CA2030607A1 - Method of maintaining an established connection in a mobile radio system comprising both analog and digital radio channels - Google Patents

Method of maintaining an established connection in a mobile radio system comprising both analog and digital radio channels

Info

Publication number
CA2030607A1
CA2030607A1 CA002030607A CA2030607A CA2030607A1 CA 2030607 A1 CA2030607 A1 CA 2030607A1 CA 002030607 A CA002030607 A CA 002030607A CA 2030607 A CA2030607 A CA 2030607A CA 2030607 A1 CA2030607 A1 CA 2030607A1
Authority
CA
Canada
Prior art keywords
digital
channel
time dispersion
analog
digital 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
CA002030607A
Other languages
French (fr)
Other versions
CA2030607C (en
Inventor
Jan Erik Ake Steiner Dahlin
Jan Erik Uddenfeldt
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
Priority claimed from SE8901385A external-priority patent/SE8901385D0/en
Priority claimed from US07/371,126 external-priority patent/US5042082A/en
Application filed by Individual filed Critical Individual
Publication of CA2030607A1 publication Critical patent/CA2030607A1/en
Application granted granted Critical
Publication of CA2030607C publication Critical patent/CA2030607C/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
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/208—Arrangements for detecting or preventing errors in the information received using signal quality detector involving signal re-encoding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0212—Channel estimation of impulse response
    • H04L25/0216—Channel estimation of impulse response with estimation of channel length
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention relates to a method in a mobile radio system having both digital and analog radio channels. An object of the invention is that a connection established on a digital radio channel often shall be possible to maintain even when the time dispersion on available digital radio channels exceeds the designed maximum time dispersion of equalizers in receiving stations. According the invention equalizers in the receivers of the system may be designed for a smaller maximum time dispersion than the total time dispersion the whole system shall be capable to handle. Instead handover is made to an other channel when the time dispersion of a used digital channel tends to become too big. When an other digital radio channel with low time dispersion is available handover is preferably done to this channel. Alternatively or in the absence of such a digital radio channel handover is performed to an analog radio channel.
CA002030607A 1989-04-17 1990-03-28 Method of maintaining an established connection in a mobile radio system comprising both analog and digital radio channels Expired - Fee Related CA2030607C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE8901385A SE8901385D0 (en) 1989-04-17 1989-04-17 TRAINING IN MOBILE RADIO SYSTEM
SE8901385-8 1989-04-17
US07/371,126 US5042082A (en) 1989-06-26 1989-06-26 Mobile assisted handoff
US371126 1989-06-26
PCT/SE1990/000199 WO1990013187A1 (en) 1989-04-17 1990-03-28 Method of maintaining an established connection in a mobile radio system comprising both analog and digital radio channels

Publications (2)

Publication Number Publication Date
CA2030607A1 true CA2030607A1 (en) 1990-10-18
CA2030607C CA2030607C (en) 2001-08-14

Family

ID=26660492

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002030607A Expired - Fee Related CA2030607C (en) 1989-04-17 1990-03-28 Method of maintaining an established connection in a mobile radio system comprising both analog and digital radio channels

Country Status (6)

Country Link
KR (1) KR950013303B1 (en)
AU (1) AU625128B2 (en)
BR (1) BR9006720A (en)
CA (1) CA2030607C (en)
NZ (1) NZ233178A (en)
WO (1) WO1990013187A1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8802229D0 (en) * 1988-06-14 1988-06-14 Ericsson Telefon Ab L M MOBILE RADIO STATION PROCEDURE
US20010050943A1 (en) 1989-08-03 2001-12-13 Mahany Ronald L. Radio frequency communication network having adaptive communication parameters
JP2749456B2 (en) * 1991-03-06 1998-05-13 三菱電機株式会社 Wireless communication equipment
EP0566551B1 (en) 1992-04-17 1999-08-04 Telefonaktiebolaget L M Ericsson Mobile assisted handover using CDMA
SE470416B (en) * 1992-07-03 1994-02-14 Ericsson Telefon Ab L M Procedure for recording traffic data in a telecommunications system
DE69323994T2 (en) * 1992-08-11 1999-07-29 Ericsson Telefon Ab L M REORGANIZATION OF CHANNELS
US5627879A (en) * 1992-09-17 1997-05-06 Adc Telecommunications, Inc. Cellular communications system with centralized base stations and distributed antenna units
US5603081A (en) * 1993-11-01 1997-02-11 Telefonaktiebolaget Lm Ericsson Method for communicating in a wireless communication system
MX9307243A (en) * 1992-11-24 1994-05-31 Ericsson Telefon Ab L M ANALOGUE RETRY.
US5432843A (en) * 1993-08-02 1995-07-11 Motorola Inc. Method of performing handoff in a cellular communication system
US5515366A (en) * 1994-11-17 1996-05-07 International Business Machines Corporation Method and apparatus for direct communication in a TDMA radio communication system
US5761240A (en) * 1996-02-06 1998-06-02 Ericsson Inc. Method and apparatus for determining an optical communications channel without loss of channel messages on a current communications channel
US5878349A (en) * 1996-07-16 1999-03-02 Telefonaktiebolaget L M Ericsson Call set-up on 800 MHz analog voice channel from 1900 MHZ digital control channel
US6021328A (en) * 1996-12-19 2000-02-01 Northern Telecom Limited Radio link quality handoff trigger
US6047191A (en) * 1997-02-14 2000-04-04 Telefonaktiebolaget Lm Ericsson Method of selecting a voice channel in a radio telecommunications network
EP0954142A1 (en) * 1998-04-28 1999-11-03 Lucent Technologies Inc. Channel estimation using a sliding window technique
US6459907B1 (en) * 1999-07-27 2002-10-01 Ericsson Inc. Systems and methods for channel selection for facsimile communication over a wireless communication network

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1230648A (en) * 1984-07-13 1987-12-22 Gerald P. Labedz Cellular voice and data radiotelephone system
EP0219559B1 (en) * 1985-10-17 1990-09-05 ANT Nachrichtentechnik GmbH Mobile radio system for the transmission of digital as well as analogous signals
DE3607687A1 (en) * 1986-03-08 1987-09-10 Philips Patentverwaltung METHOD AND CIRCUIT ARRANGEMENT FOR SWITCHING A RADIO CONNECTION INTO ANOTHER RADIO CELL OF A DIGITAL RADIO TRANSMISSION SYSTEM
DE3854465T2 (en) * 1987-11-27 1996-05-02 Nippon Electric Co Switching method in a digital cellular mobile communication system and mobile unit.

Also Published As

Publication number Publication date
KR920700503A (en) 1992-02-19
KR950013303B1 (en) 1995-11-02
WO1990013187A1 (en) 1990-11-01
CA2030607C (en) 2001-08-14
NZ233178A (en) 1992-06-25
BR9006720A (en) 1991-08-06
AU625128B2 (en) 1992-07-02
AU5530090A (en) 1990-11-16

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20080328