Method, device and system for establishing S1 interface connection

Abstract

The present invention discloses a method, device and system for establishing S1 interface connections. The method includes that the S1 interface ends at a relay node RN, a donor base station DeNB forwards a S1 interface signaling between RN and a mobile management entity MME, so as to establish the S1 interface connection for DeNB between DeNB and the MME; a S1 interface connection for RN betweenthe DeNB and the MME is established; in a down direction, when the DeNB receives the S1 interface signaling from the S1 interface connection for the DeNB between the DeNB and the MME, the DeNB processes the Si interface signaling; when the DeNB receives the Si interface signaling from the S1 interface connection for the RN between the DeNB and the MME, the DeNB forwards the S1 interface signalingto the RN. According to the invention, it is capable of ensuring the DeNB to distinguish the S1 interface signaling transmitted by the MME.

Description

Technical field [0001] The present invention relates to LTE (Long Term Evolution) technology, and in particular to a method, equipment and system for establishing an S1 interface connection. Background technique [0002] LTE is the next evolution goal of the mobile broadband network standard defined by 3GPP (Third Generation Partnership Project), which can realize the efficient use of existing and future wireless frequency bands. The LTE system is composed of the CN (core network), the eNodeB (base station) of the access network and the UE (user equipment). Among them, the eNodeB of the RAN (radio access network) is connected to the network entity in the CN through the S1 interface. The UE and the eNodeB are connected through the Uu interface. [0003] In order to enhance the LTE system, a scheme of adding an RN (relay node) to the architecture of the LTE radio access network is currently proposed. The RN node is set between the UE and the eNodeB, which can be regarded as an exte...

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Problems solved by technology

[0007] According to the above description, it can be seen that in the prior art, when establishing the connection of the S1 interface between the RN and the MME, the existing S1 interface for the DeNB between the DeNB and the MME is modified and configured. This method makes An S1 interface between RN and MME should provide signaling services for DeNB and RN nodes in the radio access network at the same time. In the downlink direction, the signaling sent by MME to DeNB and the signaling sent to RN all pass through an S1 interface. The connection is delivered to the DeNB, and after receiving the signaling, the DeNB often cannot distinguish whether the signaling is sent to the DeNB or sent to the RN, which only needs to be forwarded by the DeNB, resulting in confusion and greatly affecting the service. accomplish

[0008] Further, in the prior art, since the DeNB and the RN share an S1 interface connection between the DeNB and the MME, the DeNB not only needs to maintain the context information of the UE directly connected to the DeNB itself, but also needs to Maintain the context information of each UE directly connected to the RN, etc., thus further increasing the complexity of service implementation

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