摘要
为实现无线传感器网络中的拥塞控制以提高网络覆盖,提出一种最大冗余丢弃的缓冲区管理和覆盖传输的数据包调度机制。在前者中,如果节点之间彼此靠得很近,则在拥塞期间丢弃靠得很近的一组节点的数据包,获得期望效用更高的数据包,使更少的信息丢失;在后者中,当两个数据包非常靠近时,则在考虑全部数据包的同时,寻找高效用或低冗余数据包,尝试选择最大化覆盖的数据包传输,实现高网络覆盖。仿真结果表明,相比单纯的丢尾和先进先出算法,采用最大冗余丢弃和覆盖传输的拥塞控制机制可明显提高网络的覆盖增益。
To achieve congestion control in wireless sensor network to improve network coverage,a mechanism for buffer manage-ment with maximum redundancy discarding and packet scheduling with coverage transmission was proposed.In the former case,if the nodes were close to each other,the data packets among a set of the nearest node were discarded during the congestion to obtain higher expected utility packets and result in less information loss.In the latter case,when two packets were very close to each other,high utility or low redundancy packets were sought while all packets were considered,and the packet transmission that maximized coverage was attempted to achieve high network coverage.The simulation results show that the use of the congestion control mechanism of maximum redundancy discarding and coverage transmission can obviously improve the coverage gain of the network compared with the pure drop-tail and first-in first-out algorithms.
作者
周小玲
付银莲
ZHOU Xiao-ling;FU Yin-lian(Department of Fundamental Education,Guangzhou Railway Polytechnic,Guangzhou 510430,China;College of Mathematics and Information,South China Agricultural University,Guangzhou 510642,China)
出处
《计算机工程与设计》
北大核心
2021年第7期1844-1850,共7页
Computer Engineering and Design
基金
广东高校省级重点平台和重大科研基金项目(2018GKTSCX112)。
关键词
无线传感器网络
拥塞控制
排队
效用
冗余
覆盖率
wireless sensor network
congestion control
queuing
utility
redundancy
coverage
