Grid-based directed diffusion for wireless sensor networks  

作　　者：毕嘉娜 Ji Zhenzhou Cao Zhiyan 

机构地区：[1]Department of Computer Science and Technology, Harbin Institute of Technology, Harbin 150001, P.R. China

出　　处：《High Technology Letters》2008年第4期342-347,共6页高技术通讯（英文版）

基　　金：the National High Technology Research and Development Programme of China(No.2002AA142020);the National Natural Science Foundation of China(No.60475012)

摘　　要：Directed diffusion is a data dissemination protocol for wireless sensor networks. In directed diffusion, flooding is used for dissemination of interest and exploratory data, which will bring broadcast storm resulting in substantial energy consumption of networks. A grid-based directed diffusion is presented to improve the energy efficiency of directed diffusion. Virtual geographic grid clusters are constructed by self-organization of nodes using geographic location information. The flooding of interest and exploratory data of original directed diffusion is limited in cluster head nodes. The simulation results and testbed experiments show that the method effectively reduces the network energy consumption. This gain is not achieved at the cost of either delivery ratio or the delay. Importantly, the decreased load also leads to a better delivery ratio and lower delay.Directed diffusion is a data dissemination protocol for wireless sensor networks.In directed diffu-sion,flooding is used for dissemination of interest and exploratory data,which will bring broadcast stormresulting in substantial energy consumption of networks.A grid-based directed diffusion is presented toimprove the energy efficiency of directed diffusion.Virtual geographic grid clusters are constructed byself-organization of nodes using geographic location information.The flooding of interest and exploratorydata of original directed diffusion is limited in cluster head nodes.The simulation results and testhed ex-periments show that the method effectively reduces the network energy consumption.This gain is notachieved at the cost of either delivery ratio or the delay.Importantly,the decreased load also leads to abetter delivery ratio and lower delay.

关 键 词：wireless sensor networks directed diffusion BROADCAST GRID CLUSTER 

分 类 号：TN929.5[电子电信—通信与信息系统] TP212.9[电子电信—信息与通信工程]