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Applying TOPSIS Method for Software Defined Networking (SDN) Controllers Comparison and Selection

استخدام طريقة TOPSIS لمقارنة واختيار متحكمات الشبكات المعرفة بالبرمجيات SDN

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 Publication date 2017
and research's language is العربية
 Created by firas zoubari




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Current traditional IP networks start to be complex as the demands of the users are ever-growing. Software Defined Network (SDN) is a new paradigm to ease the management of the network and make the network programmable by decoupling the control plane and forwarding plane (such as switch and router). A centralized controller is used to manage the control plane, and it interacts with the forwarding plane using a standardized OpenFlow protocol. However, many controllers are used recently such as POX, Ryu, ONOS, and OpenDaylight. The important question is which is the best controller to use in our network and fits our network’s goals? To answer this question, a decision-making method is proposed in this paper. First, four SDN controllers are selected, and five criteria are analyzed to collect these controllers’ properties. Then a Multi-Criteria Decision Making method named TOPSIS is used to rank the controllers and choose the best one. By applying this method, a comparative study is done to evaluate the four controllers in an environment of LAN topology, and “Ryu” controller is selected as the best one based on our criteria.


Artificial intelligence review:
Research summary
تتناول هذه الورقة البحثية مشكلة اختيار أفضل وحدة تحكم لشبكات المعرفة برمجياً (SDN) من بين عدة وحدات تحكم متاحة مثل POX وRyu وONOS وOpenDaylight. تُقدم الورقة طريقة لاتخاذ القرار باستخدام طريقة TOPSIS، وهي تقنية متعددة المعايير لتحديد الحل الأمثل بناءً على مجموعة من المعايير المحددة. تم تحليل خمسة معايير رئيسية تشمل الواجهات المستخدمة، الوثائق المتاحة، إصدار OpenFlow المدعوم، لغة البرمجة المستخدمة، والأداء من حيث زمن التأخير (RTT). بناءً على هذه المعايير، تم استخدام طريقة TOPSIS مع أوزان مستمدة من طريقة الانتروبيا لتحديد أهمية كل معيار. أظهرت النتائج أن وحدة التحكم Ryu هي الأفضل وفقاً للمعايير المدروسة، حيث كانت الأقرب للحل المثالي والأبعد عن الحل غير المثالي. تقترح الورقة أيضاً أن يتم في المستقبل إضافة معايير أخرى مثل متطلبات النظام للأجهزة واختبار الشبكات الأكبر حجماً.
Critical review
تعتبر هذه الورقة خطوة مهمة نحو تحسين عملية اختيار وحدات التحكم لشبكات المعرفة برمجياً باستخدام منهجية علمية. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها. أولاً، الورقة تركز بشكل كبير على معايير محددة دون النظر إلى بعض الجوانب الأخرى التي قد تكون مهمة مثل الأمان وقابلية التوسع. ثانياً، التجارب تمت في بيئة LAN صغيرة، مما قد لا يعكس الأداء الفعلي في بيئات الشبكات الكبيرة مثل مراكز البيانات. أخيراً، استخدام طريقة TOPSIS مع أوزان الانتروبيا هو خطوة جيدة، ولكن يمكن أيضاً مقارنة النتائج باستخدام طرق أخرى متعددة المعايير مثل AHP أو ANP للتحقق من صحة النتائج.
Questions related to the research
  1. ما هي المعايير الخمسة التي تم استخدامها لتقييم وحدات التحكم في هذه الدراسة؟

    المعايير الخمسة هي: الواجهات المستخدمة، الوثائق المتاحة، إصدار OpenFlow المدعوم، لغة البرمجة المستخدمة، والأداء من حيث زمن التأخير (RTT).

  2. لماذا تم اختيار طريقة TOPSIS مع أوزان الانتروبيا في هذه الدراسة؟

    تم اختيار طريقة TOPSIS لأنها فعالة وسريعة في مقارنة واختيار البدائل، وتم استخدام أوزان الانتروبيا لتحديد أهمية كل معيار بناءً على كمية المعلومات المتاحة.

  3. ما هي وحدة التحكم التي تم اختيارها كأفضل وحدة تحكم وفقاً للمعايير المدروسة؟

    تم اختيار وحدة التحكم Ryu كأفضل وحدة تحكم وفقاً للمعايير المدروسة.

  4. ما هي الاقتراحات المستقبلية التي قدمتها الورقة لتحسين الدراسة؟

    اقترحت الورقة إضافة معايير أخرى مثل متطلبات النظام للأجهزة واختبار الشبكات الأكبر حجماً، وكذلك استخدام طرق متعددة المعايير أخرى مثل AHP أو ANP للتحقق من صحة النتائج.


References used
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About POX | NOXRepo. http://www.noxrepo.org/pox/about-pox/. Accessed 26 Apr 2016
Ryu SDN Framework. http://osrg.github.io/ryu/. Accessed 26 Apr 2016
The OpenDaylight Platform | OpenDaylight. https://www.opendaylight.org/. Accessed 26 Apr 2016
ONOS - A new carrier-grade SDN network operating system designed for high availability, performance, scale-out. http://onosproject.org/. Accessed 26 Apr 2016
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