WSN中一种改进的DCCP拥塞控制机制  

AN IMPROVED DCCP CONGESTION CONTROL MECHANISM IN WSN

作　　者：卢先领[1] 施利利[2] 

机构地区：[1]江南大学轻工过程先进控制国家教育部重点实验室,江苏无锡214122 [2]江南大学物联网工程学院,江苏无锡214122

出　　处：《计算机应用与软件》2015年第6期136-139,共4页Computer Applications and Software

基　　金：国家自然科学基金项目(61174021);中央高校基本科研业务费专项资金项目(JUSRP21129);江苏高校优势学科建设工程项目

摘　　要：由于WSN具有链路质量差、数据冗余度高和"多对一"汇聚等特性,使得传统TCP协议的应用受到了挑战。为此,基于数据报传输协议(DCCP)提出一种改进的拥塞控制机制IM_DCCP。IM_DCCP根据误码丢包率来区分链路误码和网络拥塞引发的丢包,同时引入信道繁忙比率来协作进行网络拥塞检测,并针对不同的拥塞等级选择正确的窗口调节策略实施拥塞控制。NS2仿真表明,所提出的机制与其他机制比较,公平性较好,且能有效的降低丢包率、提高网络吞吐量性能。The application of traditional TCP is a challenging work due to WSN has the characteristics of poor quality of link,high redun-dancy of data and “many-to-one”gathering.This paper presents an improved congestion control mechanism based on the datagram congestion control protocol （DCCP）,namely the IM_DCCP.The new mechanism differentiates the packet loss triggered by either link bit errors or net-work congestion according to errors packet loss rate.At the same time,it introduces the channel busyness ratio to collaborative detection of network congestion,and selects proper window adjustment strategy to implement congestion control in light of different congestion status.It is demonstrated by NS2 simulation that comparing with other mechanisms,the proposed mechanism has good fairness and can effectively reduce packet loss rate as well as improve network throughput performance.

关 键 词：无线传感器网络 拥塞控制 信道繁忙比率 误码率 

分 类 号：TP393.01[自动化与计算机技术—计算机应用技术]