Multiplex communications – Wide area network – Packet switching
Patent
1994-08-02
1996-05-21
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
370 681, 379 60, 455 561, H04Q 722
Patent
active
055196977
ABSTRACT:
In a cellular communication system where mobile telephone switching offices (MTSO) are connected to an ISDN, traffic data is sent from each MTSO at intervals to cell-site base stations via ISDN, indicating a volume of calls received during a predetermined time interval by the MTSO from the base stations and a volume of calls transmitted from the MTSO to the base stations during the same time interval. Each base station analyzes the transmitted traffic data to produce percentage values representing the capacities of the MTSOs for receiving calls from the base stations. When the base station receives a call from a mobile station, it generates a routing code according to the percentage values, and transmits it with the destination address of the call to the ISDN, where it is translated so that the call is routed to one of the mobile switching systems identified by the routing code.
REFERENCES:
patent: 4989231 (1991-01-01), Ishikawa
patent: 5363428 (1994-11-01), Nagashima
patent: 5379448 (1995-01-01), Ames et al.
EIA Interim Standard, "Cellular System Mobile Station-Land Station Compatibility Specification", IS-3-D, Preface, Notes, Table of Contents and pp. 1-59 (68 pages total), (Mar. 1987).
Fujita Kousaku
Yahagi Masahiko
NEC Corporation
Safourek Benedict V.
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