Packet data communication network

Details Packet data communication network Packet data communication network

1990-12-19

1992-10-20

Tarcza, Thomas H.

Pulse or digital communications

Repeaters

Testing

235472, 235462, 235385, H04K 100

Patent

active

051576872

ABSTRACT:
A packet data transmission system is used to link a number of remote hand-held data-gathering units such as bar code readers to a central computer which maintains a database management system. Data packets are sent from the remote units by an RF link to intermediate base stations, then sent by the base stations to the central computer by a serial link. Direct sequence spread spectrum modulation is used for the RF link. The remote hand-held units initiate an exchange using RF transmission to and from the base stations, receiving only during a rigid time window following a transmission from the remote unit. The base stations cannot initiate communication to the remote units, but instead send data to the remote units only as part of the exchange.

REFERENCES:
patent: 3641433 (1972-02-01), Mifflin et al.
patent: 4247908 (1981-01-01), Lockart et al.
patent: 4291409 (1981-09-01), Weinberg et al.
patent: 4332027 (1982-05-01), Malcolm et al.
patent: 4409470 (1983-10-01), Shepard et al.
patent: 4475208 (1984-10-01), Ricketts
patent: 4639914 (1987-01-01), Winters
patent: 4672658 (1987-06-01), Kavehrad et al.
patent: 4689785 (1987-08-01), Toyonaga et al.
patent: 4689786 (1987-08-01), Sidhu et al.
patent: 4697281 (1987-09-01), O'Sullivan
patent: 4704517 (1987-11-01), Campisi et al.
patent: 4740792 (1988-04-01), Sagey et al.
patent: 4789983 (1988-12-01), Acampora et al.
patent: 4829540 (1989-05-01), Waggener, Sr. et al.
patent: 4850009 (1989-07-01), Zook et al.
patent: 4933953 (1990-12-01), Yagi
patent: 4995053 (1991-02-01), Simpson et al.
patent: 5006996 (1991-04-01), Nakamura et al.
patent: 5008899 (1991-04-01), Yamamoto
patent: 5029183 (1991-07-01), Tymes
patent: 5056106 (1991-10-01), Wang et al.
patent: 5056107 (1991-10-01), Johnson et al.
MSI Data Corporation, Costa Mesa, Calif.; Product Brochure; MSI PRT Portable Radio Terminal; 2 pages; 1988.
Vectran Corporation, Pittsburgh, Pa.; Product Brochure; VR1100, VR1120, VR1130, VR1150 Radio Terminals; 13 pages; 1988.
Freret et al., "Applications of Spread-Spectrum Radio to Wireless Terminal Communications"; Conference Record; NTC Conf.; Nov. 30, '80, p. 69.7.1.

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