Gayan Abeysundara - Complex Adaptive Systems Group

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Dynamic Cellular Channel Allocation using Intelligent Agents April 2005COMP 4905 Honours Project25Centre Hotspot Model: Call Rate of 10Calls Blocked (%)201510500 1 5 10 15 20 25 30 35 40Number of AntsFIGURE 22. Simulation results of Centre Hotspot call model using call rate of 10.Like the Downtown model, the Centre Hotspot call model produced good results when agentswere added. Again the graph would level off and plateau after a certain number of ants. With thiscall model, all situations with one ant showed a lower number of call blocks than the agent-lesssystem. One other interesting discovery of this call model is how evenly uniform the graphs arewhen compared with the Downtown model. The trend lines are very level, with little fluctuations.This is most likely because there is less cycles than the Downtown model, and gave the agentsmore time to adapt and settle into the predictable pattern. Simulations with the Centre Hotspotmodel produced a remarkable 71% - 82% reduction in calls blocked using agents (in all callrates).Again the results using the Dynamic Ant Adjustment were excellent. The number of ants adaptedvery well to the different call rates. The feature even produced better results with lower call ratesthan any of the fixed ants. But this could be due the fact that the simulation were run for threetimes longer than with fixed parameters (12,000 compared with 4000 seconds). Using the featurecaused an average reduction of 76% in calls blocked.27
Dynamic Cellular Channel Allocation using Intelligent Agents April 2005COMP 4905 Honours Project4.1.3 Random Hotspot Call ModelCalls Blocked (%)14121086420Random Hotspot Model: Call Rate of 30 1 5 10 15 20 25 30 35 40Number of AntsFIGURE 23. Simulation results of Random Hotspot call model using call rate of 3.Calls Blocked (%)181614121086420Random Hotspot Model: Call Rate of 40 1 5 10 15 20 25 30 35 40Number of AntsFIGURE 24. Simulation results of Random Hotspot call model using call rate of 4.25Random Hotspot Model: Call Rate of 5Calls Blocked (%)201510500 1 5 10 15 20 25 30 35 40Number of AntsFIGURE 25. Simulation results of Random Hotspot call model using call rate of 5.28
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Gayan Abeysundara - Complex Adaptive Systems Group

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