Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userEvaluation of quality of service of MPLS-DiffServ network's
تقييم جودة الخدمة لشبكات MPLS-DIFFSERV
1423
0 73
0
(
0
)
Created by
Shamra Editor
Ask ChatGPT about the research
دفعت الرغبة لتحسين الأداء الكُلّي لشبكات IP إلى إنشاء بنى QoS جديدة. التطور الحاصل حاليا في تأمين جودة الخدمة مبني على DiffServ . تقسّم DiffServ الحركة إلى عدد صغير من الأصناف و تقوم بحجز المصادر على أساس كل صنف. في هذه البنية تُعلّم الرزم بناءً على حقل DSCP في الموجهات الطرفية و يتم كذلك إعطاء الأولوية للرزم بناء على قيمة هذا الحقل. بالمقابل, فإن MPLS هي آلية توجيه سريعة تعتمد على الوسوم. من مزايا MPLS الرئيسية دعمها لهندسة الحركة و الذي يؤدي إلى استخدام أفضل لمصادر الشبكة مثل سعة الوصلة. يؤمن الاستخدام المتكامل لـ MPLS (كآلية إرسال) مع DiffServ (كآلية QoS) ضماناً لتقديم جودة خدمة عالية و خاصة بالنسبة لتطبيقات الزمن الحقيقي (مثل خدمة الصوت عبرIP و مؤتمرات الفيديو). تم في بحثنا هذا تقييم أداء شبكات MPLS-DiffServ, قمنا بدراسة بارامترات جودة الخدمة مثل التأخير و تغير التأخير و زمن تحميل الملفات و زمن الترتيل و استخدام الوصلة و الإنتاجية و فقدان الرزم لأنماط متعددة من الحركة (Voice,Video,FTP) و ذلك باستخدام محاكي OPNET. تمت مقارنة النتائج مع شبكات MPLS و شبكات IP الصافية. أظهرت النتائج تفوق شبكات MPLS-DiffServ على الشبكات الأخرى و يبدو ذلك واضحا من ناحية تخفيض التأخير و تغير التأخير و زمن الاستجابة لتحميل الملفات و زمن الترتيل بالإضافة إلى انخفاض ضياع الرزم و الاستخدام الأمثل لسعة الوصلة.
The desire to improve the overall performance of IP network leads to designing new QoS achitectures. The new Enhancement in providing quality of service (QoS) on the Internet is based on the Different Services (DiffServ). DiffServ divides traffic into small classes and allocates network resources on a per-class basis. In this architecture, packets are marked with different DiffServ code points (DSCP) at edge routers, and the priority for packets is given via the value of this field. On the other hand, MPLS is a fast forwarding mechanism that depends on Label's. The main advantage of MPLS is its support for traffic engineering which results in best utilization of network's resources like link capacity. The integration of using MPLS (as a forwarding mechanism) with DiffServ (as a QoS mechanism) offer high Quality of service especially for real time applications (such as VoIP, Video Conference). We evaluate the performance of MPLS-DiffServ networks in our research. We study QoS metrics as delay, variation of delay, upload response time, link utilization, packet loss for several kinds of traffic (Voice, Video, FTP) by using OPNET Simulator and we showed its superiority over MPLS network and pure IP ones. We compare our results with MPLS networks and pure IP ones. Our results showed superiority of MPLS-DiffServ over other kinds of networks. This is clear in decreasing delay ,delay variation, upload response time, queuing delay, reduction of lost packets and best utilization of link capacity.
References used
M. Tanvir and A. Said, "Decreasing Packet Loss for QoS Sensitive IP Traffic in DiffServ Enabled Network Using MPLS TE", International Symposium in Information Technology, Kuala Lumpur, Malaysia, 2(2010). pp 789-793
F. Le-Faucheur, B. Davie, S. Davari, P. Vaananen, R. Krishnan, P. Cheval and J. Heinanen, "Multi-Protocol Label Switching (MPLS) Support of Differentiated Services", RFC 3270, May 2002
Dongli Zhang, Dan Ionescu: “QoS Performance Analysis in Deployment of DiffServ Aware MPLS Traffic Engineering". Eighth ACIS International Conference on Software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing (SNPD) 2007. pp 963-967
rate research
Read More
With the widespread of new fast networks and need for critical application, survivability,
reliability and quality of service became an sensational issue. Recovery mechanism used by IP
network spent a lot of time from several seconds to minutes. Th
is causes large drop in data
packages. MPLS is a next generation backbone architecture, which can speed up packet forwarding
to destination by label switching especially with its traffic engineering capability. MPLS recovery
mechanisms are increasing in popularity because they can guarantee fast restoration and high QoS
assurance.
We simulated in our research several scenarios for link failure using fast reroute technology
in MPLS network's using Opnet. Results lead us to consider this technique successful in limiting
delay and packet drop in recovery cycle.
The study aims to investigate hotel service quality effect on customer loyalty, by determining service quality dimensions (responsiveness, tangibility, sympathy) effect on customer loyalty. The study conducted on convenient sample of hotel customers
in Lattakia.
The study results show that hotel service quality affects customer loyalty. Whereas there is a positive relationship between hotel service quality and customer loyalty. Tangibility has the largest effect of service quality dimensions on customer loyalty, then responsiveness and finally sympathy.
The objective of this research is to measure and evaluating the
quality of service in the private commercial banks in Syria and for
the purpose of determining the basic dimensions of quality of
service that customers are looking for and preferred,
even these
banks are able to focus and emphasize it and use it to enhance
customer satisfaction and retention, and to achieve the objectives of
the study are designed questionnaire was distributed to a random
sample of customer three private commercial banks in the city of
Hama (BEMO bank - Bank of Syria and Almahjr- Arab Bank).
This study discusses The quality of insurance service in the Syrian Insurance sector
from the viewpoint of the insured. The aim is to determine the standards used to measure
the quality of insurance service. It determines the presence level of thes
e standards in the
offered services. It also compares the quality of service in the public and private sectors.
This study concludes the dependence on six standards for the quality of insurance
service It clarifies that all these standards exist in a level exceeds the average slightly, but
the private sector surpasses the public sector concerning the third and sixth standards and
the level of quality.
This study recommends the necessity of improving the level of the quality of service
and responses to the insurance needs which are related to the six proposed standards.
This study also recommends the necessity of applying its method to do regular tests
on the quality of the insurance service in order to determine the positive and negative
points so that the positive points can be established and the negative points can be avoided.
This contributes to the improvement of the quality of insurance services in the Syrian
Insurance sector.
This research aims at evaluating service quality at tartous call
center in Syrian Coast. This is achieved by concentrating on the
service performance ( SERVPERF) to measure the recognized
service quality. The data for this research were collected using a
questionnaire . 200 had been distributed. 179 were returned, which
amounts for 89.5% of the distributed questionnaires.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
