Method and apparatus for establishing x2 link

Abstract

An embodiment of the present invention provides a method and a device for establishing an X2 link. The method comprises the steps as follows: a first base station sends an X2 link establishing request message to a second base station for requesting to establish the X2 link between the first base station and the second base station; wherein the X2 link establishing request message comprises an identification of a first MME (Mobility Management Entity) and an identification of a first SGW (Serving Gateway) which are corresponding to the first base station; the first base station receives an X2link establishing response message which is returned by the second base station according to the X2 link establishing request message in order to establish the X2 link; and wherein the X2 link establishing response message comprises an identification of a second MME and an identification of a second SGW which are corresponding to the second base station. According to the embodiment of the presentinvention, the first base station and the second base station can respectively obtain the MME and the SGW corresponding to the opposite terminal in the process of X2 link establishing, thus when UE (User Equipment) switches between the first base station and the second base station, the first base station or the second base station can make an accurate switching adjudgement.

Description

technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular, to a method and device for establishing an X2 link. Background technique [0002] In normal LTE (Long Term Evolution, long-term evolution) network deployment, multiple eNBs (evolved Node Base, evolved base station) can be connected to the same MME (Mobility Management Entity, mobile management entity), and the MME can be connected to multiple SGWs (Serving Gateway , service gateway). When each eNB accesses the MME, the MME allocates an SGW for the eNB. When a UE moves between two eNBs, that is, when the UE moves from the source eNB to the target eNB, the UE needs to perform handover between the two eNBs. The specific handover method is determined by the two eNBs and the SGW The connection relationship is determined. [0003] However, in the existing technology, the source-side eNB cannot know the connection between the target-side eNB and t...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing technology, the source-side eNB cannot know the connection between the target-side eNB and the SGW. Therefore, the source-side eNB cannot accurately determine which handover mode to perform, resulting in partial handover judgment errors and handover failures.

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