Whenever the mobile station detects an assigned USF value on an assigned PDCH, the mobile station will transmit either a single RLC/MAC block or a sequence of four RLC/MAC blocks on the same PDCH for that TBF except if that TBF is running in extended uplink TBF mode, in which case the mobile station may transmit RLC/MAC block(s) for other TBFs assigned on the same PDCH. The number of RLC/MAC blocks to transmit is controlled by the USF Granularity parameter characterizing the uplink TBF.
The GPIB command to set this parameter is CALL:(PDTCH|PDTChannel):MACCess[:DYNamic]:USFLag[:ASSigned]:GRANularity .
The Power Reduction (PR) field in the Packet Downlink Assignment and Packet Uplink Assignment message is used to help the mobiles in the GPRS/EGPRS network to determine the transmission power used to transmit a current downlink RLC/MAC blocks. The PR field consists of PR Mode and P0 values.
The GPIB command to set P0 is CALL:(PDTCH|PDTChannel):PZERo:LEVel .
The GPIB command to set PR Mode is CALL:(PDTCH|PDTChannel):PREDuction:MODE .