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·318- 智能系统学报 第8卷 出现时这个系统会通知每一个邻近车辆本文的研究 802.11 Ad Hoc networks in the presence of exposed terminals 目的是将基本的ODAM算法改进为可以支持未配备 [J].Ad Hoc Network8(S1570-8705),2008.6(3):474 GPS车辆间可相互支持的系统.结果表明当装备GPS 482. 车辆率平均达到60%时ODAM会表现出最佳状态.同 [7]VENKATRAMAN S,CAFFERY J,YOU H R.Location u- 时当装备GPS车辆率达到40%时,通过增大传输距 sing LOS range estimation in NLOS environments[C//IEEE VTC.Birmingham.[S.I.],2002:856-860. 离可以优化算法.当装备GPS车辆率低于20%时,即 [8]VENKATRAMAN S,CAFFERY J.Multipath-aided location 使增大发射功率,也无法获得未装备GPS车辆的准 estimation using angles-of arrival[C]//Proceedings of the 确位置这时将这些车辆看做消极的元素(它们不再 Int Conference on Location Services and Navigation Technolo- 传播扩散警报信息),同时向其发送如行驶方向和事 gies.Orlando USA,2003:67-75. 故发生地距离等信息,这些信息能够帮助驾驶员作出 [9]CAPKUN S,HAMDI M,HUBAUX J P.GPS-free ositioning 适当的判断 in mobile ad hoc networks[J].Cluster Computing,2002,5 (2):157-167. 参考文献: [10]JAEGER A,BIBMEYER N,STUBING H.A novel frame- [1]BRIESEMEISTER L,HOMMEL G.Overcoming fragmenta- work for efficient mobility data verification in vehicular ad- tion in mobile ad hoc networks[J].Journal of Communica- hoc networks[].International Journal of Intelligent Trans- tions and Networks,2000,2(3):182-187. portation Systems Research,2012,10(1):11-21 [2]SUN Minte,FENG Wuchi,HWANG Laiten,et al.GPS- 作者简介: based message broadcast for adaptive inter-vehicle communi- 孙剑明,男,1980年生,讲师,主要研 cations[C]//Proceedings of IEEE VTC Fall 2000.2000,6: 究方向为导航、制导与控制,发表学术论 2685-2692. 文10余篇, [3]ZEADALLY S,HUNT R,CHEN Y S.Vehicular ad hoc net- works VANETS):status,results,and challenges[J.Tele- communication Systems,2012,50(4):217-241. [4]BENSLIMANE A.Optimized dissemination of alarm messages in vehicular ad-hoc networks (VANET)[C]//Proceedings 赵琳,男,1968年生,教授.博士生导 of 7th IEEE Int Conf HSNMC.[S.L.]2004:655-666. 师,博士.主要研究方向为惯性导航技 [5]CAFFERY J J,STUBER G L.Overview of Radiolocation in 术、卫星导航技术、组合导航技术、信息 CDMA cellular systems[J].IEEE Communications Magazine, 处理与计算机仿真等,发表学术论文150 1998,36(4):38-45. 余篇。 [6]VASSIS D,KORMENTAS G.Performance analysis of IEEE出现时这个系统会通知每一个邻近车辆.本文的研究 目的是将基本的 ODAM 算法改进为可以支持未配备 GPS 车辆间可相互支持的系统.结果表明当装备 GPS 车辆率平均达到 60%时 ODAM 会表现出最佳状态.同 时当装备 GPS 车辆率达到 40%时,通过增大传输距 离可以优化算法.当装备 GPS 车辆率低于 20%时,即 使增大发射功率,也无法获得未装备 GPS 车辆的准 确位置.这时将这些车辆看做消极的元素(它们不再 传播扩散警报信息),同时向其发送如行驶方向和事 故发生地距离等信息,这些信息能够帮助驾驶员作出 适当的判断. 参考文献: [1] BRIESEMEISTER L, HOMMEL G. Overcoming fragmenta⁃ tion in mobile ad hoc networks[ J]. Journal of Communica⁃ tions and Networks, 2000, 2(3): 182⁃187. [2] SUN Minte, FENG Wuchi, HWANG Laiten, et al. GPS⁃ based message broadcast for adaptive inter⁃vehicle communi⁃ cations[C] / / Proceedings of IEEE VTC Fall 2000. 2000, 6: 2685⁃2692. [3]ZEADALLY S, HUNT R, CHEN Y S. Vehicular ad hoc net⁃ works (VANETS): status, results, and challenges[J]. Tele⁃ communication Systems, 2012, 50(4): 217⁃241. [4]BENSLIMANE A. Optimized dissemination of alarm messages in vehicular ad⁃hoc networks (VANET) [C] / / Proceedings of 7th IEEE Int Conf HSNMC. [S.l.], 2004: 655⁃666. [5]CAFFERY J J, STÜBER G L. Overview of Radiolocation in CDMA cellular systems[J]. IEEE Communications Magazine, 1998, 36(4): 38⁃45. [6]VASSIS D, KORMENTAS G. Performance analysis of IEEE 802.11 Ad Hoc networks in the presence of exposed terminals [J]. Ad Hoc Networks ( S1570⁃8705), 2008, 6(3): 474⁃ 482. [7]VENKATRAMAN S, CAFFERY J, YOU H R. Location u⁃ sing LOS range estimation in NLOS environments[C] / / IEEE VTC. Birmingham. [S.l.],2002: 856⁃860. [8]VENKATRAMAN S, CAFFERY J. Multipath⁃aided location estimation using angles⁃of arrival [C] / / Proceedings of the Int Conference on Location Services and Navigation Technolo⁃ gies. Orlando USA, 2003: 67⁃75. [9]ĈAPKUN S, HAMDI M, HUBAUX J P. GPS⁃free ositioning in mobile ad hoc networks[J]. Cluster Computing, 2002, 5 (2) : 157⁃167. [10]JAEGER A, BIβMEYER N, STÜBING H. A novel frame⁃ work for efficient mobility data verification in vehicular ad⁃ hoc networks[J]. International Journal of Intelligent Trans⁃ portation Systems Research, 2012, 10(1): 11⁃21. 作者简介: 孙剑明,男,1980 年生,讲师,主要研 究方向为导航、制导与控制,发表学术论 文 10 余篇. 赵琳,男,1968 年生,教授,博士生导 师,博士.主要研究方向为惯性导航技 术、卫星导航技术、组合导航技术、信息 处理与计算机仿真等,发表学术论文 150 余篇. ·318· 智 能 系 统 学 报 第 8 卷
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