WO2013113240A1

WO2013113240A1 - Method for transmitting rn information, method for paging ue and apparatus thereof

Info

Publication number: WO2013113240A1
Application number: PCT/CN2012/087426
Authority: WO
Inventors: 焦斌
Original assignee: 电信科学技术研究院
Priority date: 2012-02-02
Filing date: 2012-12-25
Publication date: 2013-08-08
Also published as: CN102573066A; CN102573066B

Abstract

Disclosed are a method for transmitting RN information, a method for paging UE and an apparatus thereof, and the methods and the apparatus are used for enabling the acquisition of RN information with a core network device and paging of an idle UE in a RN. The method for acquiring the RN information comprises: in a position updating process, the core network device receives an uplink UE correlation S1AP message sent by a mobile RN; according to the uplink UE correlation S1AP message, the core network device determines the identification of the mobile RN which sends the uplink UE correlation S1AP message, and stores the identification of the mobile RN into the context of the UE related to the uplink UE correlation S1AP message. The method for paging the UE comprises: according to a trigger condition, the core network device determines that initiating a paging process to the UE in an idle state is needed; the core network device determines whether the UE stays under the mobile RN or not according to the context of the UE, and if so, according to the identification of the mobile RN stored in the context of the UE, a paging message is sent to the corresponding mobile RN.

Description

The present invention claims to be submitted to the Chinese Patent Office on February 2, 2012, the application number is 201210023592.X, and the invention name is "a method for transmitting RN information and paging a UE". The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference. Technical field

The present invention relates to the field of communications, and in particular, to a method and apparatus for transmitting RN (Relay Node) information and paging a UE. Background technique

The Mobility Management Entity (Mobility Management Entity) uses the Tracking Area (Tracking Area) as the granularity to manage the UE (User Equipment) mobility, including paging to the UE, and the structure of the Tracking Area. The schematic diagram is shown in Figure 1. Generally, a Tracking Area area includes a plurality of cells controlled by a plurality of base stations, and the cells controlled by the base stations 1, 2, and 3 are configured to belong to the Tracking Area 1 according to FIG. 1; the cells controlled by the base stations 4, 5, and 6 are The configuration belongs to the Tracking Area 2, and the UE 1 does not need to initiate a location update process when the Tracking Area 1 belongs to the cell. When the UE1 moves out of the Tracking Area 1, the UE1 needs to initiate a new location update process (for example, the UE1 moves to the Tracking Area 2). When the network wants to page UE1, the paging message will be sent to all base stations included in Tracking Area1 (in this example, the target base station for paging includes base stations 1, 2 and 3), and after receiving the paging message, the target base station receives the paging message. , respectively, sending a downlink paging message on the air interface of the cell that is controlled by itself. UE1 receives a paging message to itself from the downlink paging channel of the current self-resident cell. Generally, the downlink paging channel capacity of each cell is constant. Therefore, when planning the Tracking Area, an important input is the number of UEs in the idle state in the target area and the probability that the UE in the idle state transitions to the connected state. Avoid the paging congestion problem caused by the overload of the paging channel caused by excessive paging message overload.

The introduction of Mobile Relay is mainly to solve the problem of high-speed railway coverage scenarios, usually deploying a mobile relay on each train. The system structure and configuration of the mobile relay is shown in Figure 2.

There is currently no solution for the Tracking Area setting of the cell controlled by the Mobile Relay. One possible method is to configure different Delay-controlled cells to be different from each other. The advantage of this method is that for any UE residing under the Mobile Relay, the Paging message only needs to be sent to the unique one. Target Mobile Relay, which optimizes paging signaling transmission. Since this method needs to configure different Tracking Area IDs for different mobile relays, the capacity of the Tracking Area ID itself is required. Since the number of Mobile Relays in the network may be very large, the capacity of the Tracking Area ID itself as an existing parameter cannot be satisfied for each The Mobile Relay assigns different Tracking Area IDs. Summary of the invention

The embodiments of the present invention provide a method and a device for transmitting RN information and paging a UE, which are used to implement the RN information of the core network device, and implement paging for the idle UE under the RN.

A method for obtaining RN information includes the following steps:

The core network device receives the uplink UE related S1AP message sent by the mobile RN in the location update process; the core network device determines the identity of the mobile RN that sends the uplink UE related S1AP message by using the uplink UE related S1AP message, and saves the identifier of the mobile RN to In the context of the UE associated with the uplink UE related S1AP message.

A method for extracting RN information includes the following steps:

The mobile RN receives a location update request message sent by the UE;

The mobile RN sends an uplink UE related S 1 AP message to the core network device, and the uplink UE related S 1 AP message carries the identifier of the mobile RN.

A method for extracting RN information includes the following steps:

The mobile RN sends its own identity and address information to the core network device when establishing a connection with the core network device; the mobile RN receives the location update request message sent by the UE;

The mobile RN sends an uplink UE related S 1 AP message to the core network device, and the uplink UE related S 1 AP message carries the address information of the mobile RN.

A method for paging a UE includes the following steps:

The core network device determines, according to the trigger condition, that a paging process needs to be initiated for the UE in the idle state;

The core network device determines, according to the context of the UE, whether the UE resides under the mobile RN;

If yes, the core network device sends a paging message to the corresponding mobile RN according to the identity of the mobile RN stored in the context of the UE.

A core network device, including:

An interface module, configured to receive an uplink UE related SI AP message sent by the mobile RN during the location update process, where the control module is configured to determine, by using an uplink UE related S1AP message, an identifier of the mobile RN that sends the uplink UE related S1AP message, and The identity of the RN is saved in the context of the UE associated with the uplink UE related S1AP message.

A mobile RN, including:

a user interface module, configured to receive a location update request message sent by the UE;

The network interface module is configured to send an uplink UE related S1AP message to the core network device, where the uplink UE related S1AP message carries the identifier of the mobile RN. A mobile RN, including:

a network interface module, configured to send its own identifier and address information to the core network device when establishing a connection with the core network device;

The network interface module sends an uplink UE related S1AP message to the core network device, and the uplink UE related S1AP message carries the address information of the mobile RN.

A core network device, including:

a triggering module, configured to determine, according to the triggering condition, that a paging process needs to be initiated for the UE in an idle state;

a control module, configured to determine, according to a context of the UE, whether the UE resides under the mobile RN;

The interface module is configured to: when the determination is yes, send a paging message to the corresponding mobile RN according to the identifier of the mobile RN stored in the context of the UE.

In the embodiment of the present invention, when the core network device needs to page to the UE in the idle state, it is determined whether the UE is camped on the mobile RN, and if yes, sends a paging message to the mobile RN instead of all in the TA. The base station sends a paging message. The paging problem of the idle state UE in the mobile RN is solved, and the paging message is sent to the specific RN, thereby saving network resources. The core network device needs to determine the identity of the mobile RN during the location update process before sending the paging message to the mobile RN. In the embodiment of the present invention, the core network device may directly obtain the identifier of the mobile RN in the location update process, or obtain the identifier of the mobile RN in the process of establishing a connection with the mobile RN. DRAWINGS

1 is a schematic structural diagram of a Tracking Area in the prior art;

2 is a schematic diagram showing the structure and configuration of a system for introducing a mobile relay in the prior art;

3 is a flowchart of a main method for a core network device to obtain mobile RN information according to an embodiment of the present invention;

4 is a flowchart of a first method for reporting RN information according to an embodiment of the present invention;

FIG. 5 is a flowchart of a second method for reporting RN information according to an embodiment of the present invention;

6 is a flowchart of a method for determining and saving a mobile RN identifier when an uplink UE related S1AP (S1 interface application protocol) message carries an identifier of a mobile RN according to an embodiment of the present disclosure;

7 is a flowchart of a method for determining and saving a mobile RN identifier when an uplink UE related S 1 AP message carries address information of a mobile RN according to an embodiment of the present invention;

FIG. 8 is a flowchart of a method for updating a UE context after a UE moves out of a coverage area of a mobile RN according to an embodiment of the present invention; FIG. 9 is a flowchart of a method for paging a UE according to an embodiment of the present invention;

FIG. 10 is a structural diagram of a core network device when obtaining RN information according to an embodiment of the present invention;

11 is a structural diagram of an RN according to an embodiment of the present invention; FIG. 12 is a structural diagram of a core network device when paging a UE according to an embodiment of the present invention. detailed description

In the embodiment of the present invention, when the core network device needs to page to the UE in the idle state, it is determined whether the UE is camped on the mobile RN, and if yes, sends a paging message to the mobile RN instead of all in the TA. The base station sends a paging message. The paging problem of the idle state UE in the mobile RN is solved, and the paging message is sent to the specific RN, thereby saving network resources. The core network device needs to determine the identity of the mobile RN during the location update process before sending the paging message to the mobile RN. In the embodiment of the present invention, the core network device may directly obtain the identifier of the mobile RN in the location update process, or obtain the identifier of the mobile RN in the process of establishing a connection with the mobile RN.

Referring to FIG. 3, the main method for obtaining the mobile RN information by the core network device in this embodiment is as follows:

Step 301: The core network device receives an uplink UE related S1AP message sent by the mobile RN in the location update process. Step 302: The core network device determines, by using an uplink UE related S1AP message, an identifier of the mobile RN that sends the uplink UE related S1AP message, and saves the identifier of the mobile RN to the context of the UE related to the uplink UE related S1AP message.

The uplink UE related S1AP message is specifically a location update message, and may carry the identity of the mobile RN or the address information of the mobile RN (such as an IP (Internet Protocol) address, etc.).

When the uplink UE related S1AP message carries the scheme of the identity of the mobile RN, the core network device directly determines the identity of the mobile RN that sends the uplink UE related S1AP message by using the uplink UE related S1AP message.

When the uplink UE related S1AP message carries the scheme of the mobile RN's address information, the core network device obtains the identity and address information of the mobile RN in the process of establishing a connection with the mobile RN, and then determines to send the uplink UE related S1AP message. The address information of the mobile RN of the uplink UE related S1AP message, and the identifier of the mobile RN is determined by the address information.

Preferably, the identifier of the mobile RN is a specific range of base station identifiers, or includes a base station identifier and a mobile RN type. After the UE moves out of the coverage area of the mobile RN, the UE sends a location update request to the base station. The core network device receives the uplink UE-related S1AP message sent by the base station in the location update process, and queries the context of the UE related to the uplink UE-related S1AP message. If the identifier of the mobile RN is queried, the mobile RN saved in the UE context is deleted. Logo.

The implementation process of the mobile network RN is determined by the mobile network RN. In the face of the implementation process of reporting RN information, there are two main implementation methods, as shown in Figure 4 and Figure 5.

Referring to FIG. 4, the flow of the first method for reporting RN information in this embodiment is as follows: Step 401: The mobile RN receives a location update request message sent by the UE.

Step 402: The mobile RN sends an uplink UE related S 1 AP message to the core network device, where the uplink UE related S 1 AP message carries the identifier of the mobile RN.

Preferably, the identifier of the mobile RN is a specific range of base station identifiers, or includes a base station identifier and a mobile RN type. Referring to FIG. 5, the second method for reporting RN information in this embodiment is as follows:

Step 501: The mobile RN sends its own identity and address information to the core network device when establishing a connection with the core network device.

Step 502: The mobile RN receives a location update request message sent by the UE.

Step 503: The mobile RN sends an uplink UE related S1AP message to the core network device, where the uplink UE related S1AP message carries the address information of the mobile RN.

Preferably, the identity of the mobile RN includes a specific range of base station identifiers, or includes a base station identity and a mobile RN type.

The above is the implementation of the location update process from both the core network device and the mobile RN. The following describes the implementation process of determining and saving the mobile RN identity in combination with the two sides.

Referring to FIG. 6, in the embodiment, when the uplink UE related S1AP message carries the identifier of the mobile RN, the method for determining and saving the mobile RN identifier is as follows:

Step 601: The UE sends a location update request message to the mobile RN through an air interface.

Step 602: The Mobile Relay sends its own mobile RN identity and location update request message to the core network device by using the uplink UE related S1AP message. (The specific uplink UE related S1AP message includes an "Initial UE Message" message or an "Uplink NAS Transport" message. For details, refer to 3GPP TS 36.413). There are multiple types of mobile RNs. For example, the network can reserve a dedicated e B (Evolved Base Station) ID range as the mobile RN identifier, which is specifically configured for use by the mobile RN. For the eNB ID definition, refer to 3GPP TS36.413. The MME is based on the range of the eNB ID. The mobile RN and the normal eNB are distinguished. For example, the mobile RN identifier is composed of two parts, including an existing eNB ID part and a mobile RN type indication part, where the mobile RN type indication is used to indicate that the current device type is a mobile RN.

Step 603: The core network device saves the received mobile RN identifier in the context of the UE.

Referring to FIG. 7, in the embodiment, when the uplink UE related S1AP message carries the address information of the mobile RN, the method for determining and saving the mobile RN identifier is as follows:

When the mobile RN establishes an S1 interface (the interface between the access network and the core network), the mobile RN sends its own identity to the core network device, and the core network device saves the mobile RN identity to the context of the mobile RN, and receives the The message identified by the mobile RN obtains the address information of the mobile RN. There are many types of mobile RNs, such as the network can be pre- The dedicated eNB ID range is specifically configured for the mobile RN as the mobile RN identity. For the eNB ID definition, refer to 3GPP TS36.413. The core network device distinguishes the mobile RN from the normal eNB according to the range of the eNB ID. It consists of two parts, including an existing eNB ID part and a mobile RN type indication part, where the mobile RN type indication is used to indicate that the current device type is a mobile RN.

Step 701: The UE sends a location update request message to the mobile RN through an air interface.

Step 702: The mobile RN sends a location update request message to the MME by using an uplink UE related S1 AP message. The location update request message carries the address information of the mobile RN. The specific content of the specific uplink UE related S1AP message can be found in 3GPP TS36.413 ₀

Step 703: The core network device saves the previously saved mobile RN according to the address information of the mobile RN corresponding to the S1 interface of the received S1 AP message source, and the identity and address information of the mobile RN obtained when the S1 interface is established. The identity is saved in the context of the UE.

Referring to FIG. 8, the method for updating the UE context after the UE moves out of the coverage area of the mobile RN in this embodiment is as follows:

The UE moves from the mobile RN to the base station.

Step 801: The UE sends a location update request message to the e B through the air interface.

Step 802: The eNB sends a location update request message to the core network device by using an S1AP message related to the uplink UE. For details of the specific uplink UE related S1AP message, refer to 3GPP TS36.413.

Step 803: The core network device determines that the UE moves out of the mobile RN by querying the context of the UE, and deletes the identifier information of the mobile RN that the UE last successfully accessed by the UE in the context.

After determining and saving the identity of the mobile RN, the core network device can determine whether the UE to be paged is camped on the mobile RN according to the paging process, and perform a corresponding paging process.

Referring to FIG. 9, the method for paging a UE in this embodiment is as follows:

Step 901: The core network device determines, according to the trigger condition, that a paging process needs to be initiated for the UE in the idle state. The trigger conditions include: "downstream data arrival" and "call request received by the called core network during the voice call".

Step 902: The core network device determines, according to the context of the UE, whether the UE resides under the mobile RN. The specific method includes: One method is to configure a special TAI (Tracking Area Identity) or TAI range for the mobile RN of the entire network, that is, the mobile RNs of the entire network share a specific TAI or allocate several specific TAIs. For the mobile RN of the entire network, instead of assigning a unique TAL to each mobile RN, the specific TAI can only be used by the mobile RN and the UE camping on the mobile RN, and the UE carries the TAI in the reported location update request, and the core network After the device receives it, it is saved in the context of the UE. The core network device determines whether the UE resides under the mobile RN according to the TAI currently registered by the UE. Another method is that the core network device determines whether the UE resides under the mobile RN according to whether the identity of the mobile RN is saved in the UE context. Step 903: If yes, the core network device sends a paging message to the corresponding mobile RN according to the identifier of the mobile RN saved in the context of the UE.

If not, the core network device sends a paging message to all base stations configured with the TAI according to the TAI information stored in the context of the UE. For LTE (Long Term Evolution) systems, paging at the granularity of TA, for systems such as GSM (Global System for Mobile communication) or UMTS (Universal Mobile Telecommunication System), Paging is performed at the granularity of the location area.

The process of determining the mobile RN and paging the UE is described above. The process is mainly implemented by the core network device and the RN. The internal structure and functions of the two devices are described below.

Referring to FIG. 10, the core network device in this embodiment includes: an interface module 1001 and a control module 1002. The core network device is the MME for the LTE system and the subsequent evolved system. For GSM or UMTS systems, the core network equipment includes MSC (Mobile Switching Center) and SGSN (Serving GSN, Serving GPRS Support Node; GPRS: General Packet Radio Service).

The interface module 1001 is configured to receive an uplink UE related S1AP message sent by the mobile RN in the location update process, where the control module 1002 is configured to determine, by using an uplink UE related S1AP message, an identifier of the mobile RN that sends the uplink UE related S1AP message, and The identity of the mobile RN is saved in the context of the UE associated with the uplink UE related S1AP message.

Preferably, if the uplink UE related S1AP message carries the identifier of the mobile RN, the control module 1002 directly determines the identity of the mobile RN that sends the uplink UE related S1AP message by using the uplink UE related S1AP message.

Preferably, the interface module 1001 is further configured to obtain the identifier and address information of the mobile RN in the process of establishing a connection with the mobile RN. Correspondingly, if the uplink UE related S1AP message carries the address information of the mobile RN, the control module 1002 determines the address information of the mobile RN that sends the uplink UE related S1AP message by using the uplink UE related S1AP message, and determines the mobile RN by using the address information. Logo.

Preferably, the identifier of the mobile RN is a specific range of base station identifiers, or includes a base station identifier and a mobile RN type. The interface module 1001 is further configured to receive an uplink UE related S1AP message sent by the base station in the location update process. The control module 1002 is further configured to query a context of the UE related to the uplink UE related S1AP message, and if the identifier of the mobile RN is queried, delete the identifier of the mobile RN saved in the UE context.

Referring to FIG. 11, the RN includes: a user interface module 1101 and a network interface module 1102.

The user interface module 1101 is configured to receive a location update request message sent by the UE.

The network interface module 1102 is configured to send an uplink UE related S1AP message to the core network device, where the uplink UE related S1 AP message carries the identifier of the mobile RN. or:

The network interface module 1102 is configured to send its own identifier and address information to the core network device when establishing a connection with the core network device.

The network interface module 1102 sends an uplink UE related S1AP message to the core network device, and the uplink UE related S1AP message carries the address information of the mobile RN.

Preferably, the identifier of the mobile RN is a specific range of base station identifiers, or includes a base station identifier and a mobile RN type. During the paging process, the core network device further includes: a trigger module 1003, as shown in FIG.

The triggering module 1003 is configured to determine, according to the triggering condition, that a paging process needs to be initiated for the UE in an idle state.

The control module 1002 is configured to determine, according to the context of the UE, whether the UE resides under the mobile RN. Specifically, the control module 1002 determines whether the tracking area identifier TAI dedicated to the mobile RN is stored in the context of the UE, and if yes, determines that the UE resides under the mobile RN. Alternatively, the control module 1002 determines whether the identity of the mobile RN is stored in the context of the UE, and if so, determines that the UE resides under the mobile RN.

The interface module 1001 is configured to: when the determination is yes, send a paging message to the corresponding mobile RN according to the identifier of the mobile RN stored in the context of the UE.

The interface module 1001 is further configured to: when the determination is no, send a paging message to all the base stations configured with the TA identifier according to the TA identifier information saved in the context of the UE.

In the embodiment of the present invention, when the core network device needs to page to the UE in the idle state, it is determined whether the UE is camped on the mobile RN, and if yes, sends a paging message to the mobile RN instead of all in the TA. The base station sends a paging message. The paging problem of the idle state UE in the mobile RN is solved, and the paging message is sent to the specific RN, thereby saving network resources. The core network device needs to determine the identity of the mobile RN during the location update process before sending the paging message to the mobile RN. In the embodiment of the present invention, the core network device may directly obtain the identifier of the mobile RN in the location update process, or move the identifier of the RN in the process of establishing a connection with the mobile RN. The mobile RN can identify its own identity in a variety of ways, and its identity can be a specific range of base station identity or consists of base station identity and mobile RN type information.

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

The present invention is directed to a flowchart of a method, apparatus (system), and computer program product according to an embodiment of the present invention. And / or block diagram to describe. 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.

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

Claims

Rights request

A method for obtaining relay node RN information, comprising: the following steps:

The core network device receives the uplink user equipment sent by the mobile RN in the location update process, and the UE related SI interface application protocol S1AP message;

The core network device determines, by using an uplink UE related S1AP message, an identifier of the mobile RN that sends the uplink UE related S1AP message, and saves the identity of the mobile RN to the context of the UE related to the uplink UE related S1AP message.

The method of claim 1, wherein the step of determining, by the core network device, the identity of the mobile RN that sends the uplink UE related S 1 AP message by using the uplink UE related S1AP message includes:

If the uplink UE related S1AP message carries the identifier of the mobile RN, the core network device directly determines, by using the uplink UE related S1AP message, the identifier of the mobile RN that sends the uplink UE related S1AP message; or

If the uplink UE related S1AP message carries the address information of the mobile RN, and the core network device obtains the identity and address information of the mobile RN in the process of establishing a connection with the mobile RN; the core network device determines by using the uplink UE related S1AP message. The address information of the mobile RN that sends the uplink UE related S1AP message, and determines the identity of the mobile RN by using the address information.

3. The method according to claim 2, wherein the identifier of the mobile RN is a specific range of base station identifiers, or includes a base station identifier and a mobile RN type.

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

If the core network device receives the uplink UE-related S1AP message sent by the base station in the location update process, the core network device queries the context of the UE related to the uplink UE-related S1 AP message, and if the identifier of the mobile RN is queried, The identity of the mobile RN saved in the UE context is deleted.

5. A method for extracting RN information, comprising the steps of:

The mobile RN receives a location update request message sent by the UE;

The mobile RN sends an uplink UE related S1AP message carrying the identity of the mobile RN to the core network device.

The method according to claim 5, wherein the identifier of the mobile RN is a specific range of base station identifiers, or includes a base station identifier and a mobile RN type.

7. A method for extracting RN information, comprising the steps of:

The mobile RN sends its own identity and address information to the core network device when establishing a connection with the core network device. After receiving the location update request message sent by the UE, the mobile RN sends the uplink information carrying the address information of the mobile RN to the core network device. UE related S 1 AP message.

The method according to claim 7, wherein the identifier of the mobile RN is a specific range of base station identifiers Knowledge, or include base station identity and mobile RN type.

A method for paging a UE, comprising the steps of:

The core network device determines, according to the context of the UE, that the UE camps on the mobile RN, and sends a paging message to the corresponding mobile RN according to the identifier of the mobile RN saved in the context of the UE.

The method according to claim 9, wherein the determining, by the core network device, that the UE resides under the mobile RN according to the context of the UE includes:

The core network device stores, in the context of the UE, a tracking area identifier 专用 dedicated to the mobile RN, determining that the UE resides under the mobile RN; or

The core network device maintains an identity of the mobile RN in the context of the UE, determining that the UE resides under the mobile leg.

The method according to claim 9, wherein the method further comprises the steps of:

The core network device determines, according to the context of the UE, that the UE camping is not in the mobile RN, and sends a paging message to all base stations configured with the UI identifier according to the tracking area identifier information stored in the context of the UE.

12. A core network device, comprising:

An interface module, configured to receive an uplink UE related SI 发送 message sent by the mobile RN in the location update process, where the control module is configured to determine, by using an uplink UE related S1AP message, an identifier of the mobile RN that sends the uplink UE related S1AP message, and The identity of the RN is saved in the context of the UE associated with the uplink UE related S1AP message.

The core network device according to claim 12, wherein the control module is specifically configured to: if the uplink UE related S 1 ΑΡ message carries the identifier of the mobile RN, directly determine by using the uplink UE related S 1 ΑΡ message The identity of the mobile RN transmitting the uplink UE related S 1 ΑΡ message; or

If the uplink UE related S1 ΑΡ message carries the address information of the mobile RN, obtain the identity and address information of the mobile RN in the process of establishing a connection with the mobile RN, and determine, by using the uplink UE related S1AP message, the mobile of the uplink UE related S1AP message. The address information of the RN, and the identity of the mobile RN is determined by the address information.

The core network device according to claim 12, wherein the interface module is further configured to: receive an uplink UE related S1AP message sent by the base station in the location update process; and the control module is further configured to query the uplink UE The context of the UE related to the S1AP message, if the identifier of the mobile RN is queried, the identifier of the mobile RN saved in the context of the UE is deleted.

15. A mobile RN, comprising:

a user interface module, configured to receive a location update request message sent by the UE; And a network interface module, configured to send, to the core network device, an uplink UE related S1 AP message carrying the identifier of the mobile RN.

16. A mobile RN, comprising:

The network interface module is configured to send the identifier and address information of the core network device to the core network device when the connection is established with the core network device, and send the mobile device to the core network device to carry the mobile device after receiving the location update request message sent by the UE. The uplink UE related S 1 AP message of the address information of the RN.

17. A core network device, comprising:

And an interface module, configured to send, by the control module, the UE to camp on the mobile RN, and send a paging message to the corresponding mobile RN according to the identifier of the mobile RN saved in the context of the UE.

The core network device according to claim 17, wherein the control module is specifically configured to: store, in a context of the UE, a tracking area identifier TAI dedicated to the mobile RN, and determine that the UE resides in the mobile RN. Under; or

The identity of the mobile RN is stored in the context of the UE, and it is determined that the UE resides under the mobile RN.

The core network device according to claim 17, wherein the interface module is further configured to: determine, according to a context of the UE, that the UE camping is not in the mobile RN, and save according to the context of the UE.

The TA identification information is sent to all base stations configured with the TA identifier.