ALOHA脉冲超宽带网络的性能分析  

Performance Analysis of the ALOHA IR-UWB Network

作　　者：彭炳光[1] 卫国[1] 朱近康[1] 尹华锐[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,合肥230027

出　　处：《电子与信息学报》2008年第7期1602-1605,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金重大项目(60496314)资助课题

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。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.

关 键 词：脉冲超宽带 跳时 ALOHA 网络吞吐 帧传送延时 

分 类 号：TN915[电子电信—通信与信息系统]