无线传感器网络MAC层协议TDMA—MAC的仿真分析与研究

Wireless Sensor network(WSN)，which is made by the convergence of sensor nested computation, networks and wireless communication technologies, is a novel technology about acquiring and processing information. It is a late-model wireless networks of infrastructureless network and can be used for testing, sensing, collecting and processing information of monitored objects. WSN is a new research area of computer science and technology and has a wide application future. Both academia and industries are very interested in it. Designing MAC protocol of WSN is the main part of this dissertation. As WSN, the energy of node is very important for network, due to the localization of node. So if we want to save the node energy to increase the lifetime of this node, we should design a MAC protocol of realizable and maximizing the save of energy. This dissertation is talking about a MAC protocol based on TDMA. TDMA MAC protocol is a protocol in what every node has its own slot. The node just can transmit and receive wait for its own slot, and in the other slot this node go into sleep. In this way, first it can avoid the collision, there wouldn’t be any clash, and then the node can go into sleep in time in the other slot not belong to it. Of course, it also has some disadvantage. For example the protocol must achieve a higher synchronization. But as the high sleep develop of the WSN, it is impossibility for one kind of MAC protocol to a sensor network in the future. It is more possible that a sensor network has two or more MAC protocol. Then we set up a model in the OPNET environment to emulate and analyse the protocol. By the emulation we prove that the TDMA MAC suit to the WSN. In the next step, we should compare this MAC protocol with others, and to prove its advantage.