Re: [ns] Cell size in mobile IP`

[wan@comet.columbia.edu (Chieh-Yih Wan)]

Hi Cindy,

At the edge of a base station coverage, the minimum power to
receive a packet should be:

	Pr = RXThresh_ (receive power threshold in Watts)

Then from the formula, given the transmission power
Pt_ you can get transmission radius or vice versa. "d"
should be the transmission radius of a base station.

Hope this help.

Chieh-Yih

> 
> Hi Chieh-Yin,
> I set the Gt_ and Gr_ of the antenna to 40.0. From my simulation, the
> domain of HA and FAs is about 800m. I would like to calculate exactly the
> distance covered by HA or FA. From the formular that I found in
> tworayround.cc (Pr= (Pt * Gt * Gr * ht^2 * hr^2)/d^4). The default value of
> Pt is 0.2818, ht and hr are 1.5. Could you please tell me what the value
> for Pr such that I can get the value of d from the above formular. And is
> the "d" stand for diameter?. Please help
> 
> Thank you very much,
> Cindy
> 
> 
> At 02:44 PM 05/26/2000 -0400, you (Chieh-Yih Wan) wrote:
> >Hi, you can change the value of Pt (transmission power). Use
> >the formula for two-ray ground model and you can calculate
> >the exact coverage.
> >
> >Hope this help.
> >
> >Chieh-Yih
> >
> >> 
> >> > Jee-Hyun Park wrote:
> >> > 
> >> > Dear sir;
> >> > 
> >> > I have two questions.
> >> > I want to know the default cell size covered by HA or FA in mobile IP.
> >> You may find this by experimenting (setup a cbr on a CN and connect it
> >> with
> >> your MH), and change the values:
> >> Antenna/OmniAntenna set Gt_ x
> >> Antenna/OmniAntenna set Gr_ y
> >> by default these values are 1
> >> Just keep in mind that even if the BaseStations Tx reaches the MH, maybe
> >> the
> >> MH Tx is lower and can treach the BaseStations. I dont know how to
> >> change
> >> the Tx level of the MH so any help would be appreciated.
> >> 
> >> (Anyone else wants to help out a bit?)
> >>  
> >> 
> >> -- 
> >> |George G. Karavitis       gk12@ukc.ac.uk|
> >> |MSc in Communication Systems Engineering|
> >> |University of Kent at Canterbury        |
> >> 
> >
> >
> Diepchi Tran 
> Phone (216) 433-8861
> Fax   (216) 433-8705
>