A mobility management method, device and system

Abstract

Embodiments of the present invention disclose a mobility management method, device and system, which relate to the field of communications and improve handover performance in the mobility management process. The specific solution is: when the UE moves from the cell covered by the first access network node to the cell covered by the second access network node, the second access network node receives the handover request sent by the first access network node through the X2 connection; The second access network node sends a handover request confirmation to the first access network node through the X2 connection, so that the first access network node and the second access network node execute the handover execution process; the second access network node determines that it needs to communicate with the An MME establishes a dynamic S1 connection; a second access network node establishes a dynamic S1 connection with the first MME; and the second access network node initiates a path switching process to the first MME through the dynamic S1 connection. The invention is used in the process of mobility management.

Description

technical field [0001] The present invention relates to the communication field, in particular to a mobility management method, device and system. Background technique [0002] The 3rd Generation Partnership Project Evolved Packet System (3GPP EPS) consists of Evolved Packet Core (EPC), Evolved-Universal Terrestrial Radio Access Network, E-UTRAN) and user equipment (User Equipment, UE) are composed of three parts. Among them, the E-UTRAN may include multiple access network nodes (such as base stations), and the EPC may include core network nodes (such as Mobile Management Entity (Mobile Management Entity, MME), Serving Gateway (Serving Gateway, SGW)). The network access nodes are connected through the X2 interface, and each access network node can be connected with the core network node through the S1 interface. [0003] In order to realize flexible load sharing and good disaster recovery function, EPS introduces 3GPP pool (Pool) technology. Specifically, several MME pool...

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Problems solved by technology

[0004] There are at least the following problems in the prior art. When the UE leaves the radio resource coverage of the current MME Pool, the EPS needs to initiate a handover based on the S1 interface, and the base station needs to reselect the core network node that provides services for the UE. When the UE leaves the radio resource coverage area of ​​the current MME Pool, compared with the handover based on the X2 interface initiated by the EPS, the handover based on the S1 interface requires more signaling interactions in the core network, so that when the UE leaves the current When the wireless resources of the MME Pool cover the range, the handover operation is prolonged and the complexity is high, resulting in poor handover performance

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