基于路径可用性约束的HOWBAN备份路由策略

发布时间：2018-01-21 17:50

  本文关键词： 光无线混合宽带接入网 备份路由 条件约束模型 渐进优化　出处：《重庆邮电大学学报(自然科学版)》2017年06期 　论文类型：期刊论文

【摘要】：备份路由选取,不仅要考虑路径的不相关性,还应考虑业务恢复的资源需求以及备份资源利用率。针对此问题,在光无线混合宽带接入网的融合架构下,确立跨域传输路径可用性与用户对路径可用性需求之间的匹配关系,根据匹配结果分别在光域和无线域划分出2种约束情形,并由此构建用于备份路径选取的条件约束模型,依据此模型选择性预留备份带宽。以提高异构网络资源利用率为目标,将带宽资源划分为工作带宽、备份带宽及空闲带宽,在共享备份原则下,通过渐进优化的方式,按照备份带宽、空闲带宽的先后顺序,完成对工作路径的保护,从而以尽可能少的空闲带宽消耗来保障节点间的连接可用性。数值结果表明,提出的策略有效提高了网络故障恢复率和备份资源效率。
[Abstract]:Backup route selection should not only consider the irrelevant path, but also consider the resource requirements of service recovery and backup resource utilization. In view of this problem, in the hybrid optical wireless broadband access network architecture. The matching relationship between cross-domain transmission path availability and users' requirements for path availability is established. According to the matching results, two kinds of constraint cases are divided in the optical domain and wireless domain, respectively. According to this model, the backup bandwidth is selectively reserved, and the bandwidth resources are divided into working bandwidth in order to improve the utilization ratio of heterogeneous network resources. Backup bandwidth and free bandwidth, under the principle of shared backup, through progressive optimization, according to the backup bandwidth, free bandwidth sequence, the completion of the work path protection. The numerical results show that the proposed strategy can effectively improve the network failure recovery rate and backup resource efficiency.
【作者单位】： 重庆邮电大学重庆高校市级光通信与网络重点实验室;
【基金】：国家自然科学基金资助项目(61371097,61401052,61271261) 重庆市青年科技人才培养计划(CSTC2014KJRC-QNRC)~~
【分类号】：TN92
【正文快照】： 0引言网络资源趋紧已成业界共识,如何高效使用有限的带宽资源愈发成为研究焦点[1-2]。作为网络密集度最高的“最后一公里”接入,亟需一种高效的接入解决方案来缓解带宽趋紧之势,光无线混合宽带接入网(hybrid optical wireless broadband access net-works,HOWBAN)应运而生,因，

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