Hi All, I've been going through the source code of Mac802_11. And I find that in the standard distribution of ns when it's necessary to do deferral and back-off together, it often does like these: *mhBackoff_.start(cw_, is_idle(), phymib_.getDIFS()); *mhDefer_.start(phymib_.getDIFS() + rTime); But back-off procedure is interruptable and deferral can not be “interrupted”, is this a BUG to use one timer to do two things? i.e. If, in ns, we’re backing off for a time of DIFS + rTime, and is interrupted when the time hasn’t elapsed for more than DIFS, so the left time is rTime + sometime. And at the next time when we want to access the medium, the deferral time SHOULD be DIFS + REMAINING_TIME. But now the REMAINING_TIME equals to rTime + sometime, which is greater than the CW we chose before. I am not sure whether I was right. I hope someone can help me. Any comment will be welcomed. Best regards, Huang Wei
