research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
Performance Evaluation of IPv6 Header Compression over MPLS via Satellite
تقييم اداء ضغط عنوان بروتوكول IPv6 عبر بروتوكول MPLS عبر الستلايت

Authors: Safana M. Qasem سفانة محمد قاسم --- Imad J. Mohammed عماد جاسم محمد
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2017 Volume: 58 Issue: 1C Pages: 515-523
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Broadband satellite is playing a main role in provision global coverage and onboard processing ability over IP networks to assess user applications. In order to lower the cost, get better security, solve IPv4 addressing limitation, expand the expected advantages of modern routing and mobility characteristics; the next-generation satellite systems ought to support IPv6 and seamlessly incorporate with terrestrial networks including wireless local loops. Satellite communication links have a number of limitations compared to terrestrial communications networks such as large delay and high header overhead for IPv6 consumes the bandwidth and causes lower transmission effectiveness; however, the quality of service (QoS) (such as delay, jitter, and goodput) is adversely influenced by these demerits. Current paper proposes UDP/IPV6 header compression over Multi-Protocol Label Switch (MPLS) via satellite scheme called (MPLSHCompViaSat). The aim of the proposed scheme is to save the required bandwidth in order to provide better network utilization and consequently improves the efficiency and QoS. For the sake of performance evaluation, the proposed scheme has been tested using Network Simulator (NS2).

تلعب الأقمار الأصطناعية ذات النطاق العريض دورا هاما لتوفير تغطية عالمية وقدرة للمعالجة عبر شبكات بروتوكول الانترنت لتقييم تطبيقات المستخدم. من اجل خفض التكلفة, والحصول على حماية افضل, وحل مشكلة محدودية العناوين ل (IPv4), وتوسيع المزايا المتوقعة من خصائص التوجيه والتنقل الحديثة. يجب على انظمة الاقمار الأصطناعية للجيل القادم دعم ال (IPv6)ودمجه بسهولة مع الشبكات الارضية بما في ذلك الحلقات المحلية اللاسلكية. اتصالات الأقمار الأصطناعية لديها عدد من العيوب مقارنة مع شبكات الأتصالات الارضية بما في ذلك تأخير عالي وكذلك حجم الheader لل IPv6 يكون كبير مما يستهلك عرض النطاق الترددي ويؤدي الى خفض كفاءة الارسال. ومع ذلك, فأن جودة الخدمة (مثل التأخير, الغضب, البيانات المتلقاة) تتأثر سلبا بهذه العيوب.في هذا البحث اقترحنا طريقة ضغط عنوان بروتوكول IPv6 UDP/ عبر بروتوكول MPLS خلال الأقمار الأصطناعية. الهدف من الخطة المقترحة في هذا البحث تقليل عرض النطاق الترددي المطلوب من اجل توفير استخدام افضل للشبكة, وبالتالي يحسن من كفاءة وجودة الخدمة. من اجل تقييم الأداء, قد تم اختبار النظام المقترح بأستخدام محاكي الشبكات(NS2) .

Keywords

IPv4 --- IPv6 --- QoS --- MPLS --- NS-2 simulation.


Article
A COMPARATIVE STUDY OF QOS OVER IPV4/IPV6 USING OPNET MODELER

Author: Faris Khaleel Al-Fayyadh
Journal: JOURNAL OF THI-QAR SCIENCE مجلة علوم ذي قار ISSN: 19918690 Year: 2018 Volume: 6 Issue: 4 Pages: 137-145
Publisher: Thi-Qar University جامعة ذي قار

Loading...
Loading...
Abstract

The increasing number of internet users around the world and their demand for multimedia applications like VoIP and video conference force the network providers to think about Quality of Services. Since these new applications are sensitive to network performance, the demand for larger bandwidth is increased especially when network parameters like Jitter, End to End (E2E) delay and Packet loss play a very important role to guarantee such application in terms of quality. In such environment, Quality of Service (QoS) is considered to be the most important network performance parameter which has a significant effect on multimedia applications like Voice Over Internet Protocol (VoIP) and others. internet protocol IPv6 was designed to improve QoS supported by internet protocol IPv4 and to enhance the reliability of packet based network to handle such services. This paper considered three queuing systems which are First In First Out (FIFO), Priority Queuing (PQ) and Weighted Fair Queuing (WFQ) as a comparative study to investigate their effects on real-time applications in IPv4 and IPv6 networks support. The proposed simulation environment was executed by Optimized Network Engineering Tools (OPNET) Modeler 14.5 where the simulation results are collected and analyzed. The results show that IPv6 with PQ provides better performance for real-time applications, despite that IPv6 with WFQ is more efficient with low priority traffic.

Keywords

IPv4 --- IPv6 --- FIFO --- WFQ --- PQ --- delay --- jitter --- OPNET.

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2018 (1)

2017 (1)