PIPELINE COMMUNICATION SYSTEM

WIPO Patent Application WO1998013960

A3

A pipeline communication system. The system uses the pipeline and the adjacent ground and includes branches with junctions. Governor modules and transformers/rectifiers form part of the network. Monitors periodically provide information to the network controller. The system control receives information by way of an outstation to provide two-way communication and control using the pipeline and adjacent ground as conductors. Typically, the information in the form of fast frequency shift keying modulation is superimposed on the cathodic pipe protection system.

JP3727589	Methods and systems for controlling and exchanging data related to multimedia devices and devices suitable for this method and system.
WO/2000/027079	INTERNET GIGABIT ETHERNET TRANSMITTER ARCHITECTURE

AUSTIN DAVID (GB)
BROEKHUIZEN KOOS (GB)
CORDES PAUL BEAUMONT (GB)
FOSTER GERARD TERENCE (GB)

PCT/GB1997/002590

May 07, 1998

September 24, 1997

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BRITISH GAS PLC (GB)
AUSTIN DAVID (GB)
BROEKHUIZEN KOOS (GB)
CORDES PAUL BEAUMONT (GB)
FOSTER GERARD TERENCE (GB)

H04B3/00; G08C19/00; H04B13/00; H04L7/02; H04L27/148; (IPC1-7): H04B13/00

WO1993026115A2	1993-12-23
WO1997031438A1	1997-08-28

FR2097265A5	1972-03-03
US3551890A	1970-12-29
EP0468359A2	1992-01-29

BIC, DUPONTEIL, IMBEAUX: "Elements of Digital Communication", 1991, JOHN WILEY & SONS, CHICHESTER, GB, XP002057683
BIC, DUPONTEIL, IMBEAUX: "Elements of Digital Communication", 1991, JOHN WILEY & SONS, CHICHESTER, GB, XP002057684

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