کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10334260 | 690355 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The chord version for SONET ADMs minimization
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نظریه محاسباتی و ریاضیات
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چکیده انگلیسی
We consider a problem which arises in optical routing. WDM/SONET rings are a network architecture used by telecommunications carriers for traffic streams. The dominant cost factor in such networks is the total number of add-drop multiplexers (ADMs) used. A list of traffic streams to be routed between pairs of nodes is given. In this paper we consider the problem where we need to assign a route and a wavelength to each traffic stream, minimizing the total number of used SONET ADMs. This is called the chord version of the SONET ADMs minimization problem, to denote the fact that the routing is not given a priori. The best previously known approximation algorithms for this problem have the performance guarantee of 32. We present an improved algorithm with performance guarantee of exactly 107â1.42857. Moreover, we study some natural heuristics for this problem, and give tight analysis of their approximation ratios.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical Computer Science - Volume 349, Issue 3, 16 December 2005, Pages 337-346
Journal: Theoretical Computer Science - Volume 349, Issue 3, 16 December 2005, Pages 337-346
نویسندگان
Leah Epstein, Asaf Levin,