PERFORMANCE EXISTENCE OF WIFI AND WIMAX USED OPNET

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1 PERFORMANCE EXISTENCE OF WIFI AND WIMAX USED OPNET Mr. Nitish Meena 1, Dr. Nilesh parihar 2 1 Dept.Of ECE, Pratap University (MPGI) Jaipur, Rajasthan, (India) 2 Principal in Bhartiya Institute of Engineering & Technology Sikar, Rajasthan, (India) ABSTRACT IEEE e, mobile Wi-Max, is a wireless technology used to provide very large data rate over large areas to a large number of users (operates something) where broadband is unavailable (not able to be used or obtained). WiMAX network operators (switch bord exchange telephonic) provide WiMAX subscriber units that enable connection to the sophisticated WiMAX network while WiFi units are used for connecting local devices within homes or businesses. In this paper, we use OPNET Modeler to simulate and compare WiFi and WiMAX in a few area networks and compare their performance in terms of mobility (the abilty to move or be moved freely and easily). I. INTRODUCTION Wireless Local Area Network technologies include Wireless Fidelity and World Local Area Network (WiMAX). WiFi is based on the IEEE standard while WIMAX operates based on IEEE Both standards are designed for the Internet protocol applications. WiFi is optimized for a very large speed WLAN while WiMAX is intended for a high speed Wireless Wide Area Network (large area network). WiFi has an operating(control the functioning) range of a few hundred feet with speeds up to 55 Mbps while WiMAX may manage in the range of up to 48 miles with speeds of 80 Mbps and past. WiFi only covers small area networks like office and campus area whereas WiMax covers an entire city. In this paper, we describe a compaira performance analysis of WiFi and WiMAX technologies for a small area network. Two postulated sequence were designed to carry load and to compare the throughput. In Section, Both WiFi and WiMAX are described. A network way is given in Section Simulation results are discussed in this Section. II. WIRELESS (LAN) TECHNOLOGIES WLAN technologies have been widely used. They provide free wireless extent of the ability of networked computer to communicate together (Computing capacity for the interconnection of systems, and applications). To the end users, offering an easy and viable access to a network and its services. Wireless technologies, their standards, coverage area range, and service data rate are shown in Figure WiFi and WiMAX are used now instead of wired system to access Internet. WiFi network provides the Internet within homes or business for connecting local devices (wireless enabled devices). WiMAX subscriber unit are mainly used to connect the home users to the metropolitan WiMAX networks. WiFi usage by world region is described in Figure. Subscribers in Europe use WiFi more frequently than in other parts of the world having 95% of WiFi shares. 65 P a g e

2 2.1 WiFi WiFi is based on IEEE third modulation (exert a modifying or controlling influence on) (standard. It operates in 2.4 GHz frequency band and provides data transfer at maximum rate of 54 Mbps. The orthogonal frequency division modulation (exert a modifying or controlling influence on) scheme is used at data rates of 6, 9, 12, and 54 Mbps. It reverts to complementary code keying for 5.5 Mbps and 11 Mbps and direct-sequence spread spectrum for 1 Mbps and 2 Mbps [4]. Millions of users rely on WiFi connections for their, mobile phones, and consumer electronics devices. The access to WiFi is made easy by integration of WiFi into electronic devices. Smart phones and over 98% of laptops are WiFi integrated. WiFi has two types of components: a wireless client station and an access point, as shown in Figure. Wireless client station is any user device such as computer or laptop that has a wireless network card. AP acts as a bridge between fixed and wireless networks. It connects to the cable modem or Digital Subscriber Line modem, provides Internet services to wireless or Ethernet clients, and organizes and grants access from multiple wireless stations to the fixed network. Users can now connect smart phones to the wireless router for WiFi services to access the Internet over mobile phone. Figure -: Wifi Client/Station Connection 2.2 WiMAX WiMAX a supports fixed and mobile Internet access. It can be connected with an Internet Protocol based core network, which is chosen by operators that serve as Internet Service Providers e uses Scalable Orthogonal Frequency-Division Multiple Access rather than Orthogonal Frequency-Division Multiplexin. It employs two multiple duplexing schemes: Time Division Duplexing and Frequency Division Duplexing. WiMAX base station uses T1 (1.545Mbps), which may provide bandwidth to hundreds of Internet Subscribers with frequency band frame 10 GHz to 66 GHz [7]. Medium access control layer of WiMAX employs a scheduling algorithm for the initial entry of the subscriber station into the network. The base station then allocates (distribute, resources or duties, for a particular purpose) an access slot to SS and other subscribers may not use the same slot. The scheduling algorithm is used for controlling the bandwidth efficiency and quality of service (QoS) parameters by changing the time slot duration. WiMAX is an all-internet protocol foundation that 66 P a g e

3 uses the point to multipoint topology to communicate with the subscribers whereas base stations communicate to each other using point-to-point topology. The throughput of the WiMAX lies between the WiFi (the ability to move or be moved freely and easily) mobility. Cell radius of the base stations is 6.2 miles with service data rate of 50 Mbps. WiMAX can reach more endorse and can deliver non line of sight services. WiMAX connections may be fixed or mobile. WiMAX connection set up is shown in the Figure. WiMAX provides wide range of applications such as voice over Internet Protocol (the accepted or established code of procedure or manner of acting in any group, organization, or situation), Internet Protocol mobile data TV, mobile emergency response services, and wireless backhaul as substitute for fiber optic cable. The privacy and key management protocol version 2.2 is used in WiMAX for securely exchange keying material between the Base Station and Mobile Station. Figure:- Figure: - Wifi and Wimax Client/Station Connections to the Internet 2.3. Comparison between WiFi and WiMAX WiFi provides an LAN connection within the range of an AP. WiFi may be used to create a mesh network and provide end to end connections between users. To the contrary, WiMAX provides higher bandwidth and larger coverage range to provide high-speed mobile data and telecommunication services such as 4G. WiMAX may be used also to connect WiFi spot of light. medium access control layer in WiFi employs contention access if users wish to send data through AP and compete with each other to seek AP s attenstion. 67 P a g e

4 Comparison of WiFi & WiMAX is shown in Table:- III OPNET MODELER OPNET is a research oriented network simulation tool. It provides a comprehensive (of large content or scope; wide-ranging) development environment for forming and act of pretending of deployed wired and wireless networks. OPNET Modeler (typically on a smaller scale than the original) enables users to create customized models and to simulate various network scenarios. The wireless module is used to create models for wireless scenarios such as WiFi and WiMAX. The Modeler is object-oriented and employs a arranged according to rank approach to model communication networks. It provides graphical user interface (Computing a device or program enabling a user to communicate with a computer). the specifications of spread out networks, and protocols. A are Project, Node We used OPNET Modeler 15.0 to simulate WiFi and WiMAX. OPNET provides high-fidelity modeling, simulation, and analysis of wireless networks such as interference, transmitter/receiver characteristics, and full protocol stack, including Medium access control, routing, higher layer protocols, and applications. It also has the ability to incorporate node mobility and interconnect wire line transport networks. 3.1 Model Depiction We created three OPNET models for WiFi and WiMAX mobile and fixed local area networks to estimate value their performance. OPNET models developed for WiFi fixed and mobile stations in a small-scale network of 5 km 5 km= 25 km are shown in Figures, respectively. WiMAX mobile stations are shown in Figure. The first WiFi scenario consists of eight not moving workstations (node_0 to node_7). In the second scenario, eight WiFi mobile stations are randomly located (mobile_node_0 to mobile_node_7). AP is connected to the switch and to server by a link. Server is configured for four network applications: Hypertext Transfer Protocol heavy, video conferencing, voice, and file transfer heavy. Application definition is set up for 68 P a g e

5 the same applications as for the server. In the second synopsis of a plot, the MS s are randomly moving. WiMAX scenario has one Base stastion and eight MS s that randomly move over defined trajectories that are identical to course in WiFi synopsis of a plot. Act of conducting a telecommunication technology that allows two or more locations to concurrently act reciprocally via two-way video and audio transmissions. HTTP is the foundation of data communication for the World Wide Web. The development of HTTP standards has been coordinated by the Internet Engineering Task Force. File Transfer Protocol is designed for transferring files and offers faster overall throughput and better error checking. These applications are select because they carry most of the load over the Internet Parameters Figure: - Wifi Scenario with Randomly Located Mobile Stations. 69 P a g e

6 Table: Base station WiMAX parameters IV OPNET SIMULATION RESULTS An four Applications are used in three scenarios to comparethe network load & queuing delay. HTTP traffic sentand received is shown in Figures. respectively. The traffic sent by both mobile fixed WiFi is identical to the traffic received, A implies no loss.there is also no loss in case of mobile wifi traffic sent and received. No loss occurring due to handoff because thewifi network has only one AP and the WiMAX a network has only one BS in each simulation scenario. 70 P a g e

7 Figure: FTP Traffic Sent By the Server Figure: FTP Traffic Received By the Server Figure:-Mean Opinion Score (MOS) Value Average traffic in packets through the network by the File Transfer Protocol server is shown in Figure file transfer protocol traffic received by the server is shown in Figure. As forward to, fixed WiFi has the something which is least amount of traffic sent compared to mobile WiFi. Mobile WiMAX has the highest average amount of traffic sent, almost seven times the traffic sent over the WiFi network. Since WiFi does not provide the broadband Internet services, WiMAX provides broadband service to carry additional load. Voice and video applications show similar results. Voice mean opinion score is shown in Figure A MOS provides a numerical measurement of quality of voice signal transmitted. Mobile WiFi has higher Mean Opinion Score value than mobile WiMAX. 71 P a g e

8 4.1. Throughput The average and overlaid peer to peer throughput of the inward link to the server and external link from the server are shown in Figures and respectively. Point-to-point throughputs for fixed and mobile WiFi are as predicted. WiFi with moving stations has good throughput than fixed WiFi, which is due to the stations moving closer to the AP. WiMAX has higher throughput likened with WiFi synopsis of a plot. The throughput of inward link to the server is much smaller likened with the outward link from the server, as seen in Figure. In WiFi mobile and WiMAX scenarios, the throughput of the WiMAX network link that carries load from the server has higher end-to-end throughput. WiMAX has better throughput because it is based on a broadband service. Figure Throughput of the inward link to the server. Figure: Throughput of the external link from the server. Figure:-Throughput of the Inward Link to the Server Figure:-Throughput of the Outward Link from the Server 72 P a g e

9 The load that AP carries in each network is shown in Figure.WiFi carries 25,000 bits over the network while WiMAX can carry 48,000 bits. The average queuing delay of the server to switch link in WiFi and the Internet protocol cloud to server link in WiMAX is shown in Figure.It represents the instantaneous measurement of packet waiting times in the queue of the transmitter channel. The measurements of the average queuing delay are taken from the moment when a packet arrives into the queue until the time when the last bit of the packet is transmitted. As expected, this queuing delay for mobile WiMAX in a small area network is smaller compared to fixed and mobile WiFi. The average queuing delay of switch to server link in WiFi and Internet protocol cloud to server link in WiMAX is shown in Figure.In WiMAX scenario, the queuing delay of this link starts to decrease as the load starts to increase. Shown in Figure. In WiMAX scenario, the queuing delay of this link starts to decrease as the load starts to increase. Figure:-Load Of BS and Access Point Figure:-Average queuing delay of the server to switch link in WiFi and the IP cloud to server link in WiMAX Figure:-Average Queuing Delay of the Switch to Server Link in Wifi and the IP Cloud to Server Link in Wimax 73 P a g e

10 V. CONCLUSIONS In this paper, we simulated two WiFi and one WiMAX scenarios and compared their throughput and load. WiMAX throughput is higher in case of heavier traffic and wide area range. WiMAX may handle heavier load compared to WiFi. The simulation results show that the WiMAX queuing delay is smaller because WiMAX provides broadband service to carry clumsily traffic load over the network. Queuing delays for both WiFi synopsis of a plot are identical. We considered various parameters such as delay, load, and throughput of base station, router, and subscriber station and analyzed their effect on the performance of WiMAX in a local area network. The base station or those router holds up in WiFi were compared and, as expected, the delay in WiFi router was higher than the delay in the base station. WiMAX is more efficient for act of paying off more data with less queuing delay when compared to WiFi. REFERENCES [1] [2] WiMAX (802.16) specialized model, OPNET [Online]. Available: [3] OPNET Modeler [Online]. Available: [4] OPNET product documentation v.11.0.a, OPNET Technologies, Inc., Bethesda, MD, [5] model_library/wlan80211.html. [6] [7] G. Niestegge, The leaky bucket policing method is asynchronous transfer mode networks, International Journal of Digital and Analog Communication Systems vol-03. [8] ANSI X : Fiber Distributed Data Interface (FDDI) - Token Ring Media Access Control (MAC) [9] Malathi veeraraghavan, Xuan Zheng, 2005 reconfigurable Ethernet/SONET circuit based Metro Network Architecture, IEEE Journal on selected areas in communication Vol. 22 No. 8. [10] S.R.Kodituwaku, etal. Compression of lossless Data Compression algorithms for text data, Indian Journal of Computer Science & Engineering, ISSN: Vol. 1. [11] M. Zima, M. Larsson, P. Korba, C. Rehtanz, G. Anderson, Design Aspects for Wide Area Monitoing and Control IEEE Proceedings, Oct [12] M. Chenine, L. Nordstrom, Modeling and Simulation of Wide Area Communication for Centralized PMU based Applications, IEEE Trans. On Power Delivery, Vol. 26, July [13] IEEE Standard for Synchrophasor Data Transfer for Power Systems, IEEE [14] OPNET Technologies, Inc. [15] US-Canada Power System Outage Task Force, Final Report on the, 2003 blackout in the United States and Canada. [16] K. Tomsovic, D.E.Bakken, V. Venkata subramanian, A. Bose, Designing the Next Generation of Real Time Control, Communication, and Computations for a large Power Systems, IEEE Proceedings, Special Issue on Energy Infrastructure Systems, Vol. 93, may P a g e

11 [17] Y. Deng, H. Lin, A.G. Phadke, S. Shukla, J.S. Thorp, L Mili, Communication Network Modeling and Simulation for Wide Area Measurement Applications IEEE International Conference on Smart Grid Communications, [18] T. E. Dy-Liacco, Control centers are stay, IEEE Comput. App. Power, vol. 15, AUTHOR INTRODUCTION:- Prof. Nitish Meena have been done his Graduation in B.TECH from Rajasthan techanical university, Kota (RTU).which is Affiliated from AICTE,New Delhi & post Graduation in M.TECH from (S.U), Rajasthan, Affilited From AICTE& U.G.C After that he is pursuing of Doctrate (Ph.D) Department of Eletronics & Communcation. In Pratap University,jaipur (Rajasthan). He have three year teaching Experience in his field & recently Works as a vice-principal in SIET Engineering college, Lalsot (jaipur) And continuously researching in his field. AUTHOR INTRODUCTION:- Dr. Nilesh Parihar had been done his Graduation in B.TECH from Bangalor techanical university,(tumkur).which is & post Graduation in M.TECH from M.B.M Engineering college, J.N.V University, Jodhpur Rajasthan, Affilited From AICTE. After that he is Doctrate (Ph.D) Department of Eletronics & Communcation. In Jodhpur National University, Jodhpur (Rajasthan). He have Fifteen year teaching Experience in his field & recently Works as a principal in Bhartiya Institute of Engineering & Technology, sikar (Rajasthan) And continuously researching in his field. 75 P a g e