CA2638956A1 - Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system - Google Patents

Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system Download PDF

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Publication number
CA2638956A1
CA2638956A1 CA002638956A CA2638956A CA2638956A1 CA 2638956 A1 CA2638956 A1 CA 2638956A1 CA 002638956 A CA002638956 A CA 002638956A CA 2638956 A CA2638956 A CA 2638956A CA 2638956 A1 CA2638956 A1 CA 2638956A1
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CA
Canada
Prior art keywords
frame
power control
forward link
mobile station
pair
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.)
Granted
Application number
CA002638956A
Other languages
French (fr)
Other versions
CA2638956C (en
Inventor
Tao Chen
Edward G. Tiedemann
Keith W. Saints
Olivier Glauser
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 Incorporated
Tao Chen
Edward G. Tiedemann
Keith W. Saints
Olivier Glauser
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22125532&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2638956(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Qualcomm Incorporated, Tao Chen, Edward G. Tiedemann, Keith W. Saints, Olivier Glauser filed Critical Qualcomm Incorporated
Priority claimed from CA2604069A external-priority patent/CA2604069C/en
Publication of CA2638956A1 publication Critical patent/CA2638956A1/en
Application granted granted Critical
Publication of CA2638956C publication Critical patent/CA2638956C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/06Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085Hand-off measurements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085Hand-off measurements
    • H04W36/0088Scheduling hand-off measurements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085Hand-off measurements
    • H04W36/0094Definition of hand-off measurement parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045Arrangements at the receiver end
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/06Reselecting a communication resource in the serving access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/14Reselecting a network or an air interface
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/34Reselection control
    • H04W36/38Reselection control by fixed network equipment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/44TPC being performed in particular situations in connection with interruption of transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices

Abstract

A method and apparatus for coordinating the time at which a mobile station (5) performs searches for alternative systems to which a hard handoff will occur. In one system which includes the present invention, the mobile station (5) receives a command which instructs the mobile station (5) as to when to tune to alternative frequencies in order to search for indications of the presence of an alternative system. In another system which includes the present invention, predetermined times are defined with respect to a reference point in time that is common to both an origination base station (10) and a mobile station (5).
The mobile station (5) tunes to alternative frequencies to perform searches only during these predetermined times. In addition, the mobile station (5) coordinates the transmission of reports which indicate the results of searches for alternative systems such that these reports are only transmitted from the mobile station (5) when the mobile station (5) is tuned to the origination frequency.

Claims (6)

1. A base station apparatus for minimizing loss of data in a communication link between a mobile station and a base station while searching for a suitable system with which a mobile assisted hard handoff will later be executed comprising:

a forward link power control mechanism for determining a forward link power control index;

a boost mode multiplier for increasing a relative output power level at which data is transferred during a portion of a current data frame to produce a boost mode data frame having a power level determined by the forward link power control index;

a data rate multiplier for increasing a data rate during a portion of a current data frame to produce a boost mode data frame having an increased data rate determined by a data rate multiplier;

a block interleaver for error correction coding of boost mode data frames;

a convolutional encoder for error correction coding of boost mode data frames;

a symbol repeater for creating symbol repetition in less than full rate boost mode data frames; and a multiplexer for controlling puncture of power control commands into boost mode data frames on a forward link channel.
2. The apparatus of claim 1 wherein the multiplexer for controlling puncture of power control commands on a forward link channel is configured to delay the puncturing of power control commands.
3. A method of boosting, at a base station, an output power level of a portion of a pair of data frames to ensure that an error correction code will be capable of determining information that is transmitted over a first frequency during the time a mobile station receiver is tuned to a second frequency comprising:

sending, from a base station to a mobile station, a message identifying an elected frame pair comprising a first frame and second frame;

increasing a forward link power control index;
transmitting a portion of the first frame of the identified elected frame pair at a power level determined by the increased forward link power control index;

interrupting forward link transmission during a second portion of the first frame of the elected frame pair and a first portion of the second frame of the elected frame pair;

transmitting a second portion of the second frame of the elected frame pair at a power level determined by the increased forward link power control index; and resetting the forward link power control index.
4. The method of claim 3 wherein the increasing the forward link power control index comprises disabling a power control subchannel.
5. The method of claim 3 or claim 4 wherein the resetting the forward link power control index comprises enabling a power control subchannel.
6. A method of boosting, at a base station, a data rate of a portion of a pair of data frames to ensure that an error correction code will be capable of determining information that is transmitted over a first frequency during the time a mobile station receiver is tuned to a second frequency comprising:

sending, from a base station to a mobile station, a message identifying an elected frame pair comprising a first frame and a second frame;

transmitting a portion of the first frame of the identified elected frame pair at an increased data rate determined by a data rate multiplier;

interrupting forward link transmission during a second portion of the first frame of the elected frame pair and a first portion of the second frame of the elected frame pair; and transmitting a second portion of the second frame of the elected frame pair at the increased data rate determined by the data rate multiplier.
CA2638956A 1998-05-07 1999-04-30 Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system Expired - Lifetime CA2638956C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US09/075,407 1998-05-07
US09/075,407 US6553064B1 (en) 1998-05-07 1998-05-07 Method and apparatus for performing mobile station assisted hard handoff using error correction codes
US09/082,499 1998-05-21
US09/082,499 US6535563B2 (en) 1998-05-07 1998-05-21 Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system
CA2604069A CA2604069C (en) 1998-05-07 1999-04-30 Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA2604069A Division CA2604069C (en) 1998-05-07 1999-04-30 Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system

Publications (2)

Publication Number Publication Date
CA2638956A1 true CA2638956A1 (en) 1999-11-11
CA2638956C CA2638956C (en) 2012-12-04

Family

ID=22125532

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2638956A Expired - Lifetime CA2638956C (en) 1998-05-07 1999-04-30 Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system

Country Status (10)

Country Link
US (3) US6553064B1 (en)
EP (4) EP1509057B2 (en)
JP (6) JP2009194917A (en)
KR (1) KR100691292B1 (en)
CN (1) CN101426250B (en)
AU (1) AU2009220021C1 (en)
BR (2) BR122013000252B1 (en)
CA (1) CA2638956C (en)
HK (1) HK1075997A1 (en)
RU (1) RU2000130729A (en)

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Also Published As

Publication number Publication date
EP2291027A1 (en) 2011-03-02
EP1509057A2 (en) 2005-02-23
JP2011142656A (en) 2011-07-21
JP5497106B2 (en) 2014-05-21
EP2291027B1 (en) 2013-06-26
US6788748B2 (en) 2004-09-07
RU2000130729A (en) 2002-11-27
JP2011259471A (en) 2011-12-22
EP1509057B2 (en) 2010-12-08
EP1509057A3 (en) 2006-07-26
JP2009194917A (en) 2009-08-27
EP1509058B1 (en) 2007-08-08
BR122013000252B1 (en) 2015-06-23
JP2012235479A (en) 2012-11-29
JP5044028B2 (en) 2012-10-10
US6535563B2 (en) 2003-03-18
KR100691292B1 (en) 2007-03-12
EP1830597A1 (en) 2007-09-05
CN101426250A (en) 2009-05-06
US6553064B1 (en) 2003-04-22
EP1509057B1 (en) 2007-07-25
AU2009220021A1 (en) 2009-10-15
JP5453357B2 (en) 2014-03-26
JP2011142657A (en) 2011-07-21
CN101426250B (en) 2015-08-19
JP4991962B2 (en) 2012-08-08
EP1509058A2 (en) 2005-02-23
US20030103580A1 (en) 2003-06-05
AU2009220021B2 (en) 2011-06-16
JP5102379B2 (en) 2012-12-19
US20010024482A1 (en) 2001-09-27
AU2009220021C1 (en) 2012-01-19
EP1509058A3 (en) 2006-07-26
CA2638956C (en) 2012-12-04
BR122013000251B8 (en) 2015-06-30
KR20010052310A (en) 2001-06-25
JP2012050098A (en) 2012-03-08
EP1830597B1 (en) 2016-08-31
HK1075997A1 (en) 2005-12-30
BR122013000251B1 (en) 2015-06-16

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