发明名称 |
GEOGRAPHIC-AREA SELECTIVE LOW-EARTH SATELLITE-BASED PAGING BROADCAST SYSTEM AND METHOD |
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). |
申请公布号 |
WO9405093(A1) |
申请公布日期 |
1994.03.03 |
申请号 |
WO1993US07851 |
申请日期 |
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. |
分类号 |
H04Q7/38;H04B7/185;H04B7/195 |
主分类号 |
H04Q7/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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