In general, paging-related delays are reduced by empowering an idle mobile
(120) to initiate a transition to semi-dormant, unslotted mode, and/or
RSCI modes, based on triggers (304) known to the MS. This is an efficient
manner (in terms of both RF and battery-life cost considerations) in
which to use semi-dormant and RSCI modes (306). If the MS (120) is able
to anticipate a paging channel (PCH) message (for example, after sending
or receiving an SMS or presence update), then the MS can intelligently
reduce its slot cycle index for a short period of time, sacrificing a
small amount of battery life, when the R-SCI is most likely to deliver
improved service. Moreover, if the MS is low mobility (i.e. low idle
handoff rate), then the MS can transition to a semi-dormant mode with
very little cost, since it will not need to send many radio environment
reports.