Research on Directed Diffusion Routing Protocols in Wireless Sensor Networks
Shan Zhi-long · Computer Technology and Development · 2010
Directed diffusion(DD) is a typical data-centric protocol for wireless sensor networks.It has many advantages,but it also has some defeats.In the initial interest diffusion stage,DD uses the flooding method,which leads to more energy expenses.In order to reduce energy consumption,directed diffusion based on radio frequency of angle(DD-RAF) is proposed in this paper.In DD-RAF,the neighbor nodes diffuse interest using radio frequency of angle.Only in the radio frequency scope can the interests be diffused by the neighbor nodes.Comparing with DD,simulation results show that the improved protocol efficiently reduces flooding scope,decreases the number of participating nodes in the flooding, and save the energy.Consequently,the improved routing can efficiently save the energy,prolong the lifetime of wireless sensor networks.