WO2005060358A2 - Dispositif et procede servant a economiser de la puissance dans une station d'abonne - Google Patents

Dispositif et procede servant a economiser de la puissance dans une station d'abonne Download PDF

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Publication number
WO2005060358A2
WO2005060358A2 PCT/KR2004/002444 KR2004002444W WO2005060358A2 WO 2005060358 A2 WO2005060358 A2 WO 2005060358A2 KR 2004002444 W KR2004002444 W KR 2004002444W WO 2005060358 A2 WO2005060358 A2 WO 2005060358A2
Authority
WO
WIPO (PCT)
Prior art keywords
station
sibscriber
sleep mode
initial ranging
base station
Prior art date
Application number
PCT/KR2004/002444
Other languages
English (en)
Other versions
WO2005060358A3 (fr
Inventor
Yong-Seouk Choi
Nam-Hoon Park
Jee-Hwan Ahn
Nam Kim
Original Assignee
Electronics And Telecommunications Research Institute
Samsung Electronics Co., Ltd.
Kt Corporation
Sk Telecom Co., Ltd.
Ktfreetel Co., Ltd.
Hanaro Telecom, 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
Priority claimed from KR1020040027470A external-priority patent/KR20050063648A/ko
Application filed by Electronics And Telecommunications Research Institute, Samsung Electronics Co., Ltd., Kt Corporation, Sk Telecom Co., Ltd., Ktfreetel Co., Ltd., Hanaro Telecom, Inc. filed Critical Electronics And Telecommunications Research Institute
Publication of WO2005060358A2 publication Critical patent/WO2005060358A2/fr
Publication of WO2005060358A3 publication Critical patent/WO2005060358A3/fr

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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
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0241—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where no transmission is received, e.g. out of range of the transmitter
    • 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

  • the present invention relates to an apparatus and method for power saving in a sibscriber station based on the IEEE802.16. More specifically, the present invention relates to an apparatus and method for saving power in a sibscriber station to apply a sleep mode and save the power of the sibscriber station when an initial ranging process has failed.
  • a sibscriber station is convenient for hand-carrying according to the characteristics of mobile communication, and therefore many people use the sibscriber stations, and apparatuses compatible with notebook computer interfaces are tending to be light- weighted.
  • the initial ranging process is a process for controlling time synchronization between the sibscriber station and a base station, a delay according to a gap between each sibscriber station and base station, and controlling RF (Radio Frequency) output power of the sibscriber station.
  • the initial ranging process is started when the sibscriber station receives a DL/UL MAP message that is channel assignment information of Downlink/Uplink broadcasted by the base station and a DCD/UCD (Downlink Channel Descriptor/ Uplink Channel Descriptor), comprising information on an assigned channel itself, and it then transmits an RNG (ranging) request signal to the base station based on the above information.
  • a DL/UL MAP message that is channel assignment information of Downlink/Uplink broadcasted by the base station and a DCD/UCD (Downlink Channel Descriptor/ Uplink Channel Descriptor), comprising information on an assigned channel itself, and it then transmits an RNG (ranging) request signal to the base station based on the above information.
  • DCD/UCD Downlink Channel Descriptor/ Uplink Channel Descriptor
  • the sibscriber station mist receive a ranging response signal corresponding to the ranging request previously transmitted, and a succeeding process according to a failure of the initial ranging process is performed when the ranging response signal is not received.
  • the output is increased at a predetermined rate every time the initial ranging process is repeated, and the initial ranging process is performed repeatedly after a predetermined time for a backoff process to be passed in the case of the continued failures of the initial ranging process.
  • the present invention applies the sleep mode for turning off the sibscriber station to save the power of the sibscriber station when the initial ranging process between the sibscriber station and a base station has failed.
  • a method for saving power in a sibscriber station when the sibscriber station is accessed to the base station in an initial ranging process comprises a) the sibscriber station receiving channel assignment information and channel information assigned by the channel assignment information from the base station when the initial ranging process is performed; b) the sibscriber station transmitting a first ranging request signal and standing by for receiving a response signal to the first ranging request signal from the base station; c) the sibscriber station performing the initial ranging process when the sibscriber station fails to receive the response signal from the base station for a predetermined time; d) the sibscriber applying a sleep mode, entering into an awake mode, and then performing the initial ranging process when the initial ranging process of c) has failed after the initial ranging process is attempted a predetermined number of times; and e) the sibscriber station performing the initial ranging process successfully when the sibscriber station receives the response signal from the base station in c) or
  • d) maintains the sleep mode during a first sleep mode interval and enters into the awake mode; and maintains a second sleep mode interval twice as long as the first sleep mode interval when the initial ranging has failed and a second sleep mode is performed.
  • d) turns off the internal components of the sibscriber station in the sleep mode condition, and turns on part of the sibscriber station internal components which use the receive sensitivity of the broadcasting signal of the base station to measure a radio environment when the awake mode is performed.
  • the internal components of the sibscriber station are turned on to perform the initial ranging process when the radio environment measured by the sibscriber station is above a reference value, all the internal components of the sibscriber station which are turned on are turned off and the sibscriber station enters into the sleep mode when the radio environment measured by the sibscriber station is below the reference value.
  • an apparatus for saving power in a sibscriber station when the sibscriber station is accessed to a base station in an initial ranging process comprises an RF (radio frequency) processor for processing radio signals transmitted and received by the base station; a modem unit for modulating and demodulating signals input and output by the RF processor; a channel codec unit for performing a coding function and error processing function for respective channels of signal input and output to/from the RF processor; a voice and video codec unit for receiving and processing voice and video signals of users, restoring voice and video data transmitted through the base station and outputting restored data; and a central controller for controlling control functions of the sibscriber station, performing a switching function to a sleep mode and an awake mode according to success or failure of the initial ranging process, and controlling turning on/off operations of the units.
  • RF radio frequency
  • the central controller turns off the RF processor, the modem unit, the channel codec unit, and the voice and video codec unit when the sibscriber station enters the sleep mode; and turns on only the RF processor and a demodulation function of the modem unit, measuring the current radio state when the sibscriber enters into the awake mode from the sleep mode after a predetermined time has passed.
  • FIG. 1 shows a block diagram of a configuration of an apparatus for saving power in a sibscriber station according to an exemplary embodiment of the present invention
  • FIG. 2 shows a flowchart of a method for saving power in a sibscriber station according to an exemplary embodiment of the present invention
  • FIG. 3 shows an example of power-saving according to the performance as shown in FIG. 2. Best Mode for Carrying Out the Invention
  • FIG. 1 shows a block diagram of a configuration of the apparatus for saving power in the sibscriber station according to the exemplary embodiment of the present invention.
  • the apparatus for saving power in the sibscriber station comprises an RF (radio frequency) processor 10, a modem (Modulator/Demodulator) unit 20, a channel codec unit 30, a voice and video codec unit 40, and a central controller 50.
  • RF radio frequency
  • modem Modem/Demodulator
  • channel codec channel codec
  • voice and video codec voice and video codec unit 40
  • the RF processor 10 transmits and receives radio signals, and the modem unit 20 modulates and demodulates signals that are transmitted and received by the RF processor 10.
  • the channel codec unit 30 performs a coding function and processes various errors for each channel, and the voice and video codec unit 40 transmits voice and video signals to the central controller 50 when the voice and the video signals are input, and the voice and video code unit 40 restores and then outputs the voice and the video data provided from the central controller 50.
  • the central controller 50 is a main control board for controlling functions of the sibscriber station, which processes the signals input and output by the modem unit 20 and the voice and video codec unit 40.
  • FIG. 2 shows a flowchart of a method for saving power in the sibscriber station according to the exemplary embodiment of the present invention
  • FIG. 3 shows an example of power saving in the sibscriber station according to the exemplary embodiment of the present invention.
  • the sibscriber station (SS) receives DL/UL (Downlink/Uplink) MAP information that is channel assignment information on DL/ UL from a base station (BS) for an initial ranging process.
  • DL/UL Downlink/Uplink
  • BS base station
  • the base station receives a DCD/UCD (Downlink channel Descriptor/uplink channel Descriptor) comprising channel information assigned to DL/UL MAP information.
  • DCD/UCD Downlink channel Descriptor/uplink channel Descriptor
  • the sibscriber station then transmits a ranging request signal (RNG-REQ) that is a first ranging signal to the base station, and stands by for receiving a ranging response signal (RNG-RSP) corresponding to the ranging request signal.
  • RNG-REQ ranging request signal
  • RNG-RSP ranging response signal
  • the sibscriber station successfully performs the initial ranging process when receiving the ranging response signal and it does not repeat the initial ranging process immediately but enters a sleep mode, and then it undergoes an awake mode to thus perform the initial ranging process when the initial ranging process has failed.
  • the base station fails to receive the first ranging signal from the sibscriber station, or the sibscriber station fails to receive the response signal from the base station although the base station has succeeded in receiving the first ranging signal and transmitted the response signal to the sibscriber station.
  • the sibscriber station when the sibscriber station repeats the initial ranging process, the sibscriber station increases the output and transmits the first ranging signal to the base station. At this time, the base station predetermines the number of times to repeat when the initial ranging process is repeated because of failures of the initial ranging process.
  • the sibscriber station determines a rate of successful initial ranging to be low and enters the sleep mode. At this time, a sleep mode interval maintaining the sleep mode is established.
  • the central controller turns off the RF processor 10, the modem unit 20, the channel codec unit 30, and the voice and video codec unit 40 in order to minimize power consumption.
  • the sibscriber station When the sleep mode has expired, the sibscriber station enters the awake mode, turns on the RF processor 10 and a demodulator of the modem unit 20, and scans whether the sibscriber station receives the DL/UL MAP signal comprising the DL/UL channel assignment information broadcasted by the base station.
  • the sibscriber station turns on a modulator of the modem unit 20 and transmits the first ranging request signal when the DL/UL MAP signal is received properly, and the sibscriber station turns off the RF processor 10 and the demodulator of the modem unit 20 which are turned on and returns to the sleep mode when the DL/ UL MAP signal is received inadequately.
  • the initial ranging process is performed a predetermined number of times in the above case. If the initial ranging process fails to be performed successfully in a predetermined number of times, the sibscriber station returns to the sleep mode.
  • the sibscriber station When the sibscriber station enters the sleep mode for the second time, the sibscriber station increases the sleep mode interval to twice the previous sleep mode interval and returns to the sleep mode.
  • the reason why the sleep mode interval is doubled upon at least two entries into the sleep mode is to prevent the power consumption according to the low probability of success of the initial ranging process in the present radio environment.
  • the turned-off sibscriber station is switched to be turned on or enters a new cell so as to perform the initial ranging process, it is not possible for the initial ranging process to be performed successfully in the RF interfered area or the shadow area. Therefore, the power consumption is minimized in the sleep mode.
  • the sibscriber station turns off the RF processor 10 and the demodulator which are turned on and enters the sleep mode.

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

Abstract

L'invention concerne un dispositif et un procédé servant à économiser de la puissance dans une station d'abonné. Ce dispositif et ce procédé sont basés sur le maintien d'un mode de sommeil pendant un intervalle prédéterminé, sur l'application d'un mode d'éveil et l'exécution d'une opération de mesure de distance initiale en cas d'échec de la mesure de distance initiale entre la station d'abonné et une station de base un nombre prédéterminé de fois et sur le maintien d'un intervalle de mode de sommeil égal à deux fois le premier intervalle de mode de sommeil, ainsi que sur l'application du mode d'éveil et l'exécution de l'opération de mesure de distance initiale en cas de deuxième échec de l'opération de mesure de distance initiale. Ceci permet de limiter au maximum la consommation de puissance associée à l'échec de l'opération de mesure de distance initiale.
PCT/KR2004/002444 2003-12-22 2004-09-23 Dispositif et procede servant a economiser de la puissance dans une station d'abonne WO2005060358A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20030095016 2003-12-22
KR10-2003-0095016 2003-12-22
KR10-2004-0027470 2004-04-21
KR1020040027470A KR20050063648A (ko) 2003-12-22 2004-04-21 이동 단말기에서의 전력절약 장치 및 그 방법

Publications (2)

Publication Number Publication Date
WO2005060358A2 true WO2005060358A2 (fr) 2005-07-07
WO2005060358A3 WO2005060358A3 (fr) 2006-02-09

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876846A2 (fr) * 2006-07-03 2008-01-09 Samsung Electronics Co., Ltd. Système et procédé pour la réalisation des mesures à distance périodiques en mode veille dans un système de communications
US8117477B2 (en) 2007-08-24 2012-02-14 Samsung Electronics Co., Ltd. Apparatus and method for entering idle mode in a broadband wireless access (BWA) system
CN107411177A (zh) * 2012-05-14 2017-12-01 尼科投资控股有限公司 电子蒸气提供装置
US11701482B2 (en) 2012-10-19 2023-07-18 Nicoventures Trading Limited Electronic inhalation device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106550442B (zh) * 2016-10-26 2019-11-26 中磊电子（苏州）有限公司 功率控制方法及无线收发器

Citations (1)

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Publication number Priority date Publication date Assignee Title
US6519449B1 (en) * 1999-10-29 2003-02-11 Nortel Networks Limited Method and apparatus for a signal power control in a wireless communication system

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US6519449B1 (en) * 1999-10-29 2003-02-11 Nortel Networks Limited Method and apparatus for a signal power control in a wireless communication system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IEEE 802.16 TASK GROUP E: 'Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems-Amendment for Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands' IEEE 802.16E-03/07R5,IEEE 802.16 TGE WORKING DOCUMENT, [Online] 09 December 2003, Retrieved from the Internet: <URL:http://www.ieee802.org/16/tge/docs/802 16E-03_07r5.zip> *
KITROSER I. ET AL: 'IEEE802.16e Sleep Mode' IEEE C802. 16E-03/15, IEEE 802.16 BROADBAND WIRELESS ACCESS WORKING GROUP, [Online] 06 March 2003, Retrieved from the Internet: <URL:http://www.ieee802.org/16/tge/contrib/ C80216e-03_15pdf> *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876846A2 (fr) * 2006-07-03 2008-01-09 Samsung Electronics Co., Ltd. Système et procédé pour la réalisation des mesures à distance périodiques en mode veille dans un système de communications
EP1876846A3 (fr) * 2006-07-03 2008-03-05 Samsung Electronics Co., Ltd. Système et procédé pour la réalisation des mesures à distance périodiques en mode veille dans un système de communications
US8054770B2 (en) 2006-07-03 2011-11-08 Samsung Electronics Co., Ltd System and method for performing periodic ranging in sleep mode in a communication system
US8117477B2 (en) 2007-08-24 2012-02-14 Samsung Electronics Co., Ltd. Apparatus and method for entering idle mode in a broadband wireless access (BWA) system
CN107411177A (zh) * 2012-05-14 2017-12-01 尼科投资控股有限公司 电子蒸气提供装置
US11185649B2 (en) 2012-05-14 2021-11-30 Nicoventures Trading Limited Electronic vapor provision device
US11931507B2 (en) 2012-05-14 2024-03-19 Nicoventures Trading Limited Electronic vapor provision device
US11701482B2 (en) 2012-10-19 2023-07-18 Nicoventures Trading Limited Electronic inhalation device

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