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I'm confused abiut your question
Well, GPRS is one part of the GSM technology using by the user to transmit the data over their cellphone
Ussually this technology offering us the speed about 15 kbps - 144 kbps theoriticly
In the reality, we just can sent the data in a slow speed
look my friend here i will assume that you have the minimum knowledge about GSM, any way in GSM we used to have a very low bitrate about 13 kbps and we used a circuit switched tech. but after that user started to need some applications on thier mobiles on their mobiles so we added a new service called GPRS to the mobile in which the user instead of using only one time slot to send his data he will be able to use up to 7 time slots (theoretically) and 4 time slots (practically) so his bit rate will be up to about 40 kbps also we used packet switched tech. to send the data ( you know where ever we have data we have packet switched) and to be able to control that packet data we have to add some blocks in the core network so added some switching devices and a gate way to communicate to the internet or any packet switched based network anyway this is a very abstracted introduction for GPRS of course this is not enough if you are trying to fully understand GPRS i think you will need any reference about GPRS
Thanks cabone:
That was helpful. But what I wanted to know was, whether GPRS data is transmitted over TCH or other control channels available in GSM. Which logical channel of GSM is used for GPRS?
Can u refer me to any good article on GPRS.
Actually GPRS was introduced to make GSM users enjoy the data services
By introducing GPRS followed by EDGE tech, operator wanna make users
more comfortable using data services which will be handled by new 3G system
As we know that in 3G we can get a faster data rate than in GPRS or EDGE
GSM 2G
GPRS 2.5G
EDGE 2.75G
Thanks cabone:
That was helpful. But what I wanted to know was, whether GPRS data is transmitted over TCH or other control channels available in GSM. Which logical channel of GSM is used for GPRS?
Can u refer me to any good article on GPRS.
GPRS data is transmitted using TCH,which is just a normal physical channel dedicated for traffic,the traffic channel is booked for GPRS by two ways;either on demand or dedicated
if it is on demand that means that the TCH is free for the use of either the voice(GSM or either the data(GPRS)according to the traffic volume of voice and data at the cell
if it is dedicated that means that the TCH is dedicated for the use of data only and not available to voice at all.
Also GPRS has control channels as in GSM and it uses it,if these control channels aren't available at the cell ,control channels of GSM may be used instead such as BCCH,PCH,RACH,SACCH
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