System and method of interconnection between network of universal mobile communication system and evolution network

Abstract

The system comprises UMTS network and evolving network. In UMTS network, UMTS is connected to the evolving packet core network in the evolving network, and the two-mode UE accesses the packet core network through UTRAN in UMTS network. By the invention, if the UTRAN is interconnected with the evolving packet core network, when UE is switched or roams between the UMTS network and evolving network, the mobility management and session management of two-mode UE can executed by evolving packet core network so as to greatly improve the efficiency of mobility management and session management; when two-mode UE moves from evolving access network to the area covered by UMTS network, only thing to do is establishing a data link between evolving packet core network and UTRAN so as to reduce the number of node devices on the data link and shorten the switching time between the evolving network and UMTS network.

Description

technical field [0001] The present invention relates to network interconnection technology, in particular to a system and method for interconnecting a Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications System) network and an evolutionary network. Background technique [0002] The UMTS network is a wireless communication network technical standard defined by the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project), and four versions R99, R4, R5 and R6 have been released. [0003] FIG. 1 shows a schematic diagram of a network of an existing UMTS network. As shown in FIG. 1 , the UMTS network is composed of a core network (CN, Core Network) and a UMTS terrestrial radio access network (UTRAN, UMTS Terrestrial Radio Access Network). CN includes two parts, circuit domain and packet domain, wherein, circuit domain includes mobile switching center (MSC, Mobile Switch Center) / visiting location register (VLR, Visiting Locatio...

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Problems solved by technology

[0012] According to the above description, in order to ensure that the dual-mode UE can perform handover and roaming within the UMTS network and between the UMTS network and the evolved network, both the SGSN and the evolved packet core network need to perform mobility management, and they need to cooperate with each other. Not only increases the signaling of the Gn interface, but also reduces the efficiency of mobility management

In addition, when the dual-mode UE moves from the evolved access network to an area covered by only the UMTS network, it will perform inter-system handover to ensure service continuity. At this time, it is necessary to establish the Gn interface and There are two data links on the Iu interface between UTRAN and SGSN, which will undoubtedly increase the handover time, and 3GPP has strict requirements on the handover time between systems

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