CA2291082A1 - Radio link quality handoff trigger - Google Patents

Radio link quality handoff trigger Download PDF

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Publication number
CA2291082A1
CA2291082A1 CA002291082A CA2291082A CA2291082A1 CA 2291082 A1 CA2291082 A1 CA 2291082A1 CA 002291082 A CA002291082 A CA 002291082A CA 2291082 A CA2291082 A CA 2291082A CA 2291082 A1 CA2291082 A1 CA 2291082A1
Authority
CA
Canada
Prior art keywords
erasures
cdma
call
link
maximum
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
CA002291082A
Other languages
French (fr)
Other versions
CA2291082C (en
Inventor
David E. Curtis
William B. Book
David A. Boettger
Ahmad Jalali
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.)
Nortel Networks Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2291082A1 publication Critical patent/CA2291082A1/en
Application granted granted Critical
Publication of CA2291082C publication Critical patent/CA2291082C/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
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • 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

Abstract

A method and system is disclosed for triggering handoff of a call from a CDMA
network to an AMPS network on which it is overlaid responsive to a determination that the CDMA RF link has degraded to such an extent that the call quality will be degraded significantly or the call is likely to be dropped is disclosed. A handoff of a call from a CDMA network to an AMPS network if, at a given time: (1) the number of forward link erasures is greater than a first maximum number of forward link erasures; or (2) the number of reverse link erasures is greater than a first maximum number of forward sink erasures; or (3) the number of forward link erasures is greater than a second maximum number of forward link erasures and the forward traffic channel gain is greater than a maximum forward traffic channel gain; or (4) the number of reverse link erasures is greater than a second maximum number of reverse link erasures and the ratio of energy per bit to noise power spectral density on the reverse link ("EB/NO") is greater than a maximum EB/NO. In alternative embodiments, the present invention may be used to trigger handoff of a call from a first CDMA
cell site to a second CDMA cell site or to an AMPS cell site serving a cell on which the cell served by the first CDMA cell site is not overlaid.
CA002291082A 1996-12-19 1997-12-17 Radio link quality handoff trigger Expired - Fee Related CA2291082C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/769,650 US6021328A (en) 1996-12-19 1996-12-19 Radio link quality handoff trigger
US08/769,650 1996-12-19
PCT/IB1997/001579 WO1998027777A2 (en) 1996-12-19 1997-12-17 Radio link quality handoff trigger

Publications (2)

Publication Number Publication Date
CA2291082A1 true CA2291082A1 (en) 1998-06-25
CA2291082C CA2291082C (en) 2005-04-12

Family

ID=25086116

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002291082A Expired - Fee Related CA2291082C (en) 1996-12-19 1997-12-17 Radio link quality handoff trigger

Country Status (5)

Country Link
US (1) US6021328A (en)
EP (1) EP0978209A2 (en)
AU (1) AU5233298A (en)
CA (1) CA2291082C (en)
WO (1) WO1998027777A2 (en)

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US7260401B2 (en) * 2000-12-05 2007-08-21 Qualcomm Incorporated Method and apparatus for flexible call recovery in a wireless communication system
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US6822950B2 (en) * 2002-05-06 2004-11-23 Motorola, Inc. Interference-efficient method and apparatus to provide CDMA services
US7450943B2 (en) 2003-02-12 2008-11-11 Qualcomm Incorporated Method and apparatus for determining coverage and switching between overlay communication systems
US7668561B2 (en) 2004-02-27 2010-02-23 Qualcomm Incorporated Apparatus and method for controlling reverse link interference among access terminals in wireless communications
US7848238B1 (en) 2007-05-09 2010-12-07 Sprint Spectrum L.P. Using VoIP-quality metrics to dynamically adjust the EV-DO reverse activity bit
US8107438B1 (en) 2008-06-18 2012-01-31 Sprint Spectrum L.P. Method for initiating handoff of a wireless access terminal based on the reverse activity bit
US8040803B1 (en) 2009-01-08 2011-10-18 Sprint Spectrum L.P. Using packet-transport metrics for call-admission control
US8254930B1 (en) 2009-02-18 2012-08-28 Sprint Spectrum L.P. Method and system for changing a media session codec before handoff in a wireless network
US9374306B1 (en) 2009-03-04 2016-06-21 Sprint Spectrum L.P. Using packet-transport metrics for setting DRCLocks
US9467938B1 (en) 2009-04-29 2016-10-11 Sprint Spectrum L.P. Using DRCLocks for conducting call admission control
US8310929B1 (en) * 2009-06-04 2012-11-13 Sprint Spectrum L.P. Method and system for controlling data rates based on backhaul capacity
US8245088B1 (en) 2009-06-30 2012-08-14 Sprint Spectrum L.P. Implementing quality of service (QoS) by using hybrid ARQ (HARQ) response for triggering the EV-DO reverse activity bit (RAB)
US8204000B1 (en) 2009-07-23 2012-06-19 Sprint Spectrum L.P. Achieving quality of service (QoS) by using the reverse activity bit (RAB) in creation of neighbor lists for selected access terminals
US8644176B1 (en) 2010-03-11 2014-02-04 Sprint Spectrum L.P. Methods and systems for supporting enhanced non-real-time services for real-time applications
US8363564B1 (en) 2010-03-25 2013-01-29 Sprint Spectrum L.P. EVDO coverage modification based on backhaul capacity
US8515434B1 (en) 2010-04-08 2013-08-20 Sprint Spectrum L.P. Methods and devices for limiting access to femtocell radio access networks
US8472952B1 (en) 2010-11-30 2013-06-25 Sprint Spectrum L.P. Discovering a frequency of a wireless access point
US8619674B1 (en) 2010-11-30 2013-12-31 Sprint Spectrum L.P. Delivery of wireless access point information
GB201208323D0 (en) * 2012-01-26 2012-06-27 Samsung Electronics Co Ltd Processing state information
GB2498781B (en) * 2012-01-26 2014-12-17 Samsung Electronics Co Ltd Processing state information
US9042829B2 (en) * 2013-01-04 2015-05-26 Nokia Corporation Method, apparatus, and computer program product for wireless short-range communication
US9485702B1 (en) * 2013-05-01 2016-11-01 Sprint Spectrum L.P. Wireless device communication using carrier priority

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US5697055A (en) * 1994-10-16 1997-12-09 Qualcomm Incorporated Method and apparatus for handoff between different cellular communications systems
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Also Published As

Publication number Publication date
EP0978209A2 (en) 2000-02-09
WO1998027777A3 (en) 1998-10-08
WO1998027777A2 (en) 1998-06-25
CA2291082C (en) 2005-04-12
AU5233298A (en) 1998-07-15
US6021328A (en) 2000-02-01

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Effective date: 20061218