GB2174573B - Communications apparatus and method - Google Patents

Communications apparatus and method

Info

Publication number
GB2174573B
GB2174573B GB8511018A GB8511018A GB2174573B GB 2174573 B GB2174573 B GB 2174573B GB 8511018 A GB8511018 A GB 8511018A GB 8511018 A GB8511018 A GB 8511018A GB 2174573 B GB2174573 B GB 2174573B
Authority
GB
United Kingdom
Prior art keywords
transceiver
communications apparatus
transmit power
existing users
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB8511018A
Other versions
GB2174573A (en
GB8511018D0 (en
Inventor
Graham Edgar Beesley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinclair Research Ltd
Shaye Communications Ltd
Original Assignee
Sinclair Research Ltd
Shaye Communications Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sinclair Research Ltd, Shaye Communications Ltd filed Critical Sinclair Research Ltd
Priority to GB8511018A priority Critical patent/GB2174573B/en
Publication of GB8511018D0 publication Critical patent/GB8511018D0/en
Publication of GB2174573A publication Critical patent/GB2174573A/en
Application granted granted Critical
Publication of GB2174573B publication Critical patent/GB2174573B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment

Abstract

In communications apparatus, particularly cordless telephone sets, there is a need to maximise the number of communication links that can be made from a given area or volume. This is achieved by reducing the transmit power of a transceiver Y below its maximum in response to a signal level 50 of existing users V on that channel, as measured by the transceiver Y that is setting up a call. In particular, the reduction in transmit power p' is dependent on (e.g. equal to) the amount p by which the power of existing users exceeds a predetermined lower threshold TL. <IMAGE>
GB8511018A 1985-05-01 1985-05-01 Communications apparatus and method Expired GB2174573B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8511018A GB2174573B (en) 1985-05-01 1985-05-01 Communications apparatus and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8511018A GB2174573B (en) 1985-05-01 1985-05-01 Communications apparatus and method

Publications (3)

Publication Number Publication Date
GB8511018D0 GB8511018D0 (en) 1985-06-12
GB2174573A GB2174573A (en) 1986-11-05
GB2174573B true GB2174573B (en) 1989-06-28

Family

ID=10578473

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8511018A Expired GB2174573B (en) 1985-05-01 1985-05-01 Communications apparatus and method

Country Status (1)

Country Link
GB (1) GB2174573B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001810C2 (en) * 1990-01-23 1996-02-08 Loewe Opta Gmbh Energy saving circuit in a mobile device for wireless communication
GB2241851A (en) * 1990-03-09 1991-09-11 Philips Electronic Associated Optimising transmitter power in a communications system
US5475861A (en) * 1992-07-01 1995-12-12 Motorola, Inc. Method for controlling transmission power in a communication system
CA2335882A1 (en) * 1998-06-23 1999-12-29 Siemens Aktiengesellschaft Method for regulating power of point-to-multipoint connections in wireless telecommunications systems during an uncoordinated unlicensed system operation
US6654608B1 (en) 1999-04-27 2003-11-25 Telefonaktiebolaget Lm Ericsson (Publ) Tailored power levels at handoff and call setup
GB0323429D0 (en) 2003-10-07 2003-11-05 Roke Manor Research Spectrum sharing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132454A (en) * 1982-12-27 1984-07-04 Western Electric Co Improvements in or relating to radio communication apparatus and systems
EP0154338A2 (en) * 1984-03-09 1985-09-11 Nec Corporation Precipitation loss compensation and disablement for avoidance of satellite transponder overloading

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132454A (en) * 1982-12-27 1984-07-04 Western Electric Co Improvements in or relating to radio communication apparatus and systems
EP0154338A2 (en) * 1984-03-09 1985-09-11 Nec Corporation Precipitation loss compensation and disablement for avoidance of satellite transponder overloading

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WO 86/00486 *

Also Published As

Publication number Publication date
GB2174573A (en) 1986-11-05
GB8511018D0 (en) 1985-06-12

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20050430