Method, system and device for switching between networks, updating location area and establishing ISR

Abstract

The invention discloses a method, a system and a device for switching between networks, updating location area and establishing ISR, and belongs to the field of communication. The method comprises that: a terminal device judges an initiating condition meeting a location area update flow, and initiates the location area update flow to a mobility management network element in a target network, wherein the initiating condition of the location area update flow comprises that the terminal access technology is changed; a source network mobility management network element selects a mobility management network element, which is positioned in the target network and establishes the ISR with the source network mobility management network element, as a target mobility management network element; and a forward switching request is sent to the selected target mobility management network element. The method ensures that the target mobility management network element is registered in HSS and acquiressigned data, also ensures that terminal UE acquires novel temporary identity (P-TMSI / GUTI) allocated to the UE by the target mobility management network element so as to effectively guarantee the normal service of follow-up terminal UE.

Description

technical field

[0001] The invention relates to the communication field, in particular to a method, system and equipment for inter-network handover, location area update, and ISR establishment. Background technique

[0002] With the development of wireless communication technology, see figure 1 , provides a schematic diagram of a wireless evolution network architecture, wherein, when the core network of the wireless evolution network mainly includes MME (Mobility Management Entity, mobile management entity), SGW (Serving Gateway, serving gateway), PGW (PDN Gateway, Packet Data Network Gateway, packet data gateway) three logical functional bodies, among which, MME is a mobile management entity responsible for NAS (Non-Access-Stratum, non-access stratum) signaling and NAS signaling encryption, roaming, tracking and other functions, and assigns users temporary Identity identification, security functions, etc., the SGW is responsible for the local mobility anchor point and the ...

Examples

Embodiment 1

[0053] see Figure 4 , the embodiment of the present invention provides a location area update method in the inter-network handover process, a method for inter-network handover, the method is described by taking the terminal UE as an example to trigger the TAU process when it perceives that its own access technology has changed, the method The content is as follows:

[0054] Step 101: The source network and the target network establish preparations for the terminal UE to perform handover, and the target network acquires relevant information of the terminal UE, such as mobility management context and user plane bearer context information. The specific content is as follows:

[0055] 1-2. After the source network access network element decides to perform handover from the source network to the target access network, it sends a handover request Handover Request to the source network mobility management network element, and the handover request carries the identifier of the targe...

Embodiment 2

[0084] see Figure 7 , the embodiment of the present invention provides a method for handover between networks, the content of the method is as follows:

[0085] Step 201: After obtaining the handover request sent by the source network element, the mobility management network element of the source network sends a message to the source service gateway, and the message is used to obtain the mobility management network that has established an ISR with the mobility management network element of the source network Meta information, such as address / TEID (Tunnel Endpoint Identity, tunnel endpoint identifier) ​​and other information, this embodiment takes address information as an example.

[0086] The specific content is as follows:

[0087] 1. The source-side network decides to initiate a handover.

[0088] 2. The network element of the access network at the source side sends a handover request message to the mobility management network element of the source network, requesting to...

Embodiment 3

[0121] see Figure 9 The embodiment of the present invention provides a method for inter-network handover. The difference from Embodiment 2 is that in this embodiment, the mobility management network element of the source network itself stores the information of the mobility management network element with which the ISR is established. For ease of description, this embodiment is described by taking only one mobility management network element that has established an ISR with the mobility management network element of the source network as an example, and the specific content is as follows:

[0122] Step 301: The mobility management network element of the source access network obtains the handover request sent by the network element of the source access network, and obtains the mobility management network element list of the target network according to the network element identifier of the target access network carried in the handover request.

[0123] Step 302: The source mobi...

technical field

[0001] The invention relates to the communication field, in particular to a method, system and equipment for inter-network handover, location area update, and ISR establishment. Background technique

[0002] With the development of wireless communication technology, see figure 1 , provides a schematic diagram of a wireless evolution network architecture, wherein, when the core network of the wireless evolution network mainly includes MME (Mobility Management Entity, mobile management entity), SGW (Serving Gateway, serving gateway), PGW (PDN Gateway, Packet Data Network Gateway, packet data gateway) three logical functional bodies, among which, MME is a mobile management entity responsible for NAS (Non-Access-Stratum, non-access stratum) signaling and NAS signaling encryption, roaming, tracking and other functions, and assigns users temporary Identity identification, security functions, etc., the SGW is responsible for the local mobility anchor point and the ...

Examples

Embodiment 1

[0053] see Figure 4 , the embodiment of the present invention provides a location area update method in the inter-network handover process, a method for inter-network handover, the method is described by taking the terminal UE as an example to trigger the TAU process when it perceives that its own access technology has changed, the method The content is as follows:

[0054] Step 101: The source network and the target network establish preparations for the terminal UE to perform handover, and the target network acquires relevant information of the terminal UE, such as mobility management context and user plane bearer context information. The specific content is as follows:

[0055] 1-2. After the source network access network element decides to perform handover from the source network to the target access network, it sends a handover request Handover Request to the source network mobility management network element, and the handover request carries the identifier of the targe...

Embodiment 2

[0084] see Figure 7 , the embodiment of the present invention provides a method for handover between networks, the content of the method is as follows:

[0085] Step 201: After obtaining the handover request sent by the source network element, the mobility management network element of the source network sends a message to the source service gateway, and the message is used to obtain the mobility management network that has established an ISR with the mobility management network element of the source network Meta information, such as address / TEID (Tunnel Endpoint Identity, tunnel endpoint identifier) ​​and other information, this embodiment takes address information as an example.

[0086] The specific content is as follows:

[0087] 1. The source-side network decides to initiate a handover.

[0088] 2. The network element of the access network at the source side sends a handover request message to the mobility management network element of the source network, requesting to...

Embodiment 3

[0121] see Figure 9 The embodiment of the present invention provides a method for inter-network handover. The difference from Embodiment 2 is that in this embodiment, the mobility management network element of the source network itself stores the information of the mobility management network element with which the ISR is established. For ease of description, this embodiment is described by taking only one mobility management network element that has established an ISR with the mobility management network element of the source network as an example, and the specific content is as follows:

[0122] Step 301: The mobility management network element of the source access network obtains the handover request sent by the network element of the source access network, and obtains the mobility management network element list of the target network according to the network element identifier of the target access network carried in the handover request.

[0123] Step 302: The source mobi...

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