8.5.49a CELL_FACH HS-DSCH DRX operation (1.28Mcps TDD only)

25.3313GPPProtocol specificationRadio Resource Control (RRC)Release 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

The CELL_FACH HS-DSCH DRX operation determines the occasions in which the UE is allowed to discontinuously receive HS-DSCH in CELL_FACH state.

The HS-DSCH DRX pattern is the set of frames in which the UE shall receive on downlink during the frame(s) with the SFN value fulfilling the following inequality:

(SFN  H-RNTI + 65536) mod DRX_cycle < Rx_burst

where:

– H-RNTI is the value stored in the variable H_RNTI;

– DRX_cycle is the length of the DRX cycle in radio frames, signalled by the IE "DRX cycle_FACH";

– Rx burst is the period in frames within the DRX cycle, in which the UE receives on downlink, signalled by the IE "Rx burst_FACH".