CN116916399A

CN116916399A - Wireless access network system, communication method, device, storage medium and electronic equipment

Info

Publication number: CN116916399A
Application number: CN202310871233.8A
Authority: CN
Inventors: 宗佳颖; 刘洋; 黄璇; 陈鹏
Original assignee: China Telecom Technology Innovation Center; China Telecom Corp Ltd
Current assignee: China Telecom Technology Innovation Center; China Telecom Corp Ltd
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2023-10-20

Abstract

The disclosure provides a wireless access network system, a communication method, a communication device, a storage medium and electronic equipment, and relates to the technical field of wireless communication. The communication method comprises the following steps: receiving a switching request sent by a source base station, and judging whether the user equipment is allowed to switch access or not based on the switching request; if the user equipment is allowed to be switched in, the mobility management function entity of the target base station sends a confirmation switching instruction to the source base station so as to enable the user equipment to reconfigure the radio resource control information according to the confirmation switching instruction; the mobility management function entity of the target base station responds to the radio resource control information reconfiguration completion instruction, the mobility management function entity executes a path switching request, and the data transmission paths of the user terminal and the source base station are switched into the data transmission paths of the user terminal and the target base station based on the path switching request. The method and the device can realize flexible on-demand deployment of network functions, high efficiency of a cross-base station switching process and improvement of data transmission efficiency.

Description

Wireless access network system, communication method, device, storage medium and electronic equipment

Technical Field

The present disclosure relates to the field of wireless communication technologies, and in particular, to a wireless access network system, a communication method, a communication device, a storage medium, and an electronic apparatus.

Background

In the existing radio access network (Radio Access Network, RAN) architecture, the third generation partnership project (3rd Generation Partnership Project,3GPP) specifies a handover control procedure of User Equipment (UE) across base stations based on an Xn interface shown in fig. 1, where the Xn interface is an interconnection interface between base stations.

However, in the above related technical solutions, on one hand, the RAN architecture is relatively bulky, stiff and closed, and cannot implement flexible on-demand deployment of network functions and efficient processing of the handover control procedure across base stations. On the other hand, the interaction process in the cross-base station switching control flow of the Xn interface is based on protocols such as XnAP, SCTP and the like, so that the SCTP link establishment is required to be carried out again when the link fails, the recovery time is long, and the data transmission efficiency is low.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The disclosure aims to provide a wireless access network system, a communication method, a communication device, a storage medium and an electronic device, so as to overcome the technical problems of incapability of realizing flexible on-demand deployment of network functions, cross-base station switching control flow processing and lower data transmission efficiency caused by the limitations and defects of related technologies at least to a certain extent.

According to a first aspect of the present disclosure, there is provided a communication method applied to a target base station, the target base station including a mobility management function entity, a radio resource management and scheduling function entity, the method including: the wireless resource management and scheduling functional entity of the target base station receives a switching request aiming at the user equipment and sent by the source base station, and judges whether the user equipment is allowed to be switched to access or not based on the switching request; if the user equipment is allowed to be switched in, the mobility management function entity of the target base station sends a confirmation switching instruction to the source base station so as to enable the user equipment to reconfigure the radio resource control information according to the confirmation switching instruction; the mobility management function entity of the target base station responds to the radio resource control information reconfiguration completion instruction, the mobility management function entity executes a path switching request, and the data transmission paths of the user terminal and the source base station are switched into the data transmission paths of the user terminal and the target base station based on the path switching request.

Optionally, the target base station further includes a radio bearer management function entity, and before the step of sending the confirmation handover instruction to the source base station by the mobility management function entity of the target base station, the method further includes: and constructing user plane bearing context information between the mobility management function entity and the radio bearing management function entity in the target base station.

Optionally, after the step of allowing the target user terminal to perform handover, the target base station establishes a network connection with the wireless connection security network entity and generates the security key.

Optionally, the determining whether to allow the user equipment to perform handover based on the handover request includes: acquiring resource occupation information of a plurality of candidate areas; and judging whether the user equipment is allowed to be switched or not based on the switching request and the resource occupation information of the candidate areas.

Optionally, after the step of executing the path switching request to trigger the downlink transmission path to be switched from the source base station to the target base station based on the path switching request, the method further includes: transmitting a protocol data unit session update request to the wireless session management functional entity so as to perform protocol data unit session update operation at the user plane functional entity; and receiving updated protocol data unit session information in response to the protocol data unit session update operation completion instruction.

According to a second aspect of the present disclosure, there is provided a radio access network system comprising a user terminal, a source base station, a target base station.

The user equipment is used for triggering a switching request to the source base station, reconfiguring the radio resource control information based on the indication information sent by the source base station, and sending a radio resource control information updating completion instruction to the target base station; the source base station is deployed in the edge node and is used for sending a switching request for the user equipment to the target base station and receiving a confirmation switching instruction from the target base station so as to generate indication information for reconfiguring the radio resource control information for the user equipment; the target base station is deployed in the edge node and at least comprises a mobility management functional entity and a radio resource management and scheduling functional entity; the radio resource management and scheduling functional entity is used for receiving a switching request sent by the source base station and aiming at the user equipment, judging whether the user equipment is allowed to carry out switching access or not based on the switching request, if the user equipment is allowed to switch, the mobility management functional entity based on the target base station sends a switching confirmation instruction to the source base station, the mobility management functional entity of the target base station responds to the radio resource control information reconfiguration completion instruction, executes the path switching request, and switches the data transmission paths of the user terminal and the source base station into the data transmission paths of the user terminal and the target base station based on the path switching request.

Optionally, the radio access network system may further include an edge function entity disposed in the edge node and at least including a radio connection security function entity, a radio session management function entity, and a user plane function entity; the wireless connection safety function entity is used for establishing wireless connection with the source base station and the target base station and generating a safety key; the wireless session management functional entity is used for receiving a protocol data unit session update request sent by the target base station and sending updated protocol data unit session information to the target base station; and the user plane functional entity is used for receiving the protocol data unit session modification request sent by the wireless session management functional entity and executing the protocol data unit session updating operation based on the protocol data unit session modification request.

According to a third aspect of the present disclosure, there is provided a communication apparatus applied to a target base station, the apparatus comprising: the admission judgment module is configured to receive a switching request for the user equipment sent by the source base station by a radio resource management and scheduling functional entity of the target base station, and judge whether the user equipment is allowed to switch access or not based on the switching request; the instruction sending module is configured to send a confirmation switching instruction to the source base station by the mobility management function entity of the target base station if the user equipment is allowed to be switched in, so that the user equipment can reconfigure the radio resource control information according to the confirmation switching instruction; and the path switching module is configured to enable the mobility management functional entity of the target base station to respond to the radio resource control information reconfiguration completion instruction, execute a path switching request by the mobility management functional entity and switch the data transmission paths of the user terminal and the source base station into the data transmission paths of the user terminal and the target base station based on the path switching request.

Optionally, the communication device may further include an information construction module configured to construct user plane bearer context information between the mobility management function entity and the radio bearer management function entity in the target base station.

Optionally, the communication device may further comprise a key generation module configured to establish a network connection with the wireless connection secure network entity and to generate the secure key.

Optionally, the admission judgment module is configured to acquire resource occupation information of a plurality of candidate areas; and judging whether the user equipment is allowed to be switched or not based on the switching request and the resource occupation information of the candidate areas.

Optionally, the instruction sending module is configured to send a protocol data unit session update request to the wireless session management functional entity so as to perform a protocol data unit session update operation at the user plane functional entity; and receiving updated protocol data unit session information in response to the protocol data unit session update operation completion instruction.

According to a fourth aspect of the present disclosure, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, implements any of the above-described communication methods.

According to a fifth aspect of the present disclosure, there is provided an electronic device comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform any of the communication methods described above via execution of the executable instructions.

In some embodiments of the present disclosure, a radio resource management and scheduling function entity of a target base station receives a handover request for a user equipment sent by a source base station, and determines whether to allow the user equipment to switch access based on the handover request; if the user equipment is allowed to be switched in, the mobility management function entity of the target base station sends a confirmation switching instruction to the source base station so as to enable the user equipment to reconfigure the radio resource control information according to the confirmation switching instruction; and the mobility management functional entity of the target base station responds to the radio resource control information reconfiguration completion instruction, executes a path switching request and switches the data transmission paths of the user terminal and the source base station into the data transmission paths of the user terminal and the target base station based on the path switching request.

On one hand, the method integrates and deploys the RAN function and the core network function into the base station, deploys the base station into the edge node, and compared with the interaction process of the RAN function of the internal node of the data center and the core network function of the edge node in the related technical scheme, the data transmission delay is smaller. Based on different application scenes, the fused RAN function and core network function can be flexibly deployed, so that the flexibility of the RAN architecture is improved. On the other hand, the RAN function and the core network function after fusion enable the data transmission paths of the source base station and the target base station to be switched, and the data transmission efficiency to be improved can be achieved based on the service interface in the target base station. Meanwhile, the SCTP link establishment can be quickly recovered when faults occur in the interaction process, the technical problem that the data transmission efficiency is low due to the fact that SCTP link establishment needs to be carried out again when the links are in fault in the related technology is solved, the data transmission efficiency is improved, and the technical effect of improving the signaling interaction efficiency in the cross-base station switching process is achieved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort. In the drawings:

fig. 1 schematically illustrates an architecture diagram of a RAN system according to an exemplary embodiment of the present disclosure;

fig. 2 schematically illustrates a flow diagram of a method for cross-base station handover based on an Xn interface, according to an exemplary embodiment of the present disclosure;

fig. 3 schematically illustrates an architecture diagram of a service-based radio access network system according to an exemplary embodiment of the present disclosure;

fig. 4 schematically illustrates an architecture diagram of another RAN system according to an exemplary embodiment of the present disclosure;

fig. 5 schematically illustrates a flowchart of a communication method applied to a source base station according to an exemplary embodiment of the present disclosure;

FIG. 6 schematically illustrates an overall communication method schematic according to an exemplary embodiment of the present disclosure;

fig. 7 schematically illustrates a schematic diagram of a communication device according to an exemplary embodiment of the present disclosure; and

fig. 8 schematically illustrates a block diagram of an electronic device according to an exemplary embodiment of the present disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will recognize that the aspects of the present disclosure may be practiced with one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software or in one or more hardware modules or integrated circuits or in different networks and/or processor devices and/or microcontroller devices.

The flow diagrams depicted in the figures are exemplary only and not necessarily all steps are included. For example, some steps may be decomposed, and some steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.

In order to explain the scheme of handover based on the Xn interface in the current mobile communication network, the following will exemplarily describe related technical schemes with reference to fig. 1 and 2.

Fig. 1 schematically illustrates an architecture diagram of a RAN system according to an exemplary embodiment of the present disclosure. As shown in fig. 1, the system includes a UE, a source base station, a target base station, and a core network element. The source base station and the target base station may be base stations in the 5G wireless network and may be referred to as a gNB, so that in the 5G wireless network, the source base station may be referred to as a source gNB and the target base station may be referred to as a target gNB.

The core network element comprises: an access and mobility management function (Authentication Management Field, AMF), a session management function entity (Session Management Function, SMF), and a user plane function entity (User Plane Function, UPF). The source gNB and the target gNB are respectively split into a central Unit gNB-CU (CU) and a Distributed Unit gNB-DU (DU), and connection is realized through an F1 interface, and the gNB-CU can be separated into a CU-CP and a CU-UP, so that separation of a control plane and a user plane is realized.

In addition, the 5G base station system gNB may be composed of one CU-CP (control plane of CU), a plurality of CU-UP (user plane of CU), and a plurality of DUs. The gNB-CU-CP and the gNB-DU are connected through F1-C, the gNB-CU-UP and the gNB-DU are connected through F1-U, and the gNB-CU-CP and the gNB-CU-UP are connected through E1 interfaces. Meanwhile, one DU can be connected with only one CU-CP, one CU-UP can be connected with only one CU-CP, and one DU can be connected with a plurality of CU-UPs (a plurality of CU-UPs under the control of the same CU-CP).

As can be seen from the system architecture shown in fig. 1, the UE is connected to a Core Network (CN) through a RAN, where the CN sinks to the edge of the Network data exchange, commonly referred to as the edge side. It should be understood that in the system architecture shown in fig. 1, the number of UEs, source base stations, target base stations, and core network elements is merely exemplary, and that a greater or lesser number is within the scope of the present disclosure. Also, in the example operational scenario described above, the UE may be, for example, a personal computer, a mobile phone, a server, a palmtop (Personal Digital Assistant, PDA), a notebook, or any other computing device with networking functionality. The networks for communication between the UE, the source base station, the target base station, and the core network elements may include various types of wired and wireless networks such as, but not limited to: internet, local area network, wireless fidelity (Wireless Fidelity, WIFI), wireless local area network (Wireless Local Area Networks, WLAN), cellular communication network (general packet radio service technology (General Packet Radio Service, GPRS), code division multiple access (Code Division Multiple Access, CDMA), 2G/3G/4G/5G cellular network), satellite communication network, and the like.

Accordingly, based on the system architecture shown in fig. 1, a flow of implementing the handover between gnbs based on the Xn interface will be exemplarily described with reference to fig. 2. Fig. 2 schematically shows a flow diagram of a method for handover across base stations based on an Xn interface, according to an exemplary embodiment of the present disclosure.

In the related technical solutions shown in fig. 1 and 2, the following technical problems exist:

A. the existing RAN architecture is relatively bulky, stiff and closed, and cannot implement flexible on-demand deployment of network functions.

B. In the Xn handover interaction signaling process shown in fig. 2, protocols such as an Xn interface application flow protocol (Xn Application Protocol, xnAP), stream control transmission protocol (Stream Control Transmission Protocol, SCTP) and the like (SCTP protocol can ensure reliable transmission of signaling messages) are more complex, for example, interaction is performed between a source gNB and a target gNB based on the Xn interface XnAP protocol, and interaction is performed between the target base station and a core network element on the edge side through the SCTP protocol. And when the link fails, the SCTP needs to be reestablished, the recovery time is longer, and the signaling interaction process and the data transmission efficiency are lower.

C. In the prior art, the core network element sinks to the edge side, so that the interaction process of the base station and the core network element on the edge side in the signaling interaction process makes the signaling interaction process complex, resulting in low data transmission efficiency.

In view of the foregoing, exemplary embodiments of the present disclosure provide a radio access network system design scheme based on servitization. Fig. 3 schematically illustrates an architecture diagram of a service-based radio access network system according to an exemplary embodiment of the present disclosure, as shown in fig. 3, the service-based radio access network system includes: control plane functional entity and user plane functional entity configured in the center cloud, and RAN control plane configured at the edge side. As can be seen from the above, the radio access network system based on service provided by the present disclosure realizes the integration of RAN functions and CN functions, so that the signaling interaction process interacts in the base station through the service interface, improving the data transmission efficiency and ensuring the high efficiency of the signaling interaction process. And the method can also quickly recover when the link fails, so that the waiting time is reduced, and the high efficiency of the signaling interaction flow is further ensured.

And the RAN control surface adopts a service architecture, and the RAN network functions are mainly divided into the following two stages: the first-level functional entity comprises five functions: the system comprises a connection function, a data function, an intelligent function, a calculation function and a service management function, wherein each first-level functional entity can be subdivided into a plurality of second-level functional entities. The first-level functional entity and the second-level functional entity can be directly connected to the bus, and service call with different granularities can be carried out according to the needs in the interaction process, so that the technical problem that the flexible on-demand deployment of network functions cannot be realized due to relative rigidification and sealing of a wireless network architecture in the related art is solved, and the flexibility of system functions is improved.

In order to facilitate understanding of the service-based radio access network system provided by the present disclosure by those skilled in the art, the following will specifically describe the first-stage functional entity and the second-stage functional entity:

a) The connection function is the basis of the network for providing wireless connection service, and the second-level functional entity mainly comprises functional entities such as wireless connection control, wireless bearer management, mobility management, wireless resource management scheduling, wireless connection security and the like.

The wireless connection control is mainly responsible for maintaining the state of a user, guaranteeing and processing the connection between the user and the wireless access network, and realizing the control functions of paging, initial access, connection reestablishment, release, resynchronization and the like. The radio bearer management is mainly responsible for operations such as establishment, modification, release and the like of signaling radio bearers and data radio bearers, and performs control processing on configuration, modification release and the like of bearer contexts. Mobility management supports mobility in different user states including measurement configuration, location management (e.g., RAN notification area update), handover control scheme handling based on different scenarios, mobility restrictions, etc. And the wireless resource management and scheduling support interference management, power control, dynamic flow direction and the like, and dynamically allocate uplink and downlink resources of the terminal, schedule signaling messages and the like. The wireless connection security is responsible for air interface security policies, such as encryption and decryption, integrity protection, etc., and supports the end-to-end security service of subsequent evolution.

b) The data function is mainly used for controlling user service data and comprises functional entities such as wireless capability opening, wireless data storage, wireless session resource management, data programming and the like.

The wireless capability opening function provides a channel for safely opening RAN data or capability to third party applications and developers, and enables diversified services, such as real-time monitoring management of network performance data, perception service, position subscription and the like. The wireless data storage is responsible for storing related data of a network and a terminal, so that the wireless data is decoupled from a network control function, thereby realizing data state maintenance and supporting dynamic expansion and contraction of the network function under the condition that service is not interrupted. The wireless session resource management is mainly responsible for PDU session management, including configuration, modification, release, etc. of PDU session resources, and performs cooperative interaction with the core network session management function. The data programmable support data processing method is open to the outside, and the required data and the data processing mode are customized according to the requirement.

c) The intelligent function is the embodiment of the intelligent plane on the control plane of the wireless access network, and can comprise functional entities such as wireless AI data training and reasoning decision, wireless AI data collection and preprocessing, and the like, and interacts with other functions of the intelligent plane.

The wireless AI data collection and preprocessing is responsible for providing data collection and preprocessing services (such as data cleaning and data conversion) according to different use case requirements. The wireless AI data trains the inference decisions, responsible for providing training inference services for the intelligent needs under different use cases (e.g., RAN slices).

d) The computing function mainly comprises cloud capability providing, is responsible for abstracting computing resources, storage resources, network resources and the like, and provides cloud capability for other network functions.

e) The service management function is responsible for network function management of the service architecture, including wireless service management, network programming, etc. The wireless service management provides service registration and cancellation, service discovery, inter-service communication, authentication verification, load management and the like. The network programmable is responsible for dynamically adjusting the new addition, update and deletion of the network functions so as to adapt to diversified scenes and business requirements.

The radio access network system based on service shown in fig. 3 realizes the integration of RAN functions and CN functions, so that the core network functions to be integrated can be determined in combination with actual requirements. Taking a scenario of high mobility, requiring data local processing and the like as an example, the embodiments of the present disclosure will describe the following integration of CN functions with RAN functions:

(1) The mobility management function entity (in the 5G core network, the mobility management function entity is the AMF function) sinks and merges with the RAN side corresponding function.

(2) The session management function (a function belonging to SMF in 5 GC) is converged with the RAN-side corresponding function.

(3) The user plane functions (corresponding to UPF in 5 GC) sink and merge.

It should be noted that, in the following embodiments, the following embodiments are all illustrated by taking a scenario with high mobility, requiring data local processing, etc. as an example, actual requirements corresponding to different application scenarios are different, and the functional types of the core network elements correspondingly selected for sinking are different, which can be specifically determined according to implementation requirements, and the embodiments of the present disclosure do not make any special limitation on the same.

A RAN system in an application scenario constructed based on the service-based RAN system shown in fig. 3 provided in the present disclosure will be described in detail with reference to fig. 4.

As shown in fig. 4, the RAN system 400 includes a UE401, a source base station 402, and a target base station 403. The source base station 402 and the target base station 403 are deployed in an edge node of the server, and meanwhile, the functional entities deployed in the source base station 402 and the target base station 403 are the same and sink the CN function and fuse with the RAN function. It should be noted that, the functional entities deployed in the source base station 402 and the target base station 403 may be adjusted according to actual application scenarios, for example, the source base station 402 and the target base station 403 shown in fig. 4 each include the mobility management functional entity, the radio resource management and call functional entity, and the radio bearer management functional entity in fig. 3, which are flexibly deployed based on the scenarios of high mobility, requiring local data processing, and the like. Meanwhile, other edge function entities 404 are disposed in the edge node, and the function entities included in the edge function entities 404 can be flexibly adjusted according to actual scene requirements, for example, for a high mobility, data local processing requirement, and other types of scenes, the edge function entities 404 can include a wireless connection security function entity, a wireless session management function entity, and a user plane function entity shown in fig. 4, where the edge function entity 404 is not subordinate to any base station.

For example, in some example embodiments of the present disclosure, the target base station 403 includes a mobility management function entity and a radio resource management and scheduling function entity, and the target base station 403 receives a handover request for the UE401 sent by the source base station 402 through the radio resource management and scheduling function entity, and makes a determination on whether to allow the UE401 to perform handover access based on the handover request; if the UE401 is allowed to switch, sending a confirmation switching instruction to the source base station 402 through the mobility management function entity, so that the UE401 performs radio resource control (Radio Resource Control, RRC) information reconfiguration according to the confirmation switching instruction; the target base station 403 performs a path switching request in response to the RRC information reconfiguration complete instruction via the mobility management function entity, and switches the data transmission paths of the user terminal 401 and the source base station 402 to the data transmission paths of the user terminal 401 and the target base station 403 based on the path switching request.

It should be understood that in the system architecture shown in fig. 4, the number of UE401, source base station 402, target base station 403, and edge function entities is merely exemplary, and that a greater or lesser number is within the scope of the present disclosure. Also, in the example operational scenario described above, the UE may be, for example, a personal computer, a server, a palm top (Personal Digital Assistant, PDA), a notebook, or any other computing device with networking capabilities. The networks for communication between UE401, source base station 402, target base station 403, and edge function entities may include various types of wired and wireless networks such as, but not limited to: internet, local area network, wireless fidelity (Wireless Fidelity, WIFI), wireless local area network (Wireless Local Area Networks, WLAN), cellular communication network (general packet radio service technology (General Packet Radio Service, GPRS), code division multiple access (Code Division Multiple Access, CDMA), 2G/3G/4G/5G cellular network), satellite communication network, and the like.

With the system architecture of the present disclosure known, the scheme of the communication method provided by the present disclosure will be described in detail with reference to fig. 5 and 6.

Fig. 5 is a flowchart of a communication method applied to a source base station according to an embodiment of the present disclosure, where the method may be performed by any device that performs the communication method, and the device may be implemented by using software and/or hardware. In this embodiment, the apparatus may be integrated in the target base station 403 as shown in fig. 4, and the target base station 403 includes a mobility management function entity, a radio resource management and scheduling function entity. As shown in fig. 5, the communication method provided by the embodiment of the present disclosure may include the following steps S501 to S503:

step S501, the radio resource management and scheduling functional entity of the target base station receives a handover request for the ue sent by the source base station, and determines whether to allow the ue to switch access based on the handover request.

Step S502, if the user equipment is allowed to switch access, the mobility management function entity of the target base station sends a confirmation switching instruction to the source base station, so that the user equipment can reconfigure the radio resource control information according to the confirmation switching instruction.

In step S503, the mobility management function entity of the target base station executes a path switching request in response to the radio resource control information reconfiguration complete instruction, and switches the data transmission paths of the user terminal and the source base station to the data transmission paths of the user terminal and the target base station based on the path switching request.

In some embodiments of the present disclosure, a radio resource management and scheduling function entity of a target base station receives a handover request for user equipment sent by a source base station, and determines whether to allow the user equipment to switch access based on the handover request; if the user equipment is allowed to be switched in, the mobility management function entity of the target base station sends a confirmation switching instruction to the source base station so as to enable the user equipment to reconfigure the radio resource control information according to the confirmation switching instruction; and the mobility management functional entity of the target base station responds to the radio resource control information reconfiguration completion instruction, executes a path switching request and switches the data transmission paths of the user terminal and the source base station into the data transmission paths of the user terminal and the target base station based on the path switching request.

Embodiments corresponding to the steps in the communication method shown in fig. 5 will be described below with reference to specific embodiments.

In step S501, the radio resource management and scheduling function entity of the target base station receives a handover request for the ue sent by the source base station, and determines whether to allow handover access of the ue based on the handover request.

In some example embodiments of the present disclosure, before performing step S501, when the UE performs a handover across base stations, a measurement report is transmitted to the source base station, so that the source base station determines whether to perform handover for the UE according to the measurement report and the resource management information.

The measurement report includes signal strength of the serving cell and neighbor cells where the UE is currently located, physical cell identifier (Physical Cell Identifier, PCI) information, and the like. The acknowledgement Signal strength may be measured on parameters such as a Single Side Band (SSB) of the network, a channel state information Reference Signal (CSI-RS), and the like, to obtain a measurement result. The measurement results are determined by measurement indexes such as reference signal received power (Reference Signal Receiving Power, RSRP), reference signal received quality (Reference Signal Receiving Quality, RSRQ), signal-to-interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR), and the like.

It should be noted that the measurement report may be based on a beam level or based on a serving cell level, which is not limited in any way by the embodiments of the present disclosure. For example, if the UE is handed over as a result of the determination, the source base station needs to determine a target cell in the target base station from the multiple candidate areas, and then send a handover request for the UE to the target base station. In general, a base station may be responsible for multiple serving cells, e.g., the source base station is responsible for serving cell 1, serving cell 2, and the target base station is responsible for serving cell 3, serving cell 4 in fig. 4. When the user moves from the serving cell 2 to the serving cell 3 with the UE, the UE is triggered to send a measurement report to the source base station for handover between the base stations.

In an exemplary embodiment, a mobility management function entity, a radio resource management and call function entity, and a radio bearer management function entity are deployed in a source base station, and when a UE sends a measurement report to the source base station, the UE sends the measurement report to the radio resource management and call function entity in the source base station, so that the radio resource management and call function entity makes a decision about whether to switch the UE according to the measurement report and the resource management information. And if the decision result is that the handover is allowed, determining a target base station or a target serving cell based on the resource management information of each base station.

The wireless resource management and calling functional entity sends a switching instruction to the mobility management functional entity in the source base station, and indicates information such as a target base station to be switched, a target service cell, a switching type and the like, so that the mobility management functional entity of the source base station sends a switching request to a corresponding target base station.

The handover request carries a target cell identifier (Identity document, ID), a protocol data unit (Protocol Data Unit, PDU) session list, UE security capability, AS security information, handover preparation information, and other contexts, so AS to request the target cell to prepare for handover resources.

After the radio resource management and calling functional entity sends a switching instruction to the mobility management functional entity in the source base station, the mobility management functional entity and the radio connection security functional entity interact signaling to generate a security key, wherein the security key comprises an encryption key, a security key and the like, so that the security of data transmission is improved.

In an optional embodiment of the present disclosure, when step S501 is executed to determine whether to allow the user equipment to perform handover access based on the handover request, resource occupation information of a plurality of candidate areas is obtained; and judging whether the user equipment is allowed to be switched or not based on the switching request and the resource occupation information of the candidate areas.

The candidate area is the serving cell for which the target base station is responsible.

For example, after receiving a handover request sent by a source base station, a target base station needs to determine whether to allow a user equipment to perform handover access. The judgment can be performed according to the radio resource occupation condition of each serving cell in the target base station.

And if the radio resource occupancy rate of each service cell in the target base station is high, indicating that the current load capacity of each cell is large, rejecting the access of the user equipment. Otherwise, if the radio resource occupancy rate of each serving cell in the target base station is low, the user equipment is allowed to access.

In an alternative embodiment of the present disclosure, a candidate region with the least occupation of resources among a plurality of candidate regions is determined as a target region; and sending the identification information of the target area to the source base station.

By comparing the resource occupation situations of the service cells, the UE is accessed to the service cells with more idle resources, i.e. the cell with the lowest resource occupation rate can be determined as the target cell, so that the UE accesses the target cell.

The target base station can judge whether to allow access or not by analyzing the resource occupation condition of each service cell, and can also rapidly determine the target cell to which the user equipment can transfer by comparing the resource occupation condition of each service cell, thereby improving the switching control efficiency while improving the resource utilization rate.

In step S502, if the ue is allowed to switch to access, the mobility management function entity of the target base station sends a confirmation switching instruction to the source base station, so as to reconfigure the radio resource control information according to the confirmation switching instruction.

The target base station performs admission control according to the switching request and the resource occupation condition, and the admission control allows the UE to be switched from the source base station to enter the judgment of the target base station. And if the user equipment is allowed to be switched, sending a switching confirmation instruction to the source base station, otherwise, if the user equipment is not allowed to be switched, sending a switching rejection instruction to the source base station.

The source base station and the target base station include mobility management function entities, radio resource management and scheduling function entities, and radio bearer management function entities, for example.

The radio resource management and scheduling functional entity of the target base station receives the handover request sent by the source base station, performs admission control according to the handover request and the resource occupation condition, allocates UE instances and transmission resources if handover is allowed, and sends a handover admission command to the mobility management functional entity of the target base station.

In an alternative embodiment of the present disclosure, after the mobility management function entity of the target base station receives the handover admission command, user plane bearer context information between the mobility management function entity and the radio bearer management function entity is constructed in the target base station.

For example, user plane bearing context information between the mobility management function entity and the radio bearer management function entity is constructed in the target base station, so that the mobility management function entity of the source base station sends SN status transmission information to the mobility management function entity of the target base station, and then the user plane bearing context information is modified.

In an alternative embodiment of the present disclosure, if the user equipment is not allowed to switch, feedback information is sent to the source base station, and the mobility management function entity of the source base station re-determines the target base station/target cell.

In an alternative embodiment of the present disclosure, after the target base station allows the user equipment to switch, the target base station establishes a network connection with the wireless connection security network entity and generates the security key.

The wireless connection security network entity is deployed at the edge node and is independent of any base station, and the security keys comprise an encryption key, a full protection key and the like.

The privacy and security of data transmission can be improved by establishing a network connection with a wireless connection security network entity to generate a security key.

The data transmission path may include an uplink transmission path and a downlink transmission path, where the uplink transmission path may be a path for transmitting data from the user terminal to the target base station, and the downlink transmission path is a path for transmitting data from the target base station to the user device.

In an optional embodiment of the disclosure, after triggering a downlink transmission path to be switched from a source base station to a target base station based on a path switching request, the target base station sends a protocol data unit session update request to a wireless session management functional entity so as to perform a protocol data unit session update operation at a user plane functional entity; and receiving updated protocol data unit session information in response to the protocol data unit session update operation completion instruction.

The wireless session management functional entity is independent of the base station, and is deployed in the edge node together with the wireless connection safety functional entity, the source base station and the target base station. The wireless session resource management is mainly responsible for PDU session management, including configuration, modification, release, etc. of PDU session resources, and performs cooperative interaction with the core network session management function SMF.

For example, after determining the uplink and downlink transmission paths of data transmission between the UE and the target base station, the PDU session information between the UE and the source base station needs to be updated in time to the PDU session information between the UE and the target base station.

The PDU session information update procedure is as follows:

a mobility management function entity in the target base station sends a PDU session update request to a wireless session management function entity to indicate that a PDU session is to be switched; the wireless session management functional entity sends a session modification request to the user plane functional entity to perform session modification, for example, the wireless session management functional entity notifies the user plane functional entity sending a data notification to discard downlink data of the PDU session, and requests the user plane functional entity to allocate new tunnel information, etc.

And simultaneously, after the user plane functional entity session modification is completed, feedback information is sent to the wireless session management functional entity, and the PDU session information after switching is sent to the target base station only by the wireless session management functional entity. The process can realize synchronous information switching and improve the reliability of data transmission.

The entire communication process of one communication method according to an exemplary embodiment of the present disclosure will be described in detail with reference to fig. 6.

It should be noted that although the steps of the methods in the present disclosure are depicted in the accompanying drawings in a particular order, this does not require or imply that the steps must be performed in that particular order, or that all illustrated steps be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.

Assume that taking the RAN system shown in fig. 4 as an example, the source base station is responsible for cells 1 and 2, the target base station is responsible for cells 3 and 4, and when the user moves from cell 2 to cell 3 with the user equipment UE, the inter-cell handover procedure is triggered. The source base station comprises a first mobility management function entity, a first radio resource management and call function entity and a first radio bearer management function entity; the target base station comprises a second mobility management function entity, a second radio resource management and call function entity and a second radio bearer management function entity.

First, in step S601, a measurement report is transmitted.

Illustratively, the UE reports the measurement report to the first radio resource management schedule of the source base station.

For example, the measurement report may be based on a beam level or a cell level, where the measurement report includes signal strength and PCI information of a serving cell and a neighboring serving cell where the UE is currently located, and measures SSB or CSI-RS parameters to obtain a measurement result. The measurement results are determined by measurement indexes such as reference signal received power (Reference Signal Receiving Power, RSRP), reference signal received quality (Reference Signal Receiving Quality, RSRQ), signal-to-interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR) and the like.

Step S602, determining a handover decision result.

I.e. the source base station decides whether the UE is handed over or not according to the measurement result and the resource management information. The resource management information is, for example, cell load and terminal mobility restrictions and radio capabilities, etc.

When executing step S602, the first radio resource management scheduling function determines a handover decision result according to the measurement result. I.e. the first radio resource management scheduling function decides whether the UE is handed over or not according to the measurement result and the resource management information.

When determining to switch for the UE, executing step S6020, and transmitting a switch command; that is, when the handover decision result is that it is determined to handover the UE, the first radio resource management scheduling function entity sends a handover command to the first mobility management function entity to indicate a target base station (target cell) to be handed over, a handover type, and the like. And otherwise, when the fact that the switching is not carried out for the UE is determined, feedback information is sent to the UE.

In some example embodiments of the present disclosure, the first mobility management function performs step S603 after receiving the handover command, and generates a security key.

Illustratively, the first mobility management function interacts with the wireless connection security function to generate a security key comprising an encryption key, a full security key, and the like. The wireless connection security function entity is located inside the edge node.

Further, step S604 is performed to transmit a handover request. I.e. the source base station sends a handover request for the UE to the target base station.

Illustratively, the first mobility management function of the source base station initiates a handover request to a second radio resource management and scheduling function where the selected target cell (target base station) is located. The handover request carries the UE security capability, AS security information, PDU session resources to be configured, handover preparation information, and other contexts, so AS to request the target base station to prepare for handover resources.

After receiving the handover request, the target base station performs step S605 to determine whether or not to allow the handover.

The second radio resource management and scheduling functional entity in the target base station performs admission control according to the handover request and the resource occupation condition, so as to allow the UE instance and the transmission resource to be allocated after admission.

If the target base station allows the UE to enter, the second radio resource management and scheduling functional entity in the target base station performs step S6050 to the second mobility management functional entity, sends a handover admission command, and after receiving the handover admission command, the second mobility management functional entity performs step S606 to generate a security key. I.e. the second mobility management function interacts with the wireless connection security function to generate security keys including encryption keys, integrity keys, etc.

Then, the second mobility management function entity in the target base station interacts signaling with the second radio bearer management function entity, so as to ensure that the user plane completes the bearer context establishment procedure of step S607. Meanwhile, the second mobility management function entity performs step S608 to the first mobility management function entity, and sends a handover confirm message. I.e. the target base station informs the source base station of the prepared resources and sends the information required by the subsequent air interface to issue the UE handover command.

The first mobility management function in the source base station performs step S609 to the UE, and sends a radio resource control (Radio Resource Control, RRC) reconfiguration message, which contains necessary information for accessing to the target base station.

The first mobility management function in the source base station performs step S610 to the second mobility management function in the target base station, and sends an SN status (Sequence Number). Transmitting the upstream and downstream PDCP SN (Packet Data Convergence Protocol ) and 6FN (6 yper Frame Number, superframe number) status.

In step S611, the context modification is carried. I.e. the second mobility management function in the target base station receives the SN status, and then interacts with the second radio bearer management function for bearer context modification. Meanwhile, the UE performs step S612 to perform random access. So as to access the target cell corresponding to the target base station.

In addition, the UE performs step S613 to the second mobility management function entity, and transmits a UE access indication message. The information carries RRC reconfiguration complete information to indicate a change in information such as UE connection base station.

The second mobility management function in the target base station internally performs step S614 to perform the path switch request. The second mobility management function triggers a handover of the downlink data path from the source base station to the target base station by internally executing a path handover request.

After that, the second mobility management function entity performs step S615 to the wireless session management function entity deployed in the edge node, and sends a PDU session context update request. So as to indicate that the PDU session is to be switched based on the PDU session context update request.

After receiving the PDU session context update request, the wireless session management function entity executes step S616 to the user plane function entity, and sends a session modification request.

The user plane function entity performs step S617 to the wireless session management function entity, and transmits a session modification response. The session modification response may be, for example, a response to a successful session modification or a failure session modification, so that the wireless session management function entity performs subsequent operations. For example, when a response that the session modification is successful is received, step S616 is performed to the second mobility management function entity, and a PDU session context update response is sent; conversely, when a response to a session modification failure is received, a retransmission mechanism may be triggered.

After step S618, i.e. after the second mobility management function receives the PDU session context update response, step S619 is performed internally to perform the path switch response. In the technical scheme, the second mobility management function entity internally executes path switching response without N2 path switching in the related technical scheme, so that the data transmission efficiency is further improved.

Finally, the second mobility management function entity performs step S620 to the first mobility management function entity, and sends the UE context release message. Thereby notifying the source base station of successful handover so that the source base station releases the related resources occupied by the UE.

Further, in order to implement the above communication method, the present exemplary embodiment further provides a communication apparatus 700, which is applicable to the source base station. Fig. 7 schematically shows a schematic architectural diagram of a communication device.

Fig. 7 schematically illustrates a block diagram of a communication device according to an exemplary embodiment of the present disclosure. Referring to fig. 7, a communication apparatus 700 according to an exemplary embodiment of the present disclosure may include an admission judgment module 701, an instruction transmission module 702, and a path switching module 703, wherein:

an admission judgment module 701, configured as a radio resource management and scheduling functional entity of a target base station, receives a handover request for user equipment sent by a source base station, and makes a judgment whether to allow the user equipment to switch access based on the handover request; an instruction sending module 702, configured to send a confirmation switching instruction to the source base station by the mobility management function entity of the target base station if the user equipment is allowed to switch access, so as to reconfigure the radio resource control information according to the confirmation switching instruction; a path switching module 703 configured to perform a path switching request in response to the radio resource control information reconfiguration complete instruction by the mobility management function entity of the target base station, and switch the data transmission paths of the user terminal and the source base station to the data transmission paths of the user terminal and the target base station based on the path switching request.

In an exemplary embodiment of the present disclosure, the communication apparatus 700 may further comprise an information construction module 704, the information construction module 704 being configured to construct user plane bearer context information between the mobility management function entity and the radio bearer management function entity in the target base station.

In an exemplary embodiment of the present disclosure, the communication apparatus 700 may further comprise a key generation module 705, the key generation module 705 being configured to establish a network connection with a wireless connection secure network entity, generating a secure key.

In an exemplary embodiment of the present disclosure, the admission judgment module 701 is configured to obtain resource occupancy information of a plurality of candidate areas; and judging whether the user equipment is allowed to be switched or not based on the switching request and the resource occupation information of the candidate areas.

In an exemplary embodiment of the present disclosure, the instruction sending module 702 is configured to send a protocol data unit session update request to the wireless session management function entity, so as to perform a protocol data unit session update operation at the user plane function entity; and receiving updated protocol data unit session information in response to the protocol data unit session update operation completion instruction.

The communication device 700 provided in the embodiment of the present disclosure may execute the technical scheme of the communication method in any of the embodiments, and the implementation principle and beneficial effects of the communication method are similar to those of the communication method, and reference may be made to the implementation principle and beneficial effects of the communication method, which are not repeated herein.

In an exemplary embodiment of the present disclosure, a computer-readable storage medium having stored thereon a program product capable of implementing the method described above in the present specification is also provided. In some possible embodiments, the various aspects of the invention may also be implemented in the form of a program product comprising program code for causing a terminal to carry out the steps according to the various exemplary embodiments of the invention as described in the "exemplary methods" section of this specification, when the program product is run on the terminal.

A program product for implementing the above-mentioned method according to an embodiment of the present invention may employ a portable compact disc read only memory (CD-ROM) and include a program code, and may be run on a terminal such as a personal computer. However, the program product of the present invention is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, a random access Memory (Random Access Memory, abbreviated as RAM), a Read-Only Memory (abbreviated as ROM), an erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, abbreviated as EPROM or flash Memory), an optical fiber, a portable compact disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The computer readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, radio Frequency (RF) and the like, or any suitable combination of the foregoing.

Program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a local area network (Local Area Network, abbreviated LAN) or wide area network (Wide Area Network, abbreviated WAN), or may be connected to an external computing device (e.g., connected through the Internet using an Internet service provider).

In an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.

Those skilled in the art will appreciate that the various aspects of the invention may be implemented as a system, method, or program product. Accordingly, aspects of the invention may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.

An electronic device 800 according to such an embodiment of the invention is described below with reference to fig. 8. The electronic device 800 shown in fig. 8 is merely an example and should not be construed as limiting the functionality and scope of use of embodiments of the present invention.

As shown in fig. 8, the electronic device 800 is embodied in the form of a general purpose computing device. Components of electronic device 800 may include, but are not limited to: the at least one processing unit 810, the at least one storage unit 820, a bus 830 connecting the different system components (including the storage unit 820 and the processing unit 810), and a display unit 840.

Wherein the storage unit stores program code that is executable by the processing unit 810 such that the processing unit 810 performs steps according to various exemplary embodiments of the present invention described in the above section of the "exemplary method" of the present specification. For example, the processing unit 810 may perform steps S501 to S503 as shown in fig. 5.

The storage unit 820 may include readable media in the form of volatile storage units, such as Random Access Memory (RAM) 8201 and/or cache memory 8202, and may further include Read Only Memory (ROM) 8203.

Storage unit 820 may also include a program/utility 8204 having a set (at least one) of program modules 8205, such program modules 8205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.

Bus 830 may be one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

The electronic device 800 may also communicate with one or more external devices 1000 (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 800, and/or any device (e.g., router, modem, etc.) that enables the electronic device 800 to communicate with one or more other computing devices. Such communication may occur through an Input/Output (I/O) interface 850. Also, electronic device 800 may communicate with one or more networks such as a local area network, a Wide Area Network (WAN), and/or a public network such as the internet via network adapter 860. As shown, network adapter 860 communicates with other modules of electronic device 800 over bus 830. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 800, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, disk array (Redundant Arrays of Independent Disks, simply RAID) systems, tape drives, data backup storage systems, and the like.

From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

Furthermore, the above-described drawings are only schematic illustrations of processes included in the method according to the exemplary embodiment of the present invention, and are not intended to be limiting. It will be readily appreciated that the processes shown in the above figures do not indicate or limit the temporal order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, among a plurality of modules.

It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A communication method, applied to a target base station, the target base station including a mobility management function entity, a radio resource management and scheduling function entity, the method comprising:

the wireless resource management and scheduling functional entity of the target base station receives a switching request for user equipment sent by a source base station and judges whether the user equipment is allowed to be switched to access or not based on the switching request;

If the user equipment is allowed to be switched in, a mobility management function entity of the target base station sends a confirmation switching instruction to the source base station so as to enable the user equipment to reconfigure radio resource control information according to the confirmation switching instruction;

and the mobility management functional entity of the target base station responds to the radio resource control information reconfiguration completion instruction, executes a path switching request, and switches the data transmission paths of the user terminal and the source base station into the data transmission paths of the user terminal and the target base station based on the path switching request.

2. The communication method according to claim 1, wherein the target base station further comprises a radio bearer management function, the method further comprising, before the sending of the confirm handover instruction to the source base station by the mobility management function of the target base station:

and constructing user plane bearing context information between the mobility management function entity and the radio bearer management function entity in the target base station.

3. The communication method according to claim 1, characterized in that after said allowing the target user terminal to make a handover, the method further comprises:

And the target base station establishes network connection with the wireless connection security network entity and generates a security key.

4. The communication method according to claim 1, wherein the determining whether to allow the user equipment to perform handover based on the handover request includes:

acquiring resource occupation information of a plurality of candidate areas;

and judging whether the user equipment is allowed to perform handover or not based on the handover request and the resource occupation information of the candidate areas.

5. The communication method according to claim 1, wherein after the performing of the path switching request to trigger switching of a downlink transmission path from the source base station to the target base station based on the path switching request, the method further comprises:

transmitting a protocol data unit session update request to the wireless session management functional entity so as to perform protocol data unit session update operation at the user plane functional entity;

and receiving updated protocol data unit session information in response to the protocol data unit session update operation completion instruction.

6. A radio access network system, comprising:

the user equipment is used for triggering a switching request to the source base station, reconfiguring the radio resource control information based on the indication information sent by the source base station, and sending a radio resource control information updating completion instruction to the target base station;

The source base station is deployed in an edge node and is used for sending a switching request aiming at the user equipment to a target base station and receiving a confirmation switching instruction from the target base station so as to generate indication information for reconfiguring radio resource control information aiming at the user equipment;

the target base station is deployed in the edge node and at least comprises a mobility management functional entity and a radio resource management and scheduling functional entity; the radio resource management and scheduling functional entity is configured to receive a handover request sent by the source base station for the ue, determine whether to allow the ue to perform handover access based on the handover request, if so, send a handover confirmation instruction to the source base station based on a mobility management functional entity of the target base station, and execute a path handover request by the mobility management functional entity in response to the radio resource control information reconfiguration completion instruction, and switch a data transmission path between the ue and the source base station to a data transmission path between the ue and the target base station based on the path handover request.

7. The radio access network system of claim 6, wherein the radio access network system further comprises:

the edge functional entity is deployed in the edge node and at least comprises a wireless connection safety functional entity, a wireless session management functional entity and a user plane functional entity;

the wireless connection safety function entity is used for establishing wireless connection with the source base station and the target base station and generating a safety key;

the wireless session management functional entity is configured to receive a protocol data unit session update request sent by the target base station, so that a user plane functional entity performs a protocol data unit session update operation, and send updated protocol data unit session information to the target base station;

the user plane function entity is configured to receive a protocol data unit session modification request sent by the wireless session management function entity, and perform a protocol data unit session update operation based on the protocol data unit session modification request.

8. A communication device, comprising:

the admission judgment module is configured to receive a switching request for user equipment sent by a source base station by a radio resource management and scheduling functional entity of the target base station, and judge whether the user equipment is allowed to switch access or not based on the switching request;

The instruction sending module is configured to send a confirmation switching instruction to the source base station by the mobility management function entity of the target base station if the user equipment is allowed to be switched in, so that the user equipment can reconfigure radio resource control information according to the confirmation switching instruction;

and the path switching module is configured to respond to the radio resource control information reconfiguration completion instruction by the mobility management functional entity of the target base station, execute a path switching request and switch the data transmission paths of the user terminal and the source base station into the data transmission paths of the user terminal and the target base station based on the path switching request.

9. A storage medium having stored thereon a computer program, which when executed by a processor implements the communication method of any of claims 1 to 5.

10. An electronic device, comprising:

a processor; and

a memory for storing executable instructions of the processor;

wherein the processor is configured to perform the communication method of any one of claims 1 to 5 via execution of the executable instructions.