Expert: Cezar L. Palconet Date: 2/4/2008 Subject: Enough bandwith for GSM
Question QUESTION: I read one question about 20 MHz for GSM, but my question is: How many MHz is enough for small GSM company?
ANSWER: Hi
Manuel
the question you pose is difficult to quantify since how small is small, how many nodes will there be, or how many BTS's, what kind of network topology that would be used, what is the coverage area, traffic density, all of this plays an important issues in defining the size or number of carrier frequency that will be used,
here is the bottom line, each carrier channel of 200 Khz. can carry eight communication channels.
now decide how many calls will be handled at peak traffic, then decide the area of coverage then its distribution, and where is the homing BSC would be. probably then you will have a better opicture of the requirement.
read some books on, GSM optimization, and call traffic prediction using poisons rule.
a good start would be the book od John Scourias,
pardon me but I may have got the spelling of his name wrong, any way try those, and get a better picture of what is required for a small enterprise.
good luck.
---------- FOLLOW-UP ----------
QUESTION: Thanks Expert,
I will research. But I think over some european operator in band 900. They have 10 x 2 MHz
Answer Hi
Manuel
Yes, in some EU countries, they use 10 Mhz. x 2 or less,the 2 stands for the go and return, as can be seen on a 960 Mhz. Channeling plan for GSM.
Each operator wants to limit his exposure to the right amount of spectrum specially in Europe, where the cost of spectrum is very high and highly competitive, it is most interesting to note that spectrum is more expensive where there is a high network demand for it, it is almost imposible for a small GSM enetprise to survive,with the current trend in mobile services, as you can observe that most mobile operators are merging resources and buisness, I know for a fact that one private enterprise operates its own enterprise GSM, but still homogenous with the public GSM, for reasons of connectivity.
