TW200419952A - Soft handoff of a CDMA reverse link - Google Patents

Soft handoff of a CDMA reverse link

Info

Publication number
TW200419952A
TW200419952A TW092132400A TW92132400A TW200419952A TW 200419952 A TW200419952 A TW 200419952A TW 092132400 A TW092132400 A TW 092132400A TW 92132400 A TW92132400 A TW 92132400A TW 200419952 A TW200419952 A TW 200419952A
Authority
TW
Taiwan
Prior art keywords
timing
base station
reverse link
soft handoff
subscriber unit
Prior art date
Application number
TW092132400A
Other languages
Chinese (zh)
Other versions
TWI357730B (en
Inventor
James A Proctor Jr
Original Assignee
Tantivy Comm Inc
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 Tantivy Comm Inc filed Critical Tantivy Comm Inc
Publication of TW200419952A publication Critical patent/TW200419952A/en
Application granted granted Critical
Publication of TWI357730B publication Critical patent/TWI357730B/en

Links

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
    • 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
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—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
    • H04W56/001—Synchronization between nodes
    • H04W56/002—Mutual synchronization
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Wire Bonding (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Method and apparatus for base stations and subscriber units allows soft handoff of a CDMA reverse link utilizing an orthogonal channel structure. Subscriber units transmit an orthogonally coded signal over a reverse link to the base stations. A given base station provides timing control of the timing offset of the reverse link signal. Based on at least one criterion, an alignment controller determines that the given base station should hand off timing control to another base station, and a soft handoff process ensues. In response to a command or message for soft handoff of the subscriber unit from the given base station to another station, the subscriber unit makes a coarse timing adjustment to the timing of the coded signal. The subscriber unit may make fine timing adjustments based on feedback from the base station controlling timing. Multiple base stations may provide power control feedback to the subscriber unit.
TW092132400A 2002-11-20 2003-11-19 Soft handoff of a cdma reverse link TWI357730B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42784702P 2002-11-20 2002-11-20

Publications (2)

Publication Number Publication Date
TW200419952A true TW200419952A (en) 2004-10-01
TWI357730B TWI357730B (en) 2012-02-01

Family

ID=32326600

Family Applications (4)

Application Number Title Priority Date Filing Date
TW092132400A TWI357730B (en) 2002-11-20 2003-11-19 Soft handoff of a cdma reverse link
TW100114978A TWI470946B (en) 2002-11-20 2003-11-19 A wireless subscriber unit and a method of soft handover
TW103124639A TWI539762B (en) 2002-11-20 2003-11-19 Soft handoff of a cdma reverse link
TW096120422A TWI364920B (en) 2002-11-20 2003-11-19 Soft handoff of a cdma reverse link

Family Applications After (3)

Application Number Title Priority Date Filing Date
TW100114978A TWI470946B (en) 2002-11-20 2003-11-19 A wireless subscriber unit and a method of soft handover
TW103124639A TWI539762B (en) 2002-11-20 2003-11-19 Soft handoff of a cdma reverse link
TW096120422A TWI364920B (en) 2002-11-20 2003-11-19 Soft handoff of a cdma reverse link

Country Status (10)

Country Link
EP (1) EP1565995A4 (en)
JP (1) JP2006506917A (en)
KR (2) KR101019460B1 (en)
CN (1) CN1714516B (en)
AU (1) AU2003294428A1 (en)
CA (1) CA2506754A1 (en)
MX (1) MXPA05005395A (en)
NO (2) NO338063B1 (en)
TW (4) TWI357730B (en)
WO (1) WO2004046893A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8537656B2 (en) 2000-07-19 2013-09-17 Ipr Licensing, Inc. Method for compensating for multi-path of a CDMA reverse link utilizing an orthogonal channel structure
US7911993B2 (en) 2000-07-19 2011-03-22 Ipr Licensing, Inc. Method and apparatus for allowing soft handoff of a CDMA reverse link utilizing an orthogonal channel structure
US6917581B2 (en) 2001-07-17 2005-07-12 Ipr Licensing, Inc. Use of orthogonal or near orthogonal codes in reverse link
US7821995B2 (en) * 2004-09-30 2010-10-26 Alcatel-Lucent Usa Inc. Active session mobility solution for radio link protocol
JP5666449B2 (en) 2008-08-20 2015-02-12 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ Multiframe offset between neighboring cells to improve GERAN signaling performance when signaling power control is in use
FR2942097A1 (en) 2009-02-06 2010-08-13 Thomson Licensing TRANSMITTING METHOD IN A WIRELESS NETWORK AND CORRESPONDING RECEIVING METHOD
RU2520579C2 (en) 2009-05-11 2014-06-27 Квэлкомм Инкорпорейтед Time shifting of co-channel data transmissions to reduce co-channel interference
JP5479553B2 (en) * 2012-09-20 2014-04-23 京セラ株式会社 COMMUNICATION METHOD AND TERMINAL DEVICE USING THE SAME

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101501A (en) 1989-11-07 1992-03-31 Qualcomm Incorporated Method and system for providing a soft handoff in communications in a cdma cellular telephone system
US5103459B1 (en) * 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
JP2677191B2 (en) * 1994-03-15 1997-11-17 日本電気株式会社 CDMA communication system
ZA955605B (en) * 1994-07-13 1996-04-10 Qualcomm Inc System and method for simulating user interference received by subscriber units in a spread spectrum communication network
US5691974A (en) * 1995-01-04 1997-11-25 Qualcomm Incorporated Method and apparatus for using full spectrum transmitted power in a spread spectrum communication system for tracking individual recipient phase, time and energy
JPH1013918A (en) * 1996-06-19 1998-01-16 Toshiba Corp Moving communication system, adapting code division multiple access system, and its radio communication device
JPH1022874A (en) * 1996-07-09 1998-01-23 Hitachi Ltd Cdma communication system and method therefor
JPH1028077A (en) * 1996-07-11 1998-01-27 Takuro Sato Communication equipment
US5937019A (en) * 1996-08-07 1999-08-10 Qualcomm Incorporated Method and apparatus for reliable intersystem handoff in a CDMA system
KR100407355B1 (en) 1998-02-14 2004-04-03 삼성전자주식회사 Apparatus and method for aligning time of reverse link in mobile communication system
US5956641A (en) * 1998-03-30 1999-09-21 Motorola, Inc. System and method for facilitating a handoff of at least one mobile unit in a telecommunication system
JP2000278759A (en) * 1999-03-26 2000-10-06 Oki Electric Ind Co Ltd Transmission timing controller
JP2000286784A (en) * 1999-03-31 2000-10-13 Oki Electric Ind Co Ltd Radio terminal, radio base station and radio communication system
ATE213897T1 (en) * 1999-04-30 2002-03-15 Cit Alcatel SOFT HANDOVER METHOD FOR CDMA USING RETURN CHANNEL MEASUREMENT DATA
JP2001016159A (en) * 1999-06-28 2001-01-19 Fujitsu Ltd Base station and mobile station
US8099122B1 (en) * 2000-06-05 2012-01-17 Qualcomm Incorporated Method and apparatus for improved forward link power control while in soft handoff
CN1223102C (en) * 2000-06-24 2005-10-12 三星电子株式会社 Appts. and method for synchronization of uplink synchronous transmission scheme in CDMA communication system
US7006428B2 (en) * 2000-07-19 2006-02-28 Ipr Licensing, Inc. Method for allowing multi-user orthogonal and non-orthogonal interoperability of code channels
DE60104243T2 (en) * 2000-08-09 2006-06-14 Sk Telecom Co Handover procedure in wireless telecommunication systems with USTS support
US7054292B2 (en) * 2000-10-27 2006-05-30 L-3 Communications Corporation Hybrid synchronous space/code multiple access system using an adaptive antenna system
US6930470B2 (en) * 2001-03-01 2005-08-16 Nortel Networks Limited System and method for code division multiple access communication in a wireless communication environment
US6917581B2 (en) * 2001-07-17 2005-07-12 Ipr Licensing, Inc. Use of orthogonal or near orthogonal codes in reverse link

Also Published As

Publication number Publication date
NO20052945D0 (en) 2005-06-16
KR101019460B1 (en) 2011-03-07
NO342812B1 (en) 2018-08-13
WO2004046893A2 (en) 2004-06-03
TWI364920B (en) 2012-05-21
KR20070055642A (en) 2007-05-30
EP1565995A2 (en) 2005-08-24
NO20052945L (en) 2005-08-17
TW201206095A (en) 2012-02-01
JP2006506917A (en) 2006-02-23
TW200824320A (en) 2008-06-01
TWI539762B (en) 2016-06-21
AU2003294428A1 (en) 2004-06-15
KR20050085092A (en) 2005-08-29
CN1714516B (en) 2011-06-08
NO338063B1 (en) 2016-07-25
TW201521368A (en) 2015-06-01
WO2004046893A3 (en) 2004-10-28
NO20160875A1 (en) 2005-08-17
CA2506754A1 (en) 2004-06-03
EP1565995A4 (en) 2006-12-06
AU2003294428A8 (en) 2004-06-15
KR101047967B1 (en) 2011-07-12
MXPA05005395A (en) 2005-11-23
TWI470946B (en) 2015-01-21
TWI357730B (en) 2012-02-01
CN1714516A (en) 2005-12-28

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees