| The Wireless Sensor Network(WSN) is a multi-hop network composed of a large numbers of micro-sensor nodes,which are organized by wireless communication.The nodes are usually used in given physical environment and are supplied by battery and their capability of data processing,data storage and data communication is very limited. So WSN must have self-organization and self-recovery ability.In this paper,we propose a simple self-organized protocol with the background of cultural relie's preservation.The system is composed of sensor node,repeat node, gateway node and PC.Every node can form a multi-hop,stable network through control information.Meanwhile,on the premise of ensuring signal intensity,nodes could select a route for transmitting data in accordance with the principle of minimum hops.To meet the low-power requirements,we select the ATmega128L single chip as computer and CC1100 single chip as transceiver to design sensor nodes.Three types crystal of 8MHz,26MHz and 32768Hz are selected for meeting the demands of computer and transceiver.The node is supplied by two high-energy batteries.The soft is written by C language,which implements the trustworthy communication between nodes.Self-organized protocol at the network layer of software architecture which primarily responsible for route discovery and maintenance and including the two basic functions:one is route selection,which is searching an optimal path between source node and destination node;another is data relay,which is forwarding the data correctly along the optimal path.When a communication route is invalid for some reasons,the protocol can search another communication route rapidly and automatically and ensure the reliability of data transmission. A WSN was built by a number of sensor nodes,repeat nodes and a gateway node, and separately the performance testing and functional testing were conduct.The whole system is stable and reliable,fully consistent with the design requirements. |
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