| Ad hoc network is a kind of peer to peer wireless data network. The node in the net work acts as the sysRouter of its neighbors those in its direct transmission range. It is also called multi-hop network or self-organized network. Ad hoc network has characteristic of non-center, self-organized, fast deployable, mobile and multi-hop. In such a network, each mobile node operate not only as a host but also a sysRouter, forwarding packets for other mobile nodes in the network that may not be within direct wireless transmission range of each other. Each node participates in an ad hoc routing protocol that allows it to discover "multi-hop" paths through the network to any other node.In area in which there is little or no communication infrastructure or the existing infrastructure is expensive or inconvenient to use, wireless mobile user may still be able to communicate through the formation of an ad hoc network. Because of these characteristics, Ad hoc network is being paid much attention for using in military tactical communication with the architecture features or disaster relief area.In this research project, we design a digital multimedia radio system, including hardware and software system. The main contents of the paper, illustrate, design and implement of software system, as well as some relative theory problem. The design and implementation of software is illustrated in detail. The whole software of system is composed of two component: one is peer to peer wireless picture information transmission module, the other is routing protocol based SysRoute protocol, which is designed by us according to DSR routing protocols.This dessertation starts with totally conceptions of hardware and software of system, then go with the basic conceptions and characteristics of wireless mobile Ad hoc network, introduce the system structure of wireless mobile Ad hoc network, as well as a varities of Ad hoc protocols, then illustrate DSR protocol in detail. As the key technique of Ad hoc network, the routing protocol play a important roles. At present, many different protocols have been proposed to solve the multi-hop routing problem in ad hoc networks, each based on different assumptions and intuitions. After comparision and analyse between those typical routing protocols, we made a conclusion that: at the multimedia digital rado station platform designed by ourselves, the DSR(Dymantic Source SysRoute) may be the most suitable protocol.In addition to, during the process of design software system, by using of FIFO mechanism, which is one of method of interprocess of communication(IPC) in UNIX, software module can communication and data transmision very well, and control information has been transmitted well mutualy.In this paper, we also present some design idea, system communication framework based FIFO communication mechanism. During the process of writing coding, some main design principals are follwed: modularity, consistent data structure, readable code.At last, we conclude the works of the paper and point out the problem that need improving in relative fields. |
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