Wireless communication system

Multiplex communications – Wide area network – Packet switching

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375376, 331 25, H03L 708

Patent

active

055131840

ABSTRACT:
The present invention overcomes the prior art limitations by dividing a coverage area into very small regions or cells. The inventive system can be built as an adjunct to a wired telecommunication system such as a PBX. Advantageously, because of the relatively small size of each cell, transceivers in the inventive system can use very low transmission power, compared with a pico-cellular communications system, to communicate with a fixed transceiver. In addition, because of the relatively short distance between the mobile handset and the fixed transceiver, the communication paths between any two transceivers are reduced and, therefore, the multipath distortion which can affect the received signals is substantially reduced.
A concomitant problem normally associated with relatively small cells is the need for a switching system which can accommodate the large amount of switching or handovers required to accommodate the various mobile units as they move from one cell to another. In accordance with the present invention, this problem is solved by a switching technique which is not centralized in the PBX but, rather, is effectively distributed among the individual fixed-call terminals.

REFERENCES:
patent: 4807222 (1989-02-01), Amitay
patent: 4825437 (1989-04-01), Balech
patent: 4847876 (1989-07-01), Baumbach et al.
patent: 4939790 (1990-07-01), Sgrignoli
patent: 4953185 (1990-08-01), Goode
patent: 4980899 (1990-12-01), Troost et al.
patent: 5046066 (1991-09-01), Messenger
39th IEEE Veh. Tech. Fonf., San Francisco, CA, (May 1988) pp. 186-191 "Properties of a TDMA Pico Cellular Office Communication System" D. .ANG.kerberg.

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