Method and device for paging terminal under mobile relay

Abstract

A method for paging a mobile relay terminal is proposed, including the following steps: a core network node obtains new location information of an RN relay node; an MME accessed by a UE obtains the location information of the RN from the core network node , determining a paging range for paging the UE, where the MME accessed by the UE initiates paging for the UE within the paging range. On the other hand, the embodiments of the present invention also provide a network side device. The above solution proposed by the present invention can reduce the scope of paging, avoid the waste of air interface resources, ensure that idle UEs under RN can also quickly perform directional paging, and at the same time ensure that UEs after paging can normally access services. The above-mentioned solution proposed by the present invention requires little modification to the existing system, does not affect the compatibility of the system, and is simple and efficient to implement.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular, the present invention relates to a method and equipment for paging a terminal under a mobile relay. Background technique [0002] figure 1 It is a schematic diagram of the existing LTE structure supporting RN (Relay Node, relay or relay node), such as figure 1 As shown, in the wireless access network of the LTE system, the radio resource management entity includes eNB macro base station 101 and RN102, and RN102 accesses the core network through another macro base station DeNB103. Among them, the eNBs 101 are connected through the X2 interface, and each eNB is connected to the MME (Mobility Management Entity, mobile management entity) and S-GW (Serving Gateway, serving gateway) 104 in the core network through the S1 interface; the RN 102 is connected through The Un interface accesses the DeNB 103 . DeNB 103 provides an X2 proxy (proxy) function between RN 102...

AI Technical Summary

Problems solved by technology

In the RN system architecture, such as figure 2 As shown, all the control and bearer of the RN are terminated at the IP layer of the DeNB protocol stack, that is, the MME-UE accessed by the idle UE cannot directly find the RN according to the address of the RN, and cannot determine the DeNB accessed by the RN

When an idle UE needs to be paged, since the MME-UE neither knows the current exact location of the UE nor the location of the RN that the UE accesses, it can only send a paging request to all DeNBs that the RN can pass along the line. Some railway lines span multiple cities and provinces, and there are a lot of DeNBs on the backhaul network along the line. All of them are paging, which is a great waste of paging resources, because the RN connected by the UE can only be connected to one DeNB at the same time, and all sending Paging to UE triggered by other DeNBs is a waste of resources

Images