CA2052960A1 - Handoff procedure that minimizes disturbances to dtmf signalling in a cellular radio system - Google Patents

Handoff procedure that minimizes disturbances to dtmf signalling in a cellular radio system

Info

Publication number
CA2052960A1
CA2052960A1 CA002052960A CA2052960A CA2052960A1 CA 2052960 A1 CA2052960 A1 CA 2052960A1 CA 002052960 A CA002052960 A CA 002052960A CA 2052960 A CA2052960 A CA 2052960A CA 2052960 A1 CA2052960 A1 CA 2052960A1
Authority
CA
Canada
Prior art keywords
handoff
dtmf
transmission
radio system
cellular radio
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
CA002052960A
Other languages
French (fr)
Other versions
CA2052960C (en
Inventor
Jan Erik Ake Steinar Dahlin
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.)
Telefonaktiebolaget LM Ericsson AB
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 CA2052960A1 publication Critical patent/CA2052960A1/en
Application granted granted Critical
Publication of CA2052960C publication Critical patent/CA2052960C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off

Abstract

Disturbances to DTMF signaling between mobile stations and the land-based system caused by handoff are minimized. DTMF signals are transmitted in real time between a mobile station and its associated base station.
However, if during a DTMF transmission between a base station and the mobile switching center a handoff is requested, the handoff is delayed by a specified time in order to allow completion of the DTMF transmission.
Alternatively, both base stations involved in the handoff transmit overlapping DTMF tones until the handoff is completed. If the handoff is requested before the start of the DTMF tone transmission, the DTMF transmission is delayed until the handoff is completed.
CA002052960A 1990-10-09 1991-10-08 Handoff procedure that minimizes disturbances to dtmf signalling in a cellular radio system Expired - Lifetime CA2052960C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/594,036 US5140627A (en) 1990-10-09 1990-10-09 Handoff procedure that minimizes disturbances to dtmf signalling in a cellular radio system
US594,036 1990-10-09

Publications (2)

Publication Number Publication Date
CA2052960A1 true CA2052960A1 (en) 1992-04-10
CA2052960C CA2052960C (en) 2001-08-07

Family

ID=24377245

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002052960A Expired - Lifetime CA2052960C (en) 1990-10-09 1991-10-08 Handoff procedure that minimizes disturbances to dtmf signalling in a cellular radio system

Country Status (12)

Country Link
US (1) US5140627A (en)
EP (1) EP0480896B1 (en)
JP (1) JP2620002B2 (en)
AU (1) AU642531B2 (en)
CA (1) CA2052960C (en)
DE (1) DE69124908T2 (en)
DK (1) DK0480896T3 (en)
ES (1) ES2100939T3 (en)
FI (1) FI100085B (en)
HK (1) HK100497A (en)
MX (1) MX9101306A (en)
NO (1) NO178990C (en)

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IL100871A (en) * 1991-02-22 1994-11-28 Motorola Inc Apparatus and method for clock rate matching in independent networks
WO1993011625A1 (en) * 1991-12-06 1993-06-10 Motorola Inc. Radiotelephone system controller
US5408517A (en) * 1992-10-26 1995-04-18 Motorola, Inc. Method and apparatus for handoff synchronization
US5551070A (en) * 1993-01-28 1996-08-27 Telefonaktiebolaget Lm Ericsson Cartesian multicarrier feedback
FR2702109A1 (en) * 1993-02-26 1994-09-02 Alcatel Radiotelephone Method of managing frequency redefinition in a cellular radio communications system with mobile stations
CA2116736C (en) * 1993-03-05 1999-08-10 Edward M. Roney, Iv Decoder selection
US5483664A (en) * 1993-07-26 1996-01-09 Motorola, Inc. Cellular communications with scheduled handoffs
US5412375A (en) * 1993-09-27 1995-05-02 Motorola, Inc. Method of selecting an air interface for communication in a communication system
US5537679A (en) * 1994-08-01 1996-07-16 Motorola, Inc. Communication network with flexible handoff scheduling for mobile nodes
KR0123398B1 (en) * 1994-11-30 1997-11-19 양승택 Control method of hard-hand off in cdma msc
US5625872A (en) * 1994-12-22 1997-04-29 Telefonaktiebolaget Lm Ericsson Method and system for delayed transmission of fast associated control channel messages on a voice channel
KR0159198B1 (en) * 1995-06-23 1998-12-01 양승택 Switch control method for dual tone multi-frequency service of msc
US5737331A (en) * 1995-09-18 1998-04-07 Motorola, Inc. Method and apparatus for conveying audio signals using digital packets
US6292662B1 (en) * 1995-09-29 2001-09-18 Qualcomm Incorporated Method and system for processing telephone calls involving two digital wireless subscriber units that avoid double vocoding
US5884177A (en) * 1995-10-25 1999-03-16 Northern Telecom Limited Cellular communication system and method providing improved handoff capability
US6119004A (en) * 1996-09-25 2000-09-12 Matsushita Electric Industrial Co., Ltd. Base station equipment for mobile communication
US6650662B1 (en) 1997-12-12 2003-11-18 International Business Machines Corporation Method and system for transmitting a DTMF signal with compressed voice in a packet switching network
EP0972419A2 (en) 1998-02-09 2000-01-19 Cellon France SAS A method for operating a mobile phone device in a dynamic environment wherein a particular dynamism may mandate to change a transmitting mode, and a mobile phone device for use with such method
US6151514A (en) * 1998-04-22 2000-11-21 Nortel Networks Corporation Method and apparatus for normalizing DTMF messages from a cellular mobile station
US6337983B1 (en) * 2000-06-21 2002-01-08 Motorola, Inc. Method for autonomous handoff in a wireless communication system
FI20001513A (en) * 2000-06-26 2001-12-27 Nokia Networks Oy A method for improving the quality of data transmission
ATE350868T1 (en) * 2001-05-10 2007-01-15 Nortel Networks Ltd SYSTEM AND METHOD FOR DIRECTING COMMUNICATIONS BETWEEN MOBILE TELECOMMUNICATIONS NETWORKS USING DIFFERENT RADIO ACCESS TECHNOLOGIES
US7058408B2 (en) 2001-10-25 2006-06-06 Motorola, Inc. Method and apparatus for enabling discontinuous transmission feature on a mobile station
US8447301B2 (en) * 2004-02-12 2013-05-21 Samsung Electronics Co., Ltd Apparatus and method for improved handoffs in an EV-DV wireless network
ATE448653T1 (en) * 2004-09-30 2009-11-15 Ericsson Telefon Ab L M METHOD FOR AVOIDING INTERRUPTIONS IN PUSH-TO-TALK SERVICES
FI120434B (en) * 2005-02-08 2009-10-15 Teliasonera Ab Cell re-selection in cellular network based packet communication
CN101064961B (en) * 2006-04-29 2012-08-29 朗迅科技公司 Method for processing user input during switch period between switches of communication system
JP5182218B2 (en) * 2009-05-21 2013-04-17 富士通株式会社 Mobile communication system and radio base station apparatus
US8346235B2 (en) * 2010-01-25 2013-01-01 Research In Motion Limited DTMF signalling between mobile and server
US8804881B2 (en) * 2010-07-13 2014-08-12 Qualcomm Incorporated Data communication devices, methods, and systems

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JPS56116341A (en) * 1980-02-19 1981-09-12 Nec Corp Radio channel switching system in communication
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Also Published As

Publication number Publication date
ES2100939T3 (en) 1997-07-01
NO178990B (en) 1996-04-01
NO913857L (en) 1992-04-10
MX9101306A (en) 1993-07-01
FI914717A (en) 1992-04-10
JPH0697871A (en) 1994-04-08
AU8474991A (en) 1992-04-16
DE69124908D1 (en) 1997-04-10
FI914717A0 (en) 1991-10-07
US5140627A (en) 1992-08-18
EP0480896B1 (en) 1997-03-05
NO913857D0 (en) 1991-10-02
EP0480896A3 (en) 1992-12-23
AU642531B2 (en) 1993-10-21
HK100497A (en) 1997-08-08
CA2052960C (en) 2001-08-07
NO178990C (en) 1996-07-10
FI100085B (en) 1997-09-15
DE69124908T2 (en) 1997-06-19
JP2620002B2 (en) 1997-06-11
DK0480896T3 (en) 1997-09-08
EP0480896A2 (en) 1992-04-15

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Effective date: 20111008