US9271202B2 - Handover control method, apparatuses and communication system - Google Patents

Handover control method, apparatuses and communication system Download PDF

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Publication number
US9271202B2
US9271202B2 US13/340,148 US201113340148A US9271202B2 US 9271202 B2 US9271202 B2 US 9271202B2 US 201113340148 A US201113340148 A US 201113340148A US 9271202 B2 US9271202 B2 US 9271202B2
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United States
Prior art keywords
base station
identity
relay node
target cell
control
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Expired - Fee Related, expires
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US13/340,148
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English (en)
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US20120100855A1 (en
Inventor
Tao Zhang
Bo Lin
Yan Wang
Li Chai
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Nokia Technologies Oy
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Huawei Technologies Co Ltd
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Assigned to HUAWEI TECHNOLOGIES, CO., LTD reassignment HUAWEI TECHNOLOGIES, CO., LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHAI, LI, LIN, BO, WANG, YAN, ZHANG, TAO
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0061Transmission or use of information for re-establishing the radio link of neighbour cell information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603Arrangements for wireless physical layer control
    • H04B7/2606Arrangements for base station coverage control, e.g. by using relays in tunnels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/54Store-and-forward switching systems 
    • H04L12/56Packet switching systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/26Route discovery packet
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/24Connectivity information management, e.g. connectivity discovery or connectivity update
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/10Reselecting an access point controller
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/34Reselection control
    • H04W36/38Reselection control by fixed network equipment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/34Modification of an existing route
    • H04W40/36Modification of an existing route due to handover
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/047Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/04Interfaces between hierarchically different network devices
    • H04W92/12Interfaces between hierarchically different network devices between access points and access point controllers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/16Interfaces between hierarchically similar devices
    • H04W92/20Interfaces between hierarchically similar devices between access points
US13/340,148 2009-06-29 2011-12-29 Handover control method, apparatuses and communication system Expired - Fee Related US9271202B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN2009101422917A CN101938734B (zh) 2009-06-29 2009-06-29 切换控制方法、装置和通信系统
CN200910142291.7 2009-06-29
CN200910142291 2009-06-29
PCT/CN2010/073674 WO2011000252A1 (zh) 2009-06-29 2010-06-08 切换控制方法、装置和通信系统

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/073674 Continuation WO2011000252A1 (zh) 2009-06-29 2010-06-08 切换控制方法、装置和通信系统

Publications (2)

Publication Number Publication Date
US20120100855A1 US20120100855A1 (en) 2012-04-26
US9271202B2 true US9271202B2 (en) 2016-02-23

Family

ID=43391818

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/340,148 Expired - Fee Related US9271202B2 (en) 2009-06-29 2011-12-29 Handover control method, apparatuses and communication system

Country Status (6)

Country Link
US (1) US9271202B2 (de)
EP (1) EP2442612A4 (de)
CN (1) CN101938734B (de)
BR (1) BRPI1015132A2 (de)
RU (1) RU2502227C2 (de)
WO (1) WO2011000252A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10531315B2 (en) 2018-05-17 2020-01-07 AT&T Technical Services Company, Inc. Mitigating handover issues for ground-aerial hybrid networks

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104244343B (zh) * 2009-12-31 2019-02-19 华为技术有限公司 中继网络中的切换方法和系统、中继站、控制基站及基站
CN102104996B (zh) * 2010-08-12 2016-02-24 电信科学技术研究院 接口连通性信息的发送与接收方法、设备和系统
CN102469439A (zh) * 2010-11-05 2012-05-23 中兴通讯股份有限公司 一种x2接口信息的指示和获取方法及系统
CN102098723B (zh) * 2011-02-12 2014-01-29 大唐移动通信设备有限公司 为移动中继节点配置施主基站或施主小区的方法和设备
CN102111806B (zh) * 2011-02-14 2013-09-04 电信科学技术研究院 目标小区选取方法、系统和设备
CN102118808B (zh) * 2011-03-03 2014-11-12 电信科学技术研究院 触发切换及移动管理实体池标识信息的传递方法和设备
CN103096257B (zh) * 2011-10-27 2015-04-01 普天信息技术研究院有限公司 一种用户设备群组的切换方法
CN103313226B (zh) * 2012-03-16 2016-04-20 电信科学技术研究院 一种进行节点选择功能的方法、系统和设备
CN103327475B (zh) * 2012-03-21 2017-05-24 电信科学技术研究院 一种小区切换的寻址方法以及寻址装置
CN102695225B (zh) * 2012-05-11 2014-12-24 中国联合网络通信集团有限公司 基站直通架构下的用户切换方法及基站
WO2014003429A1 (en) * 2012-06-28 2014-01-03 Lg Electronics Inc. Method and apparatus for transmitting indication in wireless communication system
US9480106B2 (en) * 2012-11-28 2016-10-25 T-Mobile Usa, Inc. Inter-base station logical interface communication using relay devices
GB2509749A (en) * 2013-01-11 2014-07-16 Nec Corp Communication system with configuration of measuring reporting via mobile relays
WO2014158069A1 (en) * 2013-03-25 2014-10-02 Telefonaktiebolaget L M Ericsson (Publ) Method and network node for enabling an extended a base station identity
JP6281192B2 (ja) * 2013-05-24 2018-02-21 富士通株式会社 基地局装置、ハンドオーバー制御方法および無線通信システム
US9491575B2 (en) * 2014-06-13 2016-11-08 Qualcomm Incorporated Positioning beacons with wireless backhaul
SG11201510546TA (en) * 2015-02-13 2016-09-29 Ericsson Telefon Ab L M Establishment of dual connectivity
US10021606B1 (en) * 2016-05-24 2018-07-10 Sprint Spectrum L.P. Disabling relay base station handover based on serving base station capabilities
WO2021028617A1 (en) * 2019-08-14 2021-02-18 Nokia Solutions And Networks Oy Preparation of multiple target cells for a handover in a wireless communication network

Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030008669A1 (en) * 2001-04-24 2003-01-09 Stein Jeremy M. Method and apparatus for estimating the position of a terminal based on identification codes for transmission sources
WO2007006217A1 (fr) 2005-07-08 2007-01-18 Huawei Technologies Co., Ltd. Procédé de transfert intersystèmes
US20070086387A1 (en) * 2005-10-17 2007-04-19 Samsung Electronics Co., Ltd. Apparatus and method for handover in wireless access communication system
US20070086388A1 (en) * 2005-10-17 2007-04-19 Samsung Electronics Co., Ltd. Apparatus and method for supporting handover in a wireless access communication system
US20070249347A1 (en) * 2006-04-19 2007-10-25 Yousuf Saifullah Handover or location update for optimization for relay stations in a wireless network
CN101064911A (zh) 2006-04-28 2007-10-31 上海贝尔阿尔卡特股份有限公司 无线接入系统的切换控制方法、中继站和基站
WO2008004066A2 (en) 2006-07-03 2008-01-10 Nokia Corporation Topology and route discovery and management for relay networks
WO2008021195A1 (en) 2006-08-09 2008-02-21 Siemens Corporate Research, Inc. Route maintenance and update based on connection identifier in multi-hop relay systems
JP2008104096A (ja) 2006-10-20 2008-05-01 Kddi Corp 無線中継システムおよびそのメッセージ交換方法
WO2008054682A1 (en) 2006-10-30 2008-05-08 Intel Corporation Framework to design new mac message exchange procedure related to mobile station (ms) handover in multi-hop relay broadband wireless access network
CN101267240A (zh) 2007-03-15 2008-09-17 华为技术有限公司 多跳无线中继通信系统及其下行数据传输方法、装置
CN101287178A (zh) 2007-04-13 2008-10-15 中兴通讯股份有限公司 包含基站和无线中继站的无线传输网络的自适应管理方法
CN101291527A (zh) 2007-04-20 2008-10-22 华为技术有限公司 无线中继站入网方法、设备和系统
WO2009043866A2 (en) 2007-10-02 2009-04-09 Nokia Siemens Networks Oy Method, apparatus and system for reselection of a relay node
US20090156214A1 (en) * 2007-12-18 2009-06-18 Samsung Electronics Co., Ltd. Preamble design method for reducing overhead during handover in hierarchical cellular system
US20090213779A1 (en) * 2006-09-18 2009-08-27 Aimin Zhang Multi-hop wireless relay communication system and downlink data transmitting method and device
CN101668324A (zh) 2008-09-04 2010-03-10 华为技术有限公司 中继网络的路由方法、装置及系统
CN101772113A (zh) 2008-12-31 2010-07-07 华为技术有限公司 切换方法及基站节点
US20100279601A1 (en) * 2007-12-14 2010-11-04 Vinh Van Phan Identification of Relay Base Stations in Wireless Networks
US20140016542A1 (en) * 2009-04-13 2014-01-16 Qualcomm Incorporated Device mobility for split-cell relay networks

Patent Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2308810C2 (ru) 2001-04-24 2007-10-20 Квэлкомм Инкорпорейтед Способ и устройство для оценки местоположения терминала на основании идентифицирующих кодов для источников передач
US20030008669A1 (en) * 2001-04-24 2003-01-09 Stein Jeremy M. Method and apparatus for estimating the position of a terminal based on identification codes for transmission sources
WO2007006217A1 (fr) 2005-07-08 2007-01-18 Huawei Technologies Co., Ltd. Procédé de transfert intersystèmes
US20070086387A1 (en) * 2005-10-17 2007-04-19 Samsung Electronics Co., Ltd. Apparatus and method for handover in wireless access communication system
US20070086388A1 (en) * 2005-10-17 2007-04-19 Samsung Electronics Co., Ltd. Apparatus and method for supporting handover in a wireless access communication system
CN101009926A (zh) 2005-10-17 2007-08-01 三星电子株式会社 用于支持无线接入通信系统中的切换的设备和方法
US20070249347A1 (en) * 2006-04-19 2007-10-25 Yousuf Saifullah Handover or location update for optimization for relay stations in a wireless network
US20090088164A1 (en) * 2006-04-28 2009-04-02 Alcatel Lucent Handover control method in a wireless access system, relay station and base station
CN101064911A (zh) 2006-04-28 2007-10-31 上海贝尔阿尔卡特股份有限公司 无线接入系统的切换控制方法、中继站和基站
WO2008004066A2 (en) 2006-07-03 2008-01-10 Nokia Corporation Topology and route discovery and management for relay networks
WO2008021195A1 (en) 2006-08-09 2008-02-21 Siemens Corporate Research, Inc. Route maintenance and update based on connection identifier in multi-hop relay systems
US20090213779A1 (en) * 2006-09-18 2009-08-27 Aimin Zhang Multi-hop wireless relay communication system and downlink data transmitting method and device
JP2008104096A (ja) 2006-10-20 2008-05-01 Kddi Corp 無線中継システムおよびそのメッセージ交換方法
WO2008054682A1 (en) 2006-10-30 2008-05-08 Intel Corporation Framework to design new mac message exchange procedure related to mobile station (ms) handover in multi-hop relay broadband wireless access network
CN101267240A (zh) 2007-03-15 2008-09-17 华为技术有限公司 多跳无线中继通信系统及其下行数据传输方法、装置
CN101287178A (zh) 2007-04-13 2008-10-15 中兴通讯股份有限公司 包含基站和无线中继站的无线传输网络的自适应管理方法
US20100046396A1 (en) * 2007-04-13 2010-02-25 Zte Corporation Adaptive management method for wireless transfer network containing base station and wireless relay stations
CN101291527A (zh) 2007-04-20 2008-10-22 华为技术有限公司 无线中继站入网方法、设备和系统
WO2009043866A2 (en) 2007-10-02 2009-04-09 Nokia Siemens Networks Oy Method, apparatus and system for reselection of a relay node
US20100279601A1 (en) * 2007-12-14 2010-11-04 Vinh Van Phan Identification of Relay Base Stations in Wireless Networks
US20090156214A1 (en) * 2007-12-18 2009-06-18 Samsung Electronics Co., Ltd. Preamble design method for reducing overhead during handover in hierarchical cellular system
CN101668324A (zh) 2008-09-04 2010-03-10 华为技术有限公司 中继网络的路由方法、装置及系统
CN101772113A (zh) 2008-12-31 2010-07-07 华为技术有限公司 切换方法及基站节点
US20140016542A1 (en) * 2009-04-13 2014-01-16 Qualcomm Incorporated Device mobility for split-cell relay networks

Non-Patent Citations (12)

* Cited by examiner, † Cited by third party
Title
Extended European Search Report received in Application No. 10793547.0-1525, Applicant: Huawei Technologies Co., Ltd., mailed Oct. 10, 2012, 9 pages.
First Chinese Office Action with Partial Translation regarding Chinese Application No. 200910142291.7, dated Jun. 14, 2012, 8 pages.
International Search Report regarding International Application No. PCT/CN2010/073674, dated Sep. 16, 2010, 5 pages.
LTE, "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN);" Overall Description; Stage 2 (Release 9), 3GPP TS 36.300 v9.0.0, Jun. 2009, 157 pages.
Mitsubishi Electric, "Mobility Management for Relays," 3GPP TSG-RAN WG3 #64, R3-091358, San Fransisco, California, May 4-8, 2008, 4 pages.
Russian Office Action received in Application No. 2012103013/07, Applicant: Huawei Technologies Co., Ltd., mailed Apr. 9, 2013, 15 pages.
Russian Office Action received on U.S. Pat. No. 2012103013, mailed Jun. 17, 2013, 29 pages.
Second Chinese Office Action of Chinese Application No. 200910142291.7 mailed Feb. 5, 2013, 7 pages.
Sharp, "Information exchange over a wireless X2 interface between relay nodes," 3GPP TSG RAN WG2 Meeting #66, R2-092827, San Francisco, California, May 4-8, 2009, 4 pages.
Texas Instruments, "On the design of relay node for LTE-advanced," 3GPP TSG RAN WG1 #56, R1090593, Athens, Greece, Feb. 9-13, 2009, 11 pages.
Third Office Action of Chinese Application No. 200910142291.7 mailed May 20, 2013, 6 pages (Partial Translation).
Written Opinion of the International Searching Authority regarding International Application No. PCT/CN2010/073674, dated Sep. 16, 2010, 7 pages.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10531315B2 (en) 2018-05-17 2020-01-07 AT&T Technical Services Company, Inc. Mitigating handover issues for ground-aerial hybrid networks

Also Published As

Publication number Publication date
WO2011000252A1 (zh) 2011-01-06
EP2442612A4 (de) 2012-11-07
CN101938734B (zh) 2013-11-06
RU2502227C2 (ru) 2013-12-20
EP2442612A1 (de) 2012-04-18
US20120100855A1 (en) 2012-04-26
CN101938734A (zh) 2011-01-05
BRPI1015132A2 (pt) 2016-04-19
RU2012103013A (ru) 2013-08-10

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