[Ns-developers] big delay in MAC-802_11 in NS2.33

[David Ross]

Anas, see my post to ns-users (sorry, I see you got no response in 3 
days before posting here - I only look at the lists occasionally)  The 
delay is between RTR forwarding and the MAC completing the send, which 
is unlikely to be a bug in the MAC, but more likely a large queue of 
packets waiting at this node in a network with lots of nodes in heavy 
contention.

Do you know if this is likely?

I suspect this is not a bug, so should move back to ns-users.

I'm writing-up, but will check ns-users again in a few days (sorry, very 
busy)

- David Ross.


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 
>