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| 一种可选择最佳带宽的多路路由算法 |
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王洪波1, 张尧学1, 郭国强2, 顾钧3
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1.清华大学,计算机科学与技术系,网络互联实验室,北京,100084;2.常德师范学院,计算机科学系,湖南,常德,415003;3.香港科技大学,计算机科学系,香港
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| 摘要: |
| 实现服务质量保证,在多用户、多请求接入的网络中都是采取为相应请求预留资源的方式,而多请求预留资源使得网络局部出现资源"碎块".单路路由算法不能利用这些资源接入用户请求.为提高网络的资源利用率,采用多路路由方法,在单一通路不能满足连接请求要求时,寻找多条能联合满足要求的一组虚拟不相交并路,并预留资源共同满足用户的服务质量要求.为验证算法的有效性,在ns2模拟器上实现了所提出的算法,并与其他算法进行了性能比较.实验结果表明,提出的算法能很好地适应网络运行状况.在网络轻负载情况下,通信开销小.在网络重负载情况下,使用并行多路增加连接请求的接通率.将此算法应用于支持服务质量保证的多媒体数据网,能充分利用有限的网络资源,提高传输多媒体信息的能力. |
| 关键词: 多路路由 积极出弧 服务质量 虚拟不相交通路 可行并路 |
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| 基金项目:国家自然科学基金资助项目(69873024);国家重点基础研究发展规划973资助项目(G1998030406) |
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| A Multi-Path Routing Algorithm with Optimal Bandwidth |
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WANG Hong-bo,ZHANG Yao-xue,GUO Guo-qiang,GU Jun
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| Abstract: |
| For realizing quality of service guarantee, all multi-user networks adopt the approach of reserving resource per connection requirement, but this will induce many resource pieces in some parts of network, and traditional single routing approach cannot utilize these resources for new connection. In order to improve resource utilization ratio, a multi-path routing algorithm is proposed, which probes and reserves resources in one of several parallel paths according to the status of network and the connection Qos requirements.For verifying the validity.the proposed algorithm is implemented in the simulator of ns3 and its performances is compares with some algorithms.Under the circumstance of the network overload,can combine with several paths to admit new connection,so it improves the network resource utilization ratio and throughput.In conclusion,applying the proposed algorithm to connection-oriented mulrimedia data network will improvethe capability of transmitting multimedia information. |
| Key words: multi-path routing active out arc Qos virtual disjoint path feasible parallel paths |
