Patent ID: 8243640

Claim:
A method of discontinuous reception in a mobile device of a PICH (paging indicator channel) signal, comprising: powering up a WCDMA (wideband code division multiple access) mobile device; waking up functional units of said mobile device, obtaining system information and registering with a mobile network; configuring a DRX (discontinuous receiver) unit to detect PICH (paging indicator) and S-CCPCH (second common control channel) signals; entering an idle mode for a host processor and a modem of said functional units and placing an RF transmit and receive function into a partially active mode; waking up said RF function by said DRX unit on a paging occasion; detecting the PICH signal and demodulating S-CCPCH signals by the DRX unit while the modem is in the idle mode, wherein the modem is only required to awake from the idle mode if demodulation of other than the PICH and the S-CCPCH signals is required; and waking up said host processor by the DRX unit and coupling a paging message to said host processor.