Research On Cross-layer Improving Protocol For Wireless Sensor Networks

Wireless sensor networks which are integration of wireless communication techniques, sensor techniques, embedded computation techniques and distributed computation techniques have become a hot research area of computer science and technology [1,2,5]. Due to the great promise and potential in various applications, more and more academic researchers and people from industry are engaged in the research area, and the rapid development has lead to the emergence of several novel conceptual systems, such as wireless sensor and actor networks, multimedia sensor networks, and etc... Aming at the new features and development trend of wireless sensor networks, although energy efficient is still one of the most important challenges, other network performance such as throughput, latency minimization should also be considered because of the practical value. Hence, wireless sensor network protocol design must according to the specific application type, reduce network energy consumption as much as possible under the premise of ensuring system performance requirements.A cross-layer strategy that considers MAC layer and network layer jointly should be adopt to improve the performance of the network due to the fact that both the layers have an great effect on the performance of wireless sensor networks. Aiming at the disadvantages that the traditional clustering algorithms could not suit to dynamic network environments and it is hard for people to apply those algorithms in reality, a link-stable clustering algorithm for wireless sensor networks is proposed in this paper, and the implementation of a novel cross-layer design based on LSC with power control also be introduced. In the new power control scheme, the messages are transmitted with the optimum power, and a fair share of the medium to low power and high power nodes is provided by a reactive mechanism. The experimental results demonstrate that the novel cross-layer improving protocol which uses clustering and power control scheme provides longer lifetime and higher goodput than the current important protocols while keeping the network stably.