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非饱和状态下时隙CSMA/CA机制改进与性能分析 被引量：5

Improved analytical model for slotted CSMA/CA mechanism in non-saturation environments
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摘要 针对无线传感器网络中有重要信息的高优先级数据包需要尽快传输,且IEEE802.15.4协议本身不支持任何优先级机制的情况,结合优先级调度策略和差分服务机制,对具有优先级级的时隙CSMA/CA机制进行全面数学建模,包括节点马尔科夫模型和信道马尔科夫模型,据此提出了一种非饱和状态下具有优先级的IEEE802.15.4时隙CSMA/CA机制性能的分析方法。通过比较分析,改进的机制对提高网络中高优先级数据包的传输性能具有积极作用。 Considering that high-priority packets in the network of emergency or critical events should transmit as soon as possible, IEEE 802.15.4 standard protocol itself does not support any priority mechanism. Priority scheduling strategy and service differentiation mechanism are adopted. A comprehensive mathematical modeling for the slotted CSMA/CA algorithm is established for the first time, including the node Markov model and channel Markov model. An improved analytical method for IEEE 802.15.4 slotted CSMA/CA in non-saturation environments, is proposed. The analytical results show that the high priority packet real-time transmission performance is effectively improved.
作者 陈金 樊晓平 刘少强 陈志杰
机构地区 中南大学信息科学与工程学院 湖南财政经济学院网络化系统研究所
出处 《计算机工程与应用》 CSCD 2012年第30期140-146,共7页 Computer Engineering and Applications
基金 国家自然科学基金(No.60776834 No.60870010)
关键词 时隙CSMA/CA 节点马尔科夫模型 信道马尔科夫模型 优先级 slotted CSMA/CA node Markov model channel Markov model priority
分类号 TN915.01 [电子电信—通信与信息系统]
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参考文献8

  • 1IEEE-TG15.4.Part 15.4: wireless Medium Access Control (MAC) and Physical Layer (PHY) specifications for Low Rate Wn'eless Personal Area Networks(LR-WPANs)[S].2006.
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同被引文献37

  • 1赵志宏,李小珉,郭志.Zigbee无线传感器网络的研究与实验[J].电子器件,2007,30(4):1503-1509. 被引量：8
  • 2孙利明，李建中，陈渝等．无线传感器网络[M]．北京：清华大学出版社，2005．
  • 3Chiaraburatti.Seneor Networks with IEEE 802.15.4 Systems:Distributed Processing Mac,and Connectivity[M].北京:科学出版社,2012:3.
  • 4Standand for part 15.4:wireless medium access contorl (MAC) and physical layer (PHY) specifications for lowrate wireless personal area networks (WPAN),IEEE Std 802.15.4[M].New York:Wiley,2003:64.
  • 5MiLic,Sha fi S,MiLic V B.The lmpact of MAC Parameters on the Performance of 802.15.4 PAN [J].Elsevier Ad hoc Networks Journal,2005,3(5):509-528.
  • 6Kim T,Choi S.Priority-based depay mitigation for event momitoring IEEE 802.15.4 LR-WPANs[J].IEEE Communications Letters,2006,0(3):213-215.
  • 7Deng J,Chang R S.A priority scheme for IEEE 802.11 DCF access method[C]∥Transactions in Communications.New York:1999:96-102.
  • 8Wen Hao,Lin Chuang,Chen Zhi-jia,et al.An Improved Markov Model for IEEE 802.15.4 Slotted CSMA/CA Mechanism[J].Journal of Computer Science and Technology,2009,24(3):495-504.
  • 9Bianchi G.Performance Analysis of the IEEE 802.11 Distributed Coordination Function[J].IEEE journal of Selected Areas in Telecommunication,2000,18(3):535-547.
  • 10Pang Ai-chun,Tseng H-W.Dynamic Backoff for Wireless Personal Networks [C]∥IEEE Communications Society Globecom.Taiwan:Institute of Electrical and Electronics Engineers,2004:1580-1584.

引证文献5

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计算机工程与应用
2012年 第30期

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