Re: [ns] proper values for 11Mbps wireless simulation

[Daichi Furusaka <furu@ht.sfc.keio.ac.jp>]

Thanks a lot.

I lost no time to change its paramter ("Mac/802_11 set bandwidth_ 11Mb")
and run my simulation.
It is multihop wireless simulation using DSR (max 7 hops).
But it didn't work well.  Mobile nodes could not send data.
RouteDiscovery packets seemed to be propagated.
Packet collision was very few.

Why ?

Does It come from the lack of CCK modulation ?
Or something about IFS params ?
Is Mac/802_11 far different from IEEE 802.11b ?

# I guess MacTimers have some problem.  But not sure.
-- furu

From: Felix Ko <felix.ko@mchp.siemens.de>
Subject: Re: [ns] proper values for 11Mbps wireless simulation
Date: Thu, 28 Jun 2001 10:12:14 +0200

> Hi!
> 
> > What I have done is only to change bandwidth_ of Phy/WirelessPhy to 11e+6.
> 
> Are you sure that the "bandwidth_"-parameter of "Phy/WirelessPhy" really
> effects the time/speed of your packet-transmissions?
> 
> In my opinion, it's only used to calculate the energy consumed during
> the transmission.
> 
> If you want to toggle the transmission speed, you should
> use the "bandwidth_" parameter of "Mac/802_11"...
> 
> Bye
> 
> Felix
> 
>