Method for building X2 interface between family base stations in long term evolution (LTE)

Abstract

The invention relates to a method for building an X2 interface between family base stations in long term evolution (LTE), which comprises the following steps that: a mobility management entity (MME) receives enhanced node (eNB) configuration transmission messages sent by home enhanced node (HeNB)-1 and sends the eNB identity (ID) and TAI carried in the eNB configuration transmission messages to the HeNB gateway (GW) through the MME configuration transmission message; the HeNB GW receives the MME configuration transmission message sent by the MME and returns the transmission network layer (TNL) address of the HeNB-2 to the HeNB-1 or returns the TNL address of the HeNB GW to the HeNB-1 according to the MME configuration transmission message; when the TNL address of the HeNB-2 is received by the HeNB-1, the X2 interface building request is sent to the HeNB-2, and a direct X2 interface is built with the HeNB-2; when the TNL address of the HeNB GW is received by the HeNB-1, the X2 interface building request is sent to the HeNB GW, and an indirect X2 interface is built with the HeNB-2. The method provided by the invention has the advantage that the condition that the execution connection type of the HeNB GW can not be distinguished in the network structure simultaneously with the direct X2 interface connection and the indirect X2 interface connection can be avoided.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for establishing an X2 interface between home base stations in LTE. Background technique [0002] 3GPP introduces the concept of home base station HeNB. Home base station is a kind of low power, which is suitable for users with fixed target groups in a limited environment, such as home, campus network, enterprise network and so on. The HeNB can be connected to the EPC through the home base station gateway HeNB GW, or can be directly connected to the EPC, which is completely determined by the operator and is not mandatory. There are 3 types of existing femtocells: [0003] Open mode HeNB: From the perspective of UE, it is no different from ordinary eNB, and does not need access control of closed user group CSG. [0004] Mixed-mode HeNB: It can serve both CSG member UEs and non-CSG member UEs; CSG member UEs have higher priority when accessing mixed-mode He...

AI Technical Summary

Problems solved by technology

[0030] To sum up, when there are network architectures with direct X2 interface connections and network architectures with indirect X2 interface connections at the same time, for HeNB GW, sometimes it is impossible to distinguish which connection should be used for execution.

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