- This topic has 8 replies, 1 voice, and was last updated 13 years, 11 months ago by mahamudul Hasan.
7th November 2006 at 14:16 #46095JaviGuest
I’m planning a GSM/GPRS network in urban area. I have to serve only a limited area and the traffic map that I have is for a bigger area. So, my planned stations serve traffic that I want to cover, and much more from the adjacent areas.
With a radio planning tool I reach the aim if I set the power transmission about 20dbm in each station.
My question: Is it possible to have this power level at the Base Stations, or are they supposed to work at ~43dbm?7th November 2006 at 21:41 #46096pixGuest
you are following the wrong path here, in my opinion.
what you should do is draw a computation/working zone on your traffic map, so your sites will cover only this delimited area. The traffic and coverage will be limited to your study needs.
Unless of course you REALLY don’t want your sites to cover outside the area. Then you have to modify the downtilt and azimtuh of your antenna (or even your antenna types).
If you design your site to emit with 23dB attenuation, you’ll have serious issues covering indoor areas !!
Yes, it is possible to decrease the emitting power of a cell.8th November 2006 at 11:45 #46097JaviGuest
Thanks a lot Pix.
So, I’ll try to re-draw the traffic map, or I will try to find a function in the simulation programm (ATOLL) to limit the service only in my delimited area.
Even having traffic demand and coberture outside, It won’t be served.
Another question: Where can I find BTS hardware connection schemes? Not so specific, only to include in my project some ideas about the hardware that I need (rack, cards, batteries, duplexors, cables…) and how it is connected8th November 2006 at 15:29 #46098pixGuest
yes it won’t be served in your planning project, but it will be served in reality.
in Atoll, you should be able to find a “computation” zone or something equivalent. I work with A9155, based on Atoll technology, and that feature exists.
for info about BTS design, you’d rather google it. Vendor documentations are usually extremely complicated and it’ll take you a while to understand the simplest things…
good luck for your project 🙂9th November 2006 at 19:21 #46099JaviGuest
About the information related to BTS that I want to know: Ok, I have the technical data for a Siemenes BTS (for example BS-240 XL). Well, It goes perfectly but I need to depict a connection scheme.
I mean, if a need a duplexor, diplexor, how many cables, what kind of cables… things like that.
That’s why I’m looking for an example and more technical information.
The vendors only provide this information to a well-know customer, isn’t it?
Could somebody (I don’t care the vendor) list the hardware that I need? (BTS, antenna, filter, wires, batteries, power supply…) and how they are connected.
Thanks in advance11th November 2006 at 15:50 #46100JaviGuest
i’m sorry, you should try to contact a vendor/operator directly… if you are studying in telecoms, i’m sure your university has contact with them, don’t they ?
really sorry about that, i don’t feel good about exchanging internal docs on the web.13th November 2006 at 02:17 #46101pixGuest
sorry javi, that was me writting just before… i kidnapped your name 🙂13th November 2006 at 17:56 #46102JaviGuest
Ok, I understand that.
Thanks anyway.29th May 2007 at 13:17 #46103mahamudul HasanGuest
How i will measure Tx power of MW link.Plz tell me…….