無線傳感器網(wǎng)絡(luò)中定向擴散協(xié)議的改進算法
A Novel Directed Diffusion Mechanism for Wireless Sensor Networks
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摘要: 定向擴散算法周期性地擴散探測分組時，會給網(wǎng)絡(luò)帶來很大負載，嚴重影響了數(shù)據(jù)分組的傳輸性能。該文提出了一種基于梯度的受限擴散算法。通過分析鄰居梯度，計算擴散的廣度和深度，進而選取最優(yōu)的轉(zhuǎn)發(fā)節(jié)點集進行擴散。仿真結(jié)果表明受限擴散算法在保證較低能量消耗的前提下，大大縮短了擴散持續(xù)的時間和數(shù)據(jù)分組端到端時延。
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關(guān)鍵詞:
- 無線傳感器網(wǎng)絡(luò); 定向擴散; 分布式計算; 能量有效
Abstract: Directed diffusion is a classical data propagation protocol for wireless sensor networks. In directed diffusion routing, the diffusion of exploratory data can inevitably lead to heavy traffic periodically. Then the performance of data propagation may severely deteriorate at that moment. A gradient-based constrained diffusion algorithm is proposed in this paper. By analyzing the gradients of nodes neighbors, the breadth and depth for diffusion can be conducted firstly. Then diffusion is performed in the optimal set of selected forwarding nodes. The simulation results indicate that this algorithm can decrease both duration of diffusion and propagation delay greatly. In addition, it is energy-efficient, and compatible with existing algorithm without additional cost of control message. -
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