In addition, broadcast period and used frequency of nodes are added to the data in backtrack ants, in order to set different update period of different nodes instead of uniform broadcast update period. 另外,存返回蚂蚁携带的数据中增加了广播周期和节点使用频率的信息,用于对不同节点设置不同的更新周期,而不再使用统一的广播更新周期。