The Research On Handoff And Inter-communication Of Hybrid Wireless Networks Based On Internet

With the rapid development of mobile communication technology and Internet technology, and the vast requirement of mobile data service ,based on the far-reaching knowledge of all kinds wireless networks technology, this paper deeply studies the inter-communication of hybrid wireless networks, mostly discusses the relevant handoff technology of inter-connecting hybrid wireless networks based on Internet.The article studies the problem about hybrid wireless networks how to access to Internet ,so as to be connected with each other, and emphases on handoff technology in kindred networks and between hybrid networks, what's more, introduces the schemes on how to design wireless data-link layer supporting wireless Internet. Realizing the mobility on Internet, all sorts of wireless networks acting as accessing networks ,IP networks being as core ones, all these are the developing tendency of the next networks communication technology. This paper explains the necessity of inter-connections of hybrid wireless networks. Based on the solutions of inter-connecting by protocol transformer ,proposes inter-connecting scheme based on Internet, introduces the designing methods of wireless networks gateway. Also gives two application examples about WLAN and cellular mobile communication systems how to access to Internet. At last shows the features of next networks.Basing on the connections with Internet, the paper discusses the problem of handoff in kindred frame, excepting introducing handoff principle and algorithm knowledge ,deeply studies the admission control algorithm based on the concept of residual capacity path-loss ratio . This algorithm considers not only minimum path of loss but also capacity in cells, improves system performances and service quality.Due to all sorts of wireless networks connecting to IP core networks, as admission ones, this article also studies the problem of handoff between hybrid wireless networks. Mobile IP is a solution scheme in support of mobility on Internet, thus the handoff mechanism on mobile IP can be adopted to hybrid wireless networks. Mobile phone often stays among the covering of two or several kinds wireless networks, may step from one networks into another, it is needed to solve the multi-services admission control problem when handoff happens, which can guarantee the quality of existed links and maximize the system performance.There exists much difference between wire and wireless data link layer , at length,the paper discusses the problem of how to design wireless data link-layer, with the aim of enhancing the communication quality and better meeting with admission to Internet. Handoff technology is a practical project , involved wide knowledge category and technology content , relating to networks fame , mobile terminal , user service grade and other factors. Many problems need to be further studied, and this article solves the problem of inter-connection and inter-communication, which has certain theoretical and practical significance to different communication companies.