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Method and system for achieving mobility management of evolved packet core network

A network implementation and grouping core technology, applied in network data management, transmission system, electrical components, etc.

Inactive Publication Date: 2014-04-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In view of this, the main purpose of the present invention is to provide a method and system for implementing mobility management in an EPC network, to solve the coordination problem of two control network elements caused by the change of control network elements caused by UE movement

Method used

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  • Method and system for achieving mobility management of evolved packet core network
  • Method and system for achieving mobility management of evolved packet core network
  • Method and system for achieving mobility management of evolved packet core network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] This embodiment implements the method for implementing mobility management in the EPC network, such as Figure 5 As shown, the method includes:

[0118] Step 301, the UE initiates a TAU request after leaving the area specified by the TAI list;

[0119] Step 302, the first MME selected by the first eNB for the UE finds the second MME according to the GUTI, and sends a context acquisition message to it, and the second MME replies with the context information of the UE, including the mobility management context and the session management context, and provides a context for the UE Information about the second control network element of the service;

[0120] In this step, the second MME identifies the second control network element as serving the PGW; the first MME identifies the first control network element as serving the SGW.

[0121] Step 303: The first MME determines whether to select the first control network element according to the current access location of the UE...

Embodiment 2

[0133] This embodiment implements the method for implementing mobility management in the EPC network, such as Figure 6 As shown, the method includes:

[0134] Step 401, the second eNB determines that it can no longer serve the UE according to the measurement information reported by the UE, and the second eNB selects an appropriate first eNB to switch over; the second eNB exchanges radio bearer information with the first eNB Perform resource reservation to complete the handover preparation phase;

[0135] Step 402, when the UE is attached to the first eNB, send a PathSwitch Request (PathSwitch Request) message to the first MME, informing the UE that the cell has been changed;

[0136] Step 403: The first MME determines whether to reselect the first control network element according to the location information of the first eNB to which the UE is currently attached. When the location information of the first eNB has exceeded the control area of ​​the second control network elem...

Embodiment 3

[0148] This embodiment implements the method for implementing mobility management in the EPC network, such as Figure 7 As shown, the method includes:

[0149] Step 501, the UE, the second eNB, and the second SGW transmit uplink and downlink data of the UE.

[0150] Step 502, the second eNB determines that it can no longer serve the UE according to the measurement information reported by the UE, and the second eNB sends a handover request message to the second MME, carrying the identity information of the first eNB to be handed over;

[0151] Step 503, the second MME selects the first MME according to the identification information and topology relationship of the first eNB, and sends the location information of the first eNB, the mobility management and bearer context of the UE, and the information of the second control network element serving the PGW to the second MME - MME;

[0152] Step 504: The first MME determines whether to reselect the first control network element a...

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Abstract

The invention discloses a method for achieving mobility management of an EPC network. The method comprises the steps that a first control network element carries out addressing on a second control network element according to an identification or address information of the second control network element, obtains the address of a PGW distributed to the second control network element and TEID information of the PGW, and sends the address of a first SGW and TEID information of the first SGW to the second control network element, wherein the identification or the address information of the second control network element is sent by a first MME, and the first SGW is distributed to the first control network element; the first control network element sends flow table information with the PGW address and the TEID information of the PGW to the first SGW; the second control network element sends flow table information with the first SGW address and the TEID information of the first SGW to the PGW. The invention further discloses a system for achieving mobility management of the EPC network. According to the scheme, the problem that due to the fact that UE moves, the control network elements are changed, and need to be coordinated can be solved.

Description

technical field [0001] The present invention relates to the mobility management technology of the 3rd Generation Partnership Project (3GPP), in particular to a method and system for implementing mobility management in an Evolved Packet Core (EPC, Evolved Packet Core) network. Background technique [0002] Stanford University in the United States proposed the Open Flow protocol in 2008. This protocol adopts a forwarding / control separation architecture. The external control plane entity uses the Open Flow protocol to control the forwarding plane equipment to realize various forwarding logics. The flow table issued by the controller performs controlled forwarding, and its behavior is standardized. For example, after receiving a message, take out the L2 / L3 / L4 related field values ​​in the message header and use them as keywords to search the flow table. After an entry, the message field is transformed according to the instruction set in the entry content, and then forwarded to a...

Claims

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Application Information

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IPC IPC(8): H04W8/02H04W8/26H04L45/74
CPCH04W8/02H04L45/745H04W36/302H04W36/322H04W72/20H04W36/0033H04W36/30H04W36/32H04W88/08
Inventor 王静周娜梁爽
Owner ZTE CORP
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