CN117177312A

CN117177312A - Communication switching method, device, base station and medium

Info

Publication number: CN117177312A
Application number: CN202210581683.9A
Authority: CN
Inventors: 邓也; 谭裴; 潘浩; 王西点; 陈燕雷; 尚蔼; 古莉姗; 叶敏; 张威; 邓柯佳
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Design Institute Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Design Institute Co Ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2023-12-05

Abstract

The embodiment of the invention relates to the technical field of communication and discloses a communication switching method, a device, a base station and a medium, wherein the method comprises the following steps: receiving AMF network element to send first information, wherein the first information is used for indicating to establish the latest first service quality of service (QoS) Flow; determining a periodic common-frequency measurement configuration based on the first QoS Flow; transmitting measurement control information to a calling terminal; receiving N periodic measurement reports sent by a calling terminal based on periodic common-frequency measurement configuration in a preset time period; generating a target cell list based on the periodic measurement reports in case that the quality of service in consecutive M periods is greater than a threshold value based on the N periodic measurement reports; and selecting target cells meeting the set requirements from the target cell list, and sending the same-frequency switching request to the target cells. By the mode, the embodiment of the invention realizes the method for starting the same-frequency switching process based on the service quality determination.

Description

Communication switching method, device, base station and medium

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a communication switching method, a device, a base station and a medium.

Background

In a mobile communication system, a service cell with better service quality can be continuously searched to provide service for user equipment, so that the user equipment is switched from one cell to a neighboring cell, and better service quality can be obtained. However, the existing cell switching strategy may cause problems such as delay and jitter.

Disclosure of Invention

In view of the above problems, embodiments of the present invention provide a communication switching method, apparatus, base station, and computer readable storage medium, which are used to determine to start an on-channel switching process based on quality of service, so as to solve the problems of delay, jitter, and the like in the prior art.

According to an aspect of an embodiment of the present invention, there is provided a communication handover method, the method including:

the method comprises the steps that an AMF network element receives access and mobile management functions and sends first information, wherein the first information is used for indicating to establish the latest first service quality of service (QoS) Flow;

determining a periodic common-frequency measurement configuration based on the first QoS Flow;

transmitting measurement control information to a calling terminal, wherein the measurement control information is used for indicating the periodic same-frequency measurement configuration;

receiving N periodic measurement reports sent by a calling terminal based on the periodic common-frequency measurement configuration in a preset time period;

Generating a target cell list based on the periodic measurement reports when the service quality in the continuous M periods is greater than a threshold value based on the N periodic measurement reports;

and selecting target cells meeting the set requirements from the target cell list, and sending the same-frequency switching request to the target cells.

In an optional manner, the method further includes, before generating the target cell list based on the periodic measurement reports, if the quality of service in the consecutive M periods is greater than a threshold value based on the N periodic measurement reports:

and determining whether the packet loss rate in the continuous M periods is greater than a packet loss rate threshold value or not based on the fields of the uplink packet loss rate and/or the fields of the downlink packet loss rate in the N periodic measurement reports.

In an optional manner, the determining, based on the first QoS Flow, a periodic on-channel measurement configuration includes:

detecting whether a second QoS Flow other than the first QoS Flow exists;

and determining a periodic same-frequency measurement configuration based on the traffic priorities of the first QoS Flow and the second QoS Flow when the second QoS Flow exists.

And taking the periodic measurement configuration corresponding to the first QoS Flow as periodic same-frequency measurement configuration when the second QoS Flow does not exist.

In an optional manner, the determining the periodic on-channel measurement configuration based on the traffic priorities of the first QoS Flow and the second QoS Flow includes:

comparing the service priorities of the first QoS Flow and the second QoS Flow;

in the case that the priority of the first QoS Flow is higher than the service priority of the second QoS Flow, taking the periodic measurement configuration corresponding to the first QoS Flow as the periodic same-frequency measurement configuration;

and taking the periodic measurement configuration corresponding to the second QoS Flow as periodic same-frequency measurement configuration under the condition that the priority of the first QoS Flow is not higher than the service priority of the second QoS Flow.

In an alternative manner, the setting requirement includes: and the signal receiving power reaches a threshold value when the signal receiving power is not in the blacklist and belongs to the neighbor relation with the source cell.

In an optional manner, after the target cell meeting the set requirement is selected from the target cell list, and the on-channel handover request is sent to the target cell, the method further includes:

Receiving AMF network elements to send second information, wherein the second information is used for indicating to release the first QoSFlow;

releasing the first QoS Flow, and sending an instruction for deleting the periodic common-frequency measurement configuration to the calling terminal.

According to another aspect of an embodiment of the present invention, there is provided a communication switching apparatus including:

a first receiving module, configured to receive first information sent by an AMF network element, where the first information is used to indicate to establish a latest first QoS Flow;

a determining module, configured to determine a periodic common-frequency measurement configuration based on the first QoS Flow;

the first sending module is used for sending measurement control information to the calling terminal, wherein the measurement control information is used for indicating the periodic same-frequency measurement configuration;

the second receiving module is used for receiving N periodic measurement reports sent by the calling terminal based on the periodic same-frequency measurement configuration in a preset time period;

a generating module, configured to generate a target cell list based on the N periodic measurement reports, where the quality of service in the consecutive M periods is greater than a threshold value;

and the screening module is used for screening target cells meeting the set requirements from the target cell list and sending the same-frequency switching request to the target cells.

In an alternative, the apparatus further comprises:

and the packet loss rate determining module is used for determining whether the packet loss rate in the continuous M periods is greater than a packet loss rate threshold value based on the fields of the uplink packet loss rate and/or the fields of the downlink packet loss rate in the N periodic measurement reports.

In an alternative manner, the determining module includes:

a detection sub-module for detecting whether a second QoS Flow other than the first QoS Flow exists;

a first determining submodule, configured to determine a periodic common-frequency measurement configuration based on traffic priorities of the first QoS Flow and the second QoS Flow in the presence of the second QoS Flow.

And the second determining sub-determining module is used for taking the periodic measurement configuration corresponding to the first QoS Flow as the periodic same-frequency measurement configuration under the condition that the second QoS Flow does not exist.

In an alternative manner, the first determining submodule includes:

a comparing unit, configured to compare traffic priorities of the first QoS Flow and the second QoS Flow;

a first unit, configured to, when the priority of the first QoS Flow is higher than the traffic priority of the second QoS Flow, set the periodic measurement configuration corresponding to the first QoS Flow as a periodic same-frequency measurement configuration;

And a second unit, configured to, when the priority of the first QoS Flow is not higher than the traffic priority of the second QoS Flow, set the periodic measurement configuration corresponding to the second QoS Flow as a periodic same-frequency measurement configuration.

In an alternative way, the setting requirement includes: and the signal receiving power reaches a threshold value when the signal receiving power is not in the blacklist and belongs to the neighbor relation with the source cell.

In an alternative manner, after the target cell meeting the set requirement is selected from the target cell list and the on-channel handover request is sent to the target cell, the apparatus further includes:

a third receiving module, configured to receive an AMF network element to send second information, where the second information is used to instruct to release the first QoS Flow;

and the releasing module is used for releasing the first QoS Flow and sending an instruction for deleting the periodic common-frequency measurement configuration to the calling terminal.

According to another aspect of an embodiment of the present invention, there is provided a base station including: an antenna, a memory, one or more processors, and a communication interface;

the antenna is used for receiving and transmitting information;

the one or more processors are connected with the memory through a communication interface;

The memory stores instructions executable by the at least one processor to enable the at least one processor to:

In an alternative, the at least one processor may be capable of: the method further includes, before generating a target cell list based on the periodic measurement reports, if the quality of service in the consecutive M periods is greater than a threshold value based on the N periodic measurement reports:

In an alternative, the at least one processor may be capable of:

the determining, based on the first QoS Flow, a periodic common frequency measurement configuration includes:

detecting whether a second QoS Flow other than the first QoS Flow exists;

In an alternative, the at least one processor may be capable of:

the determining the periodic common-frequency measurement configuration based on the traffic priorities of the first QoS Flow and the second QoS Flow includes:

comparing the service priorities of the first QoS Flow and the second QoS Flow;

In an alternative, the at least one processor may be capable of:

the setting requirements include: and the signal receiving power reaches a threshold value when the signal receiving power is not in the blacklist and belongs to the neighbor relation with the source cell.

In an alternative, the at least one processor may be capable of:

after the target cell meeting the set requirement is selected from the target cell list and the same-frequency switching request is sent to the target cell, the method further comprises the following steps:

receiving AMF network elements to send second information, wherein the second information is used for indicating to release the first QoS Flow;

According to yet another aspect of embodiments of the present invention, there is provided a computer-readable storage medium having stored therein at least one executable instruction for causing a base station to:

In an alternative, the executable instructions cause the base station to:

the generating, based on the N periodic measurement reports, before generating the target cell list based on the periodic measurement reports, in a case that the quality of service in the M consecutive periods is greater than a threshold, further includes:

In an alternative, the executable instructions cause the base station to:

detecting whether a second QoS Flow other than the first QoS Flow exists;

In an alternative, the executable instructions cause the base station to:

comparing the service priorities of the first QoS Flow and the second QoS Flow;

In an alternative, the executable instructions cause the base station to:

In an alternative, the executable instructions cause the base station to: the method further includes, before generating a target cell list based on the periodic measurement reports, if the quality of service in the consecutive M periods is greater than a threshold value based on the N periodic measurement reports:

In an alternative, the executable instructions cause the base station to:

detecting whether a second QoS Flow other than the first QoS Flow exists;

In an alternative, the executable instructions cause the base station to:

comparing the service priorities of the first QoS Flow and the second QoS Flow;

In an alternative, the executable instructions cause the base station to:

According to the embodiment of the invention, the base station receives the first information sent by the AMF and indicated to establish the first QoS Flow, and configures the periodic same-frequency measurement configuration for the first QoS Flow, so that the calling terminal can perform periodic measurement of the same-frequency cells and send periodic measurement reports to the base station, according to N periodic measurement reports, under the condition that the service quality in the continuous M periods is greater than the threshold value, a target cell list is generated based on the periodic measurement reports, and a target cell meeting the set requirement is screened from the target cell list and a same-frequency switching request is sent to the target cell, so that the periodic same-frequency measurement configuration can be configured for the first QoS Flow, the calling terminal can perform periodic measurement based on the periodic same-frequency measurement configuration, and send the periodic measurement report to the base station, and determine to initiate a same-frequency switching process according to the service quality of the periodic measurement report in the continuous period, and send the same-frequency switching request according to the target cell on the measurement report when determining to initiate the switching process, thereby rapidly and accurately performing the same-frequency switching of cells, and the quality of service can be continuously changed in the process, and the time delay problem can be solved.

The foregoing description is only an overview of the technical solutions of the embodiments of the present invention, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present invention can be more clearly understood, and the following specific embodiments of the present invention are given for clarity and understanding.

Drawings

The drawings are only for purposes of illustrating embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 shows an application scenario diagram of a prior 5G system;

fig. 2 shows a flowchart of a communication switching method provided by an embodiment of the present invention;

FIG. 3 is a flow chart of a communication method according to another embodiment of the invention

Fig. 4 shows a signaling interaction diagram of a communication method according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a communication interface according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of another communication interface according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a communication interface according to an embodiment of the present invention;

FIG. 8 illustrates periodic measurement reports provided by an embodiment of the present invention;

FIG. 9 shows a flow chart of step 390 provided by an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a communication switching device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein.

A fifth generation mobile communication (5G) system includes a 5G core network (5G Core Network,5GC) and a 5G radio access network (Next Generation Radio Access Network, NG-RAN). The 5G core network is connected with the 5G access network through a Next Generation Network (NG) interface to realize the functions of a control plane and a user plane; the 5G wireless access networks are connected through an Xn interface to realize the functions of a control plane and a user plane. Fig. 1 shows an application scenario diagram of a 5G system. As shown in figure 1 of the drawings,

the core control plane may include a plurality of functional elements of access and mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF) network elements, authentication server functions (Authentication Server Function, AUSF) network elements, policy control functions (Policy Control Function, PCF) network elements, unified data management functions (unified data management, UDM) network elements, network slice selection functions (Network Slice Selection Function, NSSF) network elements, network opening functions (Network Exposure Function, NEF), and the like. The core network user plane may include user plane functions (User Plane Function, UPF) network elements. The radio access network may comprise user equipment and a base station.

The 5G networking may include NSA (Non-independent) networking and SA (independent) networking. The NSA networking is to use a fourth generation mobile communication (4 generation, 4G) to independently deploy a control plane (4G bearer control signaling), to jointly deploy a user plane (5G and 4G bearer user plane data) or to independently deploy a user plane (only 5G bearer user plane data) by 5G and SA networking is to use a 5G independent deployment control plane and a user plane (5G independent bearer control signaling and user plane data).

In a fifth generation mobile communication (5G) system, a 5G QoS (Quality of Serviceflow, quality of service) model based on QoS flow (Quality of Serviceflow ) is proposed in order to guarantee the end-to-end quality of service of a service, and the 5G QoS model includes GBR QoS flow (Guranteed Bit Rate QoS flow, guaranteed bit rate QoS flow) and Non-GBR QoS flow (Non-Guranteed Bit Rate QoS flow, non-guaranteed bit rate QoS flow).

The UE (User Equipment) may establish one or more PDU (Packet Data Unit) sessions with the 5G system, and each PDU session may include one or more QoS flows therein.

In a 5G communication system, when the service quality of a current serving cell is poor, a cell with better service quality needs to be selected to provide service, that is, cell handover needs to be performed. The current 5G cell switching strategy is mainly based on methods such as network coverage switching, frequency priority switching, operator priority switching, service switching, uplink interference-based inter-frequency switching and the like. However, in the above method, the service quality is relatively poor, which may cause problems such as delay and jitter.

In view of this, the inventor proposes a communication handover method, which can determine to initiate the same-frequency handover procedure according to the service quality in the continuous period in the side quantity report, and send a handover request to the target cell reported by the measurement report, so as to rapidly and accurately perform the same-frequency handover of the cell. Therefore, the high-quality service quality can be continuously maintained in the switching process, and the problems of time delay, jitter and the like are solved.

Fig. 2 shows a flowchart of a communication handover method according to an embodiment of the present invention, where the method is performed by a base station corresponding to a source cell. The source cell is the cell in which the user equipment resides. The cell is the basic unit of wireless network coverage. The base station, i.e., a public communication base station, is a radio station, and specifically, a radio reception station that performs information transfer with a user equipment through a mobile communication center in a radio coverage cell. As shown in fig. 2, the method comprises the steps of:

step 210: the receiving AMF network element sends first information, wherein the first information is used for indicating to establish the latest first QoS Flow.

The AMF network element is mainly responsible for services such as mobility management and access management. The first information may be a PDU Session Resource Modify Request message. The first QoS Flow may be a QoS Flow corresponding to various 5G traffic types. QoS Flow is the minimum granularity of 5G core network QoS control. For example, voNR (Voice on New Radio, target voice solution of 5G network) is a 5G high definition voice/video communication service, and the first QoS Flow may be a QoS Flow corresponding to the VoNR service.

Step 220: based on the first QoS Flow, a periodic on-channel measurement configuration is determined.

The periodic same-frequency measurement configuration is used for determining periodic measurement parameters of the UE in the same-frequency switching process, and the periodic measurement parameters can comprise objects, reporting periods and the like which need to be measured by the UE. Here, the measured object may select an object of the same frequency as the source cell, and the report object may include a cell list and reference signal power. The reporting period may be set according to different QoS flows. For example, for the VoNR traffic, the reporting period may be set to 1280 milliseconds.

Step 230: and sending measurement control information to the calling terminal, wherein the measurement control information is used for indicating the periodic same-frequency measurement configuration.

The calling terminal may be a calling user equipment. The measurement control information may carry information indicating a periodic on-channel measurement configuration. The measurement control information may be a measurement specific parameter, an index value or indication information. The indication information may be used to indicate whether a new periodic measurement configuration is employed.

Step 240: and receiving N periodic measurement reports sent by the calling terminal based on the periodic same-frequency measurement configuration within a preset time period.

Wherein N may be a positive integer greater than a preset threshold, optionally, the preset threshold is a positive integer not less than 3. The preset time period may be a time not shorter than N reporting periods. The periodic measurement report is the periodic measurement result of the calling terminal.

Here, the calling terminal transmits a periodic measurement report to the base station in one period. The base station receives N periodic measurement reports which are continuously sent by the calling terminal and are measured based on the periodic same-frequency measurement configuration.

Step 250: based on the N periodic measurement reports, in case the quality of service in consecutive M periods is greater than a threshold value, a target cell list is generated based on the periodic measurement reports.

Wherein M is a positive integer less than N and greater than 2. The quality of service may be a quality of service of the source cell for the first QoS Flow measured by the calling terminal. Here, the base station may analyze the quality of service in one period according to one periodic measurement report, and analyze whether the quality of service corresponding to N consecutive periodic measurement reports among the N periodic measurement reports is greater than a threshold value.

Here, the target cell list may be a neighbor cell list of the same frequency as the source cell. And the base station determines that the service quality in the continuous M periods is greater than a threshold value, and generates a target cell list according to the periodic measurement report.

Step 260: and selecting target cells meeting the set requirements from the target cell list, and sending the same-frequency switching request to the target cells.

The setting request may be a setting request for common-frequency switching. The target cell may be a cell that meets the same frequency handover requirements. The common frequency switching request is used for requesting the target cell to perform cell switching. Here, the base station screens out a target cell satisfying the same-frequency handover from the target cell list, and transmits a same-frequency handover request to the target cell so as to perform the same-frequency handover.

In the above embodiment, the periodic common-frequency measurement configuration can be configured for the first QoS Flow, so that the calling terminal performs periodic measurement based on the periodic common-frequency measurement configuration, and sends a periodic measurement report to the base station, and determines whether to initiate the common-frequency switching process according to the service quality of the periodic measurement report and the size of the threshold in the continuous period, and when determining to initiate the switching process, sends a common-frequency switching request according to the target cell reported by the measurement report, so as to perform cell common-frequency switching rapidly and accurately, thereby continuously maintaining high quality service quality in the switching process, and solving the problems of delay, jitter, and the like.

It should be noted that, in the duration of the first QoS Flow, if the calling terminal initiates other handover, after detecting that the first QoS Flow is established, the target cell also issues periodic measurement configuration to ensure that the first QoS Flow exists in the stage, and such periodic measurement is always performed.

In an alternative, step 220: based on the first QoS Flow, determining the periodic on-channel measurement configuration may include:

it is detected whether there is a second QoS Flow other than the first QoS Flow.

The second QoS Flow may be a QoS Flow corresponding to various 5G service types. The traffic types corresponding to the first QoS Flow and the second QoS Flow may be the same or different. The second QoS Flow is other QoS flows than the first QoS Flow. That is, the second QoS Flow may be a QoS Flow existing in a history time before the first information is received.

In the presence of the second QoS Flow, a periodic on-channel measurement configuration is determined based on traffic priorities of the first QoS Flow and the second QoS Flow.

The service priority may be determined according to a QoS identifier corresponding to the QoS Flow. The QoS identity may be a QCI (Quality of Service Class Identifer, quality of service class identity) or 5QI (5G QoSIdentifier,5G quality of service identity). The base station can find out the priority corresponding to the QoS Flow through the QoS identification.

Here, the base station determines, in a case where the presence of the second QoS Flow is detected, a periodic measurement configuration corresponding to the first QoS Flow or the second QoS Flow as a periodic same-frequency measurement configuration based on traffic priorities of the first QoS Flow and the second QoS Flow. That is, the base station may determine the periodic on-channel measurement configuration for the first QoS Flow based on the priorities of the plurality of QoS flows when detecting the plurality of QoS flows in parallel.

In the case where the second QoS Flow does not exist, the periodic measurement configuration corresponding to the first QoS Flow is regarded as the periodic same-frequency measurement configuration.

Here, in the case where the base station detects that there is no other QoS Flow, the periodic measurement configuration corresponding to the first QoS Flow may be directly set as the periodic same-frequency measurement configuration.

In the above embodiment, in the case that there are a plurality of QoS flows, the periodic same-frequency measurement configuration is determined according to the priority of a QoS Flow, and in the case of one QoS Flow, the periodic measurement configuration corresponding to this QoS Flow is directly used as the periodic same-frequency measurement configuration, so, for the QoS Flow service that needs to start the same-frequency switching Flow, the periodic same-frequency measurement configuration is determined based on the condition of other QoS flows that exist, so as to adaptively configure the periodic same-frequency measurement information, so that the subsequent calling terminal performs periodic measurement, and an accurate measurement result is obtained.

In an alternative manner, determining the periodic on-channel measurement configuration based on traffic priorities of the first QoS Flow and the second QoS Flow includes:

comparing the service priorities of the first QoS Flow and the second QoS Flow;

in the case that the priority of the first QoS Flow is higher than the service priority of the second QoS Flow, the periodic measurement configuration corresponding to the first QoS Flow is used as the periodic same-frequency measurement configuration;

In the case that the priority of the first QoS Flow is not higher than the traffic priority of the second QoS Flow, the periodic measurement configuration corresponding to the second QoS Flow is regarded as the periodic same-frequency measurement configuration.

Here, the base station may compare traffic priorities of the first QoS Flow and the second QoS Flow, and set a periodic measurement configuration corresponding to the QoS Flow with the highest priority as the periodic same-frequency measurement configuration.

In the above embodiment, when there are a plurality of QoS flows of different types, the periodic measurement configuration corresponding to the QoS Flow with the highest priority is used as the periodic same-frequency measurement configuration, and thus, the periodic measurement can be accurately performed so as to obtain an accurate result.

In an alternative manner, since the second QoS Flow is a QoS Flow established in a history time, the calling terminal has a periodic measurement configuration corresponding to the second QoS Flow. In the case where the periodic measurement configuration corresponding to the second QoS Flow is taken as the periodic same-frequency measurement configuration, the measurement control information may include indication information for indicating that the periodic measurement configuration corresponding to the second QoS Flow is to be used.

In an alternative manner, in the case where the periodic measurement configuration corresponding to the first QoS Flow is taken as the periodic on-channel measurement configuration, the measurement control information may include the periodic measurement configuration corresponding to the first QoS Flow. The measurement control information may also be used to instruct the calling terminal to delete the original periodic measurement configuration after receiving the measurement control information, take the periodic measurement configuration corresponding to the first QoS Flow as the periodic same-frequency measurement configuration, and perform periodic measurement.

In an alternative way, setting the requirements includes: and the signal receiving power reaches a threshold value when the signal receiving power is not in the blacklist and belongs to the neighbor relation with the source cell.

The blacklist may be a blacklist of cells for which handover is not allowed. The black list may be preconfigured at the base station. The neighbor cell is short for neighbor cell. The neighboring cells may refer to two cells covered with overlap and provided with a handover relation. The signal received power may include, but is not limited to, SSB (Synchronization Signal and Phisical Broadcast ChannelBlock, synchronization signal and physical broadcast channel block) RSRP (Reference Signal Received Power, received power of the downlink reference signal). The threshold value may be determined according to The 3GPP (The 3rd Generation Partnership Project, third generation partnership project) protocol.

Here, the base station screens the strongest cell which is not in the blacklist, belongs to the neighbor relation with the source cell and has the signal receiving power reaching the threshold value from the target cell list, and takes the strongest cell as the target cell.

In the above embodiment, the target cell list is screened through the blacklist, the neighbor cell relation and the signal receiving power to obtain the target cell, so that an excellent cell more meeting the requirement of the intra-frequency handover can be obtained, the quality of the intra-frequency handover of the cell can be improved, and the perception of the user can be improved.

In an alternative manner, at step 250: based on the N periodic measurement reports, in the case that the quality of service in consecutive M periods is greater than the threshold value, before generating the target cell list based on the periodic measurement reports, the communication handover method further includes:

based on the fields of the uplink packet loss rate in the N periodic measurement reports, determining whether the packet loss rate in the continuous M periods is greater than a packet loss rate threshold.

In the case where the periodic measurement report includes a field of an uplink packet loss rate, the packet loss rate in M periods may be the uplink packet loss rate in M periods. The packet loss rate threshold may be an uplink threshold packet loss rate threshold. The uplink threshold packet loss rate threshold may be determined according to an actual wireless network situation. For example, the uplink packet loss rate threshold corresponding to the service with 5QI of 1 may be 2.

And, the uplink packet loss rate may be an uplink air interface data bearer packet loss rate. One packet corresponds to one PDCP (Packet Data Convergence Protocol ) SDU (segment data unit, segmented data unit), and the reference point is the SDAP (Service Data Adaptation Protocol ) of the PDCP upper layer. The uplink packet loss rate can reflect the size of the packet loss rate of uplink data sent by the UE to the serving cell, and measures the main index of uplink service quality. The unit of the uplink packet loss rate is one thousandth.

Here, the field of the uplink packet loss rate may include a service identifier, a packet loss rate, and a total packet number. Optionally, in the SA scenario, the fields of the uplink packet loss rate may include 5QI, packet loss rate, and total packet number. In NSA scenario, the fields of the uplink packet loss rate may include QCI, packet loss rate, and total packet number.

In the above embodiment, the field of the uplink packet loss rate in the measurement report is used to analyze the uplink packet loss rate in the continuous period, so that the uplink packet loss rate is used as the criterion of the service quality, so as to quickly and accurately determine whether to start the same-frequency switching process.

based on the fields of the downlink packet loss rate in the N periodic measurement reports, determining whether the packet loss rate in the continuous M periods is greater than a packet loss rate threshold.

In the case where the periodic measurement report includes a field of a downlink packet loss rate, the packet loss rate in M periods may be the downlink packet loss rate in M periods. The packet loss rate threshold may be a downlink threshold packet loss rate threshold. The downlink threshold packet loss rate threshold may be determined according to an actual wireless network situation. For example, the downlink packet loss rate threshold corresponding to the service with 5QI of 1 may be 3.

And the downlink packet loss rate may be a downlink air interface data bearer packet loss rate. One packet corresponds to one RLC (Radio Link Control, radio link management) SDU (segment data unit, segmented data unit), the reference point being the RLC layer. The downlink packet loss rate can reflect the size of the packet loss rate of downlink data sent by the serving cell and measure the main index of downlink service quality. The unit of the downlink packet loss rate is one thousandth.

Here, the field of the downlink packet loss rate may include a service identifier, a packet loss rate, and a total packet number. Optionally, in the SA scenario, the fields of the downlink packet loss rate may include 5QI, packet loss rate, and total packet number. In NSA scenario, the fields of the downlink packet loss rate may include QCI, packet loss rate, and total packet number.

In the above embodiment, the downlink packet loss rate in the continuous period is analyzed through the field of the downlink packet loss rate in the measurement report, so that the downlink packet loss rate is used as the criterion of the service quality, so as to quickly and accurately determine whether to start the same-frequency switching process.

And determining whether the packet loss rate in the continuous M periods is greater than a packet loss rate threshold value based on the fields of the uplink packet loss rate and the fields of the downlink packet loss rate in the N periodic measurement reports.

In the case where the periodic measurement report includes a field of an uplink packet loss rate and a field of a downlink packet loss rate, the packet loss rates in the M periods may include the uplink packet loss rate and the downlink packet loss rate in the M periods. The packet loss rate threshold may include an uplink threshold packet loss rate threshold and a downlink threshold packet loss rate threshold. The uplink threshold packet loss rate threshold and the downlink threshold packet loss rate threshold may be determined according to actual wireless network conditions, respectively.

It should be noted that, the definition of the field of the uplink packet loss rate and the field of the downlink packet loss rate are the same as those in the foregoing embodiment, and will not be repeated here.

In the above embodiment, the uplink packet loss rate and the downlink packet loss rate in the continuous period are analyzed by measuring the field of the uplink packet loss rate and the field of the downlink packet loss rate in the report, so that the uplink packet loss rate and the downlink packet loss rate are used as the judgment basis of the service quality, and whether to start the same-frequency switching process is quickly and accurately judged.

In some embodiments, the field for the uplink packet loss rate may be mr. Nrue plrl. In order to facilitate the expansion of different types of services and the simplicity of data output in measurement and protection, the field of the uplink packet loss rate may be expressed as: service identifier-uplink packet loss rate of the service-uplink total packet number of the service. When multiple types of services are involved, the field of the uplink packet loss rate is expressed as: service identifier 1_uplink packet loss rate of the service_uplink total packet number of the service |service identifier 2_uplink packet loss rate of the service_uplink total packet number of the service | … …. Wherein, the service identifier may be 5QI or QCI.

In addition, if there is no service in the current measurement period, the field of the uplink packet loss rate may fill in the NIL.

In some embodiments, the field for the downlink packet loss rate may be mr. Nrue plrdl. In order to facilitate the expansion of different types of services and the simplicity of data output in measurement reports, the field of the downlink packet loss rate may be expressed as: service identifier-downlink packet loss rate of the service-downlink total packet number of the service. When multiple types of services are involved, the field of the downlink packet loss rate is expressed as: service identifier 1_downlink packet loss rate of the service_downlink total packet number of the service |service identifier 2_downlink packet loss rate of the service_downlink total packet number of the service | … …. Wherein, the service identifier may be 5QI or QCI.

In addition, if there is no service in the current measurement period, the field of the downlink packet loss rate may be filled in the NIL

Note that, for specific definition of the uplink packet loss rate and the downlink packet loss rate, see section 4.2.1.5 in 3GPP38.215.

When the periodic measurement report has packet loss rates corresponding to a plurality of services, and at least one packet loss rate is greater than a threshold, it may be confirmed that the packet loss rate in the period corresponding to the measurement report is greater than the threshold.

In addition, in the measurement report, the base station can distinguish the calling terminal through the amfuengaid field and distinguish the reporting time through the TimeStamp field.

In an optional manner, after the generating the target cell list based on the periodic measurement reports in the case that the quality of service in the consecutive M periods is greater than the threshold value based on the N periodic measurement reports, the communication handover method may further include:

and returning to the step of receiving N periodic measurement reports sent by the calling terminal based on the periodic same-frequency measurement configuration in a preset time period under the condition that the service quality in M continuous periods is not greater than a threshold value.

In an alternative manner, after selecting a target cell from the target cell list, which meets a set requirement, and sending an on-channel handover request to the target cell, the communication handover method further includes:

receiving AMF network element to send second information, wherein the second information is used for indicating to release the first QoS Flow;

releasing the first QoS Flow and sending an instruction for deleting the periodic common-frequency measurement configuration to the calling terminal.

Wherein, releasing the first QoS Flow may refer to releasing resources corresponding to the first QoS Flow. Here, the base station receives second information sent by the AMF network element and indicating to release the first QoS Flow, releases the first QoS Flow, and sends an instruction for deleting the periodic common-frequency measurement configuration to the calling terminal, so that the calling terminal deletes the periodic common-frequency measurement configuration. Thus, the business Flow corresponding to the first QoS Flow is ended.

Fig. 3 shows a flowchart of a communication method according to another embodiment of the present invention, and fig. 4 shows a signaling interaction diagram of a communication method according to an embodiment of the present invention, which is performed by a communication system. The communication system may include: calling UE, source base station, AMF, SMF, UPF, SBF, PCF and target base station. As shown in fig. 3 and 4, the method comprises the steps of:

step 310: the calling UE initiates a first service request to the SBC network element.

The calling UE may be a calling terminal. The first service may be any 5G service. For example, the first service may be a VONR service, and the 5QI of the first service may be 1 or 2.

Step 320: after receiving Invite message, SBC network element initiates policy request to PCF network element.

Step 330: and the PCF network element formulates a bearing strategy and transmits the bearing strategy to the SMF network element through the RAR according to the service request in the AAR message.

Here, fig. 5 shows a schematic diagram of a communication interface according to an embodiment of the present invention. As shown in fig. 5, the PCF network element finds the SMF through N7.

Step 340: the SMF network element delivers the N1N2message to the AMF network element via the NAMF COMMUNICATION N1N2message sequence.

Here, fig. 6 shows a schematic diagram of another communication interface according to an embodiment of the present invention. As in fig. 6, the smf network element triggers the establishment of the first service through N11.

Step 350: the AMF network element instructs the source base station to newly establish a QoS Flow with 5QI of 1 or 2 through a PDU Session Resource Modify Request message.

Here, fig. 7 shows a schematic diagram of yet another communication interface according to an embodiment of the present invention. As in fig. 7, the amf network element sends the message via N2.

Step 360: the source base station instructs the UE to set up a dedicated DRB on the air interface via RRC Reconfiguration message to carry either the voice stream or the video stream.

Step 370: the source base station issues a periodic measurement configuration to the calling UE through a RRC Reconfiguration message.

The periodic measurement configuration may include an on-channel measurement object, a reporting period, and a reporting object. The reporting object may include the strongest cell PCI (Physical Cell Identifier, physical cell identity) and SSB RSRP. The reporting period may be set differently for different QoS flows. For example, a 1280ms reporting period is set for the QoS Flow of the VONR. In addition, the base station can correspondingly adjust the periodic measurement configuration according to the packet loss rate. The reporting period can be properly relaxed for cells with always low packet loss. Step 380: and the calling UE reports the measurement report to the source base station in a periodic manner according to the periodic measurement configuration.

Here, fig. 8 shows a periodic measurement report provided by an embodiment of the present invention. As shown in fig. 8, the data structure of the measurement report is similar to the current network periodic measurement report.

Step 390: and the source base station judges whether to initiate a switching request flow to the target base station according to the measurement report.

In the above embodiment, the source base station determines whether to initiate a handover request procedure to the target base station according to the measurement report. Thus, whether to initiate the switching request can be judged according to the service quality, and the switching process can be initiated rapidly and accurately.

In an alternative manner, fig. 9 shows a flowchart of step 390 provided by an embodiment of the present invention, as shown in fig. 9, in step 390, the source base station determines whether to initiate a handover request procedure to the target cell according to the measurement report, including:

step 910: the source base station receives the indication of the AMF network element and establishes a QoS Flow of a new 5 QI.

Step 920: the source base station judges whether the QoS Flow aiming at the newly built 5QI is needed to be switched based on the packet loss rate. If not, the flow proceeds to step 930, and the handover request flow is ended. If yes, the process proceeds to step 940.

Step 930: and ending the switching request flow.

Step 940: it is detected whether a periodic measurement configuration is issued. If yes, the process proceeds to step 950, and if no, the process proceeds to step 970.

Step 950: and detecting whether the service priority of the newly-built 5QI QoS Flow is higher than that of the original 5QI QoS Flow corresponding to the original periodic measurement configuration. If yes, the process proceeds to step 460. If not, the process proceeds to step 970.

Step 960: deleting the original periodic measurement configuration, and issuing the latest periodic measurement configuration of the newly built 5QI QoS Flow, and turning to step 990.

Step 970: the original periodic measurement configuration is used, and the process proceeds to step 990.

Step 980: and the latest periodic measurement configuration of the newly built 5QI QoS Flow is issued to the calling side, and the step 990 is carried out.

Step 990: and analyzing whether the received continuous periodic measurement report meets the condition that the uplink and downlink packet loss rate exceeds a threshold for a plurality of continuous periods. If not, the process proceeds to step 9100, and if yes, the process proceeds to step 9110.

Step 9100: continuous monitoring is performed for periodic measurement reports.

Step 9110: and analyzing whether SSB RSRP of the strongest cell in the periodic measurement report meets a threshold, meets a neighbor relation and is not on a blacklist. If both are satisfied, the process proceeds to step 9120. If not, the process proceeds to step 9100.

Here, the strongest cell satisfying the above three conditions is the target cell.

Step 9120: and initiating a switching request to the target base station.

Here, the target base station is a base station corresponding to the target cell.

For example, during the historical time, the base station establishes a QoS Flow of 5QI of 9 and issues periodic measurement configurations for 5QI of 9. And triggering a switching flow by the base station according to the packet loss rate in the periodic measurement report with the 5QI of 9. And the current calling UE uses the VONR service again, and as the gNodeB side defines that the priority of 5QI is higher than that of 5QI and is 9, the original periodic measurement configuration is deleted, the latest periodic measurement configuration is issued, and then the packet loss threshold of 5QI is 1 or 2 is used as a trigger switching standard, and the packet loss threshold of 5QI is 9 is not used any more.

The above communication switching method may be used not only for VONR service quality determination but also for other 5QI service quality determination.

In the above embodiment, by judging the service quality and combining with the strongest neighbor cell reported by the periodic measurement report, the method can quickly and accurately switch to a better cell, and promote user perception.

Fig. 10 is a schematic structural diagram of a communication switching device according to an embodiment of the present invention. As shown in fig. 5, the communication switching apparatus may be applied to a base station, and may include:

a first receiving module 1010, configured to receive first information sent by an AMF network element, where the first information is used to indicate that a latest first QoS Flow is established.

A determining module 1020, configured to determine a periodic common frequency measurement configuration based on the first QoS Flow.

A first sending module 1030 is configured to send measurement control information to the calling terminal, where the measurement control information is used to indicate the periodic same-frequency measurement configuration.

A second receiving module 1040, configured to receive N periodic measurement reports sent by the calling terminal in a preset period of time based on the periodic same-frequency measurement configuration;

a generating module 1050, configured to generate a target cell list based on the N periodic measurement reports, where the quality of service in the consecutive M periods is greater than a threshold value, based on the periodic measurement reports;

And a screening module 1060, configured to screen the target cells from the target cell list, and send a common-frequency handover request to the target cells.

In the above embodiment, the periodic same-frequency measurement configuration can be configured for the first QoS Flow, so that the calling terminal performs periodic measurement based on the periodic same-frequency measurement configuration, sends a periodic measurement report to the base station, determines to initiate the same-frequency switching process according to the fact that the service quality of the periodic measurement report in a continuous period is greater than the threshold, and sends the same-frequency switching request according to the target cell reported by the measurement report when determining to initiate the switching process, so as to rapidly and accurately perform the same-frequency switching of the cell, thereby continuously maintaining high quality of service in the switching process, and solving the problems of delay, jitter and the like.

In an alternative manner, the apparatus may further include:

In an alternative manner, the determination module 1020 includes:

In an alternative way, the first determining submodule includes:

Fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention, and the embodiment of the present invention is not limited to the specific implementation of the base station.

As shown in fig. 6, the base station may include: an antenna 1110, a processor 1120, a communication interface (Communications Interface) 1130, a memory 1140, and a communication bus 1150.

Wherein: an antenna 1110 for receiving and transmitting information. The antenna 1110, the processor 1120, the communication interface 1130, and the memory 1140 perform communication among each other through a communication bus 1150. Communication interface 1170 is used to communicate with network elements of other devices, such as clients or other servers. Processor 1120 is configured to execute program 1160 and may specifically perform the relevant steps described above for the communication handover method embodiment.

In particular, program 1160 may comprise program code comprising computer executable instructions.

The processor 1120 may be a central processing unit, CPU, or specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement embodiments of the present invention. The one or more processors comprised by the base station may be of the same type of processor, such as one or more CPUs; but may also be different types of processors such as one or more CPUs and one or more ASICs.

A memory 1140 for storing programs 1160. Memory 1140 may comprise high-speed RAM memory or may further comprise non-volatile memory (non-volatile memory), such as at least one disk memory.

The program 1160 may be specifically invoked by the processor 1120 to cause the base station to:

In an alternative, the program 1160 may be specifically invoked by the processor 1120 to cause the base station to:

Based on the N periodic measurement reports, in a case where the quality of service in the consecutive M periods is greater than a threshold value, before generating a target cell list based on the periodic measurement reports, the method further includes:

detecting whether a second QoS Flow other than the first QoS Flow exists;

comparing the service priorities of the first QoS Flow and the second QoS Flow;

In an alternative, the program 1160 may be specifically invoked by the processor 1120 to cause the base station to: the setting requirements include: and the signal receiving power reaches a threshold value when the signal receiving power is not in the blacklist and belongs to the neighbor relation with the source cell.

An embodiment of the present invention provides a computer readable storage medium storing at least one executable instruction that, when executed on a base station, causes the base station to perform a communication handover method in any of the above method embodiments.

The executable instructions may be specifically configured to cause a base station to:

In an alternative, the executable instructions cause the base station to:

detecting whether a second QoS Flow other than the first QoS Flow exists;

In an alternative, the executable instructions cause the base station to:

comparing the service priorities of the first QoS Flow and the second QoS Flow;

In an alternative, the executable instructions cause the base station to:

The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general-purpose systems may also be used with the teachings herein. The required structure for a construction of such a system is apparent from the description above. In addition, embodiments of the present invention are not directed to any particular programming language. It will be appreciated that the teachings of the present invention described herein may be implemented in a variety of programming languages, and the above description of specific languages is provided for disclosure of enablement and best mode of the present invention.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the above description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim.

Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component, and they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specifically stated.

Claims

1. A method of handover, applied to a base station, the method comprising:

receiving first information sent by an access and mobility management function (AMF) network element, wherein the first information is used for indicating to establish the latest first service quality of service (QoS) Flow;

2. The method of claim 1, wherein the generating a target cell list based on the periodic measurement reports if the quality of service in the consecutive M periods is greater than a threshold value based on the N periodic measurement reports, the method further comprises:

3. The method of claim 1, wherein the determining a periodic on-channel measurement configuration based on the first QoS Flow comprises:

detecting whether a second QoS Flow other than the first QoS Flow exists;

4. The method of claim 3, wherein the determining the periodic on-channel measurement configuration based on traffic priorities of the first QoS Flow and the second QoS Flow comprises:

comparing the service priorities of the first QoS Flow and the second QoS Flow;

5. The method according to any one of claims 1 to 4, wherein the setting requirements comprises: and the signal receiving power reaches a threshold value when the signal receiving power is not in the blacklist and belongs to the neighbor relation with the source cell.

6. The method according to claim 1, further comprising, after said selecting a target cell from said target cell list that meets a set requirement and sending a same frequency handover request to said target cell:

receiving second information sent by an AMF network element, wherein the second information is used for indicating to release the first QoS Flow;

7. A communication switching apparatus, for use in a base station, comprising:

8. The apparatus of claim 1, wherein the apparatus further comprises:

9. A base station comprising an antenna, a memory, one or more processors, and a communication interface;

the antenna is used for receiving and transmitting information;

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the operations of the communication handover method of any one of claims 1-6.

10. A computer readable storage medium, wherein at least one executable instruction is stored in the storage medium, which when run on a base station causes the base station to perform the operations of the communication handover method according to any one of claims 1-6.