[ns] TKN 802.11e with RTS/CTS

2006-10-27 Thread michelenuti


Hi ns-useres,
I would like to know how can I add RTS/CTS to the TKN 802.11e model for NS2_26.

I've tried by setting
RTSTHhereshold_ 0, but my simulation abort telling me something like:

(0) RECEIVING DATA!!!
(0) RECEIVING DATA!!!
(0) RECEIVING DATA!!!
...


I really need to know if it is possible to do it and how.

Thank you very much,
Michele Nuti


[ns] TKN 802.11e model and RTS/CTS

2006-10-18 Thread michelenuti

Dear NS-users,

I'd like to know if it is possible to add RTS/CTS to the 
TKN model of 802.11e for NS 2.26.
If it is possible, what do I have to do?

Thank you very much,
Michele


[ns] Dropping Packets with RTR CBK

2006-09-19 Thread michelenuti

Hi ns users,
does anybody know what does it mean when a TCP packet is dropped and in the 
trace file is indicated as RTR CBK?

Thanks a lot,
Michele Nuti


[ns] RTR CBK

2006-09-15 Thread michelenuti


Hi NS users,
I'd like to know what does it mean in the trace file this thing:

D 12.020142136 _5_ RTR  CBK 981 tcp 1500 [13a 1 0 800] --- [0:2 4194305:1 
28 4194305] [494 0] 0 0

RTR CBK what kind of drop is?
It happens when the Access Point try to send in the wireless channell a high 
bit rate...

Thank you very much,

Michele


[ns] RTT: how it works?

2006-09-01 Thread michelenuti

Dear NS users,
I'd like to understand how ns calculate the rtt in a TCP connection.
What the rtt_ variable state trace? It is the delay of the TCP packets + =
the delay of the ACK packets?
And it is expressed in s, ms
Please help me.

Thank you very much.
Michele Nuti




[ns] Scheduler: Event UID not valid! without RTS/CTS

2006-08-10 Thread michelenuti

Hi NS users,
I remove RTS/CTS from MAC 802.11 (setting RTSThresh_ 3000) and now I often (but 
not always)
receive this message:

Scheduler: Event UID not valid!

and the simulation stop.
Does anybody knows why and how to solve the problem?

Thanks a lot,
Michele


[ns] How to disable RTS/CTS

2006-08-08 Thread michelenuti

Hi Ns users,
does anybody if it is possible and how to disable the RTS/CTS in MAC 802.11?

Thanks a lot,
Michele Nuti


[ns] Throughput in TKN 802.11e

2006-07-25 Thread michelenuti


Hi NS users,
I have a question about Throughput in 802.11e model of TKN. 
Why if I set a TCP flow with lower priority (prio_ 3) in 802.11e MAC  it has a 
higher throughput of the same flow
with 802.11 MAC?
I think that the throughput should improve only with high priority (0, 1, 2)...

Thank you,
Michele Nuti


[ns] TKN 802.11e and Wireless Channell Error Model

2006-07-18 Thread michelenuti


Hi NS users,
I have a problem with 802.11e Model of TKN of Berlin.
If I set an Error Model for the wireless channel using Mac 802.11e, no one 
packet is dropped in the trace file.
If I use the same simulation just changing MAC 802.11e with MAC 802.11 I see 
that some packet get lost in the wireless channell.
Does anybody knows how to use Error Model with 802.11e Model?


Thanks a lot,
Michele Nuti


[ns] TKN Model 802.11eand wireless Error Model

2006-07-12 Thread michelenuti

Hi NS users,
I have a problem with 802.11e Model of TKN of Berlin.
If I set an Error Model for the wireless channel using Mac 802.11e, no one 
packet is dropped in the trace file.
If I use the same simulation just changing MAC 802.11e with MAC 802.11 I see 
that some packet get lost in the wireless channell. 
Does anybody knows how to use Error Model with 802.11e Model?


Thanks a lot,
Michele Nuti 



[ns] Handover: 2 or more Access Points

2006-04-27 Thread michelenuti

Hi,
I would like to simulate a wired cum wireless scenario with 2 or more access 
points: what do I have to add to the tcl file to make the handover possible?

Thanks a lot,
Michele 


[ns] Pareto distribution problem in wireless scenario

2006-03-30 Thread michelenuti


Hi,
I've noted that in NS version 2.26, the Pareto distribution only works =
in wired scenarios, but not in wireless scenarios.

Does anybody knows why and how to solve the problem?

Thanks a lot,
Michele