Wireless heterogeneous network system and uniform position management method for wireless heterogeneous networks

Abstract

The invention provides a wireless heterogeneous network system capable of realizing the uniform position management of wireless heterogeneous networks simply and effectively and a uniform position management method for the wireless heterogeneous networks. The wireless heterogeneous network system comprises respective heterogeneous networks, subscriber terminals, a uniform mobile management database and upper gateways, wherein each upper gateway corresponds to each heterogeneous network and comprises a position updating module and a call processing module; the uniform mobile management database is only used for storing geographical position coordinates of the subscriber terminals, without placing all network position information of the subscriber terminals, so that requirements for a database node are lowered; and any network can be selected to report in the position updating process, without updating positions of all accessed networks, so that the expenditure on resources of wireless links is reduced.

Description

technical field [0001] The invention belongs to the use of wireless heterogeneous network technology, and in particular relates to the mobility management of users in the heterogeneous network. Background technique [0002] In the past 10 years since the development of mobile communication from 2G to 3G, many different wireless transmission technologies have been produced, such as GSM (Global System for Mobile Communications, a technical standard for the second generation of wireless communication), CDMA (Code Division Multiple Access, A second-generation wireless communication technical standard), WCDMA (Wideband Code Division Multiple Access, a third-generation wireless communication technical standard), CDMA2000 (Code Division Multiple Access 2000, a third-generation wireless communication technical standard ), TD-SCDMA (Time Division Synchronous Code Division Multiple Access, a third-generation wireless communication technical standard), 802.11a / b / g, etc., and currently ...

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Problems solved by technology

[0004] Most of the existing and widely used location management technologies are proposed for homogeneous networks, and are not fully applicable to hybrid networks composed of heterogeneous networks.

[0005] In view of the characteristics of network heterogeneity, existing scholars have also proposed many solutions: some scholars proposed to join the Internet gateway for corresponding processing to adapt to the location management method of heterogeneous networks with mixed networks (see literature Assouma, A.D., Beaubrun, R ., Pierre, S.. Mobility management in heterogeneous wireless networks [J] IEEE Journal on Selected Areas in Communications, 2006, 24(3): 638-648), but this method needs to establish devices between two networks, which is too complicated , the scalability of the network is not good; there is also a unified mobility management (UMM) technology proposed, which uses a super database (super HLR) to achieve multi-protocol location management, and the central management node at the UMM end will store each All network location information such as the GSM location area of ​​the mobile user, the home agent address of the MIP (Mobile Internet), and the target router address of the WLAN (Wireless Local Area Network) need to be updated for all access networks when updating the location of the mobile user. Location management operation, (see literature Haase, O., Ming Xiong; Murakami, K. Multi-protocol profiles to support user mobility across network technologies [C]. Proceedings of the 2004IEEEInternational Conference on Mobile Data Management, 2004: 100-105), Although this method better realizes the location management function of the heterogeneous network, it needs to re-establish a central management node with high performance requirements. The data storage scale of the central management node is large and the cost is high; when updating the location The overhead of the wireless link is large, and it does not have good scalability

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