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.
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Example Embodiment
[0116] Example one
[0117] This embodiment implements a method for implementing mobility management in an 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. The second MME replies to the context information of the UE, including the mobility management context and the session management context, and is the UE Information about the second control network element of the service;
[0120] In this step, the second MME identifies that the second control network element is served by the PGW; the first MME identifies that the first control network element is served by the SGW.
[0121] Step 303: The first MME determines whether to select the first control network element according to the current access position of the UE. Whe...
Example Embodiment
[0132] Example two
[0133] This embodiment implements a method for implementing mobility management in an EPC network, such as Image 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 for handover; the second eNB exchanges radio bearer information with the first eNB Perform resource reservation to complete the handover preparation phase;
[0135] Step 402: After the UE attaches to the first eNB, it sends a PathSwitch Request (PathSwitch Request) message to the first MME to inform 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 netwo...
Example Embodiment
[0147] Example three
[0148] This embodiment implements a method for implementing mobility management in an 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, which carries the identification information of the handover first eNB;
[0151] Step 503: The second MME selects the first MME according to the identification information and topology 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 first eNB. An MME;
[0152] Step 504: The first MME determines whether to reselect the first control network element ac...
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