根据信标节点到达未知节点的跳数信息,将未知节点接收到的信标节点划分为3个级别,即到达未知节点跳数为1的节点为第一级节点、跳数为n的节点为第二级节点,剩余的为第三级节点。为此,在未知节点的信息表中定义了两个计数器,即counter1和counter2。计数器的值不同,意味着所选择的定位方法也有所区别。此外,跳数为1的情况下,引入了接收信号强度指示（RSSI）模型进行定位。同时,文章也详细阐述了对传统的DV-Hop算法的改进。%In this paper, the anchor node were di- vided into three levels according to the hop count that they reach at the un-known node. So, two counters, counter 1 and counter 2, were defined in the table of the unknown node. The different values between the counters mean that the localization methods are different. Additionally, the RSSI model is introduced to localization when the hop count is one. Meanwhile, the improvement of the traditional DV-Hop algorithm is also presented in detail.
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