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Dalal-CW1.docx
COLLEGE OF ENGINEERING
BEng (Honours) in Telecommunications Engineering
Academic Year: 2018-19 Semester: A
Course work:
QOS Evaluation of a Corporate WAN
MHH624695: Simulating Multimedia Networks
Submitted by
Dalal hamed AL Wahaibi 11807
Budoor salim AL Gazali 120543
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Table of Contents LIST OF FIGURES ii ABSTRACT iii INTRODUCTION 1 problem statement 1 problem analysis 1 network design 2 RESULT AND ANALYSIS 6 scenario number 1 6 scenario number 2 9 scenario number 3 11 scenario number 4 13 scenario number 5 14 CONCLUSION 16
Figure 1 Cyber Oman LLC Network 7
Figure 2 Network of Muscat office 8
Figure 3 Salalah Branch Network 9
Figure 4 Dubai Branch Network 9
Figure 5 the network with quality of the service 9
Figure 6 In Email Download Response time(sec) 11
Figure 7 In FTP Download Response time (sec) 12
Figure 8 HTTP page response time (sec) 12
Figure 9 print traffic received \sent (bytes/sec) 13
Figure 10 Point –to-point throughput of the PPP DS1 13
Figure 11 Utilization of PPP DS1 13
Figure 12 Packet Delay in Video Conferencing 14
Figure 13 End to End delay occurs in the video conferencing 14
Figure 14 The delay variation in the voice 15
Figure 15 the End-to-End delay in VoIP(sec) 15
Figure 16 the throughput of PPP DS1 16
Figure 18 Video Conferencing Packet Delay 16
Figure 19 Voice Packet Delay 17
Figure 20 Voice packet end to end delay(sec) 17
Figure 21 Throughput and Utilization of PPP DS3 Muscat to Dubai 18
Figure 22 Voice Jitter (sec) 18
Figure 23 jitter of voice (sec) 19
Figure 24 video conferencing packet Delay variation 19
Figure 25 The average in voice packet end to end 20
ABSTRACT
Along the most recent advancement in more noteworthy transmission capacity and system speed, the utilization of constant application, for example, the VoIP along with video spilling, as well as video conferencing and the FTP turn out to be generally utilized. though the non-constant application, for example, print, Email, and web perusing are not touchy to the QoS parameters and ongoing applications are delicate to the QoS parameters. In this way, this task planned to enter nature of administration in the cyber Oman LLC organization and see the improvement in the system. This task comprises of a presentation which clarifies the given situation, arrange a show with the structure set up and setup, result investigation, end and suggestion for the organization. At the point when every one of those is done, the essential information of the nature of administration is comprehended, its advantage was found and the best answer for a system of the organization has been given.
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INTRODUCTION
There are two major types of network, LAN & WAN. LAN encompasses computers and peripherals connected to a server within a distinct geographic area such as an office or a commercial establishment. Whereas WAN (wide area network) is a geographically distributed private telecommunications network that interconnects multiple local area networks (LANs). However, we need to take precautionary measurements to avoid congestion in the network and minimize the delay in the traffic being sent and received.
Problem Statement
Cyber Oman L.L.C works in three areas that are Muscat along with Dubai as well as Salalah where Muscat is the main office location or a headquarter and Salalah along with Dubai are its parts or divisions. Every single one of these has an alternate number of workstations. To include, there are 20 workstations in the fundamental place and 10 workstations in every branch. The headquarter is associated with each branch by utilizing PPP DS1. The clients speak with one another between these areas with reasonable servers by utilizing different applications, for instance, HTTP, Email, Print, VoIP, FTP and video conferencing. Further, all servers are situated in Muscat. The organization arranges execution was acceptable and functions admirably in the different areas for the non-constant applications, for example, document exchange and Email. Be that as it may, the execution of the organization breaks down impressively in the continuous applications, for example, voice and video conferencing in view of the expansion in the number of clients. Accordingly, the system will have more weight since more parcels and information sent, which will influence the execution of the system so there will be more postponements and traffic. Utilizing the fitting applications and appropriate sorts of administrations like lining will extend the nature of the administration
Problem Analysis
Countless are utilized in the system without confronting any issues however controlling and dealing with the information are required. More often than not, blockage or traffic happens in the system continuously applications like video and voice since loads of clients send information. In this way, the system needs help, for example, QoS to control or deal with the clog or traffic. cyber oman L.L.C is wanting to broaden its processing offices in light of the fact that the number of clients expected to expand which will affect the organization arranges execution. As to, this coursework search for the best strategy to turn away clog and traffic. In this way, structuring the system and survey the nature of administration (QoS) in the system will be done in this coursework by utilizing a reproduction program which is Riverbed. In this structuring, there will be 20 workstations in Muscat, ten in Salalah and ten in Dubai. Additionally, five situations will be there.
The first scenario contains non-real time applications such as Email, FTP, Web and Print across the locations over PPP DS1 link. The second scenario shows the same applications as previous and adds real time applications such as VoIP and VC (Video Conferencing) over PPP DS1 link across all the locations. The third scenario focuses on the QoS of the applications mentioned in the second scenario. The fourth scenario upgrades the link from PPP DS1 to PPP DS3 while everything remains similar as before. The fifth scenario is configured with WFQ (Class based) QoS to provide better performance for real time applications. All the scenarios are simulated for 5 -30 minutes. The investigation will be finished by contrasting the outcomes acquired in every situation and the impact in the execution.
Network Design
The main office is located in Muscat and two others in Salalah and Dubai individually all. In all, the structure of Oman System LLC, which has three branches in various areas, will be clarified.
Figure 1 Cyber Oman LLC Network
The Wide area network is associated by means of DSP connect (PPP DS1) that give 1.544Mbps. The figure above demonstrates that Cyber Oman L.L.C organization comprises of three branches Muscat, Salalah, and Dubai, where Muscat is the headquarter. The arrangement of this system is finished by this means:
· Creating Applications Profiles for different applications for the users.
· Configuring the QoS for the network.
· Applying the profiles to the workstations and servers.
· Establishing 100 baseT connectivity between client workstations and switch.
· Connecting Application Servers over 1000baseX link to the switch.
· Connecting the routers at locations using DSP links.
Figure 2 Network of Muscat office
The figure above, shows the Head Office network for Cyber LLC in Muscat, Sultanate of Oman. HO has a total 20 number of client workstations and 3 servers. Tow server for Non-Real Time which hosts Email, FTP, Web and Print services and the third one for Real Time which hosts VoIP & VC for the users of the company across all 3 locations. A gateway is placed which connects to Dubai and Salalah branches.
Figure 3 Salalah Branch Network
The company has its branches in Dubai and Salalah. Each branch consists of 10 workstations assigned with different application profiles and router that connects the branches to HO which is in Muscat.
Figure 5 the network with quality of the service
After simulating all the scenarios, we found that applying QoS is necessary for this network if we want the company to use real-time applications such as VoIP and Video Conferencing. As the network gets congested when we allow users to use real time applications without applying the QoS and upgrade for the required links and hardware. We have named the workstations, routers and other peripherals according to their role/profile configured on them to make it easy for the understanding.
Muscat (HO) has 16 numbers of workstations for each non-real time applications (Email, FTP, Web, and Print) and 4 numbers of workstations configured for each real time applications (VoIP and Video Conferencing). Dubai and Salalah branches have 6 workstations configured for non-real time applications and 4 workstations for real time applications.
RESULT AND ANALYSIS
This results for simulating each scenario are described below with the charts for better understanding. Parameters used to generate the results are as below;
· Email & FTP: Response time for Download and Upload.
· Web: Page Response Time
· Print: Traffic Sent / Received (bytes/sec)
· VoIP & VC: Traffic Dropped (packets/sec), Packet Delay Variation and End-to-End Delay.
· Link: Throughput Send / Receive, Utilization Send / Receive .
Scenario Number 1
In this scenario, we will test the existing company network with only non-real time applications to examine if there is any congestion in the existing network.
Figure 6 In Email Download Response time(sec)
The result of Email, in this figure, shows the delay in Email download response time and remains constant between 120s -300s. The average email response time 0.060 (in second) shows that the average email download response dose does not effect in the transfer of the other application.
Figure 7 In FTP Download Response time (sec)
The result of FTP, the time elapsed between sending a request and receiving the response packet. The graph shows that the first request was received in 100s time and the average constant in 0.30s then reduce to 0.24 average then almost constant.
Figure 8 HTTP page response time (sec)
The page response time increases from 100 to 150 seconds, in the graph shows the http average maximum 0.25 seconds then reduse to 0.24-0.23.
Figure 9 print traffic received \sent (bytes/sec)
in the print traffic received and sent, both same average is 0 until 1.9s then increase the average maximum traffic sent & received reach 190 bytes/sec.
Figure 10 Point –to-point throughput of the PPP DS1
In the point to point throughput, the graph shows it increase reaches to 14 then reduce.
Figure 11 Utilization of PPP DS1
In this graph shows the capacity used in this network, it reaches 4 %,
Scenario Number 2
In this scenario, we will test the existing company network with non-real time and real time applications.
Figure 12 Packet Delay in Video Conferencing
In the video conferencing packet delay variation, the average reaches 1.7s jitter value.
Figure 13 End to End delay occurs in the video conferencing
In the video conferencing packet (End-to-end Delay) the average increase to 0.70s
Figure 14 The delay variation in the voice
In the voice( packet delay variation) the average reaches 1.7s jitter value .it is increasing to 0.47s then decrease.
Figure 15 the End-to-End delay in VoIP(sec)
In the voice packet (End-to-end Delay) the average increase to maximum 2.0
The point to point throughput and utilization, in the graph shows the capacity transmitted by used DS1 link .it reaches 100 from Muscat to Salalah
Figure 16 the throughput of PPP DS1
Scenario Number 3
This scenario presents one type of queuing techniques which is priority queuing. This technique is implemented to solve the congestion problem occurs in the previous scenarios. In this technique each application is set a specific priority in the queue, the application with high priority is served first. Then, when this application request is finished, the other applications with lower priority are served. So, each application is served upon its order in the queue. Here in this network, voice has higher priority, then video conferencing and the lowest priority are for non-real time applications. The graphs show the comparison between this scenario and the second scenario.
Figure 18 Video Conferencing Packet Delay
In the average in video conferencing packet variation in scenario2 it reaches to 1.7s but with QOS in scenario 3 as shown it is reduced to 0.7s
In the average voice packet delay variation from 0.80, it is reduced to 0.11s with applying QOS in scenario three.
Figure 20 Voice packet end to end delay(sec)
The average in voice packet (End-to-End Delay) it is reduced from 2s in scenario tow to 0.6s with add QOS.
Scenario Number 4
In this scenario, we will change the DSP link between Muscat and branches from DS1 link to DS3 link to more capacity.
Figure 21 Throughput and Utilization of PPP DS3 Muscat to Dubai
The average in point-to-point throughput (backets/sec) of the third scenario reaches 130bps then increase up to 200 bps when upgrading the link PPP DS3
In the average voice jitter, it reduces it comes 0 when using PPP DS3 link
Scenario Number 5
The fifth scenario is configured with WFQ (Class based) QoS to provide better performance for real time applications.
Figure 23 jitter of voice (sec)
The average in voice jitter (sec) it reduces the value of jitter.
Figure 24 video conferencing packet Delay variation
The average in video conferencing packet Delay variation it is reduced in the five scenarios when use Weighted fair queuing (wFQ)
Figure 25 The average in voice packet end to end
The average in voice packet end to end in scenario 5 it is less than scenario 4 that means more batter with WFQ.
CONCLUSION
As per the outcome, the postponement is close to zero and less traffic in the system. Furthermore, the fifth situation displays the changing in the connection between the switch and switch in headquarter or the main office that is located in Muscat which results in few changes in the defer which happen because of expanding the information rate. It is seen in the wake of getting the outcome, that the primary situation has more traffic on the grounds that no nature of administrations connected there. Additionally, the connection utilized between two switches is PPP DS1 which has 1.54 megabyte per second. The second situation, utilizing ongoing applications like voice and video in a few workstations of each branch not all. Third situation present nature of administrations, which improve the execution of the system and give greater need to continuous uses of both first and second situation. In the fourth situation which is a copy of the third, the connection between the switches changes to DS3 because of exceedingly delicate to the continuous applications that require more data transfer capacity.
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