WO1998036607A3 - Method of and apparatus for avoiding lost communication with a mobile station - Google Patents

Method of and apparatus for avoiding lost communication with a mobile station Download PDF

Info

Publication number
WO1998036607A3
WO1998036607A3 PCT/US1998/003148 US9803148W WO9836607A3 WO 1998036607 A3 WO1998036607 A3 WO 1998036607A3 US 9803148 W US9803148 W US 9803148W WO 9836607 A3 WO9836607 A3 WO 9836607A3
Authority
WO
WIPO (PCT)
Prior art keywords
mobile station
handoff
hard handoff
inter
communication
Prior art date
Application number
PCT/US1998/003148
Other languages
French (fr)
Other versions
WO1998036607A2 (en
Inventor
Edward B Tiedemann Jr
Tao Chen
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 EP98907512A priority Critical patent/EP0962115B1/en
Priority to KR10-1999-7007445A priority patent/KR100530729B1/en
Priority to AU63299/98A priority patent/AU6329998A/en
Priority to DE69836538T priority patent/DE69836538T2/en
Priority to JP53601198A priority patent/JP4108759B2/en
Publication of WO1998036607A2 publication Critical patent/WO1998036607A2/en
Publication of WO1998036607A3 publication Critical patent/WO1998036607A3/en
Priority to HK00103337A priority patent/HK1025004A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • 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
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • 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
    • H04W36/00835—Determination of neighbour cell lists
    • 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
    • H04W36/008375—Determination of triggering parameters for hand-off based on historical 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
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment

Abstract

A method and apparatus for performing inter-system hard handoff between communication systems or inter-frequency hard handoff within a CDMA communication reduce the probability of dropped calls during inter-system hard handoff. In the event that a hard handoff attempt is unsuccessful, the mobile station (M3) will return to the original system (S1) with information which the communication system of the present invention uses to assist in the performance of future handoff attempts. Alternatively, with no handoff attempt made, the mobile station (M3) monitors the destination system (S2) then returns to the original system (S1) with information used to assist in subsequent handoff attempts. The information returned from monitoring a CDMA system consists of results of a search for one or more pilots given at offsets in a specific list provided to the mobile station by the base station or a set of offsets based upon a predetermined search algorithm.
PCT/US1998/003148 1997-02-18 1998-02-18 Method of and apparatus for avoiding lost communication with a mobile station WO1998036607A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP98907512A EP0962115B1 (en) 1997-02-18 1998-02-18 Method of and apparatus for avoiding lost communication with a mobile station
KR10-1999-7007445A KR100530729B1 (en) 1997-02-18 1998-02-18 Method of and apparatus for avoiding lost communication with a mobile station
AU63299/98A AU6329998A (en) 1997-02-18 1998-02-18 Method of and apparatus for avoiding lost communication with a mobile station
DE69836538T DE69836538T2 (en) 1997-02-18 1998-02-18 METHOD AND DEVICE FOR AVOIDING COMMUNICATION LOSS WITH A MOBILE STATION
JP53601198A JP4108759B2 (en) 1997-02-18 1998-02-18 Method and apparatus for avoiding loss of communication with mobile station
HK00103337A HK1025004A1 (en) 1997-02-18 2000-06-01 Method of and apparatus for avoiding lost communication with a mobile station

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/816,746 US5999816A (en) 1997-02-18 1997-02-18 Method and apparatus for performing mobile assisted hard handoff between communication systems
US816,746 1997-02-18

Publications (2)

Publication Number Publication Date
WO1998036607A2 WO1998036607A2 (en) 1998-08-20
WO1998036607A3 true WO1998036607A3 (en) 1998-12-30

Family

ID=25221504

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/003148 WO1998036607A2 (en) 1997-02-18 1998-02-18 Method of and apparatus for avoiding lost communication with a mobile station

Country Status (14)

Country Link
US (1) US5999816A (en)
EP (4) EP2229026B1 (en)
JP (3) JP4108759B2 (en)
KR (1) KR100530729B1 (en)
CN (1) CN1136753C (en)
AR (1) AR011831A1 (en)
AT (3) ATE347241T1 (en)
AU (1) AU6329998A (en)
DE (2) DE69836538T2 (en)
ES (3) ES2298907T3 (en)
HK (1) HK1025004A1 (en)
TW (1) TW421937B (en)
WO (1) WO1998036607A2 (en)
ZA (1) ZA981291B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8964692B2 (en) 2008-11-10 2015-02-24 Qualcomm Incorporated Spectrum sensing of bluetooth using a sequence of energy detection measurements

Families Citing this family (121)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259349B4 (en) * 1978-02-01 2005-05-04 Intel Corporation, Santa Clara Portable communication device that enables a wireless network to communicate with another wireless network, and associated method
US6157668A (en) * 1993-10-28 2000-12-05 Qualcomm Inc. Method and apparatus for reducing the average transmit power of a base station
US6678311B2 (en) 1996-05-28 2004-01-13 Qualcomm Incorporated High data CDMA wireless communication system using variable sized channel codes
FI109510B (en) * 1997-02-28 2002-08-15 Nokia Corp Handover and call set-up in a mobile communication system
JP2990098B2 (en) * 1997-05-21 1999-12-13 埼玉日本電気株式会社 Terminal-driven mobile communication system
SE509836C2 (en) * 1997-06-13 1999-03-15 Ericsson Telefon Ab L M Procedure and arrangement in a radio communication system
US6304562B1 (en) * 1997-06-26 2001-10-16 Samsung Electronics Co., Ltd. Asymmetric forward power control in a CDMA communication
JP3019061B2 (en) 1997-06-27 2000-03-13 日本電気株式会社 Mobile communication system and radio channel control method therefor
US6665281B1 (en) 1997-11-06 2003-12-16 Lg Information & Communications, Ltd. Method and system for providing inter-frequency handoff in a telephone system
KR100252932B1 (en) * 1997-11-06 2000-04-15 서평원 Method and System for Providing a Inter-frequency Handoff in a CDMA Cellular Telephone System
US6625132B1 (en) 1997-11-13 2003-09-23 Nortel Networks Ltd Idle intersystem roaming determination and system reselection in a CDMA wireless communication system
US6115754A (en) * 1997-12-29 2000-09-05 Nortel Networks Limited System and method for appending location information to a communication sent from a mobile terminal operating in a wireless communication system to an internet server
KR100304924B1 (en) * 1997-12-30 2001-11-22 서평원 Inter-frequency handoff control method in cdma cellular 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
US6252861B1 (en) * 1998-03-26 2001-06-26 Lucent Technologies, Inc. Methods and apparatus for interfrequency handoff in a wireless communication system
US6181943B1 (en) 1998-03-30 2001-01-30 Lucent Technologies Inc. Method and apparatus for inter-frequency hand-off in wireless communication systems
US6553064B1 (en) * 1998-05-07 2003-04-22 Qualcomm Incorporated Method and apparatus for performing mobile station assisted hard handoff using error correction codes
US6266529B1 (en) * 1998-05-13 2001-07-24 Nortel Networks Limited Method for CDMA handoff in the vicinity of highly sectorized cells
KR100291279B1 (en) * 1998-05-15 2001-06-01 박종섭 Device for controlling digital auto gain
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
US6216004B1 (en) * 1998-06-23 2001-04-10 Qualcomm Incorporated Cellular communication system with common channel soft handoff and associated method
US6480721B1 (en) 1998-07-10 2002-11-12 Siemens Information And Communication Mobile Llc Method and system for avoiding bad frequency subsets in a frequency hopping cordless telephone system
US6865173B1 (en) * 1998-07-13 2005-03-08 Infineon Technologies North America Corp. Method and apparatus for performing an interfrequency search
JP2933615B1 (en) * 1998-07-15 1999-08-16 静岡日本電気株式会社 Channel switching decision device in digital cordless
KR100308661B1 (en) * 1998-08-28 2001-10-19 윤종용 Hand-off apparatus and method of mobile comunication system
US6188900B1 (en) * 1998-08-31 2001-02-13 Texas Instruments Incorporated Mobile device assisted handoff system for code division multiple access and wideband code division multiple access networks
KR20000019105A (en) * 1998-09-08 2000-04-06 정장호 Hard handoff method between frequency assignments in cdma mobile communication system
KR100291478B1 (en) * 1998-09-08 2001-06-01 윤종용 Method and system for idle handoff in cellular system
SE516058C2 (en) * 1998-09-22 2001-11-12 Telia Ab Improvements to, or with regard to, roaming in mobile communications networks
SE514808C2 (en) * 1998-10-07 2001-04-30 Telia Ab Method of obtaining information about cells in a first cellular cellular network in a first cellular cellular network
DE69837333T2 (en) * 1998-10-19 2007-12-20 Nortel Matra Cellular A method and apparatus for establishing a radio connection with a destination base station in a cellular or wireless mobile communication system
US6166622A (en) * 1998-10-28 2000-12-26 Texas Instruments Incorporated Time slot structure for improved TPC estimation in WCDMA
US7596378B1 (en) 1999-09-30 2009-09-29 Qualcomm Incorporated Idle mode handling in a hybrid GSM/CDMA network
US6567666B2 (en) * 1998-12-02 2003-05-20 Infineon Technologies North America Corp. Forward link inter-generation soft handoff between 2G and 3G CDMA systems
FI107773B (en) * 1998-12-11 2001-09-28 Nokia Mobile Phones Ltd Set handover timing
JP2000201101A (en) * 1999-01-07 2000-07-18 Fujitsu Ltd Spread spectrum communication system and its mobile unit
DE19900436B4 (en) 1999-01-08 2016-12-01 Ipcom Gmbh & Co. Kg Handover method, mobile station for handover and base station for handover
US6788685B1 (en) * 1999-01-28 2004-09-07 Qualcomm, Incorporated Method and apparatus for controlling transmission power in a CDMA communication system
US6424834B1 (en) * 1999-02-02 2002-07-23 Nortel Networks Corporation Precision hard handoff method using pilot beacon distributors
US6587446B2 (en) 1999-02-11 2003-07-01 Qualcomm Incorporated Handoff in a wireless communication system
USRE47895E1 (en) 1999-03-08 2020-03-03 Ipcom Gmbh & Co. Kg Method of allocating access rights to a telecommunications channel to subscriber stations of a telecommunications network and subscriber station
JP3448000B2 (en) * 1999-03-16 2003-09-16 株式会社ハイニックスセミコンダクター Method of extending communication area of mobile communication system and method of processing call between communication areas
US7778641B1 (en) 1999-04-06 2010-08-17 Telefonaktiebolaget L M Ericsson (Publ) Inter-system handover—generic handover mechanism
US6226283B1 (en) * 1999-05-13 2001-05-01 Motorola, Inc. Method and selector for performing selection in a communication system
US6597922B1 (en) * 1999-05-14 2003-07-22 Qualcomm Incorporated Method and apparatus for efficient candidate frequency search while initiating a handoff in a code division multiple access communication system
US6961583B2 (en) * 1999-05-24 2005-11-01 Samsung Electronics Co., Ltd. Wireless network system selection mechanism within a mobile station
FI112583B (en) * 1999-05-26 2003-12-15 Nokia Corp A method for implementing handover measurements between cellular radio systems and a terminal
JP3293599B2 (en) * 1999-07-28 2002-06-17 日本電気株式会社 CDMA mobile communication system and inter-system handoff control method
AU2007240231B2 (en) * 1999-08-11 2010-10-07 Qualcomm Incorporated Method and system for performing a handoff in a wireless communication system, such as a hard handoff
US6272353B1 (en) * 1999-08-20 2001-08-07 Siemens Information And Communication Mobile Llc. Method and system for mobile communications
US6542743B1 (en) * 1999-08-31 2003-04-01 Qualcomm, Incorporated Method and apparatus for reducing pilot search times utilizing mobile station location information
KR100504464B1 (en) * 1999-09-02 2005-08-03 엘지전자 주식회사 Control method for power of Base Terminal Station
US6845238B1 (en) * 1999-09-15 2005-01-18 Telefonaktiebolaget Lm Ericsson (Publ) Inter-frequency measurement and handover for wireless communications
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
US7023822B1 (en) * 2000-10-12 2006-04-04 Via Telecom Co., Ltd. Method and apparatus for initiating a reverse link intergenerational handoff in a CDMA communication system
KR100313760B1 (en) * 1999-11-10 2001-11-17 박종섭 Dynamic channel allocation method of extension coverage base station in mobile communication system
US6654362B1 (en) 1999-11-24 2003-11-25 Lucent Technologies, Inc. Use of location in handoff in wireless communication systems
JP3535427B2 (en) * 1999-11-25 2004-06-07 松下電器産業株式会社 Wireless communication device
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
KR100469734B1 (en) * 1999-12-07 2005-02-02 삼성전자주식회사 Recovery method of call drop in mobile communication system
US6393276B1 (en) * 2000-01-12 2002-05-21 Telefonaktiebolaget Lm Ericsson Mobile station assisted forward link open loop power and rate control in a CDMA system
FI109071B (en) 2000-01-17 2002-05-15 Nokia Corp A signaling
US6944143B1 (en) * 2000-03-31 2005-09-13 Qualcomm Incorporated Prioritization of searching by a remote unit in a wireless communication system
US7224719B1 (en) * 2000-03-31 2007-05-29 Qualcomm, Incorporated Fast acquisition of a pilot signal in a wireless communication device
US6917808B1 (en) * 2000-04-28 2005-07-12 Lucent Technologies Inc. Inter-frequency handoff evaluation method
GB2362785B (en) 2000-05-27 2004-05-05 Motorola Inc Communication system and method of administering connections therein
US20020024940A1 (en) * 2000-06-08 2002-02-28 Smith Scott R. Method and apparatus for a communication system having multiple service functionality
US7843878B2 (en) * 2000-12-04 2010-11-30 Ericsson Ab Method and apparatus to control handoff between different wireless systems
US7945266B2 (en) 2000-12-05 2011-05-17 Qualcomm Incorporated Method and apparatus for call recovery in a wireless communication system
US7567781B2 (en) * 2001-01-05 2009-07-28 Qualcomm, Incorporated Method and apparatus for power level adjustment in a wireless communication system
US6845245B2 (en) * 2000-12-22 2005-01-18 Denso Corporation Access parameter adaptation and packet data resource management using detailed mobile status information
KR100384899B1 (en) * 2001-01-10 2003-05-23 한국전자통신연구원 Method for seamless inter frequency hard handover in wireless telecommunication system
US7043242B2 (en) * 2001-01-31 2006-05-09 Nokia Corporation Measurement method and device for activating interfrequency handover in a wireless telecommunication network
WO2002082108A1 (en) * 2001-04-03 2002-10-17 Nokia Corporation Reverse link handoff mechanism with hybrid-arq and cell site selection in cdma2000 1xev-dv systems
US7437159B1 (en) * 2001-06-21 2008-10-14 Sprint Spectrum L.P. Method and system for overcoming pilot pollution in a wireless communications network
US7787389B2 (en) 2001-08-20 2010-08-31 Qualcomm Incorporated Method and system for utilization of an outer decoder in a broadcast services communication system
JP3423298B2 (en) * 2001-09-28 2003-07-07 三洋電機株式会社 Mobile phone, base station search method and program
US7962135B2 (en) 2002-01-10 2011-06-14 Qualcomm Incorporated Method and apparatus for efficient selection and acquisition of a wireless communications system
US7853260B2 (en) * 2002-04-29 2010-12-14 Nokia Corporation Method and apparatus for cell identification for uplink interference avoidance using inter-frequency measurements
US7177658B2 (en) 2002-05-06 2007-02-13 Qualcomm, Incorporated Multi-media broadcast and multicast service (MBMS) in a wireless communications system
US7047036B2 (en) * 2002-07-02 2006-05-16 Interdigital Technology Corporation Method and apparatus for handoff between a wireless local area network (WLAN) and a universal mobile telecommunication system (UMTS)
US7020109B2 (en) * 2002-08-21 2006-03-28 Qualcomm Incorporated Method and system for communicating content on a broadcast services communication system
RU2482608C2 (en) 2002-08-21 2013-05-20 Квэлкомм Инкорпорейтед Method and system for transmitting information content in broadcast service transmission system
US7016327B2 (en) 2002-08-21 2006-03-21 Qualcomm Incorporated Method and system for communicating content on a broadcast services communication system
WO2004025975A2 (en) * 2002-09-11 2004-03-25 George Mason Intellectual Properties, Inc. Cellular network handoff decision mechanism
US7299041B2 (en) * 2002-09-30 2007-11-20 Sony Ericsson Mobile Communications Ab Method and device of selecting a communication system
US20040203435A1 (en) * 2002-10-29 2004-10-14 Karlquist Richard K. Mapping and discovering peer-to-peer wireless networks
KR20040061790A (en) * 2002-12-31 2004-07-07 에스케이 텔레콤주식회사 Method and System for Recovering from Hand-off fail for Use in CDMA 2000 1x EV-DO System
US7768974B2 (en) * 2003-02-03 2010-08-03 Alcatel-Lucent Method and arrangement for generating pilot beacons in wireless communication systems
US7177644B2 (en) * 2003-02-12 2007-02-13 Nortel Networks Limited Distributed multi-beam wireless system
KR100665425B1 (en) * 2003-03-08 2007-01-04 삼성전자주식회사 System and method for performing handover operation in a mobile communication system
US7299047B2 (en) * 2003-08-19 2007-11-20 Lucent Technologies Inc. Wireless communication system enhanced call recovery
US7318187B2 (en) * 2003-08-21 2008-01-08 Qualcomm Incorporated Outer coding methods for broadcast/multicast content and related apparatus
US8804761B2 (en) 2003-08-21 2014-08-12 Qualcomm Incorporated Methods for seamless delivery of broadcast and multicast content across cell borders and/or between different transmission schemes and related apparatus
US8694869B2 (en) 2003-08-21 2014-04-08 QUALCIMM Incorporated Methods for forward error correction coding above a radio link control layer and related apparatus
US6980535B2 (en) * 2003-08-28 2005-12-27 Motorola, Inc. Passive probing for handover in a local area network
FI20031409A0 (en) * 2003-09-30 2003-09-30 Nokia Corp Sharing of processing in a radio network
US7215956B2 (en) * 2003-11-04 2007-05-08 Qualcomm, Incorporated Method and apparatus for scanning frequency channels for handoff candidates while minimizing battery consumption
EP2228931A3 (en) 2003-11-12 2010-11-17 Interdigital Technology Corporation System for application server autonomous access across different types of access technology networks
TWI471028B (en) 2003-11-13 2015-01-21 Interdigital Tech Corp Method and wireless transmit/receive unit for facilitating handover
KR100888994B1 (en) 2004-03-12 2009-03-17 인터디지탈 테크날러지 코포레이션 Method and system for switching a radio access technology between wireless communication systems with a multi-mode wireless transmit/receive unit
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
JP2006333239A (en) * 2005-05-27 2006-12-07 Nec Electronics Corp Interface apparatus and communication control method
US7970369B2 (en) * 2005-06-07 2011-06-28 Nokia Corporation Receiving devices
US9467950B2 (en) * 2006-02-14 2016-10-11 Alcatel Lucent Method for adjusting forward link power control parameters based on forward link quality feedback in wireless network
MY187397A (en) 2006-04-28 2021-09-22 Qualcomm Inc Method and apparatus for enhanced paging
JP4981899B2 (en) * 2006-05-22 2012-07-25 テレフオンアクチーボラゲット エル エム エリクソン（パブル） Method and apparatus for obtaining and maintaining control of traffic from a radio base station in a cellular telephone communication system
US7848292B2 (en) * 2006-06-29 2010-12-07 Alcatel-Lucent Usa Inc. Method of dynamically populating a neighbor list in a wireless communication system
US20090023448A1 (en) * 2007-02-21 2009-01-22 Qualcomm Incorporated Method and apparatus for inter-system handover
US8797997B2 (en) 2007-08-07 2014-08-05 Blackberry Limited Method and system for determining access during inter-technologies handoff
US8249596B2 (en) * 2008-02-12 2012-08-21 Cisco Technology, Inc. Location based handoff
US8325648B1 (en) 2009-04-29 2012-12-04 Sprint Spectrum L.P. Methods and systems for assigning a wireless communication device to a carrier frequency
US8818356B2 (en) * 2009-05-01 2014-08-26 Blackberry Limited Methods and apparatus for handling measurement reports
US8320313B1 (en) 2009-06-19 2012-11-27 Sprint Spectrum L.P. Method and system for carrier frequency management based on slot contention
JP4970559B2 (en) * 2010-01-21 2012-07-11 株式会社エヌ・ティ・ティ・ドコモ Mobile communication system, network device, and mobile communication method
US9088937B2 (en) * 2010-03-18 2015-07-21 Sprint Spectrum L.P. Methods and systems for causing a mobile station to originate a subsequent call via a coverage area other than that used for a first call
US8798013B1 (en) 2011-03-25 2014-08-05 Sprint Spectrum L.P. Method and system for management of data transmission in timeslots
RU2576245C1 (en) * 2011-12-13 2016-02-27 Нек Корпорейшн Radio parameter control system, radio parameter control device, radio base station, method and radio parameter control programme
JP6208491B2 (en) * 2013-08-07 2017-10-04 京セラ株式会社 User terminal, method, and processor
JP6276886B2 (en) * 2017-09-07 2018-02-07 京セラ株式会社 User terminal, method, and processor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996012380A1 (en) * 1994-10-16 1996-04-25 Qualcomm Incorporated Method and apparatus for handoff between different cellular communications systems
EP0719064A2 (en) * 1994-12-23 1996-06-26 Nokia Mobile Phones Ltd. Multi-mode radiotelephone apparatus
US5594718A (en) * 1995-03-30 1997-01-14 Qualcomm Incorporated Method and apparatus for providing mobile unit assisted hard handoff from a CDMA communication system to an alternative access communication system

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4401307A (en) 1981-09-10 1983-08-30 Jacques Dechavanne Seal, scraper, and guide for piston rod of single-action cylinder
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US5042082A (en) * 1989-06-26 1991-08-20 Telefonaktiebolaget L. M. Ericsson Mobile assisted handoff
NL8902453A (en) * 1989-10-03 1991-05-01 Nederland Ptt METHOD FOR TRANSFERRING THE TREATMENT OF AN ACTIVE LINK WITH A MOBILE TERMINAL BETWEEN TWO MOBILE SERVICE CENTERS ESTABLISHED FOR MOBILE SERVICES
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
US5109390A (en) 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver 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
SE9003913D0 (en) * 1990-12-07 1990-12-07 Ericsson Telefon Ab L M A METHOD OF LOCATING A MOBILE STATION IN A CELLULAR MOBILE RADIO SYSTEM
CA2032325C (en) * 1990-12-14 1998-07-07 Leo Strawczynski Intra-cell call hand-over in radio communication systems with dynamic channel allocation
US5267261A (en) * 1992-03-05 1993-11-30 Qualcomm Incorporated Mobile station assisted soft handoff in a CDMA cellular communications system
US5295153A (en) * 1992-04-13 1994-03-15 Telefonaktiebolaget L M Ericsson CDMA frequency allocation
US5490165A (en) 1993-10-28 1996-02-06 Qualcomm Incorporated Demodulation element assignment in a system capable of receiving multiple signals
US5722072A (en) * 1994-03-21 1998-02-24 Motorola, Inc. Handover based on measured time of signals received from neighboring cells
ATE277458T1 (en) * 1994-07-29 2004-10-15 Qualcomm Inc METHOD AND APPARATUS FOR PERFORMING CODE DETECTION IN A CDMA TRANSMISSION SYSTEM
US5590177A (en) * 1994-09-30 1996-12-31 Motorola, Inc. Method for preventing a dropped call during a handoff in a radiotelephone system
KR970008949B1 (en) * 1994-11-16 1997-06-03 Korea Electronics Telecomm Method and system for providing a frequency handoff in communication in a cdma cellular telephone system
US5682380A (en) * 1994-11-30 1997-10-28 Electronics And Telecommunications Research Institute Hard-handoff control method for a CDMA (Code Division Multiple Access) mobile switching center
US5634192A (en) * 1995-02-23 1997-05-27 Northern Telecom Limited Mobile-assisted handoff technique
US5666356A (en) * 1995-10-04 1997-09-09 Motorola, Inc. Method and apparatus for controlling calls in a code division multiple access system
US5848063A (en) * 1996-05-23 1998-12-08 Qualcomm Incorporated Method and apparatus for hard handoff in a CDMA system
US5737704A (en) * 1996-07-22 1998-04-07 Electronics And Telecommunications Research Institute Channel allocation method for removing inter-cell hard handoffs in a CDMA system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996012380A1 (en) * 1994-10-16 1996-04-25 Qualcomm Incorporated Method and apparatus for handoff between different cellular communications systems
EP0719064A2 (en) * 1994-12-23 1996-06-26 Nokia Mobile Phones Ltd. Multi-mode radiotelephone apparatus
US5594718A (en) * 1995-03-30 1997-01-14 Qualcomm Incorporated Method and apparatus for providing mobile unit assisted hard handoff from a CDMA communication system to an alternative access communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8964692B2 (en) 2008-11-10 2015-02-24 Qualcomm Incorporated Spectrum sensing of bluetooth using a sequence of energy detection measurements

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