Throughput Performance Analysis For VOIP Over UMTS Networks

International Journal of Engineering Sciences Paradigms and Researches (IJESPR)(Vol. 30, Issue 01) and (Publishing Month: May 2016)(An Indexed, Referred and Impact Factor Journal)ISSN: 2319-6564www.ijesonline.comThroughput Performance Analysis for VOIP over UMTSNetworksAtyaf Mohamed Abdalwahad Mohamed1, Dr. Khalid Hamid Bilal2 and Dr. Mustafa Mohamed alhassan31Department of Communication, Faculty of Engineering, Al-Neelain University, Khartoum, Sudan2University of Science and Technology, Khartoum, Sudan3Department of Communication, Faculty of Engineering, Al-Neelain University, Khartoum, SudanPublishing Date: May 31, 2016the different types of services as per user contentment. Voiceand video conferencing have a great deal of demand over thecellular network. Cellular networks are also emerging with animproved level of Quality of Service (QoS) and bettermobility and improvement in voice and video transmissionover different technologies .To obtain better performance tosatisfy the users, proper adaptation and improve the quality ofservice (QoS) is required [1].The Universal Mobile Telecommunications System (UMTS)is an umbrella term that encompasses the third generation (3G)radio technologies developed and maintained by the 3GPP(3rd Generation Partnership Project). UMTS is a networkstandard used throughout much of the world as an upgrade toexisting GSM mobile networks. The technology described inUMTS is sometimes referred to as Freedom of MobileMultimedia Access (FOMA) [3] [4] or cations Union IMT-2000 standard set andcompares with the CDMA2000 standard set for networksbased on the competing CdmaOne technology. UMTS useswideband code division multiple access (W-CDMA) radioaccess technology to offer greater spectral efficiency andbandwidth to mobile network operators. [2], a technology thatshares much with CDMA networks used throughout the world,though it is not compatible with them. [5]AbstractNow days 3G/UMTS Network had been the challenge in the Networkenvironment. The goal of the project is to study the cellular system ofmobile the third generation network UMTS and what the applicationand services that the UMTS network offers. What is the requirementsfor VoIP to be implemented on the UMTS, and the operation of VoIPin the UMTS Network. The experiment had been carried out usingOP-NET software based on throughput and mean opinion score(MOS) parameters. We studied and discussed the throughput andmean opinion score performance for VoIP in UMTS network indifferent scenarios, and then compare and analyzing the results toevaluate the performance of VoIP. The results show that the properadaptation of QoS provides the best performance.Keywords: VoIP, OPNET, UMTS, Throughput, MOS.1. IntroductionTelecommunication had been the researchers discuss andmake a numerous changes in the recent years, especially in thedevelopment of mobile broadband. Nowadays communicationis going to be popular due to wireless communication; cellulartechnology is going to be emerged rapidly. Based on thedemand of the users, next generation cellular system is beingable to provide a collection of applications for users. TheUniversal Mobile Telecommunication (UMTS) System is oneof the features of cellular communication that is able to offerIJESPRwww.ijesonline.com67

International Journal of Engineering Sciences Paradigms and Researches (IJESPR)(Vol. 30, Issue 01) and (Publishing Month: May 2016)(An Indexed, Referred and Impact Factor Journal)ISSN: 2319-6564www.ijesonline.com1.1 Architecture of the UMTS NetworkFigure1: UMTS Network Architecture [6]The Universal Mobile Telecommunications System representsa complete system, which includes:User equipment (UE): It is a terminal, which help a user toaccess the network. Also it involves mobile equipment anduniversal service identification module (USIM). Terminalequipment must have an application programming interface(API). USIM provides personal mobility.Gateway MSC (GMSC):networks. [8]UTRAN(UMTS Terrestrial Radio Access Network): Whichincludes one or more of the RNS. Each RNS involves a radionetwork controller (RNC) and one or more Node (B).Radio network controller (RNC): RNC is responsiblefor managing radio resources of a set of cells. It is equivalentof BSC networks GSM / GPRS, but more independent.Node B: Provides transmission and reception ofsignals in one or more cells in the network. It is alsoresponsible for monitoring the power level of the cells.[7] It is the interface to the externalPacket switched: These are designed to carry packet data,which enables much higher network usage as the capacity canbe shared and data is carried as packets which are routedaccording to their destination. It includes the following: Core Network: (Mobile Application Part) :The 3G/ UMTScore network architecture is a migration of that used for GSMwith further elements , whowever to enable the additionalfunctionality demanded by users . UMTS core network is splitinto two parts:Circuit switched elements: These are primarily based on theGSM network entities and carry data in a circuit switchedmanner, which include the following:Serving GPRS Support Node (SGSN): It is a packetswitch and router in the domain of PS core network. Alsoit controls the access between a mobile station and thenetwork and routes packets to the correct BSC / RNC.And it serves as the mobility management, such asregistering the location of the adjustment region routingand paging. SGSN also carry out the functions of privacysuch as authentication and encryption.Gateway GPRS Support Node (GGSN): It is act as apacket router in the domain , and it is the gatewaybetween routing IP packets to the mobile network UMTSand IP packet routing in fixed networks of the Internet.Also it is storage user’s data for active UE , andimplement the functions of privacy such as firewalls andfiltering. [7]Voice over IP (VoIP) is a group of technologies for thedelivery of voice communications and multimedia overInternet Protocol (IP) networks. Other terms commonlyassociated with VoIP are IP telephony, Internet telephony,broadband telephony, and broadband phone service. MobileMobile switching center (MSC): It is basically the same asthat in GSM, and it manages the circuit switched calls.IJESPRwww.ijesonline.com68

International Journal of Engineering Sciences Paradigms and Researches (IJESPR)(Vol. 30, Issue 01) and (Publishing Month: May 2016)(An Indexed, Referred and Impact Factor Journal)ISSN: 2319-6564www.ijesonline.comVoIP works with a cell phone’s or other Internet service issend voice calls as digital signals over the Internet using voiceover IP technology. Digital data transmission using VoIP isalso typically faster, as the data is spread out over multiplepackets; each of them is taking the fastest route to its intendeddestination.The purpose of this thesis is to study the UMTS Networkfeatures and services, however to evaluate the QoSperformance of the 3G/UMTS network based on theperformance metrics of Throughput and mean opinionscore(MOS) .Throughput: is known as the rate packets that weresuccessfully delivered through the channel communication tothe destination, it is usually measured in bits per second (bit/sor bps).Mean Opinion Score (MOS) : is attesting that provides anumerical index to illustrate the quality of service in the phonenetworks observed by users or destinations reception.Table 1: The classification of the dPerceptible3Fairlightly annoying2PoorAnnoying1Badextremely annoying2. Methodologythroughput total traffictime (sec ) .(1)To evaluate the performance of VoIP application in the UMTSnetwork in the packet switched part of the network bymonitoring the VoIP Traffic across the network we have usedOPNET Modeler, in our simulation; and designed differentscenarios for conference and measure the performance ofthroughput ratio according to the Codec's. G729A and GSMCodec, as well as meet the goal to analysis the quality in3G/UMTS wireless networks. To evaluate the results forsuccessful transmission, and comparing the VoIP performancefor different number of nodes in the network, this can be doneby capturing the packet sent and packet received of VoIPTraffic and calculating the value of throughput for the VoIPtraffic.Mathematical equation of mean opinion score (MOS):3. Mathematical ModelId: impairment delays particularly mouth-to-ear delay.Mathematical equation of throughput ratio is given by:R: mean opinion score factor.The MOS is calculated using a non-linear mapped R factor:MOS 1 0.035R 7 10 6 [R R 60 100 R]. . 2Where:MOS is the mean opinion scoreR 100 – Is – Ie – Id AIs: voice signal impairment effects.Ie: impairment losses suffered due to the network and codec’s.IJESPRwww.ijesonline.com69

International Journal of Engineering Sciences Paradigms and Researches (IJESPR)(Vol. 30, Issue 01) and (Publishing Month: May 2016)(An Indexed, Referred and Impact Factor Journal)ISSN: 2319-6564www.ijesonline.comComputer Model:beginSetVoice code type pcmVoip quality pcmFrame size 10msecCoding rate 64kbpsDsp processing ratio 1.0Define Qosprofile for senderConnecting to SIP serverYesNoIs callintiatedbetween2 nodesBegin voip packets transport Record call timeCalculate traffic sent & trafficreceived for sending & receivingterminalSet Throughput 𝒕𝒐𝒕𝒂𝒍 𝒕𝒓𝒂𝒇𝒇𝒊𝒄𝐭 𝒊𝒎𝒆 (𝐬𝐞𝐜)Mos 1 0.3R 7*𝟏𝟎 𝟔 (R*(R60)(100R)Calculate throughput &MosendIJESPRwww.ijesonline.com70

International Journal of Engineering Sciences Paradigms and Researches (IJESPR)(Vol. 30, Issue 01) and (Publishing Month: May 2016)(An Indexed, Referred and Impact Factor Journal)ISSN: 2319-6564www.ijesonline.com4. Simulation EnvironmentThe simulation of VoIP application over the UMTS Network with the OPNET Software was completed under the following UMTSNetwork parameters.Table 2: Simulation ParametersVoice codec typePCMNameG.711Frame size(sec)10msecLock ahead size(sec)0 secDSP Processing ratio1.0Coding rate (bits/sec)64 kbpsSpeech activity detectionDisabledVoice over IP CallPCM QualityStart time offset (seconds)Constant (0)Duration (seconds)End of simulationUMTS PDCP CompressionDisabledUMTS RLC Processing time0.0015UMTS CPICH transmission power1.0Path loss ModelOutdoor to indoor environmentUMTS Node-b IDAuto assigned5 . SimulationAfter setting the simulation parameters for the UMTS network with VoIP Application , the screenshots from the OPNET softwareshows UMTS Network scenario with different number of nodes ,and configurationFigure 2 : Network Scenario with two NodesIJESPRwww.ijesonline.com71

International Journal of Engineering Sciences Paradigms and Researches (IJESPR)(Vol. 30, Issue 01) and (Publishing Month: May 2016)(An Indexed, Referred and Impact Factor Journal)ISSN: 2319-6564www.ijesonline.comFigure 3: Network Scenario with 4 NodesFigure 4: Network Scenario with 20 Nodes6. ResultsThe simulation was completed with the OPNET Software and the following results was extracted from the software for threescenarios. Results for 2 NodesTable 3: Results for 2 NodesSimulation 020.976949049IJESPRwww.ijesonline.com72

International Journal of Engineering Sciences Paradigms and Researches (IJESPR)(Vol. 30, Issue 01) and (Publishing Month: May 2016)(An Indexed, Referred and Impact Factor Journal)ISSN: 2319-6564www.ijesonline.comMean Opinion Score Vs Simulation T ime For 2 600Simulation TimeFigure 5: Simulation Time vs MOS for 2 NodesSimulation Time VS Throughput For 2 00Simulation timeFigure 6: Simulation Time vs Throughput for 2 NodesResults For 4 NodesSimulation TimeTable 4: Results for 4 sonline.com73