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Core network choosing method, device and system

A core network and public terrestrial network technology, applied in the field of communications, can solve problems such as NASTAU process failure, and achieve the effect of improving the recovery process

Inactive Publication Date: 2017-10-27
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a core network selection method, device and system to at least solve the problem in the related art that the PLMN of the terminal in the cell changes and the NAS TAU process often fails

Method used

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  • Core network choosing method, device and system
  • Core network choosing method, device and system
  • Core network choosing method, device and system

Examples

Experimental program
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Effect test

Embodiment 1

[0085] Figure 8 It is a flow chart according to the preferred embodiment 1 of the present invention, such as Figure 8 As shown, Cell 1 and Cell 2 both belong to two cells under one eNB, but support different PLMNs.

[0086] Step S801: UE performs a context suspension process in Cell 1 under the eNB;

[0087] Step S801: The UE moves from Cell 1 to Cell 2 under the same eNB in ​​the suspended state. After reading the broadcast of Cell 2, the UE finds that the PLMN supported by Cell 2 is different from that of Cell 1, but belongs to the EPLMN list of the UE. Initiate the TAU process;

[0088] Step S802: UE first sends an RRC recovery request message on Cell 2, the request message carries the PLMN information newly selected by the UE, and / or carries the previously registered MME information (GUMMEI);

[0089] Step S803: After receiving the request sent by the UE, the eNB first performs UE context search. After the search is successful, it judges that the PLMN information in the...

Embodiment 2

[0092] Figure 9 It is a flow chart according to the preferred embodiment 2 of the present invention, such as Figure 9 As shown, Cell 1 and Cell 2 both belong to two cells under one eNB, but support different PLMNs.

[0093] Step S901: UE performs a context suspension process in Cell 1 under the eNB;

[0094] Step S901: The UE moves from Cell 1 to Cell 2 under the same eNB in ​​the suspended state. After reading the broadcast of Cell 2, the UE finds that the PLMN supported by Cell 2 is different from Cell 1, but belongs to the EPLMN list of the UE. Initiate the TAU process;

[0095] Step S902: UE first sends an RRC recovery request message on Cell 2, the request message carries the PLMN information newly selected by the UE, and / or carries the previously registered MME information (GUMMEI);

[0096] Step S903: After receiving the request sent by the UE, the eNB first performs UE context search. After the search is successful, it judges that the PLMN information in the saved...

Embodiment 3

[0100] Figure 10 It is a flow chart according to the preferred embodiment 3 of the present invention, such as Figure 10 As shown, Cell 1 and Cell 2 both belong to two cells under one eNB, but support different PLMNs.

[0101] Step S1001: UE performs a context suspension process in Cell 1 under the eNB;

[0102] Step S1001: The UE moves from Cell 1 to Cell 2 under the same eNB in ​​the suspended state. After reading the broadcast of Cell 2, the UE finds that the PLMN supported by Cell 2 is different from that of Cell 1, but belongs to the EPLMN list of the UE, so the UE pre-initiates TAU process;

[0103] Step S1002: UE first sends an RRC recovery request message on Cell 2, the request message carries the PLMN information newly selected by the UE, and / or carries the previously registered MME information (GUMMEI);

[0104] Step S1003: After receiving the request sent by the UE, the eNB first performs UE context search. After the search is successful, it judges that the PLMN...

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Abstract

The invention provides a core network choosing method, device and system. The core network choosing method comprises that: a base station obtains an air interface recovery request message which is transmitted by a terminal initiating a recovery flow, wherein the air interface recovery message carries at least one of chosen public land network PLMN information and registered mobility management entity MME information; the base station searches contextual information of the terminal and the base station performs choosing on the MME when the chosen PLMN information is different from the PLMN information of the terminal which is stored by the contextual information, wherein the base station executes a current recovery process of the terminal on the basis of the chosen MME. The core network choosing method, device and system solve problems that the PLMN changes, wherein the terminal of the PLMN is in a cell and a process of NAS TAU is usually failed, and complete the recovery process under a user plane scheme.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a core network selection method, device and system. Background technique [0002] Narrow Band Internet of Things (NB-IOT) technology is mainly to improve indoor coverage. It is an IoT communication system with the characteristics of wide coverage, multiple connections, low speed, low cost, and low power consumption. [0003] In order to meet the requirements of a large number of users and low throughput, data transmission in the NB-IOT system is divided into two modes: Control Plane Mode and User Plane Mode. The data is carried in the Network Attached Storage (NAS for short) Protocol Data Unit (PDU for short) of the signaling for transmission. After the UE accesses, only the SRB (Signal Radio Bearer) is established, and the DRB (Data Radio Bearer) is not established. Radio Bearer); the latter uses the traditional DRB user plane for uplink and downlink data transmission, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/18H04W48/16H04W8/08H04W36/14H04W36/00H04W76/04
CPCH04W48/16H04W48/18H04W8/082H04W36/0033H04W36/0055H04W36/14
Inventor 刘静高音
Owner ZTE CORP
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