公开(公告)号：EP0609429A4

公开(公告)日：1995-02-15

申请号：EP93920247

申请日：1993-08-23

申请人： MOTOROLA INC

发明人： FRENZER MICHAEL W ,  LOCASCIO ROBERT J ,  ZOCHER JOAN E ,  WALTHER DWIGHT D ,  SEITZ MARTIN V ,  KURBY CHRISTOPHER N

IPC分类号： H04Q7/38 ,  H04B7/185 ,  H04B7/195

CPC分类号： H04B7/18567 ,  Y02D70/00 ,  Y02D70/446

摘要： The present invention includes a low-earth satellite-based paging broadcast system (100) and method (200, 300) that maximizes spectral efficiency and minimizes power expenditure for the broadcast of paging messages by broadcasting the messages to terminator- or originator-selectable portions of the total system coverage area. The terminator selects a long-term preferred geographic area (LTPGA), and optionally, a short-term preferred geographic area (STPGA). The originator provides the terminator ID, the message, and optionally provides a customized preferred geographic area (CPGA). Terminators and originators can easily modify the selectable geographic areas (SGA(s)): LTPGA(s), STPGA(s), and CPGA(s). The gateway converts the SGA(s) to addressable coverage areas (ACA(s)), and transmits a signal including the paging information, and ACA(s) to at least a first communication satellite (COM SAT). The COM SAT(s) provide for crosslinking the signal to other COM SAT(s) and for broadcasting the paging information to the ACA(s).