How many subscriber will share one PDCH slot in the GPRS

[wael]

Dear GPRS Experts
How many subscriber will share one PDCH slot in the GPRS ?

[firstmaxim]

Dear GPRS Experts
How many subscriber will share one PDCH slot in the GPRS ?

It depends whether you are referring to the uplink or the downlink.

For the uplink, there are two methods of assignment-static method based on bit map, and then there is the dynamic method, based on the 3 bit uplink status flag-USF. The count for USF is a maximum of 8. So, this precludes one PDCH to be shared by more than 8 users on the uplink.

For the downlink GPRS is limited by the 5 bit TFI (temporary flow identifiers). One can have a maximum of 32 TFIs per frequency. Also, there is another limitation on each PDCH. This involves the Timing index allocation offset (this has a maximum count of 16).

These are the limitations specified by the standards. However, practical considerations such as service type, quality, load and need for lessening congestion will limit operators to a fewer users per PDCH.

[wael]

many thanks , it is clear Now

[coursekec]

Very good explanation...