Multiplex communications – Duplex – Communication over free space
Patent
1996-04-24
1999-08-24
Olms, Douglas W.
Multiplex communications
Duplex
Communication over free space
370342, 370348, 370350, 375356, 455502, H04J 1302
Patent
active
059433221
ABSTRACT:
Personal communications in a code division multiple access system operated without a base is provided with simultaneous transmission of a communications channel and a control channel, each spread by different PN codes. The PN code facilitates restricting communications on the network to a particular conversation mode and between identified radios. Transmissions are performed in a time division duplex manner in 62.5 milliseconds slots. One of the radios initiates transmission and maintains power control and time synchronization normally done by a base station. A network control station can voluntarily or by command transfer control of the network to any of the other radios on the network. Colliding transmissions from more than one radio require the radios to retry transmitting until one of the radios transmits in an earlier time slot. Conversational mode capability is provided by equipping the radio receivers with despreaders in parallel for permitting a receiving radio to separately despread the simultaneously transmitted signals all other radios on the network and responding to each radio transmission individually. Simultaneous voice and data communications can be accomplished by equipping the receivers with despreaders for discriminating voice and data information signals spread by different PN codes.
REFERENCES:
patent: 5317593 (1994-05-01), Fulghum et al.
patent: 5329558 (1994-07-01), Larsson et al.
patent: 5371901 (1994-12-01), Reed et al.
patent: 5379279 (1995-01-01), Backof et al.
patent: 5422952 (1995-06-01), Kennedy et al.
patent: 5471650 (1995-11-01), Vexler et al.
patent: 5509002 (1996-04-01), Baden et al.
patent: 5511090 (1996-04-01), Denton et al.
patent: 5621723 (1997-04-01), Walton, Jr. et al.
patent: 5625653 (1997-04-01), Kaewell, Jr. et al.
Gilmour Paul A.
Mayor Michael A.
ITT Defense, Inc.
Olms Douglas W.
Rao Seema S.
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