device according to the measurement report; wherein,

the beam expansion factor is determined according to the following parameters:

29. The communication device of claim 28, wherein the transceiver unit is further configured to:

and sending configuration information to the terminal equipment, wherein the configuration information comprises the information of the beam expansion factor.

30. The communication apparatus according to claim 29, wherein the configuration information includes information of a spreading factor, comprising:

31. The communication apparatus according to any one of claims 28-30, wherein the measurement report further includes an adjustment value for the measurement result of the reference signal corresponding to each reference signal identifier, wherein the adjustment value for the measurement result of the reference signal is obtained by adjusting the measurement result of the reference signal according to a beam expansion factor corresponding to the reference signal.

32. The communication apparatus according to any of claims 28-31, wherein the transceiver unit is further configured to receive capability information from the terminal device, the capability information being configured to indicate whether the terminal device supports selection of a reference signal based on the beam expansion factor.

33. The communication device according to any of claims 28-32, wherein the transceiver unit is configured to:

transmitting at least two reference signals, wherein the at least two reference signals comprise a first reference signal transmitted by the communication device through a first station and a second reference signal transmitted by the communication device through a second station, and beams corresponding to the at least two reference signals are used for beam scanning;

receiving a measurement report from the terminal equipment, wherein the measurement report comprises an identifier of a first reference signal;

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

34. The communication device according to any of claims 28-32, wherein the transceiver unit is further configured to:

receiving measurement reports from at least two terminal devices, wherein the measurement reports of the at least two terminal devices all contain identifiers of fourth reference signals;

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

35. A communication device comprising a processor and interface circuitry for receiving computer code or instructions and transmitting to the processor, the processor executing the computer code or instructions, the method of any of claims 1-10 being performed.

36. A communication device comprising a processor and interface circuitry for receiving computer code or instructions and transmitting to the processor, the processor executing the computer code or instructions, the method of any of claims 11-17 being performed.

37. A communication device comprising at least one processor coupled to at least one memory, the at least one processor configured to execute a computer program or instructions stored in the at least one memory, the method of any of claims 1-10 being performed.

38. A communication device comprising at least one processor coupled to at least one memory, the at least one processor configured to execute a computer program or instructions stored in the at least one memory, the method of any of claims 11-17 being performed.

39. A computer readable storage medium, having stored therein computer instructions which, when run on a computer, perform the method of any of claims 1-10.

40. A computer readable storage medium having stored therein computer instructions which, when run on a computer, perform the method of any of claims 11-17.