QoS-oriented packet scheduling scheme for opportunistic networks  

作　　者：Yao Wenbin Chen Yin Zong Ming Wang Dongbin 

机构地区：[1]Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia,Beijing University of Posts and Telecommunications [2]School of Computer Science,Beijing University of Posts and Telecommunications [3]Yingcai Honors College,University of Electronic Science and Technology of China [4]National Engineering Laboratory for Mobile Network Security,Beijing University of Posts and Telecommunications

出　　处：《The Journal of China Universities of Posts and Telecommunications》2017年第3期51-57,共7页中国邮电高校学报（英文版）

基　　金：supported by the NSFC-Guangdong Joint Found (U1501254);the Co-Construction Program with the Beijing Municipal Commission of Education and the Ministry of Science and Technology of China (2012BAH45B01);the Fundamental Research Funds for the Central Universities (BUPT2011RCZJ16,2014ZD03-03);the China Information Security Special Fund (NDRC)

摘　　要：The unique characteristics of opportunistic networks （ONs）, such as intermittent connectivity and limited network resources, makes it difficult to support quality of service （QoS） provisioning, particularly to guarantee delivery ratio and delivery delay. In this paper, we propose a QoS-oriented packet scheduling scheme （QPSS） to make decisions for bundle transmissions to satisfy the needs for the delivery ratio and delivery delay constraints of bundles. Different from prior works, a novel bundle classification method based on the reliability and latency requirements is utilized to decide the traffic class of bundles. A scheduling algorithm of traffic class and bundle redundancy is used to maintain a forwarding and dropping priority queue and allocate network resources in QPSS. Simulation results indicate that our scheme not only achieves a higher overall delivery ratio but also obtains an approximate 14% increase in terms of the amount of eligible bundles.The unique characteristics of opportunistic networks （ONs）, such as intermittent connectivity and limited network resources, makes it difficult to support quality of service （QoS） provisioning, particularly to guarantee delivery ratio and delivery delay. In this paper, we propose a QoS-oriented packet scheduling scheme （QPSS） to make decisions for bundle transmissions to satisfy the needs for the delivery ratio and delivery delay constraints of bundles. Different from prior works, a novel bundle classification method based on the reliability and latency requirements is utilized to decide the traffic class of bundles. A scheduling algorithm of traffic class and bundle redundancy is used to maintain a forwarding and dropping priority queue and allocate network resources in QPSS. Simulation results indicate that our scheme not only achieves a higher overall delivery ratio but also obtains an approximate 14% increase in terms of the amount of eligible bundles.

关 键 词：opportunistic networks packet scheduling QOS traffic class of bundles 

分 类 号：TN929.5[电子电信—通信与信息系统]