A Novel Service-Oriented Network Structure in Wireless Sensor Networks

Since one single node in a wireless sensor network (WSN) is quite power-limited, many of existing researches focus on abating the redundancy of transmission to achieve the goal of energy saving. However, they are mostly highly dependent on physical networks and routing, which will result in the excessive rawness of data, the great imbalance of energy consumption among nodes and the poor scalability of the network. To solve these problems, in this paper, with a number of brokers placed in the sensing domain, a service-oriented network structure is established by applying a networking algorithm based on routing distance. This network is distributed and self-organized, in which services are regarded as the units of node data and are forwarded within the network through the publish/subscribe communication model. Simulation results show that the network can efficiently locally process and transmit the services, manifesting a large advantage in energy saving and balance so as to extend the lifetime and applicability of the network.