CA2216225A1 - System, method and apparatus for soft handoff - Google Patents

System, method and apparatus for soft handoff

Info

Publication number
CA2216225A1
CA2216225A1 CA2216225A CA2216225A CA2216225A1 CA 2216225 A1 CA2216225 A1 CA 2216225A1 CA 2216225 A CA2216225 A CA 2216225A CA 2216225 A CA2216225 A CA 2216225A CA 2216225 A1 CA2216225 A1 CA 2216225A1
Authority
CA
Canada
Prior art keywords
pilot signal
signal strengths
soft handoff
base station
current measured
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
CA2216225A
Other languages
French (fr)
Other versions
CA2216225C (en
Inventor
William Daniel Willey
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.)
Google Technology Holdings LLC
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of CA2216225A1 publication Critical patent/CA2216225A1/en
Application granted granted Critical
Publication of CA2216225C publication Critical patent/CA2216225C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H04W36/00692—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO]

Abstract

.

A wireless communication device (100) continues to measure pilot signal strengths while in the System Access State (220) and provides at least one of the current measured pilot signal strengths to the base station in each access probe (210). A base station (102) receives the current information on pilot signal strengths (305; 320) and the system specifies the base stations for soft handoff according to the current measured pilot signal strengths (315; 340).
CA002216225A 1996-10-11 1997-09-23 System, method and apparatus for soft handoff Expired - Lifetime CA2216225C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/728,727 US5920550A (en) 1996-10-11 1996-10-11 System, method, and apparatus for soft handoff
US08/728,727 1996-10-11

Publications (2)

Publication Number Publication Date
CA2216225A1 true CA2216225A1 (en) 1998-04-11
CA2216225C CA2216225C (en) 2001-01-30

Family

ID=24928056

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002216225A Expired - Lifetime CA2216225C (en) 1996-10-11 1997-09-23 System, method and apparatus for soft handoff

Country Status (9)

Country Link
US (1) US5920550A (en)
JP (1) JP3762069B2 (en)
KR (1) KR100262923B1 (en)
CN (1) CN1114325C (en)
AR (1) AR008480A1 (en)
BR (1) BR9706522A (en)
CA (1) CA2216225C (en)
DE (1) DE19744177B4 (en)
GB (1) GB2318256B (en)

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US5797092A (en) * 1994-04-28 1998-08-18 Metro One Telecommunications, Inc. Method for monitoring the connection between the subscriber and the destination telephone and providing directory assistance upon detection of predetermined tone
US5854785A (en) * 1996-12-19 1998-12-29 Motorola, Inc. System method and wireless communication device for soft handoff
KR100214293B1 (en) * 1997-05-29 1999-08-02 윤종용 Soft swap handoff for cdma cellular system
KR100265584B1 (en) * 1997-07-22 2000-09-15 정태기 Method of handoff control in the mobile communication system
US6104927A (en) * 1998-05-28 2000-08-15 Motorola, Inc. Communication system, mobile station, and method for mobile station registration
US6208858B1 (en) * 1998-07-21 2001-03-27 Qualcomm Incorporated System and method for reducing call dropping rates in a multi-beam communication system
KR20000014143A (en) * 1998-08-14 2000-03-06 서평원 Improved method of transmitting pilot strength measurement message in communication system
US6633554B1 (en) * 1998-09-01 2003-10-14 Samsung Electronics Co., Ltd. System and method for soft handoff setup during system access idle handoff in a wireless network
US6553017B1 (en) * 1998-09-02 2003-04-22 Motorola, Inc. Communication device and method for determining the signal quality of communication resources in a communication system
US6785249B2 (en) * 1998-10-05 2004-08-31 Qualcomm, Incorporated Method and apparatus for detecting forward and reverse link imbalance in digital cellular communication systems
JP2000151504A (en) * 1998-11-18 2000-05-30 Nec Saitama Ltd Base station radio terminal and its control method
JP3750390B2 (en) * 1999-01-08 2006-03-01 日本電気株式会社 Call control method and system in mobile communication
US6574267B1 (en) 1999-03-22 2003-06-03 Golden Bridge Technology, Inc. Rach ramp-up acknowledgement
US6606341B1 (en) 1999-03-22 2003-08-12 Golden Bridge Technology, Inc. Common packet channel with firm handoff
MY128734A (en) * 1999-03-22 2007-02-28 Golden Bridge Tech Inc Common packet channel
JP2000354267A (en) 1999-04-07 2000-12-19 Toshiba Corp Mobile communication terminal provided with handover request function, handover controller, handover control method and storage medium storing handover control method
US6549787B1 (en) * 1999-04-26 2003-04-15 Samsung Electronics Co., Ltd. System and method for use in an MSC-BS interface for supporting an access state handoff
US6253083B1 (en) * 1999-07-21 2001-06-26 Lucent Technologies Inc. Mobile switching center for providing wireless access Ho
US6320855B1 (en) * 1999-09-09 2001-11-20 Qualcom Incorporated Method and system for initiating idle handoff in a wireless communications system
US6675015B1 (en) * 1999-09-15 2004-01-06 Nokia Corporation Apparatus, and associated method, for facilitating communication handovers in a bluetooth-public-access radio communication system
JP3525828B2 (en) 1999-11-01 2004-05-10 株式会社日立製作所 Location registration control method and mobile station device using the same
JP3454775B2 (en) * 2000-03-29 2003-10-06 三洋電機株式会社 Mobile station and handoff method for CDMA communication system
GB2362785B (en) 2000-05-27 2004-05-05 Motorola Inc Communication system and method of administering connections therein
KR100459564B1 (en) * 2000-06-21 2004-12-03 삼성전자주식회사 apparatus and method for reporting service load to mobile station in mobile communication system
DE10031065B4 (en) * 2000-06-26 2005-07-07 Siemens Ag Method and radio station for signaling information in a radio communication system
US20020068566A1 (en) * 2000-12-04 2002-06-06 Jonas Ohlsson Preliminary performance of handover function in telecommunications system
US7180879B2 (en) * 2001-08-17 2007-02-20 Ragulan Sinnarajah Method and apparatus for call setup latency reduction
US6717924B2 (en) * 2002-01-08 2004-04-06 Qualcomm Incorporated Control-hold mode
KR100451192B1 (en) * 2002-05-30 2004-10-02 엘지전자 주식회사 Cell reselection method for radio communication network
FR2846183B1 (en) * 2002-10-21 2005-01-14 Evolium Sas METHOD AND DEVICE FOR MANAGING RESOURCE CHANGES IN A COMMUNICATIONS NETWORK
US20050085230A1 (en) * 2003-10-16 2005-04-21 Motorola, Inc. Circuit and method for producing a pilot strength measurement message
JP4525207B2 (en) * 2004-06-25 2010-08-18 株式会社日立製作所 Wireless communication system
US8000302B2 (en) 2005-06-23 2011-08-16 Qualcomm Incorporated Adaptive multi-channel modem
KR100706519B1 (en) * 2005-12-07 2007-04-12 엘지전자 주식회사 Method for maintaining call connection of mobile communication terminal and the mobile communication terminal therefor
US8290524B2 (en) * 2007-01-17 2012-10-16 Qualcomm Incorporated Systems and methods for maintaining a transmission during a channel fade
US8194617B2 (en) 2007-10-05 2012-06-05 Qualcomm Incorporated Method and apparatus for increasing efficiency of data packet transmission
US7957705B1 (en) 2008-03-18 2011-06-07 Sprint Spectrum L.P. System and method for reducing radio frequency interference caused by a carrier
CN101686557B (en) 2008-09-22 2014-04-02 华为技术有限公司 Method and device for sending multi-cell scheduling information and user equipment
IL242353B (en) * 2015-10-29 2021-01-31 Verint Systems Ltd System and method for soft failovers for proxy servers

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4479215A (en) * 1982-09-24 1984-10-23 General Electric Company Power-line carrier communications system with interference avoidance capability
US5109390A (en) * 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone 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
US5610595A (en) * 1991-12-09 1997-03-11 Intermec Corporation Packet radio communication system protocol
US5267261A (en) * 1992-03-05 1993-11-30 Qualcomm Incorporated Mobile station assisted soft handoff in a CDMA cellular communications system
EP0917308A1 (en) * 1992-04-17 1999-05-19 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Mobile assisted handover using CDMA
US5699367A (en) * 1995-12-29 1997-12-16 Telefonaktiebolaget Lm Ericsson Concatenated error detection coding and packet numbering for hierarchical ARQ schemes

Also Published As

Publication number Publication date
AR008480A1 (en) 2000-01-19
DE19744177A1 (en) 1998-04-23
DE19744177B4 (en) 2005-11-17
GB2318256B (en) 2001-08-08
CA2216225C (en) 2001-01-30
KR100262923B1 (en) 2000-08-01
JP3762069B2 (en) 2006-03-29
CN1114325C (en) 2003-07-09
KR19980032721A (en) 1998-07-25
JPH10136428A (en) 1998-05-22
CN1179682A (en) 1998-04-22
US5920550A (en) 1999-07-06
BR9706522A (en) 2001-06-05
GB2318256A (en) 1998-04-15
GB9720005D0 (en) 1997-11-19

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20170925

MKEX Expiry

Effective date: 20170925