ALOHA脉冲超宽带网络的性能分析
doi: 10.3724/SP.J.1146.2006.01973
Performance Analysis of the ALOHA IR-UWB Network
-
摘要: 脉冲超宽带(IR-UWB)系统的脉冲宽度极窄，脉冲占空比极低，使用跳时和时间分集传送。该文分析了分布式脉冲超宽带网络中采用ALOHA 方式共享信道时帧传送失败的原因，推导出帧传送失败的概率，通过分析数据帧产生-缓冲-传送的M/G/1 排队过程，得到了网络吞吐、帧传送延时的公式。仿真结果说明，ALOHA脉冲超宽带网络的吞吐，帧传送延时和网络稳定性能远远优于ALOHA 载波调制技术网络。Abstract: An Impulse Radio UWB (IR-UWB) system uses very narrow pulses with time-hopping and time diversity to transmit data, where the signals have very low duty cycle. In this paper the cause of data frame transmission failure is analyzed in a distributed IR-UWB network using the ALOHA protocol, and the failure probability is derived. Based on queuing analysis of the data frame generating-buffering-sending process, the network throughput and frame transmission delay in closed-form expressions are obtained. Simulation results show that the throughput, frame transmission delay and stability of the ALOHA IR-UWB network is much better than those of the ALOHA network based on carrier modulation technology.
-
Abramson N. The ALOHA systemAnother alternativefor computer communications. Proceedings of AFIPS 1970Fall Joint Computer Conference, Houston, USA, 17-19 Nov.1970, 37: 281-285.[2]Abramson N. Development of the ALOHANET[J].IEEE Trans.on Information Theory.1985, 31(2):119-123[3]Giancola G, Blazevic L, and Bucaille I, et al.. UWB MAC andnetwork solutions for low data rate with location and trackingapplications. Proceedings of 2005 IEEE InternationalConference on Ultra-Wideband, Zurich, Switzerland, 5-8 Sept.2005: 758-763.[4]Nardis L De and Benedetto M G Di. Medium access controldesign for UWB communication systems: review and trends.Journal of Communications and Networks, 2003, 5(4):386-393.[5]Di Benedetto M G, De Nardis L, and Junk M, et al..(UWB)2:Uncoordinated, Wireless, Baseborn, medium access controlfor UWB communication networks. Mobile Networks andApplications, Mobile Networks and Applications Special Issueon WLAN Optimization at the MAC and Network Levels,2005, 10(5): 663-674.[6]唐应辉, 唐小我. 排队论：基础与分析技术. 北京: 科学出版社, 2006: 84-87. -
计量
- 文章访问数: 3038
- HTML全文浏览量: 55
- PDF下载量: 1013
- 被引次数: 0
下载:
