2×2 Switch Simulation in Matlaab

2&2152 Packet pitch seeming Using Matlab Interim decl atomic number 18 affray, output-buffer, queuing cultivate, analytical abstract, mannikin Student mention Deniz Ozdemir Email email&160protected qmul. ac. u supervisor Dr John Schormans Deniz Ozdemir ec09502 Interim hatch content Page 1. 1 Aim 1. 2 methodology 1. 3 Objectives 2. primer 2. 1 Performance Evaluation 2. 1. 1 measuring 2. 1. 2 analytic thinking/ pretense 2. 2 Packet bemuseed Ne bothrks 3. Introduction 4. Theory 4. 1 Queuing Theory 4. 1. 1 Queuing Model 4. 1. 1. 1 Concept of a queuing model 4. . 2 Queuing theory notation 4. 1. 3 The M/M/1 aline 4. 1. 4 The M/D/1 Queue 4. 2 merchandise over 4. 2. 1 deepening Concept 4. 2. 1. 1 Internal intimacy Blocking 4. 2. 1. 2 Output bearing Contention 4. 2. 1. 3 Head Of gillyflower Blocking 4. 2. 2 Time among Arrivals 4. 2. 3 Counting Arrivals 4. 2. 4 The Queuing doings Of Packets In Output Buffers 4. 2. 4. 1 calculating The State Probability Distribution 5. analytic / computer computer simulation Results 5. 1 2&2152 strike 5. 1. 1 Analytical Results 5. 1. 2 Simulation Results 5. 2 4&2154 Switch 5. 2. 1 Analytical Results 5. 2. Simulation Results 5. 3 8&2158 Switch 5. 3. 1 Analytical Results 5. 3. 2 Simulation Results 5. 4 16&21516 Switch 5. 4. 1 Analytical Results 5. 4. 2 Simulation Results 6. Conclusion 7. Project Management 7. 1 Risk analytic thinking 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 embrace 2&2152 Packet Switch Simulation Using Matlab 1. Aim relieve one(a)self a simple 2&2152 parcel of land stir simulation use Matlab and study its writ of execution 1. 2 Methodology ?Test out simulation on fundamental 2&2152 switch sh ar. ? Then expand it. 1. 3 Objectives ? memorise about Matlab. ? Learn about simulation. ? pretend simple test model and testify it. ? Build 2&2152 ele ment in Matlab. ? mock up results. ? Process results. ? Simulate any new results required. ? Write report. 2. Background 2. 1 Performance Evaluation When meshs argon designed, the goal of the performance paygrade is that to get hold the best effect of the equipment sed. Methods for performance evaluation are measurement techniques , analysis and simulation. 3 2. 1. measuring rod For measurement methods real interlocks are utilize for experimentation. The advantage of direct measurement of web performance is that no detail of engagement operation is excluded but experience rough to test performance limits. Customers wont like it when you crash the dodge. 3 2. 1. 2 Analysis/ Simulation In comparing analysis and simulation, the main factors to consider are the verity of results, the time to produce results, and the overall follow of using the method. Advantage of analytical solutions is that they are quite good fit to public and produces results quickly.However assumption s required to define equations and parameters and they canful be very complex. Simulation provides arranging representation to required precision. However simulation can be time and equal demanding. 3 2 Deniz Ozdemir ec09502 Interim report 2. 2 Packet Switched Networks In a packet switched network all lymph 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 enthrall to become free.This continued in a hop by hop mood until the packets finally number at their destination. Packets may arrive the same destination by taking different routes. That increases efficiency of transmission system resources. Also queued packets in the buffer pass on cause a variable storage area and throughput, depending on traffic load. Basic 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 turn techniques are developed. One of the most ordinary switching techniques is the one with output-buffered switch.In this report, queuing process of performance evaluation, for such a switch is done 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 pause of the performance evaluation. Because queues are form in a network when there is a high demand on modified resources. 4. 1. 1 Queuing Model Packets arrive at a queuing system to be served for a certain time. If service is not at once available they wait for service in a storage area (buffer). aft(prenominal) a certain length of time, they are served and leave the system. Basic queuing system is shown in figure 2. 3 Deniz Ozdemir ec09502 Interim report Figure 2 Schematic plot for a single server queuing system 3 Also basic queuing kin 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 Model permit N (t) be the number of packets delay in the queue plus the one who is being served (1,2,3). A series of packets arrive at instants T1