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- Title
无线传感器网络中 DV-Hop 定位方法的一种改进策略.
- Authors
石琴琴; 周俊杰; 张建平
- Abstract
The node localization process of the traditional Distance Vector-Hop (DV-Hop) method can be summarized as two steps, the distance estimation and the position calculation. The node-beacon distance estimation accuracy is sensitive to the heterogeneity of network topology, and the location derivation algorithm is sensitive to the node-beacon distance estimation accuracy. In this way, the robustness of the method is poor while the network topology is diversiform. To solve such a problem, an improvement strategy is put forward and the main work includes: in the distance estimation step, the average hop distance between the nearest beacon within one jump of an unknown node and every other beacon is used as the average hop distance between the unknown node and the beacon to calculate the node-beacon distance, in order to improve the node-beacon distance estimation accuracy; in the position calculation step, a refining process using Newton iterative algorithm is added after the initial position of an unknown node is derived using Lateration algorithm, in order to improve the node localization accuracy. Simulation shows that under the same network conditions, compared with the original method and another representative improved algorithm, the proposed strategy can obtain higher distance estimation accuracy in the first step, and then, it can improve the robustness to distance estimation error in the second step. Thereby, the strategy can improve the average localization accuracy of the unknown nodes in the network.
- Publication
Telecommunication Engineering, 2015, Vol 55, Issue 11, p1219
- ISSN
1001-893X
- Publication type
Article
- DOI
10.3969/j.issn.1001-893x.2015.11.006