کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11032897 1645043 2019 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Distributed sub-light-tree based multicast provisioning with shared protection in elastic optical datacenter networks
ترجمه فارسی عنوان
ارائه توزیع چند رسانه ای مبتنی بر زیر نور درخت با حفاظت مشترک در شبکه های مرکز داده نوری الاستیک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
چکیده انگلیسی
In an elastic optical network, it is critical to protect a multicast request against any single link failure with minimum spectrum consumption. However, conventional single light-tree based multicast provisioning schemes are spectrum inefficient with low modulation level employed. Since a multicast service can be hosted in multiple geographically-distributed datacenters in an elastic optical datacenter network (EODN), we construct several distributed sub-light-trees (DSLTs) to serve the users of a multicast request. Further, we protect each source-destination pair of a primary DSLT by a link-disjoint backup path against any link failure. Spectrum resource can be shared among the backup paths of different multicast requests (i.e., cross-sharing) or among the primary paths and the backup paths of the same multicast request (i.e., self-sharing) if they do not fail simultaneously. To formulate such a problem, an Integer Linear Program (ILP) is developed for a static traffic scenario. We also propose an efficient heuristic approach for the dynamic traffic scenario. Numerical results show that the proposed DSLT-based multicast provisioning with shared protection scheme outperforms conventional survivable multicast provisioning schemes based on single light-tree with or without shared protection in terms of spectrum efficiency and blocking probability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Switching and Networking - Volume 31, January 2019, Pages 39-51
نویسندگان
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