On 2020/03/17 0:42, Johannes Berg wrote: > I don't see this - the signal strength is just taken as is, and > overwritten, so there's no accumulation going on? Right. The signal strength is not accumulated. The commit log is wrong. The interference model is accumulating frame duration to calculate probabilities. About accumulation of signal strength, it could be calculated as vector. I wrote about it in response to realistic simulation. I think I should explain the concept of this interference model. The interference model assumes signals which strength is under CCA threshold are interference signal. The model accumulates the duration of such signals. The model assumes (accumulated duration / time slot) is probability of occurrence of interference. When interference occurs, the model reduce the max signal strength of interfering STA from transmitting STA's signal strength. Though the implementation is not among the concept of the model. The signal strength from node A to B was calculated and wrongly accumulated to interference duration of "A to all". I fixed it to "A to B" and sent a Pull Request to wmediumd. https://github.com/bcopeland/wmediumd/pull/22 > I guess my question really is how what's actually implemented is meant > to map to the physical world? To get closer to real world, it is necessary to consider the phase of radio wave. A radio wave could be weakened by radio waves which has opposite phase. Calculation of radio wave phase of multi signals could be described by electric field created by mesh node antenna. By using this electric field model, we could accumulate some interference signals as vector. I have an idea of implementation. Though I need some more time to implement this. Regards, Masashi Honma.
