CA2066529A1 - Digital cellular switching system with means for securing uninterrupted data transparency during handoffs - Google Patents

Digital cellular switching system with means for securing uninterrupted data transparency during handoffs

Info

Publication number
CA2066529A1
CA2066529A1 CA2066529A CA2066529A CA2066529A1 CA 2066529 A1 CA2066529 A1 CA 2066529A1 CA 2066529 A CA2066529 A CA 2066529A CA 2066529 A CA2066529 A CA 2066529A CA 2066529 A1 CA2066529 A1 CA 2066529A1
Authority
CA
Canada
Prior art keywords
signal
connection
securing
switching
switching system
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
CA2066529A
Other languages
French (fr)
Other versions
CA2066529C (en
Inventor
Susumu Kojima
Noriaki Nagashima
Tadao Hashimoto
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.)
NEC Corp
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 CA2066529A1 publication Critical patent/CA2066529A1/en
Application granted granted Critical
Publication of CA2066529C publication Critical patent/CA2066529C/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
    • 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

Abstract

In a cellular communications system, the quality of a signal over a first two-way connection from a destination to a mobile terminal is compared with a threshold. When the signal quality becomes lower than the threshold, a second two-way connection is established and a switching request signal and an information-bearing signal are sent from the mobile terminal through both connections to a switching exchange. In response to the request signal, one directional path of the first connection is cleared by the exchange to prevent a version of the signal passing through the first connection from reaching the destination and a first switching complete signal is sent through the other path of the first connection to the mobile terminal to allow it to clear the first connection and return a second switching complete signal. The other path of the first connection is then cleared by the exchange in response to the second switching complete signal.
CA002066529A 1991-04-17 1992-04-21 Digital cellular switching system with means for securing uninterrupted data transparency during handoffs Expired - Fee Related CA2066529C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3-112617 1991-04-17
JP3112617A JP2679442B2 (en) 1991-04-17 1991-04-17 Digital mobile communication system

Publications (2)

Publication Number Publication Date
CA2066529A1 true CA2066529A1 (en) 1992-10-18
CA2066529C CA2066529C (en) 1996-05-07

Family

ID=14591221

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002066529A Expired - Fee Related CA2066529C (en) 1991-04-17 1992-04-21 Digital cellular switching system with means for securing uninterrupted data transparency during handoffs

Country Status (7)

Country Link
US (1) US5323446A (en)
EP (1) EP0509548B1 (en)
JP (1) JP2679442B2 (en)
AU (1) AU644956B2 (en)
CA (1) CA2066529C (en)
DE (1) DE69222345T2 (en)
ES (1) ES2107477T3 (en)

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US5930727A (en) * 1995-07-21 1999-07-27 Ericsson Inc. Analog fax and modem requests in a D-AMPS multi-line terminal system
US5884177A (en) * 1995-10-25 1999-03-16 Northern Telecom Limited Cellular communication system and method providing improved handoff capability
US5774809A (en) * 1996-02-12 1998-06-30 Nokia Mobile Phones Limited Simplified mobile assisted handoff of signal between cells
US6192039B1 (en) * 1996-03-25 2001-02-20 Yrp Mobile Telecommunications Key Technology Research Laboratories Co., Ltd. Method for flow control, node and communication network employing the flow control
US5784695A (en) * 1996-05-14 1998-07-21 Trw Inc. Method and apparatus for handover control in a satellite based telecommunications system
US5822313A (en) * 1996-05-24 1998-10-13 National Semiconductor Corporation Seamless handover in a cordless TDMA system
FR2750820B1 (en) * 1996-07-04 1999-04-02 Alcatel Espace METHOD FOR SWITCHING A CHANNEL FROM A FIRST PROPAGATION PATH TO A SECOND PROPAGATION PATH
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US7492787B2 (en) * 2002-03-29 2009-02-17 Fujitsu Limited Method, apparatus, and medium for migration across link technologies
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US5175867A (en) * 1991-03-15 1992-12-29 Telefonaktiebolaget L M Ericsson Neighbor-assisted handoff in a cellular communications system

Also Published As

Publication number Publication date
DE69222345T2 (en) 1998-03-19
EP0509548A3 (en) 1993-06-30
JP2679442B2 (en) 1997-11-19
JPH04317298A (en) 1992-11-09
CA2066529C (en) 1996-05-07
AU644956B2 (en) 1993-12-23
DE69222345D1 (en) 1997-10-30
ES2107477T3 (en) 1997-12-01
EP0509548A2 (en) 1992-10-21
AU1501092A (en) 1992-10-22
EP0509548B1 (en) 1997-09-24
US5323446A (en) 1994-06-21

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 19990421