Design And Realization Of Code Distribution In Wireless Sensor Network Based On Tree Routing Topology

Wireless sensor technology, wireless communication technology and computer technology are three basic technologies in Modern information technology. The rapid development of three basic technologies helps to advance wireless sensor networks.Wireless sensor networks are composed of distributed sensor nodes which are small, limit energy, computing power and wireless communication. It is used in military, environmental monitoring, smart house and so on for high degree of autonomy. We have to update the code of the nodes after placing wireless sensors in order to adapt change of time and environment. It is important to distribute codes in wireless because there are so many nodes in wireless sensor networks and the nodes are placed in areas not easily getting. The article introduces the features of wireless sensor networks and the advantages and the disadvantages of several code distribution rules.We propose the detailed rules of code distribution based on tree routing topology which apply in the system of wireless and long distanced reading gas meter. It resulted in saving the work of fetching nodes, erasing and burning nodes frequently. In the end, we verify feasibility and correctness of code distribution this paper proposed on Mambo hardware (MSP430,CC2420)and software platform (TinyOS operating system).