WO2018188185A1

WO2018188185A1 - Switching method and switching apparatus for remote device between relay devices

Info

Publication number: WO2018188185A1
Application number: PCT/CN2017/087796
Authority: WO
Inventors: 杨皓睿; 何岳; 金辉
Original assignee: 华为技术有限公司
Priority date: 2017-04-14
Filing date: 2017-06-09
Publication date: 2018-10-18

Abstract

Provided are a switching method and a switching apparatus for a remote device between relay devices, wherein same are for saving on the signaling overhead of the remote device when switching between relay devices. The method comprises: a remote device connecting with a network by means of a first relay device, and the remote device acquiring a first identifier of a second relay device; the remote device sending a request message to a base station by means of the first relay device, wherein the request message comprises the first identifier and indication information, and the indication information is used for characterizing the remote device as switching between the relay devices; and the request message is used for requesting for the base station to switch the remote device from connecting to the network by means of the first relay device to connecting to the network by means of the second relay device, and the remote device receiving a response message, with regard to the request message, returned by the base station; and the remote device establishing a connection with the second relay device based on the response message.

Description

Method and switching device for switching remote device between relay devices

This application claims the priority of the Chinese Patent Application filed on April 14, 2017, the Chinese Patent Office, Application No. 2017 1024 5606.5, entitled "A Method for Path Switching Between Two Relay Devices", the entire contents of which are hereby incorporated by reference. The citations are incorporated herein by reference.

Technical field

The present application relates to the field of communications technologies, and in particular, to a method and a switching device for a remote device to switch between relay devices.

Background technique

Currently, some types of wearable devices can be directly connected to the network. For example, a smart watch with a Subscriber Identity Module (SIM) card can be directly connected to the network to make a call. Due to the limitation of the size of the wearable device, the battery and antenna of the wearable device are the main problems affecting the communication of the wearable device. The battery of the wearable device is small, resulting in short standby time; the antenna design of the wearable device is difficult, and only a single antenna can be realized at present, so it takes more time and network resources to transmit data.

One solution to the above problem is that the wearable device is connected to the network through the surrounding relay device, so that the power of the wearable device can be saved and the transmission efficiency can be improved. For example, the relay device can be a mobile phone. When the wearable device accesses the network through the relay device, the wearable device functions as a remote device, and the relay device transmits uplink and downlink data and signaling to the wearable device. In this way, the wearable device can be directly connected to the base station through a direct connection path; or can be connected to the base station through an indirect path, that is, connected to the base station through the relay device.

However, when the wearable device moves, the relay device moves, the relay device is insufficient to continue to provide the relay service, etc., the wearable device needs to switch from the original relay device to the new relay in order to continue to save its own power. The device, that is, the path switch between the two relay devices. Assuming that the wearable device is currently accessing the network through the relay device 1, it needs to be switched to access the network through the relay device 2. The relay device 1 and the relay device 2 may belong to the same base station management, and may also belong to different base station management. FIG. 1 is a schematic diagram of switching between the relay device 1 and the relay device 2 belonging to the same base station management, and FIG. 2 is a relay device 1 and The relay device 2 belongs to a handover diagram managed by different base stations.

In the prior art, one way for a wearable device to switch between relay devices is as follows. After the wearable device accesses the network through the relay device, the wearable device periodically detects the signal quality of the PC5 link. When the wearable device finds that the signal quality of the PC5 is lower than the set threshold, the wearable device is centered. After the device initiates the request of the directly connected base station, the base station sends a Radio Resource Control (RRC) connection reconfiguration message to the wearable device after receiving the request forwarded by the relay device, and informs the wearable device that the base station needs to directly connect to the base station. The configuration of the Radio Bearer (RB) enables the wearable device to connect directly to the base station. After receiving the RRC connection reconfiguration message, the wearable device disconnects the PC5 link of the relay device and establishes a Uu link with the base station. In order to save power and the like, when the wearable device finds that there is a new relay device nearby, the base station initiates a request to access the network through the new relay device. The base station switches the wearable device from the direct connection path to an indirect path to access the network through the new relay device.

It can be seen that the wearable device needs to perform the process of switching from the indirect path to the direct path and the direct path to the indirect path during the process of performing the handover between the relay devices, which is complicated and wastes signaling and power.

Summary of the invention

The present invention provides a method for switching between remote devices and a switching device, which is used to solve the problem that the remote device switches between the relay devices is complicated and the signaling overhead is large.

The first aspect provides a method for the remote device to switch between the relay devices, where the remote device connects to the network through the first relay device, and if the network device is found to be connected to the first relay device during the network connection If the signal quality is lower than the set threshold, the switching between the relay devices is implemented by the following method. It is assumed that the remote device obtains the first identifier of the second relay device in advance, and the remote device sends a request message to the base station by using the first relay device, and the first identifier and the indication information are carried in the request message. And indicating, by the indication information, that the remote device switches between the relay devices; the request message is used to request the base station to switch the remote device from the first relay device to the network by using the first relay device The second relay device is connected to the network; the remote device receives the response message for the request message returned by the base station, and establishes a connection with the second relay device based on the response message, thereby implementing Switching to the network by the second relay device is switched by connecting the network through the first relay device. In this way, the process of the remote device is prevented from being complicated and wastes signaling and power when performing the process of switching between the relay devices. By directly switching between the two relay devices, the continuity of the service of the remote device is ensured, and the saving is saved. Signaling consumption and saving power consumption.

In a possible design, the request message further includes a second identifier of the second relay device camping cell, where the second identifier is used by the base station to determine a serving base station of the second relay device Whether it is the base station.

In a possible design, the second identifier is further configured to: when the second relay device is in an idle state, the core network device to which the second relay device belongs is located at the second relay device Paging in the reserved cell. This can save the paging of the network resources and radio resources of the second relay device.

In a possible design, after receiving the request message from the first relay device to the base station, the remote device receives a response message sent by the base station, and the remote device finds that the response message includes the And indicating, according to the indication information, the first mapping relationship to the second mapping relationship, where the first mapping relationship is a side link between the bearer identifier of the remote device and the first relay device. The mapping relationship of the bearer identifier, where the second mapping relationship is a mapping relationship between the bearer label of the remote device and the side link bearer identifier of the second relay device. By directly multiplexing the mapping relationships, it helps to speed up the switch.

The second aspect provides a method for the remote device to switch between the relay devices. The first base station receives the first request message sent by the remote device by using the first relay device, parses the first request message, and finds the first The first identifier of the second relay device carried in the request message and the indication information for identifying the handover between the relay devices, according to the first request message, the remote device is passed by the first relay The device connection network switches to connect to the network by the second relay device. In this way, the process of the remote device is prevented from being complicated and wastes signaling and power when performing the process of switching between the relay devices. By directly switching between the two relay devices, the continuity of the service of the remote device is ensured, and the saving is saved. Signaling consumption and saving power consumption.

In a possible design, the first request message further includes a second identifier of the second relay device camping cell; the second identifier is used by the first base station to determine the second relay Whether the serving base station of the device is the first base station.

In a possible design, the second identifier is further configured to: when the second relay device is in an idle state, the core network device to which the second relay device belongs is located in the second relay device. Paging in the reserved cell. This can save the paging of the network resources and radio resources of the second relay device.

In a possible design, the first base station switches the remote device from being connected to the network by the first relay device to the network connected by the second relay device according to the first request message. The method is as follows: the first base station sends a second request message to the first core network device, where the second request message carries: from the a first identifier of the second relay device received in a request message and indication information for identifying a handover between the relay devices; the indication information is used to indicate the first core network device: the far The end device will be switched by the first relay device connection network to be connected to the network by the second relay device; or the first base station sends the second request message to the first core network device, by The first core network device sends a third request message to the second core network device, where the third request message includes: the first identifier of the second relay device received from the second request message And indication information for identifying a handover between the relay devices; the indication information indicating the second core network device: the remote device is to be switched by the first relay device connection network to the second The relay device is connected to the network.

In a possible design, the first request message further includes a second identifier of the second relay device camping cell; if the first base station is according to the second relay device camping cell The second mapping determines that the serving base station of the second relay device is the first base station, and the first base station multiplexes the first mapping relationship to the second mapping relationship, where the first mapping relationship is: the remote end a mapping relationship between the bearer identifier of the device and the side link bearer identifier of the first relay device, where the second mapping relationship is a side chain between the bearer identifier of the remote device and the second relay device a mapping relationship of the path bearer identifiers; or, if the first base station determines that the serving base station of the second relay device is not the first base station according to the second identifier of the second relay device camping cell, The second request message further includes the first mapping relationship, where the second base station multiplexes the first mapping relationship to the second mapping relationship. By directly multiplexing the mapping relationships, it helps to speed up the switch.

The third aspect provides a method for the remote device to switch between the relay devices. The remote device connects to the network through the first relay device, and the signal quality between the first relay device and the first relay device is low during the connection between the networks. Sending a request message to the second relay device, where the request message carries an identifier of the remote device and indication information for identifying a handover between the relay devices, and is characterized by the indication information. The remote device switches between the relay devices; the request message is used to request the second relay device to initiate a request to the network, to connect the remote device by using the first relay device. The network switches to connect to the network by the second relay device. The remote device receives the response message sent by the base station, and establishes a connection with the second relay device based on the response message, so that the network is switched to the second relay device by connecting the network through the first relay device. Connect Network. In this way, the process of the remote device is prevented from being complicated and wastes signaling and power when performing the process of switching between the relay devices. By directly switching between the two relay devices, the continuity of the service of the remote device is ensured, and the saving is saved. Signaling consumption and saving power consumption. .

In a possible design, the response message includes indication information for identifying a handover between the relay devices, and after receiving the response message sent by the base station, the remote device multiplexes the first mapping according to the response message. The second mapping relationship is: the mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, where the second mapping relationship is The mapping relationship between the bearer label of the remote device and the side link bearer identifier of the second relay device is used to facilitate the switching by directly multiplexing the mapping relationship.

The fourth aspect provides a method for the remote device to switch between the relay devices, where the remote device connects to the network through the first relay device, and the second relay device receives the first request message sent by the remote device. The first request message includes: an identifier of the remote device and indication information for identifying a handover between the relay devices, where the second relay device sends the network to the network according to the first request message. A request is initiated to switch the remote device from being connected to the network by the first relay device to the network connected by the second relay device. In this way, the process of the remote device is prevented from being complicated and wastes signaling and power when performing the process of switching between the relay devices. By directly switching between the two relay devices, the continuity of the service of the remote device is ensured, and the saving is saved. Signaling consumption and saving power consumption.

In a possible design, if the core network device serving the first relay device is the first core network device, and the core network device serving the second relay device is the second core network device, the Two relay devices to the second core The network device sends a second request message, where the second request message includes: an identifier of the remote device received from the first request message, and indication information for identifying a handover between the relay devices; The second request message is used by the second core network device to send a third request message to the first core network device, where the third request message includes: the far received from the second request message The identifier of the end device and the indication information for identifying the handover between the relay devices, the indication information is used to indicate the first core network device: the remote device is to be switched by connecting the network through the first relay device Connecting to the network by the second relay device; or, if the first relay device serving the second relay device and the core network device serving the second relay device are both the first core network device, the second middle The device sends the second request message to the first core network device, where the second request message includes: an identifier of the remote device received from the first request message, and is used to identify Switching between relay devices Display information, the first indication information for indicating the core network device: the device will be switched to the distal end of said first relay device connected to the network by the second relay apparatus connected to the network.

The fifth aspect provides a method for the remote device to switch between the relay devices, where the remote device connects to the network through the first relay device, and the core network device that serves the first relay device is the first core. a network device, where the core network device serving the second relay device is the second core network device, and the second core network device receives the second request message sent by the second relay device after receiving the first request message. The second request message includes an identifier of the remote device and indication information for identifying a handover between the relay devices, where the second core network device sends a third request message to the first core network device. The third request message includes: an identifier of the remote device received from the second request message, and indication information for identifying a handover between the relay devices, where the indication information is used to indicate The first core network device: the remote device will be switched by the first relay device connection network to be connected to the network by the second relay device; if the first relay device and the service are served Two relay settings The core network device is the first core network device, and the first core network device receives the second request message sent by the second relay device after receiving the first request message, and the second request message The identifier of the remote device and the indication information for identifying the handover between the relay devices are included; the first core network device sends a fourth request message to the serving base station of the second relay device, where the The fourth request message is used to indicate the serving base station of the second relay device: the first mapping relationship is obtained, and the first mapping relationship is multiplexed to the second mapping relationship, where the first mapping relationship is: the remote device a mapping relationship between the bearer identifier and the side link bearer identifier of the first relay device, where the second mapping relationship is a side chain between the bearer label of the remote device and the second relay device The mapping relationship between the road bearer identifiers. In this way, the process of the remote device is prevented from being complicated and wastes signaling and power when performing the process of switching between the relay devices. By directly switching between the two relay devices, the continuity of the service of the remote device is ensured, and the saving is saved. Signaling consumption and saving power consumption. By directly multiplexing the mapping relationships, it helps to speed up the switch.

In a possible design, after the second core network device sends a third request message to the first core network device, the second core network device receives a response message returned by the first core network device, where The second core network device sends a fifth request message to the serving base station of the second relay device, where the fifth request message includes an identifier of the second relay device, and an identifier of the second relay device For indicating the serving base station: the remote device will switch to connect to the network by the second relay device.

In a sixth aspect, a switching apparatus is provided for use in a remote device having a function of implementing the behavior of the remote device in any of the possible aspects of the first aspect and the first aspect described above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the apparatus includes a transceiver and a processor, wherein the processor is used for tuning A set of programs is used to perform the methods described in the first aspect and any of the possible designs of the first aspect.

In a seventh aspect, a handover apparatus is provided for use in a first base station, the apparatus having the functionality to implement the behavior of the first base station in any of the possible aspects of the second aspect and the second aspect described above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the apparatus includes a transceiver and a processor, wherein the processor is configured to invoke a set of programs to perform as described in any of the possible designs of the second and second aspects above Methods.

In an eighth aspect, a switching apparatus is provided for use in a remote device having a function of implementing remote device behavior in any of the possible aspects of the third aspect and the third aspect described above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the apparatus includes a transceiver and a processor, wherein the processor is configured to invoke a set of programs to perform as described in any of the possible designs of the third and third aspects above Methods.

In a ninth aspect, a switching apparatus is provided for use in a second relay device having a function of implementing remote device behavior in any of the possible aspects of the fourth aspect and the fourth aspect described above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the apparatus includes a transceiver and a processor, wherein the processor is configured to invoke a set of programs to perform as described in any of the possible designs of the fourth and fourth aspects above Methods.

In a tenth aspect, a switching apparatus is provided for use in a second core network device, the apparatus having a function of implementing the behavior of the second core network device in any of the possible aspects of the fifth aspect and the fifth aspect. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the apparatus includes a transceiver and a processor, wherein the processor is configured to invoke a set of programs to perform as described in any of the possible designs of the fifth and fifth aspects above Methods.

In an eleventh aspect, a computer storage medium is provided for storing a computer program, the computer program comprising instructions for performing the methods of the various aspects.

According to a twelfth aspect, the embodiment of the present application provides a computer program product comprising instructions, which when executed on a computer, cause the computer to perform the method described in the above aspects.

DRAWINGS

1 is a structural diagram of a communication system in an embodiment of the present application;

2 is a schematic flowchart of a method for switching a remote device between relay devices according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of signaling interaction of a remote device switching between relay devices according to an embodiment of the present disclosure;

FIG. 4 is a second schematic diagram of signaling interaction of a remote device switching between relay devices according to an embodiment of the present disclosure;

FIG. 5 is a third schematic diagram of signaling interaction of a remote device switching between relay devices according to an embodiment of the present disclosure;

FIG. 6 is a second schematic flowchart of a method for switching a remote device between relay devices according to an embodiment of the present disclosure;

FIG. 7 is a fourth schematic flowchart of a method for switching a remote device between relay devices according to an embodiment of the present disclosure;

FIG. 8 is a fifth schematic flowchart of a method for switching a remote device between relay devices according to an embodiment of the present disclosure;

9 is a schematic flowchart of a method for switching a remote device between relay devices according to an embodiment of the present application;

10 to FIG. 14 are schematic structural diagrams of a switching device according to an embodiment of the present application;

FIG. 15 is a schematic structural diagram of a remote device according to an embodiment of the present application;

16 is a schematic structural diagram of a base station in an embodiment of the present application;

17 is a second schematic structural diagram of a remote device according to an embodiment of the present application;

FIG. 18 is a schematic structural diagram of a relay device according to an embodiment of the present application;

FIG. 19 is a schematic structural diagram of a core network device according to an embodiment of the present application.

detailed description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a structural diagram of a communication system according to an embodiment of the present application. The communication system includes a remote device 101, at least one relay device 102, at least one base station 103, and a core network 104. The core network 104 includes at least one mobility management entity (MME), a serving gateway (Serving GW, S-GW), a packet data gateway (PDN GW, P-GW), and a proximity service function entity (ProSe Function). , PF). Communication between the remote device 101 and the relay device 102 is through a PC5 link. The relay device 102 refers to a device that can assist the remote device 101 to access the network. When the remote device 101 accesses the network through the relay device 102, the relay device 102 can relay uplink and downlink data and signals for the remote device 101. make. The relay device 102 may be a device with higher performance than the remote device 101. For example, the remote device 101 may be a wearable device, and the relay device 102 may be a smart device such as a smart phone or a smart tablet. The remote device 101 can perform uplink and downlink communication with the base station 103 through a direct path or an indirect path. When the remote device 101 communicates with the base station 103 through the indirect path, the remote device 101 sends uplink and downlink data and signaling to the base station 103 through the relay device 102, and both the remote device 101 and the relay device 102 need to pass the data radio bearer. (Data Radio Bearer, DRB) performs uplink and downlink data communication with the base station 103. In order to distinguish the data packets of the remote device 101 and the relay device 102, the base station 103 allocates a layer 2 identity (ID) to the remote device 101 in advance. That is, the layer 2 ID or the L2 ID carries the L2 ID in the data packet of the remote device 101, and the L2 ID is used to distinguish the data packet from the relay device 102. The base station 103 allocates a corresponding side link bearer ID (SLBI) to an Evolved Packet System (EPS) bearer of the remote device 101. Among them, the EPS bearer is the entire bearer of the wearable device to the P-GW.

Based on the communication system architecture shown in FIG. 1 , a method and an apparatus for switching between remote devices provided by the remote device provided by the embodiments of the present application are specifically described below.

Assuming that the remote device is currently connected to the network through the first relay device, the remote device periodically checks the signal quality of the PC5 link with the first relay device, and if the remote device determines the relationship with the first relay device. If the signal quality of the PC5 link is lower than the threshold, the trigger is switched from connecting the network through the first relay device to connecting to the network through the second relay device. The specific conversion method is as shown in FIG. 2 or FIG. 6. 2 is a remote device initiating a handover request by using a first relay device, and FIG. 6 is a remote device initiating a handover request by using a second relay device. In the following description, the core network device may be an MME or other entity having mobility management functions.

Step 201: The remote device connects to the network through the first relay device.

Step 202: The remote device acquires a first identifier of the second relay device.

Step 203: The remote device sends a first request message to the first base station by using the first relay device, where the first base station receives the first request message sent by the remote device by using the first relay device.

The first base station is a serving base station of the first relay device, and if the serving core network devices of the first relay device and the second relay device are both the first core network device, step 204a is performed; Service core network equipment is the first core The heart network device, the service core network device of the second relay device is the second core network device, and step 204b is performed.

The first request message includes a first identifier and indication information, where the indication information is used to indicate that the remote device switches between the relay devices, and the first request message is used to request the base station to connect the remote device by using the first relay device. The network switches to connect to the network through the second relay device.

Optionally, the first request message further includes a second identifier of the second relay device camping cell, where the second identifier is used by the first base station to determine whether the serving base station of the second relay device is the first base station.

After the first base station receives the first request message sent by the remote device by using the first relay device, if the first base station determines, according to the second identifier of the second relay device, the serving base station of the second relay device is the first The base station, the first base station multiplexes the first mapping relationship to the second mapping relationship, where the first mapping relationship is: a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier between the first relay device, and the second mapping The relationship is a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier between the second relay device;

If the first base station determines that the serving base station of the second relay device is not the first base station according to the second identifier of the second relay device camping cell, the second request message sent in the following step 204a or step 204b carries the foregoing A mapping relationship is used by the second base station to multiplex the first mapping relationship to the second mapping relationship.

The bearer identifier of the remote device may be an EPS bearer ID in the 4G, or may be a quality of service flow (QoS ID) in the 5G, which is not limited in this embodiment.

After receiving the first request message, the first base station switches the remote device from the first relay device connection network to the second relay device to connect to the network according to the first request message. Specifically, it is achieved by the following steps.

Step 204: The first base station sends a second request message to the first core network device.

The second request message includes: a first identifier of the second relay device received from the first request message, and indication information for identifying a handover between the relay devices; the indication information is used to indicate the first core network device : The remote device will switch from connecting to the network through the first relay device to the network through the second relay device.

Optionally, the second request message further includes: a second identifier of the second relay device camped cell received from the first request message.

The second identifier is configured to: when the second relay device is in an idle state, the first core network device performs paging in the second relay device camping cell. This can save the paging of the network resources and radio resources of the second relay device.

Optionally, the second request message further includes: a mapping relationship between the bearer identifier of the remote device received from the first request message and the side link bearer identifier between the first relay device.

Step 204b: The first base station sends a second request message to the first core network device, and the first core network device sends a third request message to the second core network device.

The third request message includes: a first identifier of the second relay device received from the second request message and indication information for identifying a handover between the relay devices; the indication information indicates the second core network device: the remote end The device will switch from connecting to the network through the first relay device to the network through the second relay device.

Optionally, the third request message further includes: a first mapping relationship received from the second request message, where the first mapping relationship is a bearer identifier of the remote device and a side link bearer identifier between the first relay device. Mapping relationship.

Optionally, the third request message further includes: a second identifier of the second relay device camped cell received from the second request message. The second identifier is configured to: when the second relay device is in an idle state, the second core network device performs paging in the second relay device camping cell. This can save the paging of the network resources of the second relay device.

Step 205: The first base station returns a response message for the first request message to the remote device, where the remote device receives the response message sent by the base station for the first request message.

The response message includes the foregoing indication information, and the remote device may multiplex the first mapping relationship to the second mapping relationship according to the indication information, where the first mapping relationship is a side link between the bearer identifier of the remote device and the first relay device. A mapping relationship between the bearer identifier and the second mapping relationship is a mapping relationship between the bearer label of the remote device and the side link bearer identifier between the second relay device.

Step 206: The remote device establishes a connection with the second relay device based on the received response message.

That is, switching is made by connecting the network through the first relay device to connecting to the network through the second relay device.

The method of the embodiment shown in FIG. 2 is further introduced in detail according to the specific application scenario 1 to application scenario 3.

Application scenario 1: The first relay device is the same as the serving base station of the second relay device, and is the first base station, and the service core network devices of the first relay device and the second relay device are also the same, and are the first core network. device. The specific signaling interaction process is shown in Figure 3.

Step 301: The second relay device broadcasts a discovery message, and the remote device receives the discovery message.

The discovery message includes an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) E-UTRAN global identifier (ECGI) of the evolved second camping device. The discovery message also includes a Global Unique Temporary Identity (GUTI) assigned by the core network device to the second relay device.

The remote device acquires the ECGI of the currently camped cell of the second relay device and the GUTI of the second relay device included in the discovery message.

Step 302: The remote device sends a first request message to the first base station by using the first relay device.

The first request message may also be referred to as a first handover request (HO request). The first request message includes indication information. The indication information may also be referred to as a relay switch indication (Relay Switch Indication), for indicating that the request message is used for requesting handover between the relay devices. Optionally, the first request message further includes an ECGI of the currently camped cell of the second relay device and a GUTI of the second relay device.

Step 303: The first base station sends a second request message to the first core network device.

The second request message can also be the second handover request. The second request message includes indication information obtained from the first request message.

The second request message may further include an identifier of the remote device, where the identifier of the remote device is allocated by the first base station to the remote device.

The second request message may further include a GUTI of the second relay device and an ECGI of the cell currently camped by the second relay device.

Step 304: The first core network device authenticates and authorizes whether the remote device accesses the network through the second relay device.

Specifically, the first core network device determines, according to the indication information, that the remote device needs to access the network through the second relay device. The first core network device obtains an International Mobile Subscriber Identity (IMSI) of the remote device according to the identifier allocated by the first base station for the remote device, and obtains the second relay device according to the GUTI of the second relay device. IMSI. The first core network device performs authentication and authorization on whether the remote device accesses the network through the second relay device according to the IMSI of the remote device and the IMSI of the second relay device, and if the authentication and authorization are passed, the following is performed. step.

Optionally, if the second relay device is in the idle state, perform steps 305-310; otherwise, perform step 311 directly.

Step 305: The first core network device queries, according to the IMSI of the second relay device, that the second relay device is in an idle state, and determines, according to the ECGI of the currently camped cell of the second relay device, the current serving base station of the second relay device. In the application scenario 1, the current serving base station of the second relay device is the first base station. The first core network device sends a paging message to the first base station, and the paging message carries the paging ID of the second relay device and the ECGI of the currently camped cell of the second relay device. The paging ID of the second relay device may be an EPS system temporary mobile subscriber identity (EPS TMSI, S-TMSI) allocated by the core network device, or an IMSI of the second relay device.

Step 306: The first base station determines, according to the ECGI in the Paging message, that the second relay device is currently in the cell, and then pages the second relay device in the cell range.

Step 307: After receiving the paging message, the second relay device sends a service request to the first core network device.

Step 308: The first core network device sends an initial context setup request (Initial Context Setup Request) to the first base station.

The initial context setting request includes a context of the second relay device, such as an EPS bearer ID, a QoS, an S-GW address, and the like.

Step 309: The first base station establishes a context of the second relay device, and establishes an RB with the second relay device.

Step 310: The first base station sends an initial context setup complete (Initial Context Setup Complete) to the first core network device.

Step 311: The first core network device returns a handover request response message (Handover Request ack) to the first base station.

The handover request response message indicates that the first base station can switch the remote device to the second relay device, and the handover request response message includes an identifier that is allocated by the first base station to the second relay device, where the identifier is used to indicate the remote end of the first base station. The relay device to which the device is to be switched is the second relay device.

Step 312: The first base station multiplexes the first mapping relationship to the second mapping relationship, and allocates a new L2 ID to the remote device, and establishes a bearer identifier corresponding to the L2 ID of the remote device and a side link bearer of the second relay device. The mapping relationship of the identity.

The first mapping relationship is a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, where the second mapping relationship is the side link between the bearer identifier of the remote device and the second relay device. The mapping relationship of the bearer identifier.

For example, the first mapping relationship is a mapping relationship between the EPS bearer ID of the remote device and the SLBI between the first relay device, and the second mapping relationship is a mapping between the EPS bearer ID of the remote device and the SLBI between the second relay device. The mapping between the EPS bearer ID corresponding to the L2 ID of the remote device and the DRB ID of the second relay device is established by assigning a new L2 ID to the remote device.

Step 313: The first base station sends an RRC Connection Reconfiguration (RRC Conreconf) message to the second relay device, and the second relay device returns an RRC Connection Complete message.

The RRC connection reconfiguration message is used to notify the second relay device that it is a relay device of the remote device.

The RRC connection reconfiguration message may further include an L2 ID of the remote device, a mapping relationship between the EPS bearer ID of the remote device and the SLBI of the second relay device, an EPS bearer ID corresponding to the L2 ID of the remote device, and the second middle Following the mapping relationship of the DRB ID of the device.

Step 313b: The first base station sends the RRC connection reconfiguration message to the first relay device, to notify the first relay device to delete the related configuration that is relayed to the remote device.

The execution sequence of step 313a and step 313b is not limited herein, or step 313a and step 313b may be performed in parallel.

And the first base station sends an RRC connection reconfiguration message to the remote device, to notify the remote device to switch to the second relay device. The first base station carries the following at least one type of information in the RRC connection reconfiguration message sent to the remote device: the indication information, the related configuration of the side link bearer identifier between the remote device and the second relay device, and the remote device The mapping relationship between the L2 ID, the EPS bearer ID of the remote device, and the side link bearer identifier between the second relay device. The indication information is used to notify the remote device that the RRC connection reconfiguration message is used to implement handover between the relay devices. If the mapping relationship between the EPS bearer ID of the remote device and the side link bearer identifier of the second relay device does not change, the first base station does not carry the mapping relationship in the RRC connection reconfiguration message sent to the remote device. .

Step 314: The remote device sends an indirect connection release (Direct Link Release) message to the first relay device, where the first relay device disconnects the PC5 connection with the first relay device, and the first relay device returns an indirect connection release to the remote device. Response response.

Step 315: The remote device multiplexes the first mapping relationship to the second mapping relationship, where the first mapping relationship is: mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, and the second mapping The relationship is a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier between the second relay device.

Step 316: The remote device establishes a PC5 connection with the second relay device.

Step 317: The remote device sends an RRC Connection Reconfiguration Complete (RRC Connection Reconfiguration Complete) message to the first base station, to notify the first base station that the handover is complete.

Through the above description, in the application scenario, the above method can save the signaling consumption of the remote device switching between the relay devices, and the remote device switches to another indirect path through an indirect path, and the remote device during the handover process The connection is not disconnected, and the base station is connected through the indirect path to ensure the continuity of the service of the remote device. Moreover, the paging of the second relay device to the specific cell under the designated base station by the core network device saves the paging of the network resource of the second relay device.

Application scenario 2: the serving base station of the first relay device is the first base station, and the serving base station of the second relay device is the second base station, and the serving core network devices of the first relay device and the second relay device are also the same. The first core network device, the specific signaling interaction process is shown in FIG. 4 .

Steps 401 to 402 are the same as steps 301 to 302, and the repeated descriptions are not described herein again.

Step 403: The first base station sends a second request message to the first core network device.

In addition, the first base station determines that the serving base station of the second relay device is not the first base station according to the ECGI of the currently camped cell of the second relay device, and therefore, the first base station sends the second request message to the first core network device. Also included is a source to target container that includes the context of the remote device in the first base station.

Since the serving base stations of the first relay device and the second relay device are different, the context of the remote device needs to be forwarded to the second base station by the core network device.

Step 404: The first core network device authenticates and authorizes whether the remote device accesses the network through the second relay device. The specific process is the same as step 304, and details are not described herein again.

Optionally, if the second relay device is in the idle state, perform steps 405-410; otherwise, perform step 411 directly.

Step 405: The first core network device queries, according to the IMSI of the second relay device, that the second relay device is in an idle state, and determines, according to the ECGI of the currently camped cell of the second relay device, the current serving base station of the second relay device. In application scenario 2, the current serving base station of the second relay device is the second base station. The first core network device only sends a paging message to the second base station, where the paging message carries the paging ID of the second relay device and the ECGI of the currently camped cell of the second relay device. The paging ID of the second relay device may be an EPS system temporary mobile subscriber identity (EPS TMSI, S-TMSI) allocated by the core network device, or an IMSI of the second relay device.

Step 406: The second base station determines, according to the ECGI in the Paging message, that the second relay device is currently in the cell, and then pages the second relay device in the cell range.

Step 407: After receiving the paging message, the second relay device returns a service request to the first core network device.

Step 408: The first core network device sends an initial context setup request (Initial Context Setup Request) to the second base station.

Step 409: The second base station establishes a context of the second relay device, and establishes an RB with the second relay device.

Step 410: The second base station sends an initial context setup complete (Initial Context Setup Complete) to the first core network device.

Step 411: The first core network device returns a handover request message (Handover Request) to the second base station.

The handover request response message indicates that the second base station can switch the remote device to the second relay device, and the handover request response message includes the identifier allocated by the first core network device for the remote device, and the second base station allocates the identifier for the second relay device. Logo. The handover request response message may also include a Source to target container. The handover request response message may also include indication information. The identifier allocated by the second base station to the second relay device is used to indicate that the second relay device switches to the handover between the relay devices instead of switching from the indirect path to the direct path (ie, the remote device from the indirect path) Connect the network to switch to the direct path connection network).

Step 412: The second base station multiplexes the first mapping relationship to the second mapping relationship according to the context of the remote device in the Source to Target Container, where the first mapping relationship is between the EPS bearer ID of the remote device and the first relay device. The mapping relationship between the SLBI and the second mapping relationship is the mapping relationship between the EPS bearer ID of the remote device and the SLBI between the second relay devices. The second base station allocates a new L2 ID to the remote device, and establishes a mapping relationship between the EPS bearer ID corresponding to the L2 ID of the remote device and the DRB ID of the second relay device.

Step 413: The second base station sends an RRC Connection Reconfiguration (RRC Conreconf) message to the second relay device, and the second relay device returns an RRC Connection Complete message.

The RRC ConReconf is used to notify the second relay device that it is a relay device of the remote device.

Step 414: The second base station sends a handover request response (HO request ack) to the first core network device, to notify the first core network device that the handover preparation is complete, and the remote device can access the network through the second relay device.

The HO request ack includes a Target to source container, and the container includes an L2 ID assigned by the second base station to the remote device, and a mapping relationship between the EPS bearer ID of the remote device and the SLBI between the second relay device.

Step 415: The first core network device sends a handover command (HO Command) to the first base station, and notifies the first base station that the handover preparation for the remote device has been completed.

The switch command includes a Target to source container.

Step 416: The first base station sends an RRC connection reconfiguration message to the first relay device, to notify the first relay device to delete the related configuration that is relayed to the remote device.

Step 416b: The first base station sends an RRC connection reconfiguration message to the remote device, to notify the remote device to switch to the second relay device.

The first base station may carry at least one of the following information in the RRC connection reconfiguration message sent to the remote device: the indication information, the related configuration of the side link bearer identifier between the remote device and the second relay device, and the remote device The mapping relationship between the L2 ID, the EPS bearer ID of the remote device, and the side link bearer identifier between the second relay devices. The indication information is used to notify the remote device that the RRC connection reconfiguration message is used to implement handover between the relay devices. If the mapping relationship between the EPS bearer ID of the remote device and the side link bearer identifier of the second relay device does not change, the first base station does not carry the mapping relationship in the RRC connection reconfiguration message sent to the remote device. .

The order of execution of steps 416a and 416b is not limited herein, or steps 416a and 416b may be performed in parallel.

Step 417: The remote device sends an indirect connection release (Direct Link Release) message to the first relay device, where the first relay device disconnects the PC5 connection with the first relay device, and the first relay device returns an indirect connection release to the remote device. Response response.

Step 418: The remote device multiplexes the first mapping relationship to the second mapping relationship, where the first mapping relationship is: mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, and the second mapping The relationship is a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier between the second relay device.

Step 419: The remote device establishes a PC5 connection with the second relay device.

Step 420: The remote device sends an RRC Connection Reconfiguration Complete (RRC Connection Reconfiguration Complete) message to the second base station, to notify the second base station that the handover is complete.

Through the above description, in the application scenario 2, the above method can save the signaling consumption of the remote device switching between the relay devices, and the remote device switches to another indirect path through an indirect path, and the remote device is in the process of switching. The device is not disconnected, and the base station is connected through an indirect path to ensure the continuity of the remote device service. Moreover, the paging of the second relay device to the specific cell under the designated base station by the core network device saves the paging of the network resource of the second relay device.

Application scenario 3: the serving base station of the first relay device is the first base station, the serving base station of the second relay device is the second base station, and the serving core network device of the first relay device is the first core network device, and the second The service core network device of the device is the second core network device. The specific signaling interaction process is shown in Figure 5.

Steps 501 to 503 are the same as steps 401 to 403, and the repeated descriptions are not described herein again.

Step 504: The first core network device sends a third request message to the second core network device.

Specifically, the first core network device obtains the IMSI of the remote device from the second request message, and determines that the serving core network device of the second relay device is not the first core network device according to the GUTI of the second relay device, and then The core network device sends a third request message to the second core network device according to the GUTI of the second relay device, where the third request message is included in the packet At least one of the following: the indication information obtained from the second request message, the IMSI of the remote device, the GUTI of the second relay device, the ECGI currently hosted by the second relay device, the Source to target container, the first core The context of the remote device within the network device.

Step 505: The second core network device authenticates and authorizes whether the remote device accesses the network through the second relay device.

Specifically, the second core network device determines, according to the indication information, that the remote device needs to access the network through the second relay device, and determines the IMSI of the second relay device according to the GUTI of the second relay device, according to the IMSI of the remote device. And the IMSI of the second relay device, whether the remote device can access the network through the second relay device for authentication and authorization, and if the authentication and authorization are passed, the subsequent steps are performed.

Optionally, if the second relay device is in the idle state, perform steps 506-511; otherwise, perform step 512 directly.

Step 506: The second core network device queries, according to the IMSI of the second relay device, that the second relay device is in an idle state, and determines, according to the ECGI of the currently camped cell of the second relay device, the current serving base station of the second relay device. In the application scenario 3, the current serving base station of the second relay device is the second base station. The second core network device only sends a paging message to the second base station, where the paging message carries the paging ID of the second relay device and the ECGI of the currently camped cell of the second relay device. The paging ID of the second relay device may be an EPS system temporary mobile subscriber identity (EPS TMSI, S-TMSI) allocated by the core network device, or an IMSI of the second relay device.

Step 507: The second base station determines, according to the ECGI in the Paging message, that the second relay device is currently in the cell, and then pages the second relay device in the cell range.

Step 508: After receiving the paging message, the second relay device returns a service request to the second core network device.

Step 509: The second core network device sends an initial context setup request (Initial Context Setup Request) to the second base station.

The Initial Context Setup Request includes the context of the second relay device, such as an EPS bearer ID, a QoS, and an S-GW address.

Step 510: The second base station establishes a context of the second relay device, and establishes an RB with the second relay device.

Step 511: The second base station sends an initial context setup complete (Initial Context Setup Complete) to the second core network device.

Step 512: The second core network device returns a handover request message (Handover Request) to the second base station.

The Handover Request includes an identifier assigned by the second core network device to the remote device, an identifier assigned by the second base station to the second relay device, and a Source to Target Container, where the container includes the remote device context.

The Handover Request may further include indication information, where the indication information is used to indicate that the second relay device switches to the handover between the relay devices instead of switching from the indirect path to the direct path (that is, the remote device switches from the indirect path connection network) Connect to the network directly.)

The identifier assigned by the second base station to the second relay device is also used to indicate that the second relay device switches to the handover between the relay devices instead of switching from the indirect path to the direct path (ie, the remote device connects from the indirect path). The network switches to the direct path connection network).

Step 513: The second base station multiplexes the first mapping relationship to the second mapping relationship according to the remote device context in the Source to Target Container, where the first mapping relationship is between the EPS bearer ID of the remote device and the first relay device. The mapping relationship between the SLBI and the second mapping relationship is the mapping relationship between the EPS bearer ID of the remote device and the SLBI between the second relay device. The second base station allocates a new L2 ID to the remote device, and establishes a mapping relationship between the EPS bearer ID corresponding to the L2 ID of the remote device and the DRB ID of the second relay device.

Step 514: The second base station sends an RRC connection reconfiguration message to the second relay device, and the second relay device returns an RRC Connection Complete message.

Step 515: The second base station sends a handover request response (HO request ack) to the second core network device, to notify the second core network device that the handover preparation is completed, and the remote device can access the network through the second relay device.

Step 516: The second core network device sends a Forward Relocation Response to the first core network device, and carries a Target to source container in the Forward Relocation Response.

Step 517: The first core network device sends a handover command (HO Command) to the first base station, and notifies the first base station that the handover preparation for the remote device has been completed.

The switch command includes a Target to source container.

Step 518a: The first base station sends an RRC connection reconfiguration message to the first relay device, to notify the first relay device to delete the related configuration that is relayed to the remote device.

Step 518b: The first base station sends an RRC connection reconfiguration message to the remote device, to notify the remote device to switch to the second relay device.

The order of execution of step 518a and step 518b is not limited herein, or step 518a and step 518b may be performed in parallel.

Step 519: The remote device sends an indirect connection release (Direct Link Release) message to the first relay device, where the first relay device disconnects the PC5 connection with the first relay device, and the first relay device returns an indirect connection release to the remote device. Response response.

Step 520: The remote device multiplexes the first mapping relationship to the second mapping relationship, where the first mapping relationship is: mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, and the second mapping The relationship is a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier between the second relay device.

Step 521: The remote device establishes a PC5 connection with the second relay device.

Step 522: The remote device sends an RRC connection reconfiguration complete message to the second base station, to notify the second base station that the handover is complete.

With the above description, in the application scenario 3, the first relay device is different from the serving base station and the serving core network device of the second relay device. Therefore, the context of the remote device needs to pass through the first core network device from the first base station. The second core network device is passed to the second base station. The above method can save the signaling consumption of the remote device switching between the relay devices. Moreover, the remote device switches to another indirect path through an indirect path, and the remote device does not disconnect during the handover process, and maintains the connection to the base station through the indirect path, thereby ensuring service continuity of the remote device. Moreover, the paging of the second relay device to the specific cell under the designated base station by the core network device saves the paging of the network resource of the second relay device.

As shown in FIG. 6, the remote device may also initiate a handover request by using the second relay device, as described in the following steps.

Step 601: The remote device connects to the network by using the first relay device.

Step 602: The remote device sends a first request message to the second relay device, where the second relay device receives the first request message sent by the remote device.

The first request message includes: an identifier of the remote device and indication information for identifying a handover between the relay devices; the first request message is used to request the second relay device to initiate a request to the network to remotely The device switches from connecting to the network through the first relay device to the network through the second relay device.

After receiving the first request message, the second relay device sends a request to the network according to the first request message, where the request is used to switch the remote device from the first relay device to the network through the second relay device. Connect Network.

Specifically, if the serving base station of the first relay device is the first base station, and the serving base station of the second relay device is the second base station, the core network device serving the first relay device is the first core network device, and the service is second. If the core network device of the relay device is the second core network device, step 603a to step 611a are performed; if the core network device serving the first relay device and the second relay device is the first core network device, executing Step 603b to step 607b.

Step 603a: The second relay device sends a second request message to the second core network device, where the second core network device receives the second request message sent by the second relay device.

The second request message includes: an identifier of the remote device received from the first request message and indication information for identifying a handover between the relay devices.

Step 604a: The second core network device sends a third request message to the first core network device, where the second core network device receives the third request message sent by the first core network device.

The third request message includes: an identifier of the remote device received from the second request message, and indication information for identifying a handover between the relay devices, where the indication information is used to indicate the first core network device: the remote device is to be The network is switched by the first relay device to connect to the network through the second relay device.

Step 605a: The first core network device sends a context request message to the first base station, where the first base station receives the context request message sent by the first core network device.

The context request message includes an identifier for the S1 interface allocated by the first base station to the remote device.

Step 606a: The first base station returns a context response message to the first core network device.

The context response message includes an identifier for the S1 interface allocated by the first core network device for the remote device, and context information of the remote device at the first base station.

Step 607a: The first core network device sends a response message of the third request message to the second core network device, where the second core network device receives the response message sent by the first core network device.

The response message of the third request message includes the identifier of the remote device, the context information of the remote device on the first core network device, and the context information of the remote device at the first base station.

Step 608a: The second core network device sends a response message of the second request message to the second base station, and the second base station receives the response message of the second request message sent by the second core network device.

The response message of the second request message includes the context information of the remote device at the first base station, the identifier for the S1 interface allocated by the second core network device for the remote device, and the second base station allocated for the second relay device. For the identifier of the S1 interface, the identifier for the S1 interface allocated by the second base station to the second relay device is used to notify the second relay device: the remote end The device will switch to the network connected by the second relay device.

Step 609a: The second base station multiplexes the first mapping relationship to the second mapping relationship.

The first mapping relationship is: a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, where the second mapping relationship is the side between the bearer label of the remote device and the second relay device. The mapping relationship between the link bearer identifiers.

Step 610a: The first base station sends a response message to the remote device, for example, the response message is a reconfiguration message, and the remote device receives the response message sent by the first base station.

The reconfiguration message includes indication information for identifying a handover between the relay devices.

The remote device multiplexes the first mapping relationship to the second mapping relationship according to the reconfiguration message, where the first mapping relationship is: a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier between the first relay device, and second The mapping relationship is a mapping relationship between the bearer label of the remote device and the side link bearer identifier between the second relay device.

Step 611a: The remote device establishes a connection with the second relay device based on the received response message.

Step 603b: The second relay device sends a second request message to the first core network device, where the first core network device receives the second request message sent by the second relay device.

The second request message includes: an identifier of the remote device received from the first request message and indication information for identifying a handover between the relay devices, where the indication information is used to indicate the first core network device: the remote device is to be Switching to the network through the first relay device to the network through the second relay device

Step 604b: The first core network device sends a fourth request message to the serving base station of the second relay device, and the serving base station of the second relay device receives the fourth request message sent by the first core network device.

The fourth request message is used to indicate the serving base station of the second relay device: the first mapping relationship is obtained, and the first mapping relationship is multiplexed to the second mapping relationship, where the first mapping relationship is: the bearer identifier of the remote device and the first middle The second mapping relationship is a mapping relationship between the bearer label of the remote device and the side link bearer identifier between the second relay device.

If the serving base station of the first relay device and the second relay device are both the first base station, the fourth request message includes the identifier allocated by the first base station for the remote device, and the first base station is allocated for the second relay device. Identification

If the serving base station of the first relay device is the first base station, and the serving base station of the second relay device is the second base station, the fourth request message includes the identifier allocated by the first base station to the remote device, and the first base station is the first base station. The identifier assigned by the second relay device and the identifier of the first base station. Further, after the second base station receives the fourth request message sent by the first core network device, the second base station sends a context request message to the first base station according to the identifier of the first base station in the fourth request message, and the first base station receives the first request message. The context request message sent by the second base station returns a context response message to the second base station. The context request message may include an identifier for the S1 interface allocated by the first base station for the remote device, and an identifier for the X2 interface allocated by the second base station to the remote device, obtained from the fourth request message. The context response message may include an identifier for the X2 interface allocated by the first base station for the remote device, an identifier for the X2 interface allocated by the second base station for the remote device, and context information of the remote device.

Step 605b: The serving base station of the second relay device multiplexes the first mapping relationship to the second mapping relationship.

Step 606b: The first base station sends a response message to the remote device, for example, the response message is a reconfiguration message, and the remote device receives the response message sent by the first base station.

The response message includes indication information for identifying a handover between the relay devices.

The remote device multiplexes the first mapping relationship to the second mapping relationship according to the reconfiguration message, where the first mapping relationship is: A mapping relationship between the bearer identifier of the device and the side link bearer identifier of the first relay device, where the second mapping relationship is a mapping relationship between the bearer label of the remote device and the side link bearer identifier of the second relay device.

Step 607b: The remote device establishes a connection with the second relay device based on the received response message.

The method of the embodiment shown in FIG. 6 is further introduced in detail according to the specific application scenario 1 to application scenario 3.

Application scenario 4: The first relay device is the same as the serving base station of the second relay device, and is the first base station, and the serving core network device of the first relay device and the second relay device are also the same, and is the first core network. device. The specific signaling interaction process is shown in Figure 7.

Step 701: The second relay device broadcasts a discovery message, and the remote device receives the discovery message.

The discovery message includes an ECGI of a cell currently camped by the second relay device, and the discovery message further includes a GUTI allocated by the core network device to the second relay device.

Step 702: The remote device sends a first request message to the second relay device.

Step 703: The second relay device sends a second request message to the first core network device, where the first core network device receives the second request message sent by the second relay device.

The second request message may be a service request, where the service request includes the indication information obtained from the first request message and the GUTI of the remote device. The indication information is used to indicate that the service request is initiated to provide a relay service to the remote device.

Step 704: The first core network device authenticates and authorizes whether the remote device accesses the network through the second relay device.

Specifically, the first core network device determines, according to the indication information, that the remote device needs to access the network through the second relay device, and determines the IMSI of the second relay device according to the GUTI of the second relay device, according to the IMSI of the remote device. And the IMSI of the second relay device, whether the remote device can access the network through the second relay device for authentication and authorization, and if the authentication and authorization are passed, the subsequent steps are performed.

Optionally, if the second relay device is in an idle state, steps 705-707 are performed; otherwise, step 708 is performed.

Step 705: The first core network device sends an initial context setup request (Initial Context Setup Request) to the first base station.

Step 706: The first base station establishes a context of the second relay device, and establishes an RB with the second relay device.

Step 707: The first base station sends an initial context setup complete (Initial Context Setup Complete) to the first core network device.

Step 708: The first core network device returns a handover request message (Handover Request) to the first base station.

The Handover Request includes an identifier for the S1 interface allocated by the first base station for the second relay device, and an identifier for the S1 interface allocated by the first base station to the remote device.

Step 709: The first base station multiplexes the first mapping relationship to the second mapping relationship according to the identifier used by the first base station for the second relay device for the S1 interface, where the first mapping relationship is the EPS bearer ID of the remote device. The mapping relationship between the first relay device and the SLBI, and the second mapping relationship is a mapping relationship between the EPS bearer ID of the remote device and the SLBI between the second relay devices. The first base station allocates a new L2 ID to the remote device, and establishes a mapping relationship between the EPS bearer ID corresponding to the L2 ID of the remote device and the DRB ID of the second relay device.

Step 710: The first base station sends an RRC connection reconfiguration message to the second relay device, and the second relay device returns an RRC Connection Complete message.

Step 711a: The first base station sends an RRC connection reconfiguration message to the first relay device, to notify the first relay device to delete the related configuration that is relayed to the remote device.

Step 711b: The first base station sends an RRC connection reconfiguration message to the remote device, to notify the remote device to switch to the second relay device.

The execution sequence of step 711a and step 711b is not limited herein, or step 711a and step 711b may be performed in parallel.

Step 712: The remote device sends an indirect connection release (Direct Link Release) message to the first relay device, where the first relay device disconnects the PC5 connection with the first relay device, and the first relay device returns an indirect connection release to the remote device. Response response.

Step 713: The remote device multiplexes the first mapping relationship to the second mapping relationship, where the first mapping relationship is: mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, and the second mapping The relationship is a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier between the second relay device.

Step 714: The remote device establishes a PC5 connection with the second relay device.

Step 715: The remote device sends an RRC connection reconfiguration complete message to the first base station, to notify the first base station that the handover is complete.

Step 716: The first base station sends a handover complete message to the first core network device, to notify the first core network device that the handover is complete.

Through the above description, in the application scenario 4, the above method can save the signaling consumption of the remote device switching between the relay devices, and the remote device switches to another indirect path through an indirect path, and the remote end is in the process of switching. The device is not disconnected, and the base station is connected through an indirect path to ensure the continuity of the remote device service.

Application scenario 5: the serving base station of the first relay device is the first base station, and the serving base station of the second relay device is the second The base station, the first relay device, and the service core network device of the second relay device are all the first core network devices. The specific signaling interaction process is shown in Figure 8.

Steps 801 to 804 are the same as steps 701 to 704, and the details are not described again.

Optionally, if the second relay device is in an idle state, perform steps 805-807; otherwise, perform step 808.

Step 805: The first core network device sends an initial context setup request (Initial Context Setup Request) to the second base station.

Step 806: The second base station establishes a context of the second relay device, and establishes an RB with the second relay device.

Step 807: The second base station sends an initial context setup complete (Initial Context Setup Complete) to the first core network device.

Step 808: The first core network device returns a handover request message (Handover Request) to the second base station.

The Handover Request includes an identifier for the S1 interface allocated by the first base station for the second relay device, an identifier for the S1 interface allocated by the first base station for the remote device, and an identifier of the first base station.

Step 809: The second base station sends a context request message to the first base station according to the identifier of the first base station.

The context request message includes an identifier for the S1 interface allocated by the first base station for the remote device, and an identifier for the X2 interface allocated by the second base station to the remote device. Optionally, the context request message includes an S1-AP ID Indication. It should be noted that the context request message is sent on the X2 interface between the base stations, and the identifier used by the first base station for the remote device to be used for the X2 interface should be used, but the first base station has not allocated the identifier yet. In order for the first base station to identify the remote device, the identity assigned by the first base station to the remote device for the S1 interface is used in the context request message.

Step 810: The first base station returns a context response message to the second base station.

The context response message includes an identifier for the X2 interface allocated by the first base station for the remote device, an identifier for the X2 interface allocated by the second base station for the remote device, and context information of the remote device.

Step 811: The second base station multiplexes the first mapping relationship to the second mapping relationship according to the context information of the remote device, where the first mapping relationship is a mapping relationship between the EPS bearer ID of the remote device and the SLBI between the first relay device. The second mapping relationship is a mapping relationship between the EPS bearer ID of the remote device and the SLBI between the second relay devices. The second base station allocates a new L2 ID to the remote device, and establishes a mapping relationship between the EPS bearer ID corresponding to the L2 ID of the remote device and the DRB ID of the second relay device.

Step 812: The second base station sends an RRC connection reconfiguration message to the second relay device, and the second relay device returns an RRC Connection Complete message.

The RRC connection reconfiguration message is used to notify the second relay device of the configuration for relaying the remote device.

Step 813: The second base station sends a context response acknowledgement message (Context Response Ack) to the first base station.

The context response confirmation message includes a target to source container, where the container includes the L2 ID of the remote device, the mapping relationship between the EPS bearer ID of the remote device and the SLBI between the second relay device.

Step 814a: The first base station sends an RRC connection reconfiguration message to the first relay device, where the first relay device is notified. Delete the related configuration for the remote device relay.

Step 814b: The first base station sends an RRC connection reconfiguration message to the remote device, to notify the remote device to switch to the second relay device.

The order of execution of steps 814a and 814b is not limited herein, or steps 814a and 814b may be performed in parallel.

Step 815: The remote device sends an indirect connection release (Direct Link Release) message to the first relay device, where the first relay device disconnects the PC5 connection with the first relay device, and the first relay device returns an indirect connection release to the remote device. Response response.

Step 816: The remote device multiplexes the first mapping relationship to the second mapping relationship, where the first mapping relationship is: mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, and the second mapping The relationship is a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier between the second relay device.

Step 817: The remote device establishes a PC5 connection with the second relay device.

Step 818: The remote device sends an RRC connection reconfiguration complete message to the first base station, to notify the first base station that the handover is complete.

Step 819: The first base station sends a handover complete message to the first core network device, to notify the first core network device that the handover is complete.

With the above description, in the application scenario 5, the first relay device is different from the serving base station of the second relay device, and therefore the second base station requests the first base station for the context information of the remote device. The above method can save the signaling consumption of the remote device switching between the relay devices, and the remote device switches to another indirect path through an indirect path, and the remote device does not disconnect during the switching process, and maintains the indirect path. The base station is connected to ensure the continuity of the service of the remote device.

Application scenario 6: the serving base station of the first relay device is the first base station, the serving base station of the second relay device is the second base station, and the serving core network devices of the first relay device are all the first core network devices, and the second The service core network devices of the relay device are all second core network devices. The specific signaling interaction process is shown in Figure 9.

Steps 901 to 902 are the same as steps 701 to 702, and the details are not described again.

Step 903: The second relay device sends a second request message to the second core network device, where the second core network device receives the second request message sent by the second relay device.

Step 904: The second core network device authenticates and authorizes whether the remote device accesses the network through the second relay device.

Specifically, the second core network device determines, according to the indication information, that the remote device needs to access the network through the second relay device, and determines the IMSI of the second relay device according to the GUTI of the second relay device, according to the IMSI of the remote device. And second The IMSI of the relay device authenticates and authorizes whether the remote device accesses the network through the second relay device. If the authentication and authorization are passed, the subsequent steps are performed.

Optionally, if the second relay device is in an idle state, perform steps 905-907; otherwise, perform step 908.

Step 905: The second core network device sends an Initial Context Setup Request to the second base station.

The Initial Context Setup Request includes the context of the second relay device, such as an EPS bearer ID (EPS bearer ID), a QoS, and an S-GW address (S-GW address).

Step 906: The second base station establishes a context of the second relay device, and establishes an RB with the second relay device.

Step 907: The second base station sends an initial context setup complete (Initial Context Setup Complete) to the second core network device.

Step 908: The second core network device sends a Relocation Required to the first core network device.

Relocation Required contains the GUTI or IMSI of the remote device.

Step 909: The first core network device sends a handover request (Handover Request) to the first base station.

The Handover Request includes an identifier for the S1 interface allocated by the first base station for the remote device, and an identifier for the S1 interface allocated by the first core network device to the remote device.

It should be noted that, if the remote device has a context in the first core network device and the first base station, the S1 signaling between the first core network device and the first base station carries the first base station to allocate the remote device. The identifier for the S1 interface, and the identifier for the S1 interface assigned by the first core network device to the remote device

Step 910: The first base station returns a handover response (HO Response) to the first core network device.

The HO Response includes at least one of the following information: a source to target container, an identifier allocated by the first base station for the remote device for the S1 interface, and a first core network device allocated for the remote device. ID of the S1 interface.

Step 911: The first core network device sends a Relocaiton Response to the second core network device.

The Relocaiton Response includes context information of the remote device on the first core network device, Source to target container, and IMSI of the remote device.

Step 912: The second core network device sends a handover request (Handover Request) to the second base station.

The Handover Request includes an identifier for the S1 interface allocated by the second base station to the remote device, and the identifier of the S1 interface allocated by the second core network device to the remote device, Source to target container, and the second base station is the second medium. The identifier assigned to the S1 interface following the device assignment.

Step 913: The second base station multiplexes the first mapping relationship to the second mapping relationship. ,

The first mapping relationship is a mapping relationship between the EPS bearer ID of the remote device and the SLBI between the first relay device, and the second mapping relationship is a mapping relationship between the EPS bearer ID of the remote device and the SLBI between the second relay device. The second base station allocates a new L2 ID to the remote device, and establishes a mapping relationship between the EPS bearer ID corresponding to the L2 ID of the remote device and the DRB ID of the second relay device.

Step 914: The second base station sends an RRC connection reconfiguration message to the second relay device, and the second relay device returns an RRC Connection Complete message.

Step 915: The second base station sends a handover response (HO response) to the second core network device.

The HO response includes a target to source container, where the container includes the L2 ID of the remote device, the EPS bearer ID of the remote device, and the SLBI mapping relationship between the second relay device.

Step 916: The second core network device sends a Relocation Response Ack message to the first core network device, where the target to source container and the IMSI of the remote device are included.

Step 917: The first core network device sends a HO Response Ack message to the first base station, where the target to source container is included.

Step 918a: The first base station sends an RRC connection reconfiguration message to the first relay device, to notify the first relay device to delete the related configuration that is relayed to the remote device.

Step 918b: The first base station sends an RRC connection reconfiguration message to the remote device, to notify the remote device to switch to the second relay device.

The order of execution of step 918a and step 918b is not limited herein, or steps 918a and 918b may be performed in parallel.

Step 919: The remote device sends an indirect connection release (Direct Link Release) message to the first relay device, where the first relay device disconnects the PC5 connection with the first relay device, and the first relay device returns an indirect connection release to the remote device. Response response.

Step 920: The remote device multiplexes the first mapping relationship to the second mapping relationship, where the first mapping relationship is: mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, and the second mapping The relationship is a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier between the second relay device.

Step 921: The remote device establishes a PC5 connection with the second relay device.

Step 922: The remote device sends an RRC connection reconfiguration complete message to the second base station, to notify the second base station that the handover is complete.

Step 923: The first base station sends a handover complete message to the second core network device, to notify the second core network device that the handover is complete.

Through the foregoing description, in the application scenario 6, the first relay device is different from the serving base station and the serving core network device of the second relay device, and therefore the context of the remote device needs to pass through the first core network device from the second core network device. The first base station, the first core network device, and the second core network device are delivered to the second base station. The above method can save the signaling consumption of the remote device switching between the relay devices, and the remote device switches to another indirect path through an indirect path, and the remote device does not disconnect during the switching process, and maintains the indirect path. The base station is connected to ensure the continuity of the service of the remote device.

In summary, in the embodiment of the present application, by using the method of switching between the relay devices by using the remote device shown in FIG. 2 or FIG. 6, the signaling consumption of the remote device switching between the relay devices can be saved, and The remote device switches to another indirect path through an indirect path. During the switching process, the remote device does not disconnect, and the indirect path is connected to the base station to ensure the continuity of the remote device service. In addition, in the prior art, if the remote device wants to connect to the relay device, In the idle state, when the relay device receives the connection establishment request sent by the remote device, the relay device sends a service request to the core network device to enter the connection state; or, when the downlink data of the relay device arrives, the core network device passes Paging the relay device into the connected state. In the prior art, when the relay device registers the network, the core network device allocates a Tracking Area List (TAL) to the relay device. The tracking area list includes several base stations, and the core network device needs to be included in the TAL. The paging relay device under all the base stations consumes a large amount of network resources, resulting in waste of resources. The embodiment of the present application saves the network resource of paging the second relay device by paging the second relay device to the specific cell under the designated base station by using the core network device.

Based on the same inventive concept of the method for switching between the remote device and the relay device shown in FIG. 2, as shown in FIG. 10, the embodiment of the present application further provides a switching device 1000, which is applied to the remote end. The device is configured to perform the steps performed by the remote device in the method for switching the remote device between the relay devices shown in FIG. 2, the switching device 1000 includes a communication unit 1001 and a processing unit 1002, where:

The communication unit 1001 is configured to connect to the network by using the first relay device.

The processing unit 1002 is configured to acquire a first identifier of the second relay device.

The communication unit 1001 is further configured to send a request message to the base station by using the first relay device;

The request message includes a first identifier and indication information, where the indication information is used to indicate that the remote device switches between the relay devices, and the request message is used to request the base station to switch the remote device from being connected to the network through the first relay device. The second relay device is connected to the network;

The communication unit 1001 is further configured to receive a response message for the request message returned by the base station;

The processing unit 1002 is further configured to establish a connection with the second relay device based on the response message.

Optionally, the request message further includes a second identifier of the second relay device camping cell, where the second identifier is used by the base station to determine whether the serving base station of the second relay device is a base station.

Optionally, the second identifier is further configured to: when the second relay device is in an idle state, the core network device to which the second relay device belongs is paged in the second relay device camping cell.

Optionally, the communication unit 1001 is further configured to receive a response message sent by the base station, where the response message includes indication information;

The processing unit 1002 is further configured to: multiplex the first mapping relationship to the second mapping relationship according to the indication information, where the first mapping relationship is a mapping relationship between the bearer identifier of the device and the side link bearer identifier between the first relay device, where The second mapping relationship is a mapping relationship between the bearer label of the device and the side link bearer identifier between the second relay device.

Based on the same inventive concept of the method for switching between the remote device and the relay device shown in FIG. 2, as shown in FIG. 11, the embodiment of the present application further provides a switching device 1100, which is applied to the first device. The base station is configured to perform the steps performed by the first base station in the method for switching the remote device between the relay devices shown in FIG. 2, the switching device 1100 includes a communication unit 1101 and a processing unit 1102, where:

The communication unit 1101 is configured to receive a first request message sent by the remote device by using the first relay device, where the first request message includes a first identifier of the second relay device and is used to identify the switch between the relay devices. Indication information;

The processing unit 1102 is configured to switch, according to the first request message, the remote device from the first relay device connection network to the second relay device to connect to the network.

Optionally, the first request message further includes: a second identifier of the second relay device camping cell; the second identifier is used by the processing unit to determine whether the serving base station of the second relay device is a device.

Optionally, the processing unit 1102 is specifically configured to:

Sending a second request message to the first core network device, where the second request message includes: a first identifier of the second relay device received from the first request message, and an indication information for identifying a handover between the relay devices The indication information is used to indicate the first core network device: the remote device will be switched by connecting the network through the first relay device to the network connected by the second relay device;

Or sending a second request message to the first core network device, where the first core network device sends a third request message to the second core network device, where the third request message includes: receiving the second request message from the second request message. a first identifier of the relay device and indication information for identifying a handover between the relay devices; the indication information indicates a second core network device: the remote device is to be switched by the first relay device to the second relay device Connect Network.

Optionally, the first request message further includes a second identifier of the second relay device camping cell;

If the processing unit 1102 determines that the serving base station of the second relay device is the first base station according to the second identifier of the second relay device camping cell, the processing unit 1102 is specifically configured to:

And multiplexing the first mapping relationship with the second mapping relationship, where the first mapping relationship is: a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, where the second mapping relationship is the remote device a mapping relationship between the bearer identifier and the side link bearer identifier between the second relay device;

Or, if the processing unit 1102 determines that the serving base station of the second relay device is not the first base station according to the second identifier of the second relay device camping cell, the second request message further includes a first mapping relationship, where The base station multiplexes the first mapping relationship to the second mapping relationship.

Based on the same inventive concept of the method for switching between the remote device and the relay device shown in FIG. 6, as shown in FIG. 12, the embodiment of the present application further provides a switching device 1200, which is applied to the remote end. The device is configured to perform the steps performed by the remote device in the method for switching the remote device between the relay devices shown in FIG. 6. The switching device 1200 includes a communication unit 1201 and a processing unit 1202, where:

The communication unit 1201 is configured to connect to the network by using the first relay device, and send a request message to the second relay device.

The request message includes: an identifier of the remote device and indication information for identifying a handover between the relay devices; the request message is used to request the second relay device to initiate a request to the network, to pass the remote device by the first The relay device connects to the network to switch to the network connected by the second relay device;

The communication unit 1201 is further configured to receive a response message sent by the base station;

The processing unit 1202 is configured to establish a connection with the second relay device based on the response message.

Optionally, the response message includes indication information for identifying a handover between the relay devices;

The processing unit 1202 is further configured to: after the communication unit 1201 receives the response message sent by the base station, multiplex the first mapping relationship to the second mapping relationship according to the response message, where the first mapping relationship is: the bearer identifier of the remote device and the first The mapping relationship between the bearer identifier of the side link and the bearer identifier of the second link device is the mapping relationship between the bearer label of the remote device and the side link bearer identifier of the second relay device.

Based on the same inventive concept of the method for switching between the remote device and the relay device shown in FIG. 6 , as shown in FIG. 13 , the embodiment of the present application further provides a switching device 1300 , where the switching device 1300 is applied to the second device. a relay device, configured to perform the steps performed by the second relay device in the method for switching the remote device between the relay devices shown in FIG. 6, the switching device 1300 includes a communication unit 1301 and a processing unit 1302, where:

The remote device is connected to the network by using the first relay device, and the communication unit 1301 is configured to receive the first request message sent by the remote device, where the first request message includes: an identifier of the remote device and is used to identify the device between the relay devices. Instructions for switching;

The processing unit 1302 is configured to initiate a request to the network according to the first request message, to pass the remote device by using the first The relay device connects to the network to switch to the network connected by the second relay device.

Optionally, the processing unit 1302 is specifically configured to:

If the core network device serving the first relay device is the first core network device, and the core network device serving the second relay device is the second core network device, the communication unit 1301 is further configured to send the second core network device to the second core network device. The second request message includes: an identifier of the remote device received from the first request message and indication information for identifying handover between the relay devices; and the second request message is used by the second core network device Sending a third request message to the first core network device, where the third request message includes: an identifier of the remote device received from the second request message, and indication information for identifying a handover between the relay devices, where the indication information is used Instructing the first core network device: the remote device will be switched to be connected to the network by the second relay device by connecting the network through the first relay device; or

If the first network device that serves the first relay device and the second relay device is the first core network device, the communication unit 1301 is further configured to send a second request message to the first core network device, where the second request message is used. The method includes: an identifier of the remote device received from the first request message, and indication information for identifying a handover between the relay devices, where the indication information is used to indicate the first core network device: the remote device is to be passed by the first relay The device connection network switches to the network connected by the second relay device.

Based on the same inventive concept of the method for switching between the remote device and the relay device shown in FIG. 6 , as shown in FIG. 14 , the embodiment of the present application further provides a switching device 1400, where the switching device 1400 is applied to the second device. The core network device is configured to perform the steps performed by the second core network device in the method for switching the remote device between the relay devices shown in FIG. 6. The switching device 1400 includes a receiving unit 1401 and a sending unit 1402, where:

The remote device connects to the network through the first relay device. If the core network device serving the first relay device is the first core network device and the core network device serving the second relay device is the second core network device, then:

The receiving unit 1401 is configured to receive a second request message that is sent by the second relay device after receiving the first request message, where the second request message includes an identifier of the remote device and an indication for identifying switching between the relay devices. information;

The sending unit 1402 is configured to send a third request message to the first core network device, where the third request message includes: an identifier of the remote device received from the second request message and used to identify the switch between the relay devices. Instructing information, the indication information is used to indicate the first core network device: the remote device will be switched to be connected to the network by the second relay device by connecting the network through the first relay device;

If the first network device that serves the first relay device and the second relay device serves the first core network device, then:

The sending unit 1402 is configured to send a fourth request message to the serving base station of the second relay device, where the fourth request message is used to indicate the serving base station of the second relay device: acquiring the first mapping relationship, and multiplexing the first mapping relationship to The second mapping relationship is: a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the first relay device, where the second mapping relationship is the bearer label of the remote device and the second The mapping relationship between the side links carrying the identifiers between the devices.

Optionally, the receiving unit 1401 is further configured to: after sending the third request message to the first core network device, receive the response message returned by the first core network device;

The sending unit 1402 is further configured to send a fifth request message to the serving base station of the second relay device, where the fifth request message includes an identifier of the second relay device, and the identifier of the second relay device is used to indicate the serving base station: The end device will switch to the network connected by the second relay device.

Correspondingly, based on the same inventive concept of the method for switching between the remote device and the relay device shown in FIG. 2, as shown in FIG. 15, the embodiment of the present application further provides a remote device 1500, the remote device 1500 includes transceiver 1501 And a processor 1502, the processor 1502 is configured to execute a set of programs, when the program is executed, the remote device 1500 can perform the remote device execution in the method of switching between the remote devices shown in FIG. A step of. The specific steps are not described here.

Optionally, the remote device 1500 further includes a memory 1503 for storing a program executed by the processor 1502.

The processor 1502 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.

The processor 1502 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

The memory 1503 may include a volatile memory such as a random-access memory (RAM); the memory 1503 may also include a non-volatile memory such as a flash memory (flash) Memory), hard disk drive (HDD) or solid-state drive (SSD); the memory 1503 may also include a combination of the above types of memory.

Based on the same inventive concept of the method for switching between the remote device and the relay device shown in FIG. 2, as shown in FIG. 16, the embodiment of the present application further provides a base station 1600, where the base station 1600 includes a transceiver 1601 and a processor. 1602. The processor 1602 is configured to execute a set of programs. When the program is executed, the base station 1600 can perform the steps performed by the first base station in the method for the remote device to switch between the relay devices shown in FIG. 2. The specific steps are not described here.

Optionally, the base station 1600 further includes a memory 1603 for storing a program executed by the processor 1602.

The processor 1602 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.

The processor 1602 can also further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

The memory 1603 may include a volatile memory such as a random-access memory (RAM); the memory 1603 may also include a non-volatile memory such as a flash memory (flash) Memory), hard disk drive (HDD) or solid-state drive (SSD); the memory 1603 may also include a combination of the above types of memory.

Based on the same inventive concept of the method for switching between the remote device and the relay device shown in FIG. 6, as shown in FIG. 17, the embodiment of the present application further provides a remote device 1700, where the remote device 1700 includes a transceiver. 1701 and a processor 1702, the processor 1702 is configured to execute a set of programs, when the program is executed, to enable the remote device 1700 to perform the remote device in the method of switching between the relay devices shown in FIG. The steps of the device. The specific steps are not described here.

Optionally, the remote device 1700 further includes a memory 1703 for storing a program executed by the processor 1702.

The processor 1702 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.

The processor 1702 may further include a hardware chip. The above hardware chip may be an application-specific integrated circuit (ASIC), programmable logic device (programmable) Logic device, PLD) or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

The memory 1703 may include a volatile memory such as a random-access memory (RAM); the memory 1703 may also include a non-volatile memory such as a flash memory (flash) Memory), hard disk drive (HDD) or solid state drive (SSD); the memory 1703 may also include a combination of the above types of memory.

Based on the same inventive concept of the method for switching between the remote device and the relay device shown in FIG. 6, as shown in FIG. 18, the embodiment of the present application further provides a relay device 1800, where the relay device 1800 includes a transceiver. 1801 and a processor 1802. The processor 1802 is configured to execute a set of programs. When the program is executed, the relay device 1800 can perform the second method in which the remote device switches between the relay devices shown in FIG. Following the steps performed by the device. The specific steps are not described here.

Optionally, the relay device 1800 further includes a memory 1803 for storing a program executed by the processor 1802.

The processor 1802 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.

The processor 1802 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

The memory 1803 may include a volatile memory such as a random-access memory (RAM); the memory 1803 may also include a non-volatile memory such as a flash memory (flash) Memory), hard disk drive (HDD) or solid-state drive (SSD); the memory 1803 may also include a combination of the above types of memories.

Based on the same inventive concept of the method for switching between the remote device and the relay device shown in FIG. 6, as shown in FIG. 19, the embodiment of the present application further provides a core network device 1900, where the core network device 1900 includes a transceiver. 1901 and processor 1902, the processor 1902 is configured to execute a set of programs, when the program is executed, the core network device 1900 can perform the second core in the method for switching the remote device between the relay devices shown in FIG. The steps performed by the network device. The specific steps are not described here.

Optionally, the core network device 1900 further includes a memory 1903 for storing a program executed by the processor 1902.

The processor 1902 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.

The processor 1902 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

The memory 1903 may include a volatile memory such as a random-access memory (RAM); the memory 1903 may also include a non-volatile memory such as a flash memory (flash) Memory), hard disk drive (HDD) or solid state drive (solid-state drive, SSD); the memory 1903 may also include a combination of the above types of memories.

The embodiment of the present application provides a computer storage medium for storing a computer program, the computer program comprising a method for performing the method shown in FIG. 2 or FIG.

Embodiments of the present application provide a computer program product comprising instructions that, when run on a computer, cause the computer to perform the method illustrated in FIG. 2 or FIG.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the present application has been described, it will be apparent that those skilled in the art can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A method for switching a remote device between relay devices, comprising:

The remote device connects to the network through the first relay device;

The remote device acquires a first identifier of the second relay device;

Sending, by the first relay device, the request message to the base station by using the first relay device;

The request message includes the first identifier and the indication information, where the indication information is used to indicate that the remote device switches between the relay devices, and the request message is used to request the base station to End device switching from being connected to the network by the first relay device to being connected to the network by the second relay device;

Receiving, by the remote device, a response message for the request message returned by the base station;

The remote device establishes a connection with the second relay device based on the response message.
The method according to claim 1, wherein the request message further includes a second identifier of the second relay device camping cell; the second identifier is used by the base station to determine the second Whether the serving base station of the relay device is the base station.
The method according to claim 2, wherein the second identifier is further configured to: when the second relay device is in an idle state, the core network device that administers the second relay device is in the The second relay device camps in the cell for paging.
The method according to any one of claims 1 to 3, wherein after the remote device sends a request message to the base station by using the first relay device, the method further includes:

Receiving, by the remote device, a response message sent by the base station, where the response message includes the indication information;

The remote device multiplexes the first mapping relationship to the second mapping relationship according to the indication information, where the first mapping relationship is a side chain between the bearer identifier of the remote device and the first relay device. The mapping relationship between the bearer identifier of the road and the second mapping relationship is a mapping relationship between the bearer label of the remote device and the side link bearer identifier of the second relay device.
A method for switching a remote device between relay devices, comprising:

Receiving, by the first base station, the first request message sent by the remote device by using the first relay device, where the first request message includes a first identifier of the second relay device and an indication for identifying switching between the relay devices information;

The first base station switches the remote device from being connected to the network by the first relay device to the network connected by the second relay device according to the first request message.
The method according to claim 5, wherein the first request message further comprises: the second identifier of the second relay device camping cell; the second identifier is used by the first base station Determining whether the serving base station of the second relay device is the first base station.
The method according to claim 6, wherein the second identifier is further configured to: when the second relay device is in an idle state, the core network device that administers the second relay device is in the The second relay device camps in the cell for paging.
The method according to any one of claims 5 to 7, wherein the first base station switches the remote device to the network connected through the first relay device according to the first request message. Connecting to the network by the second relay device, including:

The first base station sends a second request message to the first core network device, where the second request message includes: the first identifier and the second relay device received from the first request message Switching between the relays Instructing information; the indication information is used to indicate the first core network device: the remote device is to be switched by the first relay device to connect to the network by the second relay device;

Or the first base station sends the second request message to the first core network device, where the first core network device sends a third request message to the second core network device, where the third request message is And including: a first identifier of the second relay device received from the second request message, and indication information for identifying a handover between the relay devices; the indication information indicating the second core network device The remote device will be switched by the connection network through the first relay device to the network connected by the second relay device.
The method according to any one of claims 5 to 8, wherein the first request message further includes a second identifier of the second relay device camping cell;

If the first base station determines that the serving base station of the second relay device is the first base station according to the second identifier of the second relay device camping cell, the first base station is configured according to the first And the requesting message, the remote device is switched from being connected to the network by the first relay device to the network connected by the second relay device, including:

The first base station multiplexes the first mapping relationship to the second mapping relationship, where the first mapping relationship is: mapping between the bearer identifier of the remote device and the side link bearer identifier between the first relay device The second mapping relationship is a mapping relationship between the bearer identifier of the remote device and the side link bearer identifier between the second relay device;

or

If the first base station determines that the serving base station of the second relay device is not the first base station according to the second identifier of the second relay device camping cell, the second request message further includes The first mapping relationship is used by the second base station to multiplex the first mapping relationship to the second mapping relationship.
A method for switching a remote device between relay devices, comprising:

The remote device connects to the network through the first relay device;

Sending, by the remote device, a request message to the second relay device;

The request message includes: an identifier of the remote device and indication information for identifying a handover between the relay devices; the request message is used to request the second relay device to initiate a request to the network To switch the remote device from being connected to the network by the first relay device to the network connected by the second relay device;

Receiving, by the remote device, a response message sent by the base station;

The remote device establishes a connection with the second relay device based on the response message.
The method according to claim 10, wherein the response message includes indication information for identifying a handover between the relay devices;

After receiving the response message sent by the base station, the remote device further includes: the remote device multiplexing the first mapping relationship to the second mapping relationship according to the response message, where the first mapping relationship is: the far a mapping relationship between the bearer identifier of the end device and the side link bearer identifier of the first relay device, where the second mapping relationship is between the bearer label of the remote device and the second relay device The mapping relationship between the side link bearer identifiers.
A method for the remote device to switch between the relay devices, where the remote device is connected to the network by using the first relay device, and the method includes:

The second relay device receives the first request message sent by the remote device, where the first request message includes: an identifier of the remote device and indication information used to identify a handover between the relay devices;

The second relay device initiates a request to the network according to the first request message, to switch the remote device from being connected to the second relay device by using the first relay device Connect Network.
The method of claim 12, wherein said second relay device is responsive to said first request a message to initiate a request to the network, including:

If the core network device serving the first relay device is the first core network device, and the core network device serving the second relay device is the second core network device, the second relay device is The second core network device sends a second request message, where the second request message includes: an identifier of the remote device received from the first request message, and an indication for identifying a handover between the relay devices. The second request message is used by the second core network device to send a third request message to the first core network device, where the third request message includes: a location received from the second request message The identifier of the remote device and the indication information for identifying the handover between the relay devices, the indication information is used to indicate the first core network device: the remote device is to be connected by the first relay device Switching the network to the network connected by the second relay device; or

If the first relay device serving the first relay device and the core network device serving the second relay device are both the first core network device, the second relay device sends the first relay device to the first core network device. And a second request message, where the second request message includes: an identifier of the remote device received from the first request message, and indication information for identifying a handover between the relay devices, where the indication information is used by Instructing the first core network device: the remote device will be switched by the first relay device connection network to be connected to the network by the second relay device.
A method for the remote device to switch between the relay devices, where the remote device is connected to the network by using the first relay device, and the method includes:

If the core network device serving the first relay device is the first core network device, and the core network device serving the second relay device is the second core network device, then:

The second core network device receives a second request message that is sent by the second relay device after receiving the first request message, where the second request message includes the identifier of the remote device and is used to identify Indication information for switching between relay devices;

The second core network device sends a third request message to the first core network device, where the third request message includes: identifier and usage of the remote device received from the second request message And indicating indication information for switching between the relay devices, where the indication information is used to indicate the first core network device: the remote device is to be switched by the first relay device connection network to the second The relay device is connected to the network;

If the first relay device serving the first relay device and the core network device serving the second relay device are both the first core network device, then:

The first core network device receives a second request message that is sent by the second relay device after receiving the first request message, where the second request message includes an identifier of the remote device and is used to identify Indication information for switching between relay devices;

The first core network device sends a fourth request message to the serving base station of the second relay device, where the fourth request message is used to indicate that the serving base station of the second relay device acquires the first mapping relationship. And multiplexing the first mapping relationship with the second mapping relationship, where the first mapping relationship is: a mapping relationship between a bearer identifier of the remote device and a side link bearer identifier between the first relay device, where The second mapping relationship is a mapping relationship between the bearer label of the remote device and the side link bearer identifier of the second relay device.
The method according to claim 14, wherein after the second core network device sends the third request message to the first core network device, the method further includes:

Receiving, by the second core network device, a response message returned by the first core network device;

The second core network device sends a fifth request message to the serving base station of the second relay device, where the fifth request message includes an identifier of the second relay device, where the second relay device Identification is used to indicate the service base Station: The remote device will switch to connect to the network by the second relay device.
A switching device is applied to a remote device, wherein the device comprises:

a communication unit, configured to connect to the network by using the first relay device;

a processing unit, configured to acquire a first identifier of the second relay device;

The communication unit is further configured to send a request message to the base station by using the first relay device;

The request message includes the first identifier and the indication information, where the indication information is used to indicate that the remote device switches between the relay devices, and the request message is used to request the base station to End device switching from being connected to the network by the first relay device to being connected to the network by the second relay device;

The communication unit is further configured to receive a response message returned by the base station for the request message;

The processing unit is further configured to establish a connection with the second relay device based on the response message.
The apparatus according to claim 16, wherein the request message further includes a second identifier of the second relay device camping cell; the second identifier is used by the base station to determine the second identifier Whether the serving base station of the relay device is the base station.
The device according to claim 17, wherein the second identifier is further configured to: when the second relay device is in an idle state, the core network device that administers the second relay device is in the The second relay device camps in the cell for paging.
The device according to any one of claims 16 to 18, wherein the communication unit is further configured to receive a response message sent by the base station, where the response message includes the indication information;

The processing unit is further configured to: multiplex the first mapping relationship to the second mapping relationship according to the indication information, where the first mapping relationship is a side between the bearer identifier of the device and the first relay device The mapping relationship between the bearer identifier of the link and the second mapping relationship is a mapping relationship between the bearer label of the device and the side link bearer identifier of the second relay device.
A switching device is applied to a first base station, and includes:

a communication unit, configured to receive a first request message sent by the remote device by using the first relay device, where the first request message includes a first identifier of the second relay device and is used to identify that the device is switched between the relay devices Instructions;

And a processing unit, configured to switch, according to the first request message, the remote device from the first relay device connection network to the second relay device to connect to the network.
The apparatus according to claim 20, wherein the first request message further comprises: the second identifier of the second relay device camping on the cell; the second identifier is used by the processing unit to determine Whether the serving base station of the second relay device is the device.
The device according to claim 21, wherein the second identifier is further configured to: when the second relay device is in an idle state, the core network device that administers the second relay device is in the The second relay device camps in the cell for paging.
The device according to any one of claims 20 to 22, wherein the processing unit is specifically configured to:

And sending, by the first core network device, a second request message, where the second request message includes: the first identifier of the second relay device received from the first request message, and the identifier used for the relay Instructing information for switching between devices; the indication information is used to indicate the first core network device: the remote device will be switched by connecting the network through the first relay device to connecting to the network by the second relay device ;

Or sending the second request message to the first core network device, where the first core network device sends a third request message to the second core network device, where the third request message includes: Received in the second request message a first identifier of the second relay device and indication information for identifying a handover between the relay devices; the indication information indicating the second core network device: the remote device is to be passed by the first The device connection network is switched to connect to the network by the second relay device.
The device according to any one of claims 20 to 23, wherein the first request message further includes a second identifier of the second relay device camping cell;

If the processing unit determines that the serving base station of the second relay device is the first base station according to the second identifier of the second relay device camping cell, the processing unit is specifically configured to:

And multiplexing the first mapping relationship with the second mapping relationship, where the first mapping relationship is: a mapping relationship between the bearer identifier of the remote device and a side link bearer identifier between the first relay device, where The mapping relationship between the bearer identifier of the remote device and the side link bearer identifier of the second relay device;

or

If the processing unit determines that the serving base station of the second relay device is not the first base station according to the second identifier of the second relay device camping cell, the second request message further includes the The first mapping relationship is used by the second base station to multiplex the first mapping relationship to the second mapping relationship.
A switching device is applied to a remote device, wherein the device comprises:

a communication unit, configured to connect to the network by using the first relay device, and send a request message to the second relay device;

The request message includes: an identifier of the remote device and indication information for identifying a handover between the relay devices; the request message is used to request the second relay device to initiate a request to the network To switch the remote device from being connected to the network by the first relay device to the network connected by the second relay device;

The communication unit is further configured to receive a response message sent by the base station;

And a processing unit, configured to establish a connection with the second relay device based on the response message.
The apparatus according to claim 25, wherein said response message includes indication information for identifying handover between relay devices;

The processing unit is further configured to: after the communication unit receives the response message sent by the base station, multiplex the first mapping relationship to the second mapping relationship according to the response message, where the first mapping relationship is: the far a mapping relationship between the bearer identifier of the end device and the side link bearer identifier of the first relay device, where the second mapping relationship is between the bearer label of the remote device and the second relay device The mapping relationship between the side link bearer identifiers.
A switching device, the remote device is connected to the network through the first relay device, and the device is applied to the second relay device, wherein the device includes:

a communication unit, configured to receive a first request message sent by the remote device, where the first request message includes: an identifier of the remote device, and indication information used to identify a handover between the relay devices;

a processing unit, configured to initiate a request to the network according to the first request message, to switch the remote device from being connected to the network by using the first relay device to connect to the network by the second relay device .
The device according to claim 27, wherein the processing unit is specifically configured to:

If the core network device serving the first relay device is the first core network device, and the core network device serving the second relay device is the second core network device, the communication unit is further configured to The second core network device sends a second request message, where the second request message includes: an identifier of the remote device received from the first request message, and an indication for identifying a handover between the relay devices. The second request message is used by the second core network device to send a third request message to the first core network device, where the third request message includes: a location received from the second request message An identifier of the remote device and indication information for identifying a handover between the relay devices, where the indication information is used to indicate The first core network device: the remote device will be switched to be connected to the network by the second relay device by the first relay device connection network; or

If the first relay device and the core network device serving the second relay device are both the first core network device, the communication unit is further configured to send the first to the first core network device And a second request message, where the second request message includes: an identifier of the remote device received from the first request message, and indication information for identifying a handover between the relay devices, where the indication information is used by Instructing the first core network device: the remote device will be switched by the first relay device connection network to be connected to the network by the second relay device.
A switching device, the remote device is connected to the network through the first relay device, and the switching device is applied to the second core network device, wherein the device comprises a receiving unit and a sending unit; wherein:

If the core network device serving the first relay device is the first core network device, and the core network device serving the second relay device is the second core network device, then:

The receiving unit is configured to receive a second request message that is sent by the second relay device after receiving the first request message, where the second request message includes an identifier of the remote device and is used to identify Indication information for switching between relay devices;

The sending unit is configured to send a third request message to the first core network device, where the third request message includes: identifier and usage of the remote device received from the second request message And indicating indication information for switching between the relay devices, where the indication information is used to indicate the first core network device: the remote device is to be switched by the first relay device connection network to the second The relay device is connected to the network;

If the first relay device serving the first relay device and the core network device serving the second relay device are both the first core network device, then:

The receiving unit is configured to receive a second request message that is sent by the second relay device after receiving the first request message, where the second request message includes an identifier of the remote device and is used to identify Indication information for switching between relay devices;

The sending unit is configured to send a fourth request message to the serving base station of the second relay device, where the fourth request message is used to indicate that the serving base station of the second relay device acquires the first mapping relationship. And multiplexing the first mapping relationship with the second mapping relationship, where the first mapping relationship is: a mapping relationship between a bearer identifier of the remote device and a side link bearer identifier between the first relay device, where The second mapping relationship is a mapping relationship between the bearer label of the remote device and the side link bearer identifier of the second relay device.
The apparatus according to claim 29, wherein the receiving unit is further configured to: after transmitting the third request message to the first core network device, receive a response message returned by the first core network device;

The sending unit is further configured to send a fifth request message to the serving base station of the second relay device, where the fifth request message includes an identifier of the second relay device, and the second relay device The identifier is used to indicate the serving base station: the remote device will switch to connect to the network by the second relay device.