WO2002047423A3 - Dynamic offset threshold for diversity handover in telecommunications system - Google Patents

Dynamic offset threshold for diversity handover in telecommunications system Download PDF

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Publication number
WO2002047423A3
WO2002047423A3 PCT/SE2001/002682 SE0102682W WO0247423A3 WO 2002047423 A3 WO2002047423 A3 WO 2002047423A3 SE 0102682 W SE0102682 W SE 0102682W WO 0247423 A3 WO0247423 A3 WO 0247423A3
Authority
WO
WIPO (PCT)
Prior art keywords
handover
offset threshold
dynamic offset
base station
sequence
Prior art date
Application number
PCT/SE2001/002682
Other languages
French (fr)
Other versions
WO2002047423A2 (en
Inventor
Staffan Johansson
Daniel Jannok
Jonas Ohlsson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to DE60136561T priority Critical patent/DE60136561D1/en
Priority to EP01270075A priority patent/EP1340397B1/en
Priority to AU2002218629A priority patent/AU2002218629A1/en
Publication of WO2002047423A2 publication Critical patent/WO2002047423A2/en
Publication of WO2002047423A3 publication Critical patent/WO2002047423A3/en

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Classifications

    • 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
    • H04W36/185—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection using make before break
    • 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

A telecommunications system has a source base station (BSS) and a destination base station (BSD), and a handover unit (100) having a dynamic offset threshold determination unit (102) which establishes a dynamic offset threshold for starting soft handover. When the dynamic offset threshold for soft handover is exceeded, a preliminary portion of a handover sequence is initiated at the destination base station. The preliminary portion of the handover sequence is initiated so that a time-critical handover sequence activity (such as L1 uplink synchronization) is well underway, if ot completed, by the time the soft handover is actually needed. The dynamic offset threshold for starting handover is based on a probability that the mobile station will engage in the handover. The probability is a statistical probability that handover will actually occur based on handover history of other mobile stations previously and similarly traveling and of the same signal strength. Another portion of the soft handover sequence (e.g., a remaining portion of the soft handover sequence) is initiated when the signal strength from the destination base station as received at the specified mobile station has a predetermined relationship to a fixed offset threshold.
PCT/SE2001/002682 2000-12-04 2001-12-04 Dynamic offset threshold for diversity handover in telecommunications system WO2002047423A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE60136561T DE60136561D1 (en) 2000-12-04 2001-12-04 DYNAMIC OFFSET THRESHOLD FOR DIVERSITY WIDTH
EP01270075A EP1340397B1 (en) 2000-12-04 2001-12-04 Dynamic offset threshold for diversity handover in telecommunications system
AU2002218629A AU2002218629A1 (en) 2000-12-04 2001-12-04 Dynamic offset threshold for diversity handover in telecommunications system

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US25047600P 2000-12-04 2000-12-04
US25047300P 2000-12-04 2000-12-04
US60/250,473 2000-12-04
US60/250,476 2000-12-04
US09/931,580 US6907245B2 (en) 2000-12-04 2001-08-17 Dynamic offset threshold for diversity handover in telecommunications system
US09/931,580 2001-08-17

Publications (2)

Publication Number Publication Date
WO2002047423A2 WO2002047423A2 (en) 2002-06-13
WO2002047423A3 true WO2002047423A3 (en) 2002-08-15

Family

ID=27400327

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/002682 WO2002047423A2 (en) 2000-12-04 2001-12-04 Dynamic offset threshold for diversity handover in telecommunications system

Country Status (7)

Country Link
US (1) US6907245B2 (en)
EP (1) EP1340397B1 (en)
AT (1) ATE414389T1 (en)
AU (1) AU2002218629A1 (en)
DE (1) DE60136561D1 (en)
TW (1) TW515212B (en)
WO (1) WO2002047423A2 (en)

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Also Published As

Publication number Publication date
US6907245B2 (en) 2005-06-14
EP1340397A2 (en) 2003-09-03
DE60136561D1 (en) 2008-12-24
WO2002047423A2 (en) 2002-06-13
TW515212B (en) 2002-12-21
US20020068571A1 (en) 2002-06-06
EP1340397B1 (en) 2008-11-12
AU2002218629A1 (en) 2002-06-18
ATE414389T1 (en) 2008-11-15

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