WO1990011652A1 - Dsp based radio with diminished power requirements - Google Patents

Dsp based radio with diminished power requirements Download PDF

Info

Publication number
WO1990011652A1
WO1990011652A1 PCT/US1990/001336 US9001336W WO9011652A1 WO 1990011652 A1 WO1990011652 A1 WO 1990011652A1 US 9001336 W US9001336 W US 9001336W WO 9011652 A1 WO9011652 A1 WO 9011652A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
power
signal processing
broadcast
amount
Prior art date
Application number
PCT/US1990/001336
Other languages
French (fr)
Inventor
Arun Sobti
Original Assignee
Motorola, 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 Motorola, Inc. filed Critical Motorola, Inc.
Priority to KR1019900702452A priority Critical patent/KR950000050B1/en
Publication of WO1990011652A1 publication Critical patent/WO1990011652A1/en

Links

Classifications

    • 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
    • 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
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/028—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks
    • H04W52/0283—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks with sequential power up or power down of successive circuit blocks, e.g. switching on the local oscillator before RF or mixer stages
    • 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
    • H04W52/0293—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 having a sub-controller with a low clock frequency switching on and off a main controller with a high clock frequency
    • 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

  • This invention relates generally to radios, and more particularly to radios that include a digital signal processor.
  • Radios generally function to receive broadcast signals. Usually, the user of a radio will not be interested in all of the signals that are broadcast on a communication resource (such as a particular frequency or a particular TDM time slot). Since many broadcast signals of interest include an identifying signal or other identifying indicia, many radios include a signal processor that examines the received broadcast signal to determine the presence of the identifying signal. If present, the radio can be further enabled to render the broadcast signal audible, visible, or otherwise as appropriate for that particular broadcast signal.
  • a communication resource such as a particular frequency or a particular TDM time slot.
  • radios remain squelched unless a carrier can be sensed on a particular monitored communication resource.
  • Other broadcast signals include special identifying signals, such as tone signals or subaudible digital signals, that the radio can recognize and respond to.
  • signals of interest can be prefaced with a specific identifying preamble, such as an ID for the intended radio.
  • DSPs digital signal processors
  • These processors typically receive digitized received signals. Further processing of the signal, equivalent to IF and discriminator processing, then occurs in the DSP in a digital manner. The resultant signal can then be converted into analog form and processed further as appropriate. For example, the resultant signal may be rendered audible in the case of a voice transmission.
  • DSPs consume a significant amount of power when operating. This becomes a particular problem when seeking to use a DSP in a portable radio with limited power resources. DSP power consumption becomes of particular concern when the DSP operates both in the presence and absence of a broadcast signal of interest. Typically, the DSP must operate even in the absence of a broadcast signal of interest because the DSP itself aids in detecting the presence of a broadcast signal of interest. Unless the broadcast signals of Interest occur at known times, the DSP must remain active in order to detect the signal when it occurs.
  • This invention allows a DSP to be used in a radio while avoiding the necessity of continuous DSP operation.
  • the invention includes generally two signal processing units; the first includes the DSP and the second includes a processing unit having lesser capabilities and smaller power requirements.
  • the DSP based signal processing unit functions to fully process broadcast signals of interest.
  • the low power processing unit functions to detect the presence of a broadcast signal of interest, and upon detecting such a signal, the low power processing unit enables the DSP based processing unit to begin functioning.
  • the high power requirements of the DSP based processing unit are necessitated only when a broadcast signal of interest exists. Otherwise, a lower power broadcast signal of interest detection mechanism monitors the communication resource.
  • Fig. 1 comprises a block diagram depiction of the invention
  • Fig. 2 comprises a block diagram depiction of the low power signal processing unit.
  • a radio includes generally an antenna (101) for receiving broadcast signals and an RF unit (102) for appropriately processing the received broadcast signals.
  • the received signals are then passed to a low power signal processing unit (106) and also through an appropriate gate (103) to a digital signal processing unit (104) (the latter typically including a DSP such as the Motorola 56000 and a microprocessor to control the DSP).
  • a digital signal processing unit (104) typically including a DSP such as the Motorola 56000 and a microprocessor to control the DSP.
  • the output of the digital signal processing unit (104) then couples to an appropriate amplifier (107) and speaker (108) or other output devices as appropriate to the type of message received.
  • the low power signal processing unit (106) includes an appropriate IF unit (201) for receiving the output signal from the RF unit (102), a discriminator (202) for processing the IF unit (201) output to aid in recovering the original modulating signal, and a processing unit (203) for examining the recovered signal and determining whether an appropriate identifying signal is present.
  • the processing unit (203) could be any relatively simple and low power device, such as a Motorola MC6303 processor.
  • the processing unit (203) of the low power signal processing unit Upon detecting the presence of a broadcast signal of interest, the processing unit (203) of the low power signal processing unit provides a signal to the gate (103), thereby allowing the RF signal to be provided to the digital signal processing unit (104). At the same time, the processing unit (203) provides an enable signal to the digital signal processing unit (104) to activate that unit and cause it to begin processing the incoming signal. So configured, the digital signal processing unit will operate only when a broadcast signal of interest can be detected. Otherwise, the low power signal processing unit will monitor the received broadcast signals and control the activation of the digital signal processing unit as a function of the presence and absence of a broadcast signal of interest.

Abstract

A radio (100) having two signal processing paths, one including a digital signal processor (104) that consumes a relatively large amount of power and one including a signal processor (106) that consumes a relatively small amount of power. The low power processor (106) operates to monitor for broadcast signals of interest. Upon detecting such a signal, the low power processor (106) enables the digital signal processor (104) to facilitate proper signal processing.

Description

DSP BASED RADIO WITH DIMINISHED POWER REQUIREMENTS
Technical Field
This invention relates generally to radios, and more particularly to radios that include a digital signal processor.
Bac grouπd Art
Radios generally function to receive broadcast signals. Usually, the user of a radio will not be interested in all of the signals that are broadcast on a communication resource (such as a particular frequency or a particular TDM time slot). Since many broadcast signals of interest include an identifying signal or other identifying indicia, many radios include a signal processor that examines the received broadcast signal to determine the presence of the identifying signal. If present, the radio can be further enabled to render the broadcast signal audible, visible, or otherwise as appropriate for that particular broadcast signal.
For example, some radios remain squelched unless a carrier can be sensed on a particular monitored communication resource. Other broadcast signals include special identifying signals, such as tone signals or subaudible digital signals, that the radio can recognize and respond to. Yet other signals of interest can be prefaced with a specific identifying preamble, such as an ID for the intended radio.
In order to expand the capabilities and flexibility of radios, digitizers and digital signal processors (DSPs) have been used. These processors typically receive digitized received signals. Further processing of the signal, equivalent to IF and discriminator processing, then occurs in the DSP in a digital manner. The resultant signal can then be converted into analog form and processed further as appropriate. For example, the resultant signal may be rendered audible in the case of a voice transmission.
DSPs, however, consume a significant amount of power when operating. This becomes a particular problem when seeking to use a DSP in a portable radio with limited power resources. DSP power consumption becomes of particular concern when the DSP operates both in the presence and absence of a broadcast signal of interest. Typically, the DSP must operate even in the absence of a broadcast signal of interest because the DSP itself aids in detecting the presence of a broadcast signal of interest. Unless the broadcast signals of Interest occur at known times, the DSP must remain active in order to detect the signal when it occurs.
Summary of the Invention:
This invention allows a DSP to be used in a radio while avoiding the necessity of continuous DSP operation.
The invention includes generally two signal processing units; the first includes the DSP and the second includes a processing unit having lesser capabilities and smaller power requirements. The DSP based signal processing unit functions to fully process broadcast signals of interest. The low power processing unit functions to detect the presence of a broadcast signal of interest, and upon detecting such a signal, the low power processing unit enables the DSP based processing unit to begin functioning.
Through use of this invention, the high power requirements of the DSP based processing unit are necessitated only when a broadcast signal of interest exists. Otherwise, a lower power broadcast signal of interest detection mechanism monitors the communication resource.
Brief Description of the Drawings:
Fig. 1 comprises a block diagram depiction of the invention; Fig. 2 comprises a block diagram depiction of the low power signal processing unit.
Best Mode for Carrying out the Invention:
Referring to Fig. 1, a radio (100) includes generally an antenna (101) for receiving broadcast signals and an RF unit (102) for appropriately processing the received broadcast signals. The received signals are then passed to a low power signal processing unit (106) and also through an appropriate gate (103) to a digital signal processing unit (104) (the latter typically including a DSP such as the Motorola 56000 and a microprocessor to control the DSP). The output of the digital signal processing unit (104) then couples to an appropriate amplifier (107) and speaker (108) or other output devices as appropriate to the type of message received.
With reference to Fig. 2, the low power signal processing unit (106) includes an appropriate IF unit (201) for receiving the output signal from the RF unit (102), a discriminator (202) for processing the IF unit (201) output to aid in recovering the original modulating signal, and a processing unit (203) for examining the recovered signal and determining whether an appropriate identifying signal is present. The processing unit (203) could be any relatively simple and low power device, such as a Motorola MC6303 processor.
Upon detecting the presence of a broadcast signal of interest, the processing unit (203) of the low power signal processing unit provides a signal to the gate (103), thereby allowing the RF signal to be provided to the digital signal processing unit (104). At the same time, the processing unit (203) provides an enable signal to the digital signal processing unit (104) to activate that unit and cause it to begin processing the incoming signal. So configured, the digital signal processing unit will operate only when a broadcast signal of interest can be detected. Otherwise, the low power signal processing unit will monitor the received broadcast signals and control the activation of the digital signal processing unit as a function of the presence and absence of a broadcast signal of interest.

Claims

I claim:
1 ) A radio having signal receiving means for receiving broadcast signals, and digital signal processing means that requires a first amount of power to operate for converting the received broadcast signal into a first signal, characterized by: A) switch means: responsive to a control signal; and being operably coupled between the signal receiving means and the digital signal processing means; for selectively allowing the broadcast signal as received by the signal receiving means to be provided to the digital signal processing means;
B) low power signal processing means: operably coupled to the signal receiving means; and requiring a second amount of power, said second amount of power being less than the first amount of power; for detecting a broadcast signal of interest and providing a control signal to the switch means in response thereto.
2) A radio having signal receiving means for receiving broadcast signals, and digital signal processing means that requires a first amount of power to operate for converting the received broadcast signal into a first signal, characterized by low power signal processing means: operably coupled to the signal receiving means; and requiring a second amount of power, said second amount of power being less than the first amount of power; for detecting a broadcast signal of interest and providing a control signal to the digital signal processing means to substantially control power consumption of the digital signal processing means.
PCT/US1990/001336 1989-03-20 1990-03-13 Dsp based radio with diminished power requirements WO1990011652A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900702452A KR950000050B1 (en) 1989-03-20 1990-03-13 Dsp based radio

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32560389A 1989-03-20 1989-03-20
US325,603 1989-03-20

Publications (1)

Publication Number Publication Date
WO1990011652A1 true WO1990011652A1 (en) 1990-10-04

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ID=23268578

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1990/001336 WO1990011652A1 (en) 1989-03-20 1990-03-13 Dsp based radio with diminished power requirements

Country Status (5)

Country Link
EP (1) EP0463104A4 (en)
JP (1) JPH04504340A (en)
KR (1) KR950000050B1 (en)
CA (1) CA2045519C (en)
WO (1) WO1990011652A1 (en)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230077A (en) * 1989-08-25 1993-07-20 Telefonaktiebolaget L M Ericsson Method of reducing the power requirements in a mobile radio receiver
EP0655872A2 (en) * 1993-11-26 1995-05-31 Nokia Mobile Phones Ltd. Paging message processing
GB2284728A (en) * 1993-12-10 1995-06-14 Motorola Inc Low power, addressable data communications device
EP0820153A2 (en) * 1996-06-18 1998-01-21 Nec Corporation Radio selective calling receiver
US5790946A (en) * 1993-07-15 1998-08-04 Rotzoll; Robert R. Wake up device for a communications system
EP0939495A1 (en) * 1998-02-26 1999-09-01 Motorola Semiconducteurs S.A. Power saving for a electronic devices
WO2000019622A1 (en) * 1998-09-28 2000-04-06 Sony Computer Entertainment Inc. Method and apparatus for transceiving, receiving as well as transmitting
US6389291B1 (en) 2000-08-14 2002-05-14 Sirf Technology Multi-mode global positioning system for use with wireless networks
US6462708B1 (en) 2001-04-05 2002-10-08 Sirf Technology, Inc. GPS-based positioning system for mobile GPS terminals
US6466161B2 (en) 2000-08-24 2002-10-15 Sirf Technology, Inc. Location services system that reduces auto-correlation or cross-correlation in weak signals
US6480150B2 (en) 1999-09-17 2002-11-12 Sirf Technology, Inc. Autonomous hardwired tracking loop coprocessor for GPS and WAAS receiver
US6542823B2 (en) 2000-08-14 2003-04-01 Sirf Technology, Inc. Information transfer in a multi-mode global positioning system used with wireless networks
US6671620B1 (en) 2000-05-18 2003-12-30 Sirf Technology, Inc. Method and apparatus for determining global position using almanac information
US6680703B1 (en) 2001-02-16 2004-01-20 Sirf Technology, Inc. Method and apparatus for optimally tuning a circularly polarized patch antenna after installation
US6703971B2 (en) 2001-02-21 2004-03-09 Sirf Technologies, Inc. Mode determination for mobile GPS terminals
US7047023B1 (en) 2000-12-01 2006-05-16 Sirf Technology, Inc. GPS RF front end IC with frequency plan for improved integrability
US7076256B1 (en) 2001-04-16 2006-07-11 Sirf Technology, Inc. Method and apparatus for transmitting position data using control channels in wireless networks
US7092369B2 (en) 1995-11-17 2006-08-15 Symbol Technologies, Inc. Communications network with wireless gateways for mobile terminal access
US7113552B1 (en) 2000-12-21 2006-09-26 Sirf Technology, Inc. Phase sampling techniques using amplitude bits for digital receivers
EP1772977A2 (en) * 2005-10-06 2007-04-11 Broadcom Corporation Mobile communication device with low power signal detector
WO2008040206A1 (en) 2006-09-06 2008-04-10 China Mobile Communications Corporation Saving electricity information home electric network and saving electricity controlling method
US7747236B1 (en) 2000-12-11 2010-06-29 Sirf Technology, Inc. Method and apparatus for estimating local oscillator frequency for GPS receivers
US7877104B2 (en) 2001-05-21 2011-01-25 Sirf Technology Inc. Method for synchronizing a radio network using end user radio terminals
US7925210B2 (en) 2001-05-21 2011-04-12 Sirf Technology, Inc. Synchronizing a radio network with end user radio terminals
WO2012067968A1 (en) * 2010-11-15 2012-05-24 Qualcomm Incorporated Power conservation in wireless access terminals using integrated proxy function
US8947300B2 (en) 2003-09-02 2015-02-03 Csr Technology Inc. Control and features for satellite positioning system receivers

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JPS61240719A (en) * 1985-04-18 1986-10-27 Nec Corp Receiver
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Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230077A (en) * 1989-08-25 1993-07-20 Telefonaktiebolaget L M Ericsson Method of reducing the power requirements in a mobile radio receiver
US5790946A (en) * 1993-07-15 1998-08-04 Rotzoll; Robert R. Wake up device for a communications system
US7142838B2 (en) 1993-07-15 2006-11-28 Micron Technology, Inc. Wake up device for a communications system
US7912442B2 (en) 1993-07-15 2011-03-22 Round Rock Research, Llc Wake up device for communications system
US7912443B2 (en) 1993-07-15 2011-03-22 Round Rock Research, Llc Wake up device for communications system and methods
US6760578B2 (en) 1993-07-15 2004-07-06 Micron Technology, Inc. Wake up device for a communications system
US8565712B2 (en) 1993-07-15 2013-10-22 Round Rock Research, Llc Wake up device for communications system and methods
EP0655872A3 (en) * 1993-11-26 1997-12-29 Nokia Mobile Phones Ltd. Paging message processing
EP0655872A2 (en) * 1993-11-26 1995-05-31 Nokia Mobile Phones Ltd. Paging message processing
GB2284728B (en) * 1993-12-10 1998-03-04 Motorola Inc Low power addressable data communication device and method
US5606313A (en) * 1993-12-10 1997-02-25 Motorola, Inc. Low power addressable data communication device and method
GB2284728A (en) * 1993-12-10 1995-06-14 Motorola Inc Low power, addressable data communications device
US7092369B2 (en) 1995-11-17 2006-08-15 Symbol Technologies, Inc. Communications network with wireless gateways for mobile terminal access
EP0820153A3 (en) * 1996-06-18 2000-12-06 Nec Corporation Radio selective calling receiver
EP0820153A2 (en) * 1996-06-18 1998-01-21 Nec Corporation Radio selective calling receiver
EP0939495A1 (en) * 1998-02-26 1999-09-01 Motorola Semiconducteurs S.A. Power saving for a electronic devices
WO2000019622A1 (en) * 1998-09-28 2000-04-06 Sony Computer Entertainment Inc. Method and apparatus for transceiving, receiving as well as transmitting
US6480150B2 (en) 1999-09-17 2002-11-12 Sirf Technology, Inc. Autonomous hardwired tracking loop coprocessor for GPS and WAAS receiver
US6671620B1 (en) 2000-05-18 2003-12-30 Sirf Technology, Inc. Method and apparatus for determining global position using almanac information
US6389291B1 (en) 2000-08-14 2002-05-14 Sirf Technology Multi-mode global positioning system for use with wireless networks
US6519466B2 (en) 2000-08-14 2003-02-11 Sirf Technology, Inc. Multi-mode global positioning system for use with wireless networks
US6542823B2 (en) 2000-08-14 2003-04-01 Sirf Technology, Inc. Information transfer in a multi-mode global positioning system used with wireless networks
US7197305B2 (en) 2000-08-24 2007-03-27 Sirf Technology, Inc. Apparatus for reducing auto-correlation or cross-correlation in weak CDMA signals
US6707423B2 (en) 2000-08-24 2004-03-16 Sirf Technology, Inc. Location services system that reduces auto-correlation or cross-correlation in weak signals
US6466161B2 (en) 2000-08-24 2002-10-15 Sirf Technology, Inc. Location services system that reduces auto-correlation or cross-correlation in weak signals
US6680695B2 (en) 2000-08-24 2004-01-20 Sirf Technology, Inc. Communications system that reduces auto-correlation or cross-correlation in weak signals
US7047023B1 (en) 2000-12-01 2006-05-16 Sirf Technology, Inc. GPS RF front end IC with frequency plan for improved integrability
US7747236B1 (en) 2000-12-11 2010-06-29 Sirf Technology, Inc. Method and apparatus for estimating local oscillator frequency for GPS receivers
US7113552B1 (en) 2000-12-21 2006-09-26 Sirf Technology, Inc. Phase sampling techniques using amplitude bits for digital receivers
US6680703B1 (en) 2001-02-16 2004-01-20 Sirf Technology, Inc. Method and apparatus for optimally tuning a circularly polarized patch antenna after installation
US6703971B2 (en) 2001-02-21 2004-03-09 Sirf Technologies, Inc. Mode determination for mobile GPS terminals
US6462708B1 (en) 2001-04-05 2002-10-08 Sirf Technology, Inc. GPS-based positioning system for mobile GPS terminals
US7986952B2 (en) 2001-04-16 2011-07-26 Sirf Technology Inc. Method and apparatus for transmitting position data using control channels in wireless networks
US7076256B1 (en) 2001-04-16 2006-07-11 Sirf Technology, Inc. Method and apparatus for transmitting position data using control channels in wireless networks
US7925210B2 (en) 2001-05-21 2011-04-12 Sirf Technology, Inc. Synchronizing a radio network with end user radio terminals
US7877104B2 (en) 2001-05-21 2011-01-25 Sirf Technology Inc. Method for synchronizing a radio network using end user radio terminals
US8947300B2 (en) 2003-09-02 2015-02-03 Csr Technology Inc. Control and features for satellite positioning system receivers
US9869770B2 (en) 2003-09-02 2018-01-16 Qualcomm Incorporated Control and features for satellite positioning system receivers
EP1772977A3 (en) * 2005-10-06 2010-11-24 Broadcom Corporation Mobile communication device with low power signal detector
US8532718B2 (en) 2005-10-06 2013-09-10 Broadcom Corporation Mobile communication device with low power signal detector
EP1772977A2 (en) * 2005-10-06 2007-04-11 Broadcom Corporation Mobile communication device with low power signal detector
US8892177B2 (en) 2005-10-06 2014-11-18 Broadcom Corporation Mobile communication device with low power signal detector
EP2056530A4 (en) * 2006-09-06 2009-10-14 China Mobile Comm Corp Saving electricity information home electric network and saving electricity controlling method
EP2056530A1 (en) * 2006-09-06 2009-05-06 China Mobile Communications Corporation Saving electricity information home electric network and saving electricity controlling method
WO2008040206A1 (en) 2006-09-06 2008-04-10 China Mobile Communications Corporation Saving electricity information home electric network and saving electricity controlling method
WO2012067968A1 (en) * 2010-11-15 2012-05-24 Qualcomm Incorporated Power conservation in wireless access terminals using integrated proxy function
US8442475B2 (en) 2010-11-15 2013-05-14 Qualcomm Incorporated Power conservation in wireless access terminals using integrated proxy function

Also Published As

Publication number Publication date
KR920700497A (en) 1992-02-19
EP0463104A4 (en) 1993-01-13
CA2045519A1 (en) 1990-09-21
EP0463104A1 (en) 1992-01-02
KR950000050B1 (en) 1995-01-07
CA2045519C (en) 1994-11-08
JPH04504340A (en) 1992-07-30

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