无线传感器网络中PECR协议的改进  

Improvement of PECR protocol in wireless sensor networks

作　　者：张涌逸[1] 

机构地区：[1]太原师范学院计算机系,山西晋中030619

出　　处：《无线互联科技》2017年第17期15-16,共2页Wireless Internet Technology

摘　　要：PECR协议中对下游节点是否拥塞仅仅是一种预测,这种预测有时是不准确的,且在下游节点没有满足条件拥塞度和剩余能量的时候,传输层的问题要回到网络层去处理。为了解决PECR协议中存在的这些问题,文章引入了具有发送优先级的两个队列,优先发送优先级高的数据,在实际出现拥塞时会通知上游节点减少发送速率,并先抛弃掉优先级低的数据。在拥塞严重的时候也会抛弃掉优先级高的数据,但不会再回到网络层去处理问题。Whether the downstream node is congestion in PECR protocol is only a prediction, which is sometimes inaccurate, and when the downstream node does not satisfy the conditional congestion degree and time remaining energy, the problem of transport layer has to be sent back to the network layer to solve. In order to solve these problems in the introduction, the article introduces two queues with send priority to send data with high priority, when the actual congestion occurs, the upstream node is notified and the transmission rate is reduced and discard the low priority data first. When the congestion is serious, the data with high priority will be discarded, but it will not go back to the network layer to deal with the problem.

关 键 词：拥塞控制 可靠性 拥塞度 队列 

分 类 号：TN929.5[电子电信—通信与信息系统] TP212.9[电子电信—信息与通信工程]