[ns] big delay by MAC-802_11 bug

[David Ross]

Anas, the delay is not the MAC, it is the RTR to the MAC, which is the 
IFQ.  The only time I see these delays is with lots of nodes and lots of 
queued packets, say 50 queued and each takes 3 seconds to win contention 
= 150 seconds for the packet to get out.

- David Ross
QUT, Australia. (UTC+10hours)

anas wrote:
> Dear all,
>
> I have encountered a large delay end to end delay
> and when I checked the out put file I see some of the packets have a very 
> large delay at MAC layer as shown below:
>
> f 202.663960039 _25_ RTR  --- 585 cbr 576 [13a 2b 19 800] ------- [9:1 10:1 
> 25 30] [17] 7 2
> s 358.840523771 _25_ MAC  --- 585 cbr 634 [13a 1e 19 800] ------- [9:1 10:1 
> 25 30] [17] 7 2
> as it appears there is about 150 second at MAC layer
>
> what is the bug here
> I used NS2.33 under both Linux and sygwin all of them have the same bug
>
> please help me
> best regards
> Anas 
>