Temporary Block Flow

Author: Kabeer Ahmed, http://skabeer.ahmed.googlepages.com/ Last Updated: November 27th, 2006

Definition

The main goal of GPRS service is the transfer of Packet Data. Packet data in GPRS is transferred in the form of orderly blocks.

Application data reaches the RLC from LLC. RLC segments this blocks and MAC transfers these blocks across the air interface in an orderly manner. This transfer of the blocks is known as a TBF - Temporary Block Flow.

Description

TBF is of two types. Uplink TBF and Downlink TBF.

Uplink TBF

Uplink TBF for a two phase access is as shown in the picture below

To be continued........