无线衰落信道中RLP性能分析

北京邮电大学学报 ›› 2002, Vol. 25 ›› Issue (3): 50-54.

无线衰落信道中RLP性能分析

纪红, 罗涛, 邓建民, 乐光新

北京邮电大学电信工程学院, 北京 100876

收稿日期:2001-08-23 出版日期:2002-09-10
作者简介: 纪红(1966—),女,副教授,在职博士生。
基金资助:
国家自然科学基金资助项目(60172052);国家自然科学基金重大研究计划资助项目(90104018)

Analysis of RLP Performance over Wireless Fading Channel

JI Hong, LUO Tao, DENG Jian-min, YUE Guang-xin

Telecommunication Engineering School, Beijing University of Posts andTelecommunications, Beijing 100876, China

Received:2001-08-23 Online:2002-09-10
Supported by:

摘要/Abstract

摘要： 在考虑无线衰落信道中突发差错引起的分组丢失的情况下,采用一阶两状态Markov模型,推导出了无线链路层(RLP)当ARQ最大允许重传次数N_r有限时的吞吐量效率公式。结果表明,对于Go-Back-N协议,当帧差错率较小时,重传次数N_r对吞吐量效率的影响非常小;当帧差错率变大时,存在“地板效应”。进一步研究表明,无线链路中当最大允许重传次数增大时,在RLP的吞吐量效率减小的同时,由RLP提交给TCP的剩余帧差错率也减小了。

关键词: 无线链路层, 无线衰落信道, Markov模型, 吞吐量效率

Abstract: Considering the packets loss caused by burst errors over wireless fading channel, RLP performance is analyzed using the first-order two-state Markov model. The formula to calculate the RLP throughput efficiency is also deduced while the maximal numbers of allowed retransmission is limited. Results show that when FER is small, the RLP throughput efficiency hardly decrease as the retransmission numbers increasing, and when FER is large, there exists a “floor effect” in RLP throughput efficiency for Go-Back-N. Further study shows that the RLP throughput efficiency decreases when the numbers of allowed retransmission increase, meanwhile the residual FER, which is reported to TCPby RLP, is reduced.

Key words: radio link protocol, wireless fading channel, Markovmodel, throughput efficiency

中图分类号:

TN929

纪红, 罗涛, 邓建民, 乐光新. 无线衰落信道中RLP性能分析[J]. 北京邮电大学学报, 2002, 25(3): 50-54.

JI Hong, LUO Tao, DENG Jian-min, YUE Guang-xin. Analysis of RLP Performance over Wireless Fading Channel[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2002, 25(3): 50-54.

[1]	张兵,高泽华,文柳,高峰,徐大雄. IEEE 802.11中上下行带宽公平分配机制[J]. 北京邮电大学学报, 2011, 34(2): 126-130.
[2]	刘真，杨大成. 瑞利衰落信道有限状态Markov模型的研究[J]. 北京邮电大学学报, 2005, 28(5): 85-88.
[3]	邓建民,　纪　红,　罗　涛,　乐光新. 受物理层参数影响的RLP协议性能研究[J]. 北京邮电大学学报, 2003, 26(2): 37-41.