DTN中基于消息质量度和节点可信度的拥塞控制

doi:10.11896/jsjkx.200500011

Computer Science ›› 2021, Vol. 48 ›› Issue (4): 268-273.doi: 10.11896/jsjkx.200500011

• Computer Network • Previous Articles Next Articles

Congestion Control Based on Message Quality and Node Reliability in DTN

CUI Jian-qun, HUANG Dong-sheng, CHANG Ya-nan, WU Shu-qing

School of Computer,Central China Normal University,Wuhan 430079,China

Received:2020-06-24 Revised:2020-08-02 Online:2021-04-15 Published:2021-04-09
About author:CUI Jian-qun,born in 1974,Ph.D,professor,is a member of China Computer Federation .Her main research interests include opportunity network,Internet of things,mobile network and application layer multicast.(jqcui@126.com)
CHANG Ya-nan,born in 1984,Ph.D,associate professor,lecturer.Her main research interests include wireless network,social network and Internet of things.
Supported by:
National Natural Science Foundation of China(61672257) and National Natural Science Foundation Youth Project of China(61702210).

Abstract

Abstract: Delay Tolerant Network (DTN) has the characteristics of intermittent connection,limited resources and random dynamic change of topology structure.Therefore,limited network resources and uncertainty of network topology can easily lead to network congestion.In order to solve this problem,this paper puts forward a kind of congestion control strategy (CCMQ) based on message quality degree and node reliability.In this strategy,messages are prioritized according to the quality of the message.When forwarding the message,the message with a higher priority is forwarded firstly.When the next hop node is selected,the node with high reliability is selected for message forwarding,and the attributes of the relay node are fully considered.When congestion occurs,messages with low message quality are discarded firstly,and the S-ACK message confirmation and deletion mechanism are added to release the cache space of the node,so as to effectively alleviate the node congestion.Simulation results show that compared with the traditional congestion control algorithm,CCMQ has better performance in message delivery rate,network load rate and average delay.

Key words: Congestion control strategy, Deletion mechanism, DTN, Message quality, Node reliability

CLC Number:

TP393

CUI Jian-qun, HUANG Dong-sheng, CHANG Ya-nan, WU Shu-qing. Congestion Control Based on Message Quality and Node Reliability in DTN[J].Computer Science, 2021, 48(4): 268-273.

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