WO1997044984A3 - Method and apparatus for hard handoff in a cdma system - Google Patents

Method and apparatus for hard handoff in a cdma system Download PDF

Info

Publication number
WO1997044984A3
WO1997044984A3 PCT/US1997/009305 US9709305W WO9744984A3 WO 1997044984 A3 WO1997044984 A3 WO 1997044984A3 US 9709305 W US9709305 W US 9709305W WO 9744984 A3 WO9744984 A3 WO 9744984A3
Authority
WO
WIPO (PCT)
Prior art keywords
base station
active communication
list
remote unit
base stations
Prior art date
Application number
PCT/US1997/009305
Other languages
French (fr)
Other versions
WO1997044984A2 (en
Inventor
Lindsay A Weaver Jr
David B Munsinger
Roberto Padovani
Noam A Ziv
Gadi Karmi
Klein S Gilhousen
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Priority to JP54298797A priority Critical patent/JP3933696B2/en
Priority to BR9712089-8A priority patent/BR9712089A/en
Priority to IL12719997A priority patent/IL127199A0/en
Priority to DE69738471T priority patent/DE69738471T2/en
Priority to CA002256425A priority patent/CA2256425A1/en
Priority to EP97929732A priority patent/EP0951793B1/en
Priority to AU33722/97A priority patent/AU717479B2/en
Publication of WO1997044984A2 publication Critical patent/WO1997044984A2/en
Publication of WO1997044984A3 publication Critical patent/WO1997044984A3/en
Priority to FI982520A priority patent/FI982520A/en
Priority to HK00102368A priority patent/HK1023676A1/en

Links

Classifications

    • 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
    • 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
    • H04W36/0005—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
    • H04W36/00837—Determination of triggering parameters for hand-off

Abstract

In a communications network, a network user communicates through a remote unit (30) with another user via at least one base station (100). The communications network includes a first mobile switching center (MSC-I) which controls communications through a first set of base stations including a first base station (100). The remote unit (30) stores a list of active base stations which has an entry corresponding to each base station with which active communication is established. The first base station (100) has an entry on the list of active base stations. The first base station (100) measures a round trip delay of an active communication signal between the first base station (100) and the remote unit (30). A handoff of the active communication signal is initiated if the round trip delay of the active communication exceeds a threshold if the first base station (100) is designated as a reference base station. Alternatively, the remote unit (30) also stores a list of candidate base stations comprising an entry corresponding to each base station through which active communication may be possible but is not established. A handoff of the active communication signal is initiated if the list of candidate base stations comprises an entry corresponding to a triggering pilot signal.
PCT/US1997/009305 1996-05-23 1997-05-23 Method and apparatus for hard handoff in a cdma system WO1997044984A2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP54298797A JP3933696B2 (en) 1996-05-23 1997-05-23 Method and apparatus for hard handoff in a CDMA system
BR9712089-8A BR9712089A (en) 1996-05-23 1997-05-23 Method and equipment for hard transfer in a cdma system.
IL12719997A IL127199A0 (en) 1996-05-23 1997-05-23 Method and apparatus for hard handoff in a cdma system
DE69738471T DE69738471T2 (en) 1996-05-23 1997-05-23 METHOD AND DEVICE FOR HARD DISTRIBUTION IN A CDMA SYSTEM
CA002256425A CA2256425A1 (en) 1996-05-23 1997-05-23 Method and apparatus for hard handoff in a cdma system
EP97929732A EP0951793B1 (en) 1996-05-23 1997-05-23 Method and apparatus for hard handoff in a cdma system
AU33722/97A AU717479B2 (en) 1996-05-23 1997-05-23 Method and apparatus for hard handoff in a CDMA system
FI982520A FI982520A (en) 1996-05-23 1998-11-20 F "operation and systems for hard handover in a CDMA system
HK00102368A HK1023676A1 (en) 1996-05-23 2000-04-19 Method and apparatus for hard handoff in a cdma system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/652,742 US5848063A (en) 1996-05-23 1996-05-23 Method and apparatus for hard handoff in a CDMA system
US652,742 1996-05-23

Publications (2)

Publication Number Publication Date
WO1997044984A2 WO1997044984A2 (en) 1997-11-27
WO1997044984A3 true WO1997044984A3 (en) 1997-12-31

Family

ID=24617975

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/009305 WO1997044984A2 (en) 1996-05-23 1997-05-23 Method and apparatus for hard handoff in a cdma system

Country Status (15)

Country Link
US (1) US5848063A (en)
EP (2) EP1492373B1 (en)
JP (1) JP3933696B2 (en)
CN (3) CN1297175C (en)
AT (2) ATE509490T1 (en)
AU (1) AU717479B2 (en)
BR (1) BR9712089A (en)
CA (1) CA2256425A1 (en)
DE (1) DE69738471T2 (en)
ES (1) ES2299185T3 (en)
FI (1) FI982520A (en)
HK (1) HK1023676A1 (en)
IL (1) IL127199A0 (en)
RU (1) RU98123191A (en)
WO (1) WO1997044984A2 (en)

Families Citing this family (89)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980014306A (en) * 1996-08-09 1998-05-25 김광호 Hard handoff processing device and processing method thereof
JP3229928B2 (en) * 1996-10-25 2001-11-19 沖電気工業株式会社 Mobile communication system
US6026301A (en) * 1996-12-17 2000-02-15 Northern Telecom Limited Method for hard handoff in a CDMA cellular environment
US5940761A (en) * 1997-01-15 1999-08-17 Qaulcomm Incorporated Method and apparatus for performing mobile assisted hard handoff between communication systems
US5999816A (en) * 1997-02-18 1999-12-07 Qualcomm Incorporated Method and apparatus for performing mobile assisted hard handoff between communication systems
WO1998049859A1 (en) * 1997-04-30 1998-11-05 Qualcomm Incorporated A method of and apparatus for tracking propagation delay between a base station and a subscriber unit
US5974318A (en) * 1997-07-09 1999-10-26 Northern Telecom Limited Method and system for increasing capacity and improving performance of a cellular network
JP2945357B2 (en) * 1997-07-19 1999-09-06 松下電器産業株式会社 Mobile station device and control station device of CDMA system
US6038448A (en) * 1997-07-23 2000-03-14 Nortel Networks Corporation Wireless communication system having hand-off based upon relative pilot signal strengths
US6078570A (en) * 1997-08-21 2000-06-20 Nokia Mobile Phones Limited Mobile assisted hard hand-off for a code division multiple access (CDMA) system
US6097954A (en) * 1997-08-29 2000-08-01 Lucent Technologies, Inc. Method for performing a soft handoff
US6122513A (en) * 1997-11-06 2000-09-19 Nortel Networks Corporation Method for extending hard-handoff boundaries within a mobile telephone communications network
KR100252932B1 (en) * 1997-11-06 2000-04-15 서평원 Method and System for Providing a Inter-frequency Handoff in a CDMA Cellular Telephone System
US6173181B1 (en) * 1997-11-07 2001-01-09 Motorola, Inc. Method and system for controlling neighbor scanning in a subscriber unit in a cellular communication system
FR2771583B1 (en) * 1997-11-27 2004-09-24 Alsthom Cge Alkatel METHOD FOR COOPERATION BETWEEN ENTITIES OF A CELLULAR MOBILE RADIO COMMUNICATIONS NETWORK, DURING HANDOVER COMMUNICATION TRANSFERS
EP1641141B1 (en) * 1997-12-10 2009-03-25 Mitsubishi Denki Kabushiki Kaisha Transmission power and data rate based communication control method for a mobile communication system
US6507741B1 (en) * 1997-12-17 2003-01-14 Nortel Networks Limited RF Repeater with delay to improve hard handoff performance
US6044271A (en) * 1997-12-23 2000-03-28 Ericsson Inc. System and method for handing off a cellular call with system and capability change indication
KR100256957B1 (en) * 1997-12-26 2000-05-15 윤종용 Hard hand-off processing method and device
US6075989A (en) * 1998-01-20 2000-06-13 Motorola, Inc. Method and apparatus for determining a need to handoff a mobile communication signal in a wireless communication system
US6603751B1 (en) * 1998-02-13 2003-08-05 Qualcomm Incorporated Method and system for performing a handoff in a wireless communication system, such as a hard handoff
KR100277101B1 (en) * 1998-02-17 2001-01-15 윤종용 Method for performing hard handoff between central offices in code division multiple access network
US6289211B1 (en) * 1998-03-26 2001-09-11 Erksson Inc Method for determining the position of a mobile station
JPH11355831A (en) * 1998-04-10 1999-12-24 Nec Corp Hand-off method to different communication-type cellular system base station in cdma cellular system, and the cellular system
US6934546B1 (en) * 1998-04-30 2005-08-23 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for control of soft handoff usage in radiocommunication systems
US6266529B1 (en) * 1998-05-13 2001-07-24 Nortel Networks Limited Method for CDMA handoff in the vicinity of highly sectorized cells
US20030194033A1 (en) * 1998-05-21 2003-10-16 Tiedemann Edward G. Method and apparatus for coordinating transmission of short messages with hard handoff searches in a wireless communications system
KR100291476B1 (en) * 1998-05-25 2001-07-12 윤종용 A method and a system for controlling a pilot measurement request order in cellular system
US6216004B1 (en) * 1998-06-23 2001-04-10 Qualcomm Incorporated Cellular communication system with common channel soft handoff and associated method
KR100311506B1 (en) * 1998-11-04 2001-11-15 서평원 HandOff Control Method in Mobile Communication System
US6571096B2 (en) * 1998-11-12 2003-05-27 Fujitsu Limited Method and device for preventing toggling between two zones of a wireless communications network
FI109956B (en) * 1998-12-16 2002-10-31 Nokia Corp Procedure for communication of neighbor cell information and systems according to methods and mobile telephone
US6621811B1 (en) * 1999-02-02 2003-09-16 Nortel Networks Limited Method and system for generating multiple pilot beacons of different frequencies from a single pilot beacon
US6587446B2 (en) 1999-02-11 2003-07-01 Qualcomm Incorporated Handoff in a wireless communication system
KR100288382B1 (en) * 1999-03-15 2001-04-16 윤종용 method and apparatus for inter MSC soft handoff using router in CDMA
US6556551B1 (en) 1999-05-27 2003-04-29 Lgc Wireless, Inc. Multi-frequency pilot beacon for CDMA systems
US6611507B1 (en) 1999-07-30 2003-08-26 Nokia Corporation System and method for effecting information transmission and soft handoff between frequency division duplex and time division duplex communications systems
EP1081977A1 (en) * 1999-08-31 2001-03-07 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Subscriber station, network control means and method for triggering inter-frequency measurements in a mobile communication system
EP1081979A1 (en) 1999-08-31 2001-03-07 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Subscriber station, network control means and method for carrying out inter-frequency measurements in a mobile communication system
US7072698B2 (en) * 1999-09-13 2006-07-04 Skyworks Solutions, Inc. Directional antenna for hand-held wireless communications device
US6845238B1 (en) * 1999-09-15 2005-01-18 Telefonaktiebolaget Lm Ericsson (Publ) Inter-frequency measurement and handover for wireless communications
US6600917B1 (en) 1999-10-04 2003-07-29 Telefonaktiebolaget Lm Ericsson (Publ) Telecommunications network broadcasting of service capabilities
US7072311B1 (en) * 1999-10-12 2006-07-04 Via Telecom Co., Ltd. Method and apparatus for initiating a reverse link intergenerational handoff in a CDMA communication system
JP3950602B2 (en) * 1999-12-06 2007-08-01 株式会社日立コミュニケーションテクノロジー Mobile communication system, handover control apparatus, and handover method thereof
DE10010958A1 (en) * 2000-03-06 2001-09-20 Siemens Ag Intersystem relaying method enabling efficient and reliable relaying - involves initiating transmission quality measurement for transmission to base station in second communications system if threshold not reached in first system
DE60132078T2 (en) 2000-03-29 2008-12-24 OpenCell Corp., Houston OPERATING AND MAINTENANCE ARCHITECTURE FOR A DISTRIBUTED MULTIPROTOCOL SYSTEM
US6775252B1 (en) * 2000-03-31 2004-08-10 Qualcomm, Inc. Dynamic adjustment of search window size in response to signal strength
US6535739B1 (en) 2000-04-07 2003-03-18 Qualcomm Incorporated Method of handoff within a telecommunications system containing digital base stations with different spectral capabilities
US7130285B2 (en) * 2000-04-12 2006-10-31 Samsung Electronics Co., Ltd. Method for providing concurrent service handoff in a mobile communication system
US6826161B1 (en) 2000-07-20 2004-11-30 Telefonaktiebolaget Lm Ericsson (Publ) Slewing detector system and method for the introduction of hysteresis into a hard handoff decision
US7016331B1 (en) * 2000-09-05 2006-03-21 Cisco Technology, Inc. Method of handoff control in an enterprise code division multiple access wireless system
US6901061B1 (en) * 2000-09-05 2005-05-31 Cisco Technology, Inc. Handoff control in an enterprise division multiple access wireless system
AU2002211636A1 (en) * 2000-10-13 2002-04-22 Repeater Technologies Microcell delay-sectorization system for cdma base transmitter site
KR100354168B1 (en) 2000-10-31 2002-09-27 엘지전자 주식회사 Method and system for handoff communication mobile CDMA
FR2816799B1 (en) * 2000-11-16 2003-02-07 Cit Alcatel METHOD FOR THE TRANSFER OF INTER-SYSTEM COMMUNICATION IN A CELLULAR SYSTEM OF MOBILE RADIOCOMMUNICATIONS
EP1410513A4 (en) 2000-12-29 2005-06-29 Infineon Technologies Ag Channel codec processor configurable for multiple wireless communications standards
US6961545B2 (en) 2001-04-09 2005-11-01 Atheros Communications, Inc. Method and system for providing antenna diversity
US7181218B2 (en) * 2001-04-10 2007-02-20 Telefonaktiebolaget Lm Ericsson (Publ) Commanding handover between differing radio access technologies
CN1448038A (en) * 2001-06-14 2003-10-08 三菱电机株式会社 Communication traffic control method
WO2003003615A1 (en) * 2001-06-27 2003-01-09 Nokia Corporation Methods for determining times and changes of times of transmission, radio communications system and processor
KR100425094B1 (en) 2001-07-02 2004-03-30 엘지전자 주식회사 structure of a detachable battery pack for a mobile phone
US6944147B2 (en) * 2001-12-10 2005-09-13 Nortel Networks Limited System and method for maximizing capacity in a telecommunications system
JP4041733B2 (en) * 2002-12-19 2008-01-30 株式会社エヌ・ティ・ティ・ドコモ Transmission power control method and control apparatus
US7583633B2 (en) * 2003-02-28 2009-09-01 Telefonaktiebolaget Lm Ericsson (Publ) Hard handoff target generation in a multi-frequency CDMA mobile network
CN100556178C (en) * 2003-06-12 2009-10-28 富士通株式会社 Base station apparatus and mobile communication system
CN101695185B (en) * 2003-06-12 2013-10-16 富士通株式会社 Mobile communication system and wireless communication system
CN1316851C (en) * 2003-06-25 2007-05-16 诺基亚公司 Parameter selection optimization for handover
US7181220B2 (en) * 2003-09-24 2007-02-20 Intel Corporation Seamless roaming apparatus, systems, and methods
US7212821B2 (en) * 2003-12-05 2007-05-01 Qualcomm Incorporated Methods and apparatus for performing handoffs in a multi-carrier wireless communications system
US7047009B2 (en) * 2003-12-05 2006-05-16 Flarion Technologies, Inc. Base station based methods and apparatus for supporting break before make handoffs in a multi-carrier system
US7164915B2 (en) * 2003-12-19 2007-01-16 Interdigital Technology Corporation Handover in a wireless local area network (WLAN)
US7050804B1 (en) 2004-01-13 2006-05-23 Sprint Spectrum L.P. Method and system for improving mobile communication handoffs using pilot beacons
US7680074B2 (en) * 2004-07-09 2010-03-16 Cisco Technology, Inc. Method and apparatus for optimizing cell operation toward better speech quality in wireless packet-switching networks
US7693521B1 (en) 2004-08-04 2010-04-06 Sprint Spectrum L.P. Method and system for mobile station handoff
US7302265B1 (en) 2005-03-16 2007-11-27 Sprint Spectrum L.P. Method of selecting carrier frequency for call origination
JP4588617B2 (en) * 2005-11-24 2010-12-01 京セラ株式会社 Wireless communication terminal, wireless communication system, and wireless base station selection method
JP4703656B2 (en) * 2005-12-27 2011-06-15 富士通株式会社 Mobility control apparatus and handover control method
US8920343B2 (en) 2006-03-23 2014-12-30 Michael Edward Sabatino Apparatus for acquiring and processing of physiological auditory signals
US8688809B2 (en) * 2006-09-07 2014-04-01 Airvana Lp Provisioning private access points for wireless networking
JP4787720B2 (en) 2006-10-30 2011-10-05 Ｎｅｃインフロンティア株式会社 Wireless base station, wireless communication system, communication control method, and communication control program
US8229498B2 (en) * 2006-12-28 2012-07-24 Airvana, Corp. Assigning code space to portable base stations
CN101031146B (en) * 2007-03-23 2010-10-27 华为技术有限公司 Method, apparatus and system for switching network
US8964692B2 (en) 2008-11-10 2015-02-24 Qualcomm Incorporated Spectrum sensing of bluetooth using a sequence of energy detection measurements
EP2207382B1 (en) * 2009-01-08 2015-04-01 Alcatel Lucent Method for prioritizing handover targets for scanning by a mobile terminal in a wireless network
US9001811B2 (en) 2009-05-19 2015-04-07 Adc Telecommunications, Inc. Method of inserting CDMA beacon pilots in output of distributed remote antenna nodes
KR101618283B1 (en) * 2009-05-22 2016-05-04 삼성전자주식회사 Method of information feedback for coordinated multiple point communications
US8391870B1 (en) * 2010-05-20 2013-03-05 Sprint Communications Company L.P. Wireless handoffs based upon past handoff metrics
WO2016003516A2 (en) * 2014-04-10 2016-01-07 Massachusetts Institute Of Technology Radio frequency localization
CN112218347B (en) * 2020-09-27 2022-09-16 Oppo广东移动通信有限公司 Method and device for inhibiting inter-system ping-pong, terminal equipment and storage medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5267261A (en) * 1992-03-05 1993-11-30 Qualcomm Incorporated Mobile station assisted soft handoff in a CDMA cellular communications system
WO1996012380A1 (en) * 1994-10-16 1996-04-25 Qualcomm Incorporated Method and apparatus for handoff between different cellular communications systems
WO1996031078A1 (en) * 1995-03-30 1996-10-03 Qualcomm Incorporated Method and apparatus for mobile unit assisted cdma to alternative system hard handoff

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US5109390A (en) * 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
US5267262A (en) * 1989-11-07 1993-11-30 Qualcomm Incorporated Transmitter power control system
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
US5367533A (en) * 1990-12-05 1994-11-22 Interdigital Technology Corporation Dynamic capacity allocation CDMA spread spectrum communications
US5164958A (en) * 1991-05-22 1992-11-17 Cylink Corporation Spread spectrum cellular handoff method
US5195090A (en) * 1991-07-09 1993-03-16 At&T Bell Laboratories Wireless access telephone-to-telephone network interface architecture
CA2066538C (en) * 1991-07-09 1997-12-23 Brian David Bolliger Mobile-telephone system call processing arrangement
US5184347A (en) * 1991-07-09 1993-02-02 At&T Bell Laboratories Adaptive synchronization arrangement
AU2869892A (en) * 1991-12-11 1993-07-19 Motorola, Inc. Handover decision algorithm using power budget values
US5327575A (en) * 1992-03-23 1994-07-05 Motorola, Inc. Directional handover control in digital mobile radio systems employing MAHO
US5295153A (en) * 1992-04-13 1994-03-15 Telefonaktiebolaget L M Ericsson CDMA frequency allocation
US5438565A (en) * 1993-03-31 1995-08-01 At&T Corp. Packet switch to provide code division, multiple access cellular service
US5448754A (en) * 1993-05-07 1995-09-05 Corporate Technology Partners Radio frequency sharing personal communications system
US5432843A (en) * 1993-08-02 1995-07-11 Motorola Inc. Method of performing handoff in a cellular communication system
US5412658A (en) * 1993-10-22 1995-05-02 Bell Communications Research, Inc. Beacon detection method and apparatus for sharing spectrum between wireless communications systems and fixed microwave systems
US5577022A (en) * 1994-11-22 1996-11-19 Qualcomm Incorporated Pilot signal searching technique for a cellular communications system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5267261A (en) * 1992-03-05 1993-11-30 Qualcomm Incorporated Mobile station assisted soft handoff in a CDMA cellular communications system
WO1996012380A1 (en) * 1994-10-16 1996-04-25 Qualcomm Incorporated Method and apparatus for handoff between different cellular communications systems
WO1996031078A1 (en) * 1995-03-30 1996-10-03 Qualcomm Incorporated Method and apparatus for mobile unit assisted cdma to alternative system hard handoff

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HOLCMAN A R ET AL: "CDMA INTERSYSTEM OPERATIONS", PROCEEDINGS OF THE VEHICULAR TECHNOLOGY CONFERENCE, STOCKHOLM, JUNE 8 - 10, 1994, vol. 1, 8 June 1994 (1994-06-08), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 590 - 594, XP000496745 *

Also Published As

Publication number Publication date
CN1968525A (en) 2007-05-23
AU3372297A (en) 1997-12-09
EP0951793B1 (en) 2008-01-16
EP0951793A2 (en) 1999-10-27
FI982520A (en) 1999-01-22
ATE509490T1 (en) 2011-05-15
AU717479B2 (en) 2000-03-30
ES2299185T3 (en) 2008-05-16
CN1561140A (en) 2005-01-05
ATE384410T1 (en) 2008-02-15
FI982520A0 (en) 1998-11-20
CN1225786A (en) 1999-08-11
BR9712089A (en) 1999-08-31
CN1297175C (en) 2007-01-24
JP3933696B2 (en) 2007-06-20
EP1492373A2 (en) 2004-12-29
CN100592818C (en) 2010-02-24
US5848063A (en) 1998-12-08
WO1997044984A2 (en) 1997-11-27
EP1492373B1 (en) 2011-05-11
HK1023676A1 (en) 2000-09-15
IL127199A0 (en) 1999-09-22
CA2256425A1 (en) 1997-11-27
EP1492373A3 (en) 2006-05-31
RU98123191A (en) 2000-09-27
DE69738471T2 (en) 2008-11-13
DE69738471D1 (en) 2008-03-06
CN1215736C (en) 2005-08-17
JP2000511380A (en) 2000-08-29

Similar Documents

Publication Publication Date Title
WO1997044984A3 (en) Method and apparatus for hard handoff in a cdma system
WO1997044970A3 (en) Method and apparatus for measurement directed hard handoff in a cdma system
WO1997044969A3 (en) Method and apparatus for providing a cone of silence in a cellular communication system
CA2356076A1 (en) Soft handoff in a cdma cellular telephone system
WO1998009457A3 (en) Private multiplexing cellular network
TW361021B (en) Method and apparatus for providing diversity in hard handoff for a CDMA system
EP1784040A3 (en) Method and apparatus for detecting forward and reverse link imbalance in digital cellular communication systems
CA2247357A1 (en) Method for handover
CA2317787A1 (en) Method for reconnection of a dropped call in mobile communication system
WO1998006230A3 (en) Method and apparatus for reliable intersystem handoff in a cdma system
NO980874L (en) Method of handover, as well as cellular radio system
CA2273485A1 (en) Apparatus and method for controlling communications in a multi-network, wireless communication system
CA2328352A1 (en) Power control apparatus and method for inter-frequency handoff in cdma communication system
EP0898382A3 (en) Switching and power control method and apparatus for wireless telecommunications
WO1998027776A3 (en) Method for hard handoff in a cdma cellular environment
MY130059A (en) Low capacity mobile assisted handoff in a cellular communications network.
WO2002051234A3 (en) Adaptive selection of a handoff thereshold in a radio communication system
AU3087500A (en) Method and means for telecom
CA2295555A1 (en) Handoff method in a mobile communication system supporting transmission diversity
WO1997047148A3 (en) Using a signal with increased power for determining the position of a mobile subscriber in a cdma cellular telephone system
EP0948144A3 (en) IS-95, W-CDMA base station apparatus, mobile communication system and frequency sharing method with transmission power control
EP0964599A3 (en) Handing off a wireless terminal without changing active channels
GB2364207B (en) Radio access traffic management
EP0954120A4 (en) Radiocommunication system and method therefor

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 97196164.6

Country of ref document: CN

AK Designated states

Kind code of ref document: A2

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG

AK Designated states

Kind code of ref document: A3

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref document number: 2256425

Country of ref document: CA

Ref document number: 2256425

Country of ref document: CA

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 982520

Country of ref document: FI

WWE Wipo information: entry into national phase

Ref document number: 1199800966

Country of ref document: VN

WWE Wipo information: entry into national phase

Ref document number: PA/a/1998/009788

Country of ref document: MX

Ref document number: 1019980709453

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 1997929732

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWP Wipo information: published in national office

Ref document number: 1997929732

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1019980709453

Country of ref document: KR

WWG Wipo information: grant in national office

Ref document number: 1019980709453

Country of ref document: KR

WWG Wipo information: grant in national office

Ref document number: 1997929732

Country of ref document: EP