초록 ▼

A satellite-based, world-wide cellular messaging system (5) transmits paging messages to pagers (2) via multiple beams. A pager (2) monitors multiple beams, recording the schedules for each beam, and by combining the schedules for multiple beams, ultimately determines which frames in the message gro

A satellite-based, world-wide cellular messaging system (5) transmits paging messages to pagers (2) via multiple beams. A pager (2) monitors multiple beams, recording the schedules for each beam, and by combining the schedules for multiple beams, ultimately determines which frames in the message groups to monitor for messages. Pager (2), which conserves battery resources by entering into a sleep mode, synchronizes quickly to its message block when it awakes.

대표청구항 ▼

[ What is claimed is:] [1.] A method of operating a pager in a satellite paging system having a plurality of satellites each projecting a plurality of overlapping beams, said pager having a sleep cycle and a wake cycle, said pager being subjected to transmitted information in which a plurality of me

[ What is claimed is:] [1.] A method of operating a pager in a satellite paging system having a plurality of satellites each projecting a plurality of overlapping beams, said pager having a sleep cycle and a wake cycle, said pager being subjected to transmitted information in which a plurality of messages are grouped into a frame, a plurality of frames being grouped into a group, and a plurality of groups being grouped into a block, each of said frame having a frame header comprising frame, group, and block identification, predetermined frames each comprising a block header, said predetermined frames constituting an acquisition group, and said pager storing an identification value identifying a block to which said pager is assigned, said method comprising the steps of:(a) said pager exiting said sleep cycle and examining one of said transmitted frame headers;(b) if said frame header contains said identification value, proceeding to step (c), otherwise proceeding to step (d);(c) said pager determining from said group identification whether said frame is part of said acquisition group;(i) if so, said pager monitors said acquisition group comprised of multiple frames, said pager selects block headers from a portion of said multiple frames dispersed across a number of said plurality of overlapping beams having signal quality above a threshold, said pager compares commonalities of each of said block headers of said portion of said multiple frames, and from said commonalities, said pager generates a pager monitor schedule;(ii) if not, said pager proceeds to step (d);(d) said pager using said pager monitor schedule to determine when it should awake from said sleep cycle to monitor any one of said plurality of overlapping beams, then proceeding to step (e); and(e) said pager entering said sleep cycle.