GB2350754B - Method of standby operation in a mobile telephone - Google Patents

Method of standby operation in a mobile telephone

Info

Publication number
GB2350754B
GB2350754B GB0006723A GB0006723A GB2350754B GB 2350754 B GB2350754 B GB 2350754B GB 0006723 A GB0006723 A GB 0006723A GB 0006723 A GB0006723 A GB 0006723A GB 2350754 B GB2350754 B GB 2350754B
Authority
GB
United Kingdom
Prior art keywords
clock signal
mobile
date
periods
counted
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 - Lifetime
Application number
GB0006723A
Other versions
GB2350754A (en
GB0006723D0 (en
Inventor
Fernando Romao
Karim Embarek
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.)
Sagem SA
Original Assignee
Sagem SA
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 Sagem SA filed Critical Sagem SA
Publication of GB0006723D0 publication Critical patent/GB0006723D0/en
Publication of GB2350754A publication Critical patent/GB2350754A/en
Application granted granted Critical
Publication of GB2350754B publication Critical patent/GB2350754B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0287—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level changing the clock frequency of a controller in the equipment
    • H04W52/029—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level changing the clock frequency of a controller in the equipment reducing the clock frequency of the controller
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

In order to reduce current consumption in a mobile telephone, a slow clock signal is used while the mobile is in a standby state. The circuit providing the slow clock signal is calibrated by the circuit providing the fast clock signal before it is deactivated. Data received from the network is used to determine a known period of time delta between a first date T<SB>0</SB> and second date T<SB>1</SB>. The number of time periods of the fast clock during one period of the slow clock N is determined. A value of the duration delta is divided by the number N and a number M is obtained, M comprises an integer part E and a decimal part D. m periods are counted with the fast clock signal, where m&lt;n with n equal to D x N, between the date T<SB>0</SB> and a first edge of the slow clock signal after the date T<SB>0</SB>. A value r of the remainder of the subtraction between m and n is stored in the data memory of the mobile. The mobile is then placed in a standby state, E periods are counted with the slow clock signal, r periods are counted with a fast clock signal. The mobile is subsequently placed in an active state.
GB0006723A 1999-03-18 2000-03-20 Method of standby operation in a mobile telephone Expired - Lifetime GB2350754B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9903385A FR2791217B1 (en) 1999-03-18 1999-03-18 SLEEPING PROCESS IN A MOBILE TELEPHONE

Publications (3)

Publication Number Publication Date
GB0006723D0 GB0006723D0 (en) 2000-05-10
GB2350754A GB2350754A (en) 2000-12-06
GB2350754B true GB2350754B (en) 2003-12-24

Family

ID=9543354

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0006723A Expired - Lifetime GB2350754B (en) 1999-03-18 2000-03-20 Method of standby operation in a mobile telephone

Country Status (3)

Country Link
DE (1) DE10012635C2 (en)
FR (1) FR2791217B1 (en)
GB (1) GB2350754B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100675450B1 (en) * 2000-12-07 2007-01-26 콸콤 인코포레이티드 Method and apparatus for compensating for frequency drift in a low frequency sleep clock within a mobile station operating in a slotted paging mode
WO2003021453A2 (en) 2001-08-29 2003-03-13 Analog Devices, Inc. Generic serial port architecture and system
US7463910B2 (en) 2005-03-10 2008-12-09 Qualcomm Incorporated Apparatus and method for determining sleep clock timing
GB2426148A (en) * 2005-04-20 2006-11-15 Nokia Corp Hand held portable device having a plurality of modes of operation
US7529531B2 (en) 2005-11-09 2009-05-05 Qualcomm, Incorporated Apparatus and methods for estimating a sleep clock frequency

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0586256A2 (en) * 1992-09-04 1994-03-09 Nokia Mobile Phones Ltd. Time measurement system
GB2320398A (en) * 1996-12-12 1998-06-17 Nec Technologies Time Base Alignment for Digital Mobile Phones
EP0865167A2 (en) * 1997-03-11 1998-09-16 Lucent Technologies Inc. Power saving scheme for a digital wireless communications terminal

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI96656C (en) * 1992-11-27 1996-07-25 Nokia Telecommunications Oy radio system
GB2297884B (en) * 1995-02-07 1999-05-26 Nokia Mobile Phones Ltd Radio telephone
GB2315194B (en) * 1996-07-11 2000-11-15 Nokia Mobile Phones Ltd Method and apparatus for resynchronizing two system clocks
US6016312A (en) * 1997-02-28 2000-01-18 Motorola, Inc. Radiotelephone and method for clock calibration for slotted paging mode in a CDMA radiotelephone system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0586256A2 (en) * 1992-09-04 1994-03-09 Nokia Mobile Phones Ltd. Time measurement system
GB2320398A (en) * 1996-12-12 1998-06-17 Nec Technologies Time Base Alignment for Digital Mobile Phones
EP0865167A2 (en) * 1997-03-11 1998-09-16 Lucent Technologies Inc. Power saving scheme for a digital wireless communications terminal

Also Published As

Publication number Publication date
FR2791217A1 (en) 2000-09-22
FR2791217B1 (en) 2001-06-01
DE10012635A1 (en) 2000-10-12
GB2350754A (en) 2000-12-06
GB0006723D0 (en) 2000-05-10
DE10012635C2 (en) 2002-11-14

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20120426 AND 20120502

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20120503 AND 20120509

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20180920 AND 20180926

PE20 Patent expired after termination of 20 years

Expiry date: 20200319