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Register a new userProposal study to improve the performance of Syrian telecommunication optical networks using Routing and Wavelength Assignment (RWA) mathematical model in WDM optical networks
دراسة مقترح تحسين أداء الشبكة الاتصالات الضوئيّة السوريّة عن طريق النموذج الرياضي لعمليّة التوجيه و إسناد طول الموجة في شبكات WDM الضوئيّة
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Tishreen University ورقة بحثية
Publication date
2018
fields
Communication Engineering
and research's language is
العربية
Created by
Shamra Editor
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يتم الإرسال في شبكة WDM باستخدام مسارات ضوئيّة، بحيث يمتلك كل مسار ضوئي توجيهه الخاص عبر الشبكة بالإضافة إلى طول مميّز لهذا المسار. و في حال عدم وجود طول موجي مشترك عبر كامل المسار الضوئي يتم قطع الاتصال. و تعرف مسألة إيجاد التوجيه الطول الموجي لكل مسار بمسألة التوجيه و إسناد طول الموجة RWA [1]. تُمكّن البرمجة الخطّية بالأعداد الصحيحة Integer Linear Programming (ILP) من تمثيل مسألة RWA رياضيّاً. و ذلك عن طريق تحديد كل التوجيهات و الأطوال الموجيّة للمسارات الضوئيّة المطلوبة بأقل عدد ممكن من الأطوال الموجيّة. حيث تعتبر ILP أحد تقنيات الأمثلة أو التحسين Optimization الرياضيّة و التي تقوم بإيجاد القيمة العظمى أو القيمة الدُنيا لتابع مكوّن من مجموعة من المتحوّلات الحقيقيّة الموجبة المحكومة بقيود خطّية إضافيّة. يهدف هذا البحث إلى تحليل أداء الشبكة الضوئيّة السوريّة للاتصالات عن طريق ILP و العمل على تحسين بنية هذه الشبكة، و ذلك من أجل الحصول على أفضل أداء ممكن من حيث الحجب و الاستخدام الأمثلي للموارد المتاحة.
In WDM networks, the end users exchange information with each other through all optical WDM channels, called light-paths. A light-path must occupy the same wavelength on all the fiber links through which it traverses. In a WDM optical network, with a given set of connections, the question of setting up light-paths by routing and allocating a wavelength to each connection is called Routing and Wavelength Assignment (RWA) problem. Integer Linear Programming (ILP) is a mathematical formulation helps in minimizing and maximizing an object function under multiple constraints. This can help in formulating a mathematical model for RWA. This paper studies a mathematical model for RWA in WDM Optical networks which can lead to a good network planning. This paper suggests an enhancement proposal for Syrian telecommunication optical networks using ILP formulation.
References used
Seema Ansari; Adeel Ansari, Comparative Analysis of Routing and Wavelength Assignment Algorithms used in WDM Optical Networks, Research Journal of Applied Sciences, Engineering and Technology 7(13): 2646-2654, 2014
A. Sangeetha; K.Anusudha; Shobhit Mathur; Manoj Kumar Chaluvadi, Wavelength Assignment Problem in Optical WDM Networks, International Journal of Recent Trends in Engineering, Vol 1, No. 3, May 2009
D. Banerjee; B. Mukherjee, A Practical Approach for Routing and Wavelength Assignment in Large Wavelength-Routed Optical Networks, IEEE Journal Selected Areas in Communications, vol. 14, no. 5, pp. 903–908, June 1996
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