EP1340321A1 - Procede et dispositif permettant de corriger le glissement de frequence dans une horloge de mise en sommeil basse frequence equipant une station mobile fonctionnant en mode page par creneau - Google Patents

Procede et dispositif permettant de corriger le glissement de frequence dans une horloge de mise en sommeil basse frequence equipant une station mobile fonctionnant en mode page par creneau

Info

Publication number
EP1340321A1
EP1340321A1 EP00982520A EP00982520A EP1340321A1 EP 1340321 A1 EP1340321 A1 EP 1340321A1 EP 00982520 A EP00982520 A EP 00982520A EP 00982520 A EP00982520 A EP 00982520A EP 1340321 A1 EP1340321 A1 EP 1340321A1
Authority
EP
European Patent Office
Prior art keywords
sleep
period
counter
sub
fractional
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.)
Withdrawn
Application number
EP00982520A
Other languages
German (de)
English (en)
Inventor
Raghu Challa
Ihab Barghouti
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.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
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 Qualcomm Inc filed Critical Qualcomm Inc
Priority to EP04025921A priority Critical patent/EP1503506B1/fr
Priority to EP04025922A priority patent/EP1507333B1/fr
Publication of EP1340321A1 publication Critical patent/EP1340321A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • 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
    • 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

Definitions

  • CDMA Code Division Multiple Access
  • paging signals are transmitted from a base station to particular mobile stations only within assigned paging slots separated by predetermined intervals of time. Accordingly, each individual mobile station may remain within a sleep mode during the period of time between consecutive paging slots without risk of missed paging signals. Whether any particular mobile station may switch from an active-mode to a sleep mode depends, however, upon whether the mobile station is currently engaged in any user activity such as processing input commands entered by the user or processing a telephonic communication on behalf of the user.
  • the temperature change may be even more significant.
  • Typical low power, low frequency 2 5 clock signal generators are significantly affected by even relatively minor temperature changes and are even more strongly affected by such broad changes in temperature. Indeed, the amount of drift in a typical low power, low frequency clock signal is sufficiently great such that if used by itself to calculate the elapsed time, there is significant risk that the mobile station will not x be reactivated in time to power up components to detect a paging signal transmitted within a next paging slot. Accordingly, important paging signals maybe missed possibly resulting in missed phone calls and the like.
  • the fractional counter is initially set to 0 and hence, following step 120, the fractional counter is simply set to the fractional number of cycles remaining in the first catnap not accounted for by the integer number of cycles stored within the integer counter.
  • the mobile station accounts for any necessary wakeup time (or warm-up interval) required at the end of each catnap to allow the components of the mobile station to power up to detect whether any keys on the keypad have been pressed. Accordingly, at step 138, the mobile station determines the duration of the wakeup period in cycles of the sleep-mode clock then subtracts the wakeup period from the value currently held with an integer counter.
  • the length of the wake up period is predetermined and values representative of the length may be stored in appropriate memory registers. Note that any fractional portion of the wakeup period is not separately accounted for. In other implementations, the wakeup period can be divided into an integer portion and a fractional portion with the fractional portion subtracted from the fractional counter as well.
  • WU JTME counter is a precomputed constant specified by a RF hardware warm-up requirements.
  • the microprocessor goes back to sleep awaiting the wake-up interrupt from the next catnap.
  • the effective frequency of the slow clock F sc lies in the 30 - 60 kHz range, the exact value of which is specified by the subscriber station manufacturer. It is convenient to make the calibration independent of the exact sleep clock, hence the FEE is initially used to estimate the frequency of the slow clock every time the subscriber station is powered up.
  • FDC Fixed Drift Compensation
  • FIG. 5 is a functional block diagram of the feedback loop.
  • the calibration process described above is performed by a sleep calibration unit 200, which accepts the following four external inputs:
  • the sampled loop gains (a , , a 2 ) can be expressed in terms of the loop noise band-width Bj. and damping ratio ⁇ of an equivalent continuous time feedback loop given by:

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettant le suivi de la durée d'une période de sommeil dans une station mobile qui se sert d'une horloge de mise en sommeil pour étalonner de façon précise des tranches de mise en sommeil. Chaque tranche se sous-divise en une séquence de sous-tranches de durée fixe, les durées des sous-tranches n'étant pas systématiquement des multiples entiers de cycles de l'horloge de mise en sommeil. Le temps écoulé est suivi dans chaque sous-tranche de la tranche de mise en sommeil à l'aide d'un compteur de tranches de mise en sommeil entières, lequel compteur est conçu pour assurer le suivi de l'horloge de mise en sommeil par cycle entier. Ensuite, toutes les parties non entières qui n'ont pas été prises en compte par le compteur sont suivies à l'aide d'un compteur de tranches incomplètes. Ce compteur fait le cumul des tranches incomplètes restantes des cycles du mode de mise en sommeil d'une sous-tranche à l'autre. La présente invention concerne également un procédé et un dispositif permettant d'évaluer le glissement de la fréquence à l'aide d'un signal d'horloge de mise en sommeil utilisé pendant l'exploitation en mode page par créneau d'une station mobile sans fil. Une fréquence initiale du signal d'horloge de mise en sommeil est déterminée après la mise sous tension de la station mobile. Un facteur de correction du glissement de fréquence est ensuite déterminé, il représente un delta entre la fréquence initiale du signal d'horloge de mise en sommeil et une fréquence nominale. Un facteur de correction dynamique des erreurs de fréquence caractéristique du delta entre la fréquence initiale et une fréquence courante du signal d'horloge lent est estimé. Ensuite, pendant le mode d'exploitation par créneau, de nouvelles valeurs du facteur de correction dynamique de la fréquence sont déterminées de manière itérative au moyen d'un filtre à boucle.
EP00982520A 2000-12-07 2000-12-07 Procede et dispositif permettant de corriger le glissement de frequence dans une horloge de mise en sommeil basse frequence equipant une station mobile fonctionnant en mode page par creneau Withdrawn EP1340321A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04025921A EP1503506B1 (fr) 2000-12-07 2000-12-07 Procédé et appareil pour la surveillance de la durée d'une période de sommeil d'une station mobile
EP04025922A EP1507333B1 (fr) 2000-12-07 2000-12-07 Procédé et appareil pour la compensation du décalage de fréquence dans un signal d'horloge en sommeil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/033263 WO2002047281A1 (fr) 2000-12-07 2000-12-07 Procede et dispositif permettant de corriger le glissement de frequence dans une horloge de mise en sommeil basse frequence equipant une station mobile fonctionnant en mode page par creneau

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP04025922A Division EP1507333B1 (fr) 2000-12-07 2000-12-07 Procédé et appareil pour la compensation du décalage de fréquence dans un signal d'horloge en sommeil
EP04025921A Division EP1503506B1 (fr) 2000-12-07 2000-12-07 Procédé et appareil pour la surveillance de la durée d'une période de sommeil d'une station mobile

Publications (1)

Publication Number Publication Date
EP1340321A1 true EP1340321A1 (fr) 2003-09-03

Family

ID=21742050

Family Applications (3)

Application Number Title Priority Date Filing Date
EP00982520A Withdrawn EP1340321A1 (fr) 2000-12-07 2000-12-07 Procede et dispositif permettant de corriger le glissement de frequence dans une horloge de mise en sommeil basse frequence equipant une station mobile fonctionnant en mode page par creneau
EP04025922A Expired - Lifetime EP1507333B1 (fr) 2000-12-07 2000-12-07 Procédé et appareil pour la compensation du décalage de fréquence dans un signal d'horloge en sommeil
EP04025921A Expired - Lifetime EP1503506B1 (fr) 2000-12-07 2000-12-07 Procédé et appareil pour la surveillance de la durée d'une période de sommeil d'une station mobile

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP04025922A Expired - Lifetime EP1507333B1 (fr) 2000-12-07 2000-12-07 Procédé et appareil pour la compensation du décalage de fréquence dans un signal d'horloge en sommeil
EP04025921A Expired - Lifetime EP1503506B1 (fr) 2000-12-07 2000-12-07 Procédé et appareil pour la surveillance de la durée d'une période de sommeil d'une station mobile

Country Status (8)

Country Link
EP (3) EP1340321A1 (fr)
KR (1) KR100675450B1 (fr)
AT (2) ATE354212T1 (fr)
AU (1) AU2001219542A1 (fr)
ES (2) ES2278262T3 (fr)
HK (1) HK1074541A1 (fr)
MX (1) MXPA03005105A (fr)
WO (1) WO2002047281A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100606054B1 (ko) * 2005-01-04 2006-07-31 삼성전자주식회사 이동 통신 단말의 소모 전류 감소 장치 및 방법
US7463910B2 (en) 2005-03-10 2008-12-09 Qualcomm Incorporated Apparatus and method for determining sleep clock timing
US7529531B2 (en) 2005-11-09 2009-05-05 Qualcomm, Incorporated Apparatus and methods for estimating a sleep clock frequency
US20070232366A1 (en) * 2006-03-29 2007-10-04 Qualcomm Incorporated Method and system for power-efficient monitoring of wireless broadcast network
US7272078B1 (en) 2006-10-12 2007-09-18 Telefonaktiebolaget L M Ericsson (Publ) Efficient clock calibration in electronic equipment
US8031024B1 (en) 2008-02-28 2011-10-04 Marvell International Ltd. Temperature-corrected frequency control with crystal oscillators
US8451740B2 (en) 2008-04-01 2013-05-28 Qualcomm Incorporated Compensating for drifts occurring during sleep times in access terminals
US7881895B2 (en) 2008-05-27 2011-02-01 Sony Ericsson Mobile Communications Ab Methods of calibrating a clock using multiple clock periods with a single counter and related devices and methods
KR20110013687A (ko) 2009-08-03 2011-02-10 삼성모바일디스플레이주식회사 유기전계발광표시장치 및 그의 구동방법
US8731119B2 (en) 2011-03-18 2014-05-20 Marvell World Trade Ltd. Apparatus and method for reducing receiver frequency errors
US9289422B2 (en) 2011-03-24 2016-03-22 Marvell World Trade Ltd. Initial acquisition using crystal oscillator
US20130272455A1 (en) * 2012-04-13 2013-10-17 Qualcomm Incorporated Systems and methods for clock compensation
US9462489B2 (en) 2014-05-15 2016-10-04 Qualcomm Incorporated Using client-specific RGS to improve performance on multi-SIM and multi-RAT devices
US9872335B2 (en) 2015-03-06 2018-01-16 Marvell International Ltd. Iterative receiver wake-up for long DRX periods
US10333525B1 (en) 2015-12-07 2019-06-25 Marvell International Ltd. Digitally-based temperature compensation for a crystal oscillator
CN112162820A (zh) * 2020-09-23 2021-01-01 广州六环信息科技有限公司 计时器的计时方法和装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP0924947A1 (fr) * 1997-12-22 1999-06-23 The Technology Partnership Public Limited Company Réduction de consommation de puissance dans un terminal pour système cellulaire numérique
US6088602A (en) * 1998-03-27 2000-07-11 Lsi Logic Corporation High resolution frequency calibrator for sleep mode clock in wireless communications mobile station
FR2791217B1 (fr) * 1999-03-18 2001-06-01 Sagem Procede de veille dans un telephone mobile

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0247281A1 *

Also Published As

Publication number Publication date
KR100675450B1 (ko) 2007-01-26
ES2278262T3 (es) 2007-08-01
AU2001219542A1 (en) 2002-06-18
MXPA03005105A (es) 2004-05-24
EP1507333A1 (fr) 2005-02-16
ATE354212T1 (de) 2007-03-15
EP1503506B1 (fr) 2007-01-17
ATE352129T1 (de) 2007-02-15
EP1507333B1 (fr) 2007-02-14
KR20030065535A (ko) 2003-08-06
ES2280877T3 (es) 2007-09-16
EP1503506A1 (fr) 2005-02-02
HK1074541A1 (en) 2005-11-11
WO2002047281A1 (fr) 2002-06-13

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