WO2002047424A3 - Preliminary performance of handover functions in telecommunications system - Google Patents

Preliminary performance of handover functions in telecommunications system Download PDF

Info

Publication number
WO2002047424A3
WO2002047424A3 PCT/SE2001/002683 SE0102683W WO0247424A3 WO 2002047424 A3 WO2002047424 A3 WO 2002047424A3 SE 0102683 W SE0102683 W SE 0102683W WO 0247424 A3 WO0247424 A3 WO 0247424A3
Authority
WO
WIPO (PCT)
Prior art keywords
handover
telecommunications system
base station
offset threshold
dynamic offset
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.)
Ceased
Application number
PCT/SE2001/002683
Other languages
French (fr)
Other versions
WO2002047424A2 (en
Inventor
Staffan Johansson
Daniel Jannok
Stefan Hansson
Jonas Ohlsson
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
Telefonaktiebolaget LM Ericsson AB
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 US09/931,280 external-priority patent/US20020068566A1/en
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to AU2002221224A priority Critical patent/AU2002221224A1/en
Priority to EP01270076A priority patent/EP1340398B1/en
Priority to DE60130789T priority patent/DE60130789T2/en
Publication of WO2002047424A2 publication Critical patent/WO2002047424A2/en
Publication of WO2002047424A3 publication Critical patent/WO2002047424A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Exchange Systems With Centralized Control (AREA)

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 time-critical handover sequence activities (such as L1 uplink synchronization) are well underway, if not completed, by the time the soft handover is actually needed.
PCT/SE2001/002683 2000-12-04 2001-12-04 Preliminary performance of handover functions in telecommunications system Ceased WO2002047424A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2002221224A AU2002221224A1 (en) 2000-12-04 2001-12-04 Preliminary performance of handover functions in telecommunications system
EP01270076A EP1340398B1 (en) 2000-12-04 2001-12-04 Preliminary performance of handover functions in telecommunications system
DE60130789T DE60130789T2 (en) 2000-12-04 2001-12-04 PREPARATORY EXECUTION OF ADDITIONAL FUNCTIONS IN A TELECOMMUNICATIONS SYSTEM

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US25047600P 2000-12-04 2000-12-04
US60/250,476 2000-12-04
US09/931,280 2001-08-17
US09/931,280 US20020068566A1 (en) 2000-12-04 2001-08-17 Preliminary performance of handover function in telecommunications system

Publications (2)

Publication Number Publication Date
WO2002047424A2 WO2002047424A2 (en) 2002-06-13
WO2002047424A3 true WO2002047424A3 (en) 2002-08-15

Family

ID=26940906

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/002683 Ceased WO2002047424A2 (en) 2000-12-04 2001-12-04 Preliminary performance of handover functions in telecommunications system

Country Status (6)

Country Link
EP (1) EP1340398B1 (en)
AT (1) ATE375066T1 (en)
AU (1) AU2002221224A1 (en)
DE (1) DE60130789T2 (en)
ES (1) ES2293960T3 (en)
WO (1) WO2002047424A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0303462D0 (en) 2003-12-22 2003-12-22 Ericsson Telefon Ab L M Arrangements and method for handling macro diversity in UTRAN
US8086241B2 (en) 2004-11-18 2011-12-27 Mediatek Incorporation Handoff methods, and devices utilizing same
US11792707B2 (en) 2021-03-19 2023-10-17 Dish Wireless L.L.C. Intelligent mobility in communication networks

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5408517A (en) * 1992-10-26 1995-04-18 Motorola, Inc. Method and apparatus for handoff synchronization
US5652748A (en) * 1993-09-20 1997-07-29 Nokia Telecommunications Oy Method for making a handover in a CDMA cellular radio system, and a mobile station
EP0845877A2 (en) * 1996-11-28 1998-06-03 Oki Electric Industry Co., Ltd. Mobile communication system for accomplishing handover with phase difference of frame sync signals corrected
WO2001041482A1 (en) * 1999-12-02 2001-06-07 Telefonaktiebolaget Lm Ericsson (Publ) Synchronization of diversity handover destination base station

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5408517A (en) * 1992-10-26 1995-04-18 Motorola, Inc. Method and apparatus for handoff synchronization
US5652748A (en) * 1993-09-20 1997-07-29 Nokia Telecommunications Oy Method for making a handover in a CDMA cellular radio system, and a mobile station
EP0845877A2 (en) * 1996-11-28 1998-06-03 Oki Electric Industry Co., Ltd. Mobile communication system for accomplishing handover with phase difference of frame sync signals corrected
WO2001041482A1 (en) * 1999-12-02 2001-06-07 Telefonaktiebolaget Lm Ericsson (Publ) Synchronization of diversity handover destination base station

Also Published As

Publication number Publication date
AU2002221224A1 (en) 2002-06-18
WO2002047424A2 (en) 2002-06-13
ES2293960T3 (en) 2008-04-01
EP1340398A2 (en) 2003-09-03
DE60130789D1 (en) 2007-11-15
ATE375066T1 (en) 2007-10-15
EP1340398B1 (en) 2007-10-03
DE60130789T2 (en) 2008-07-17

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