Multiplex communications – Wide area network – Packet switching
Patent
1993-11-10
1995-08-08
Marcelo, Melvin
Multiplex communications
Wide area network
Packet switching
370 952, 34082534, 34082544, 455 383, 4551512, 455231, H04B 1022, H04J 300, H04Q 720
Patent
active
054405599
ABSTRACT:
A portable communication device which also has an infrared transceiver. A portable communication device can automatically establish infrared communication sessions with another portable communication device or desktop computer having an infrared transceiver. The portable communication device and the other device may exchange textual and graphical information, as well as the current time, and then reconcile the newly received information with that information in possession before the communication session began. Multiple portable communication devices and computers may communicate, while conserving battery power, using a time division multiplexing scheme where the infrared transceivers are active during a short, periodic time slots. Multiple communication session may overlap in time as long as they are not active during the same time slot.
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Galbi Elmer
Marcelo Melvin
Seiko Communications Holding N.V.
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