CN116939741A

CN116939741A - Remote terminal path switching method and device, storage medium and electronic equipment

Info

Publication number: CN116939741A
Application number: CN202210368859.2A
Authority: CN
Inventors: 彭硕; 毕奇; 王静; 蒋峥; 佘小明
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2023-10-24

Abstract

The embodiment of the disclosure provides a remote terminal path switching method, a remote terminal path switching device, a storage medium and electronic equipment, relates to the technical field of communication, and aims to at least partially solve the technical problem that a remote terminal is not supported to be switched from a source relay terminal under a source base station to a target terminal under a target base station in the related technology. The related remote terminal path switching method comprises the following steps: acquiring a measurement report reported by a remote terminal, wherein the measurement report comprises information of candidate relay terminals; determining a target relay terminal under the target base station according to the measurement report; transmitting a switching request message to a target base station; acquiring a switching request confirmation message sent by a target base station, wherein the switching request confirmation message comprises new Radio Resource Control (RRC) configuration information; the method and the device for the RRC reconfiguration of the remote terminal can ensure the service continuity of the remote terminal in the moving process.

Description

Remote terminal path switching method and device, storage medium and electronic equipment

Technical Field

The disclosure relates to the technical field of communication, and in particular relates to a remote terminal path switching method, a device, a storage medium and electronic equipment.

Background

Currently, a large number of terminal devices located at the network end are connected through an inter-device communication technology to form a near-field communication network, and are included in the operating range of a 6G (6 th generation mobile networks, sixth-generation mobile communication technology) network system of a telecom operator, so as to jointly form a near-field communication system controlled by the operator network. The novel near field communication system facing the 6G has potential to be an effective way for solving the problems of high frequency coverage and the like in the 6G network system by utilizing UE to Network Relay (terminal to network relay).

The 3GPP (3 rd Generation Partnership Project, third generation partnership project) is researching a related art in which terminals communicate with base stations indirectly through Relay terminals (Relay UEs), namely UE sidelink Relay (side-uplink Relay). Remote UEs (Remote terminals) need to establish an end-to-end connection with the base station through SL (Sidelink) relay. Under different network conditions, the Remote UE may choose an appropriate way to communicate, so there is a case of path switching at the Remote terminal. To ensure the continuity of the service of the Remote UE, two path switching modes of switching from an indirect path (equivalent to a path in which the Remote UE is connected to the base station through a Relay UE, wherein a path in which terminals communicate is referred to as a PC5 link) to a direct path (refer to a path in which terminals directly communicate with the base station, also referred to as a Uu link) and from the direct path to the indirect path are supported within the service range of the same base station. But currently there is no handover scheme for remote terminals from indirect to indirect paths (i.e. remote terminals from source relay terminals under source base stations to target terminals of target base stations), and involving cross base stations.

Disclosure of Invention

The embodiment of the disclosure provides a remote terminal path switching method, a remote terminal path switching device, a storage medium and electronic equipment, which are used for at least partially solving the technical problem that a remote terminal is not supported to be switched from a source relay terminal under a source base station to a target terminal under a target base station in the related art.

According to a first aspect of the present disclosure, there is provided a remote terminal path switching method, including: acquiring a measurement report reported by a remote terminal, wherein the measurement report comprises information of candidate relay terminals; determining a target base station and a target relay terminal under the target base station according to the measurement report; transmitting a handover request message to the target base station, wherein the handover request message is used for requesting to handover the remote terminal from being connected with a source base station through a source relay terminal to being connected with the target base station through the target relay terminal; acquiring a switching request confirmation message sent by the target base station, wherein the switching request confirmation message comprises new Radio Resource Control (RRC) configuration information; and sending a first RRC reconfiguration message to the remote terminal so that the remote terminal can establish connection with the target relay terminal according to the first RRC reconfiguration message, wherein the first RRC reconfiguration message comprises the new RRC configuration information.

Optionally, the method further comprises: acquiring a context release message of the remote terminal sent by the target base station; and releasing the wireless resource of the remote terminal context.

Optionally, the method further comprises: after releasing the radio resource of the remote terminal context, sending a second RRC reconfiguration message to the source relay terminal, where the second RRC reconfiguration message is used to instruct the source relay terminal to release radio link control RLC configuration information of a first channel, RLC configuration information of a second channel, and mapping configuration information between a radio bearer of the remote terminal and the second channel, where the first channel is a Uu RLC channel between the source relay terminal and the source base station for relaying the remote terminal, and the second channel is a PC5 RLC channel between the source relay terminal and the remote terminal, and the radio bearer includes a signaling resource bearer SRB and a data resource bearer DRB.

Optionally, the measurement report further includes: the identity of the source relay terminal, the information of the serving cell, and the information of the signal quality of the communication link between the remote terminal and the source relay terminal.

Optionally, the handover request message further includes: information on the signal quality of the communication link between the remote terminal and the target relay terminal.

Optionally, the new radio resource control RRC configuration information includes: the identification of the target relay terminal, the temporary or local identification of the remote terminal, communication interface RLC channel configuration information between the remote terminal and the target relay terminal, radio bearers of the remote terminal, and mapping configuration information between RLC channels for communication between the remote terminal and the target relay terminal.

Optionally, the method further comprises: and in the period that the remote terminal is switched to the target relay terminal by the source relay terminal, sending a Sequence Number (SN) state transfer message to the target base station so as to transmit a packet data convergence protocol (PDCP SN) state and a Hyper Frame Number (HFN) state to the target base station.

According to a second aspect of the present disclosure, there is also provided a remote terminal path switching method, including: acquiring a switching request message sent by a source base station, wherein the switching request message is used for requesting to switch the remote terminal from being connected with the source base station through a source relay terminal to being connected with a target base station through a target relay terminal; transmitting a switching request confirmation message to the source base station, wherein the switching request confirmation message comprises new RRC configuration information; and sending a third RRC reconfiguration message to the target relay terminal, wherein the third RRC reconfiguration message is used for indicating Radio Link Control (RLC) configuration information of a third channel, RLC configuration information of a fourth channel and mapping configuration information between the fourth channel and radio bearers of the remote terminal, the third channel is a Uu RLC channel between the target relay terminal and the target base station for relaying the remote terminal, and the fourth channel is a PC5RLC channel between the target relay terminal and the remote terminal.

Optionally, the method further comprises: and sending a context release message of the remote terminal to the source base station, wherein the context release message is used for indicating the source base station to release wireless resources of the context of the remote terminal.

Optionally, the radio bearer includes a signaling resource bearer SRB and a data resource bearer DRB.

According to a third aspect of the present disclosure, there is also provided a remote terminal path switching method, including: after finding a candidate relay terminal, sending a measurement report to a source base station, wherein the measurement report comprises information of the candidate relay terminal; acquiring a Radio Resource Control (RRC) reconfiguration message from the source base station, wherein the RRC reconfiguration message comprises new RRC configuration information from a target base station; and establishing connection with the target relay terminal according to the RRC reconfiguration message.

Optionally, the method further comprises: after the RRC reconfiguration message from the source base station is acquired, data transmission to the source relay terminal is stopped.

Optionally, the method further comprises: and after establishing connection with the target relay terminal according to the RRC reconfiguration message, switching the RRC connection to the target base station, and sending the RRC reconfiguration completion message to the target base station through the target relay terminal.

Optionally, the method further comprises: after acquiring the RRC reconfiguration message from the source base station, the PC5 link between the remote terminal and the source relay terminal is released.

According to a fourth aspect of the present disclosure, there is also provided a remote terminal path switching apparatus, including: the first acquisition module is used for acquiring a measurement report reported by a remote terminal, wherein the measurement report comprises information of candidate relay terminals; the determining module is used for determining a target base station and a target relay terminal under the target base station according to the measurement report; the sending module is used for sending a switching request message to the target base station, wherein the switching request message is used for requesting to switch the remote terminal from being connected with a source base station through a source relay terminal to being connected with the target base station through the target relay terminal; a second obtaining module, configured to obtain a handover request acknowledgement message sent by the target base station, where the handover request acknowledgement message includes new radio resource control RRC configuration information; and the second sending module is used for sending a first RRC reconfiguration message to the remote terminal so that the remote terminal can establish connection with the target relay terminal according to the RRC reconfiguration message, wherein the first RRC reconfiguration message comprises the new RRC configuration information.

According to a fifth aspect of the present disclosure, there is also provided a remote terminal path switching apparatus, including: the third acquisition module is used for acquiring a switching request message sent by a source base station, wherein the switching request message is used for requesting to switch the remote terminal from being connected with the source base station through a source relay terminal to being connected with a target base station through a target relay terminal; a third sending module, configured to send a handover request acknowledgement message to the source base station, where the handover request acknowledgement message includes new RRC configuration information; a fourth sending module, configured to send a third RRC reconfiguration message to the target relay terminal, where the third RRC reconfiguration message is used to indicate radio link control RLC configuration information of a third channel, RLC configuration information of a fourth channel, and mapping configuration information between the fourth channel and a radio bearer of the remote terminal, where the third channel is a Uu RLC channel between the target relay terminal and the target base station for relaying the remote terminal, and the fourth channel is a PC5 RLC channel between the target relay terminal and the remote terminal.

According to a sixth aspect of the present disclosure, there is also provided a remote terminal path switching apparatus, including: a fifth sending module, configured to send a measurement report to a source base station after a candidate relay terminal is found, where the measurement report includes information of the candidate relay terminal; a fourth obtaining module, configured to obtain a radio resource control RRC reconfiguration message from the source base station, where the RRC reconfiguration message includes new RRC configuration information from a target base station; and the establishing module is used for establishing connection with the target relay terminal according to the RRC reconfiguration message.

According to a seventh aspect of the present disclosure, there is also provided an electronic device, including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform any one of the remote terminal path switching methods provided by the embodiments of the present disclosure via execution of the executable instructions.

According to an eighth aspect of the present disclosure, there is also provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements any one of the remote terminal path switching methods provided by the embodiments of the present disclosure.

According to the remote terminal path switching method, the remote terminal path switching device, the storage medium and the electronic equipment, after the measurement report of the remote terminal is acquired, the target base station and the target relay terminal under the target base station are determined according to the measurement report, so that the remote terminal is requested to be switched from the source relay terminal of the source base station to the target relay terminal of the target base station, after the switching request confirmation message comprising RRC configuration information is acquired from the target base station, the remote terminal can establish connection with the target relay terminal based on the RRC configuration information, so that the remote terminal can be switched from the source relay terminal of the source base station to the target relay terminal of the target base station through the target relay, and service continuity of the remote terminal in a moving process can be ensured.

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.

Fig. 1 is a schematic diagram of a near field communication network shown in accordance with an exemplary embodiment of the present disclosure;

fig. 2 is a flowchart illustrating a remote terminal path switching method performed at a source base station side according to an exemplary embodiment of the present disclosure;

fig. 3 is a flowchart illustrating a remote terminal path switching method performed at a source base station side according to an exemplary embodiment of the present disclosure;

fig. 4 is a flowchart illustrating a remote terminal path switching method performed at a source base station side according to an exemplary embodiment of the present disclosure;

fig. 5 is a flowchart illustrating a remote terminal path switching method performed at a source base station side according to an exemplary embodiment of the present disclosure;

Fig. 6 is a flowchart illustrating a remote terminal path switching method performed at a target base station side according to an exemplary embodiment of the present disclosure;

fig. 7 is a flowchart illustrating a remote terminal path switching method performed at a target base station side according to an exemplary embodiment of the present disclosure;

FIG. 8 is a flowchart illustrating a remote terminal path switching method performed at a remote terminal side according to an exemplary embodiment of the present disclosure;

FIG. 9 is a flowchart illustrating a remote terminal path switching method performed at a remote terminal side according to an exemplary embodiment of the present disclosure;

FIG. 10 is a flowchart illustrating a remote terminal path switching method performed at a remote terminal side according to an exemplary embodiment of the present disclosure;

FIG. 11 is a flowchart illustrating a remote terminal path switching method performed at a remote terminal side according to an exemplary embodiment of the present disclosure;

FIG. 12 is a flowchart illustrating a remote terminal path switching method according to an exemplary embodiment of the present disclosure;

FIG. 13 is a flowchart illustrating a remote terminal path switching method according to an exemplary embodiment of the present disclosure;

fig. 14 is a schematic structural view of a remote terminal path switching device at a source base station side according to an exemplary embodiment of the present disclosure;

Fig. 15 is a schematic structural diagram of a remote terminal path switching apparatus at a target base station side according to an exemplary embodiment of the present disclosure;

fig. 16 is a schematic structural view of a remote terminal path switching apparatus at a remote terminal side according to an exemplary embodiment of the present disclosure;

fig. 17 is a schematic 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.

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 present disclosure relates to remote terminal path switching in a near field communication scenario, where a network element includes a base station (radio access network node) and a terminal, and in particular, to a remote terminal, a source base station, a source relay terminal, a target base station, and a target relay terminal. When the remote terminal is connected to the network through a Layer-2 (L2) relay terminal, the remote terminal supports Inter-base station (Inter-gNB) relay path switching, and the network controls the communication path to be switched from a source relay terminal under a source base station to a target relay terminal under a target base station. Fig. 1 is a schematic diagram of a near-field communication network according to an exemplary embodiment of the present disclosure, as shown in fig. 1, in which a remote UE (terminal) is connected to a base station 1 through a relay UE1 before performing path switching, where the relay UE1 is a source relay UE for the remote UE, and the base station 1 is a source base station; the remote UE moves from the base station 1 to the base station 2, needs to be switched from the relay UE1 under the base station 1 to the relay UE2 under the base station 2, and is connected with the base station 2 through the relay UE2 after the remote UE performs path switching, wherein the relay UE2 is a target UE, and the base station 2 is a target base station. In fig. 1, the path between the remote UE and the relay UE is also referred to as a PC5 link, and the path between the relay UE and the base station is also referred to as a Uu link.

Fig. 2 is a flowchart illustrating a remote terminal path switching method that may be performed by a source base station of a remote terminal, as shown in fig. 2, according to an exemplary embodiment of the present disclosure, the method comprising:

in step S202, a measurement report reported by a remote terminal is obtained, where the measurement report includes information of candidate relay terminals;

in an exemplary embodiment, the measurement report may include information of one or more candidate relay terminals, for example, may include IDs (identities) of the candidate relay terminals, and may further include information of serving cell IDs and PC5 link signal quality.

In step S204, determining a target base station and a target relay terminal under the target base station according to the measurement report;

in an exemplary embodiment, the source base station may determine the target base station and the target relay terminal under the target base station according to the measurement report reported by the remote terminal.

In step S206, a handover request message is sent to the target base station, where the handover request message is used to request that the remote terminal be handed over from being connected to a source base station through a source relay terminal to being connected to the target base station through the target relay terminal;

In an exemplary embodiment, the handover request message may include an identification of the target relay terminal.

In step S208, a handover request acknowledgement message sent by the target base station is obtained, where the handover request acknowledgement message includes new RRC (Radio Resource Control ) configuration information;

in an exemplary embodiment, the new RRC configuration information is used to instruct the remote terminal to establish a near field communication connection with the target relay terminal. The new RRC configuration information may include, among other things, an identification of a target Relay terminal (Relay UE ID), a temporary or local identification of a Remote terminal (Remote UE temp/local ID), a radio bearer of the Remote terminal, and mapping configuration information between RLC (Radio Link Control, radio link layer control protocol) channels used for the Remote terminal to communicate with the target Relay terminal.

In step S210, a first RRC reconfiguration message is sent to the remote terminal, so that the remote terminal establishes a connection with the target relay terminal according to the first RRC reconfiguration message, where the first RRC reconfiguration message includes the new RRC configuration information.

In an exemplary embodiment, the source base station forwards the new RRC configuration information from the target base station received by the source base station in the handover request confirm message by sending an RRC reconfiguration message to the remote terminal. After receiving the RRC reconfiguration message, the remote terminal may establish a PC5 (referred to as a communication interface between terminals) connection with the target relay terminal according to new RRC configuration information in the RRC reconfiguration message.

It should be noted that the remote terminal in the embodiments of the present disclosure is not limited to being located within the coverage area of the base station or outside the coverage area of the base station.

According to the remote terminal path switching method, after the measurement report of the remote terminal is obtained, the target base station and the target relay terminal under the target base station are determined according to the measurement report, so that the remote terminal is requested to be switched from the source relay terminal of the source base station to the target relay terminal of the target base station, after the switching request confirmation message comprising RRC configuration information is obtained from the target base station, the remote terminal can establish connection with the target relay terminal based on the RRC configuration information, so that the remote terminal can be switched from the source relay terminal of the source base station to the target relay terminal of the target base station through the target relay, service continuity of the remote terminal in a moving process can be maintained, cellular network coverage expansion is realized, and user experience is improved.

Fig. 3 is a flowchart illustrating a remote terminal path switching method according to an exemplary embodiment of the present disclosure, and as shown in fig. 3, the method may further include, on the basis of the method shown in fig. 2:

In step S302, a context release message of the remote terminal sent by the target base station is obtained;

in an exemplary embodiment, after the target base station knows that the remote terminal has completed RRC reconfiguration, a context release message of the remote terminal may be sent to the source base station to indicate that the source base station is allowed to release remote terminal related resources.

In step S304, the radio resources of the remote terminal context are released.

In an exemplary embodiment, the source base station may release the radio resources of the remote terminal context after receiving the context release message of the remote terminal sent by the target base station.

The source base station releases the wireless resources of the remote terminal context according to the context release message of the remote terminal sent by the target base station, so that the source base station can release corresponding resources in time, invalid occupation of the resources is reduced, and the resource utilization rate is improved.

Fig. 4 is a flowchart illustrating a remote terminal path switching method according to an exemplary embodiment of the present disclosure, and as shown in fig. 4, the method may further include, on the basis of the method shown in fig. 3:

in step S402, after releasing the radio resource of the remote terminal context, a second RRC reconfiguration message is sent to the source relay terminal, where the second RRC reconfiguration message is used to instruct the source relay terminal to release RLC configuration information of a first channel, RLC configuration information of a second channel, and mapping configuration information between a radio bearer of the remote terminal and the second channel, where the first channel is a Uu RLC channel between the source relay terminal and the source base station for relaying the remote terminal, and the second channel is a PC5 RLC channel between the source relay terminal and the remote terminal, and the radio bearer includes a signaling resource bearer SRB and a data resource bearer DRB.

Wherein the first channel refers to Uu RLC channel through which the remote terminal communicates with the source base station through the source relay terminal.

After releasing the radio resource of the remote terminal context, the source base station sends a second RRC reconfiguration message to the source relay terminal to instruct the source relay terminal to release Uu and PC5 RLC configuration information for relay and bearer mapping configuration between PC5 RLC and Uu RLC, so that the source relay terminal can release corresponding resources in time, invalid occupation of the resources is reduced, and resource utilization rate is improved.

In an embodiment of the present disclosure, the measurement report may further include:

information of the source relay terminal, such as a source relay terminal ID, information of the serving cell, such as a serving cell ID, and information of the signal quality of a communication link between the remote terminal and the source relay terminal.

The remote terminal includes a source relay terminal ID in a measurement report sent to the source base station, so that the source base station can identify the source relay terminal according to the ID, and the source base station can send an RRC reconfiguration message for indicating the source relay terminal to release the related resources of the remote terminal to the source relay terminal after releasing the wireless resources of the context of the remote terminal; the remote terminal includes the service cell ID in the measurement report sent to the source base station, so that the source base station can determine the target base station according to the service cell ID; the remote terminal includes information of the signal quality of the communication link between the remote terminal and the source relay terminal in the measurement report sent to the source base station, so that the source base station can determine the signal quality of the communication link between the remote terminal and the source relay terminal according to the information of the link signal quality.

In an embodiment of the present disclosure, the handover request message may further include:

information on the signal quality of the communication link between the remote terminal and the target relay terminal.

In an exemplary embodiment, after receiving the handover request message from the source base station, the target base station may further determine whether to allow the remote terminal to be handed over from the source relay terminal under the source base station to the target relay terminal under the target base station according to the information of the signal quality of the communication link between the remote terminal and the target relay terminal in the handover request message, e.g., the target base station may determine to allow the remote terminal to be handed over from the source relay terminal under the source base station to the target relay terminal under the target base station when the information of the signal quality of the communication link between the remote terminal and the target relay terminal in the handover request message indicates that the signal quality of the communication link between the remote terminal and the target relay terminal satisfies a preset quality index; and when the information of the communication link signal quality between the remote terminal and the target relay terminal in the switching request message indicates that the communication link signal quality between the remote terminal and the target relay terminal does not meet the preset quality index, determining that the remote terminal is not allowed to be switched from the source relay terminal under the source base station to the target relay terminal under the target base station.

The switching request message sent by the source base station to the target base station comprises the information of the signal quality of the communication link between the remote terminal and the target relay terminal, so that the target base station can determine whether to allow the remote terminal to perform current path switching according to the signal quality of the communication link between the remote terminal and the target relay terminal, the path switching of the remote terminal can be determined by the source base station of the remote terminal and the target base station, and the control strength of the network side on the path switching of the remote terminal is improved.

Fig. 5 is a flowchart illustrating a remote terminal path switching method according to an exemplary embodiment of the present disclosure, and as shown in fig. 5, the method may further include, on the basis of the method shown in fig. 2:

in step S502, during a period when the remote terminal is handed over from a source relay terminal to the target relay terminal, a sequence number SN status transfer message is sent to the target base station to transmit an uplink PDCP (Packet Data Convergence Protocol ) SN status and an HFN (Hyper Frame Number, super frame number) status, or a downlink PDCP SN status and an HFN status, to the target base station.

Fig. 6 is a flowchart illustrating a remote terminal path switching method that may be performed by a target base station, according to an exemplary embodiment of the present disclosure, as shown in fig. 6, the method including:

In step S602, a handover request message sent by a source base station is obtained, where the handover request message is used to request that the remote terminal be handed over from being connected to the source base station through a source relay terminal to being connected to the target base station through the target relay terminal;

in an exemplary embodiment, an identification of the target relay terminal may be included in the handover request message, and the target base station may identify the target relay terminal according to the identification.

In step S604, a handover request acknowledgement message is sent to the source base station, where the handover request acknowledgement message includes new RRC configuration information;

in an exemplary embodiment, the target base station performs access control and provides new RRC configuration information as part of the handover request message, wherein the new RRC configuration information is used to cause the remote terminal to perform RRC reconfiguration so that the remote terminal establishes a connection with the target relay terminal through the RRC reconfiguration.

In step S606, a third RRC reconfiguration message is sent to the target relay terminal, where the third RRC reconfiguration message is used to indicate RLC configuration information of a third channel, RLC configuration information of a fourth channel, and mapping configuration information between radio bearers of the fourth channel and the remote terminal, where the third channel is a Uu RLC channel between the target relay terminal and the target base station for relaying the remote terminal, and the fourth channel is a PC5 RLC channel between the target relay terminal and the remote terminal.

In an exemplary embodiment, the radio bearer includes an SRB and a DRB.

In an exemplary embodiment, the handover request message from the source base station acquired by the target base station may further include information of a communication link signal quality between the remote terminal and the target relay terminal, based on which, after receiving the handover request message from the source base station, the target base station may further determine whether to allow the remote terminal to be handed over from the source relay terminal under the source base station to the target relay terminal under the target base station according to the information of the communication link signal quality between the remote terminal and the target relay terminal in the handover request message, e.g., the target base station may determine to allow the remote terminal to be handed over from the source relay terminal under the source base station to the target relay terminal under the target base station when the information of the communication link signal quality between the remote terminal and the target relay terminal in the handover request message indicates that the communication link signal quality between the remote terminal and the target relay terminal does not satisfy the preset quality index.

The switching request message sent by the source base station to the target base station comprises the information of the signal quality of the communication link between the remote terminal and the target relay terminal, so that the target base station can determine whether to allow the remote terminal to perform current path switching according to the information of the signal quality of the communication link between the remote terminal and the target relay terminal, the path switching of the remote terminal can be determined by the source base station of the remote terminal and the target base station, and the control strength of the network side on the path switching of the remote terminal is improved.

Fig. 7 is a flowchart illustrating a remote terminal path switching method according to an exemplary embodiment of the present disclosure, and as shown in fig. 7, the method may further include, on the basis of the method shown in fig. 6:

in step S702, a context release message of the remote terminal is sent to the source base station, where the context release message is used to instruct the source base station to release radio resources of the remote terminal context.

In an exemplary embodiment, before step S702, the target base station receives the RRC reconfiguration complete message sent by the remote terminal through the target relay terminal, and learns that the remote terminal has completed the path switching procedure, and the target base station performs step S702. After the target base station determines that the remote terminal has completed the path switching process, the target base station sends a context release message of the remote terminal to the source base station, so that the source base station can timely release resources which are not used any more, and the resource utilization rate is improved.

Fig. 8 is a flowchart illustrating a remote terminal path switching method that may be performed by a remote terminal, as shown in fig. 8, according to an exemplary embodiment of the present disclosure, the method comprising:

in step S802, after finding a candidate relay terminal, sending a measurement report to a source base station, where the measurement report includes information of the candidate relay terminal;

in an exemplary embodiment, the remote terminal discovers one or more candidate relay terminals through measurement, and reports information of the one or more candidate relay terminals to the source base station by sending a measurement report to the source base station, where the information of the candidate relay terminals in the measurement report may be a candidate relay terminal ID.

In step S804, an RRC reconfiguration message from the source base station is acquired, where the RRC reconfiguration message includes new RRC configuration information from the target base station;

in an exemplary embodiment, the remote terminal may reconfigure RRC according to the received RRC reconfiguration message to establish a connection with the target relay terminal. The RRC reconfiguration message may include an identification of a target relay terminal, a temporary or local identification of a remote terminal, RLC channel configuration information of a communication interface between the remote terminal for relaying and the target relay terminal, and bearer mapping configuration information between the remote terminal and the target relay terminal.

In step S806, a connection is established with the target relay terminal according to the RRC reconfiguration message.

In an exemplary embodiment, the remote terminal may establish a PC5 connection with the target relay terminal according to the new RRC configuration information in the RRC reconfiguration message.

Fig. 9 is a flowchart illustrating a remote terminal path switching method according to an exemplary embodiment of the present disclosure, and as shown in fig. 9, the method may further include, on the basis of the method shown in fig. 8:

in step S902, after acquiring the RRC reconfiguration message from the source base station, transmission of data to the source relay terminal is stopped.

In an exemplary embodiment, the remote terminal stops UP (user plane) and CP (control plane) transmissions of the current PC5 interface (i.e., source relay terminal) after receiving the RRC reconfiguration message from the source base station.

After the remote terminal acquires the RRC reconfiguration message from the source base station, the remote terminal can determine that the remote terminal needs to perform path switching, so that the transmission of data to the source relay terminal is stopped at the moment, the follow-up data transmission can be ensured to be transmitted through the target relay terminal, and the data transmission quality can be improved.

Fig. 10 is a flowchart illustrating a remote terminal path switching method according to an exemplary embodiment of the present disclosure, and as shown in fig. 10, the method may further include, on the basis of the method shown in fig. 8:

In step S1002, after establishing a connection with the target relay terminal according to the RRC reconfiguration message, the RRC connection is switched to the target base station, and the RRC reconfiguration complete message is sent to the target base station through the target relay terminal.

In an exemplary embodiment, the remote terminal switches the RRC connection to the target base station after establishing the connection with the target relay terminal, so that the remote terminal realizes connection with the target base station through the target relay terminal. The remote terminal sends the RRC reconfiguration completion message to the target base station through the target relay terminal, so that the target base station can acquire that the remote terminal has completed the path switching process, and on the basis, the target base station can inform the source base station of releasing the resources of the context resource of the related terminal.

Fig. 11 is a flowchart illustrating a remote terminal path switching method according to an exemplary embodiment of the present disclosure, and as shown in fig. 11, the method may further include, on the basis of the method shown in fig. 8:

in step S1102, after acquiring the RRC reconfiguration message from the source base station, the PC5 link between the remote terminal and the source relay terminal is released.

In an exemplary embodiment, the remote terminal or the source relay terminal may initiate the PC5 connection release, so as to release the PC5 link between the remote terminal and the source relay terminal, and timely release the link resource, thereby improving the resource utilization.

The following describes an exemplary remote terminal path switching method according to an embodiment of the present disclosure with reference to fig. 12 and 13.

In the example shown in fig. 12, the remote terminal path switching method includes:

in step S1202, after the Remote UE (Remote terminal) measures/discovers the candidate Relay UE, the Remote UE reports one or more candidate Relay UEs to the source base station, and the measurement report may include the source Relay UE ID and the candidate Relay UE ID, the serving cell ID, and information of the PC5 link signal quality;

in step S1204, the source base station decides to switch to the target Relay UE under the target base station;

in step S1206, the source base station initiates a handover procedure and sends a handover request message to the target base station, where the handover request message may include, in addition to the signaling required for handover, a target Relay UE ID and signal quality information of the target Relay link;

in step S1208, the target base station performs access control and provides a new RRC configuration as part of the handover request confirm message. Wherein the new RRC configuration may include a target Relay UE ID, a Remote UE temp/local ID, a PC5 RLC channel configuration for Relay and associated end-to-end radio bearers;

in step S1210, the target base station may choose to send an RRC reconfiguration message to the target Relay UE, where the RRC reconfiguration message may include Uu and PC5 RLC channel configurations for Relay, and a bearer mapping configuration;

In step S1212, the source base station forwards the RRC configuration received in the handover request confirm message by sending an RRC reconfiguration message to the Remote UE. After the Remote UE receives the RRC reconfiguration message, stopping UP (user plane) and CP (control plane) transmissions of the current PC5 interface (source Relay UE);

in step S1214, the Remote UE establishes a new PC5 connection with the target Relay UE;

in step S1216, the source base station transmits an SN state transfer message to the target base station to transmit uplink/downlink PDCP SN and HFN states during handover;

in step S1218, the Remote UE switches the RRC connection to the target base station;

in step S1219, the Remote UE completes the path switching procedure by transmitting an RRC reconfiguration complete message to the target base station by the Relay UE;

in step S1220, the target base station transmits a UE context release message to the source base station indicating that release of radio and CP resources for the relevant UE context is allowed;

in step S1222, the source base station sends an RRC reconfiguration message to the source Relay UE, releasing Uu and PC5 RLC configurations for Relay, and bearer mapping configuration between PC5 RLC and Uu RLC;

in step S1224, the Remote UE or the source Relay UE initiates a PC5 connection release to release the old PC5 link.

In the example shown in fig. 13, the remote terminal path switching method includes:

in step S1302, after the Remote UE (Remote terminal) measures/discovers the candidate Relay UE, the Remote UE reports one or more candidate Relay UEs to the source base station, and the measurement report may include the source Relay UE ID and the candidate Relay UE ID, the serving cell ID, and information of the PC5 link signal quality;

in step S1304, the source base station decides to switch to the target Relay UE under the target base station;

in step S1306, the source base station initiates a handover procedure and sends a handover request message to the target base station;

in step S1308, the target base station performs access control and provides a new RRC configuration as part of the handover request confirm message.

In step S1306, the target base station sends an RRC reconfiguration message and an RRC reconfiguration complete message to the target relay UE;

in step S1310, the source base station forwards the RRC configuration received in the handover request confirm message by sending an RRC reconfiguration message to the Remote UE.

In step S1312, the Remote UE initiates a PC5 connection release to release the old PC5 link;

in step S1314, the Remote UE establishes a new PC5 connection with the target Relay UE;

in step S1316, the source base station transmits an SN status transfer message to the target base station to transmit uplink/downlink PDCP SN and HFN status during handover;

In step S1318, the Remote UE switches the RRC connection to the target base station;

in step S1319, the Remote UE completes the path switching procedure by sending an RRC reconfiguration complete message to the target base station by the Relay UE;

in step S1320, the target base station transmits a UE context release message to the source base station indicating that release of radio and CP resources for the relevant UE context is allowed;

in step S1322, the source base station transmits an RRC reconfiguration message to the source Relay UE, releasing Uu and PC5 RLC configurations for Relay, and a bearer mapping configuration between PC5 RLC and Uu RLC.

In the example shown in fig. 13, the source base station may send an RRC reconfiguration message to the source Relay UE at any timing after step S1310.

Fig. 14 is a schematic structural diagram of a remote terminal path switching apparatus according to an exemplary embodiment of the present disclosure, and as shown in fig. 14, the apparatus 140 includes:

a first obtaining module 142, configured to obtain a measurement report reported by a remote terminal, where the measurement report includes information of a candidate relay terminal;

a determining module 144, configured to determine a target base station and a target relay terminal under the target base station according to the measurement report;

A sending module 146, configured to send a handover request message to the target base station, where the handover request message is used to request that the remote terminal be handed over from being connected to a source base station through a source relay terminal to being connected to the target base station through the target relay terminal;

a second obtaining module 148, configured to obtain a handover request acknowledgement message sent by the target base station, where the handover request acknowledgement message includes new radio resource control RRC configuration information;

and a second sending module 1410, configured to send a first RRC reconfiguration message to the remote terminal, so that the remote terminal establishes a connection with the target relay terminal according to the first RRC reconfiguration message, where the first RRC reconfiguration message includes the new RRC configuration information.

In an embodiment of the present disclosure, the remote terminal path switching apparatus may further include:

a fifth obtaining module, configured to obtain a context release message of the remote terminal sent by the target base station;

and the first releasing module is used for releasing the wireless resources of the remote terminal context.

A sixth sending module, configured to send a second RRC reconfiguration message to a source relay terminal after releasing radio resources of the remote terminal context, where the second RRC reconfiguration message is configured to instruct the source relay terminal to release radio link control RLC configuration information of a first channel, RLC configuration information of a second channel, and mapping configuration information between a radio bearer of the remote terminal and the second channel, where the first channel is a Uu RLC channel between the source relay terminal and the source base station for relaying the remote terminal, and the second channel is a PC5 RLC channel between the source relay terminal and the remote terminal, and the radio bearer includes a signaling resource bearer SRB and a data resource bearer DRB. .

In an embodiment of the present disclosure, the measurement report may further include: the identity of the source relay terminal, the information of the serving cell, and the information of the signal quality of the communication link between the remote terminal and the source relay terminal.

In an embodiment of the present disclosure, the new radio resource control RRC configuration information may include:

The identification of the target relay terminal, the temporary or local identification of the remote terminal, communication interface RLC channel configuration information between the remote terminal and the target relay terminal, radio bearers of the remote terminal, and mapping configuration information between RLC channels for communication between the remote terminal and the target relay terminal.

and a seventh sending module, configured to send a sequence number SN status transfer message to the target base station during a period when the remote terminal is switched from the source relay terminal to the target relay terminal, so as to transmit a packet data convergence protocol PDCP SN status and a hyper frame number HFN status to the target base station.

Fig. 15 is a schematic structural diagram of a remote terminal path switching apparatus according to an exemplary embodiment of the present disclosure, and as shown in fig. 15, the apparatus 150 includes:

a third obtaining module 152, configured to obtain a handover request message sent by a source base station, where the handover request message is used to request that the remote terminal be handed over from being connected to the source base station through a source relay terminal to being connected to the target base station through the target relay terminal;

A third sending module 154, configured to send a handover request acknowledgement message to the source base station, where the handover request acknowledgement message includes new RRC configuration information;

a fourth sending module 156, configured to send a third RRC reconfiguration message to the target relay terminal, where the third RRC reconfiguration message is used to indicate RLC configuration information of a third channel, RLC configuration information of a fourth channel, and mapping configuration information between radio bearers of the fourth channel and the remote terminal, where the third channel is a Uu RLC channel between the target relay terminal and the target base station for relaying the remote terminal, and the fourth channel is a PC5 RLC channel between the target relay terminal and the remote terminal.

and an eighth sending module, configured to send a context release message of the remote terminal to the source base station, where the context release message is used to instruct the source base station to release radio resources of the remote terminal context.

In an embodiment of the present disclosure, the radio bearer includes an SRB and a DRB.

Fig. 16 is a schematic structural diagram of a remote terminal path switching apparatus according to an exemplary embodiment of the present disclosure, and as shown in fig. 16, the apparatus 160 includes:

A fifth sending module 162, configured to send a measurement report to a source base station after finding a candidate relay terminal, where the measurement report includes information of the candidate relay terminal;

a fourth obtaining module 164, configured to obtain a radio resource control RRC reconfiguration message from the source base station, where the RRC reconfiguration message includes new RRC configuration information from the target base station;

and an establishing module 166, configured to establish a connection with the target relay terminal according to the RRC reconfiguration message.

and the stopping module is used for stopping transmitting data to the source relay terminal after acquiring the RRC reconfiguration message from the source base station.

and the switching module is used for switching the RRC connection to the target base station after the connection is established with the target relay terminal according to the RRC reconfiguration message, and sending the RRC reconfiguration completion message to the target base station through the target relay terminal.

and the second releasing module is used for releasing the PC5 link between the remote terminal and the source relay terminal after the RRC reconfiguration message from the source base station is acquired.

The embodiment of the disclosure also provides an electronic device, including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to implement any of the remote terminal path switching methods described in the embodiments of the present disclosure via execution of the executable instructions.

The embodiment of the present disclosure also provides a computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor implements any one of the remote terminal path switching methods described in the embodiments of the present disclosure.

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.

As shown in fig. 17, the electronic device 1700 is in the form of a general purpose computing device. The components of electronic device 1700 may include, but are not limited to: the at least one processing unit 1710, the at least one storage unit 1720, and a bus 1730 connecting the different system components (including the storage unit 1720 and the processing unit 1710).

Wherein the storage unit stores program code that is executable by the processing unit 1710, such that the processing unit 1710 performs the 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 1710 may execute S202 shown in fig. 2, and acquire a measurement report reported by a remote terminal, where the measurement report includes information of a candidate relay terminal; s204, determining a target base station and a target relay terminal under the target base station according to the measurement report; s206, sending a switching request message to the target base station, wherein the switching request message is used for requesting to switch the remote terminal from being connected with a source base station through a source relay terminal to being connected with the target base station through the target relay terminal; s208, acquiring a switching request confirmation message sent by the target base station, wherein the switching request confirmation message comprises new Radio Resource Control (RRC) configuration information; s210, a first RRC reconfiguration message is sent to the remote terminal, so that the remote terminal establishes connection with the target relay terminal according to the RRC reconfiguration message, wherein the first RRC reconfiguration message comprises the new RRC configuration information.

The storage unit 1720 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 17201 and/or a cache memory unit 17202, and may further include a read only memory unit (ROM) 17203.

The storage unit 1720 may also include a program/utility 17204 having a set (at least one) of program modules 17205, such program modules 17205 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 1730 may be one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, a graphics accelerator port, a processing unit, or a local bus using any of a variety of bus architectures.

The electronic device 1700 may also communicate with one or more external devices 1800 (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 1700, and/or any device (e.g., router, modem, etc.) that enables the electronic device 1700 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 1750. Also, electronic device 1700 can communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, for example, the Internet, through network adapter 1760. As shown, network adapter 1760 communicates with other modules of electronic device 1700 via bus 1730. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 1700, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

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 device 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 said program product is run on the terminal device.

A program product for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read-only memory (CD-ROM) and comprise program code and may be run on a terminal device, 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, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk 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, RF, etc., 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 (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).

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.

Furthermore, although the steps of the methods in the present disclosure are depicted in a particular order in the drawings, this does not require or imply that the steps must be performed in that particular order or that all illustrated steps be performed in order 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.

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 mobile terminal, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

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 application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the 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.

Claims

1. A method for switching paths of a remote terminal, comprising:

acquiring a measurement report reported by a remote terminal, wherein the measurement report comprises information of candidate relay terminals;

determining a target base station and a target relay terminal under the target base station according to the measurement report;

transmitting a handover request message to the target base station, wherein the handover request message is used for requesting to handover the remote terminal from being connected with a source base station through a source relay terminal to being connected with the target base station through the target relay terminal;

acquiring a switching request confirmation message sent by the target base station, wherein the switching request confirmation message comprises new Radio Resource Control (RRC) configuration information;

And sending a first RRC reconfiguration message to the remote terminal so that the remote terminal can establish connection with the target relay terminal according to the first RRC reconfiguration message, wherein the first RRC reconfiguration message comprises the new RRC configuration information.

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

acquiring a context release message of the remote terminal sent by the target base station;

and releasing the wireless resource of the remote terminal context.

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

after releasing the radio resource of the remote terminal context, sending a second RRC reconfiguration message to the source relay terminal, where the second RRC reconfiguration message is used to instruct the source relay terminal to release radio link control RLC configuration information of a first channel, RLC configuration information of a second channel, and mapping configuration information between a radio bearer of the remote terminal and the second channel, where the first channel is a Uu RLC channel between the source relay terminal and the source base station for relaying the remote terminal, and the second channel is a PC5 RLC channel between the source relay terminal and the remote terminal, and the radio bearer includes a signaling resource bearer SRB and a data resource bearer DRB.

4. The method of claim 1, wherein the measurement report further comprises:

the identity of the source relay terminal, the information of the serving cell, and the information of the signal quality of the communication link between the remote terminal and the source relay terminal.

5. The method of claim 1, wherein the handover request message further comprises:

6. The method of claim 1, wherein the new RRC configuration information includes:

7. The method according to any one of claims 1 to 6, further comprising:

and in the period that the remote terminal is switched to the target relay terminal by the source relay terminal, sending a Sequence Number (SN) state transfer message to the target base station so as to transmit a packet data convergence protocol (PDCP SN) state and a Hyper Frame Number (HFN) state to the target base station.

8. A method for switching paths of a remote terminal, comprising:

acquiring a switching request message sent by a source base station, wherein the switching request message is used for requesting to switch the remote terminal from being connected with the source base station through a source relay terminal to being connected with a target base station through a target relay terminal;

transmitting a switching request confirmation message to the source base station, wherein the switching request confirmation message comprises new RRC configuration information;

and sending a third RRC reconfiguration message to the target relay terminal, wherein the third RRC reconfiguration message is used for indicating Radio Link Control (RLC) configuration information of a third channel, RLC configuration information of a fourth channel and mapping configuration information between the fourth channel and radio bearers of the remote terminal, the third channel is a Uu RLC channel between the target relay terminal and the target base station for relaying the remote terminal, and the fourth channel is a PC5 RLC channel between the target relay terminal and the remote terminal.

9. The method of claim 8, wherein the method further comprises:

and sending a context release message of the remote terminal to the source base station, wherein the context release message is used for indicating the source base station to release wireless resources of the context of the remote terminal.

10. The method of claim 8, wherein the radio bearer comprises a signaling resource bearer, SRB, and a data resource bearer, DRB.

11. A method for switching paths of a remote terminal, comprising:

after finding a candidate relay terminal, sending a measurement report to a source base station, wherein the measurement report comprises information of the candidate relay terminal;

acquiring a Radio Resource Control (RRC) reconfiguration message from the source base station, wherein the RRC reconfiguration message comprises new RRC configuration information from a target base station;

and establishing connection with the target relay terminal according to the RRC reconfiguration message.

12. The method of claim 11, wherein the method further comprises:

after the RRC reconfiguration message from the source base station is acquired, data transmission to the source relay terminal is stopped.

13. The method of claim 11, wherein the method further comprises:

and after establishing connection with the target relay terminal according to the RRC reconfiguration message, switching the RRC connection to the target base station, and sending the RRC reconfiguration completion message to the target base station through the target relay terminal.

14. The method according to any one of claims 11 to 13, further comprising:

after acquiring the RRC reconfiguration message from the source base station, the PC5 link between the remote terminal and the source relay terminal is released.

15. A remote terminal path switching apparatus, comprising:

the first acquisition module is used for acquiring a measurement report reported by a remote terminal, wherein the measurement report comprises information of candidate relay terminals;

the determining module is used for determining a target base station and a target relay terminal under the target base station according to the measurement report;

the sending module is used for sending a switching request message to the target base station, wherein the switching request message is used for requesting to switch the remote terminal from being connected with a source base station through a source relay terminal to being connected with the target base station through the target relay terminal;

a second obtaining module, configured to obtain a handover request acknowledgement message sent by the target base station, where the handover request acknowledgement message includes new radio resource control RRC configuration information;

and the second sending module is used for sending a first RRC reconfiguration message to the remote terminal so that the remote terminal can establish connection with the target relay terminal according to the first RRC reconfiguration message, wherein the first RRC reconfiguration message comprises the new RRC configuration information.

16. A remote terminal path switching apparatus, comprising:

the third acquisition module is used for acquiring a switching request message sent by a source base station, wherein the switching request message is used for requesting to switch the remote terminal from being connected with the source base station through a source relay terminal to being connected with a target base station through a target relay terminal;

a third sending module, configured to send a handover request acknowledgement message to the source base station, where the handover request acknowledgement message includes new RRC configuration information;

a fourth sending module, configured to send a third RRC reconfiguration message to the target relay terminal, where the third RRC reconfiguration message is used to indicate radio link control RLC configuration information of a third channel, RLC configuration information of a fourth channel, and mapping configuration information between the fourth channel and a radio bearer of the remote terminal, where the third channel is a Uu RLC channel between the target relay terminal and the target base station for relaying the remote terminal, and the fourth channel is a PC5 RLC channel between the target relay terminal and the remote terminal.

17. A remote terminal path switching apparatus, comprising:

A fifth sending module, configured to send a measurement report to a source base station after a candidate relay terminal is found, where the measurement report includes information of the candidate relay terminal;

a fourth obtaining module, configured to obtain a radio resource control RRC reconfiguration message from the source base station, where the RRC reconfiguration message includes new RRC configuration information from a target base station;

and the establishing module is used for establishing connection with the target relay terminal according to the RRC reconfiguration message.

18. An electronic device, comprising:

a processor; and

a memory for storing executable instructions of the processor;

wherein the processor is configured to perform the remote terminal path switching method of any one of claims 1 to 14 via execution of the executable instructions.

19. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the remote terminal path switching method of any of claims 1 to 14.