2×2 Switch Simulation in Matlaab

22 Packet Switch manakin Using Matlab Interim Report debate, output-buffer, queuing process, analytical abstract, semblance Student Name Deniz Ozdemir Email emailprotected qmul. ac. u Supervisor Dr earth-closet Schormans Deniz Ozdemir ec09502 Interim name Contents Page 1. 1 Aim 1. 2 Methodology 1. 3 Objectives 2. Background 2. 1 carrying out Evaluation 2. 1. 1 measure 2. 1. 2 Analysis/ semblance 2. 2 Packet Switched engagements 3. insertion 4. guess 4. 1 Queuing Theory 4. 1. 1 Queuing type 4. 1. 1. 1 conceit of a queuing model 4. . 2 Queuing theory notation 4. 1. 3 The M/M/1 Queue 4. 1. 4 The M/D/1 Queue 4. 2 Switching 4. 2. 1 Switching Concept 4. 2. 1. 1 Internal Link Blocking 4. 2. 1. 2 Output Port Contention 4. 2. 1. 3 Head Of Line Blocking 4. 2. 2 Time among Arrivals 4. 2. 3 Counting Arrivals 4. 2. 4 The Queuing Behaviour Of Packets In Output Buffers 4. 2. 4. 1 Calculating The State Probability Distri merelyion 5. analytic / simulation Results 5. 1 22 Switch 5. 1. 1 Analytical Results 5. 1. 2 Simulation Results 5. 2 44 Switch 5. 2. 1 Analytical Results 5. 2. Simulation Results 5. 3 88 Switch 5. 3. 1 Analytical Results 5. 3. 2 Simulation Results 5. 4 1616 Switch 5. 4. 1 Analytical Results 5. 4. 2 Simulation Results 6. Conclusion 7. Project Management 7. 1 put on the line Analysis 7. 2 Gant Chart 8. References 9. Appendix 2 2 2 2 2 2 2 3 3 3 3 3 4 5 5 7 9 9 9 9 11 11 13 14 14 15 15 15 17 19 19 20 22 22 23 25 25 26 28 28 28 28 28 29 1 Deniz Ozdemir ec09502 Interim report 22 Packet Switch Simulation Using Matlab 1. Aim Build a simple 22 packet switch simulation using Matlab and study its performance 1. 2 Methodology ?Test out simulation on fundamental 22 switch element. ? Then expand it. 1. 3 Objectives ? Learn most Matlab. ? Learn about simulation. ? Build simple test model and stress it. ? Build 22 element in Matlab. ? Simulate results. ? do work results. ? Simulate any new results required. ? Write report. 2. Background 2. 1 Performance Eva luation When networks are designed, the goal of the performance evaluation is that to determine the beaver effect of the equipment sed. Methods for performance evaluation are step techniques , analysis and simulation. 3 2. 1. Measurement For measurement methods real networks are used for experimentation. The advantage of direct measurement of network performance is that no detail of network operation is excluded but experience hard to test performance limits. Customers wont equivalent it when you crash the system. 3 2. 1. 2 Analysis/ Simulation In comparing analysis and simulation, the main factors to consider are the accuracy of results, the time to produce results, and the general cost of using the method. Advantage of analytical solutions is that they are quite near fit to reality and produces results quickly.However assumptions required to define equations and parameters and they can be very complex. Simulation provides system representation to required precision. However s imulation can be time and cost demanding. 3 2 Deniz Ozdemir ec09502 Interim report 2. 2 Packet Switched Networks In a packet switched network wholly nodes interconnected by directed links. Packets are routed independently. Packets enter the network at a specific node where they may be queued in a buffer to wait for an outgoing channel to become free.This continued in a hop by hop manner until the packets finally bring forth at their destination. Packets may get to the same destination by victorious different routes. That increases efficiency of transmission resources. Also queued packets in the buffer leave cause a variable delay and throughput, depending on traffic load. staple fibre network is shown in figure 1. 1 Figure 1 Packet Switched Network 3. Introduction Contention in a switch affects the performance of a switch. To prevent this some switching techniques are developed. One of the most leafy vegetable switching techniques is the one with output-buffered switch.In thi s report, queuing process of performance evaluation, for such a switch is make analytically first than simulation analysis is done using Matlab. In the end of the report comparison of two results is done. 4. Theory 4. 1 Queuing Theory Analysis of the queuing process is basic and essential develop of the performance evaluation. Because queues are form in a network when there is a high demand on limited resources. 4. 1. 1 Queuing Model Packets arrive at a queuing system to be served for a current time. If service is not immediately available they wait for service in a storage area (buffer).After a certain length of time, they are served and leave the system. raw material queuing system is shown in figure 2. 3 Deniz Ozdemir ec09502 Interim report Figure 2 Schematic diagram for a single server queuing system 3 Also basic queuing relationship is shown in table below General q=?. W=?. = + Table 1 Basic queuing relationship Single Server ? =?. q=W+? 4. 1. 1. 1 Concept Of A Queuing Mo del Let N (t) be the number of packets waiting in the queue plus the one who is being served (1,2,3). A series of packets arrive at instants T1