The Ad Hoc Emergency Communication Model With Cellular Network

Wireless network was becoming more and more important in the field of communication science since 1970s. It can be categorized into two: one is center-controlled network such as Wireless Local Area Network, the other is self-organized wireless network with no access points such as Ad hoc network. The Ad hoc mobile wireless network is receiving increasing attention and application due to its mobility and convenience it can provide to people.Wireless Ad hoc Network owns some characteristics like self-organization, multi-hop and a frequently-changed topology. The uniqueness of Wireless Ad hoc Network makes it impossible to adopt the technologies utilized in traditional networks. So some new protocols and technologies need to be developed specially for Ad hoc network on channel access, routing protocol and power control. The article research point is: media access control, route protocol and the power control, with Cell communication.The article purpose is building a temporary Ad hoc communication with easy and fast under urgency condition, and the Ad hoc network can communicate with the cell network.,With the article, the author expatiate the urgency communication model with cell network viewpoint. The article's key is the cluster arithmetic base the geography information, which can prolong the Ad hoc network lift time with the new design MAC, mobile manage and the route layer.Author prove the new design network structure have the more excellence performance than the traditional IEEE802.11 DCF , including the more network life time. The article had a good theory base for making the ad hoc network product which is the author's future target.