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Improving the throughput of reliable transfer in multi hop wireless networks using sliding window and fast retransmit with random linear network coding

تحسين إنتاجية النقل الموثوق في الشبكات اللاسلكية متعددة القفزات باستخدام النافذة المنزلقة و إعادة الإرسال السريع مع ترميز الشبكة الخطي العشوائي

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 Publication date 2016
and research's language is العربية
 Created by Shamra Editor




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Random Linear Network Coding (RLNC) is considered to be one of the promised solutions to achieve the reliability of transmission in multi hop wireless networks, Since it is based on correcting the loss of the packets in the medium through the continuity of transmitting coded packets from each segment until receiving acknowledgment of getting the required number of these packets for decoding. However, because of the nature of wireless medium and multi hops transfer, a loss or delay of the ACK may occur, which causes transmitting extra packets and time delay to the next segments, consequently decreasing the throughput of these networks. In this research, we propose a new transmission mechanism for reliable transfer in multi hops wireless networks through using the concepts of sliding window and fast retransmit with RLNC, for transmitting packets of consequent segments in specific continues flow and fast correcting the loss in these segments. Simulation results show that proposed mechanism decreases the time delay for transmission process and increases the transfer throughput of these networks.


Artificial intelligence review:
Research summary
يستعرض البحث آلية جديدة لتحسين وثوقية النقل في الشبكات اللاسلكية متعددة القفزات باستخدام ترميز الشبكة الخطي العشوائي (RLNC) مع مفهومي النافذة المنزلقة وإعادة الإرسال السريع. يهدف البحث إلى معالجة مشكلة ضياع الرزم وتأخير الإشعارات في الشبكات اللاسلكية، مما يؤدي إلى إرسال فائض من الرزم وتأخير زمني. تعتمد الآلية المقترحة على إرسال رزم مرمزة من كل مقطع حتى استلام العدد المطلوب من الرزم، مع استخدام النافذة المنزلقة لإرسال المقاطع المتلاحقة بشكل مستمر وإعادة الإرسال السريع لتصحيح الضياع. أظهرت نتائج المحاكاة أن الآلية المقترحة تقلل من التأخير الزمني وتزيد من إنتاجية النقل مقارنة بالآليات التقليدية. تم اختبار الآلية في حالات مختلفة لعدد القفزات ونسبة الضياع، وأظهرت النتائج تحسينًا في الأداء بنسبة تتراوح بين 9% و 20%.
Critical review
دراسة نقدية: يقدم البحث حلاً مبتكراً لمشكلة وثوقية النقل في الشبكات اللاسلكية متعددة القفزات، ويعتمد على مفاهيم متقدمة مثل ترميز الشبكة الخطي العشوائي والنافذة المنزلقة. ومع ذلك، يمكن القول أن البحث يفتقر إلى دراسة تأثير الآلية المقترحة في بيئات حقيقية ومعقدة، حيث قد تواجه الشبكات اللاسلكية تحديات إضافية مثل التداخل والتشويش. كما أن البحث لم يتناول بشكل كافٍ تأثير العوامل البيئية والمادية على أداء الآلية المقترحة. يمكن أن تكون هناك حاجة لإجراء تجارب ميدانية واختبارات عملية لتأكيد فعالية الآلية في ظروف متنوعة.
Questions related to the research
  1. ما هي المشكلة الرئيسية التي يعالجها البحث؟

    البحث يعالج مشكلة ضياع الرزم وتأخير الإشعارات في الشبكات اللاسلكية متعددة القفزات، مما يؤدي إلى إرسال فائض من الرزم وتأخير زمني يقلل من إنتاجية الشبكة.

  2. ما هي الآلية المقترحة في البحث لتحسين وثوقية النقل؟

    الآلية المقترحة تعتمد على استخدام ترميز الشبكة الخطي العشوائي مع مفهومي النافذة المنزلقة وإعادة الإرسال السريع لإرسال رزم مرمزة من كل مقطع حتى استلام العدد المطلوب من الرزم، مع تصحيح سريع للضياع.

  3. ما هي النتائج التي توصل إليها البحث من خلال المحاكاة؟

    أظهرت نتائج المحاكاة أن الآلية المقترحة تقلل من التأخير الزمني وتزيد من إنتاجية النقل في الشبكات اللاسلكية متعددة القفزات مقارنة بالآليات التقليدية.

  4. ما هي التوصيات المستقبلية التي يقترحها البحث؟

    البحث يقترح دراسة أداء الآلية المقترحة في تطبيقات الزمن الحقيقي في الشبكات اللاسلكية متعددة القفزات، وكذلك دراسة تطبيقها في شبكات الحساسات اللاسلكية، حيث من المتوقع أن تعمل بفعالية مع الموارد المحدودة لهذه الشبكات.


References used
SARKAR, S.K.; BASAVARAJU, T.G.; PUTTAMADAPPA, C. Ad Hoc Mobile Wireless Networks. Principles, Protocols, and Applications. Taylor & Francis Group, 2008, 835
LOYD, D.B; SIVAKUMAR, D. A STUDY ON ADVANCEMENTS OF NETWORK CODING IN WIRELESS MESH NETWORK. International Journal of Science, Technology & Management Volume No 04, Special Issue No. 01, March 2015, 1392- 1400
(KARAFILLIS, P.; FOULI, K.; PARANDEHGHEIBI,A.;MÉDARD, M. An Algorithm for Improving Sliding Window Network Coding in TCP. 47th Annual Conference on Information Sciences and Systems (CISS) (March 2013
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