Hi all, I've been doing research on large mobile ad hoc network simulation, so far using Two-Ray Ground radio wave propagation model. I suppose I was achieving a reasonable amount of time to fully complete a simulation run with 10k nodes with 3k connections between them during 300 seconds of simulation time (about 2 days and a half).
Now I've switched to the FreeSpace propagation model and I've noticed that the time to process the simulation largely increased. Let me show some small scale network examples: 1) Simulating 10 nodes, 3 connections between them, 300s simulation time: FreeSpace..............1m3.232s TwoRayGround........0m0.500s 2) Simulating 100 nodes, 30 connections between them, 300s simulation time: FreeSpace..............more than 30 minutes TwoRayGround........1m11.207s I've also made some simulations using the Shadowing model and the time spent was very close to the ones obtained when using the TwoRayGround model. I am really surprised with the high time consumption of the simulation run using FreeSpace model as it is a much less complex model than TwoRayGround and Shadowing. Does anyone have any clue about the reason why this is happening? Yes, I've read the FAQ, ns-problems page, and manual and I couldn't find the answer there neither in any other document or website. Please, ask me if more information about how the simulation is configured is needed. Thanks in advance. Ricardo J. Ulisses Filho ================================================= Departamento de Sistemas e Computacão - DSC Universidade de Pernambuco - UPE Recife - Pernambuco - Brazil [EMAIL PROTECTED] [EMAIL PROTECTED]
