WO2022262480A1

WO2022262480A1 - Serving cell handover method and apparatus, and serving cell determination method and apparatus

Info

Publication number: WO2022262480A1
Application number: PCT/CN2022/092108
Authority: WO
Inventors: 闫哲; 闫琦; 张楠
Original assignee: 华为技术有限公司
Priority date: 2021-06-16
Filing date: 2022-05-11
Publication date: 2022-12-22
Also published as: CN115484651A

Abstract

Disclosed in the present application is a serving cell handover method. Specifically, a network device divides each cell into a plurality of rasters, acquires flow information corresponding to each raster, determines, according to the flow information corresponding to the rasters and a plurality of cells corresponding to the rasters, recommended accessed cells corresponding to the rasters, and sends the recommended accessed cells corresponding to the rasters to wireless access apparatuses corresponding to the cells. During practical application, a user equipment sends reference signal received power of a plurality of uplink beams to a first wireless access apparatus of a first cell; the first wireless access apparatus determines a target raster of the user equipment in beam space according to the reference signal received power of the plurality of uplink beams, and determines the recommended accessed cell corresponding to the target raster; and when the recommended accessed cell is a second cell, the first wireless access apparatus sends a handover instruction to the user equipment, so as to instruct the user equipment to access the second cell. It can be seen that when the recommended accessed cell is determined, flow information of the cell is taken into consideration to avoid the load of the determined recommended accessed cell being relatively high, thereby improving the usage experience of users.

Description

A serving cell handover method, serving cell determination method and device

This application claims the priority of the Chinese patent application with the application number 202110670065.7 and the application title "A Serving Cell Handover Method, Serving Cell Determination Method and Device" filed on June 16, 2021, the entire contents of which are incorporated by reference In this application; this application claims the priority of the Chinese patent application filed on June 29, 2021 with the application number 202110729066.4 and the application name "A method for switching serving cells, a method and device for determining serving cells", the entire content of which Incorporated in this application by reference.

technical field

The present application relates to the field of communication technologies, and in particular to a method for switching a serving cell, a method and a device for determining a serving cell.

Background technique

As the scale of network construction expands and continues to mature, the number of cells and user equipment (user equipment, UE) in the network continues to increase. Usually, UEs in different locations will access different cells. For the same UE, when its location changes, it will also access different cells along with the location change. How to enable the UE to access the recommended access cell is an urgent problem to be solved in network optimization.

Contents of the invention

Embodiments of the present application provide a serving cell handover method, a serving cell determination method and an apparatus, so that when a UE accesses a network, it can access a network through a recommended access cell.

In the first aspect of the embodiments of the present application, a serving cell handover method is provided, wherein the first cell corresponds to the first wireless access device, the second cell corresponds to the second wireless access device, and the service cell corresponding to the user equipment The cell is the first cell, and the method includes: receiving, by the first wireless access apparatus, reference signal received powers of multiple uplink beams sent by the user equipment; by the first wireless access apparatus, according to the multiple The reference signal received power of each uplink beam determines the target grid of the user equipment in the beam space; the first wireless access device determines the recommended access cell corresponding to the target grid, and the recommended access cell corresponding to the target grid The access cell is determined according to the traffic information corresponding to the target grid; when the recommended access cell is the second cell, the first wireless access apparatus sends a handover instruction to the user equipment, and the The handover instruction includes an identifier of the second wireless access apparatus, and the handover instruction is used to instruct the user equipment to access the second cell.

In this implementation, the user equipment sends the reference signal received power of multiple uplink beams to the wireless access device of the current serving cell, that is, the first wireless access device of the first cell, and the first wireless access device receives multiple After receiving the reference signal power of the multiple uplink beams, determine the target grid where the user equipment is located in the beam space according to the reference signal received power of the multiple uplink beams, and then determine the corresponding recommended access cell according to the target grid. When the recommended access cell is the second cell, the first wireless access apparatus sends a handover instruction to the user equipment, so as to instruct the user equipment to access the second cell through the handover instruction. It can be seen that in the embodiment of the present application, when determining the recommended access cell, traffic information is taken into consideration, so as to avoid the phenomenon that the determined recommended access cell has a high load, thereby ensuring that the cell accessed by the user equipment is a recommended access cell, and improving User experience.

In a specific implementation manner, the first wireless access device sends a handover request to the second wireless access device, where the handover request includes the identifier of the user equipment, and the handover request is used to request the The second cell provides services for the user equipment.

In this implementation manner, the first wireless access apparatus further sends a handover request to the second wireless access apparatus, so as to instruct the second cell to provide services for the user equipment through the handover request, so as to ensure the service quality of the user equipment.

In a specific implementation manner, the first radio access apparatus determines the target grid of the user equipment in the beam space according to the reference signal received power of the plurality of uplink beams, including: the first radio access The input device obtains the distance between the user equipment and each grid according to the received power of the reference signal of the plurality of uplink beams and the center coordinate of each grid, and the center coordinate of the grid is received by the reference signal of the plurality of beams Power representation: the first wireless access apparatus determines the grid corresponding to the minimum distance as the target grid of the user equipment in the beam space.

In this implementation, when the center coordinate of the grid is represented by the reference signal received power of multiple beams, when the first wireless access apparatus receives the reference signal received power of multiple uplink beams sent by the user equipment, The distance between the user equipment and each grid can be calculated based on the received power of the reference signal, so as to determine the grid with the closest distance to the user equipment, that is, the target grid.

In a specific implementation manner, the determining the recommended access cell corresponding to the target grid by the first wireless access device includes: the first wireless access device receives a correspondence sent by a network device, and the The corresponding relationship includes the corresponding relationship between the identifier of the target grid and the identifier of the recommended access cell; the first wireless access device determines the target according to the identifier of the target grid and the corresponding relationship. The recommended access cell corresponding to the grid.

In this implementation, the cells covered by the beam space may pre-store the correspondence between the grid and the recommended access cell, and after the target grid is determined, the recommended access cell may be determined according to the above correspondence.

In a specific implementation manner, the identifier of the target grid is the center coordinates of the target grid.

In a specific implementation manner, the first radio access apparatus determines the target grid of the user equipment in the beam space according to the reference signal received power of the plurality of uplink beams, including: the first radio access The access device determines that the time for receiving the reference signal received power of the plurality of uplink beams satisfies a preset period; the first wireless access device receives the reference signals of the plurality of uplink beams within the preset period The received power determines the target grid of the user equipment in the beam space.

In this implementation, in order to reduce the overhead of the first wireless access device and avoid performing the operation of determining the target grid every time after receiving the received power of a plurality of uplink Dr. reference signals sent by the user equipment, it can be preset The processing period is to determine the grid where the user equipment is located only after receiving the reference signal received power of multiple uplink beams sent by the user equipment within a preset period.

In a specific implementation manner, the reference signal received power of the multiple uplink beams is the channel sounding reference signal received power of the multiple uplink beams.

In the second aspect of the embodiment of the present application, a method for determining a serving cell is provided, which divides each of the multiple cells covered by the beam space into multiple grids, and the beam space is based on the reference signal of multiple beams If the received power is determined, the method includes: for any grid in the beam space, the network device acquires one or more cells corresponding to the corresponding grid and traffic information corresponding to the corresponding grid, and the corresponding grid corresponds to The one or more cells are the cells where the downlink beam received by the user equipment located in the grid is located, and the multiple cells covered by the beam space include one or more cells corresponding to the corresponding grid; the network device according to the corresponding One or more cells corresponding to the grid and the traffic information corresponding to the corresponding grid determine the recommended access cell corresponding to each grid, and the recommended access cell corresponding to the grid is the service network corresponding to the user equipment located in the grid. A cell: the network device sends the recommended access cell corresponding to the grid to the wireless access device corresponding to each of the multiple cells covered by the beam space.

In this implementation manner, the network device divides each cell into multiple grids in the beam space, and obtains traffic information corresponding to each grid. When a grid corresponds to multiple cells, the network device will determine the recommended access cell corresponding to the grid according to the traffic information corresponding to the grid and the multiple cells corresponding to the grid, and The recommended access cell corresponding to the grid is sent to the wireless access device corresponding to each cell.

In a specific implementation manner, the network device determines the recommended access cell corresponding to the corresponding grid according to one or more cells corresponding to the corresponding grid and the traffic information corresponding to the corresponding grid, including: the network The device obtains the traffic corresponding to each cell according to one or more cells corresponding to the corresponding grid, the traffic information corresponding to the corresponding grid, and preset parameters, and the preset parameter is the traffic corresponding to the corresponding grid The proportion of traffic belonging to each cell in the traffic indicated by the information; the network device determines the target cell according to the traffic corresponding to each cell, and the target cell is the cell with the largest traffic; the network device minimizes the The traffic of the target cell is the target, and the value of the preset parameter is determined; the network device determines the recommended access cell corresponding to each grid according to the value of the preset parameter.

In this implementation, when determining the recommended access cell corresponding to the grid, the goal is to minimize the traffic of the cell with the largest traffic, so that the traffic of each cell is balanced, so as to ensure that the determined recommended access Incoming cell load balancing.

In a specific implementation manner, after the network device obtains one or more cells corresponding to the corresponding grid and the traffic information corresponding to the corresponding grid, the method further includes: the network device obtains the center coordinates corresponding to the corresponding grid and traffic information, the center coordinates corresponding to the corresponding grid are represented by the reference signal received power of multiple beams; for any grid, the network device obtains each grid corresponding to the grid according to the center coordinates corresponding to the grid The angular power spectrum of the cell, the angular power spectrum is used to indicate the path information between the receiving end and the transmitting end; the network device combines multiple grids according to the angular power spectrum of each cell corresponding to the grid , to obtain the merged grid; the network device obtains the center coordinates and flow information corresponding to the merged grids according to the center coordinates and flow information corresponding to the merged multiple grids; the network device will The cell corresponding to each of the merged multiple grids is determined as one or more cells corresponding to the merged grid.

In a specific implementation manner, the network device merges multiple grids according to the angular power spectrum of each cell corresponding to the grid to obtain the combined grid, including: the network device according to the The angular power spectrum of each cell corresponding to the two grids determines whether the two grids belong to the same category; the network device combines all the grids belonging to the same category to obtain the combined grid.

In a specific implementation manner, the network device determines whether the two grids belong to the same class according to the angular power spectrum of each cell corresponding to the two grids, including: the network device determining the The overlapping cells corresponding to the two grids; the network device obtains the angular power spectrum between the two grids according to the number of the overlapping cells and the angular power spectrum of each cell in the overlapping cells to the two grids Distance: when the network device determines that the distance between the two grids is less than a preset distance threshold, determine that the two grids belong to the same category.

In a specific implementation manner, the network device sends the recommended access cell corresponding to the grid to the wireless access device corresponding to each cell, including: the network device will include the recommended access cell corresponding to the grid The corresponding relationship between the identifier and the identifier of the recommended access cell corresponding to the grid is sent to the AAU corresponding to each cell.

In this implementation, after the network device determines the recommended access cell corresponding to each grid, it sends its corresponding relationship to the wireless access device of each cell in the beam space, so that it can use the above relationship to determine to provide more information for the user equipment. Well-served neighborhood.

In the third aspect of the embodiment of the present application, there is provided an apparatus for switching a serving cell, the first cell corresponds to the apparatus, the second cell corresponds to the second wireless access apparatus, and the serving cell corresponding to the user equipment is the first In a cell, the apparatus includes: a receiving unit configured to receive reference signal received powers of multiple uplink beams sent by the user equipment; a determining unit configured to determine the user according to the reference signal received powers of the multiple uplink beams The target grid of the device in the beam space; the determining unit is further configured to determine the recommended access cell corresponding to the target grid, and the recommended access cell corresponding to the target grid is based on the determined by traffic information; a sending unit, configured to send a handover instruction to the user equipment when the recommended access cell is the second cell, where the handover instruction includes an identifier of the second wireless access device, The handover instruction is used to instruct the user equipment to access the second cell.

In a specific implementation manner, the sending unit is further configured to send a handover request to the second wireless access device, where the handover request includes the identifier of the user equipment, and the handover request is used to request the The second cell provides services for the user equipment.

In a specific implementation manner, the determining unit is specifically configured to obtain the distance between the user equipment and each grid according to the reference signal received power of the multiple uplink beams and the center coordinate of each grid, The central coordinates of the grid are represented by reference signal received powers of multiple beams; the grid corresponding to the minimum distance is determined as the target grid of the user equipment in the beam space.

In a specific implementation manner, the receiving unit is further configured to receive the correspondence sent by the network device, the correspondence including the correspondence between the identifier of the target grid and the identifier of the recommended access cell relationship; the determining unit is specifically configured to determine the recommended access cell corresponding to the target grid according to the identifier of the target grid and the corresponding relationship.

In a specific implementation manner, the determining unit is specifically configured to determine that the time for receiving the reference signal received power of the multiple uplink beams satisfies a preset period; according to the The reference signal received power of the multiple uplink beams determines the target grid of the user equipment in the beam space.

In the fourth aspect of the embodiment of the present application, an apparatus for determining a serving cell is provided, which divides each of the multiple cells covered by the beam space into multiple grids, and the beam space is based on the reference signal of multiple beams If the received power is determined, the device includes: an acquisition unit, configured to acquire, for any grid in the beam space, one or more cells corresponding to the corresponding grid and traffic information corresponding to the corresponding grid, the corresponding grid The one or more cells corresponding to the grid are the cells where the downlink beam received by the user equipment located in the grid is located, and the multiple cells covered by the beam space include the one or more cells corresponding to the corresponding grid; the determining unit, It is used to determine the recommended access cell corresponding to each grid according to one or more cells corresponding to the corresponding grid and the traffic information corresponding to the corresponding grid, and the recommended access cell corresponding to the grid is the user located in the grid A serving cell corresponding to the device; a sending unit configured to send the recommended access cell corresponding to the grid to the wireless access device corresponding to each of the multiple cells covered by the beam space.

In a specific implementation manner, the determining unit is specifically configured to obtain the traffic corresponding to each cell according to one or more cells corresponding to the corresponding grid, the traffic information corresponding to the corresponding grid, and preset parameters , the preset parameter is the proportion of traffic belonging to each cell in the traffic indicated by the traffic information corresponding to the corresponding grid; the target cell is determined according to the traffic corresponding to each cell, and the target cell is the largest traffic The cell; aiming at minimizing the traffic of the target cell, determining the value of the preset parameter; determining the recommended access cell corresponding to each grid according to the value of the preset parameter.

In a specific implementation manner, the acquisition unit is further configured to acquire the center coordinates and flow information corresponding to the corresponding grid, where the center coordinates corresponding to the corresponding grid are represented by the reference signal received power of multiple beams; for For any grid, the angular power spectrum of each cell corresponding to the grid is obtained according to the central coordinates corresponding to the grid, and the angular power spectrum is used to indicate the path information between the receiving end and the transmitting end; according to the grid The angular power spectrum of each cell corresponding to the grid is combined to obtain the merged grid; according to the center coordinates and flow information corresponding to the merged multiple grids, the merged grid is obtained Corresponding center coordinates and flow information; determining the sub-districts corresponding to the merged multiple grids as one or more sub-districts corresponding to the merged grids.

In a specific implementation manner, the acquiring unit 601 is specifically configured to determine whether the two grids belong to the same category according to the angular power spectrum of each cell corresponding to the two grids; All the rasters are merged to obtain the merged raster.

In a specific implementation manner, the acquiring unit is specifically configured to determine the overlapping cells corresponding to the two grids; according to the number of the overlapping cells and each cell in the overlapping cells to the two the angular power spectrum of the grids to obtain the distance between the two grids;

When it is determined that the distance between the two grids is less than a preset distance threshold, it is determined that the two grids belong to the same classification.

In a specific implementation manner, the sending unit is specifically configured to send the corresponding relationship including the identifier corresponding to the grid and the identifier of the recommended access cell corresponding to the grid to the wireless station corresponding to each cell. access device.

In the fifth aspect of the embodiment of the present application, a communication device is provided, and the device includes: a processor and a memory; the memory is used to store instructions or computer programs; the processor is used to execute the The instruction or the computer program, so that the communication device executes the method described in the first aspect.

In the sixth aspect of the embodiment of the present application, a communication device is provided, and the device includes: a processor and a memory; the memory is used to store instructions or computer programs; the processor is used to execute the The instruction or the computer program, so that the communication device executes the method described in the second aspect.

In the seventh aspect of the embodiments of the present application, there is provided a computer-readable storage medium, including instructions, which, when run on a computer, cause the computer to execute the method described in the first or second aspect above.

Through the technical solution provided by the embodiment of the present application, the network device divides each cell into multiple grids in the beam space, and obtains traffic information corresponding to each grid. When a grid corresponds to multiple cells, the network device will determine the recommended access cell corresponding to the grid according to the traffic information corresponding to the grid and the multiple cells corresponding to the grid, and The recommended access cell corresponding to the grid is sent to the wireless access device corresponding to each cell. In actual application, the user equipment sends the reference signal received power of multiple uplink beams to the wireless access device of the current serving cell, that is, the first wireless access device of the first cell, and the first wireless access device receives multiple After receiving the reference signal power of the uplink beam, the target grid where the user equipment is located in the beam space is determined according to the reference signal received power of the multiple uplink beams, and then the corresponding recommended access cell is determined according to the target grid. When the recommended access cell is the second cell, the first wireless access apparatus sends a handover instruction to the user equipment, so as to instruct the user equipment to access the second cell through the handover instruction. It can be seen that in the embodiment of the present application, when determining the recommended access cell, traffic information is taken into consideration, so as to avoid the phenomenon that the determined recommended access cell has a high load, thereby ensuring that the cell accessed by the user equipment is a recommended access cell, and improving User experience.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in this application, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of a beam space provided by an embodiment of the present application;

FIG. 2 is a flowchart of a method for determining a serving cell provided in an embodiment of the present application;

FIG. 3 is a flow chart of a serving cell handover method provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of a system architecture provided by an embodiment of the present application;

FIG. 5 is a structural diagram of a serving cell switching device provided in an embodiment of the present application;

FIG. 6 is a structural diagram of an apparatus for determining a serving cell provided in an embodiment of the present application;

FIG. 7 is a structural diagram of a network device provided in an embodiment of the present application;

FIG. 8 is a structural diagram of another network device provided by the embodiment of the present application.

detailed description

In order to enable those skilled in the art to better understand the solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described implementation Examples are only some embodiments of the present invention, but not all embodiments.

Currently, user equipment access to a cell mainly depends on the signal strength of neighboring cells, that is, the measurement and judgment of reference signal received power (RSRP). Specifically, the signal strength threshold of the cell and the signal strength threshold of the neighboring cell are pre-configured in the active antenna unit (Active Antenna Unit, AAU) corresponding to each cell. The serving cell sends a measurement signal to the user equipment, for example, the user equipment determines whether the strength of the measurement signal is less than the signal strength threshold of the serving cell, and when the strength of the measurement signal is less than the signal strength threshold of the serving cell, the user equipment sends a measurement report to the serving cell . The serving cell determines through the measurement report that the strength of the measurement signal is less than the signal strength threshold of the serving cell, and sends a notification message to the user equipment. The notification message is used to instruct the user equipment to measure the signal strength of the neighboring cell, and the notification message includes the signal strength threshold of the neighboring cell. When the user equipment determines that the strength of the measurement signal of the neighboring cell is greater than the signal strength threshold of the neighboring cell, the user equipment sends a measurement report to the serving cell. The serving cell determines through the measurement report that the strength of the measurement signal of the neighboring cell is greater than the signal strength threshold of the neighboring cell, and sends an indication message to the user equipment, so as to instruct the user equipment to access the neighboring cell through the indication message. However, in some application scenarios, if the access cell is selected only based on the strength of the signal strength, the load of the selected access cell will be high, and high-quality services cannot be provided for the user equipment.

Based on this, an embodiment of the present application provides a user equipment access method, which divides each cell into multiple grids in the beam space, and determines the recommended access corresponding to each grid based on the traffic information of each grid district. At the same time, the recommended access cell corresponding to each grid is configured in the wireless access device corresponding to each cell. As the radio access device of the serving cell corresponding to the user equipment, after receiving the reference signal received power of multiple uplink beams sent by the user equipment, determine the position of the user equipment in the beam space according to the reference signal received power of the multiple uplink beams The target grid, and then determine the recommended access cell corresponding to the target grid, and determine the recommended access cell as the recommended access cell for the user equipment. If the recommended access cell is not the current serving cell, the radio access device of the serving cell sends a switching instruction to the user equipment to instruct the user equipment to access the recommended access cell.

In order to facilitate understanding of the specific implementation of the embodiments of the present application, the technical concepts involved in the embodiments of the present application will be explained below.

Massive multiple input multiple output (MIMO): The antennas of traditional MIMO are 2 antennas, 4 antennas or 8 antennas, while the number of channels of Massive MIMO reaches 64/128/256. For traditional MIMO, taking 8 antennas as an example, the actual signal moves in the horizontal direction in the coverage area and does not move in the vertical direction. The Massive MIMO signal is introduced into the airspace of the vertical dimension on the basis of the horizontal dimension space for utilization. In addition, Massive MIMO also has the advantages of providing rich spatial degrees of freedom, providing more possible arrival paths, and improving signal reliability. For wireless networks based on Massive MIMO technology (for example, 4.5G and 5G, etc.), user equipment can use multiple beams (such as narrow beams) in the beam space to communicate during the interaction with the base station.

Wherein, the beam space may be defined based on multiple static beams. FIG. 1 is a schematic diagram of a possible beam space. Static beams refer to beams formed using predefined weights during beamforming. For example, fixed beams are formed under a cell, where the number, width, and direction of the beams are all determined. Among them, the static beam may include a beam carrying a sounding reference signal (SRS) and a beam carrying a synchronization signal block (Synchronization signal and PBCH block, SSB), and its sending direction is determined by a physical radio frequency (radio frequency, RF) parameter . When the physical RF parameters are determined, the beam space may be defined based on multiple static beams carrying SRS or static beams carrying SSB.

The n-dimensional beam space involved in the embodiment of the present application is defined based on n static beams. For example, the n-dimensional beam space is defined based on n beams carrying SRS, at this time, n beams are the number of beams received by the beam antenna, or, the n-dimensional beam space is defined based on n beams carrying SSB, at this time The n beams are the number of beams received by the beam antenna. Wherein, the n-dimensional beams are multiple beams mentioned in the embodiment of the present application.

The information of multi-beams can be determined through measurement report (measurement report, MR). Among them, MR can record the time when MR is generated, the level measurement value and flow measurement value of multiple beams, etc. The level measurement value of a beam may be the RSRP obtained by the base station measuring the SRS sent by the user equipment using the beam, or the level measurement value of a beam may be the RSRP obtained by the user equipment measuring the SSB sent by the base station using the beam. Wherein, for the latter case, the user equipment needs to report the measured level measurement value of the beam to the base station.

MR can include CELLID, TIME, RSRP1-RSRPn, ULTHP, DLTHP and other information. Wherein, CELLID refers to a cell ID. Wherein, the cell ID is the ID of the serving cell corresponding to the user equipment, and the MR is the MR for the user equipment. TIME refers to the time when the MR was generated. RSRP1 to RSRPn refer to level measurement values of n beams, or may also be referred to as n-dimensional beam level measurement values. RSRP1 to RSRPn refer to the n RSRPs obtained by the base station measuring the SRSs transmitted by the user equipment using n beams respectively, or the n RSRPs obtained by the user equipment measuring the SSBs transmitted by the base station using n beams respectively. Wherein, n is the number of beams included in the beam space, for example, the value of n may be 32, or 64, etc. It can be understood that, taking RSRP1 as an example, RSRP1 is the average or cumulative value of the RSRP of the first beam measured within the time period determined by the generation time of the current MR and the generation time of the previous MR.

In addition, it should be noted that the MR may include level measurement values of n beams, or level measurement values of p beams, where p<n, and both p and n are positive integers. Wherein, the level measurement values of the p beams refer to p effective level measurement values. It can be understood that the user equipment or the base station may not be able to measure the level measurement values of all n beams, for example, the user equipment can only measure the level measurement values of p beams in the n beams, at this time, the user equipment may only Report the level measurement values of p beams. For the convenience of subsequent use, the level measurement values of p beams may be represented as level measurement values of n beams, for example, the level measurement values of other n-p beams except p beams are set to 0.

ULTHP (uplink throughput) represents the measured value of uplink traffic, and DLTHP (downlink throughput) represents the measured value of downlink traffic. Among them, only ULTHP or DLTHP can be included in MR. Among them, ULTHP is the sum of the accumulated uplink packet size in the time period determined by the generation time of the current MR and the generation time of the previous MR, and DLTHP is the size determined by the generation time of the current MR and the generation time of the previous MR The sum of the size of downlink packets accumulated in the time period.

Wireless channel: In wireless communication, the path between the sending end (antenna, which can be one antenna or one or more antenna arrays) and the receiving end (such as user equipment) can include multiple channels. A wireless channel may also be called a path. The sending end may be an antenna (for example, one antenna, or one or more antenna arrays), and the receiving end may be a user equipment. The sending end may also be a user equipment, and the receiving end may also be an antenna.

Path strength: the power component on the path when the wireless signal of unit power propagates to the receiving end. The path strength characterizes the ratio of the remaining power of the signal on the path after spatial propagation.

Target path strength: The target path strength is a matrix, and the dimension of the matrix is the same as the number of horizontal and vertical discretization angles of each beam of the angular power spectrum cell. The elements in the matrix represent the path strengths of the horizontal and vertical paths after angle discretization.

Angular power spectrum: The angular power spectrum is a description of the wireless channel from the antenna to the grid, including information such as the number of paths, path angles, and path strengths.

Angular power spectrum cell: the cell where the downlink beam received by the user equipment located in the grid is located. For example, the user equipment can receive the downlink beams sent by the cell 1 and the cell 2 respectively, and the cell 1 and the cell 2 are both angular power spectrum cells.

Serving cell: the cell with the highest reference signal received power detected by the user equipment.

Sounding reference signal SRS: is an uplink pilot signal sent by the user equipment to the radio access network equipment, and is used to obtain the channel quality of each wireless channel in each frequency band. The received power of the SRS signal is called SRS-RSRP.

Wherein, the RSRP of the uplink beam includes demodulation reference signal (demodulation reference signal, DMRS) RSRP, SRS-RSRP and so on. In the embodiment of the present application, the SRS-RSRP is taken as an example for description. The RSRP of the downlink beam includes RSRP, SSB-RSRP, etc. based on channel state information reference signal (channel state information reference signal, CSI-RS).

Grid: Divide each cell into multiple virtual grids in the beam space, and one beam space can correspond to (or cover) one or more cells.

Among them, the user equipment is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites, etc.). The user equipment can be UE, mobile phone, tablet computer (Pad), computer with wireless transceiver function, virtual reality (virtual reality, VR) user equipment, augmented reality (augmented reality, AR) user equipment, industrial control ( Wireless terminals in industrial control, vehicle user equipment, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security Safety), wireless terminals in smart city, wireless terminals in smart home, wearable user equipment, etc. User equipment may be fixed or mobile.

Wherein, the wireless access device corresponding to the cell is an access network device with a transceiver function. For example, it could be AAU. For ease of understanding, the following description will be made by taking the wireless access device as an AAU as an example.

For ease of understanding, the method for determining a serving cell and the method for switching a serving cell provided in the embodiments of the present application will be described below with reference to the accompanying drawings.

Referring to FIG. 2, this figure is a flowchart of a method for determining a serving cell provided in an embodiment of the present application. As shown in FIG. 2, the method may include:

S201: The network device acquires one or more cells corresponding to a corresponding grid and traffic information corresponding to the corresponding grid.

In this embodiment, each of the multiple cells covered by the beam space is divided into multiple grids in advance. Since one base station can cover multiple cells and there are overlapping areas between adjacent cells, the cell is divided into multiple grids. When there are two grids, there may be overlapping grids between adjacent cells, so there are cases where some grids correspond to multiple cells. Wherein, the one or more cells corresponding to the corresponding grid refers to the cells where the downlink beams that can be received by the user equipment located in the grid are located. The traffic information corresponding to the corresponding grid includes an uplink traffic measurement value and/or a downlink traffic measurement value.

Among them, the network device may use but not limited to the following methods to obtain the traffic information corresponding to the corresponding grid:

1) The network device acquires a first data set, where the first data set includes a plurality of data collected in a first time period, and each data includes a traffic measurement value and level measurement values of n beams.

Wherein, the first data set may include MRs collected during the first time period. For example, the first data set may include MRs collected within one week or two weeks, or the first data set may include MRs collected within one day, or the first data set may include MRs collected within one hour. The network device may divide the collected data into data sets corresponding to multiple time periods according to the generation time in the MR to obtain multiple data sets, and the first data set may be one of the multiple data sets. In addition, the first data set is MR collected for a cell within the first time period, and the cell corresponding to the first data set is the same cell as the cells corresponding to the multiple grids in the n-dimensional beam space.

For example, the first data set includes K data, and the first data set may be shown as ThpMat ₁ , and the level matrix L _{1 may be extracted through ThpMat 1} _.

Wherein, each row in ThpMat ₁ may correspond to the generation time, flow measurement value (uplink flow measurement value and/or downlink flow measurement value) and level measurement value of n beams included in one MR, and K is the first data set includes the number of data. Each row _of the level matrix L1 is the level measurement value of n beams. Wherein, time ₁ , 1 ... time _{K, 1} all belong to the first time period.

2) The network device determines the second data set associated with the first grid in the first data set according to the level measurement values of n beams of each data and the central coordinates of the first grid, and the central coordinates of the first grid It is represented by the level value of n beams.

Wherein, the first grid can be any one of the multiple grids in the n-dimensional beam space, or the first grid can be a specific grid among the multiple grids in the n-dimensional beam space . Among them, the network device can determine multiple grids in the n-dimensional beam space and the center coordinates corresponding to each grid in the following manner:

Step 1: The network device acquires a training data set, and the training data set includes M samples.

Wherein, the training data set may include MRs collected within a preset time period, for example, the training data set may include MRs collected within one week or two weeks. It should be noted that the training data set is MR collected for a cell within a preset time period. Therefore, the finally determined multiple grids in the n-dimensional beam space are multiple grids corresponding to the cell.

In one case, the training data set includes M samples, each sample includes level measurements of n beams. For example, the network device can determine the training data set shown in the level measurement value matrix L according to the M MRs. If an MR includes level measurement values of n beams (that is, RSRPs of n beams), the level measurement values of n beams are directly used as a row in the level measurement value matrix L. If an MR includes the level measurement values of p beams, it is necessary to write the level measurement values of p beams as the level measurement values of n beams. Specifically, the other n-p beams except p beams correspond to The measured level values of the beams are set to 0, and then the obtained measured level values of the n beams are used as a row in the level measured value matrix L.

Wherein, each row in the level measurement value matrix L may correspond to the level measurement values of n beams in one MR, and the level measurement value matrix L indicates M groups of level measurement values.

In another case, the training data set includes M samples, and each sample includes flow measurement values and level measurement values of n beams, wherein the flow measurement values may include uplink flow measurement values and/or downlink flow measurement values . For example, the network device can determine the training data set shown in the traffic matrix ThpMat according to the M MRs.

Wherein, each row in the flow matrix ThpMat may correspond to a flow measurement value in one MR and level measurement values of n beams. If the MR includes only dlthp but not ulthp, then ulthp can be set to 0. Similarly, if MR only includes ulthp but not dlthp, dlthp can be set to 0. The traffic matrix ThpMat may also include a time value time, or may not include a time value time, which is not limited in this embodiment of the present application. Wherein, the level measurement value matrix L can also be extracted through the flow matrix ThpMat.

Step 2: The network device obtains a distance set corresponding to the training data set according to the training data set, and the distance set includes distances between level measurement values of n beams of any two samples in the M samples.

For example, the distance matrix R is calculated by using the level measurement value matrix L or the flow matrix ThpMat as input (the distance matrix R is M×M dimension), where,

R _ij = dist(L _{i, ·} , L _{j, ·} ),

where R _ij represents the distance between the level measurements of the n beams contained in the i-th sample in the level measurement matrix L or the flow matrix ThpMat and the level measurements of the n beams contained in the j-th sample, or It can also be described as the distance between the beam space position corresponding to the i-th sample and the beam space position corresponding to the j-th sample. The distance dist may be defined as the Euclidean distance or other distances in the beam space, which is not limited in this embodiment of the present application. Wherein, the distance matrix R includes some repeated elements, for example, R _ij =R _ji , and also includes some distances determined by the same sample, for example, R _ii =0. Wherein, the distance set corresponding to the training data set includes M(M-1)/2 distances in total, and the above-mentioned distance matrix R is only a form of representation of the distance set corresponding to the training data set, and the distance set corresponding to the training data set can also be Other expression forms are adopted, which are not limited in this embodiment of the present application.

Among them, L _i, refers to the level measurement value of the n beams in the i-th row in the level measurement value matrix L, that is, {rsrp _{i, 1} , rsrp _{i, 2} , ..., rsrp _{i, n} }, L _{j, ·} refers to the level measurement value of the n beams in the j-th row in the level measurement value matrix L, that is, {rsrp _{j, 1} , rsrp _{j, 2} , ..., rsrp _{j, n} }. Alternatively, L _i, refers to the level measurements of the n beams in the i-th row in the traffic matrix ThpMat, namely {rsrp _i,1 , rsrp _i,2 ,...,rsrp _i,n }, L _j, refers to the level measurement value of the n beams in the jth row of the traffic matrix ThpMat, namely {rsrp _{j, 1} , rsrp _{j, 2} , ..., rsrp _{j, n} }.

Step 3: The network device determines the grid index corresponding to each sample in the M samples according to the distance set.

In some embodiments, the grid index corresponding to each sample is determined by using a preset clustering algorithm according to the distance set corresponding to the training data set. Wherein, the preset clustering algorithm may refer to a distance clustering method (such as Kmeans, etc.), which is not limited in this embodiment of the present application.

Specifically, the grid index corresponding to each sample can be determined by using a preset distance clustering algorithm according to the above distance matrix R. Specifically, it can be represented by the grid index matrix Label. The grid index matrix Label can be a 1×M dimensional matrix, labeli refers to the grid index corresponding to the i-th sample, and the value of label _i is an integer (1≤label _i ≤m′), indicating that the i-th sample corresponds to The grid indicated by label _i , where m'<M, the value of m' can be determined based on empirical values, or determined according to the size of the actual required grid range. It can be understood that the smaller the value of m', the larger the range of each grid, and the larger the value of m', the smaller the range of each grid.

Among them, the samples with the same grid index belong to the same grid, for example, the 2nd sample, the 5th sample, and the 10th sample respectively have the same values of label ₂ , label ₅ , and label ₁₀ , assuming that label ₂ =label ₅ =label ₁₀ =3, then the second sample, the fifth sample, and the tenth sample belong to the grid whose grid index is 3 (that is, the third grid).

It can be understood that after step 3, since 1≤label _i ≤m', the grid index matrix Label indicates the distribution of M samples in the m' grids. It should be noted that the m' grids may be the finally determined multiple grids, that is, the number of the multiple grids may be m', or the m' grids may not be the final determined multiple grids. When , the m' grids are m' candidate grids, which need to be further screened, and the number of finally determined multiple grids may be less than m'. These two situations will be introduced respectively below (for details, please refer to Example 1 and Example 2 below), and details will not be repeated here.

Step 4: The network device determines the center coordinates and radius of each grid.

The following describes how to determine the multiple grids included in the n-dimensional beam space, as well as the center coordinates and radius of each grid, in combination with Example 1 and Example 2 according to the specific content included in the training data set.

Example 1: If the training data set includes M samples, each sample includes level measurement values of n beams, excluding flow measurement values. After step 3, the m' grids determined by using the preset distance clustering algorithm according to the distance matrix R are the multiple grids included in the finally determined n-dimensional beam space.

The central coordinates of each grid may be determined according to level measurement values of n beams included in each sample in the samples corresponding to the grid. In one example, taking the grid corresponding to grid index i as an example, a level measurement of n beams is calculated according to the level measurement values of n beams included in each sample in the sample corresponding to grid index i The average value of the value, the average value of the level measurement values of the n beams is recorded as the center coordinate of the i-th grid.

The radius of each grid can be a preset value, for example, the preset value can be determined according to empirical values. Alternatively, the radius of each grid may be determined according to the level measurement values of the n beams included in each sample corresponding to the grid and the center coordinates of the grid. In an example, the radius of the i-th grid is determined according to the level measurement values of n beams included in each sample of the sample corresponding to the grid index i and the center coordinates of the i-th grid. In another example, the radius of the i-th grid is determined from the maximum distance in the set of radii, which is the level measurement of the n beams included in each of the samples corresponding to the grid index i The distance between the value and the center coordinates of the i-th grid is determined. For example, the radius of the i-th grid is the maximum distance in the radius set, or the radius of the i-th grid is the sum of the maximum distance in the radius set and the preset distance, or the radius of the i-th grid is The difference between the largest distance in the set of radii and the preset distance.

Using the multiple grids included in the n-dimensional beam space determined by the method shown in Example 1 above, and the center coordinates and radius of each grid, the solution is simple and easy to implement. Among them, since the center coordinate of each grid is the average value of the level measurement values of multiple samples, the spatial position of the flow rate is represented by the center coordinate of the grid, which can reduce the impact of noise and measurement errors on the space. Location is more statistically significant.

Example 2: If the training data set includes M samples, and each sample includes the flow measurement value and the level measurement value of n beams, after step 3, m′ determined by using the preset distance clustering algorithm according to the distance matrix R The grids are not the multiple grids included in the finally determined n-dimensional beam space. The m' grids determined after step 3 are the m' candidate grids, and m ' Candidate grids are screened to obtain multiple grids included in the finally determined n-dimensional beam space.

Wherein, the flow measurement value in each sample includes an uplink flow measurement value and/or a downlink flow measurement value. The uplink flow statistical value of the i-th candidate grid is the sum of the uplink flow values of the samples that include uplink flow measurement values in the samples corresponding to the i-th candidate grid. The statistical value of the downstream traffic of the i-th candidate grid is the sum of the downstream traffic values of the samples that include the measured value of the downstream traffic in the samples corresponding to the i-th candidate grid. Alternatively, the uplink traffic statistic value of the i-th candidate grid is the average uplink traffic value corresponding to the sample corresponding to the i-th candidate grid. The downlink traffic statistical value of the i-th candidate grid is the average downlink traffic value corresponding to the sample corresponding to the i-th candidate grid.

For example, the fourth candidate grid includes 5 samples, where sample 1, sample 3, and sample 4 include measured values of downlink traffic, sample 2 includes measured values of uplink traffic, and sample 5 includes measured values of uplink traffic and downlink traffic, Then the statistical value of the uplink traffic of the fourth candidate grid is the sum of the measured value of uplink traffic included in sample 2 and the measured value of uplink traffic included in sample 5, and the statistical value of the downlink traffic of the fourth candidate grid is the downlink traffic included in sample 1 The sum of the flow measurement value, the downstream flow measurement value included in sample 3, the downstream flow measurement value included in sample 4, and the downstream flow measurement value included in sample 5. Alternatively, the uplink traffic statistics value of the fourth candidate grid is divided by the sum of the uplink traffic measurement value included in sample 2 and the uplink traffic measurement value included in sample 5, and the downlink traffic statistic value of the fourth candidate grid is sample The sum of the downstream traffic measurement value included in 1, the downstream traffic measurement value included in sample 3, the downstream traffic measurement value included in sample 4, and the downstream traffic measurement value included in sample 5 is divided by 4.

Exemplarily, the flow measurement values in the M samples are summarized according to the grid index matrix Label, and the flow statistics corresponding to the m' candidate grids are obtained. Exemplarily, the flow statistics of the m' candidate grids are respectively The value can be represented by the following uplink traffic statistic value ULTHP and/or downlink traffic statistic value DLTHP.

Among them, ulthp _i and dlthp _i respectively represent the statistical value of the upstream traffic of the ith candidate grid and the statistical value of the downstream traffic of the ith candidate grid.

The uplink traffic statistic value ULTHP includes m′ uplink traffic statistic values, that is, the uplink traffic statistic values corresponding to m′ candidate grids, and the downlink traffic statistic value DLTHP includes m′ downlink traffic statistic values, that is, m′ candidate grids corresponding uplink traffic statistics.

Specifically, the m' candidate grids can be screened in the following manner, but not limited to, to obtain multiple grids included in the finally determined n-dimensional beam space:

Method 1: If the uplink traffic statistics of the i-th candidate grid meet the preset uplink traffic threshold, and/or the downlink traffic statistics of the i-th candidate grid meet the preset downlink traffic threshold, then the i-th candidate grid grid as the final grid.

Wherein, the preset uplink traffic threshold and the preset downlink traffic threshold may be determined according to empirical values, or determined according to actual screening needs. For example, when it is necessary to filter out candidate grids with a larger statistical value of uplink traffic, the preset uplink traffic threshold may be increased.

Therefore, judgment is made on the uplink traffic statistics and/or downlink traffic statistics corresponding to the m' candidate grids and the corresponding thresholds, and multiple grids included in the final n-dimensional beam space are determined.

Method 2: According to the descending order of the m' uplink traffic statistics, k1 uplink traffic statistics are selected from the m' uplink traffic statistics, and the m' downlink traffic statistics are ordered from large to small Selecting k2 downlink traffic statistics values from the m′ downlink traffic statistics values. The ratio of the sum of k1 uplink traffic statistics to the total uplink traffic statistics is greater than or equal to the first threshold, the ratio of the sum of k2 downlink traffic statistics to the total downlink traffic statistics is greater than or equal to the second threshold, k1 and k2 are positive integers , the statistical value of the total upstream traffic refers to the sum of the upstream traffic values of the samples including the measured value of the upstream traffic in the M samples, and the statistical value of the total downstream traffic refers to the downstream traffic value of the samples including the measured value of the downstream traffic in the M samples In sum, the first threshold may be the same as or different from the second threshold, for example, first threshold=second threshold=0.8. The i-th uplink traffic statistic value among the m′ uplink traffic statistic values is the sum of the uplink traffic values of the samples including the uplink flow measurement value in the sample corresponding to the i-th candidate grid. The i th downlink traffic statistic value among the m′ downlink traffic statistic values is the sum of the downlink traffic values of the samples including the downlink traffic measurement values in the sample corresponding to the i th candidate grid.

In some embodiments, the plurality of grids is the intersection of candidate grids corresponding to k1 uplink traffic statistics values and k2 candidate grids corresponding to downlink traffic statistics values respectively. For example, if the k1 upstream traffic statistics include the upstream traffic statistics of the i-th candidate grid, and the k2 downlink traffic statistics include the i-th candidate grid’s downstream traffic statistics, then the i-th candidate grid as the finalized raster. For another example, if the k1 upstream traffic statistics include the upstream traffic statistics of the i-th candidate grid, and the k2 downlink traffic statistics do not include the i-th candidate grid’s downstream traffic statistics, then the i-th candidate grid Not a finalized raster.

In some embodiments, the plurality of grids is a union set of candidate grids corresponding to k1 uplink traffic statistics values and k2 candidate grids corresponding to downlink traffic statistics values respectively. For example, if the k1 upstream traffic statistics include the upstream traffic statistics of the i-th candidate grid, or the k2 downlink traffic statistics include the i-th candidate grid’s downstream traffic statistics, then the i-th candidate grid as the finalized raster. For another example, if the k1 upstream traffic statistics do not include the upstream traffic statistics of the i-th candidate grid, and the k2 downlink traffic statistics do not include the i-th candidate grid’s downstream traffic statistics, then the i-th candidate grid raster is not the finalized raster.

It should be noted that after the determination of the multiple grids in the n-dimensional beam space is completed, the determined multiple grids may also be updated every preset time period, that is, step 1 to step 4 are performed periodically. Among them, the multiple grids in the n-dimensional beam space are determined for the first time according to the collected MR, which can also be called the grid initialization process. It is not the first time to determine multiple grids in the n-dimensional beam space according to the collected MR, which can also be called the grid update process.

Specifically, the network device may use, but not limited to, the following methods to determine the second data set associated with the first grid in the first data set:

Method 1: The network device determines that the distance between the level measurement values of n beams included in any data in the first data set and the center coordinates of the first grid is less than or equal to the radius of the first grid, then the data is the second The data in the dataset.

In one case, assuming that the n-dimensional beam space includes m grids, and the first data set includes the first data, the network device can sequentially calculate the center coordinate of a grid and the first The data includes the distance of the level measurements of the n beams. When the distance between the level measurement values of the n beams included in the first data and the central coordinate of the first grid is less than or equal to the radius of the i-th grid, it is determined that the first data is associated with the first grid, and at this time The distances between the center coordinates of other grids before the first grid and the level measurement values of the n beams included in the first data are greater than the corresponding radius. For example, assuming that the n-dimensional beam space includes 10 grids, the distance between the center coordinates of a grid and the level measurement values of the n beams included in the first data can be calculated sequentially according to the order of the grid indexes of the 10 grids . When the distance between the level measurement values of the n beams included in the first data and the center coordinates of the first grid is greater than the radius of the first grid, it is determined that the first data is not associated with the first grid, and Continue to calculate the distance between the level measurement values of the n beams included in the first data and the center coordinate of the second grid. When the distance between the level measurement values of the n beams included in the first data and the center coordinates of the second grid is greater than the radius of the second grid, it is determined that the first data is not associated with the second grid, and Continue to calculate the distance between the level measurement values of the n beams included in the first data and the center coordinate of the third grid. When the distance between the level measurement values of the n beams included in the first data and the center coordinates of the third grid is less than or equal to the radius of the third grid, it is determined that the first data is associated with the third grid, And stop continuing to calculate the distance between the level measurement values of the n beams included in the first data and the center coordinate of the fourth grid.

In another case, assuming that the n-dimensional beam space includes m grids, the first data set includes the first data, and the level measurement values of the n beams included in the first data are related to N grids in the m grids The distances determined by the center coordinates of the are smaller than the corresponding radius, 2≤N<n, and N is a positive integer, then the network device can select any one of the N grids as the grid associated with the first data. For example, the distance between the level measurement values of the n beams included in the first data and the center coordinate of the first grid (denoted as distance 1) is smaller than the radius of the first grid, the n beams included in the first data The distance between the level measurement value and the center coordinate of the fifth grid (denoted as distance 5) is smaller than the radius of the fifth grid, and the level measurement values of the n beams included in the first data are different from those of the eleventh grid The distance between the center coordinates (denoted as distance 11) is less than the radius of the 11th grid, where any one of the 1st grid, the 5th grid and the 11th grid is selected as the grid with the first data The associated raster.

Method 2: The network device determines that the distance between the level measurement values of n beams included in any one of the data sets in the first data set and the center coordinate of the first grid is smaller than the distance between the level measurement values of the n beams and the grid coordinates in multiple grids. If the distance between the center coordinates of other grids other than the first grid, then the data is the data in the second data set.

For example, assuming that the n-dimensional beam space includes m grids, the first data set includes the first data, and the network device calculates the level measurement value of the n beams included in the first data and the center of each grid in the m grids Coordinate distances, m distances are obtained, and the grid corresponding to the smallest distance among the m distances is used as the grid associated with the first data. For example, if the grid corresponding to the smallest distance among the m distances is the i-th grid, then the i-th grid is used as the grid associated with the first data.

Method 3: The network device determines the third distance set, the third distance set includes the center coordinates of any one of the grid coordinates corresponding to the grids of the plurality of grids and the levels of the n beams included in the first data The distance of the measured value, the first data is the data in the first data set, the fourth distance set is determined according to the radius corresponding to each grid of the plurality of grids and the third distance set, and the minimum distance in the fourth distance set In the case of the distances between the first grid and the level measurement values of the n beams included in the first data, it is determined that the second data set includes the first data. Wherein, any distance in the fourth distance set is smaller than the radius of the grid corresponding to the distance.

For example, assuming that the n-dimensional beam space includes m grids, the distances between the level measurement values of the n beams included in the first data and the central coordinates of N grids in the m grids are all smaller than the corresponding radius, 2≤N<n, and N is a positive integer, the grid corresponding to the minimum distance is selected as the grid associated with the first data. For example, the distance between the level measurement values of the n beams included in the first data and the center coordinate of the first grid (denoted as distance 1) is smaller than the radius of the first grid, the n beams included in the first data The distance between the level measurement value and the center coordinate of the fifth grid (denoted as distance 5) is smaller than the radius of the fifth grid, and the level measurement values of the n beams included in the first data are different from those of the eleventh grid The distance of the center coordinates (denoted as distance 11) is less than the radius of the eleventh grid, among which, among distance 1, distance 5 and distance 11, distance 11 is the smallest, then the eleventh grid is the grid associated with the first data grid.

3) The network device determines the traffic statistics result corresponding to the first grid within the first time period according to the traffic measurement value included in each data in the second data set.

Since the traffic measurement value in each data includes the uplink traffic measurement value and/or the downlink traffic measurement value, the traffic statistics result includes the uplink traffic statistics result and/or the downlink traffic statistics result. The statistical result of the uplink traffic is determined according to the data including the measured value of the uplink traffic in the second data set, and the statistical result of the downlink traffic is determined according to the data including the measured value of the downlink traffic in the second data set. For example, the network device may sum up the uplink traffic measurement values included in the second data set as the uplink traffic statistics result corresponding to the first grid within the first time period. The network device may sum up the downlink traffic measurement values included in the second data set as the downlink traffic statistics result corresponding to the first grid within the first time period.

It can be understood that after the network device determines the multiple cells corresponding to each grid and the traffic information corresponding to the grid, it can also merge the grids according to the angular power spectrum of each grid in each corresponding cell . Wherein, the angular power spectrum is wireless channel multipath information determined by the network. The angular power spectrum includes path angles and path strengths of the propagation paths from the antennas in the angular power spectrum cell to the grid. The antenna in the angular power spectrum cell is an antenna for sending downlink beams, and the antenna may be an antenna array. Specifically, grid merging can be achieved in the following manner.

1) The network device determines whether the two grids belong to the same category according to the angular power spectrum of each cell corresponding to the two grids.

Wherein, the network device may determine the overlapping cells corresponding to the two grids, and obtain the distance between the two grids according to the number of the overlapping cells and the angular power spectrum of each cell in the overlapping cells to the two grids. When it is determined that the distance between the two grids is less than the preset distance threshold, it is determined that the two grids belong to the same category. Wherein, the preset distance threshold may be configured according to actual application conditions, which is not limited in this embodiment. Define the distance D between any two grids as shown in formula (1).

Among them, m and n represent the grid IDs of two different grids respectively, α is a parameter in the distance measure (the value is a positive value), and k represents the angular power spectrum cell ID. S represents the number of overlapping cells in the angular power spectrum, where the number of overlapping cells refers to the number of times that the identity of the serving cell in the angular power spectrum is different and the cell identity of at least one angular power spectrum is the same. W represents the Wasserstein distance, and PAS _k,m represents the angular power spectrum from cell k to grid m. Wherein, the distance between any two grids may also be the Euclidean distance or other distances in beam space or geographical space, which is not limited in this embodiment of the present application.

Wherein, the last two grids may be any two grids among the plurality of grids, or may be specific two grids. For example, the two grids refer to grids with different serving cell IDs in the angular power spectrum and the same cell ID in at least one angular power spectrum. Wherein, the network device determines grids that may need to be merged according to the serving cell ID and the cell ID of the angular power spectrum. In this embodiment, comparison is made for every two grids. If the serving cell IDs of two grids are different and the cell IDs of at least one angular power spectrum are the same, the two grids may need to be merged. For example, the angular power spectrum shown in Table 1 includes a grid with a grid ID of 134 and a grid with a grid ID of 23. The serving cell IDs corresponding to these two grids are different, and the two grid IDs correspond to The cell ID of the angular power spectrum is 3924674. The grid with grid ID 134 and the grid with grid ID 23 may need to be merged. After the grids to be merged are determined, for any two grids in the grids to be merged, the distance between the two grids is calculated using formula (1).

Table 1 Angular power spectrum output table

2) The network device merges all the grids belonging to the same category to obtain the merged grid.

In this embodiment, after the grids are merged, it is necessary to calculate the center coordinates and flow information of the merged grids, and the merged grid center coordinates and flow information are determined by the corresponding center coordinates and flow information Sure. For example, the merged grid center coordinates can be the mean value of all grid center coordinates merged into the current grid, and the flow information of the merged grid is the flow statistics result of all grids merged into the current grid mean. After the grids are merged, there may be multiple cells in the new grid, so it is necessary to select an optimal serving cell for the grid.

S202: The network device determines a recommended access cell corresponding to each grid according to one or more cells corresponding to the corresponding grid and traffic information corresponding to the corresponding grid.

After obtaining one or more cells corresponding to the corresponding grid and the traffic information corresponding to the corresponding grid, the network device will determine the corresponding The recommended access cell is the serving cell corresponding to the user equipment located in the grid. Wherein, the recommended access cell may refer to a cell that can provide services for the user equipment located in the grid when the traffic of the multiple cells corresponding to the grid is balanced.

Wherein, the network device can determine the recommended access cell corresponding to each grid in the following manner. Specifically, the network device obtains each The traffic corresponding to each cell; the network device determines the target cell according to the traffic corresponding to each cell, and the target cell is the cell with the largest traffic; the network device determines the value of the preset parameter with the goal of minimizing the traffic of the target cell; the network device The recommended access cell corresponding to each grid is determined according to the value of the preset parameter. Wherein, the preset parameter is the proportion of the traffic belonging to each cell in the traffic indicated by the traffic information corresponding to the corresponding grid, for details, please refer to the formula (2):

Wherein, Thp _i is the traffic on grid i, and the set of cells detected on grid i is J _i , i=1, 2, . . . , m. The preset parameter y _{i, j} is the proportion of traffic belonging to cell j in the traffic on grid i, y _{i, j} ∈ {0, 1}. When determining the value of y _i,j , heuristic algorithms such as Branch and Cut algorithm, Branch and Bound algorithm, and genetic algorithm can be used to solve the problem. If y _i,j =1, it means that the recommended access cell on grid i is j. Σ _i y _{i, j} Thp _i represents the traffic corresponding to cell j,

Represents the cell with the largest traffic, that is, the target cell, and the whole formula means reducing the traffic of the target cell, so that the traffic of all cells is balanced.

S203: The network device sends the recommended access cell corresponding to the grid to the wireless access device corresponding to each cell.

After determining the recommended access cell corresponding to each grid, the network device sends the recommended access cell corresponding to the grid to the wireless access device corresponding to each cell. Specifically, the corresponding relationship including the identifier of the grid and the identifier of the recommended access cell corresponding to the grid is sent to the wireless access device of each cell. Wherein, the identifier of the grid may be the center coordinate of the grid, and the center coordinate is represented by the reference signal received power of multiple beams. The specific manifestations are as follows:

………

in,

Indicates the coordinates of the i-th grid center point, and CellID _i is the ID of the recommended access cell at the i-th grid center point.

In an example, after the network device determines the recommended access cell corresponding to each grid, there may be different grids corresponding to the same recommended access cell. In this case, the grids can be merged twice , merge multiple grids with the same recommended access cell, and then update the center coordinates of the merged grids (for example, the mean value of the center coordinates of the merged multiple grids), and the center coordinates of the merged grids and The recommended access cell is sent to the wireless access device of each cell.

In an example, considering the situation that the service flow is constantly changing, the network device periodically updates the recommended access cell corresponding to each grid, and sends the updated corresponding relationship to the wireless access device of each cell.

It can be seen that in the embodiment of the present application, when the network device determines the recommended access cell corresponding to each grid, it is determined based on the traffic information of the cell, so as to avoid the high load of the determined recommended access cell, so that the user When the device is connected to the recommended access cell, it can obtain better service.

After the recommended access cell corresponding to each grid is determined through the embodiment described in FIG. 2 , when the user equipment accesses the cell, the user equipment can be controlled to access the recommended access cell according to the grid where the user equipment is located. . For ease of understanding, the following will be described in conjunction with the accompanying drawings.

Referring to FIG. 3, this figure is a flow chart of a method for switching a serving cell provided in an embodiment of the present application. As shown in FIG. 3, the method may include:

S301: The user equipment sends the reference signal received power of multiple uplink beams to the first wireless access apparatus.

In this embodiment, the serving cell currently corresponding to the user equipment is the first cell, and the first cell corresponds to the first wireless access apparatus. The user equipment may periodically send the reference signal received power of multiple uplink beams to the first wireless access apparatus. Wherein, the reference signal received power of the multiple uplink beams refers to the reference signal received power of each uplink beam in the multiple uplink beams. For example, if the user equipment sends the reference signal received power (level measurement value) of n uplink beams to the first wireless access device, what is received is the reference signal received power of each uplink beam in the n uplink beams, that is, n Reference signal received power. Wherein, the uplink beam may be an SRS.

S302: The first wireless access apparatus determines the target grid of the user equipment in the beam space according to the reference signal received power of multiple uplink beams.

After receiving the reference signal received power of multiple uplink beams sent by the user equipment, the first wireless access apparatus determines the target grid where the user equipment is located in the beam space according to the multiple reference signal received powers of the uplink beams.

Specifically, the first wireless access device obtains the distance between the user equipment and each grid according to the reference signal received power of multiple uplink beams and the center coordinates of each grid; and determines the grid corresponding to the minimum distance as the user equipment in Target raster in beam space. Wherein, the central coordinate of the grid is represented by the reference signal received power of multiple beams, and the reference signal received power of multiple beams may be the reference signal received power of multiple uplink beams, or the reference signal received power of multiple downlink beams. power. For example, the first wireless access device receives the multi-beam SRS RSRP reported by the UE as an n-dimensional vector of (rsrp ₁ , rsrp ₂ , ... rsrp _n ), and calculates the two-dimensional relationship between the vector and the center coordinates of each grid configured on the cell The order Euclidean distance is as formula (3):

Assuming that the minimum distance is d _i* , the center coordinates of the grid where the UE is located are:

(rsrp _{i*, 1} , rsrp _{i*, 2} , ..., rsrp _{i*, n} ).

It should be noted that, in this embodiment, other distances, such as first-order Euclidean distance and Wasserstein distance, may also be used to determine the target grid of the user equipment in the beam space.

In an example, in order to reduce the overhead of the first wireless access device and prevent the first wireless access device from performing operations such as S302 each time it receives the reference signal reception power of multiple uplink beams reported by the user equipment, it may be A processing cycle is pre-configured on the first wireless access device, and only when the processing cycle is satisfied, the first wireless access device performs operations such as S302. Specifically, after receiving the reference signal received power of multiple uplink beams, the first wireless access device determines whether the time for receiving the reference signal received power of the multiple uplink beams meets a preset period; when the preset period is met, The first wireless access apparatus determines the target grid of the user equipment in the beam space according to the received power of the reference signals of the multiple uplink beams. For example, if N=4 is pre-configured, the first wireless access device determines the target grid where the user equipment is located only after receiving the multi-beam SRS RSRP on the user equipment for the tNth time, where t is a positive integer.

S303: The first wireless access device determines a recommended access cell corresponding to the target grid.

After determining the target grid where the user equipment is located in the beam space, the first wireless access device may determine the target grid according to the identity of the target grid and the corresponding relationship between the identity of the target grid and the identity of the recommended access cell The corresponding recommended access cell. Wherein, the first wireless access apparatus may obtain in advance from the network device the correspondence between the identifier of the target grid and the identifier of the recommended access cell. Wherein, the identifier of the target grid is the center coordinate of the target grid. For example, the center coordinates of the grid where the UE is located are (rsrp _{i*, 1} , rsrp _{i*, 2} , ..., rsrp _{i*, n} ), query the above correspondence to determine the recommended access cell corresponding to the grid center coordinates is cellID _i* .

Wherein, after the first wireless access device determines the recommended access cell corresponding to the target grid, it can judge whether the recommended access cell is the first cell, and if so, it does not need to perform the switching operation of the serving cell, and the first cell Provide services to user equipment. If the recommended access cell is not the first cell but the second cell, perform S304.

S304: When the recommended access cell is the second cell, the first wireless access apparatus sends a handover instruction to the user equipment.

When it is determined that the recommended access cell is the second cell instead of the first cell, the first wireless access device will send a switching instruction to the user equipment, the switching instruction includes the identifier of the second wireless access device, and is used to instruct the user equipment Access to the second cell.

S305: The user equipment accesses the second cell according to the handover instruction.

In this embodiment, after receiving the handover instruction sent by the first wireless access device, the user equipment will obtain the identity of the serving cell, that is, the identity of the second cell, from the handover instruction, so as to actively handover from the first cell to the second cell. cell to be served by the second cell.

In an example, when the first wireless access device determines that the second cell is a recommended access cell, it may send a handover request to the second wireless access device corresponding to the second cell, where the handover request includes an identifier of the user equipment, It is used to request the second cell to provide services for the user equipment.

It can be seen that in the embodiment of the present application, the wireless access device can determine the target grid where the user equipment is located in the beam space according to the received power of reference signals of multiple uplink beams reported by the user equipment and the corresponding center coordinates of each grid, and then determine The recommended access cell corresponding to the target grid is used to control the user equipment to access the recommended access cell to improve service quality.

In order to facilitate the understanding of the implementation of the embodiment of the present application, please refer to the schematic diagram of the system architecture shown in FIG.

Wherein, the flow sensing module is used to determine the center coordinates corresponding to each grid in the n-dimensional beam space and the flow information of each grid. The angular power spectrum calculation module is used to calculate the angular power spectrum of each cell in each grid in the n-dimensional beam space. The recommended access cell calculation module obtains the center coordinates of each grid in the n-dimensional beam space, the flow information of each grid, and the angular power spectrum of each cell in each grid, and calculates the corresponding It is recommended to join the community. After the recommended access cell corresponding to each grid is determined, the grid center coordinates and the corresponding recommended access cell are sent to the AAU of each cell.

It should be noted that each of the above modules can be implemented by running software, deployed in the network management system, or independently deployed in other servers, either centralized or distributed, which is not limited in this embodiment of the present application. In addition, the traffic perception module, the angular power spectrum calculation module, the recommended access cell calculation module and the AAU can interact directly or indirectly through other modules. For example, a common way of indirect interaction is that the output of each module can be stored in the database, and other modules or entities obtain the required data from the database.

Referring to FIG. 5 , this figure is a structural diagram of a serving cell handover device provided by an embodiment of the present application. This device can be applied to a first wireless access device to realize the functions of the first wireless access device in the above embodiment, wherein, The first cell corresponds to the first wireless access apparatus, the second cell corresponds to the second wireless access apparatus, the serving cell corresponding to the user equipment is the first cell, and the apparatus includes: a receiving unit 501, a determining unit 502, and Sending unit 503.

The receiving unit 501 is configured to receive reference signal received power of multiple uplink beams sent by the user equipment. For the specific implementation of the receiving unit 501, reference may be made to the related description of S301 in the embodiment shown in FIG. 3 .

The determining unit 502 is configured to determine the target grid of the user equipment in the beam space according to the reference signal received power of the multiple uplink beams. For the specific implementation of the determining unit 502, reference may be made to the relevant description of S302 in the embodiment shown in FIG. 3 .

The determining unit 502 is further configured to determine a recommended access cell corresponding to the target grid, where the recommended access cell corresponding to the target grid is determined according to traffic information corresponding to the target grid. For the specific implementation of the determining unit 502, reference may be made to the relevant description of S303 in the embodiment shown in FIG. 3 .

A sending unit 503, configured to send a handover instruction to the user equipment when the recommended access cell is the second cell, where the handover instruction includes an identifier of the second wireless access device, and the handover instruction It is used to instruct the user equipment to access the second cell. For the specific implementation of the sending unit 503, reference may be made to the relevant description of S304 in the embodiment shown in FIG. 3 .

In a specific implementation manner, the sending unit 503 is further configured to send a handover request to the second wireless access device, where the handover request includes the identifier of the user equipment, and the handover request is used to request The second cell provides services for the user equipment.

In a specific implementation manner, the determining unit 502 is specifically configured to obtain the distance between the user equipment and each grid according to the reference signal received power of the multiple uplink beams and the center coordinate of each grid , the center coordinates of the grid are represented by the reference signal received power of multiple beams; the grid corresponding to the minimum distance is determined as the target grid of the user equipment in the beam space.

In a specific implementation manner, the receiving unit 501 is further configured to receive the correspondence sent by the network device, the correspondence including the identification of the target grid and the identification of the recommended access cell Correspondence: the determining unit is specifically configured to determine a recommended access cell corresponding to the target grid according to the identifier of the target grid and the correspondence.

In a specific implementation manner, the determining unit 502 is specifically configured to determine that the time for receiving the reference signal received power of the multiple uplink beams satisfies a preset period; The reference signal received power of the multiple uplink beams is used to determine the target grid of the user equipment in the beam space.

It should be noted that, for implementation of each unit in this embodiment, reference may be made to relevant descriptions in the foregoing method embodiments, and details are not repeated in this embodiment.

Referring to FIG. 6 , this figure is a structural diagram of an apparatus for determining a serving cell provided in an embodiment of the present application. This apparatus can be applied to network equipment to realize the functions of the network equipment in the above-mentioned embodiment, wherein multiple cells covered by the beam space Each cell in is divided into multiple grids, and the beam space is determined according to the received power of reference signals of multiple beams. The apparatus includes: an acquiring unit 601 , a determining unit 602 and a sending unit 603 .

The obtaining unit 601 is configured to obtain, for any grid in the beam space, one or more cells corresponding to the corresponding grid and traffic information corresponding to the corresponding grid, where the one or more cells corresponding to the corresponding grid are The cell where the downlink beam received by the user equipment located in the grid is located, and the multiple cells spatially covered by the beam include one or more cells corresponding to the corresponding grid. For the specific implementation of the acquiring unit 601, reference may be made to the relevant description of S201 in the embodiment shown in FIG. 2 .

The determination unit 602 is configured to determine the recommended access cell corresponding to each grid according to one or more cells corresponding to the corresponding grid and the traffic information corresponding to the corresponding grid, and the recommended access cell corresponding to the grid is located in the The serving cell corresponding to the user equipment in the grid. For specific implementation of the determining unit 602, reference may be made to the related description of S202 in the embodiment shown in FIG. 2 .

The sending unit 603 is configured to send the recommended access cell corresponding to the grid to the wireless access device corresponding to each of the multiple cells covered by the beam space. For specific implementation of the sending unit 603, reference may be made to the related description of S203 in the embodiment shown in FIG. 2 .

In a specific implementation manner, the determining unit 602 is specifically configured to obtain the traffic information corresponding to each cell according to one or more cells corresponding to the corresponding grid, traffic information corresponding to the corresponding grid, and preset parameters. traffic, the preset parameter is the traffic ratio belonging to each cell in the traffic indicated by the traffic information corresponding to the corresponding grid; the target cell is determined according to the traffic corresponding to each cell, and the target cell is the traffic The largest cell; aiming to minimize the traffic of the target cell, determine the value of the preset parameter; determine the recommended access cell corresponding to each grid according to the value of the preset parameter.

In a specific implementation manner, the acquisition unit 601 is further configured to acquire the center coordinates and flow information corresponding to the corresponding grid, where the center coordinates corresponding to the corresponding grid are represented by the reference signal received power of multiple beams; For any grid, the angular power spectrum of each cell corresponding to the grid is obtained according to the central coordinates corresponding to the grid, and the angular power spectrum is used to indicate the path information between the receiving end and the transmitting end; according to the The angular power spectrum of each cell corresponding to the grid is combined with multiple grids to obtain the merged grid; according to the center coordinates and flow information corresponding to the merged multiple grids, the combined grid is obtained The center coordinates and flow information corresponding to the grids; and the sub-districts corresponding to the merged multiple grids are determined as one or more sub-districts corresponding to the merged grids.

In a specific implementation manner, the acquiring unit 601 is specifically configured to determine the overlapping cells corresponding to the two grids; The distance between the two grids is obtained from the angular power spectrum of the two grids; when it is determined that the distance between the two grids is less than the preset distance threshold, it is determined that the two grids belong to the same classification.

In a specific implementation manner, the sending unit 603 is specifically configured to send the corresponding relationship including the identifier corresponding to the grid and the identifier of the recommended access cell corresponding to the grid to the AAU.

It should be noted that, for implementation of each unit in this embodiment, reference may be made to relevant descriptions in the foregoing embodiments, and details are not repeated in this embodiment.

Fig. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application. The network device may be, for example, the first wireless access device or network device in the embodiments shown in Fig. 2-Fig. 4, or it may also be the network device in Fig. 5 The devices of the serving cell switching apparatus 500 in the illustrated embodiment or the serving cell determining apparatus 600 in the embodiment shown in FIG. 6 are implemented.

Referring to FIG. 7 , the network device 700 includes at least a processor 710 . The network device 700 may also include a communication interface 720 and a memory 730 . The number of processors 710 in the network device 700 may be one or more, and one processor is taken as an example in FIG. 7 . In the embodiment of the present application, the processor 710, the communication interface 720, and the memory 730 may be connected through a bus system or in other ways, where connection through a bus system 740 is taken as an example in FIG. 7 .

The processor 710 may be a CPU, an NP, or a combination of a CPU and an NP. The processor 710 may further include a hardware chip. The aforementioned hardware chip may be an application-specific integrated circuit (application-specific integrated circuit, ASIC), a programmable logic device (programmable logic device, PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), a general array logic (generic array logic, GAL) or any combination thereof.

When the network device is the first wireless access device, the processor 710 may perform the above method embodiment to determine the target grid of the user equipment in the beam space according to the received power of reference signals of multiple uplink beams and determine the recommendation corresponding to the target grid. Access the community.

The communication interface 720 is used to receive and send packets, specifically, the communication interface 720 may include a receiving interface and a sending interface. Wherein, the receiving interface may be used to receive messages, and the sending interface may be used to send messages. There may be one or more communication interfaces 720 .

The memory 730 may include a volatile memory (English: volatile memory), such as a random-access memory (random-access memory, RAM); the memory 730 may also include a non-volatile memory (English: non-volatile memory), such as a fast Flash memory (English: flash memory), hard disk (hard disk drive, HDD) or solid-state drive (solid-state drive, SSD); the memory 730 may also include a combination of the above types of memory. The memory 730 may, for example, store the preceding first BGP route.

Optionally, the memory 730 stores operating systems and programs, executable modules or data structures, or their subsets, or their extended sets, wherein the programs may include various operating instructions for implementing various operations. The operating system may include various system programs for implementing various basic services and processing hardware-based tasks. The processor 710 can read the program in the memory 730 to implement the serving cell handover method or the serving cell determination method provided in the embodiment of the present application.

Wherein, the memory 730 may be a storage device in the network device 700 , or may be a storage device independent of the network device 700 .

The bus system 740 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus or the like. The bus system 740 can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 7 , but it does not mean that there is only one bus or one type of bus.

FIG. 8 is a schematic structural diagram of another network device 800 provided by the embodiment of the present application. The network device 800 can be configured as the first wireless access device or network device in the embodiments shown in FIGS. 2-4 , or it can also be The equipment of the serving cell switching apparatus 500 in the embodiment shown in FIG. 5 or the serving cell determining apparatus 600 in the embodiment shown in FIG. 6 are implemented.

The network device 900 includes: a main control board 910 and an interface board 930 .

The main control board 910 is also called a main processing unit (main processing unit, MPU) or a route processing card (route processor card). Equipment maintenance, protocol processing functions. The main control board 910 includes: a CPU 911 and a memory 912 .

The interface board 830 is also called a line interface unit card (line processing unit, LPU), a line card (line card), or a service board. The interface board 830 is used to provide various service interfaces and implement forwarding of data packets. The service interface includes but is not limited to an Ethernet interface, a POS (Packet over SONET/SDH) interface, etc., and the Ethernet interface is, for example, a flexible Ethernet service interface (Flexible Ethernet Clients, FlexE Clients). The interface board 830 includes: a central processing unit 831 , a network processor 832 , a forwarding entry storage 834 and a physical interface card (ph8sical interface card, PIC) 833 .

The CPU 831 on the interface board 830 is used to control and manage the interface board 830 and communicate with the CPU 811 on the main control board 810 .

The network processor 832 is configured to implement message forwarding processing. The form of the network processor 832 may be a forwarding chip. Specifically, the processing of the uplink message includes: processing of the inbound interface of the message, lookup of the forwarding table; processing of the downlink message: lookup of the forwarding table, and so on.

The physical interface card 833 is used to implement the interconnection function of the physical layer. The original traffic enters the interface board 830 through this, and the processed packets are sent out from the physical interface card 833 . The physical interface card 833 includes at least one physical interface, which is also called a physical port. The physical interface card 833 is also called a daughter card, which can be installed on the interface board 830, and is responsible for converting the photoelectric signal into a message, checking the validity of the message and forwarding it to the network processor 832 for processing. In some embodiments, the central processor 831 of the interface board 830 can also execute the functions of the network processor 832 , such as implementing software forwarding based on a general-purpose CPU, so that the physical interface card 833 does not need the network processor 832 .

Optionally, the network device 800 includes multiple interface boards. For example, the network device 800 further includes an interface board 840 , and the interface board 840 includes: a central processing unit 841 , a network processor 842 , a forwarding entry storage 844 and a physical interface card 843 .

Optionally, the network device 800 further includes a switching fabric unit 820 . The SFU 820 may also be called a switch fabric unit (SFU). In the case that the network device has multiple interface boards 830, the switching fabric board 820 is used to complete data exchange between the interface boards. For example, the interface board 830 and the interface board 840 may communicate through the switching fabric board 820 .

The main control board 810 is coupled to the interface board 830 . E.g. The main control board 810, the interface board 830, the interface board 840, and the switching fabric board 820 are connected to the system backplane through the system bus to realize intercommunication. In a possible implementation manner, an inter-process communication protocol (inter-process communication, IPC) channel is established between the main control board 810 and the interface board 830, and the main control board 810 and the interface board 830 communicate through the IPC channel.

Logically, the network device 800 includes a control plane and a forwarding plane. The control plane includes a main control board 810 and a central processing unit 831. The forwarding plane includes various components for performing forwarding, such as a forwarding entry storage 834, a physical interface card 833, and a network processing device 832. The control plane executes router functions, generates forwarding tables, processes signaling and protocol packets, configures and maintains device status, and sends the generated forwarding tables to the forwarding plane. On the forwarding plane, the network processor 832 based on the control plane The issued forwarding table looks up and forwards the packets received by the physical interface card 833 . The forwarding table issued by the control plane may be stored in the forwarding table item storage 834 . In some embodiments, the control plane and the forwarding plane can be completely separated and not on the same device.

If the network device 800 is configured as the first wireless access device, the central processing unit 811 can determine the target grid of the user equipment in the beam space according to the received power of reference signals of multiple uplink beams, and determine the recommended access corresponding to the target grid district. The network processor 832 may trigger the physical interface card 833 to send the switching instruction to the second wireless access device.

If the network device 800 is configured as a network device, the central processor 811 may determine a recommended access cell corresponding to each grid according to one or more cells corresponding to the corresponding grid and traffic information corresponding to the corresponding grid. The network processor 832 may trigger the physical interface 833 to send the recommended access cell corresponding to each grid to the wireless access device corresponding to each cell.

It should be understood that the receiving unit 501 in the serving cell switching apparatus 500 may be equivalent to the physical interface card 833 or the physical interface card 843 in the network device 800; Physical interface card 833 or physical interface card 843 . The determining unit 502 and the like in the serving cell switching apparatus 500 may be equivalent to the central processing unit 811 or the central processing unit 831 in the network device 800 . The determining unit 602 and the like in the serving cell determining apparatus 600 may be equivalent to the central processing unit 811 or the central processing unit 831 in the network device 800 .

It should be understood that the operations on the interface board 840 in the embodiment of the present application are consistent with the operations on the interface board 830 , and are not repeated for brevity. It should be understood that the network device 800 in this embodiment may correspond to the controller or network device in each of the foregoing method embodiments, and the main control board 810, the interface board 830, and/or the interface board 840 in the network device 800 may implement the foregoing various methods. For the sake of brevity, the functions and/or various steps implemented by the first wireless access device or network device in the method embodiment are not described in detail here.

It should be understood that there may be one or more main control boards, and when there are multiple main control boards, it may include an active main control board and a standby main control board. There may be one or more interface boards. The stronger the data processing capability of the network device, the more interface boards it provides. There may also be one or more physical interface cards on the interface board. There may be no SFU, or there may be one or more SFUs. When there are multiple SFUs, they can jointly implement load sharing and redundant backup. Under the centralized forwarding architecture, the network device does not need a switching network board, and the interface board undertakes the processing function of the service data of the entire system. Under the distributed forwarding architecture, the network device can have at least one SFU, through which the data exchange between multiple interface boards can be realized, and large-capacity data exchange and processing capabilities can be provided. Therefore, the data access and processing capabilities of network devices with a distributed architecture are greater than those with a centralized architecture. Optionally, the form of the network device can also be that there is only one board, that is, there is no switching fabric board, and the functions of the interface board and the main control board are integrated on this board. At this time, the central processing unit and the main control board on the interface board The central processing unit on the board can be combined into one central processing unit on the board to perform the superimposed functions of the two. The data exchange and processing capabilities of this form of equipment are low (for example, low-end switches or routers and other network equipment). Which architecture to use depends on the specific networking deployment scenario.

In some possible embodiments, the foregoing first wireless access device or network device may be implemented as a virtualization device. For example, the virtualization device may be a virtual machine (English: Virtual Machine, VM) running a program for sending packets, and the virtual machine is deployed on a hardware device (for example, a physical server). A virtual machine refers to a complete computer system that is simulated by software and has complete hardware system functions and runs in a completely isolated environment. The virtual machine can be configured as a first wireless access device or a network device. For example, the first wireless access device or network device may be implemented based on a common physical server combined with a Network Functions Virtualization (Network Functions Virtualization, NFV) technology. The first wireless access device or network device is a virtual host, a virtual router or a virtual switch. Those skilled in the art can combine the NFV technology to virtualize the wireless access device or network device with the above functions on a general physical server by reading this application, and details will not be repeated here.

It should be understood that the foregoing network devices in various product forms respectively have any function of the first wireless access device or the network device in the foregoing method embodiments, which will not be repeated here.

The embodiment of the present application also provides a chip, including a processor and an interface circuit, and the interface circuit is used to receive instructions and transmit them to the processor; the processor, for example, may be one of the serving cell switching devices 500 shown in FIG. 5 A specific implementation form may be used to execute the above method for determining a serving cell. Wherein, the processor is coupled with a memory, and the memory is used to store a program or an instruction. When the program or instruction is executed by the processor, the system-on-a-chip implements the method in any one of the above method embodiments.

Optionally, there may be one or more processors in the chip system. The processor can be realized by hardware or by software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented by software, the processor may be a general-purpose processor implemented by reading software codes stored in a memory.

Optionally, there may be one or more memories in the chip system. The memory can be integrated with the processor, or can be set separately from the processor, which is not limited in this application. Exemplarily, the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be respectively arranged on different chips. The setting method of the processor is not specifically limited.

Exemplarily, the chip system may be a field programmable gate array (field programmable gate array, FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC), It can also be a central processing unit (central processor unit, CPU), it can also be a network processor (network processor, NP), it can also be a digital signal processing circuit (digital signal processor, DSP), it can also be a microcontroller (micro controller unit, MCU), and can also be a programmable logic device (programmable logic device, PLD) or other integrated chips.

The embodiment of the present application also provides a computer-readable storage medium, including instructions or computer programs, which, when run on a computer, cause the computer to execute the method for determining a serving cell or the method for switching a serving cell provided in the above embodiments.

The embodiment of the present application also provides a computer program product including an instruction or a computer program, which, when run on a computer, causes the computer to execute the method for determining a serving cell or the method for switching a serving cell provided in the above embodiments.

The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

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

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

A unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each business unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software business units.

If the integrated unit is realized in the form of a software business unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including instructions to make a

A computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

Those skilled in the art should be aware that, in one or more examples above, the services described in the present invention may be implemented by hardware, software, firmware or any combination thereof. When implemented in software, the services may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above specific implementation manners have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation manners of the present invention.

Above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be applied to the foregoing embodiments The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the application.

Claims

A serving cell handover method, characterized in that the first cell corresponds to the first wireless access device, the second cell corresponds to the second wireless access device, the serving cell corresponding to the user equipment is the first cell, and the Methods include:

The first wireless access apparatus receives reference signal received power of multiple uplink beams sent by the user equipment;

The first wireless access apparatus determines the target grid of the user equipment in the beam space according to the reference signal received power of the multiple uplink beams;

The first wireless access device determines a recommended access cell corresponding to the target grid, where the recommended access cell corresponding to the target grid is determined according to traffic information corresponding to the target grid;

When the recommended access cell is the second cell, the first wireless access device sends a handover instruction to the user equipment, the handover instruction includes an identifier of the second wireless access device, the The handover instruction is used to instruct the user equipment to access the second cell.
The method according to claim 1, further comprising:

The first wireless access apparatus sends a handover request to the second wireless access apparatus, the handover request includes the identifier of the user equipment, and the handover request is used to request the second cell to be the user equipment Provide services.
The method according to claim 1 or 2, wherein the first wireless access device determines the target grid of the user equipment in the beam space according to the received power of reference signals of the multiple uplink beams, comprising:

The first wireless access apparatus obtains the distance between the user equipment and each grid according to the reference signal received power of the plurality of uplink beams and the center coordinate of each grid, and the center coordinate of the grid is determined by multiple The reference signal received power representation of beams;

The first wireless access apparatus determines the grid corresponding to the minimum distance as the target grid of the user equipment in the beam space.
The method according to any one of claims 1-3, wherein the first wireless access device determines the recommended access cell corresponding to the target grid, comprising:

The first wireless access apparatus receives a correspondence sent by a network device, where the correspondence includes a correspondence between an identifier of the target grid and an identifier of the recommended access cell;

The first wireless access device determines the recommended access cell corresponding to the target grid according to the identifier of the target grid and the corresponding relationship.
The method according to claim 4, wherein the identifier of the target grid is the center coordinate of the target grid.
The method according to any one of claims 1-5, wherein the first wireless access device determines the target grid of the user equipment in the beam space according to the reference signal received power of the multiple uplink beams ,include:

The first wireless access device determines that the time for receiving the reference signal received power of the plurality of uplink beams satisfies a preset period;

The first wireless access apparatus determines the target grid of the user equipment in the beam space according to the reference signal received powers of the multiple uplink beams received within the preset period.
The method according to any one of claims 1-6, wherein the reference signal received powers of the multiple uplink beams are channel sounding reference signal received powers of the multiple uplink beams.
A method for determining a serving cell, characterized in that each cell in multiple cells covered by a beam space is divided into multiple grids, the beam space is determined according to the reference signal received power of multiple beams, the Methods include:

For any grid in the beam space, the network device obtains one or more cells corresponding to the corresponding grid and traffic information corresponding to the corresponding grid, and the one or more cells corresponding to the corresponding grid are located in the grid The cell where the downlink beam received by the user equipment of the grid is located, and the multiple cells covered by the beam space include one or more cells corresponding to the corresponding grid;

The network device determines the recommended access cell corresponding to each grid according to one or more cells corresponding to the corresponding grid and the traffic information corresponding to the corresponding grid, and the recommended access cell corresponding to the grid is located in the grid the serving cell corresponding to the user equipment;

The network device sends the recommended access cell corresponding to the grid to the wireless access device corresponding to each of the multiple cells covered by the beam space.
The method according to claim 8, wherein the network device determines the recommended access cell corresponding to the corresponding grid according to one or more cells corresponding to the corresponding grid and the traffic information corresponding to the corresponding grid, including :

The network device acquires traffic corresponding to each cell according to one or more cells corresponding to the corresponding grid, traffic information corresponding to the corresponding grid, and preset parameters, and the preset parameter is The proportion of the traffic belonging to each cell in the traffic indicated by the traffic information of ;

The network device determines a target cell according to the traffic corresponding to each cell, and the target cell is a cell with the largest traffic;

The network device determines the value of the preset parameter with the goal of minimizing the traffic of the target cell;

The network device determines the recommended access cell corresponding to each grid according to the value of the preset parameter.
The method according to claim 8 or 9, wherein after the network device acquires one or more cells corresponding to the corresponding grid and the traffic information corresponding to the corresponding grid, the method further comprises:

The network device acquires center coordinates and traffic information corresponding to the corresponding grid, where the center coordinates corresponding to the corresponding grid are represented by reference signal received powers of multiple beams;

For any grid, the network device obtains the angular power spectrum of each cell corresponding to the grid according to the central coordinates corresponding to the grid, and the angular power spectrum is used to indicate the path information between the receiving end and the sending end ;

The network device merges multiple grids according to the angular power spectrum of each cell corresponding to the grids to obtain a combined grid;

The network device obtains the center coordinates and flow information corresponding to the merged grids according to the center coordinates and flow information corresponding to the merged multiple grids;

The network device determines the cell corresponding to each of the merged multiple grids as one or more cells corresponding to the merged grid.
The method according to claim 10, wherein the network device merges a plurality of grids according to the angular power spectrum of each cell corresponding to the grid to obtain a combined grid, comprising:

The network device determines whether the two grids belong to the same category according to the angular power spectrum of each cell corresponding to the two grids;

The network device merges all grids belonging to the same category to obtain a merged grid.
The method according to claim 11, wherein the network device determines whether the two grids belong to the same category according to the angular power spectrum of each cell corresponding to the two grids, including:

The network device determines overlapping cells corresponding to the two grids;

The network device obtains the distance between the two grids according to the number of overlapping cells and the angular power spectrum of each cell in the overlapping cells to the two grids;

When the network device determines that the distance between the two grids is less than a preset distance threshold, it determines that the two grids belong to the same category.
The method according to any one of claims 8-12, wherein the network device sends the recommended access cell corresponding to the grid to the wireless access device corresponding to each cell, including:

The network device sends the corresponding relationship including the identifier corresponding to the grid and the identifier of the recommended access cell corresponding to the grid to the wireless access device corresponding to each cell.
A serving cell switching device, wherein the first cell corresponds to the device, the second cell corresponds to the second wireless access device, the serving cell corresponding to the user equipment is the first cell, and the device includes:

a receiving unit, configured to receive reference signal received power of multiple uplink beams sent by the user equipment;

a determining unit, configured to determine the target grid of the user equipment in the beam space according to the reference signal received power of the plurality of uplink beams;

The determining unit is further configured to determine a recommended access cell corresponding to the target grid, where the recommended access cell corresponding to the target grid is determined according to traffic information corresponding to the target grid;

a sending unit, configured to send a switching instruction to the user equipment when the recommended access cell is the second cell, the switching instruction includes an identifier of the second wireless access device, and the switching instruction uses Instructing the user equipment to access the second cell.
The apparatus according to claim 14, wherein the sending unit is further configured to send a handover request to the second wireless access apparatus, the handover request includes the identifier of the user equipment, and the handover request It is used to request the second cell to provide the service for the user equipment.
The device according to claim 14 or 15, wherein the determining unit is specifically configured to obtain the user equipment and each grids, the center coordinates of the grids are represented by the reference signal received power of multiple beams; the grid corresponding to the minimum distance is determined as the target grid of the user equipment in the beam space.
The square device according to any one of claims 14-16, wherein the receiving unit is further configured to receive the correspondence sent by the network device, the correspondence includes the identifier of the target grid and the Correspondence between identities of recommended access cells;

The determining unit is specifically configured to determine a recommended access cell corresponding to the target grid according to the identifier of the target grid and the corresponding relationship.
The device according to claim 17, wherein the identifier of the target grid is the center coordinate of the target grid.
The device according to any one of claims 14-18, wherein the determining unit is specifically configured to determine that the time for receiving the reference signal received power of the plurality of uplink beams satisfies a preset period; according to the The reference signal received powers of the multiple uplink beams received within a preset period determine the target grid of the user equipment in the beam space.
The apparatus according to any one of claims 14-19, wherein the reference signal received powers of the multiple uplink beams are channel sounding reference signal received powers of the multiple uplink beams.
A device for determining a serving cell, characterized in that each of the multiple cells covered by the beam space is divided into multiple grids, the beam space is determined according to the received power of reference signals of multiple beams, the Devices include:

The obtaining unit is configured to obtain, for any grid in the beam space, one or more cells corresponding to the corresponding grid and traffic information corresponding to the corresponding grid, where the one or more cells corresponding to the corresponding grid are located in The cell where the downlink beam received by the user equipment of the grid is located, and the multiple cells covered by the beam space include one or more cells corresponding to the corresponding grid;

A determining unit, configured to determine a recommended access cell corresponding to each grid according to one or more cells corresponding to the corresponding grid and traffic information corresponding to the corresponding grid, the recommended access cell corresponding to the grid is located in the grid The serving cell corresponding to the user equipment of the grid;

A sending unit, configured to send the recommended access cell corresponding to the grid to the active antenna unit wireless access device corresponding to each of the multiple cells covered by the beam space.
The device according to claim 21, wherein the determining unit is specifically configured to obtain each The traffic corresponding to the cell, the preset parameter is the proportion of traffic belonging to each cell in the traffic indicated by the traffic information corresponding to the corresponding grid; the target cell is determined according to the traffic corresponding to each cell, and the target The cell is the cell with the largest traffic; with the goal of minimizing the traffic of the target cell, the value of the preset parameter is determined; and the recommended access cell corresponding to each grid is determined according to the value of the preset parameter.
The device according to claim 21 or 22, wherein the acquisition unit is further configured to acquire the center coordinates and flow information corresponding to the corresponding grid, and the center coordinates corresponding to the corresponding grid are determined by the reference of multiple beams. Signal received power representation; for any grid, obtain the angular power spectrum of each cell corresponding to the grid according to the central coordinates corresponding to the grid, and the angular power spectrum is used to indicate the path between the receiving end and the transmitting end Information; multiple grids are merged according to the angular power spectrum of each cell corresponding to the grid to obtain the merged grid; according to the center coordinates and flow information corresponding to the merged multiple grids, the obtained The center coordinates and flow information corresponding to the merged grids; and the cells corresponding to the multiple merged grids are determined as one or more cells corresponding to the merged grids.
The device according to claim 23, wherein the acquiring unit is specifically configured to determine whether the two grids belong to the same category according to the angular power spectrum of each cell corresponding to the two grids; All rasters belonging to the same category are merged to obtain a merged raster.
The device according to claim 24, wherein the acquiring unit is specifically configured to determine the overlapping cells corresponding to the two grids; according to the number of the overlapping cells and the number of each cell in the overlapping cells The angular power spectrum of the two grids obtains the distance between the two grids;

When it is determined that the distance between the two grids is less than a preset distance threshold, it is determined that the two grids belong to the same category.
The device according to any one of claims 21-25, wherein the sending unit is specifically configured to include the correspondence between the identification corresponding to the grid and the identification of the recommended access cell corresponding to the grid. The relationship is sent to the wireless access device corresponding to each cell.
A communication device, characterized in that the device includes: a processor and a memory;

said memory for storing instructions or computer programs;

The processor is configured to execute the instructions or computer programs in the memory, so that the communication device executes the method according to any one of claims 1-7.
A communication device, characterized in that the device includes: a processor and a memory;

said memory for storing instructions or computer programs;

The processor is configured to execute the instructions or computer programs in the memory, so that the communication device executes the method according to any one of claims 8-13.
A computer-readable storage medium, characterized by comprising instructions, which, when run on a computer, cause the computer to perform the method described in any one of claims 1-13 above.