计算机科学 ›› 2010, Vol. 37 ›› Issue (12): 30-34.

• 计算机网络与信息安全 • 上一篇    下一篇

DQ-MAC:一种基于区分服务的WSN信道访问机制

何剑,白光伟,曹磊   

  1. (南京工业大学计算机科学与技术系 南京210009);(南京大学软件新技术国家重点实验室 南京210093)
  • 出版日期:2018-12-01 发布日期:2018-12-01
  • 基金资助:
    本文受国家自然科学基金项目(60673185),教育部留学回国人员科研启动基金项目([2007]1108),江苏省青蓝工程中青年学术带头人培养对象资助项目([2007]2}资助。

DQ-MAC: A Diffserv-based MAC Mechanism in Wireless Sensor Networks

HE Jian,BAI Guang-wei,CAO Lei   

  • Online:2018-12-01 Published:2018-12-01

摘要: 针对现有无线传感器网络MAC协议不能提供数据业务优先级区分的问题,在充分分析导MAC协议的基础上,提出了一种基于区分服务的MAC协议改进机制—DC}MAC(Diffserv-based Qo}aware MAC)。其基本思路是让高优先级数据有更多的侦听时间,使高优先级数据传输的机会是低优先级的两倍,达到了减少高优先级数据的传输时延的目的,从而确保了高优先级数据业务的传输性能。相关分析结果表明,该机制使高优先级数据业务拥有更高的吞吐量,并且降低了高优先级业务的平均服务时延。

关键词: 无线传感器网络,区分服务,媒体接入控制

Abstract: Since the most of existing MAC protocols in wireless sensor networks do not support any priority scheme,this paper proposed an improved scheme of the existing S-MAC(sensor MAC) protocol, say, DC}MAC(Diffserv-based Qo}aware MAC). The main idea is that, based on Differentiated Services, an additional channel listening time was introduced for high priority data. As a result, compared to low priority data, data with high priority can achieve much more chance to be delivered, and the packet transmission latency of high priority data is reduced significantly as well. Our mathematical analysis demonstrates that, using the proposed D呀MAC, the transmission quality of high priority dato over wireless sensor networks is effectively improved, in terms of achieved throughput, average service delay, and so on.

Key words: Wireless sensor networks,Diffserv,MAC

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