WiMAX (World Wide Interoperability forMicrowave Access) is a standard based technology based on IEEE 802.16 Air Interface. This standard is the future mode of mobile communication. Therefore, it is important to evaluate the performance of WiMAX in different scenarios. In this paper we have presented performance analysis of WiMAX for the CBR (Constant Bit Rate) traffic with and without mobility. Two mobility models -flag mobility and random mobility models are considered for the performance evaluation. In the work three scenarios -one for fixed network and two for mobility models are generated using Qualnet simulator. We present the Results of this simulation in form of received throughput, end-to-end delay, jitter, and total sent and received packets. A comparative analysis of performance of all three scenarios has also been presented.
Seamless handover in wireless networks is to guarantee both service continuity and service quality. In WiMAX, providing scalability and quality of service for multimedia services during handover is a main challenge because of high latency and packet loss. In this paper, we created four scenarios using Qualnet 5.2 Network Simulator to analyze the hard handover functionality of WiMAX under different conditions. The scenarios such as Flag with 5 and 10 sec UCD and DCD interval values, Random mobility scenario and DEM scenario using 6 WiMAX Cells have been considered. This study is performed over the real urban area of JNU where we have used JNU map for scenarios 1, 2 and 3 but for scenario 4, the JNU terrain data has been used. Further, each BS of 6 WiMAX cell is connected to four nodes. All nodes of each scenario are fixed except Node 1. Node 1 is moving and performing the handover between the different BSs while sending and receiving real time traffics. Flag mobility model is used in Scenario 1, 2 and 4 to model the movement of the Node 1 while we use random mobility model in sceanrio3. 5 seconds time interval is used for Scenarios 1, 3, and 4 while 10 seconds time interval is used for scenario 2 to study the effect of management messages load on handover. Further, the statistical measures of handover performance of WiMAX in terms of number of handover performed, throughput, end-to-end delay, jitter, and packets dropped are observed and evaluated.
Social needs and demand changes fuel the technology to rise and meet those needs. Nowadays, users of wireless network communications tend to use their small size, limited powered mobile devices to access multimedia services with good quality of service anytime, anywhere. This implies more power consumption and raises the need for energy efficiency in doing more work with less power consumption. WiMAX (World Wide Interoperability for Microwave Access) supports battery-operated terminals and allow them to operate longer. It defines power-saving features and signaling methods, helpingmobile terminal toshift to idle or sleep mode when it is not transmitting or receiving.In this paper, WiMAX Network performance for CBR traffic in three different Mobility models and four different Energy Models have been analyzed. The simulations are carried out using Qualnet simulator. Results are in the form of throughput, Delay, Jitter, energy consumption in transmitting, receiving, sleep and idle mode. Further, to observe the best network performance in terms of Mobility models as well as the efficient energy model for each mobility models, the comparative analysis of different performance metrics has been evaluated. Depending on the results we get from this study we can say that energy model does not affect the performance of the network in case of flag and random mobility models, while it shows a little effect on network performance in case of using group mobility. For group mobility Mica Motes gives the best performance.
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