CA2089365A1 - Communication transfer in a radiotelephone system - Google Patents

Communication transfer in a radiotelephone system

Info

Publication number
CA2089365A1
CA2089365A1 CA2089365A CA2089365A CA2089365A1 CA 2089365 A1 CA2089365 A1 CA 2089365A1 CA 2089365 A CA2089365 A CA 2089365A CA 2089365 A CA2089365 A CA 2089365A CA 2089365 A1 CA2089365 A1 CA 2089365A1
Authority
CA
Canada
Prior art keywords
site
rssit
base
rssis
mobile
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
CA2089365A
Other languages
French (fr)
Other versions
CA2089365C (en
Inventor
Kenneth A. Felix
Alton P. Werronen
Thomas B. Hart
Scott A. Hardman
Thomas G. Hulsebosch
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.)
Motorola Solutions Inc
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 US07/612,292 external-priority patent/US5203010A/en
Application filed by Individual filed Critical Individual
Publication of CA2089365A1 publication Critical patent/CA2089365A1/en
Application granted granted Critical
Publication of CA2089365C publication Critical patent/CA2089365C/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
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • 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
    • H04W36/24—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

Abstract

A cellular system transfers a call from a source base-site (200) to one target base-site (205, 210). A source base-site (200) measures the signal strength (RSSIS) of a mobile (225), provides a forecasted signal strength (RSSIF) and sets up two time windows. The source base-site (200) sends the measured and forecasted signal strengths to candidate base-sites (205, 210) found by the mobile (225) which measure the mobile (225) signal strength (RSSIT) and compare it to (RSSIS + hysteresis value). If RSSIT> RSSIS, the call is transferred to the best responding cell. If RSSIT< RSSIS, RSSIT is compared to RSSIF.
During this time, the mobile (225) will increase power at the end of the first time window. If RSSIT> RSSIF at any candi-date base-sites (205, 210), the call is transferred to the responding base-site (205, 210). If the source base-site (200) receives no responses during the second time window, the process ends.
CA002089365A 1990-09-27 1991-08-16 Communication transfer in a radiotelephone system Expired - Fee Related CA2089365C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US58877190A 1990-09-27 1990-09-27
US588,771 1990-09-27
US07/612,292 US5203010A (en) 1990-11-13 1990-11-13 Radio telephone system incorporating multiple time periods for communication transfer
US612,292 1990-11-13

Publications (2)

Publication Number Publication Date
CA2089365A1 true CA2089365A1 (en) 1992-03-28
CA2089365C CA2089365C (en) 1996-06-11

Family

ID=27080366

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002089365A Expired - Fee Related CA2089365C (en) 1990-09-27 1991-08-16 Communication transfer in a radiotelephone system

Country Status (5)

Country Link
JP (1) JP2652465B2 (en)
KR (1) KR0138970B1 (en)
CA (1) CA2089365C (en)
MX (1) MX173850B (en)
WO (1) WO1992006543A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2107820A1 (en) * 1992-10-16 1994-04-17 Keith Daniel O'neill Low-power wireless system for telephone services
GB2273416B (en) * 1992-11-27 1997-03-26 Motorola Ltd A communications system and method therefor
GB2280335B (en) * 1993-07-22 1997-05-28 Northern Telecom Ltd Mobile communications
SE9401713D0 (en) * 1994-05-16 1994-05-16 Ericsson Telefon Ab L M Method to improve measurement accuracy in handover decision
US5732327A (en) * 1994-12-28 1998-03-24 Ntt Mobile Communications Network Inc. Method for automatic creation of peripheral zone information
US5903840A (en) * 1996-01-16 1999-05-11 Telefonaktiebolaget Im Ericsson (Publ) System and method for adaptive measurement collection and handoff queuing in a radio telecommunications network
KR100223370B1 (en) * 1996-12-19 1999-10-15 윤종용 Soft hand off mehtod in mobile communication system
FI981431A (en) 1998-06-22 1999-12-23 Nokia Mobile Phones Ltd Measuring method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328698A (en) * 1963-06-28 1967-06-27 Itt Selector for choosing the strongest signal including means for inhibiting all signals below a selected level
US4222115A (en) * 1978-03-13 1980-09-09 Purdue Research Foundation Spread spectrum apparatus for cellular mobile communication systems
JPS6130138A (en) * 1984-07-20 1986-02-12 Nippon Telegr & Teleph Corp <Ntt> Mobile radio channel switching method
JPS6292528A (en) * 1985-10-17 1987-04-28 Nippon Telegr & Teleph Corp <Ntt> Radio zone transfer detection system
US4696027A (en) * 1986-08-01 1987-09-22 Motorola, Inc. Handoff apparatus and method with interference reduction for a radio system
US4718081A (en) * 1986-11-13 1988-01-05 General Electric Company Method and apparatus for reducing handoff errors in a cellular radio telephone communications system
US4794635A (en) * 1986-11-28 1988-12-27 Motorola, Inc. Two-way radio communication system with max-minimum call assignment method
JP2636236B2 (en) * 1987-03-31 1997-07-30 三菱電機株式会社 Switching channels during a call
US5065449A (en) * 1987-08-03 1991-11-12 Orion Industries Booster diversity receiving system usable with cellular booster
JPS6457837A (en) * 1987-08-28 1989-03-06 Toshiba Corp Radio channel switching system
JPH01205636A (en) * 1988-02-12 1989-08-18 Nec Corp Automobile telephone base station

Also Published As

Publication number Publication date
MX173850B (en) 1994-04-06
MX9101264A (en) 1992-05-04
KR0138970B1 (en) 1998-07-01
JP2652465B2 (en) 1997-09-10
JPH06505133A (en) 1994-06-09
CA2089365C (en) 1996-06-11
WO1992006543A1 (en) 1992-04-16

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20030818