WO1998027777A3 - Radio link quality handoff trigger - Google Patents

Radio link quality handoff trigger Download PDF

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Publication number
WO1998027777A3
WO1998027777A3 PCT/IB1997/001579 IB9701579W WO9827777A3 WO 1998027777 A3 WO1998027777 A3 WO 1998027777A3 IB 9701579 W IB9701579 W IB 9701579W WO 9827777 A3 WO9827777 A3 WO 9827777A3
Authority
WO
WIPO (PCT)
Prior art keywords
erasures
cdma
link
call
maximum
Prior art date
Application number
PCT/IB1997/001579
Other languages
French (fr)
Other versions
WO1998027777A2 (en
Inventor
David E Curtis
William B Book
David A Boettger
Ahmad Jalali
Original Assignee
Northern Telecom Ltd
David E Curtis
William B Book
David A Boettger
Ahmad Jalali
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 Northern Telecom Ltd, David E Curtis, William B Book, David A Boettger, Ahmad Jalali filed Critical Northern Telecom Ltd
Priority to AU52332/98A priority Critical patent/AU5233298A/en
Priority to CA002291082A priority patent/CA2291082C/en
Priority to EP97947185A priority patent/EP0978209A2/en
Publication of WO1998027777A2 publication Critical patent/WO1998027777A2/en
Publication of WO1998027777A3 publication Critical patent/WO1998027777A3/en

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 link 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.
PCT/IB1997/001579 1996-12-19 1997-12-17 Radio link quality handoff trigger WO1998027777A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU52332/98A AU5233298A (en) 1996-12-19 1997-12-17 Radio link quality handoff trigger
CA002291082A CA2291082C (en) 1996-12-19 1997-12-17 Radio link quality handoff trigger
EP97947185A EP0978209A2 (en) 1996-12-19 1997-12-17 Radio link quality handoff trigger

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
WO1998027777A2 WO1998027777A2 (en) 1998-06-25
WO1998027777A3 true WO1998027777A3 (en) 1998-10-08

Family

ID=25086116

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1997/001579 WO1998027777A2 (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
US7945266B2 (en) 2000-12-05 2011-05-17 Qualcomm Incorporated Method and apparatus for call recovery in a wireless communication system
US7567781B2 (en) 2001-01-05 2009-07-28 Qualcomm, Incorporated Method and apparatus for power level adjustment 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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US5640414A (en) * 1992-03-05 1997-06-17 Qualcomm Incorporated Mobile station assisted soft handoff in a CDMA cellular communications system
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Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990013187A1 (en) * 1989-04-17 1990-11-01 Telefonaktiebolaget Lm Ericsson Method of maintaining an established connection in a mobile radio system comprising both analog and digital radio channels
US5640414A (en) * 1992-03-05 1997-06-17 Qualcomm Incorporated Mobile station assisted soft handoff in a CDMA cellular communications system
US5649308A (en) * 1993-04-12 1997-07-15 Trw Inc. Multiformat auto-handoff communications handset
US5313489A (en) * 1993-06-25 1994-05-17 Motorola, Inc. Signal processing in communication systems
WO1995004423A1 (en) * 1993-08-02 1995-02-09 Motorola Inc. A method of performing handoff in a cellular communication system
WO1995012297A1 (en) * 1993-10-28 1995-05-04 Qualcomm Incorporated Method and apparatus for reducing the average downlink transmitted power from base stations during soft handoff
EP0680160A2 (en) * 1994-04-27 1995-11-02 Ntt Mobile Communications Network Inc. Method and apparatus for transmission power control of a mobile station during soft handoff in a CDMA system
WO1995031880A1 (en) * 1994-05-16 1995-11-23 Telefonaktiebolaget Lm Ericsson A method and system for confirming the identity of a target cell for handoff

Also Published As

Publication number Publication date
EP0978209A2 (en) 2000-02-09
AU5233298A (en) 1998-07-15
US6021328A (en) 2000-02-01
WO1998027777A2 (en) 1998-06-25
CA2291082A1 (en) 1998-06-25
CA2291082C (en) 2005-04-12

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