作者：周滨, 郭伟, 任智
作者单位：电子科技大学通信与信息工程学院, 四川 成都 610054
关键词：多跳无线网; TDMA/FDMA; QoS; MAC; 竞争预约
摘要：
提供一定的服务质量保证(QoS)是多跳无线网络研究中的热点和难点,本文基于TDMA/FDMA机制提出了一种支持多信道多跳无线网络话音级QoS业务的MAC层接入协议RA/SRN。该协议以RBRP协议思想为基础,针对无线信道中隐藏、暴露终端造成的信道利用率降低和分组冲突问题进行改进设计,减小了信道冲突概率,提高了信道利用率,降低了信道接入时延,为网络层QoS路由协议提供了良好的支持。
A MAC protocol for QoS-guarenteed services in multi-hop mobile wireless network
ZHOU Bin, GUO Wei, REN Zhi
School of Communication and Information Engineering, University of Electronic Science and Technology, Chengdu 610054, China
Abstract: How to provide definite QoS services is the hot and difficult point in multi-hop mobile wireless network research domain.Based on TDMA/FDMA mechanism,we propose a MAC protocol RA/SRN,which supports voice-class QoS service in multi-hop mobile wireless network.This protocol,which takes example by the principle of RBRP,is designed aiming at decrease of channel utilization and the packets' collision caused by hidden terminal and exposed terminal problems of wireless channel.It decreases the collision probability and access delay,and increases the utilization of the channel.Thus,it offers a good support for the QoS routing protocol of upper layer.
Keywords: Multi-hop mobile wireless network; TDMA/FDMA; QoS; MAC; Contension reservation
2006, 32(2): 100-103 收稿日期: 2005-5-11;收到修改稿日期: 2005-7-28
基金项目: 国家自然科学基金(60472052)、教育部新世纪优秀人才支持计划项目(2004年度)战术通信抗干扰技术、国防科技重点实验室(514340Z0105ZS04)
作者简介: 周滨(1981-),女,硕士研究生,主要从事无线自组织网络资源管理。
参考文献
[1] C.L.Fullmer and J.J.Garcia-Luna-Aceves,Solutions to Hidden Terminal Problems in Wireless Networks,in Proc.ACM SIGCOMM,1997.
[2] Asis Nasipuri,Jun Zhuang,and Samir R.Das,A Multichannel CSMA MAC Protocol for MultihopWireless Networks[J].IEEE 21-24,1999,3(9):1402-1406.
[3] IEEE Standards Department,Wireless LAN medium access control(MAC) and physical layer(PHY) specifications,IEEE standard 802.11-1997,1997.
[4] P.Kam,MACA-a new Channel Access Method for Packet Radio[C],in Proc.ARRL CRRL Amateur Radio 9th Comput.Networking Conf,1990.
[5] Zhenyu Tang and J.J.Garcia-Luna-Aceves,Collision-avoidance Transmission Scheduling for ad-hoc Networks[C].2000 IEEE International Conference,2000,3:1788-1794.
[6] M.K.Marina,G.D.Kondylis and U.C.Kozat,RBRP:A robust Broadcast Reservation Protocol for Mobile ad hoc Networks[C].IEEE International Conference,2001,3(6):878-885.
[7] Chang Wook Ahn;Chung Gu Kang;You Ze Cho,Soft Reservation Multiple Access with Priority Assignment(SRMA/PA):a novel MAC Protocol for QoS-guaranteed Integrated Services in Mobile ad-hoc Networks[C].IEEE VTS-Fall VTC 2000,52nd Vol.2,24-28,942-947.
[8] 朱莉,郭伟.自组网中一种动态资源分配方案[J].通信与信息技术(增刊),2004:6-10.
