| 卫星ATM网络中自适应FEC情况下的有效带宽估计 |
| |
| 引用本文： | 吕蓉,曹志刚.卫星ATM网络中自适应FEC情况下的有效带宽估计[J].宇航学报,2006,27(3):507-512. |
| |
| 作者姓名： | 吕蓉 曹志刚 |
| |
| 作者单位： | 清华大学,电子工程系,北京,100084 |
| |
| 摘 要： | 针对采用自适应前向差错控制（AFEC）的卫星异步传递模式（ATM）网络，研究了两种有效带宽估计方法。由于AFEC码率的动态特性使业务实际的传输速率具有不固定性，因此估计有效带宽时要考虑AFEC的影响。首先针对一般卫星时变信道和多码率AFEC情况下的卫星ATM，应用流体近似方法分析了有效带宽的计算，然而该方法要求的条件及计算复杂度均比较高，应用中有局限性。以此方法为基础，提出了采用修正因子的估计方法。数值结果表明采用修正因子的有效带宽估计方法比较简单可靠，适用面较广。
|
| 关 键 词： | 卫星通信 异步传递模式 自适应前向差错控制 有效带宽 |
| 文章编号： | 1000-1328（2006）03-0507-06 |
| 收稿时间： | 10 12 2004 12:00AM |
| 修稿时间： | 2004-10-122005-11-20 |
Effective Bandwidth Estimation for Satellite ATM Networks with Adaptive FEC |
| |
| LU Rong,CAO Zhi-gang.Effective Bandwidth Estimation for Satellite ATM Networks with Adaptive FEC[J].Journal of Astronautics,2006,27(3):507-512. |
| |
| Authors: | LU Rong CAO Zhi-gang |
| |
| Institution: | Department of Electronics Engineering, Tsinghua University, Beijing 100084 China |
| |
| Abstract: | This paper presents two effective bandwidth estimation methods for asynchronous transfer mode(ATM) technology over satellite networks with adaptive forward error control(AFEC).Due to the dynamic code rate of AFEC,its effect would be taken into account in estimating the effective bandwidth.A fluid approximation method is first applied to estimate the effective bandwidth values for general time-varying satellite channels and satellite ATM network with multiple-code-rate AFEC.But the requirements of the method are strict and its computing complexity is high for practical purposes.Based on this method,the authors propose a second estimation method by using a modification factor.The numerical results show the second method is simple,effective and widely applicable. |
| |
| Keywords: | Satellite communication Asynchronous transfer mode Adaptive forward error control Effective bandwidth |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
