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基于智能天线并具有QoS保障的Ad hoc网络MAC协议


□ 张颖超 管丽丽 叶小岭

  摘 要:基于智能天线技术的发展,提出一种基于智能天线并具有QoS保障的MAC协议。该协议首先把信道划分为数据信道与控制信道,节点通过业务的优先级与时延来发送预报突发竞争信以保证QoS质量,随后按照RTS/CTS握手机制预约节点进行数据传输,又采用发送Busy Tones来防止聋节点和隐藏终端的问题,大大提高了网络容量与性能。通过分析与仿真,并且与IEEE 802.11协议以及DMAC协议比较,证明QTDMAC协议在吞吐量以及实时业务时延上都有很大的优越性。
  关键词:自组织;智能天线;MAC协议;服务质量
  中图分类号:TN915.04文献标志码:A
  文章编号:1001-3695(2009)06-2208-03
  doi:10.3969/j.issn.1001-3695.2009.06.063
  
  MAC protocol based on smart antenna for
  QoS-guarenteed services in Ad hoc networks
  ZHANG Ying-chao,GUAN Li-li,YE Xiao-ling
  (College of Information & Control, Nanjing Information Science & Technology University, Nanjing 210044, China)
  Abstract:Based on the development of smart antenna technology,this paper proposed the MAC protocol with QoS security. The protocol divided the channel into the data channel and the control channel, of which node sent forecast guarantee to compete the channel to protect the QoS through the priorities and time delay of the business. And then according to the RTS/CTS handshake appointment,reserved node for data transmission.Used node could send Busy Tones to prevent the problem of the deafness nodes and hidden terminal nodes, which greatly increased the network capacity and performance.Compared the protocol IEEE 802.1 with DMAC through analysis and simulation, the QTDMAC protocol is proved the superiority in throughput and the real-time delay business. ......
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