defines

the periodicity of the DRX process.

The longer the DRX cycle, the longer the UE is in a sleep state, but the longer the delay before the UE can respond to a paging message.

DRX cycle length = 2^k frames for FDD mode

where k is DRX cycle length coefficient.

is

the SFN of the frame of which the UE must monitor the PICH to see whether a paging message is being sent to the UE.

For FDD,

paging occasion (SFN) = (IMSI div K) mod (DRX cycle length) + n* DRX cycle length

where n=0, 1, 2, up to a maximu such that SFN is valid (i.e. <4096) and

K is the number of SCCPCHs that carry a PCH.

is

one of states in RRC connected mode.

In Cell_PCH, the UE has no uplink resources. The UE monitors the paging channel using the assigned discontinous reception (DRX) parameters.

The UE will entern into Cell_FACH

1. when it detects the cell change, it performs cell update in Cell_FACH

2. when it is paged by the UTRAN