Multiplex communications – Communication over free space – Repeater
Reexamination Certificate
2003-08-06
2008-11-11
D'Agosta, Stephen M (Department: 2617)
Multiplex communications
Communication over free space
Repeater
C455S041200, C455S041300, C455S456100, C455S556100, C455S090100
Reexamination Certificate
active
07450538
ABSTRACT:
A method is proposed for operating a system according to TDMA (Time Division Multiple Access) with a multiplicity of wireless sensors and/or actuators as nodes (S.1. . . S.n) and a base station (BS), said system being installed in a machine or installation, such as industrial robots or an automated manufacturing or production unit, whereby cyclical TDMA data transmission blocks are transmitted and each TDMA data transmission block is composed of consecutive time slots. Each time slot is allocated to a specific node. The uplink signals (UL.1. . . UL.n) can be transmitted from the different nodes (S.1. . . S.n) to the base station (BS) simultaneously on two, three or more different frequencies (f1,f2,f3) whereas the. downlink signals (DL) are transmitted from the base station (BSA) to the different nodes (S.1. . . S.n) on only one frequency, which differs from the uplink frequencies. The time slots and the different uplink frequencies of the different nodes are defined once and are thereafter retained.
REFERENCES:
patent: 4614945 (1986-09-01), Brunius et al.
patent: 5734963 (1998-03-01), Fitzgerald et al.
patent: 5748103 (1998-05-01), Flach et al.
patent: 6404751 (2002-06-01), Roark et al.
patent: 39 06 890 (1990-09-01), None
patent: 43 10 645 (1994-10-01), None
patent: 0 247 790 (1987-12-01), None
patent: 1 022 674 (2000-07-01), None
patent: WO 93/22849 (1993-11-01), None
patent: WO 96/08117 (1996-03-01), None
Rappaport, Theodore S., “Wireless Communications, Principles and Practice”, Prentice Hall 1996, ISBN 0-1375536-3, pp. 504-513.
Tanebaum, Andres S., “Computer Networks”, Third Edition, Prentice Hall, 1996, ISBN 0-13-394248-1, pp. 266-269.
Apneseth Christoffer
Dzung Dacfey
Endresen Jan
Vefling Harald
ABB Research Ltd
Buchanan & Ingersoll & Rooney PC
D'Agosta Stephen M
LandOfFree
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