CA2372564A1 - Method and apparatus for soft handoff communications in a communication system operating according to multiple communication standards - Google Patents

Method and apparatus for soft handoff communications in a communication system operating according to multiple communication standards Download PDF

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Publication number
CA2372564A1
CA2372564A1 CA002372564A CA2372564A CA2372564A1 CA 2372564 A1 CA2372564 A1 CA 2372564A1 CA 002372564 A CA002372564 A CA 002372564A CA 2372564 A CA2372564 A CA 2372564A CA 2372564 A1 CA2372564 A1 CA 2372564A1
Authority
CA
Canada
Prior art keywords
soft handoff
signal
pilot
system operating
operating according
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
CA002372564A
Other languages
French (fr)
Other versions
CA2372564C (en
Inventor
Louay Jalloul
Keith A. Tenbrook
Jiangnan Chen
Ron Rotstein
Yuda Yehuda Luz
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.)
Google Technology Holdings LLC
Original Assignee
Motorola, Inc.
Louay Jalloul
Keith A. Tenbrook
Jiangnan Chen
Ron Rotstein
Yuda Yehuda Luz
Motorola Mobility, Inc.
Motorola Mobility Llc
Google Technology Holdings LLC
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., Louay Jalloul, Keith A. Tenbrook, Jiangnan Chen, Ron Rotstein, Yuda Yehuda Luz, Motorola Mobility, Inc., Motorola Mobility Llc, Google Technology Holdings LLC filed Critical Motorola, Inc.
Publication of CA2372564A1 publication Critical patent/CA2372564A1/en
Application granted granted Critical
Publication of CA2372564C publication Critical patent/CA2372564C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality

Abstract

A soft handoff operation is provided for a first signal transmitted according to a first communication standard (IS-95B) and a second signal transmitted according to a second communication standard (IS-95C). A mobile station (MS) (204) receives the first signal, detects a pilot signal, measures pilot signal strength, and transmits a pilot strength measurement message.
When the MS fails to receive a handoff direction message after transmitting the pilot strength message, the MS searches for a detecting presence of a broadcast control channel (BCCH) associated with a type IS-95C cell site (202) and measures a carrier-to-interference ratio of the BCCH. The MS compares the carrier-to-interference ratio to a threshold, and when the ratio is above the threshold, initiates a second communication according to the IS-95C standard, thus initiating a soft handoff operation and allowing cell sites (202, 203) to transmit information according to the IS-95C and IS-95B standards, respectively.
CA002372564A 2000-04-07 2001-03-30 Method and apparatus for soft handoff communications in a communication system operating according to multiple communication standards Expired - Fee Related CA2372564C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/545,125 US6768908B1 (en) 2000-04-07 2000-04-07 Method and apparatus for soft handoff communications in a communication system operating according to IS-95B and IS-95C standards
US09/545,125 2000-04-07
PCT/US2001/010210 WO2001078240A2 (en) 2000-04-07 2001-03-30 Method and apparatus for soft handoff communications in a communication system operating according to multiple communication standards

Publications (2)

Publication Number Publication Date
CA2372564A1 true CA2372564A1 (en) 2001-10-18
CA2372564C CA2372564C (en) 2005-01-04

Family

ID=24174980

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002372564A Expired - Fee Related CA2372564C (en) 2000-04-07 2001-03-30 Method and apparatus for soft handoff communications in a communication system operating according to multiple communication standards

Country Status (9)

Country Link
US (2) US6768908B1 (en)
EP (2) EP1238465B1 (en)
JP (1) JP4611599B2 (en)
KR (1) KR100443099B1 (en)
CN (1) CN1207930C (en)
AU (1) AU5301301A (en)
CA (1) CA2372564C (en)
DE (1) DE60113230T2 (en)
WO (1) WO2001078240A2 (en)

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Also Published As

Publication number Publication date
CA2372564C (en) 2005-01-04
US6768908B1 (en) 2004-07-27
JP2003530754A (en) 2003-10-14
DE60113230D1 (en) 2005-10-13
EP1238465A2 (en) 2002-09-11
CN1401193A (en) 2003-03-05
KR20020026451A (en) 2002-04-10
WO2001078240A2 (en) 2001-10-18
CN1207930C (en) 2005-06-22
US7489942B2 (en) 2009-02-10
EP1238465B1 (en) 2005-09-07
DE60113230T2 (en) 2006-01-12
AU5301301A (en) 2001-10-23
EP1238465A4 (en) 2002-10-30
US20040157609A1 (en) 2004-08-12
KR100443099B1 (en) 2004-08-04
EP1589780A1 (en) 2005-10-26
JP4611599B2 (en) 2011-01-12
WO2001078240A3 (en) 2002-07-04

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Effective date: 20190401