WO2008060021A1 - Procédé de transfert intercellulaire avec station relais mobile - Google Patents

Procédé de transfert intercellulaire avec station relais mobile Download PDF

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Publication number
WO2008060021A1
WO2008060021A1 PCT/KR2007/002241 KR2007002241W WO2008060021A1 WO 2008060021 A1 WO2008060021 A1 WO 2008060021A1 KR 2007002241 W KR2007002241 W KR 2007002241W WO 2008060021 A1 WO2008060021 A1 WO 2008060021A1
Authority
WO
WIPO (PCT)
Prior art keywords
handover
base station
mrs
mobile relay
relay station
Prior art date
Application number
PCT/KR2007/002241
Other languages
English (en)
Inventor
Sung-Kyung Kim
Sung-Cheol Chang
Chul-Sik Yoon
Original Assignee
Electronics And Telecommunications Research Institute
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 Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Priority to CN2007800498693A priority Critical patent/CN101578782B/zh
Priority to US12/514,973 priority patent/US20100061339A1/en
Priority claimed from KR1020070043938A external-priority patent/KR101386212B1/ko
Publication of WO2008060021A1 publication Critical patent/WO2008060021A1/fr

Links

Classifications

    • 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
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to a handover method, and more particularly, to a handover method with a mobile relay station (MRS) in a wireless system.
  • MRS mobile relay station
  • FIG. 1 illustrates an example of a mobile relay station (MRS) suggested in IEEE 802.16J.
  • An MRS 110 which is mounted on a mobile means such as a bus, train, or cruise, provides one or more multi-paths in order to provide a high speed wireless internet service to passengers.
  • a handover (HO) function between the MS 120 and a base station (BS) 100 has be considered.
  • hard HO (HHO) FIG. 2a
  • FBSS fast base station switching
  • MDHO macro diversity handover
  • a radio link between the BS 100 and the MRS 110 has a higher quality than a radio link between the BS 100 and the MS 120.
  • the MRS 110 uses a directionality and multi-antenna technique or high quality radio transmission technique. Accordingly, the MRS 110 can provide a high quality wireless environment to the MS 120.
  • the MRS 110 more easily determines a handover time than the MS 120.
  • FIGS. 2a to 2c illustrate the connection relations among an MRS and MSs according to a conventional HO method suggested in IEEE 802.16e.
  • the MSs which receive the service through the MRS operate as though they receive the service from one BS without the MDHO.
  • the MRS can use radio resources of the existing BS within a range in which the MRS does not interfere with a neighbor BS.
  • the FBSS handover shown in FIG. 2b is limited to radio links between the BSs and the MRS. Even when an anchor BS between the MRS and the MSs is changed, the MSs operate as though the MSs communicate with the BS without the anchor change.
  • the MS starts the handover by transmitting a message MOB_MSHO_REQ directly to the BS.
  • the message MOB_MSHO_REQ includes factors (for example, a carrier to interference-plus-noise ratio (CINR), a received signal strength indicator (RSSI), and a relative delay of the BS) which cause the handover, information on one or more target BSs, and the like. Since the message
  • the BS transmits a message MOB_BSHO_RSP to the MS as a response.
  • the message MOB_BSHO__RSP may include identification information BSJD of a neighbor BS to which the MS belongs, a service prediction level of the neighbor BS, an action time, and the like.
  • a service prediction level field is used to represent to which degree a target mobile multi-hop relay BS (target MMR-BS) secures a service of the MS which is being executed in a serving BS.
  • An action time field is used to represent the number of frames used until receiving dedicated radio resources through which the MS can transmit a message RNG-REQ to the target BS.
  • the MS terminates the connection with the serving BS by determining the target MS which is to perform a practical handover (HO) and by transmitting a message MOB_HO_IND to the BS.
  • the message MOBJHOJND includes HOJNDJype and target BSID.
  • FIG. 4 illustrates an HO procedure in a case where MSs cannot directly communicate with BSs among HO methods suggested in IEEE 802.16e.
  • an MS senses a break of communication, searches for a new cell, and performs a procedure of newly entering a network. Since a probability that a plurality of MSs attempt to enter the network at the same time is high, congestion occurs in a random access channel. Accordingly, it takes a long time to enter the network. This causes a long-time break of communication. Therefore, it is difficult to continuously provide a service.
  • FIG. 3 illustrates a handover procedure in a case where MSs can directly communicate with base stations (BSs) among handover methods suggested in IEEE 802.16e.
  • FIG. 4 illustrates a handover (HO) procedure in a case where MSs cannot directly communicate with BSs among handover methods suggested in IEEE 802.16e.
  • FIGS. 5 and 6 illustrate an HO procedure initiated by an MRS according to an embodiment of the present invention.
  • FIGS. 7 and 8 illustrate an HO procedure initiated by a BS according to an embodiment of the present invention.
  • FIG. 9 illustrates an HO procedure by considering backward compatibility of mobile stations (MSs) according to an embodiment of the present invention.
  • FIG. 11 illustrates a format of a group handover request message G_RSHO_REQ according to an embodiment of the present invention.
  • FIG. 12 illustrates a format of a group handover response message G_BSHO_RSP according to an embodiment of the present invention.
  • FIG. 13 illustrates a format of a group handover execution message G_HO_IND according to an embodiment of the present invention.
  • FIG. 14 illustrates a format of a group handover request message G_BSHO_REQ according to an embodiment of the present invention.
  • FIG. 15 illustrates a type/length/value (TLV) to be newly included in a message
  • RNG_REQ according to an embodiment of the present invention.
  • the present invention provides a handover method by a mobile relay station (MRS) or base station (BS) in order to effectively perform a handover of the MRS and mobile stations (MSs) in an environment in which data is communicated through a relay of the MRS.
  • MRS mobile relay station
  • BS base station
  • MSs mobile stations
  • the present invention also provides a handover method capable of securing backward compatibility of an MS during a handover.
  • a handover method for a Mobile Relay Station including transmitting a handover request message to a serving Base Station (BS), wherein the handover request message includes an Identifier (ID) of the Mobile Relay Station; and receiving a handover response message from the serving Base Station, wherein the handover response message indicates that the serving Base Station recognizes handover requests of the Mobile Relay Station and the Mobile Stations which are attached to the Mobile Relay Station.
  • BS serving Base Station
  • ID Identifier
  • a handover method for a Base Station including receiving a handover request message; determining whether the handover request message is from a Mobile Relay Station (MRS) based on an Identifier (ID) included in the handover request message; and transmitting a handover response message to the Mobile Relay Station, wherein the handover response message indicates that handover requests of the Mobile Relay Station and the Mobile Stations which are attached to the Mobile Relay Station are recognized.
  • MRS Mobile Relay Station
  • ID Identifier
  • a handover method in a Base Station including transmitting a handover request message to an Mobile Relay Station (MRS); and receiving a handover execution message from the Mobile Relay Station, wherein the handover execution message includes information on a target Base Station.
  • MRS Mobile Relay Station
  • a handover method for a Mobile Relay Station including transmitting a handover request message to a Base Station (BS), wherein the handover request message includes an Identifier (ID) of the Mobile Relay Station; receiving a handover response message from the Base Station, wherein the handover response message indicates that the Base Station recognizes a handover request of the Mobile Relay Station; transmitting a handover execution message to the Base Station, wherein the handover execution message includes information on a target Base Station; transmitting a ranging request message to the target Base Station; receiving a ranging response message from the target Base Station, wherein the ranging response message includes first Identifiers that are newly assigned to the Mobile Stations which are attached to the Mobile Relay Station; and generating a mapping relation between second IDs that are previously assigned to the Mobile Stations and the first IDs that are newly assigned to the Mobile Stations.
  • BS Base Station
  • ID Identifier
  • ADVANTAGEOUS EFFECTS since handovers of a mobile relay station (MRS) and mobile stations (MSs) which are attached to the MRS are initiated by the MRS or base stations (BSs), it is possible to reduce breaks of communication to effectively use radio resources.
  • MRS mobile relay station
  • MSs mobile stations
  • BSs base stations
  • a handover method for a Mobile Relay Station including transmitting a handover request message to a serving Base Station (BS), wherein the handover request message includes an Identifier (ID) of the Mobile Relay Station; and receiving a handover response message from the serving Base Station, wherein the handover response message indicates that the serving Base Station recognizes handover requests of the Mobile Relay Station and the Mobile Stations which are attached to the Mobile Relay Station.
  • BS serving Base Station
  • ID Identifier
  • a handover method for a Base Station including receiving a handover request message; determining whether the handover request message is from a Mobile Relay Station (MRS) based on an Identifier (ID) included in the handover request message; and transmitting a handover response message to the Mobile Relay Station, wherein the handover response message indicates that handover requests of the Mobile Relay Station and the Mobile Stations which are attached to the Mobile Relay Station are recognized.
  • MRS Mobile Relay Station
  • ID Identifier
  • a handover method in a Base Station including transmitting a handover request message to an Mobile Relay Station (MRS); and receiving a handover execution message from the Mobile Relay Station, wherein the handover execution message includes information on a target Base Station.
  • MRS Mobile Relay Station
  • a handover method for a Mobile Relay Station including transmitting a handover request message to a Base Station (BS) 1 wherein the handover request message includes an Identifier (ID) of the Mobile Relay Station; receiving a handover response message from the Base Station, wherein the handover response message indicates that the Base Station recognizes a handover request of the Mobile Relay Station; transmitting a handover execution message to the Base Station, wherein the handover execution message includes information on a target Base Station; transmitting a ranging request message to the target Base Station; receiving a ranging response message from the target Base Station, wherein the ranging response message includes first Identifiers that are newly assigned to the Mobile Stations which are attached to the Mobile Relay Station; and generating a mapping relation between second IDs that are previously assigned to the Mobile Stations and the first IDs that are newly assigned to the Mobile Stations.
  • BS Base Station
  • ID Identifier
  • FIG. 5 illustrates a handover (HO) procedure initiated by an MRS according to an embodiment of the present invention.
  • the ID of the MRS 510 and IDs (for example, CIDs of MAC headers) of mobile stations (MSs) 500 and 502 which are attached to the MRS 510 are previously known to the serving BS 520 through a backbone network.
  • the serving BS 520 transmits the handover request message (for example, the message MOB_BSHO_REQ) to the subordinate MSs 500 and 502 of the MRS 510 (S560 and S562).
  • the serving BS sets an HO operation mode of the message MOB_BSHO_REQ to 1 and transmits the message.
  • the serving BS 520 can set the action time field so as to assign a dedicated transmission opportunity for the message RNG_REQ transmitted from the MS.
  • the MSs 500 and 502 transmit the handover execution messages (for example, the messages MOB_HO_IND) to the serving BS 520 via the MRS 510 (S564 and S566).
  • the MRS 510 and the subordinate MSs 500 and 502 of the MRS 510 perform a ranging procedure (a procedure of transmitting a ranging request message (for example, the message RNG_REQ) (S570, S574, and S578) and receiving a ranging response message (for example, the message RNG_RSP) (S572, S576, and S580)) with the target BS 530.
  • a ranging procedure a procedure of transmitting a ranging request message (for example, the message RNG_REQ) (S570, S574, and S578) and receiving a ranging response message (for example, the message RNG_RSP) (S572, S576, and S580)) with the target BS 530.
  • the messages defined in IEEE 802.16e are used as examples of the messages used to perform the handover and the ranging procedure of the MSs. Messages having different formats may be defined and used for the same object. When the formats of the messages are changed due to a change of IEEE 802.
  • FIG. 6 illustrates a HO procedure initiated by an MRS according to another embodiment of the present invention.
  • an MRS 610 transmits a group handover request message to a serving BS 620 (S650).
  • the group handover request message includes information needed for an HO procedure among information on the subordinate MSs 600 and 602 of the MRS 610 and information of the message MOB_MSHO_REQ defined in IEEE 802.16e.
  • a message G_RSHO_REQ (Group RS HO Request) is defined as the group handover request message.
  • FIG. 11 illustrates a format of the message G_RSHO_REQ according to an embodiment of the present invention.
  • the MRS 610 When receiving the handover execution message from all the MSs, the MRS 610 transmits the group handover execution message to the serving BS 620 (S670).
  • the group handover execution message includes information on whether the MSs perform the practical handover and information on the MSs to be handovered. As an example
  • the MRS 610 terminates the connection with the serving BS 620 and performs a procedure of entering a network for the target BS 630. At this time, the MRS 610 transmits a group ranging request message including ranging requests of the MRS 610 and the subordinate MSs of the MRS 610 to the target BS 630 (S680).
  • the group ranging request message may use the message RNG_REQ defined in IEEE 802.16e.
  • the MRS 610 can omit a random access procedure using HO codes and directly transmit the RNG-REQ message without a collision.
  • the target BS 630 When receiving the group ranging request message from the MRS 610, the target BS 630 can know the number of MSs which attempt to newly enter a cell by recognizing the Group HO indication field in the message. Therefore, the target BS
  • the target BS 630 can change an amount of radio resources required by a random access channel.
  • the target BS 630 transmits a ranging response message to the MRS 610
  • FIG. 7 illustrates a HO procedure initiated by a BS according to an embodiment of the present invention.
  • a serving BS 720 transmits a handover request message to an MRS 710 (S750).
  • the handover request message may be the existing message MOB_BSHO_REQ defined in IEEE 802.16e or a newly defined message.
  • the handover execution message may be the existing message MOBJHOJND defined in
  • IEEE 802.16e or a newly defined message.
  • FIG. 8 illustrates an HO procedure initiated by a BS according to another embodiment of the present invention. Referring to FIG. 8, when a handover of an MRS 810 is necessary, the serving
  • the BS 820 transmits a group handover request message to the MRS 810 (S800).
  • the group handover request message includes information on MSs to be group-handovered and information on neighbor BSs.
  • a message G_BSHO_REQ Group HO Indication
  • MRS 810 performs an HO procedure that is the same as the procedure illustrated in
  • FIG. 6 Since the HO procedure is performed as illustrated in FIG. 6, the detailed description on the HO procedure will be omitted.
  • FIG. 9 illustrates an HO procedure by considering backward compatibility of MSs according to an embodiment of the present invention.
  • an MRS 910 transmits a handover request message including an ID of the MRS 910 to a serving BS 920 (S950).
  • the serving BS 920 transmits MAC addresses, service flow identifiers (SFIDs),
  • CIDs, and the like of MSs 900 and 902 included a relay area of the MRS 910 to a target
  • the serving BS 920 receives HOJD from the target BS 930 and transmits a handover response message including the HOJD to the MRS 910 (S952).
  • the handover response message may be the existing message MOB_BSHO_RSP defined in IEEE 802.16e or a newly defined message.
  • the MRS determines a target
  • the handover execution message may be the existing message MOBJHOJND defined in
  • the MRS 910 shares a security association with the target BS 930, the MRS 910 transmits the ranging request message including HMAC/CMAC.
  • the MRS 910 enables the target BS 930 to access the serving BS 920 through a backbone network and receive information on MAC addresses and CIDs of the MSs 900 and 902 by transmitting the ID of the serving BS 920 (BS ID) to the target BS 930.
  • New CIDs may be assigned to the MSs.
  • the target BS 930 transmits a ranging response message including new CIDs which are newly assigned to the MSs 900 and 902 and old CIDs which are previous CIDs of the MSs 900 and 902 to the MRS 910 (S962).
  • the ranging response message may be the existing message RNG_RSP defined in IEEE 802.16e or a newly defined message.
  • the MRS 910 generates a mapping relation between the new CIDs and the old
  • CIDs included in the ranging response message and changes CIDs of downlink frames toward the MSs and uplink frames toward the target BS to new CIDs based on the mapping relation.

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

Abstract

Cette invention concerne un procédé de transfert intercellulaire exécuté par une station relais mobile (MRS) ou une station de base (BS) de manière à assurer une exécution efficace d'un transfert intercellulaire de la station relais mobile et des stations mobiles (MS) dans un environnement dans lequel les données sont transmises par l'intermédiaire d'un relais de la station relais mobile (MRS). Cette invention concerne également un procédé de transfert intercellulaire permettant de garantir la compatibilité amont d'un station mobile (MS) pendant un transfert intercellulaire. L'invention concerne également un procédé de transfert intercellulaire impliquant une station relais mobile (MRS). Il est possible d'améliorer l'efficacité du transfert intercellulaire en permettant le déclenchement des transferts intercellulaires de la station relais mobile et des MS vers lesquelles la MRS transmet les données, par la MRS ou la station de base. Il est possible de garantir la compatibilité amont des MS en permettant à la MRS de générer et de gérer une relation de mappage entre les informations relatives aux identifiants de communication (CID) des MS1 qui sont modifiées pendant le transfert intercellulaire, et les informations relatives aux identifiants de communication (CID) précédentes des MS.
PCT/KR2007/002241 2006-11-14 2007-05-07 Procédé de transfert intercellulaire avec station relais mobile WO2008060021A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2007800498693A CN101578782B (zh) 2006-11-14 2007-05-07 利用移动中继站的切换方法
US12/514,973 US20100061339A1 (en) 2006-11-14 2007-05-07 Handover method with mobile relay station

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2006-0112454 2006-11-14
KR20060112454 2006-11-14
KR10-2007-0043938 2007-05-07
KR1020070043938A KR101386212B1 (ko) 2006-11-14 2007-05-07 이동 중계기를 고려한 핸드오버 방법

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011000161A1 (fr) * 2009-07-02 2011-01-06 华为技术有限公司 Procédé et dispositif de transfert
WO2011019973A3 (fr) * 2009-08-12 2011-05-19 Qualcomm Incorporated Procédé et dispositif pour une conception de liaison terrestre de relais dans un système de communication sans fil
CN102111806A (zh) * 2011-02-14 2011-06-29 电信科学技术研究院 目标小区选取方法、系统和设备
CN102428723A (zh) * 2009-05-15 2012-04-25 阿尔卡特朗讯公司 多流无线中继器
CN102474802A (zh) * 2009-08-12 2012-05-23 高通股份有限公司 用于无线通信系统中的中继回程设计的方法和装置
US20130223328A1 (en) * 2010-11-04 2013-08-29 Fujitsu Limited Radio communication method, relay station and mobile station
US8611333B2 (en) 2009-08-12 2013-12-17 Qualcomm Incorporated Systems and methods of mobile relay mobility in asynchronous networks
US8781477B2 (en) 2009-12-31 2014-07-15 Huawei Technologies Co., Ltd. Handover method and system in relay network, relay node, control base station and base station
TWI473511B (zh) * 2011-03-29 2015-02-11 Innovative Sonic Corp 在無線通訊系統中改善高速移動性的方法及裝置
EP2530973A4 (fr) * 2010-01-26 2017-07-26 Kyocera Corporation Station relais sans fil et son procede de commande

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1594336A2 (fr) * 2004-05-07 2005-11-09 Samsung Electronics Co., Ltd. Système et procédé de transfert capable de réduire au minimum le retard de service dans un système d'accès de communication sans fil à bande large
EP1605633A2 (fr) * 2004-06-07 2005-12-14 Samsung Electronics Co., Ltd. Système et procédé pour le transfert dans un système de communication BWA
US20050282548A1 (en) * 2004-06-07 2005-12-22 Samsung Electronics Co., Ltd. System and method for optimizing handover in mobile communication system
WO2006101368A1 (fr) * 2005-03-24 2006-09-28 Lg Electronics Inc. Methode d'execution d'un transfert dans un systeme d'acces sans fil a large bande

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1594336A2 (fr) * 2004-05-07 2005-11-09 Samsung Electronics Co., Ltd. Système et procédé de transfert capable de réduire au minimum le retard de service dans un système d'accès de communication sans fil à bande large
EP1605633A2 (fr) * 2004-06-07 2005-12-14 Samsung Electronics Co., Ltd. Système et procédé pour le transfert dans un système de communication BWA
US20050282548A1 (en) * 2004-06-07 2005-12-22 Samsung Electronics Co., Ltd. System and method for optimizing handover in mobile communication system
WO2006101368A1 (fr) * 2005-03-24 2006-09-28 Lg Electronics Inc. Methode d'execution d'un transfert dans un systeme d'acces sans fil a large bande

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102428723A (zh) * 2009-05-15 2012-04-25 阿尔卡特朗讯公司 多流无线中继器
WO2011000161A1 (fr) * 2009-07-02 2011-01-06 华为技术有限公司 Procédé et dispositif de transfert
KR101420248B1 (ko) 2009-08-12 2014-07-17 퀄컴 인코포레이티드 무선 통신 시스템에서 중계 백홀 설계를 위한 방법 및 장치
WO2011019973A3 (fr) * 2009-08-12 2011-05-19 Qualcomm Incorporated Procédé et dispositif pour une conception de liaison terrestre de relais dans un système de communication sans fil
EP2465297B1 (fr) * 2009-08-12 2017-10-11 1/6 Qualcomm Incorporated Procédé et appareil destiné à la conception des liaisons terrestres des relais dans un système de radiocommunications
CN102474802A (zh) * 2009-08-12 2012-05-23 高通股份有限公司 用于无线通信系统中的中继回程设计的方法和装置
US9210622B2 (en) 2009-08-12 2015-12-08 Qualcomm Incorporated Method and apparatus for relay backhaul design in a wireless communication system
US9125133B2 (en) 2009-08-12 2015-09-01 Qualcomm Incorporated Method and apparatus for relay backhaul design in a wireless communication system
US8611333B2 (en) 2009-08-12 2013-12-17 Qualcomm Incorporated Systems and methods of mobile relay mobility in asynchronous networks
US8781477B2 (en) 2009-12-31 2014-07-15 Huawei Technologies Co., Ltd. Handover method and system in relay network, relay node, control base station and base station
US8923869B2 (en) * 2009-12-31 2014-12-30 Huawei Technologies Co., Ltd. Handover method and system in relay network, relay node, control base station and base station
US20150079993A1 (en) * 2009-12-31 2015-03-19 Huawei Techhologies Co., Ltd. Handover method and system in relay network, relay node, control base station and base station
US9301231B2 (en) 2009-12-31 2016-03-29 Huawei Technologies Co., Ltd. Handover method and system in relay network, relay node, control base station and base station
EP2530973A4 (fr) * 2010-01-26 2017-07-26 Kyocera Corporation Station relais sans fil et son procede de commande
US20130223328A1 (en) * 2010-11-04 2013-08-29 Fujitsu Limited Radio communication method, relay station and mobile station
US9565597B2 (en) * 2010-11-04 2017-02-07 Fujitsu Limited Radio communication method, relay station and mobile station
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
CN102111806A (zh) * 2011-02-14 2011-06-29 电信科学技术研究院 目标小区选取方法、系统和设备
TWI473511B (zh) * 2011-03-29 2015-02-11 Innovative Sonic Corp 在無線通訊系統中改善高速移動性的方法及裝置

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