Gayan Abeysundara - Complex Adaptive Systems Group

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Dynamic Cellular Channel Allocation using Intelligent Agents April 2005COMP 4905 Honours ProjectCalls Blocked (%)14121086420Dowtown Model: Call Rate of 80 1 5 10 15 20 25 30 35 40Number of AntsFIGURE 12. Simulation results of Downtown call model using call rate of 8.Calls Blocked (%)1614121086420Dowtown Model: Call Rate of 90 1 5 10 15 20 25 30 35 40Number of AntsFIGURE 13. Simulation results of Downtown call model using call rate of 9.Calls Blocked (%)1614121086420Dowtown Model: Call Rate of 100 1 5 10 15 20 25 30 35 40Number of AntsFIGURE 14. Simulation results of Downtown call model using call rate of 10.23
Dynamic Cellular Channel Allocation using Intelligent Agents April 2005COMP 4905 Honours ProjectThe agent-based solution using the Downtown call model produced excellent results. Each graphshows a very clear trend and correlation between the percentage of calls blocked and number ofants. As more ants were added to the system, the percentage of calls started to level off into aplateau. The only fluctuation seen was when one ant supported the network. And as the call rateincreased, the fluctuation grew larger. This is nothing to be concerned about since one ant is notconsidered a swarm and should not necessarily produce better results. In the situations were thelone ant produced worse results, the cause is not completely known. It could be possible that withsuch high call rates, the ant was shuffling channels in a way that caused more calls to be blocked.Considering the above call rates of three to ten, the agent-based solution reduced the number ofcalls blocked by 63% - 73%.Using the Dynamic Ant Adjustment feature also showed very good results. It surprisingly chosethe optimal number of ants that produced the lowest call blockage. And in the lower call rates, thedynamic number of ants produced very good results using fewer ants than the fixed method. Thenumber of calls blocked was reduced by an average of 67% using dynamic ants.4.1.2 Centre Hotspot Call ModelCalls Blocked (%)876543210Centre Hotspot Model: Call Rate of 30 1 5 10 15 20 25 30 35 40Number of AntsFIGURE 15. Simulation results of Centre Hotspot call model using call rate of 3.24
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Gayan Abeysundara - Complex Adaptive Systems Group

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