计算机科学 ›› 2016, Vol. 43 ›› Issue (3): 84-88.doi: 10.11896/j.issn.1002-137X.2016.03.017
齐法制,张红梅,张瀚文,孙智慧,曾珊,夏明山
QI Fa-zhi, ZHANG Hong-mei, ZHANG Han-wen, SUN Zhi-hui, ZENG Shan and XIA Ming-shan
摘要： 提出了一种适用于MANET网络的基于队列长度的逐跳AC自适应机制(QLACSA)。QLACSA机制的设计目标是解决EDCA在MANET网络中不同长度的业务流间的不公平竞争问题,为时延敏感的业务流提供可靠的端到端时延保证。QLACSA机制作用于MAC层,对时延敏感的业务流,将其全局时延需求合理地划分成逐跳的期望时延,根据数据包的实际时延状况,执行逐跳的AC重估,并在AC的选择过程中综合考虑数据包的延迟状态、本地时延需求和队列的排队情况,以保证各数据包能在QoS要求的端到端时延要求内到达目的节点。QLACSA还采用了整流策略,通过主动丢包实现“优胜劣汰”,将已经过期或有可能过期的数据包丢弃,从而降低可能的信道资源浪费,为具有更高传输成功率的数据包提供更多的传输机会。仿真结果表明,QLACSA机制在满足端到端时延需求的同时,将路径较长的业务流吞吐量提高了211%~245%左右。
| [1] Yi Sun,Yang Guo,et al.The Case for P2P Mobile Video System over Wireless Broadband Networks:A Practical Study of Challenges for a Mobile Video Provider [J].IEEE Network,2013,27(2):22-27 [2] IEEE Computer Society.IEEE Standard for Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Specific requirements-Part 11:Wireless LAN Medium Access Control(MAC) and Physical Layer(PHY) specifications A-Amendments 8:Medium Access Control(MAC) Quality of Service Enhancements [S].New York:IEEE,2005 [3] Chunyu H,Jennifer H.A Novel Approach to Contention Control in IEEE 802.11e-Operated WLANs [C]∥The 26th IEEE Int Conf on Computer Communications (INFOCOM).2007:1190-1198 [4] Ge Ye,Hou J,Choi S.An analytic study of tuning systems parameters in ieee 802.11e enhanced distributed channel access [J].Computer Networks,2007,51(8):1955-1980 [5] Min Ge-yong,Hu Jia,Jia Wei-jia,et al.Performance Analysis of the TXOP Scheme in IEEE 802.11e WLANs with Bursty Error Channels [C]∥IEEE Wireless Communications and Networking Conf (WCNC).2009:1-6 [6] Nuno F,Sugiyama T,Morikura M.QoS control scheme that uses back pressure traffic control for Wireless LANs [C]∥IEEE International Symposium on Personal,Indoor and Mobile Radio Communications (PIMRC).2012:1442-1447 [7] Yao Xin-wei,Wang Wan-liang,et al.A Novel Hybrid Slot Allocation Mechanism for 802.11e EDCA Protocol [J].Information Processing Letters,2014,114(1/2):25-30 [8] Kim S,Lee H-Y.Cooperative Communication Protocol Based on EDCA in IEEE 802.11e WLANs [M]∥Computer Science and its Applications.2015:771-776 [9] Yong L J,Jun L S,Keun J J,et al.A QoS Tracking Algorithm for Multimedia Requirements over IEEE 802.lle Multihop Networks [C]∥IEEE International Symposium on Personal,Indoor and Mobile Radio Communications (PIMRC).2010:2455-2459 [10] Igartua M A,Frias V C,Llopis Luis J C,et al.Dynamic framework with adaptive contention window and multipath routing for video-streaming services over mobile ad hoc networks [J].Telecommunication Systems,2010,49(4):379-390 [11] Chakraborty S,Swain P,Nandi S.Proportional fairness in MAC layer channel access of IEEE 802.11s EDCA based wireless mesh networks [J].Ad Hoc Networks,2013,11(1):570-584 [12] Li Jian,Li Zhi,Prasant M.Adaptive Per Hop Differentiation for End-to-End Delay Assurance in Multihop Wireless Networks [J].Ad Hoc Networks,2009,7(6):1169-1182 [13] Min-Soo K,Shrestha D M,Young-Bae K.EDCA-TM:IEEE802.11e MAC Enhancement for Wireless Multi-hop Networks [C]∥IEEE Wireless Communications and Networking Conf (WCNC).2009:1-6 [14] Lee S-H,Yoo C.Hop-Based Priority Technique Using 802.11e for Multimedia Streaming [J].IEEE Transactions on Consumer Electronics,2010,56(1):48-53 |
| No related articles found! |
|
||
首页