British Telecommunications Public Limited Company

Orbitel Mobile Communications Limited

Northern Telecom Limited

Stc, Inc

Kenwood Corporation

Gpt Limited

Gec Plessey Telecommunications Limited

Shaye Communications Limited

At&t Wireless Communications Products Limited

Mercury Communications Limited

Phonepoint Limited

Ferranti Creditphone Limited

Malcolm Crisp

Nigel Everard Barnes

Peter N Proctor

Rupert Goodings

Michael T Dudek

David C Odhams

Ian Rodgers

Graham E Beesley

Andrew Bud

Brian A Bidwell

Chris Cant

Richard Albrow

A communication procedure suitable for a cordless telephone system involves time division duplex radio communication between a handset 11 and a base station 3 using alternating bursts of transmission over a single radio channel. Once a radio link has been set up, initial transmissions carry a synchronisation logical channel S and a signalling logical channel D multiplexed together, but the link may switch to bursts carrying a communications logical channel B for the speech data and the signalling logical channel D. Burst synchronisation is achieved by the asynchronous detection of words in a synchronisation channel S. These words have bit patterns reducing the probability of incorrect asynchronous detection of them. If one part ceases to receive handset signals from the other, it transmits a special signal, informing the other part. This enables both parts to detect the failure of a link at substantially the same time, so that their actions to re-establish the link are synchronised.

Time division duplex telecommunication system

Technique for time-division duplex cordless telecommunication

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Malcolm Crisp