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Studying the performance and the Efficiency of random linear network coding in achieving the reliable transfer of data in losing wireless networks

دراسة أداء و فعالية ترميز الشبكة الخطي العشوائي في تحقيق النقل الموثوق للبيانات في الشبكات اللاسلكية ذات الضياع

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 Publication date 2017
and research's language is العربية
 Created by Shamra Editor




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Wireless networks suffer from frequent loss of packets for many reasons such as interference, collision and fading. This makes wireless medium unreliable medium for data transfer. The main methods for ensuring the reliability in this medium are using transmission control protocol (TCP) and the automatic repeat request (ARQ). Recently, network coding has been found as new technology that changes the traditional forwarding method (Store- and- Forward) in the networks to more effective and intelligent method (Code- and- Forward), which contributes to the increase of both capacity and throughput of these networks. In this research, random linear network coding is used as promising technology that aims to achieve the reliable transfer of data in losing wireless networks, and studying the enhancement that this technology presents to the performance of these networks in unicast and multicast transmission. For evaluating the efficiency of this technology and comparing its performance with the performance of reliable transfer protocols, we use the networks simulator (NS3). Simulation results showed that random linear network coding achieve the reliable transfer of data with bigger throughput and less delay and number of transmission compared with the protocols (TCP, ARQ).


Artificial intelligence review:
Research summary
تناقش هذه الدراسة مشكلة ضياع الرزم في الشبكات اللاسلكية وتأثيرها على وثوقية نقل البيانات. تقترح الدراسة استخدام تقنية ترميز الشبكة الخطي العشوائي (RLNC) كحل واعد لتحسين أداء الشبكات اللاسلكية في حالات الإرسال الوحيد والمتعدد. تم استخدام محاكي الشبكات NS3 لتقييم فعالية هذه التقنية ومقارنتها مع بروتوكولات النقل التقليدية مثل TCP وARQ. أظهرت نتائج المحاكاة أن تقنية RLNC تحقق نقل موثوق للبيانات بإنتاجية أكبر وتأخير زمني أقل وعدد عمليات إرسال أقل مقارنة بالبروتوكولات التقليدية. تركز الدراسة على كيفية تحسين أداء الشبكات اللاسلكية باستخدام RLNC من خلال دمج عدة رزم في رزمة مرمزة واحدة، مما يسهم في تصحيح الضياع بشكل فعال وسريع. تم إجراء مقارنة بين أداء RLNC وTCP في حالة الإرسال الوحيد، وأظهرت النتائج أن RLNC يتفوق على TCP في تحقيق وثوقية النقل وتقليل زمن الإرسال. كما تم مقارنة أداء RLNC مع ARQ في حالة الإرسال المتعدد، وأظهرت النتائج أن RLNC يقلل من عدد عمليات الإرسال ويزيد من فعالية تصحيح الضياع. توصي الدراسة بمزيد من البحث في استخدام RLNC لتطبيقات الفيديو في الشبكات اللاسلكية المحلية ذات الضياع.
Critical review
دراسة نقدية: تقدم هذه الدراسة إسهاماً مهماً في مجال تحسين أداء الشبكات اللاسلكية باستخدام تقنية ترميز الشبكة الخطي العشوائي. ومع ذلك، يمكن توجيه بعض النقد البنّاء للدراسة. أولاً، لم تتناول الدراسة بشكل كافٍ تأثير العوامل البيئية المختلفة على أداء تقنية RLNC، مثل التغيرات في الطقس أو التداخلات من الأجهزة الأخرى. ثانياً، كان من الممكن أن تكون الدراسة أكثر شمولية إذا تم اختبار التقنية على أنواع مختلفة من الشبكات اللاسلكية وليس فقط على شبكات Ad Hoc. ثالثاً، لم يتم التطرق إلى التكلفة الحسابية لتطبيق تقنية RLNC وتأثيرها على موارد الأجهزة المستخدمة في الشبكة. وأخيراً، كان من الممكن أن تكون الدراسة أكثر إفادة إذا تم تضمين تحليل اقتصادي يوضح الفوائد المالية لتطبيق هذه التقنية مقارنة بالبروتوكولات التقليدية.
Questions related to the research
  1. ما هي المشكلة الأساسية التي تعاني منها الشبكات اللاسلكية والتي تناولتها الدراسة؟

    المشكلة الأساسية هي ضياع الرزم بسبب التداخلات والتصادم والخفوت، مما يجعل الوسط اللاسلكي غير موثوق لنقل البيانات.

  2. ما هي التقنية الجديدة التي تقترحها الدراسة لتحسين أداء الشبكات اللاسلكية؟

    تقترح الدراسة استخدام تقنية ترميز الشبكة الخطي العشوائي (RLNC) لتحسين أداء الشبكات اللاسلكية.

  3. ما هي الأدوات المستخدمة لتقييم فعالية تقنية RLNC في الدراسة؟

    تم استخدام محاكي الشبكات NS3 لتقييم فعالية تقنية RLNC.

  4. ما هي النتائج الرئيسية التي توصلت إليها الدراسة بشأن أداء تقنية RLNC مقارنة بالبروتوكولات التقليدية؟

    أظهرت النتائج أن تقنية RLNC تحقق نقل موثوق للبيانات بإنتاجية أكبر وتأخير زمني أقل وعدد عمليات إرسال أقل مقارنة بالبروتوكولات التقليدية مثل TCP وARQ.


References used
Andrea Goldsmith, ―Wireless Communication‖, Cambridge University Press, 1st South Asian Edition 2009
P. Bhagwat, P. P. Mishra, and S. K. Tripathi, ―Effect of topology on performance of reliable multicast communications,‖ in Proc. IEEE INFOCOM, Toronto, Canada, June 1994, pp. 602–609
B. Sardar and D.Saha," A survey of TCP enhancements for last-hop wireless networks," IEEE. Surveys and Tutorials, Vol. 8, pp. 20-34, 2006
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