WO2011020481A1 - Procédé d'assistance à des décisions de transfert intercellulaire d'un terminal mobile dans un réseau de communication cellulaire mobile - Google Patents

Procédé d'assistance à des décisions de transfert intercellulaire d'un terminal mobile dans un réseau de communication cellulaire mobile Download PDF

Info

Publication number
WO2011020481A1
WO2011020481A1 PCT/EP2009/006012 EP2009006012W WO2011020481A1 WO 2011020481 A1 WO2011020481 A1 WO 2011020481A1 EP 2009006012 W EP2009006012 W EP 2009006012W WO 2011020481 A1 WO2011020481 A1 WO 2011020481A1
Authority
WO
WIPO (PCT)
Prior art keywords
mobile
femtocell
mobile terminal
network
femtocells
Prior art date
Application number
PCT/EP2009/006012
Other languages
English (en)
Inventor
Marcus Schoeller
Frank Zdarsky
Stefan Schmid
Original Assignee
Nec Europe Ltd.
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 Nec Europe Ltd. filed Critical Nec Europe Ltd.
Priority to JP2012525045A priority Critical patent/JP2013502783A/ja
Priority to PCT/EP2009/006012 priority patent/WO2011020481A1/fr
Publication of WO2011020481A1 publication Critical patent/WO2011020481A1/fr

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
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/326—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by proximity to another entity

Definitions

  • the present invention relates to a method for supporting handover decisions of a mobile terminal in a cellular mobile communication network, said network comprising mobile femtocells.
  • a mobile terminal - in 3GPP commonly denoted as user equipment (UE) - is typically located within the coverage range of multiple macro cell base stations (BSs) at the same time.
  • the decision, which BS shall serve the UE depends on various factors, the most important factor being the quality of the radio channels between the UE and the BSs in question.
  • the BS generally provides a list of other BSs in the vicinity to the UE to minimize the frequencies to be scanned by the UE for better signals.
  • handovers are mostly due to UE movement relative to static BSs. Handovers are typically initiated as late as possible, to reduce signaling overhead and oscillations (so called "ping pong effect"), yet early enough to minimize call dropping.
  • mobile femtocells mobile BSs with extremely small coverage ranges
  • MFCs mobile femtocells
  • MFCs mobile femtocells
  • the small and constant distance between a mobile femtocell and a passenger's terminal allows constantly high channel qualities at a lower transmit power during the whole duration of the trip. For the passenger, lower transmit power additionally means a longer battery-lifetime of his mobile terminal.
  • Mobile femtocells are also an enabler for new kinds of mobility-related and location-based services.
  • MFCs significantly increases the complexity of deciding when to perform a handover and which new BS or MFC to hand over to. Due to the mobile femtocells' small coverage area and their mobility it is very difficult to make any predictions whether the radio channel quality experienced by a UE entering the coverage area of an MFC will be sufficiently high over a sufficiently long time period so that a handover makes sense from the network operator's and/or the UE's viewpoint.
  • the aforementioned object is accomplished by a method comprising the features of claim 1.
  • a method comprising the features of claim 1.
  • such a method is characterized in the steps of detecting the presence of a mobile femtocell close to said mobile terminal, evaluating a possible joint movement of said mobile terminal with said mobile femtocell, and handing over of said mobile terminal to said mobile femtocell in case said evaluation yields that a joint movement with said mobile femtocell is given.
  • the present invention proposes first that the mobile terminal detects the presence of a mobile femtocell close to the mobile terminal. Detecting the presence of a mobile femtocell close to a mobile terminal means that mechanisms are provided that make the mobile terminal getting aware that it is located within the coverage area of a mobile femtocell.
  • the method according to the present invention proposes to evaluate a possible joint movement of a mobile terminal with a mobile femtocell. Dependent on the outcome of this joint movement evaluation process it is decided whether a handover of the mobile terminal to the mobile femtocell is performed or not. Having identified a jointly moving mobile femtocell enables improved pro-active accelerated hand-over decision algorithms relative to those for static BSs, resulting in an improved frequency reuse within the macro cell and a reduced signal overhead.
  • the proposed solution allows a UE to find/choose the best available cell while on the move, and it prevents (or at least minimizes) erroneous handovers to mobile femtocells which do not move jointly with the UE. Further, the method according to the present invention is energy-efficient due to low power communication of mobile terminals with femtocells.
  • mobile terminal When referred to "mobile terminal” hereafter, this terminology includes but is not limited to a user equipment (UE), a mobile phone, a handset, a PDA (personal digital assistant), a computer, or any other user device capable of operating in a cellular mobile telecommunication network.
  • UE user equipment
  • PDA personal digital assistant
  • mobile femtocells indicate the fact that they are mobile as part of the system information they regularly broadcast.
  • the information whether a femtocell is mobile or not may be included in System Information Block Type 1 (e.g. according to 3GPP TS 25.331 and TS 36.331 ) of the system information, which are broadcasted by a femtocell.
  • System Information Block Type 1 e.g. according to 3GPP TS 25.331 and TS 36.331
  • the System Information Block Type 4 e.g.
  • the SystemlnformationBlockType4 contains neighboring cell related information relevant only for intra-frequency cell re-selection.
  • the IE includes cells - A - with specific re-selection parameters as well as blacklisted cells. Again, either a Boolean indicating a mobile femtocell's mobility or an undefined GPS coordinate (- 1 ,-1 ) or both can be used. Similar extensions to other architectures, i.e., WiMAX, can be applied.
  • other femtocells and/or macro cells of the network may broadcast in their neighbor cell list the fact that a specific mobile femtocell is mobile.
  • the neighbor cell list announcement may be extended to host mobile femtocells and a special marker may be introduced to mark mobile femtocell entries in this neighbor cell list. Further it may be provided that mobile terminals actively perform radio-based measurements for such announcements of mobile femtocells.
  • presence beacons are used to announce mobile femtocells.
  • the mobile femtocells itself or another radio-, light- or sound-based technology sends out a periodic signal with a sufficiently low power so that it is only receivable by mobile terminals located within close vicinity, e.g. within the interior of a public transport like a bus or a tram.
  • the radio-, light- or sound-based technology may include for example, but not limited to, RFID tags (Radio Frequency IDentification), Bluetooth, ZigBee, NFC (Near Field Communication), light-modulation transmitters, ultrasonic transducers, etc.
  • the signals emitted by these devices may encode an identifier for the mobile femtocell the presence of which they announce.
  • the fact that the mobile terminal notices the mobile femtocell serves as an implicit trigger for the mobile terminal to start the mobile femtocell detection process.
  • a mobile terminal while being in idle mode, detects that it is moving based on system information received from different macro cells and femtocells of the network. For instance, frequent changes of macro cells and/or location areas can be used as indication for movements of the mobile terminal and as an explicit trigger for the mobile terminal to actively start detecting the presence of a mobile femtocell, e.g. by starting to perform active scans for the presence of mobile femtocells.
  • the network that detects that a mobile terminal is moving.
  • Such movement detection may be based on frequent location area updates, may be performed by the network's MSC (Mobile Switching Center) or the SGSN/MME (Serving GPRS Support Node/Mobility Management Entity) that handles mobility management for the mobile terminal.
  • the network may trigger the mobile terminal to actively perform radio-based measurements in order to identify the most appropriate mobile femtocell for the mobile terminal.
  • the trigger may be realized by way of paging the mobile terminal, e.g. with a specific page cause.
  • the trigger from the network to the mobile terminal to actively perform radio-based measurements is performed depended on the network's explicit knowledge of the potential presence of mobile femtocells.
  • the network could easily detect that a mobile terminal is located on a certain railroad on which mobile femtocells are available, and as a result trigger the mobile terminal to perform the active scan.
  • the network could also indicate the specific mobile femtocell information as part of the neighbor cell list.
  • context information is to be understood in a broad sense according to a definition given by Dey et al. ('Towards a better understanding of context and context-awareness", proceedings of the Workshop on the What, Who, Where, When and How of context-awareness, affiliated with a CHI 2000 conference on human factures in computer systems, New York, NY 2000). Accordingly, context may include "any information that can be used characterized of the situation of entities (i.e.
  • Context is particularly the location, identity and state of people, groups and computations in physical objects."
  • the announcement of specific context information that a mobile femtocell is onboard a bus of line 4 can be correlated with the context information of a mobile terminal that the user is about to board or get off that bus.
  • context information may be inferred from the user's calendar, from a movement history or from the public transport's time schedule.
  • Alternate context information may include, but is not limited to, geographical position together with direction and speed of movement, e.g. inferred form GPS information, vehicular sensors, etc.
  • the context information of a mobile terminal may be communicated either to a present mobile femtocell or to the mobile terminal's operator network or to both of them.
  • the correlation of information to detect joint movement between a mobile terminal and a mobile femtocell can then be done either on the mobile femtocell or in the operator network, respectively, depending on the specific circumstances.
  • the evaluation of a possible joint movement of a mobile terminal with a mobile femtocell includes the step of analyzing over a predefined measurement time period the signal strength the mobile terminal receives from the mobile femtocell. Further it may be provided that a mobile terminal assumes to move jointly with a mobile femtocell in case the signal strength is stable within a predefined range and above a predefined threshold over the predefined measurement time period.
  • the measurement time period as well as the signal strength threshold may be automatically adjusted based on past performance and/or context information (e.g. based on the mobile femtocell's name/ID, location, history, etc.).
  • joint movement is detected by a mobile femtocell performing measurements of the signal strength of non-attached mobile terminals located in its vicinity.
  • Such joint movement detection at the femtocell can be done if an appropriate medium access technology - like e.g. OFDMA (Orthogonal Frequency Division Multiple Access) - or secondary radio for measurements exists that allow signal strength measurements of mobile terminals that are located in the mobile femtoceN's coverage area, but are not attached to it.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • a joint movement can be assumed to have been detected if the signal strength received from a non- attached mobile terminal changes (semi-)synchronously with the signal output power of the mobile femotcell over time and the femtocell is moving. Again, the measurements time period and the signal strength threshold may be automatically adjusted.
  • joint movement detection may be carried out by a macrocell. If an appropriate medium access technology, e.g. OFDMA, or a secondary radio measurement exist, which allow signal strength measurement of mobile terminals and femtocells, a macrocell can correlate changes of signal strength of jointly moving mobile terminals and femtocells. In any case, having detected a mobile femtocell and joint movement of a mobile terminal with it, an expedited handover of the mobile terminal to the mobile femtocell can be executed.
  • OFDMA orthogonal frequency division multiple access technology
  • Fig.1 schematically illustrates an example scenario in which the method according to the present invention can be applied.
  • Fig.2 is a diagram showing the results of different signal strength measurements upon which handover decisions can be based.
  • the scenario depicted in Fig. 1 shows a person P waiting at a bus stop for his line to arrive. Multiple busses and trams pass by which person P does not enter either because the vehicle is not stopping at this bus stop or because it is the wrong line.
  • the person's P mobile terminal UE Upon entering a bus the person's P mobile terminal UE should detect the onboard femtocell.
  • the onboard femtocell detection may be performed by the UE receiving respective presence beacon announcements emitted by the onboard femtocell on a regular basis.
  • a femtocell can indicate whether it is mobile or not as part of the System Information Block Type 1 , which are broadcasted by a femtocell.
  • Either a Boolean indicating the femtoceH's mobility or a undefined GPS coordinate (-1 ,-1 ) or both can be used as follows:
  • the announcements may be based on Systemlnformation BlockType4 that contains neighboring cell related information relevant for intra- frequency cell re-selection.
  • the IE includes cells with specific re-selection parameters as well as blacklisted cells.
  • Either a Boolean indicating a femtocell's mobility or an undefined GPS coordinate (-1 ,-1 ) or both can be used as follows:
  • the relative movement of the UE compared to this mobile femtocell has to be derived.
  • the UE analyzes the signal strength it receives from the mobile femtocell over a predefined measurement time period.
  • the mobile terminal assumes to move jointly with the mobile femtocell and hands over to it.
  • the UE's of all passengers boarding a bus should be handed over to that bus' MFC, which is static relative to the passengers' UEs. Ideally, this should be done as early as possible and not only when the UE leaves its serving BS' coverage range.
  • Fig. 2 shows one example embodiment of the disclosed invention based on measurement results of received signals from various mobile femtocells.
  • a bus passing by is only in communication range for a very short time (rhombic measurement points).
  • a bus stopping in front of a person will be in communication range of the person's UE until it moves on (quadratic measurement points).
  • quadrattic measurement points As the person's selected bus arrives and the person enters this bus the signal strength of the mobile femtocell will stay high over a longer time (triangular measurement points).
  • the signal strength received from a macro cell is constantly high (x-shaped measurement points).
  • These different measurement base lines can be utilized to detect which bus a passenger entered implying with which femtocell the passenger's UE should be attached. If the signal strength of a mobile femtocell stays high over a predefined time period, as is the case for the triangular measurement points, the UE should be switched to this femtocell. This requires that mobile femtocells announce themselves as such type of femtocells. Therefore, a descriptor is added to the cell announcement. Secondly, a time interval has to be defined after which the likelihood of joint movement is high. This interval is scenario dependent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention porte sur un procédé d'assistance à des décisions de transfert intercellulaire d'un terminal mobile dans un réseau de communication de mobile cellulaire, ledit réseau comprenant des femto-cellules mobiles, le procédé étant caractérisé par les étapes de détection de la présence d'une femto-cellule mobile proche dudit terminal mobile, d'évaluation d'un mouvement combiné possible dudit terminal mobile et de ladite femto-cellule mobile, et le transfert intercellulaire dudit terminal mobile sur ladite femtocellule mobile dans le cas où l'évaluation conclut à un mouvement combiné avec ladite femtocellule mobile.
PCT/EP2009/006012 2009-08-19 2009-08-19 Procédé d'assistance à des décisions de transfert intercellulaire d'un terminal mobile dans un réseau de communication cellulaire mobile WO2011020481A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2012525045A JP2013502783A (ja) 2009-08-19 2009-08-19 移動セルラ通信ネットワークにおける移動端末のハンドオーバ決定を支援する方法
PCT/EP2009/006012 WO2011020481A1 (fr) 2009-08-19 2009-08-19 Procédé d'assistance à des décisions de transfert intercellulaire d'un terminal mobile dans un réseau de communication cellulaire mobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/006012 WO2011020481A1 (fr) 2009-08-19 2009-08-19 Procédé d'assistance à des décisions de transfert intercellulaire d'un terminal mobile dans un réseau de communication cellulaire mobile

Publications (1)

Publication Number Publication Date
WO2011020481A1 true WO2011020481A1 (fr) 2011-02-24

Family

ID=42110258

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/006012 WO2011020481A1 (fr) 2009-08-19 2009-08-19 Procédé d'assistance à des décisions de transfert intercellulaire d'un terminal mobile dans un réseau de communication cellulaire mobile

Country Status (2)

Country Link
JP (1) JP2013502783A (fr)
WO (1) WO2011020481A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB984325A (en) * 1962-04-19 1965-02-24 Int Harvester Co Independent power take-off for vehicles
JP2012212953A (ja) * 2011-03-30 2012-11-01 Fujitsu Ltd 情報処理装置、管理方法、及び管理プログラム
WO2013183364A1 (fr) * 2012-06-08 2013-12-12 ソフトバンクモバイル株式会社 Terminal, son procédé de commande et son programme de commande
JP2013258761A (ja) * 2013-08-29 2013-12-26 Softbank Mobile Corp 端末装置及びその接続方法
US8838117B2 (en) 2010-04-23 2014-09-16 Qualcomm Incorporated Active macro-femto hand-in with help from out-of-band proxy
US8954051B2 (en) 2010-04-23 2015-02-10 Qualcomm Incorporated Uniquely identifying target femtocell to facilitate femto-assisted active hand-in
JPWO2013069097A1 (ja) * 2011-11-08 2015-04-02 京セラ株式会社 通信システム、無線通信ノード、及び通信制御方法
US9072032B2 (en) 2010-10-15 2015-06-30 Qualcomm Incorporated Femtocell indication of mobile device proximity and transmission of mobile identity to assist in resolving femtocell disambiguation
GB2526286A (en) * 2014-05-19 2015-11-25 Vodafone Ip Licensing Ltd Handover for base stations with cellular backhaul
JP2016076960A (ja) * 2012-03-23 2016-05-12 京セラ株式会社 通信制御方法
US9432478B2 (en) 2013-11-27 2016-08-30 At&T Intellectual Property I, L.P. Client-side location aware network selection
EP3166358A4 (fr) * 2014-07-01 2017-12-06 LG Electronics Inc. Procédé et dispositif pour réaliser un transfert intercellulaire dans un système de communication sans fil
US9854620B2 (en) 2014-03-26 2017-12-26 Telefonaktiebolaget Lm Ericsson Connection setup between a mobile terminal and a moving base station based on joint movement detection
US10159037B2 (en) 2014-03-26 2018-12-18 Telefonaktiebolaget Lm Ericsson (Publ) Cell selection depending on relative speed between terminal and access point
WO2022131242A1 (fr) * 2020-12-15 2022-06-23 Sharp Kabushiki Kaisha Resélection de cellule sur la base d'informations de mobilité de cellule

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000036858A2 (fr) * 1998-12-11 2000-06-22 Telefonaktiebolaget Lm Ericsson (Publ) Configuration, systeme et procede relatifs aux communications mobiles
EP1077579A1 (fr) * 1999-08-19 2001-02-21 Texas Instruments Incorporated Ameliorations dans des systèmes mobiles cellulaires
EP1113679A2 (fr) * 1999-12-28 2001-07-04 Nec Corporation Appareil de station de base et procédé de communication
US20050026619A1 (en) * 2003-07-31 2005-02-03 Anjali Jha System of and method for using position, velocity, or direction of motion estimates to support handover decisions

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002159055A (ja) * 2000-11-17 2002-05-31 Nec System Integration & Construction Ltd 移動体通信システム
CN100450238C (zh) * 2002-10-18 2009-01-07 株式会社Ntt都科摩 移动站、移动通信系统和网络选择方法
JP2004304351A (ja) * 2003-03-28 2004-10-28 Ntt Docomo Inc 移動通信システムにおける位置登録集中回避方法、並びに携帯端末、移動基地局及び位置情報管理サーバ
JP2006157117A (ja) * 2004-11-25 2006-06-15 Matsushita Electric Ind Co Ltd 移動体通信システム
KR20100070279A (ko) * 2008-12-17 2010-06-25 이용석 무선통신 시스템에서 펨토셀의 운영방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000036858A2 (fr) * 1998-12-11 2000-06-22 Telefonaktiebolaget Lm Ericsson (Publ) Configuration, systeme et procede relatifs aux communications mobiles
EP1077579A1 (fr) * 1999-08-19 2001-02-21 Texas Instruments Incorporated Ameliorations dans des systèmes mobiles cellulaires
EP1113679A2 (fr) * 1999-12-28 2001-07-04 Nec Corporation Appareil de station de base et procédé de communication
US20050026619A1 (en) * 2003-07-31 2005-02-03 Anjali Jha System of and method for using position, velocity, or direction of motion estimates to support handover decisions

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB984325A (en) * 1962-04-19 1965-02-24 Int Harvester Co Independent power take-off for vehicles
US8838117B2 (en) 2010-04-23 2014-09-16 Qualcomm Incorporated Active macro-femto hand-in with help from out-of-band proxy
US8954051B2 (en) 2010-04-23 2015-02-10 Qualcomm Incorporated Uniquely identifying target femtocell to facilitate femto-assisted active hand-in
US9072032B2 (en) 2010-10-15 2015-06-30 Qualcomm Incorporated Femtocell indication of mobile device proximity and transmission of mobile identity to assist in resolving femtocell disambiguation
US9781659B2 (en) 2010-10-15 2017-10-03 Qualcomm Incorporated Proximity detection for femtocells using out-of-band links
JP2012212953A (ja) * 2011-03-30 2012-11-01 Fujitsu Ltd 情報処理装置、管理方法、及び管理プログラム
JPWO2013069097A1 (ja) * 2011-11-08 2015-04-02 京セラ株式会社 通信システム、無線通信ノード、及び通信制御方法
JP2016076960A (ja) * 2012-03-23 2016-05-12 京セラ株式会社 通信制御方法
US9491697B2 (en) 2012-06-08 2016-11-08 Softbank Corp. Terminal, control method for same, and control program for same
WO2013183364A1 (fr) * 2012-06-08 2013-12-12 ソフトバンクモバイル株式会社 Terminal, son procédé de commande et son programme de commande
JP2013258761A (ja) * 2013-08-29 2013-12-26 Softbank Mobile Corp 端末装置及びその接続方法
US9432478B2 (en) 2013-11-27 2016-08-30 At&T Intellectual Property I, L.P. Client-side location aware network selection
US10136380B2 (en) 2013-11-27 2018-11-20 At&T Intellectual Property I, L.P. Client-side location aware network selection
US10524190B2 (en) 2013-11-27 2019-12-31 At&T Intellectual Property I, L.P. Client-side location aware network selection
US10972961B2 (en) 2013-11-27 2021-04-06 At&T Intellectual Property I, L.P. Client-side location aware network selection
US11412440B2 (en) 2013-11-27 2022-08-09 At&T Intellectual Property I, L.P. Client-side location aware network selection
US9854620B2 (en) 2014-03-26 2017-12-26 Telefonaktiebolaget Lm Ericsson Connection setup between a mobile terminal and a moving base station based on joint movement detection
US10159037B2 (en) 2014-03-26 2018-12-18 Telefonaktiebolaget Lm Ericsson (Publ) Cell selection depending on relative speed between terminal and access point
GB2526286A (en) * 2014-05-19 2015-11-25 Vodafone Ip Licensing Ltd Handover for base stations with cellular backhaul
EP3166358A4 (fr) * 2014-07-01 2017-12-06 LG Electronics Inc. Procédé et dispositif pour réaliser un transfert intercellulaire dans un système de communication sans fil
US10009800B2 (en) 2014-07-01 2018-06-26 Lg Electronics Inc. Method and system for performing handover from a fixed cell to a mobile cell
WO2022131242A1 (fr) * 2020-12-15 2022-06-23 Sharp Kabushiki Kaisha Resélection de cellule sur la base d'informations de mobilité de cellule

Also Published As

Publication number Publication date
JP2013502783A (ja) 2013-01-24

Similar Documents

Publication Publication Date Title
WO2011020481A1 (fr) Procédé d'assistance à des décisions de transfert intercellulaire d'un terminal mobile dans un réseau de communication cellulaire mobile
Pan et al. An enhanced handover scheme for mobile relays in LTE-A high-speed rail networks
EP2745567B1 (fr) Fonctionnement d'un relais mobile dépendant d'un état de mobilité
EP2883390B1 (fr) Contrôle de la mobilité du client dans des réseaux sans fil hétérogènes
US8385918B2 (en) Radio communication system, base station apparatus, terminal apparatus, and radio link setting method in radio communication system
KR101761811B1 (ko) 무선 통신 시스템에서 매크로 기지국과 차량 기지국간의 핸드오버 지원 방법 및 시스템
JP4376916B2 (ja) 移動機のハンドオーバの支援方法、無線ネットワーク制御装置、無線基地局、およびコンピュータプログラム
EP2600654B1 (fr) Station de base sans fil et son procédé de commande
EP2424321A1 (fr) Equipement utilisateur et son procédé d'accès
EP2549825A1 (fr) Station-relais et procédé de commande de communication
WO2011030862A1 (fr) Système de communication sans fil, station radio de base et procédé de commande de transfert intercellulaire
US9596629B2 (en) Systems and methods for transparent point-to-point handovers of a mobile relay
CN102480755A (zh) 向Femtocell进行激活切换的方法及适用于该方法的位置信息服务器
CN103404201A (zh) 异质网络中小小区发现方法
KR20120035665A (ko) 차량 내부 사용자를 위한 차량형 액세스 포인트, 차량형 사용자 장치 및 매크로 기지국의 통신 방법
CN101253792A (zh) 在无线移动通信系统中由处于节能模式的移动站执行与交接相关的操作的方法
US20080117866A1 (en) Wireless communications using overlay network devices within coverage areas of underlay network devices
JP4365287B2 (ja) 移動通信ネットワーク
EP2916591B1 (fr) Sélection d'une cellule dans un réseau de communication cellulaire sans fil
US20240040540A1 (en) Neighboring cell mobility information for vehicle-mounted relays
JP2013090203A (ja) 無線通信システム、ハンドオーバ制御方法及び基地局
KR101655450B1 (ko) 이동통신 시스템에서 이동 네트워크 운영 방법 및 장치
JP2019071569A (ja) 無線基地局装置、移動局の制御方法及びプログラム
CN105103597A (zh) 无线通信小区检测技术
JPWO2015015886A1 (ja) 通信システム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09777977

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2012525045

Country of ref document: JP

122 Ep: pct application non-entry in european phase

Ref document number: 09777977

Country of ref document: EP

Kind code of ref document: A1