CN116896401A

CN116896401A - Method and system for determining communication beam of user terminal

Info

Publication number: CN116896401A
Application number: CN202310050209.8A
Authority: CN
Inventors: 邓勇志; 何诚亮; 戴利琼
Original assignee: Wuhan Shiju Information Technology Co ltd
Current assignee: Wuhan Shiju Information Technology Co ltd
Priority date: 2023-02-01
Filing date: 2023-02-01
Publication date: 2023-10-17
Anticipated expiration: 2043-02-01
Also published as: CN116896401B

Abstract

The application provides a method and a system for determining communication beams of a user terminal. Wherein the method comprises the following steps: receiving a beam measurement report sent by UE; judging whether the beam reported by the UE contains a first service beam or not according to the beam measurement report; when the first service beam is not contained, the first indication value of the service beam report in the beam report indication signaling is modified into the second indication value of the service beam report, and the modified beam report indication signaling is sent to the UE so that the UE reports the beam measurement report of the first service beam; judging whether the first service beam meets the service quality index of the UE according to the first beam measurement report; when the first service beam meets the service quality index of the UE, the first service beam is selected as a communication beam of the UE, and the selection result is sent to the UE. Therefore, the situation that the communication link is interrupted due to the fact that the beam jump occurs because the original service beam has good communication quality but is not reported by the UE can be avoided.

Description

Method and system for determining communication beam of user terminal

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and a system for determining a communication beam of a user terminal.

Background

The 5G (5 th Generation Mobile Communication Technology, fifth generation mobile communication technology) supports a high-frequency millimeter wave band and cannot cover the entire cell at a time without using an omni-directional antenna. The 5G communicates through a remote radio unit RRU (Remote Radio Unit, simply called RRU), schedules one beam direction at a time, and provides communication service by adopting a beam polling mode. Correspondingly, a User Equipment UE (UE for short) needs to measure a beam at the base station side for a long period of time and report a measurement result. And the base station selects the wave beam meeting the communication quality requirement according to the result of the UE measurement report so as to maintain the wave beam pair of the base station-UE and prevent the occurrence of link interruption. Specifically, the current 3GPP protocol supports beam reporting, and the number of beam reporting on the UE side is fixedly configured through RRC signaling. The UE reports the reference signal received power (Reference Signal Receiving Power, RSRP) of the measurement beam sequentially from large to small.

In implementing the prior art, the inventors found that:

when the even strong reflection path occurs, the RSRP of the original service beam is lower than that of the even beam. If the UE reports from large to small according to the RSRP measured by the beam, the UE may not report the beam list even if the quality of the original service beam chain is not weak, so that the base station side misjudges the current beam communication quality and performs beam switching. When the even strong reflection path disappears, the beam jumps again, and the link is interrupted.

Therefore, it is necessary to provide a technical solution capable of avoiding the interruption of the communication link due to the beam selection error caused by the occurrence of the strong reflection path.

Disclosure of Invention

The embodiment of the application provides a method and a system for determining a communication beam of a user terminal, which are used for solving the technical problem that a communication link is interrupted due to the fact that a beam selection error is caused by a strong reflection path.

Specifically, the method for determining the communication beam of the user terminal comprises the following steps:

receiving a beam measurement report set which is sent by a user terminal according to a beam reporting indication signaling and comprises a plurality of beam measurement reports; the beam reporting indication signaling comprises a service beam reporting indication value and a beam reporting number;

judging whether a plurality of beams reported by a user terminal contain a first service beam according to the received beam measurement report set, and obtaining a judging result of whether the first service beam is contained;

when the judging result is that the first service beam is not included, modifying the first indication value of the service beam report into a second indication value of the service beam report, and sending a beam report indication signaling including the second indication value of the service beam report to the user terminal so that the user terminal reports the beam measurement report of the first service beam according to the beam report indication signaling including the second indication value of the service beam report;

Receiving a beam measurement report of a first service beam reported by a user terminal;

judging whether the first service beam meets the service quality index of the user terminal according to the received beam measurement report;

when the first service beam meets the service quality index of the user terminal, the first service beam is selected as a communication beam of the user terminal;

and sending the selection result of the communication beam of the user terminal to the user terminal so that the user terminal can communicate with the base station by adopting the first service beam.

Further, the method further comprises:

when the judging result is that the first service beam is included, determining a reference signal receiving power value corresponding to each beam in a plurality of beams reported by the user terminal according to the beam measurement report set;

selecting the maximum reference signal receiving power value according to the reference signal receiving power value corresponding to each beam so as to determine the beam corresponding to the maximum reference signal receiving power value;

and selecting the beam corresponding to the maximum reference signal receiving power value as the communication beam of the user terminal.

Further, according to the received measurement report, determining whether the first service beam meets the quality of service index of the user terminal specifically includes:

Judging whether the first service beam meets the service quality index of the user terminal in a first time period according to the received measurement report;

and when the first service beam meets the service quality index of the user terminal in the first time length, obtaining a judgment result that the first service beam meets the service quality index of the user terminal.

Further, the method further comprises:

and when the first service beam does not meet the service quality index of the user terminal in the first time length, selecting a second beam from a plurality of beams reported by the user terminal as a communication beam of the user terminal.

Further, the method further comprises:

and when the first service beam does not meet the service quality index of the user terminal, selecting a second beam from a plurality of beams reported by the user terminal as a communication beam of the user terminal.

Further, the method further comprises:

according to the beam measurement report set, determining a reference signal receiving power value corresponding to each beam in a plurality of beams reported by a user terminal, and forming a first set by taking the reference signal receiving power value corresponding to each beam as an element;

determining a first element with the largest reference signal receiving power value in the first set to form a first subset of the first set;

Determining a second subset complementary to the first subset in the first set from the first subset;

calculating a reference signal received power difference value of each element in the first element and the second subset, and taking the calculated reference signal received power difference values as elements to form a second set;

determining whether elements larger than a first threshold value of a preset reference signal received power difference exist in the second set;

determining the number of elements in the second set, which are larger than the first threshold value, when the elements in the second set are larger than the first threshold value;

modifying the first reporting number of the beams in the beam reporting instruction signaling to the second reporting number of the beams according to the number of the elements larger than the first threshold in the second set, so that the user terminal selects the beam reporting of the second reporting number according to the beam reporting instruction signaling containing the second reporting number of the beams;

the first reporting number of the wave beams is larger than the second reporting number of the wave beams.

Further, the method further comprises:

when no element larger than the first threshold exists in the second set, determining a second element with the largest reference signal received power difference value in the second set;

Comparing the value of the second element with a second threshold value of a preset reference signal received power difference value;

when the value of the second element is smaller than the second threshold value, modifying the first reporting number of the beams in the beam reporting instruction signaling into the third reporting number of the beams, and sending the beam reporting instruction signaling containing the third reporting number of the beams to the user terminal, so that the user terminal selects the beam reporting of the third reporting number according to the beam reporting instruction signaling containing the third reporting number of the beams;

the first reporting number of the wave beams is smaller than the third reporting number of the wave beams.

Further, the difference between the third reporting number of the beam and the first reporting number of the beam is 1.

Further, the first reporting number of the wave beams in the wave beam reporting indication signaling is preset to be 2-4.

The embodiment of the application also provides a system for determining the communication beam of the user terminal.

Specifically, a system for determining a communication beam of a user terminal includes:

the receiving device is used for receiving a beam measurement report set which is sent by the user terminal according to the beam reporting indication signaling and comprises a plurality of beam measurement reports; the beam reporting indication signaling comprises a service beam reporting indication value and a beam reporting number;

The computing device is used for judging whether a plurality of beams reported by the user terminal contain the first service beam according to the received beam measurement report set, and obtaining a judging result of whether the first service beam is contained;

the signaling modifying device is used for modifying the first indication value reported by the service beam into a second indication value reported by the service beam when the judging result does not contain the first service beam, and sending a beam reporting indication signaling containing the second indication value reported by the service beam to the user terminal so that the user terminal reports the beam measurement report of the first service beam according to the beam reporting indication signaling containing the second indication value reported by the service beam;

the receiving device is further used for receiving a beam measurement report of the first service beam reported by the user terminal;

the computing device is further configured to determine, according to the received beam measurement report, whether the first service beam meets a quality of service indicator of the user terminal; and the first service beam is used for selecting the first service beam as a communication beam of the user terminal when the first service beam meets the service quality index of the user terminal;

and the sending device is used for sending the selection result of the communication beam of the user terminal to the user terminal so that the user terminal can communicate with the base station by adopting the first service beam.

The technical scheme provided by the embodiment of the application has at least the following beneficial effects:

according to the beam measurement report reported by the UE, whether the UE is in a scene with a strong reflection path can be determined, and the problem that a communication link is interrupted due to beam jump in the scene is prevented. In addition, the number of the beam reports of the UE can be dynamically regulated, so that the number of the beam reports of the UE side is always in an optimal configuration, the poor integrity of beam measurement results caused by unreported high-energy beams can be avoided, and the occupation of communication resources by low-energy beam reports can be avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

fig. 1 is a schematic diagram of a scenario of normal communication of a selected beam between a UE and a base station according to an embodiment of the present application;

fig. 2 is a schematic diagram of a scenario in which beams are selected for communication between a UE and a base station in a scenario in which a strong reflection path is implemented according to an embodiment of the present application;

fig. 3 is a flow chart of a method for determining a communication beam of a user terminal according to an embodiment of the present application;

Fig. 4 is a block diagram of a beam reporting indication signaling according to an embodiment of the present application;

fig. 5 is a decision flowchart of a method for determining a communication beam of a user terminal according to an embodiment of the present application;

fig. 6 is a schematic diagram of a scenario in which a UE and a base station select beams for communication due to shielding by a shielding object according to an embodiment of the present application;

fig. 7 is a schematic flow chart of dynamic adjustment of the number of UE beam reports according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a system for determining a communication beam of a user terminal according to an embodiment of the present application.

Description of the embodiments

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It can be understood that, at present, the number of beam reports on the UE side is fixedly configured by RRC signaling in the beam reporting supported by the 3GPP protocol. The UE reports the RSRP of the measuring beam from large to small in sequence. However, when the coupling strong reflection path occurs, the RSRP of the original service beam is lower than that of the coupling beam. As shown in fig. 1, beam2 is used as a service Beam between a base station and a UE. However, when the vehicle suddenly passes, as shown in fig. 2, the large surface area of the glossy metal may generate strong reflection, and some concave surfaces may even bring about an effect of energy concentration. At this time, the RSRP of Beam3 is higher than that of Beam 2. That is, the RSRP of the original service Beam (Beam 2) is lower than the RSRP of the Beam (Beam 3) at the occasion. If the UE still reports from large to small according to the RSRP measured by the Beam, the UE may still not report the Beam list even if the original service Beam link quality is not weak, so that the base station side may misjudge the original Beam communication quality, and switch the communication Beam from Beam2 to Beam3. When the occasional strong reflection path disappears, the beam will hop again, thereby causing the communication link between the base station and the UE to break. In this way, the communication efficiency between the base station and the UE is certainly reduced. Therefore, when the base station receives the beam measurement result reported by the UE, it needs to determine whether the relevant beam reported by the UE is accurate according to the received relevant content, so as to determine the beam specifically adopted for communication between the UE and the base station. That is, it is determined whether the UE has a false alarm/missing alarm situation, so as to avoid the communication link interruption caused by the misjudgment of the base station on the communication quality of the original service beam.

Specifically, referring to fig. 3, a method for determining a communication beam of a user terminal according to an embodiment of the present application includes the following steps:

s100: receiving a beam measurement report set which is sent by a user terminal according to a beam reporting indication signaling and comprises a plurality of beam measurement reports; the beam reporting indication signaling comprises a service beam reporting indication value and a beam reporting number.

The beam report instruction signaling may be understood as MAC CE (MAC Control Element, abbreviated as MAC CE) signaling sent by the base station to the UE for instructing the UE to perform beam report, and is used for exchanging MAC layer control information between the base station and the UE. The beam reporting indication signaling comprises: the service beam reports the indicated value and the number of the beam reports. The number of the beam reporting may be understood as a certain value preset at the base station side, which represents the number of the beams to be reported by the UE. The UE can report the corresponding number of beams according to the number of the beams. The service beam reporting instruction value can be understood as a certain value preset at the base station side, and is used for instructing the UE to execute a beam reporting policy corresponding to the preset value. The beam reporting policy herein may be understood as whether the RSRP measurement result of the original service beam must be included in the beam measurement report reported by the UE.

Specifically, when the service beam reporting instruction value is the first instruction value, the UE reports the beam measurement report, which does not necessarily include the RSRP measurement result of the original service beam. That is, the relevant RSRP measurement result of the beam measurement report reported by the UE is that the UE reports the measurement result from large to small according to the actually measured RSRP of the relevant beam according to the 3GPP protocol. When the RSRP measurement result of the original service beam is lower and the number of the reported beams is out of the range, the relevant RSRP measurement result of the beam measurement report reported by the UE does not contain the RSRP measurement result of the original service beam. However, when the RSRP measurement result of the original service beam is low but still within the number of reported beams, the relevant RSRP measurement result of the beam measurement report reported by the UE includes the RSRP measurement result of the original service beam. In the preferred embodiment provided by the application, the preset service beam reporting instruction value at the base station side is a first instruction value.

When the serving beam reporting indication value is the second indication value, the UE must include the RSRP measurement result of the original serving beam in the beam measurement report. That is, the relevant RSRP measurement results of the beam measurement report reported by the UE must have the RSRP measurement results of the original service beam, regardless of the level of the RSRP measurement results of the original service beam. At this time, other beams may report the measurement result in a manner of measuring RSRP from large to small. That is, the beam measurement report received by the base station at this time must include the RSRP measurement results of the original service beam, and the measurement results of the other beams can be reported in sequence from large to small according to the measured RSRP.

When the UE receives the beam reporting instruction signaling issued by the base station, the beam measurement report of the related beam can be reported according to the beam reporting strategy and the beam reporting number in the signaling. The measurement report for each beam includes the RSRP measurement of that beam measured by the UE. In addition, a beam identifier for each beam may also be included. Based on the beam identifier, the base station may determine information about the beam, and may be configured to identify whether the beam reported by the UE includes the original serving beam. The beam measurement report set in the present application is understood to be a set including all beam measurement reports, which is formed by taking the measurement report of each beam as an element. And the specific number of the elements is consistent with the beam reporting number value in the beam reporting indication signaling.

In a specific embodiment of the present application, a structure of beam reporting indication signaling is shown in fig. 4. Wherein, the Rpt Mod can be understood as a service beam reporting indication value in a beam reporting indication signaling, which occupies 1bit; the Report Beam Num can be understood as the number of Beam reports in the Beam Report indication signaling, which occupies 7 bits. When the Rpt Mod is set to 0, the UE will report the measurement result from large to small according to the measurement RSRP according to the 3GPP protocol. When Rpt Mod is set to 1, the first reporting beam of the UE is the RSRP result measured by the original service beam; the rest beams report the measurement results from large to small according to the measured RSRP. And, the base station defaults to Rpt Mod to 0. I.e. the indication value 0 is reported on the beam preset by the base station. When the original service beam does not exist in the beams reported by the UE, the Rpt Mod is modified to be 1 so as to force the UE to report the measurement report of the original service beam. When the UE receives a beam reporting instruction with Rpt Mod of 1, a measurement report of an original service beam is reported. The Report Beam Num is used for indicating the number of beams reported by the terminal each time, the indication range is from 0 to 127, and the Report Beam Num can be flexibly set to corresponding values according to actual application scenes. For example, the number of preset beam reports on the base station side is 5. When the UE receives a beam reporting instruction with the number of beam reporting being 5, 5 beam measurement reports are reported. It should be noted that, whether the 5 beam measurement reports reported by the UE include the measurement report of the original service beam depends on whether the service beam reporting indication value in the beam reporting indication signaling received by the UE is 0 or 1.

S200: and judging whether the plurality of beams reported by the user terminal contain the first service beam according to the received beam measurement report set, and obtaining a judging result of whether the plurality of beams contain the first service beam.

It can be understood that, the UE will execute a corresponding beam reporting policy and report a corresponding number of beam measurement reports according to the beam reporting indication signaling that the service beam reporting indication value issued by the base station is the first indication value. At this time, when the RSRP of the original service beam is lower and is out of the reporting beam number range, the RSRP measurement result related to the beam measurement report reported by the UE does not include the RSRP measurement result of the original service beam. It is clear from this that the measurement report set sent by the UE and received by the base station does not necessarily include the measurement report of the original service beam. At this time, the base station cannot acquire the communication quality of the original service beam. Particularly, when there is a strong reflection path for communication between the UE and the base station, the base station cannot determine the communication quality of the original service beam, so that misdetermination of the communication quality of the original beam may be caused. In this way, when the occasional strong reflection path disappears, the UE communication beam will hop again, thereby causing link interruption, which is unfavorable for the communication between the UE and the base station so far. Therefore, after receiving the beam measurement report sent by the UE, the base station needs to determine whether the original service beam is located in the beam sequence reported by the UE, so that whether the communication quality of the original service beam is affected by the emergent strong reflection path or not is facilitated, and the base station is prevented from misjudging the communication quality of the original service beam.

The first service beam is here understood to be the original service beam. The base station may determine, according to the beam identifier, whether an original service beam exists in a plurality of beams reported by the UE. And when the base station does not match the beam identifier of the original service beam in the service beam reported by the UE, obtaining a judgment result that the beam reported by the user terminal does not contain the first service beam. Correspondingly, when the base station matches the beam identifier of the original service beam in the service beam reported by the UE, a judgment result that the beam reported by the user terminal contains the first service beam is obtained.

S300: when the judging result is that the first service beam is not included, the first indication value of the service beam report is modified into a second indication value of the service beam report, and the beam report indication signaling including the second indication value of the service beam report is sent to the user terminal, so that the user terminal reports the beam measurement report of the first service beam according to the beam report indication signaling including the second indication value of the service beam report.

S400: and receiving a beam measurement report of the first service beam reported by the user terminal.

When the judgment result is that the first service beam is not included, the RSRP measurement result of the original service beam is lower, and the RSRP measurement result is not in the selection range of the beam reported by the UE. However, in order to determine whether the scene where the UE is located has a strong reflection path, the base station still needs to acquire a measurement result of the original service beam.

It can be understood that the first indication value reported by the service beam is a default indication value reported by the service beam at the base station side, and indicates the UE to report the measurement result from large to small according to the actually measured RSRP of the relevant beam. When the beam reported by the UE does not contain the original service beam, the first indication value reported by the service beam can be modified into the second indication value reported by the service beam, so that the UE is forced to report the original service beam to the base station to judge whether the interference of the emergent strong reflection path exists. It is worth noting that the application focuses on solving the determination of the communication beam in the scene of the emergent strong reflection path, but when the scene of the emergent strong reflection path is not at all emergent in the actual application scene, the service beam reporting indication value can be modified according to the actual situation setting. That is, it may be selected to always keep this value at 0.

And when the service beam reporting instruction value is modified, the base station transmits the modified beam reporting instruction signaling to the UE. Correspondingly, the UE will report the original service beam measurement report. The base station may correspond to receiving a measurement report of the original serving beam.

Further, in a preferred embodiment of the present application, the method for determining a communication beam of a user terminal further includes: when the judging result is that the first service beam is included, determining a reference signal receiving power value corresponding to each beam in a plurality of beams reported by the user terminal according to the beam measurement report set; selecting the maximum reference signal receiving power value according to the reference signal receiving power value corresponding to each beam so as to determine the beam corresponding to the maximum reference signal receiving power value; and selecting the beam corresponding to the maximum reference signal receiving power value as the communication beam of the user terminal.

When the judging result is that the first service beam is included, the RSRP measurement result of the original service beam is higher, and the RSRP measurement result is still located in the selection range of the beam reported by the UE. At this time, there is no disturbance that occurs in the strong reflection path. At this point, the base station will perform a general beam switching strategy. Namely, according to the RSRP measurement result of the beam reported by the UE, selecting the beam corresponding to the maximum RSRP measurement result as the UE communication beam to be switched. And then, the communication between the UE and the base station is performed through the beam corresponding to the maximum RSRP measurement result.

S500: and judging whether the first service beam meets the service quality index of the user terminal according to the received beam measurement report.

The quality of service indicator herein may be understood as the quality of service requirement of the communication beam between the base station and the UE. Specifically, the determination may be based on RSRP measurement results of the communication beam. For example, when the RSRP measurement result of the first service beam is higher than the preset RSRP threshold, it is indicated that the first service beam may still meet the communication quality requirement of the UE. However, when the RSRP measurement result of the first service beam is lower than the preset RSRP threshold, it is indicated that the first service beam cannot meet the communication quality requirement of the UE, and beam switching is required.

S600: when the first service beam meets the service quality index of the user terminal, the first service beam is selected as the communication beam of the user terminal.

S700: and sending the selection result of the communication beam of the user terminal to the user terminal so that the user terminal can communicate with the base station by adopting the first service beam.

When the first service beam meets the service quality index of the user terminal, the communication link quality of the first service beam still meets the communication requirement between the UE and the base station. At this time, beam switching is not required to be performed. I.e. communication can continue through the original service beam. In this way, the interruption of the communication link between the UE and the base station caused by the emergent strong reflection path of the burst can be effectively avoided. At this time, the base station will issue the result of beam selection to the UE, so that the UE can continue to use the original service beam to perform communication with the base station.

Further, in a preferred embodiment of the present application, the method for determining a communication beam of a user terminal further includes: and when the first service beam does not meet the service quality index of the user terminal, selecting a second beam from a plurality of beams reported by the user terminal as a communication beam of the user terminal.

When the first service beam does not meet the service quality index of the user terminal, the communication quality of the first service beam is poor. If the original service beam is still adopted for communication no matter whether the emergent strong reflection path exists or not, the timely transmission of the information between the UE and the base station cannot be ensured. Therefore, when the first service beam does not meet the quality of service index of the user terminal, beam switching needs to be performed in time to ensure connection stability between the UE and the base station.

Specifically, the base station may perform a general beam switching strategy. Namely, according to the RSRP measurement result of the beam reported by the UE, selecting the beam corresponding to the maximum RSRP measurement result as the UE communication beam to be switched. And then, the communication between the UE and the base station is performed through the beam corresponding to the maximum RSRP measurement result. The beam corresponding to the maximum RSRP measurement result is the second beam of the present application.

Further, in a preferred embodiment of the present application, determining whether the first service beam meets the quality of service indicator of the ue according to the received measurement report specifically includes: judging whether the first service beam meets the service quality index of the user terminal in a first time period according to the received measurement report; and when the first service beam meets the service quality index of the user terminal in the first time length, obtaining a judgment result that the first service beam meets the service quality index of the user terminal.

The first duration may be preset according to the actual scenario. The higher the preset value of the first duration, the higher the judgment requirement on the first service beam. It can be appreciated that the UE is in the process of moving and the specific communication scenario with the base station is in the process of changing constantly. It should be noted that, by using the RSRP measurement result of the original service beam reported by the UE, the communication quality of the original service beam in a certain moment can be determined. However, when the UE moves and there is a shelter between the UE and the base station, the communication quality of the original service beam will be affected, so that the communication requirement between the UE and the base station cannot be satisfied. In this case, if the original beam is used for communication, the communication quality between the two is certainly degraded. Or, when the emergent strong reflection path between the UE and the base station exists all the time, if the clock adopts the original service beam communication, the communication quality between the UE and the base station will be definitely reduced. At this time, other beams with better RSRP measurement results can be selected for communication between the UE and the base station, so that the communication quality can be better when the even strong reflection path always exists. That is, by monitoring the quality of service of the first service beam within a certain period of time, the UE and the base station can have better communication quality when the duration of the recurrent strong reflection path is longer. Therefore, by monitoring whether the first service beam can always meet the service quality of the UE within a certain time length, the technical problem of low communication quality between the UE and the base station in a scene with long duration of the emergent strong reflection path or a shelter can be solved.

If the first service beam meets the service quality index of the user terminal in the first time period, a judgment result that the first service beam meets the service quality index of the user terminal is correspondingly obtained. In this way, the RSRP measurement result of the first service beam can always meet the communication requirement of the UE, and at this time, the operation of beam switching is not required to be performed. Communication between the base station and the UE is still via the first service beam.

Further, in a preferred embodiment of the present application, the method for determining a communication beam of a user terminal further includes: and when the first service beam does not meet the service quality index of the user terminal in the first time length, selecting a second beam from a plurality of beams reported by the user terminal as a communication beam of the user terminal.

When the first service beam does not meet the service quality index of the UE within the first duration, the communication quality stability of the first service beam within the first duration is poor, and the communication quality requirement of the UE cannot be continuously met. At this time, if the original service beam is still used for communication, timely transmission of information between the UE and the base station cannot be guaranteed. Therefore, when the first service beam cannot meet the quality of service index of the user terminal within the first time period, beam switching needs to be performed in time to ensure connection stability between the UE and the base station.

Referring to fig. 5, in a specific embodiment of the present application, a base station side presets a service beam reporting indication value of 0 and a beam reporting number of 2 in a beam reporting indication signaling. That is, the UE is instructed to report two beams, and the reported relevant RSRP measurement result of the beam measurement report is that the UE reports the measurement result according to the 3GPP protocol from large to small according to the actually measured RSRP of the relevant beam, and the UE does not necessarily include the first service beam (the original service beam).

After receiving the beam reported by the UE, it is first necessary to determine that the beam reported by the UE includes the first service beam (the original service beam). If the first service beam is included, the service beam is selected according to a general beam switching strategy. Specifically, according to the RSRP measurement result of the beam reported by the UE, the beam corresponding to the maximum RSRP measurement result is selected as the UE communication beam to be switched. And then, the communication between the UE and the base station is performed through the beam corresponding to the maximum RSRP measurement result. However, if the beam reported by the UE does not include the original service beam, there may be a potentially occurring strong reflection path, and it needs to be determined whether the current reported beam is authentic. At this time, the service beam reporting instruction value is modified to be 1, so that the UE side is forced to report the RSRP measurement result of the original service beam, and the base station is assisted to further judge the current scene. Correspondingly, the base station can receive the RSRP measurement result of the original service beam reported by the UE. If the communication quality of the original service beam is deteriorated, the original service beam is blocked. At this time, beam switching needs to be performed. Specifically, according to the RSRP measurement result of the beam reported by the UE, the beam corresponding to the maximum RSRP measurement result is selected as the UE communication beam to be switched. And then, the communication between the UE and the base station is performed through the beam corresponding to the maximum RSRP measurement result. If the communication quality of the original service beam is not deteriorated, the strong reflection path appears, and whether the beam exists for a long time or not needs to be judged and can be used. If the original service beam exists for a long time and can be used, the first service beam is still selected as a communication beam between the UE and the base station. However, if the original service beam is not used for a long time, beam switching needs to be performed. Specifically, according to the RSRP measurement result of the beam reported by the UE, the beam corresponding to the maximum RSRP measurement result is selected as the UE communication beam to be switched. And then, the communication between the UE and the base station is performed through the beam corresponding to the maximum RSRP measurement result.

According to the above, by modifying the service beam indication value in the beam reporting indication signaling, it can be assisted to determine whether the original service beam can meet the communication between the UE and the base station, so as to determine whether to perform the beam switching operation, so as to ensure the stability of the communication link between the UE and the base station. And the process is mainly performed according to measurement reports of a plurality of beams reported by the UE. In order to be able to quickly determine the beam of the communication between the UE and the base station, it is required that the UE be able to quickly transmit a beam measurement report to the base station side. The speed of the UE sending the beam measurement report is related to the number of beams to be reported by the UE. And, the number of beams reported by the UE is generally fixed. However, it should be noted that when the number of UE beams is required to report is large, but the energy of most of the beams is relatively low, most of the beams with low energy need not be reported. However, the UE will still report all beams. At this time, the channel resource overhead of beam reporting is greatly increased, and the sending speed of the beam measurement report is reduced. For example, in the Line of Sight (Los) scenario of fig. 1, beam2 will be used as the service Beam because there is no obstruction between the base station and the UE. At this time, the service beam direction is stable, the signal quality is good, and only a small number of beams need to be reported. If the number of configured reporting beams is too large, too many beam channel resources and uplink control channel resources will be occupied.

Or when the number of the beams reported by the configured UE is low, but a plurality of communication paths with close beam quality exist, the beam measurement report with the smaller number reported by the UE cannot completely reflect the beam measurement result at the UE side. At this time, the selection range of the alternative beam at the base station side is reduced, which is unfavorable for keeping the integrity of the communication link between the UE and the base station. For example, referring to fig. 6, when the UE moves near the building, the base station and the UE will be changed into a non-line-of-sight wireless transmission nLos (Non Line of Sight, abbreviated as nLos) scene, and due to the presence of the obstruction between the base station and the UE, the reflection of Beam3 will be mainly relied on to provide communication services. At this time, communication between the UE and the base station mainly depends on beam reflection. However, since the beams are easy to hop, the UE needs to report as many beams as possible. If the number of the configured reporting beams is too small, beam hopping will occur, and there is a risk of communication link interruption.

Therefore, when the UE and the terminal are in different scenes, the number of the beams reported by the UE is configured to be a certain fixed value, and the technical problem of occupying multiple communication resources/communication link terminals exists.

Further, in a preferred embodiment of the present application, the method for determining a communication beam of a user terminal further includes:

determining, from the first subset, a second subset in the first set that is complementary to the first subset;

according to the number of elements larger than a first threshold value in the second set, modifying the first reporting number of the beams in the beam reporting instruction signaling into the second reporting number of the beams, so that the user terminal selects the beam reporting of the second reporting number according to the beam reporting instruction signaling containing the second reporting number of the beams; the first reporting number of the wave beams is larger than the second reporting number of the wave beams.

The first set may be understood as a set of RSRP measurement data containing RSRP measurement results corresponding to each beam reported by the UE. The RSRP measurement result corresponding to each beam reported by the UE is a component element of the data set. From the RSRP measurement data set, an RSRP measurement result in which the numerical value is the largest can be determined. The RSRP measurement result reported by the UE and having the largest value is referred to herein as the first element. The data set constituted by the first elements is referred to as a first subset. That is, from the RSRP measurement result with the largest value reported by the UE, a first subset of the first set (RSRP measurement data set) may be obtained. Correspondingly, in the first set (RSRP measurement data set), RSRP measurement results having other values smaller than the first element value will constitute the second subset. And the first subset is complementary to the second subset. By calculating the difference value of each element in the first element and the second subset, the difference value between the RSRP measurement result with the largest value and other RSRP measurement results can be obtained respectively, and a second set formed by the difference values is obtained.

The first threshold of the reference signal received power difference may be understood as a threshold preset at the base station side for determining whether the number of reports at the UE side needs to be reduced. That is, the method is used for judging whether the beam which has lower beam energy and does not need to be reported exists in the beams reported by the UE. It will be appreciated that differencing each RSRP measurement reported by the UE (the largest value RSRP measurement minus the other RSRP measurements in turn) will result in a calculation with several different differences. And if the certain difference value is larger than the first threshold value, indicating that the beam energy corresponding to the subtracted number is intersected and does not need to be reported. That is, if the second set includes elements greater than the first threshold of the preset reference signal received power difference, it is indicated that there is a beam energy intersection in the beams reported by the UE and no beam need to be reported. And by counting the number of elements larger than the first threshold value in the second set, the specific number of low-energy beams existing in the beams reported by the UE can be determined, so that the specific value of the number of the beams reported in the beam reporting indication signaling is conveniently determined. For example, the number of beam reports may be modified to a value obtained by subtracting a specific number of low energy beams present in the beams reported by the UE.

It is noted that, the number of beam reporting in the beam reporting indication signaling provided by the present application can be modified in real time according to actual conditions, and is not fixedly configured. Of course, the base station side is preset with an initial default value. That is, a default first reporting number of beams is preset at the base station side. When the low-energy beam exists in the beam reported by the UE according to the beam measurement report reported by the UE, the first reporting number of the beam can be modified into the second reporting number of the beam according to the actual situation. The first reporting number of beams is larger than the second reporting number of beams because the number of beams with too low beam energy is subtracted from the first reporting number of beams. Therefore, the beam reported by the UE can be screened, and the reporting of the low-energy beam is avoided, so that the excessive occupation of the UE on the beam channel resources and the uplink control channel resources is reduced, and the waste of communication resources is avoided. Of course, if the UE continues to report the beam according to the modified beam second indicator value, there is still a beam with low energy, and updating of the beam reporting second indicator value will be continued. Namely, according to the beam measurement result reported by the UE, the beam reporting second indication value in the beam reporting indication signaling is dynamically updated.

when no element larger than the first threshold exists in the second set, determining a second element with the largest difference value of the reference signal received power in the second set;

when the value of the second element is smaller than the second threshold value, modifying the first reporting number of the beams in the beam reporting instruction signaling into the third reporting number of the beams, and sending the beam reporting instruction signaling containing the third reporting number of the beams to the user terminal, so that the user terminal selects the beam reporting of the third reporting number according to the beam reporting instruction signaling containing the third reporting number of the beams; the first reporting number of the wave beams is smaller than the third reporting number of the wave beams.

It can be understood that when no element greater than the first threshold exists in the second set, it is indicated that the difference is made between the RSRP measurement results reported by the UE (the RSRP measurement result with the largest value subtracts the other RSRP measurement results in sequence), and a situation that several different difference values do not exist and are greater than the first threshold is indicated that the beam energy corresponding to the subtracted number is higher. However, in this case, it cannot be excluded whether or not the number of beam reporting is set low, so that when the UE performs beam reporting, there are cases where other beams with energy approaching are missed. In this way, the base station side is not benefited to fully know the optional beam of the UE.

In particular, when the communication quality of the fewer beams reported by the UE is unstable and a jump occurs, fewer beams can be provided for the alternative base station, thereby causing interruption of the communication link between the UE and the base station. For example, in a non line-of-sight transmission nLos scenario, the reflected beam will be relied primarily on to provide communication services due to the presence of an obstruction between the base station and the UE. If the beam hops, the UE needs to report as many beams as possible. However, since the number of configured reporting beams is too small, the base station cannot switch to the rest of the candidate beams, thereby causing interruption of the communication link. Therefore, it is also required to determine, according to the beam measurement result reported by the UE, whether the number of beams reported by the UE is too small, so as to avoid a terminal of a communication link between the UE and the base station.

And determining the two beams with the largest difference of RSRP measurement results in the beams reported by the UE by determining the second element with the largest difference of reference signal received power in the second set. The second threshold of the reference signal received power difference in the present application may be understood as a threshold preset at the base station side for determining whether to increase the number of reports at the UE side. That is, there is a case where other beams with close quality are not reported by the UE because the number of beam reports configured on the UE side is small.

And when the value of the second element is smaller than the second threshold value, the fact that the RSRP measurement results corresponding to the two beams with the largest difference between the RSRP measurement results in the beams reported by the UE are relatively close is indicated. At this time, there may be other beams that are not reported due to the limit of the number of beam reporting. At this time, the number of beam reporting in the beam reporting instruction signaling can be adaptively increased according to an actual communication scene. Namely, the first reporting number of the default beam preset at the base station side is modified into the third reporting number of the beam. And the number of the beams with other energy approaching is increased on the basis of the number of the first reports of the beams, so that the number of the first reports of the beams is smaller than the number of the third reports of the beams. Therefore, whether the number of the beams reported by the UE is too small is judged, so that the UE side is prevented from missing other beams with close energy, and the base station side is ensured to be capable of comprehensively knowing the alternative beams with the UE. Particularly, when beam hopping occurs, the integrity of a communication link between the UE and the base station can be ensured, and the communication quality between the UE and the base station is effectively ensured.

It should be noted that, the third reporting number of the beam may be set based on the first reporting number of the beam according to an actual application scenario or working experience. For example, 2 is sequentially increased based on the first reporting number of the beam. That is, the UE is caused to report two more beams at the next beam report. And, according to the newly reported beam measurement report, the base station side can decide whether to continue to increase the number of beam reporting. For example, when it is found that there is a low-energy beam in the beam reported by the UE according to the beam measurement report reported by the UE, the number of beam reporting is reduced. However, if it is found that the beam with the energy close to that of the UE side is not reported according to the beam measurement report recently reported by the UE, the number of beam reporting is continuously increased until a beam with low capability exists in the beams reported by the UE. Therefore, the method and the device realize the dynamic adjustment of the number of the beam reports according to the beam measurement report reported by the UE, thereby effectively balancing the number of the beam reports and the communication resources occupied by the beam reports and effectively improving the communication quality between the UE and the base station.

Further, in a preferred embodiment of the present application, a difference between the third reporting number of the service beam and the first reporting number of the service beam is 1.

The difference between the third reporting number of the wave beams and the first reporting number of the wave beams is set to be 1, namely one wave beam is added each time on the basis of the first reporting number of the wave beams. That is, the UE reports one more beam than the previous one according to the beam reporting instruction signaling sent by the base station. Therefore, the UE can uniformly and progressively update the third reporting number of the wave beams so as to avoid excessive channel resources occupied by the wave beam reporting due to overlarge progressive value setting. Meanwhile, the updating operation of the second reporting number of the wave beams, which is required to be executed by the base station side due to overlarge progressive value setting, can be avoided, and the operation flow of the base station side is simplified.

Further, in a preferred embodiment of the present application, the number of first reports of the beam in the beam report indication signaling is preset to be 2-4.

The setting of the number of the first reports of the beam to 2-4 mainly considers that different application scenarios exist between the UE and the base station due to mobility of the UE. For example, due to mobility of the UE, there are often Los scenarios and nLos scenarios between the UE and the base station. In Los scene, as no shielding object exists between the UE and the base station, the service beam direction is stable, the signal quality is good, and the number of reporting beams is not required to be configured too much. Through experiments, the number of the first reporting of the UE beams in the Los scene is set to be 2, so that communication resources such as beam channel resources, uplink control channel resources and the like occupied by the UE for reporting the beams can be effectively saved. However, in nLos scenario, the UE and the base station communicate mainly by reflected beam due to the presence of the obstruction between the UE and the base station. In this case, if the number of beam reports to be configured is small, the beam is likely to transmit a hop, which may cause a communication link terminal between the UE and the base station. Through experiments, the first reporting number of the UE beams in the nLos scene is set to be 4, so that the communication resources such as beam channel resources, uplink control channel resources and the like occupied by the beam reporting can be reduced on the premise of ensuring that the communication link between the UE and the base station is not in. Therefore, the application preferably presets the first reporting number of the wave beams to be 2-4.

Referring to fig. 7, in a specific embodiment of the present application, a base station side presets a service beam reporting indication value of 0 and a beam reporting number of M in a beam reporting indication signaling. That is, the UE is instructed to report M beams, and the reported RSRP measurement results of the beam measurement report are reported by the UE according to the 3GPP protocol from large to small according to the actually measured RSRP of the relevant beam. And on the premise that the service beam meets the quality of a communication link between the UE and the base station, receiving a beam measurement report reported by the UE at a certain moment. At this time, the RSRP measurement result with the largest value is determined from the RSRP value of each beam measured by the UE. Then, the difference between the maximum RSRP and the other RSRP values can be calculated. And determining whether a beam with too low energy exists in the beams reported by the UE according to the calculated plurality of differences and a first Threshold1 of the preset reference signal received power difference. Specifically, the presence of a value exceeding Threshold1 in the calculated differences indicates that there is more beam energy that is too low. These low energy beams are not needed to be reported. Correspondingly, the calculated values of the differences are smaller than the Threshold1, and the corresponding beam energy is higher and needs to be reported. Therefore, when there are values exceeding Threshold1 in the calculated differences, the number of beam reports can be determined by determining the number N of values smaller than Threshold 1. That is, M is modified to N. And then, continuing the beam reporting process, and dynamically updating the number of the beams according to the illustrated flow.

However, if there is no value exceeding Threshold1 in the calculated differences, it indicates that the beam energy reported by the UE is high. At this time, it is required to determine whether the number of beam reporting is limited by the preset value M of the number of beam reporting being too low, so as to prevent a plurality of communication paths with close beam quality at the UE. Specifically, the maximum difference value among the difference values between the RSRP of the calculated maximum value and other RSRP values corresponds to the RSRP of the maximum value and the RSRP of the minimum value. And comparing the maximum difference value with a second Threshold2 of the preset reference signal received power difference value, and determining whether a beam with energy close to that of the UE side is not reported. When the maximum difference is below Threshold2, the RSRP indicating the maximum value is closer to the RSRP of the minimum value. At this time, there is a high possibility that the beam with the near energy is not reported at the UE side. Therefore, the number P of beam reports needs to be increased based on the number M of beam reports. That is, the update beam report number M is (m+p). And then, continuing the beam reporting process, and dynamically updating the number of the beams according to the illustrated flow.

When the RSRP difference value exceeding Threshold1 is obtained according to the latest reported beam measurement report of the UE, the number of the beam reports is reduced in time so as to avoid the occupation of communication resources such as beam channel resources, uplink control channel resources and the like by the low-energy beam reports. Similarly, in the process of reducing the number of beam reporting, when the RSRP difference value lower than Threshold2 exists according to the latest reported beam measurement report of the UE, the number of beam reporting should be increased in time, so as to avoid that a plurality of communication paths with close beam quality exist at the low UE side but are not reported. Through the dynamic adjustment of the number of the beam reporting, the number of the beam reporting is always in the optimal configuration, so that the beam which is not reported can not exist, and communication resources occupied by the beam reporting can be saved.

The embodiment of the application also provides a system 100 for determining the communication beam of the user terminal, which is used for executing the method for determining the communication beam of the user terminal.

Specifically, a system 100 for determining a communication beam of a user terminal includes:

a receiving device 11, configured to receive a beam measurement report set including a plurality of beam measurement reports sent by a user terminal according to a beam reporting indication signaling; the beam reporting indication signaling comprises a service beam reporting indication value and a beam reporting number;

the computing device 12 is configured to determine, according to the received beam measurement report set, whether a plurality of beams reported by the user terminal include the first service beam, and obtain a determination result of whether the first service beam is included;

the signaling modifying device 13 is configured to modify the first indication value reported by the service beam into a second indication value reported by the service beam when the determination result is that the first service beam is not included, and send a beam reporting indication signaling including the second indication value reported by the service beam to the user terminal, so that the user terminal reports the beam measurement report of the first service beam according to the beam reporting indication signaling including the second indication value reported by the service beam;

The receiving device 11 is further configured to receive a beam measurement report of the first service beam reported by the user terminal;

the calculating means 12 is further configured to determine, according to the received beam measurement report, whether the first service beam meets a quality of service indicator of the user terminal; and the first service beam is used for selecting the first service beam as a communication beam of the user terminal when the first service beam meets the service quality index of the user terminal;

and the transmitting device 14 is used for transmitting the selection result of the communication beam of the user terminal to the user terminal so that the user terminal can communicate with the base station by adopting the first service beam.

Further, in a preferred embodiment provided by the present application, the computing device 12 is further configured to:

Further, in a preferred embodiment of the present application, the calculating means 12 is configured to determine, according to the received measurement report, whether the first service beam meets a quality of service indicator of the user terminal, specifically:

Further, in a preferred embodiment provided by the present application, the computing device 12 is further configured to: and when the first service beam does not meet the service quality index of the user terminal in the first time length, selecting a second beam from a plurality of beams reported by the user terminal as a communication beam of the user terminal.

Further, in a preferred embodiment provided by the present application, the computing device 12 is further configured to: and when the first service beam does not meet the service quality index of the user terminal, selecting a second beam from a plurality of beams reported by the user terminal as a communication beam of the user terminal.

the signaling modifying device 13 is further configured to modify, according to the number of elements in the second set that is greater than the first threshold, the first reporting number of beams in the beam reporting instruction signaling to the second reporting number of beams, so that the user terminal selects, according to the beam reporting instruction signaling including the second reporting number of beams, beam reporting of the second reporting number; the first reporting number of the wave beams is larger than the second reporting number of the wave beams.

comparing the value of the second element with a second threshold value of a preset reference signal received power difference value to determine whether the number of the beams reported by the user terminal meets the number index of the beams reported by the user terminal;

the signaling modifying device 13 is further configured to modify the first reporting number of beams in the beam reporting indication signaling to the third reporting number of beams, and send the beam reporting indication signaling containing the third reporting number of beams to the user terminal, so that the user terminal selects the third reporting number of beams to report according to the beam reporting indication signaling containing the third reporting number of beams; the first reporting number of the wave beams is smaller than the third reporting number of the wave beams.

Further, in a preferred embodiment of the present application, the difference between the third reporting number of the beam and the first reporting number of the beam is 1.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement "comprises" or "comprising" an element defined by … … does not exclude the presence of other identical elements in a process, method, article or apparatus that comprises the element.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims

1. A method for determining a communication beam of a user terminal, comprising the steps of:

2. The method for determining a communication beam for a user terminal of claim 1, wherein the method further comprises:

3. The method for determining a communication beam of a ue according to claim 1, wherein determining whether the first service beam meets a quality of service indicator of the ue according to the received measurement report comprises:

4. A method of determining a communication beam for a user terminal as claimed in claim 3, the method further comprising:

5. The method for determining a communication beam for a user terminal of claim 1, wherein the method further comprises:

6. The method for determining a communication beam for a user terminal of claim 1, wherein the method further comprises:

7. The method for determining a communication beam for a user terminal of claim 6, wherein the method further comprises:

8. The method of determining a communication beam of a ue according to claim 7, wherein a difference between the third reporting number of the beam and the first reporting number of the beam is 1.

9. The method for determining a communication beam of a user terminal according to claim 6, wherein the number of first reports of the beam in the beam report instruction signaling is preset to 2-4.

10. A system for determining a communication beam for a user terminal, comprising: