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中文摘要：
文中提出一种基于锚节点失效的、利用已定位节点帮助未知节点定位的算法。未知节点在锚节点失效的情况下不能获得足够信标信息,因此可能无法定位,于是向周围广播无法定位报文。收到该报文的已定位节点则选择地转化为参考节点,并广播自己的位置信息,转换为信标角色协助未知节点定位。无法定位节点从收到的信息中选择参考价值较高的坐标帮助自己定位。仿真结果表明,该方法能有效地提高定位覆盖率,降低锚节点失效对整个网络定位精度的影响。
英文摘要：
An anchored node failure based localization algorithm is proposed to help the nodes which can＇t locate themselves with the available beacon information. Unknow n nodes can＇t receive enough beacon information to locate themselves in the case of anchor node failure,so they broadcast the messages which notifies they can＇t locate themselves. When a located node receives these messages,it will broadcast its location information to help the senders which can＇t locate. Then the unknow n node picks up the node information with high degree of accuracy to locate itself. The simulation results show that this algorithm can effectively improve the localization coverage and relieve the influence of anchor node failure on the whole network localization accuracy.
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