WO2010150777A1 - Mobile communication method, radio base station, and relay node - Google Patents

Mobile communication method, radio base station, and relay node Download PDF

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Publication number
WO2010150777A1
WO2010150777A1 PCT/JP2010/060550 JP2010060550W WO2010150777A1 WO 2010150777 A1 WO2010150777 A1 WO 2010150777A1 JP 2010060550 W JP2010060550 W JP 2010060550W WO 2010150777 A1 WO2010150777 A1 WO 2010150777A1
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Prior art keywords
base station
radio base
relay node
rrc connection
connection
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PCT/JP2010/060550
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French (fr)
Japanese (ja)
Inventor
秀明 高橋
ウリ アンダルマワンティ ハプサリ
アニール ウメシュ
幹生 岩村
美波 石井
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株式会社エヌ・ティ・ティ・ドコモ
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Publication of WO2010150777A1 publication Critical patent/WO2010150777A1/en

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    • 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
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/22—Manipulation of transport 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 mobile communication method, a radio base station, and a relay node.
  • LTE-Advanced mobile communication system which is a successor of LTE (Long Term Evolution)
  • a function similar to that of the radio base station DeNB is provided between the mobile station UE and the radio base station DeNB (Donor eNB). It can be connected to a “Relay Node RN”.
  • an E-RAB E-UTRAN Radio Access Bearer
  • the core node CN Core Node
  • the mobile station UE and the relay node RN are connected.
  • the Un radio bearer is set, and the S1 bearer is set between the radio base station DeNB and the core node CN. It is configured.
  • the relay node RN receives a downlink signal from the radio base station DeNB (reception process in the Un radio bearer).
  • the relay node RN Between the mobile node UE and the relay node RN to the downlink signal transmission process (transmission process in the Uu radio bearer), or the relay node RN receives the uplink signal from the mobile station UE (reception process in the Uu radio bearer) It is difficult to avoid collision between the relay node RN and the uplink signal transmission process to the radio base station DeNB (transmission process in the Un radio bearer), and the transmission signal of the relay node RN wraps around the receiver of the RN itself There is a problem that the possibility that interference will occur increases.
  • An object of the present invention is to provide a mobile communication method, a radio base station, and a relay node that can perform communication.
  • a first feature of the present invention is a mobile communication method, in which a relay node performs a synchronization process with a radio base station based on broadcast information transmitted by the radio base station; When the relay node establishes a connection with the radio base station, the relay node includes a step B of notifying the radio base station of the result of the synchronization process.
  • the second feature of the present invention is a radio base station, and when establishing a connection with a relay node, obtains a result of synchronization processing with the radio base station performed by the relay node.
  • An acquisition unit configured to perform a synchronization processing request unit configured to request the relay node to perform the synchronization processing when the result of the synchronization processing is unsuccessful;
  • the gist is to provide.
  • a third feature of the present invention is a relay node, which is configured to perform synchronization processing with a radio base station based on broadcast information transmitted by the radio base station. And a notification unit configured to notify the result of the synchronization processing to the radio base station when setting up a connection with the radio base station. .
  • a fourth feature of the present invention is a mobile communication method, in which a relay node starts a radio frame between the relay node and the radio base station based on broadcast information transmitted by the radio base station.
  • a fifth feature of the present invention is a relay node, which measures a deviation of a start position of a radio frame between the relay node and the radio base station based on broadcast information transmitted by the radio base station.
  • the radio base station When establishing a connection between the synchronization processing unit configured to do so and the radio base station, the radio base station is configured to notify the radio base station of the deviation of the start position of the radio frame.
  • the notification section is provided.
  • a mobile communication method capable of reducing interference to the receiver of the relay node itself caused by collision between transmission / reception processing in the Un radio bearer and transmission / reception processing in the Uu radio bearer, A radio base station and a relay node can be provided.
  • FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
  • FIG. 2 is a functional block diagram of the relay node according to the first embodiment of the present invention.
  • FIG. 3 is a diagram illustrating an example of a format of “RRC Connection Reconfiguration Complete” in the mobile communication system according to the first embodiment of the present invention.
  • FIG. 4 is a functional block diagram of the radio base station according to the first embodiment of the present invention.
  • FIG. 5 is a sequence diagram showing operations of the mobile communication system according to the first embodiment of the present invention.
  • FIG. 6 is a sequence diagram showing an operation of the mobile communication system according to the first modification of the first embodiment of the present invention.
  • FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
  • FIG. 2 is a functional block diagram of the relay node according to the first embodiment of the present invention.
  • FIG. 3 is a diagram illustrating an example of a format of “RRC Connection Re
  • FIG. 7 is a sequence diagram showing an operation of the mobile communication system according to the second modification of the first embodiment of the present invention.
  • FIG. 8 is a sequence diagram showing an operation of the mobile communication system according to the third modification of the first embodiment of the present invention.
  • FIG. 9 is a sequence diagram illustrating an operation of the mobile communication system according to the fourth modification of the first embodiment of the present invention.
  • the mobile communication system is an LTE-Advanced mobile communication system, and includes core nodes (for example, a gateway device S-GW and an exchange MME) in a core network node. , Radio base station DeNB, relay node RN and the like.
  • core nodes for example, a gateway device S-GW and an exchange MME
  • Radio base station DeNB Radio base station DeNB
  • relay node RN relay node RN and the like.
  • a Uu radio bearer is set between the radio base station DeNB and the mobile station UE, and an Un radio bearer is set between the radio base station DeNB and the relay node RN.
  • the Uu radio bearer is set between the relay node RN and the mobile station UE.
  • the radio base station DeNB and the relay node RN are configured to transmit an uplink signal and a downlink signal by a time division multiplexing method.
  • the relay node RN includes a reception unit 11, a synchronization processing unit 12, a transmission unit 13, and a scheduling unit 14.
  • the receiving unit 11 is configured to receive a downlink signal transmitted from the radio base station DeNB via the Un radio bearer and an uplink signal transmitted from the mobile station UE via the Uu radio bearer.
  • the receiving unit 11 is configured to receive broadcast information transmitted by the radio base station DeNB and acquire an SFN (System Frame Number) included in the broadcast information.
  • SFN System Frame Number
  • the reception unit 21 changes the configuration of the RRC connection set between the relay node RN and the radio base station DeNB when setting the RRC connection between the relay node RN and the radio base station DeNB.
  • the radio base station DeNB may be configured to acquire the transmission timing of an MBSFN (Multicast Broadcast Single Frequency Network) subframe.
  • MBSFN Multicast Broadcast Single Frequency Network
  • the MBSFN subframe is a subframe used in MBSFN communication.
  • the MBSFN subframe also includes an MBSFN subframe that is defined so as not to transmit a control signal OFDM symbol called a “Blank subframe” in a 3GPP meeting.
  • the synchronization processing unit 12 is configured to perform synchronization processing with the radio base station DeNB based on broadcast information transmitted by the radio base station DeNB.
  • the synchronization processing unit 12 is configured to perform the SFN synchronization process with the radio base station DeNB based on the broadcast information transmitted by the radio base station DeNB and the transmission timing of the MBSFN subframe.
  • the SFN synchronization process means a process for matching the heads of radio frames specified by the SFN between the relay node RN and the radio base station DeNB.
  • the transmission unit 13 is configured to transmit an uplink signal to the radio base station DeNB via the Un radio bearer and to transmit a downlink signal to the mobile station UE via the Uu radio bearer.
  • the transmission unit 13 is configured to notify the radio base station DeNB of the result of the SFN synchronization process when setting the RRC connection between the relay node RN and the radio base station DeNB.
  • the transmission unit 13 may be configured to notify the radio base station DeNB of the result of the SFN synchronization process by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure. Good.
  • the transmission unit 13 may set the result (success / failure) of the SFN synchronization process in the information element “noncriticalExtensions” (Z) in the “RRC Connection Reconfiguration Complete”.
  • the scheduling unit 14 is configured to perform scheduling related to the mobile station UE under the relay node RN.
  • the scheduling unit 14 may be configured to perform scheduling so as to transmit a downlink signal at a timing other than the transmission timing of the MBSFN subframe.
  • the radio base station DeNB includes a transmission unit 21, a reception unit 22, and a scheduling unit 23.
  • the transmission unit 21 transmits a downlink signal to the relay node RN via the Un radio bearer, transmits a downlink signal to the mobile station UE via the Uu radio bearer, and transmits an uplink signal to the core node CN. Is configured to do.
  • the transmission unit 21 is configured to transmit the broadcast information including the above-described SFN in a cell under the radio base station DeNB.
  • the transmission unit 12 may be configured to notify the relay node RN of the transmission timing of the above MBSFN subframe.
  • the receiving unit 22 receives an uplink signal transmitted from the relay node RN via the Un radio bearer, an uplink signal transmitted from the mobile station UE via the Uu radio bearer, and a downlink signal transmitted from the core node CN. It is configured as follows.
  • the receiving unit 22 receives “RRC Connection Reconfiguration Complete” transmitted from the relay node RN in the procedure of setting the RRC connection between the radio base station DeNB and the relay node RN, and receives the “RRC Connection Reconfiguration Complete” from the “RRC Connection Reconfiguration Complete”.
  • the result of the SFN synchronization process described above may be acquired.
  • the scheduling unit 23 is configured to perform scheduling related to the relay node RN and the mobile station UE under the radio base station DeNB.
  • the scheduling unit 23 may be configured to perform scheduling so that a downlink signal is transmitted at the transmission timing of the MBSFN subframe.
  • step S1001 the relay node RN transmits “RRC Connection Request” to the radio base station DeNB at the time of activation.
  • step S1002 the radio base station DeNB transmits “RRC Connection Setup” to the relay node RN.
  • step S1003 the relay node RN transmits “RRC Connection Setup Complete” including “Attach Request” to the radio base station DeNB.
  • step S1004 the radio base station DeNB transmits “Initial UE Message” including “Attach Request” to the core node CN.
  • step S1005 after the “Authentication / Security process” is completed between the relay node RN and the core node CN, in step S1006, the core node CN sends the “Initial Context” including “Attach Accept” to the radio base station DeNB. Send “Setup Request”.
  • step S1007 the radio base station DeNB transmits “RRC RN (UE) Capability Enquiry” to the relay node RN.
  • step S1008 the relay node RN transmits “RRC RN (UE) Capability Information” to the radio base station DeNB.
  • step S1009 the radio base station DeNB transmits “(UE) Capability Info Indication” to the core node CN.
  • the radio base station DeNB transmits “Security Mode Command” to the relay node RN in Step S1010, and transmits “RRC Connection Reconfiguration” including “Attach Accept” in Step S1011.
  • the radio base station DeNB may notify the relay node RN of the transmission timing of the MBSFN subframe described above by “RRC Connection Reconfiguration”.
  • the relay node RN transmits “Security Mode Complete” to the radio base station DeNB in step S1012, and transmits “RRC Connection Reconfiguration Complete” in step S1013.
  • the relay node RN performs SFN synchronization processing performed on the radio base station DeNB based on the broadcast information transmitted by the radio base station DeNB and the transmission timing of the MBSFN subframe by “RRC Connection Reconfiguration Complete”. Notify the result of.
  • step S1014 the radio base station DeNB transmits “Initial Context Setup Response” to the core node CN.
  • step S1015 the relay node RN transmits “Attach Complete” to the core node CN.
  • the radio base station DeNB can recognize whether or not SFN synchronization is established between the relay node RN and the radio base station DenB. By controlling resources in the relay node RN, it is possible to reduce the occurrence of interference in the resource node RN.
  • Modification 1 With reference to FIG. 6, a mobile communication system according to Modification 1 of the first embodiment of the present invention will be described. Hereinafter, the mobile communication system according to the first modification will be described by focusing on differences from the above-described mobile communication system according to the first embodiment of the present invention.
  • the transmission unit 13 of the relay node RN performs the above-described SFN synchronization processing on the radio base station DeNB by “Un Setup Request” instead of “RRC Connection Reconfiguration Complete”. The result may be notified.
  • the “Un Setup Request” is not defined in the existing RRC connection setting procedure, but is a signal used in a procedure newly defined between the radio base station DeNB and the relay node RN.
  • the reception unit 22 of the radio base station DeNB may be configured to acquire the result of the SFN synchronization process in the relay node RN from the “Un Setup Request” described above.
  • step S2011 the relay node RN does not notify the radio base station DeNB of the result of the SFN synchronization process in the relay node RN by “RRC Connection Reconfiguration Complete”.
  • step S2016 the relay node RN transmits “Un Setup Request” requesting the radio base station DeNB to set an Un radio bearer between the relay node RN and the radio base station DeNB.
  • the relay node RN notifies the radio base station DeNB of the result of the SFN synchronization process in the relay node RN by “Un Setup Request”.
  • step S2017 the radio base station DeNB transmits “Un Setup Response” to the relay node RN.
  • Modification 2 With reference to FIG. 7, a mobile communication system according to Modification 2 of the first embodiment of the present invention will be described.
  • the mobile communication system according to the second modification will be described by focusing on differences from the above-described mobile communication system according to the first embodiment of the present invention.
  • the transmission unit 13 of the relay node RN performs the above-described SFN synchronization process on the radio base station DeNB by “Un RN Configuration Indication” instead of “RRC Connection Reconfiguration Complete”. The result may be notified.
  • Un RN Configuration Indication is not defined in the existing RRC connection setting procedure, but is a signal used in a procedure newly defined between the radio base station DeNB and the relay node RN.
  • the reception unit 22 of the radio base station DeNB may be configured to acquire the result of the SFN synchronization process in the relay node RN from the “Un RN Configuration Indication” described above.
  • step S3011 the relay node RN does not notify the radio base station DeNB of the result of the SFN synchronization processing in the relay node RN by “RRC Connection Reconfiguration Complete”.
  • Step S3016 the relay node RN notifies the radio base station DeNB of “Un RN Configuration Indication” that notifies the configuration of the Un radio bearer as a radio relay base station between the relay node RN and the radio base station DeNB. Send.
  • the relay node RN notifies the radio base station DeNB of the result of the SFN synchronization process in the relay node RN by “Un RN Configuration Indication”.
  • Modification 3 With reference to FIG. 8, a mobile communication system according to Modification 3 of the first embodiment of the present invention is described. Hereinafter, the mobile communication system according to the third modification will be described by focusing on differences from the above-described mobile communication system according to the first embodiment of the present invention.
  • the transmission unit 21 of the radio base station DeNB detects that the result of the SFN synchronization process by the relay node RN is failure, the SFN synchronization process is performed on the relay node RN. Is configured to request to do.
  • the transmission unit 21 may be configured to request to perform the SFN synchronization process by a signal for changing the configuration of the RRC connection, for example, “RRC Connection Reconfiguration”.
  • step S4002 when the radio base station DeNB detects a predetermined trigger in step S4001, in step S4002, the radio base station DeNB selects “RRC for changing the configuration of the RRC connection that has already been set for the relay node RN. Send "Connection Reconfiguration”.
  • the radio base station DeNB requests the relay node RN to perform the SFN synchronization process by “RRC Connection Reconfiguration”.
  • step S4003 the relay node RN performs an SFN synchronization process with the radio base station DeNB, and transmits “RRC Connection Reconfiguration Complete” including the result of the SFN synchronization process to the radio base station DeNB.
  • Modification 4 With reference to FIG. 9, a mobile communication system according to Modification 4 of the first embodiment of the present invention is described. Hereinafter, the mobile communication system according to the first modification will be described by focusing on differences from the above-described mobile communication system according to the first embodiment of the present invention.
  • the transmission unit 21 of the radio base station DeNB detects that the result of the SFN synchronization process by the relay node RN is failure, the SFN synchronization process is performed on the relay node RN. Is configured to request to do.
  • the transmission unit 21 may be configured to request to perform the SFN synchronization process by a signal for changing the configuration of the RRC connection, for example, “Un RN Reconfiguration”.
  • Un RN Reconfiguration is a signal used in a procedure newly defined between the radio base station DeNB and the relay node RN.
  • step S5002 when the radio base station DeNB detects a predetermined trigger in step S5001, in step S5002, the radio base station DeNB sets “Un” for changing the configuration of the RRC connection that has already been set for the relay node RN. RN Reconfiguration "is transmitted.
  • the radio base station DeNB requests the relay node RN to perform the SFN synchronization process by “Un RN Reconfiguration”.
  • step S5003 the relay node RN performs an SFN synchronization process with the radio base station DeNB, and transmits “Un RN Reconfiguration Complete” including a result of the SFN synchronization process to the radio base station DeNB.
  • Un RN Reconfiguration Complete is a signal used in a procedure newly defined between the radio base station DeNB and the relay node RN.
  • the synchronization processing unit 12 of the relay node RN transmits the relay node RN.
  • the number of frames of the SFN of the radio frame to be transmitted and the SFN of the radio frame transmitted by the second radio base station S-DeNB at the same time (SFN between the relay node RN and the second radio base station S-DeNB ( It may be configured to measure a deviation of the start position (radio frame) of the radio frame and notify the radio base station DeNB of the measurement result using “RRC Connection Reconfiguration Complete” or the like.
  • the reception unit 22 of the radio base station DeNB transmits the SFN of the radio frame transmitted by the relay node RN and the radio transmitted by the second radio base station S-DeNB from the “RRC Connection Reconfiguration Complete” transmitted by the relay node RN. It may be configured to acquire how many frames are deviated from the SFN of the frame at the same time (SFN deviation between the relay node RN and the second radio base station S-DeNB).
  • a first feature of the present embodiment is a mobile communication method, in which a relay node RN performs SFN synchronization processing (synchronization) with a radio base station DeNB based on broadcast information transmitted by the radio base station DeNB. Step A for performing processing) and Step B for notifying the radio base station DeNB of the result of the SFN synchronization processing when the relay node RN sets up an RRC connection (connection) with the radio base station DeNB. It is summarized as having.
  • step B the relay node RN transmits the result of the SFN synchronization process to the radio base station DeNB by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure. You may be notified.
  • the radio base station DeNB further includes a step C for requesting the relay node RN to perform the SFN synchronization process when the result of the SFN synchronization process is unsuccessful. Also good.
  • the radio base station DeNB requests to perform the SFN synchronization process by a signal for changing the configuration of the RRC connection, for example, “RRC Connection Reconfiguration”. Also good.
  • the second feature of the present embodiment is the radio base station DeNB, which is the SFN synchronization with the radio base station DeNB performed by the relay node RN when setting up the RRC connection with the relay node RN.
  • the relay node RN is configured to request the SFN synchronization process to be performed.
  • the gist is that the transmitter 21 is provided.
  • the receiving unit 22 may be configured to acquire the result of the SFN synchronization processing from “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure.
  • the transmission unit 21 is configured to request to perform the SFN synchronization process by a signal for changing the configuration of the RRC connection, for example, “RRC Connection Reconfiguration”. Also good.
  • a third feature of the present embodiment is a relay node RN, which is configured to perform SFN synchronization processing with the radio base station DeNB based on broadcast information transmitted by the radio base station DeNB.
  • the transmission unit 13 configured to notify the radio base station DeNB of the result of the SFN synchronization process.
  • the gist is to provide.
  • the transmission unit 13 notifies the radio base station DeNB of the result of the SFN synchronization process by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure. It may be configured.
  • a fourth feature of the present embodiment is a mobile communication method, in which the relay node RN is based on broadcast information transmitted by the radio base station DeNB, and the SFN between the relay node RN and the radio base station DeNB.
  • the relay node RN sets up the RRC connection with the radio base station DeNB, the process A for measuring the difference between the relay node RN and the radio base station DeNB (step A). And a step B of notifying the radio base station DeNB of the deviation of the SFN described above.
  • step B the relay node RN causes the above-described SFN shift to the radio base station DeNB by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setup procedure. You may be notified.
  • a fifth feature of the present embodiment is a relay node RN, which is configured to measure the above-described SFN deviation based on broadcast information transmitted by the radio base station DeNB. And a transmission unit 13 configured to notify the radio base station DeNB of the above-described SFN deviation when setting up an RRC connection with the radio base station DeNB. And
  • the transmission unit 13 notifies the radio base station DeNB of the above-described SFN deviation by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure. It may be configured.
  • the operations of the radio base station DeNB, the relay node RN, the core node CN, and the mobile station UE described above may be implemented by hardware, may be implemented by a software module executed by a processor, It may be implemented by a combination.
  • Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in an arbitrary format storage medium such as a CD-ROM.
  • the storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station DeNB, the relay node RN, the core node CN, or the mobile station UE. Further, the storage medium and the processor may be provided in the radio base station DeNB, the relay node RN, the core node CN, and the mobile station UE as discrete components.

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

Abstract

Disclosed is a mobile communication method comprising step A of allowing a relay node (RN) to perform SFN synchronization with a radio base station (DeNB) according to notification information transmitted by a radio base station (DeNB) and step B of allowing the relay node (RN) to notify the radio base station (DeNB) about the result of the SFN synchronization when the relay node (RN) sets up RRC connection to the radio base station (DeNB).

Description

移動通信方法、無線基地局及びリレーノードMobile communication method, radio base station, and relay node
　本発明は、移動通信方法、無線基地局及びリレーノードに関する。 The present invention relates to a mobile communication method, a radio base station, and a relay node.
　ＬＴＥ（Ｌｏｎｇ　Ｔｅｒｍ　Ｅｖｏｌｕｔｉｏｎ）方式の後継の通信方式であるＬＴＥ-Ａｄｖａｎｃｅｄ方式の移動通信システムでは、移動局ＵＥと無線基地局ＤｅＮＢ（Ｄｏｎｏｒ　ｅＮＢ）との間に、無線基地局ＤｅＮＢと同様な機能を具備する「リレーノード（Ｒｅｌａｙ　Ｎｏｄｅ）ＲＮ」を接続することができる。 In an LTE-Advanced mobile communication system, which is a successor of LTE (Long Term Evolution), a function similar to that of the radio base station DeNB is provided between the mobile station UE and the radio base station DeNB (Donor eNB). It can be connected to a “Relay Node RN”.
　かかるＬＴＥ-Ａｄｖａｎｃｅｄ方式の移動通信システムでは、移動局ＵＥとコアノードＣＮ（Ｃｏｒｅ　Ｎｏｄｅ）との間で、Ｅ-ＲＡＢ（Ｅ-ＵＴＲＡＮ　Ｒａｄｉｏ　Ａｃｃｅｓｓ　Ｂｅａｒｅｒ）が設定され、移動局ＵＥとリレーノードＲＮとの間で、Ｕｕ無線ベアラが設定され、リレーノードＲＮと無線基地局ＤｅＮＢとの間で、Ｕｎ無線ベアラが設定され、無線基地局ＤｅＮＢとコアノードＣＮとの間で、Ｓ１ベアラが設定されるように構成されている。 In such an LTE-Advanced mobile communication system, an E-RAB (E-UTRAN Radio Access Bearer) is set between the mobile station UE and the core node CN (Core Node), and the mobile station UE and the relay node RN are connected. Between the relay node RN and the radio base station DeNB, the Un radio bearer is set, and the S1 bearer is set between the radio base station DeNB and the core node CN. It is configured.
　しかしながら、かかる移動通信システムにおいて、リレーノードＲＮと無線基地局ＤｅＮＢとの間で同期が取れていないと、リレーノードＲＮによる無線基地局ＤｅＮＢからの下り信号の受信処理（Ｕｎ無線ベアラにおける受信処理）とリレーノードＲＮによる移動局ＵＥへの下り信号の送信処理（Ｕｕ無線ベアラにおける送信処理）との衝突や、リレーノードＲＮによる移動局ＵＥからの上り信号の受信処理（Ｕｕ無線ベアラにおける受信処理）とリレーノードＲＮによる無線基地局ＤｅＮＢへの上り信号の送信処理（Ｕｎ無線ベアラにおける送信処理）との衝突を回避することが困難になり、リレーノードＲＮの送信信号がＲＮ自身の受信機に回り込み、干渉が発生してしまう可能性が高くなるという問題点があった。 However, in such a mobile communication system, if synchronization is not established between the relay node RN and the radio base station DeNB, the relay node RN receives a downlink signal from the radio base station DeNB (reception process in the Un radio bearer). Between the mobile node UE and the relay node RN to the downlink signal transmission process (transmission process in the Uu radio bearer), or the relay node RN receives the uplink signal from the mobile station UE (reception process in the Uu radio bearer) It is difficult to avoid collision between the relay node RN and the uplink signal transmission process to the radio base station DeNB (transmission process in the Un radio bearer), and the transmission signal of the relay node RN wraps around the receiver of the RN itself There is a problem that the possibility that interference will occur increases.
　そこで、本発明は、上述の課題に鑑みてなされたものであり、Ｕｎ無線ベアラにおける送受信処理とＵｕ無線ベアラにおける送受信処理との衝突から引き起こされるリレーノード自身の受信機への干渉を低減することができる移動通信方法、無線基地局及びリレーノードを提供することを目的とする。 Therefore, the present invention has been made in view of the above-described problems, and reduces interference to the receiver of the relay node itself caused by collision between transmission / reception processing in the Un radio bearer and transmission / reception processing in the Uu radio bearer. An object of the present invention is to provide a mobile communication method, a radio base station, and a relay node that can perform communication.
　本発明の第１の特徴は、移動通信方法であって、リレーノードが、無線基地局によって送信されている報知情報に基づいて、該無線基地局との間の同期処理を行う工程Ａと、前記リレーノードが、前記無線基地局との間でコネクションを設定する際に、該無線基地局に対して、前記同期処理の結果を通知する工程Ｂとを有することを要旨とする。 A first feature of the present invention is a mobile communication method, in which a relay node performs a synchronization process with a radio base station based on broadcast information transmitted by the radio base station; When the relay node establishes a connection with the radio base station, the relay node includes a step B of notifying the radio base station of the result of the synchronization process.
　本発明の第２の特徴は、無線基地局であって、リレーノードとの間でコネクションを設定する際に、該リレーノードによって行われた前記無線基地局との間の同期処理の結果を取得するように構成されている取得部と、前記同期処理の結果が失敗である場合、前記リレーノードに対して、前記同期処理を行うように要求するように構成されている同期処理要求部とを具備することを要旨とする。 The second feature of the present invention is a radio base station, and when establishing a connection with a relay node, obtains a result of synchronization processing with the radio base station performed by the relay node. An acquisition unit configured to perform a synchronization processing request unit configured to request the relay node to perform the synchronization processing when the result of the synchronization processing is unsuccessful; The gist is to provide.
　本発明の第３の特徴は、リレーノードであって、無線基地局によって送信されている報知情報に基づいて、該無線基地局との間の同期処理を行うように構成されている同期処理部と、前記無線基地局との間でコネクションを設定する際に、前記無線基地局に対して、前記同期処理の結果を通知するように構成されている通知部とを具備することを要旨とする。 A third feature of the present invention is a relay node, which is configured to perform synchronization processing with a radio base station based on broadcast information transmitted by the radio base station. And a notification unit configured to notify the result of the synchronization processing to the radio base station when setting up a connection with the radio base station. .
　本発明の第４の特徴は、移動通信方法であって、リレーノードが、無線基地局によって送信されている報知情報に基づいて、該リレーノードと該無線基地局との間の無線フレームの先頭位置のずれを測定する工程Ａと、前記リレーノードが、前記無線基地局との間でコネクションを設定する際に、該無線基地局に対して、前記無線フレームの先頭位置のずれを通知する工程Ｂとを有することを要旨とする。 A fourth feature of the present invention is a mobile communication method, in which a relay node starts a radio frame between the relay node and the radio base station based on broadcast information transmitted by the radio base station. A step A of measuring a positional deviation, and a step of notifying the radio base station of a deviation of the start position of the radio frame when the relay node establishes a connection with the radio base station. And B.
　本発明の第５の特徴は、リレーノードであって、無線基地局によって送信されている報知情報に基づいて、前記リレーノードと該無線基地局との間の無線フレームの先頭位置のずれを測定するように構成されている同期処理部と、前記無線基地局との間でコネクションを設定する際に、前記無線基地局に対して、前記無線フレームの先頭位置のずれを通知するように構成されている通知部とを具備することを要旨とする。 A fifth feature of the present invention is a relay node, which measures a deviation of a start position of a radio frame between the relay node and the radio base station based on broadcast information transmitted by the radio base station. When establishing a connection between the synchronization processing unit configured to do so and the radio base station, the radio base station is configured to notify the radio base station of the deviation of the start position of the radio frame. The notification section is provided.
　以上説明したように、本発明によれば、Ｕｎ無線ベアラにおける送受信処理とＵｕ無線ベアラにおける送受信処理との衝突から引き起こされるリレーノード自身の受信機への干渉を低減することができる移動通信方法、無線基地局及びリレーノードを提供することができる。 As described above, according to the present invention, a mobile communication method capable of reducing interference to the receiver of the relay node itself caused by collision between transmission / reception processing in the Un radio bearer and transmission / reception processing in the Uu radio bearer, A radio base station and a relay node can be provided.
図１は、本発明の第１の実施形態に係る移動通信システムの全体構成図である。FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. 図２は、本発明の第１の実施形態に係るリレーノードの機能ブロック図である。FIG. 2 is a functional block diagram of the relay node according to the first embodiment of the present invention. 図３は、本発明の第１の実施形態に係る移動通信システムにおける「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」のフォーマットの一例を示す図である。FIG. 3 is a diagram illustrating an example of a format of “RRC Connection Reconfiguration Complete” in the mobile communication system according to the first embodiment of the present invention. 図４は、本発明の第１の実施形態に係る無線基地局の機能ブロック図である。FIG. 4 is a functional block diagram of the radio base station according to the first embodiment of the present invention. 図５は、本発明の第１の実施形態に係る移動通信システムの動作を示すシーケンス図である。FIG. 5 is a sequence diagram showing operations of the mobile communication system according to the first embodiment of the present invention. 図６は、本発明の第１の実施形態の変更例１に係る移動通信システムの動作を示すシーケンス図である。FIG. 6 is a sequence diagram showing an operation of the mobile communication system according to the first modification of the first embodiment of the present invention. 図７は、本発明の第１の実施形態の変更例２に係る移動通信システムの動作を示すシーケンス図である。FIG. 7 is a sequence diagram showing an operation of the mobile communication system according to the second modification of the first embodiment of the present invention. 図８は、本発明の第１の実施形態の変更例３に係る移動通信システムの動作を示すシーケンス図である。FIG. 8 is a sequence diagram showing an operation of the mobile communication system according to the third modification of the first embodiment of the present invention. 図９は、本発明の第１の実施形態の変更例４に係る移動通信システムの動作を示すシーケンス図である。FIG. 9 is a sequence diagram illustrating an operation of the mobile communication system according to the fourth modification of the first embodiment of the present invention.
（本発明の第１の実施形態に係る移動通信システムの構成）
　図１乃至図４を参照して、本発明の第１の実施形態に係る移動通信システムの構成について説明する。 (Configuration of mobile communication system according to the first embodiment of the present invention)
The configuration of the mobile communication system according to the first embodiment of the present invention will be described with reference to FIGS.
　図１に示すように、本実施形態に係る移動通信システムは、ＬＴＥ-Ａｄｖａｎｃｅｄ方式の移動通信システムであって、コアネットワークノード内のコアノード（例えば、ゲートウェイ装置Ｓ-ＧＷや交換局ＭＭＥ等）や、無線基地局ＤｅＮＢや、リレーノードＲＮ等を具備している。 As shown in FIG. 1, the mobile communication system according to the present embodiment is an LTE-Advanced mobile communication system, and includes core nodes (for example, a gateway device S-GW and an exchange MME) in a core network node. , Radio base station DeNB, relay node RN and the like.
　ここで、図１の例では、無線基地局ＤｅＮＢと移動局ＵＥとの間には、Ｕｕ無線ベアラが設定されており、無線基地局ＤｅＮＢとリレーノードＲＮとの間には、Ｕｎ無線ベアラが設定されており、リレーノードＲＮと移動局ＵＥとの間には、Ｕｕ無線ベアラが設定されている。 Here, in the example of FIG. 1, a Uu radio bearer is set between the radio base station DeNB and the mobile station UE, and an Un radio bearer is set between the radio base station DeNB and the relay node RN. The Uu radio bearer is set between the relay node RN and the mobile station UE.
　また、本実施形態に係る移動通信システムでは、無線基地局ＤｅＮＢ及びリレーノードＲＮは、時分割多重方式で、上り信号及び下り信号を送信するように構成されている。 Moreover, in the mobile communication system according to the present embodiment, the radio base station DeNB and the relay node RN are configured to transmit an uplink signal and a downlink signal by a time division multiplexing method.
　図２に示すように、リレーノードＲＮは、受信部１１と、同期処理部１２と、送信部１３と、スケジューリング部１４とを具備している。 As shown in FIG. 2, the relay node RN includes a reception unit 11, a synchronization processing unit 12, a transmission unit 13, and a scheduling unit 14.
　受信部１１は、Ｕｎ無線ベアラを介して無線基地局ＤｅＮＢから送信された下り信号や、Ｕｕ無線ベアラを介して移動局ＵＥから送信された上り信号を受信するように構成されている。 The receiving unit 11 is configured to receive a downlink signal transmitted from the radio base station DeNB via the Un radio bearer and an uplink signal transmitted from the mobile station UE via the Uu radio bearer.
　また、受信部１１は、無線基地局ＤｅＮＢによって送信されている報知情報を受信し、かかる報知情報に含まれるＳＦＮ（Ｓｙｓｔｅｍ　Ｆｒａｍｅ　Ｎｕｍｂｅｒ）を取得するように構成されている。 Further, the receiving unit 11 is configured to receive broadcast information transmitted by the radio base station DeNB and acquire an SFN (System Frame Number) included in the broadcast information.
　また、受信部２１は、リレーノードＲＮと無線基地局ＤｅＮＢとの間でＲＲＣコネクションを設定する際や、リレーノードＲＮと無線基地局ＤｅＮＢとの間で設定されているＲＲＣコネクションの構成を変更する際に、無線基地局ＤｅＮＢから、ＭＢＳＦＮ（Ｍｕｌｔｉｃａｓｔ　Ｂｒｏａｄｃａｓｔ　Ｓｉｎｇｌｅ　Ｆｒｅｑｕｅｎｃｙ　Ｎｅｔｗｏｒｋ）サブフレームの送信タイミングを取得するように構成されていてもよい。 Further, the reception unit 21 changes the configuration of the RRC connection set between the relay node RN and the radio base station DeNB when setting the RRC connection between the relay node RN and the radio base station DeNB. At this time, the radio base station DeNB may be configured to acquire the transmission timing of an MBSFN (Multicast Broadcast Single Frequency Network) subframe.
　ここで、ＭＢＳＦＮサブフレームは、ＭＢＳＦＮ用通信で用いられるサブフレームである。なお、本明細書において、ＭＢＳＦＮサブフレームには、３ＧＰＰ会合において「Ｂｌａｎｋサブフレーム」と呼ばれている制御信号用ＯＦＤＭシンボルが送信されないように規定されているＭＢＳＦＮサブフレームも含まれるものとする。 Here, the MBSFN subframe is a subframe used in MBSFN communication. In this specification, the MBSFN subframe also includes an MBSFN subframe that is defined so as not to transmit a control signal OFDM symbol called a “Blank subframe” in a 3GPP meeting.
　同期処理部１２は、無線基地局ＤｅＮＢによって送信されている報知情報に基づいて、無線基地局ＤｅＮＢとの間の同期処理を行うように構成されている。 The synchronization processing unit 12 is configured to perform synchronization processing with the radio base station DeNB based on broadcast information transmitted by the radio base station DeNB.
　例えば、同期処理部１２は、無線基地局ＤｅＮＢによって送信されている報知情報やＭＢＳＦＮサブフレームの送信タイミングに基づいて、無線基地局ＤｅＮＢとの間のＳＦＮ同期処理を行うように構成されている。 For example, the synchronization processing unit 12 is configured to perform the SFN synchronization process with the radio base station DeNB based on the broadcast information transmitted by the radio base station DeNB and the transmission timing of the MBSFN subframe.
　なお、かかるＳＦＮ同期処理とは、リレーノードＲＮと無線基地局ＤｅＮＢとの間で、ＳＦＮによって特定される無線フレームの先頭を一致させる処理を意味する。 The SFN synchronization process means a process for matching the heads of radio frames specified by the SFN between the relay node RN and the radio base station DeNB.
　送信部１３は、Ｕｎ無線ベアラを介して無線基地局ＤｅＮＢに対して上り信号を送信し、Ｕｕ無線ベアラを介して移動局ＵＥに対して下り信号を送信するように構成されている。 The transmission unit 13 is configured to transmit an uplink signal to the radio base station DeNB via the Un radio bearer and to transmit a downlink signal to the mobile station UE via the Uu radio bearer.
　また、送信部１３は、リレーノードＲＮと無線基地局ＤｅＮＢとの間でＲＲＣコネクションを設定する際に、無線基地局ＤｅＮＢに対して、ＳＦＮ同期処理の結果を通知するように構成されている。 In addition, the transmission unit 13 is configured to notify the radio base station DeNB of the result of the SFN synchronization process when setting the RRC connection between the relay node RN and the radio base station DeNB.
　具体的には、送信部１３は、ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、無線基地局ＤｅＮＢに対して、ＳＦＮ同期処理の結果を通知するように構成されていてもよい。 Specifically, the transmission unit 13 may be configured to notify the radio base station DeNB of the result of the SFN synchronization process by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure. Good.
　例えば、図３に示すように、送信部１３は、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」内の情報要素「ｎｏｎｃｒｉｔｉｃａｌＥｘｔｅｎｓｉｏｎｓ」（Ｚ）に、かかるＳＦＮ同期処理の結果（成功/失敗）を設定してもよい。 For example, as illustrated in FIG. 3, the transmission unit 13 may set the result (success / failure) of the SFN synchronization process in the information element “noncriticalExtensions” (Z) in the “RRC Connection Reconfiguration Complete”.
　スケジューリング部１４は、リレーノードＲＮ配下の移動局ＵＥに係るスケジューリングを行うように構成されている。 The scheduling unit 14 is configured to perform scheduling related to the mobile station UE under the relay node RN.
　例えば、スケジューリング部１４は、ＭＢＳＦＮサブフレームの送信タイミング以外のタイミングで下り信号を送信するようにスケジューリングを行うように構成されていてもよい。 For example, the scheduling unit 14 may be configured to perform scheduling so as to transmit a downlink signal at a timing other than the transmission timing of the MBSFN subframe.
　図４に示すように、無線基地局ＤｅＮＢは、送信部２１と、受信部２２と、スケジューリング部２３とを具備している。 As illustrated in FIG. 4, the radio base station DeNB includes a transmission unit 21, a reception unit 22, and a scheduling unit 23.
　送信部２１は、Ｕｎ無線ベアラを介してリレーノードＲＮに対して下り信号を送信し、Ｕｕ無線ベアラを介して移動局ＵＥに対して下り信号を送信し、コアノードＣＮに対して上り信号を送信するように構成されている。 The transmission unit 21 transmits a downlink signal to the relay node RN via the Un radio bearer, transmits a downlink signal to the mobile station UE via the Uu radio bearer, and transmits an uplink signal to the core node CN. Is configured to do.
　また、送信部２１は、無線基地局ＤｅＮＢ配下のセルにおいて、上述のＳＦＮを含む報知情報を送信するように構成されている。 Further, the transmission unit 21 is configured to transmit the broadcast information including the above-described SFN in a cell under the radio base station DeNB.
　なお、送信部１２は、リレーノードＲＮに対して、上述のＭＢＳＦＮサブフレームの送信タイミングを通知するように構成されていてもよい。 In addition, the transmission unit 12 may be configured to notify the relay node RN of the transmission timing of the above MBSFN subframe.
　受信部２２は、Ｕｎ無線ベアラを介してリレーノードＲＮから送信された上り信号や、Ｕｕ無線ベアラを介して移動局ＵＥから送信された上り信号や、コアノードＣＮから送信された下り信号を受信するように構成されている。 The receiving unit 22 receives an uplink signal transmitted from the relay node RN via the Un radio bearer, an uplink signal transmitted from the mobile station UE via the Uu radio bearer, and a downlink signal transmitted from the core node CN. It is configured as follows.
　例えば、受信部２２は、無線基地局ＤｅＮＢとリレーノードＲＮとの間のＲＲＣコネクションの設定手順においてリレーノードＲＮから送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」を受信し、かかる「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」から、上述のＳＦＮ同期処理の結果を取得するように構成されていてもよい。 For example, the receiving unit 22 receives “RRC Connection Reconfiguration Complete” transmitted from the relay node RN in the procedure of setting the RRC connection between the radio base station DeNB and the relay node RN, and receives the “RRC Connection Reconfiguration Complete” from the “RRC Connection Reconfiguration Complete”. The result of the SFN synchronization process described above may be acquired.
　スケジューリング部２３は、無線基地局ＤｅＮＢ配下のリレーノードＲＮや移動局ＵＥに係るスケジューリングを行うように構成されている。 The scheduling unit 23 is configured to perform scheduling related to the relay node RN and the mobile station UE under the radio base station DeNB.
　具体的には、スケジューリング部２３は、ＭＢＳＦＮサブフレームの送信タイミングで下り信号を送信するようにスケジューリングを行うように構成されていてもよい。 Specifically, the scheduling unit 23 may be configured to perform scheduling so that a downlink signal is transmitted at the transmission timing of the MBSFN subframe.
（本発明の第１の実施形態に係る移動通信システムの動作）
　図５を参照して、本発明の第１の実施形態に係る移動通信システムの動作について説明する。 (Operation of the mobile communication system according to the first embodiment of the present invention)
With reference to FIG. 5, the operation of the mobile communication system according to the first embodiment of the present invention will be described.
　図５に示すように、ステップＳ１００１において、リレーノードＲＮは、起動時に、無線基地局ＤｅＮＢに対して、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｑｕｅｓｔ」を送信する。 As shown in FIG. 5, in step S1001, the relay node RN transmits “RRC Connection Request” to the radio base station DeNB at the time of activation.
　ステップＳ１００２において、無線基地局ＤｅＮＢは、リレーノードＲＮに対して、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｓｅｔｕｐ」を送信する。 In step S1002, the radio base station DeNB transmits “RRC Connection Setup” to the relay node RN.
　ステップＳ１００３において、リレーノードＲＮは、無線基地局ＤｅＮＢに対して、「Ａｔｔａｃｈ　Ｒｅｑｕｅｓｔ」を含む「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｓｅｔｕｐ　Ｃｏｍｐｌｅｔｅ」を送信する。 In step S1003, the relay node RN transmits “RRC Connection Setup Complete” including “Attach Request” to the radio base station DeNB.
　ステップＳ１００４において、無線基地局ＤｅＮＢは、コアノードＣＮに対して、「Ａｔｔａｃｈ　Ｒｅｑｕｅｓｔ」を含む「Ｉｎｉｔｉａｌ　ＵＥ　Ｍｅｓｓａｇｅ」を送信する。 In step S1004, the radio base station DeNB transmits “Initial UE Message” including “Attach Request” to the core node CN.
　ステップＳ１００５において、リレーノードＲＮとコアノードＣＮとの間で「Ａｕｔｈｅｎｔｉｃａｔｉｏｎ/Ｓｅｃｕｒｉｔｙ処理」が完了した後、ステップＳ１００６において、コアノードＣＮは、無線基地局ＤｅＮＢに対して、「Ａｔｔａｃｈ　Ａｃｃｅｐｔ」を含む「Ｉｎｉｔｉａｌ　Ｃｏｎｔｅｘｔ　Ｓｅｔｕｐ　Ｒｅｑｕｅｓｔ」を送信する。 In step S1005, after the “Authentication / Security process” is completed between the relay node RN and the core node CN, in step S1006, the core node CN sends the “Initial Context” including “Attach Accept” to the radio base station DeNB. Send “Setup Request”.
　ステップＳ１００７において、無線基地局ＤｅＮＢは、リレーノードＲＮに対して、「ＲＲＣ　ＲＮ（ＵＥ）　Ｃａｐａｂｉｌｉｔｙ　Ｅｎｑｕｉｒｙ」を送信する。 In step S1007, the radio base station DeNB transmits “RRC RN (UE) Capability Enquiry” to the relay node RN.
　ステップＳ１００８において、リレーノードＲＮは、無線基地局ＤｅＮＢに対して、「ＲＲＣ　ＲＮ（ＵＥ）　Ｃａｐａｂｉｌｉｔｙ　Ｉｎｆｏｒｍａｔｉｏｎ」を送信する。 In step S1008, the relay node RN transmits “RRC RN (UE) Capability Information” to the radio base station DeNB.
　ステップＳ１００９において、無線基地局ＤｅＮＢは、コアノードＣＮに対して、「（ＵＥ）　Ｃａｐａｂｉｌｉｔｙ　Ｉｎｆｏ　Ｉｎｄｉｃａｔｉｏｎ」を送信する。 In step S1009, the radio base station DeNB transmits “(UE) Capability Info Indication” to the core node CN.
　無線基地局ＤｅＮＢは、リレーノードＲＮに対して、ステップＳ１０１０において、「Ｓｅｃｕｒｉｔｙ　Ｍｏｄｅ　Ｃｏｍｍａｎｄ」を送信し、ステップＳ１０１１において、「Ａｔｔａｃｈ　Ａｃｃｅｐｔ」を含む「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」を送信する。 The radio base station DeNB transmits “Security Mode Command” to the relay node RN in Step S1010, and transmits “RRC Connection Reconfiguration” including “Attach Accept” in Step S1011.
　ここで、無線基地局ＤｅＮＢは、リレーノードＲＮに対して、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」によって、上述のＭＢＳＦＮサブフレームの送信タイミングを通知してもよい。 Here, the radio base station DeNB may notify the relay node RN of the transmission timing of the MBSFN subframe described above by “RRC Connection Reconfiguration”.
　リレーノードＲＮは、無線基地局ＤｅＮＢに対して、ステップＳ１０１２において、「Ｓｅｃｕｒｉｔｙ　Ｍｏｄｅ　Ｃｏｍｐｌｅｔｅ」を送信し、ステップＳ１０１３において、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」を送信する。 The relay node RN transmits “Security Mode Complete” to the radio base station DeNB in step S1012, and transmits “RRC Connection Reconfiguration Complete” in step S1013.
　ここで、リレーノードＲＮは、無線基地局ＤｅＮＢに対して、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、無線基地局ＤｅＮＢによって送信されている報知情報及びＭＢＳＦＮサブフレームの送信タイミングに基づいて行ったＳＦＮ同期処理の結果を通知する。 Here, the relay node RN performs SFN synchronization processing performed on the radio base station DeNB based on the broadcast information transmitted by the radio base station DeNB and the transmission timing of the MBSFN subframe by “RRC Connection Reconfiguration Complete”. Notify the result of.
　ステップＳ１０１４において、無線基地局ＤｅＮＢは、コアノードＣＮに対して、「Ｉｎｉｔｉａｌ　Ｃｏｎｔｅｘｔ　Ｓｅｔｕｐ　Ｒｅｓｐｏｎｓｅ」を送信する。 In step S1014, the radio base station DeNB transmits “Initial Context Setup Response” to the core node CN.
　ステップＳ１０１５において、リレーノードＲＮは、コアノードＣＮに対して、「Ａｔｔａｃｈ　Ｃｏｍｐｌｅｔｅ」を送信する。 In step S1015, the relay node RN transmits “Attach Complete” to the core node CN.
（本発明の第１の実施形態に係る移動通信システムの作用・効果）
　本発明の第１の実施形態に係る移動通信システムによれば、無線基地局ＤｅＮＢは、リレーノードＲＮと無線基地局ＤｅｎＢとの間でＳＦＮ同期が取られているか否かについて認識することができ、リレーノードＲＮにおけるリソースを制御することによって、リソースノードＲＮ内での干渉の発生を低減することができる。 (Operations and effects of the mobile communication system according to the first embodiment of the present invention)
According to the mobile communication system according to the first embodiment of the present invention, the radio base station DeNB can recognize whether or not SFN synchronization is established between the relay node RN and the radio base station DenB. By controlling resources in the relay node RN, it is possible to reduce the occurrence of interference in the resource node RN.
（変更例１）
　図６を参照して、本発明の第１の実施形態の変更例１に係る移動通信システムについて説明する。以下、本変更例１に係る移動通信システムについて、上述の本発明の第１の実施形態に係る移動通信システムとの相違点に着目して説明する。 (Modification 1)
With reference to FIG. 6, a mobile communication system according to Modification 1 of the first embodiment of the present invention will be described. Hereinafter, the mobile communication system according to the first modification will be described by focusing on differences from the above-described mobile communication system according to the first embodiment of the present invention.
　本変更例１に係る移動通信システムでは、リレーノードＲＮの送信部１３は、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」の代わりに、「Ｕｎ　Ｓｅｔｕｐ　Ｒｅｑｕｅｓｔ」によって、無線基地局ＤｅＮＢに対して、上述のＳＦＮ同期処理の結果を通知するように構成されていてもよい。 In the mobile communication system according to the first modification, the transmission unit 13 of the relay node RN performs the above-described SFN synchronization processing on the radio base station DeNB by “Un Setup Request” instead of “RRC Connection Reconfiguration Complete”. The result may be notified.
　なお、「Ｕｎ　Ｓｅｔｕｐ　Ｒｅｑｕｅｓｔ」は、既存のＲＲＣコネクションの設定手順には規定されておらず、無線基地局ＤｅＮＢとリレーノードＲＮとの間で新たに規定される手順で用いられる信号である。 The “Un Setup Request” is not defined in the existing RRC connection setting procedure, but is a signal used in a procedure newly defined between the radio base station DeNB and the relay node RN.
　また、無線基地局ＤｅＮＢの受信部２２は、上述の「Ｕｎ　Ｓｅｔｕｐ　Ｒｅｑｕｅｓｔ」から、リレーノードＲＮにおけるＳＦＮ同期処理の結果を取得するように構成されていてもよい。 Also, the reception unit 22 of the radio base station DeNB may be configured to acquire the result of the SFN synchronization process in the relay node RN from the “Un Setup Request” described above.
　以下、図６を参照して、本変更例１に係る移動通信システムの動作について説明する。 Hereinafter, the operation of the mobile communication system according to the first modification will be described with reference to FIG.
　図６に示すように、ステップＳ２００１乃至Ｓ２０１５の動作は、図５に示すステップＳ１００１乃至Ｓ１０１５の動作と同一である。ただし、ステップＳ２０１１において　リレーノードＲＮは、無線基地局ＤｅＮＢに対して、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、リレーノードＲＮにおけるＳＦＮ同期処理の結果を通知しない。 As shown in FIG. 6, the operations in steps S2001 to S2015 are the same as the operations in steps S1001 to S1015 shown in FIG. However, in step S2011, the relay node RN does not notify the radio base station DeNB of the result of the SFN synchronization process in the relay node RN by “RRC Connection Reconfiguration Complete”.
　ステップＳ２０１６において、リレーノードＲＮは、無線基地局ＤｅＮＢに対して、リレーノードＲＮと無線基地局ＤｅＮＢとの間のＵｎ無線ベアラを設定することを要求する「Ｕｎ　Ｓｅｔｕｐ　Ｒｅｑｕｅｓｔ」を送信する。 In step S2016, the relay node RN transmits “Un Setup Request” requesting the radio base station DeNB to set an Un radio bearer between the relay node RN and the radio base station DeNB.
　ここで、リレーノードＲＮは、無線基地局ＤｅＮＢに対して、「Ｕｎ　Ｓｅｔｕｐ　Ｒｅｑｕｅｓｔ」によって、リレーノードＲＮにおけるＳＦＮ同期処理の結果を通知する。 Here, the relay node RN notifies the radio base station DeNB of the result of the SFN synchronization process in the relay node RN by “Un Setup Request”.
　ステップＳ２０１７において、無線基地局ＤｅＮＢは、リレーノードＲＮに対して、「Ｕｎ　Ｓｅｔｕｐ　Ｒｅｓｐｏｎｓｅ」を送信する。 In step S2017, the radio base station DeNB transmits “Un Setup Response” to the relay node RN.
（変更例２）
　図７を参照して、本発明の第１の実施形態の変更例２に係る移動通信システムについて説明する。以下、本変更例２に係る移動通信システムについて、上述の本発明の第１の実施形態に係る移動通信システムとの相違点に着目して説明する。 (Modification 2)
With reference to FIG. 7, a mobile communication system according to Modification 2 of the first embodiment of the present invention will be described. Hereinafter, the mobile communication system according to the second modification will be described by focusing on differences from the above-described mobile communication system according to the first embodiment of the present invention.
　本変更例に係る移動通信システムでは、リレーノードＲＮの送信部１３は、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」の代わりに、「Ｕｎ　ＲＮ　Ｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｉｎｄｉｃａｔｉｏｎ」によって、無線基地局ＤｅＮＢに対して、上述のＳＦＮ同期処理の結果を通知するように構成されていてもよい。 In the mobile communication system according to this modification, the transmission unit 13 of the relay node RN performs the above-described SFN synchronization process on the radio base station DeNB by “Un RN Configuration Indication” instead of “RRC Connection Reconfiguration Complete”. The result may be notified.
　なお、「Ｕｎ　ＲＮ　Ｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｉｎｄｉｃａｔｉｏｎ」は、既存のＲＲＣコネクションの設定手順には規定されておらず、無線基地局ＤｅＮＢとリレーノードＲＮとの間で新たに規定される手順で用いられる信号である。 Note that “Un RN Configuration Indication” is not defined in the existing RRC connection setting procedure, but is a signal used in a procedure newly defined between the radio base station DeNB and the relay node RN.
　また、無線基地局ＤｅＮＢの受信部２２は、上述の「Ｕｎ　ＲＮ　Ｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｉｎｄｉｃａｔｉｏｎ」から、リレーノードＲＮにおけるＳＦＮ同期処理の結果を取得するように構成されていてもよい。 Also, the reception unit 22 of the radio base station DeNB may be configured to acquire the result of the SFN synchronization process in the relay node RN from the “Un RN Configuration Indication” described above.
　以下、図７を参照して、本変更例２に係る移動通信システムの動作について説明する。 Hereinafter, the operation of the mobile communication system according to the second modification will be described with reference to FIG.
　図７に示すように、ステップＳ３００１乃至Ｓ３０１５の動作は、図５に示すステップＳ１００１乃至Ｓ１０１５の動作と同一である。ただし、ステップＳ３０１１において　リレーノードＲＮは、無線基地局ＤｅＮＢに対して、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、リレーノードＲＮにおけるＳＦＮ同期処理の結果を通知しない。 As shown in FIG. 7, the operations in steps S3001 to S3015 are the same as the operations in steps S1001 to S1015 shown in FIG. However, in step S3011, the relay node RN does not notify the radio base station DeNB of the result of the SFN synchronization processing in the relay node RN by “RRC Connection Reconfiguration Complete”.
　ステップＳ３０１６において、リレーノードＲＮは、無線基地局ＤｅＮＢに対して、リレーノードＲＮと無線基地局ＤｅＮＢとの間の無線中継基地局としてのＵｎ無線ベアラの構成を通知する「Ｕｎ　ＲＮ　Ｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｉｎｄｉｃａｔｉｏｎ」を送信する。 In Step S3016, the relay node RN notifies the radio base station DeNB of “Un RN Configuration Indication” that notifies the configuration of the Un radio bearer as a radio relay base station between the relay node RN and the radio base station DeNB. Send.
　ここで、リレーノードＲＮは、無線基地局ＤｅＮＢに対して、「Ｕｎ　ＲＮ　Ｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｉｎｄｉｃａｔｉｏｎ」によって、リレーノードＲＮにおけるＳＦＮ同期処理の結果を通知する。 Here, the relay node RN notifies the radio base station DeNB of the result of the SFN synchronization process in the relay node RN by “Un RN Configuration Indication”.
（変更例３）
　図８を参照して、本発明の第１の実施形態の変更例３に係る移動通信システムについて説明する。以下、本変更例３に係る移動通信システムについて、上述の本発明の第１の実施形態に係る移動通信システムとの相違点に着目して説明する。 (Modification 3)
With reference to FIG. 8, a mobile communication system according to Modification 3 of the first embodiment of the present invention is described. Hereinafter, the mobile communication system according to the third modification will be described by focusing on differences from the above-described mobile communication system according to the first embodiment of the present invention.
　本変更例３に係る移動通信システムでは、無線基地局ＤｅＮＢの送信部２１は、リレーノードＲＮによるＳＦＮ同期処理の結果が失敗であることを検知した場合、リレーノードＲＮに対して、ＳＦＮ同期処理を行うように要求するように構成されている。 In the mobile communication system according to the third modification, when the transmission unit 21 of the radio base station DeNB detects that the result of the SFN synchronization process by the relay node RN is failure, the SFN synchronization process is performed on the relay node RN. Is configured to request to do.
　具体的には、送信部２１は、ＲＲＣコネクションの構成を変更するための信号、例えば、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」によって、ＳＦＮ同期処理を行うように要求するように構成されていてもよい。 Specifically, the transmission unit 21 may be configured to request to perform the SFN synchronization process by a signal for changing the configuration of the RRC connection, for example, “RRC Connection Reconfiguration”.
　図８を参照して、本変更例３に係る移動通信システムの動作について説明する。 The operation of the mobile communication system according to the third modification will be described with reference to FIG.
　図８に示すように、無線基地局ＤｅＮＢは、ステップＳ４００１において、所定トリガを検出すると、ステップＳ４００２において、リレーノードＲＮに対して、既に設定されているＲＲＣコネクションの構成を変更するための「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」を送信する。 As illustrated in FIG. 8, when the radio base station DeNB detects a predetermined trigger in step S4001, in step S4002, the radio base station DeNB selects “RRC for changing the configuration of the RRC connection that has already been set for the relay node RN. Send "Connection Reconfiguration".
　ここで、無線基地局ＤｅＮＢは、リレーノードＲＮに対して、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」によって、ＳＦＮ同期処理を行うように要求する。 Here, the radio base station DeNB requests the relay node RN to perform the SFN synchronization process by “RRC Connection Reconfiguration”.
　ステップＳ４００３において、リレーノードＲＮは、無線基地局ＤｅＮＢとの間のＳＦＮ同期処理を行い、無線基地局ＤｅＮＢに対して、かかるＳＦＮ同期処理の結果を含む「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」を送信する。 In step S4003, the relay node RN performs an SFN synchronization process with the radio base station DeNB, and transmits “RRC Connection Reconfiguration Complete” including the result of the SFN synchronization process to the radio base station DeNB.
（変更例４）
　図９を参照して、本発明の第１の実施形態の変更例４に係る移動通信システムについて説明する。以下、本変更例１に係る移動通信システムについて、上述の本発明の第１の実施形態に係る移動通信システムとの相違点に着目して説明する。 (Modification 4)
With reference to FIG. 9, a mobile communication system according to Modification 4 of the first embodiment of the present invention is described. Hereinafter, the mobile communication system according to the first modification will be described by focusing on differences from the above-described mobile communication system according to the first embodiment of the present invention.
　本変更例３に係る移動通信システムでは、無線基地局ＤｅＮＢの送信部２１は、リレーノードＲＮによるＳＦＮ同期処理の結果が失敗であることを検知した場合、リレーノードＲＮに対して、ＳＦＮ同期処理を行うように要求するように構成されている。 In the mobile communication system according to the third modification, when the transmission unit 21 of the radio base station DeNB detects that the result of the SFN synchronization process by the relay node RN is failure, the SFN synchronization process is performed on the relay node RN. Is configured to request to do.
　具体的には、送信部２１は、ＲＲＣコネクションの構成を変更するための信号、例えば、「Ｕｎ　ＲＮ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」によって、ＳＦＮ同期処理を行うように要求するように構成されていてもよい。 Specifically, the transmission unit 21 may be configured to request to perform the SFN synchronization process by a signal for changing the configuration of the RRC connection, for example, “Un RN Reconfiguration”.
　なお、「Ｕｎ　ＲＮ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」は、無線基地局ＤｅＮＢとリレーノードＲＮとの間で新たに規定される手順で用いられる信号である。 Note that “Un RN Reconfiguration” is a signal used in a procedure newly defined between the radio base station DeNB and the relay node RN.
　以下、図９を参照して、本変更例４に係る移動通信システムの動作について説明する。 Hereinafter, the operation of the mobile communication system according to the fourth modification will be described with reference to FIG.
　図９に示すように、無線基地局ＤｅＮＢは、ステップＳ５００１において、所定トリガを検出すると、ステップＳ５００２において、リレーノードＲＮに対して、既に設定されているＲＲＣコネクションの構成を変更するための「Ｕｎ　ＲＮ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」を送信する。 As illustrated in FIG. 9, when the radio base station DeNB detects a predetermined trigger in step S5001, in step S5002, the radio base station DeNB sets “Un” for changing the configuration of the RRC connection that has already been set for the relay node RN. RN Reconfiguration "is transmitted.
　ここで、無線基地局ＤｅＮＢは、リレーノードＲＮに対して、「Ｕｎ　ＲＮ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」によって、ＳＦＮ同期処理を行うように要求する。 Here, the radio base station DeNB requests the relay node RN to perform the SFN synchronization process by “Un RN Reconfiguration”.
　ステップＳ５００３において、リレーノードＲＮは、無線基地局ＤｅＮＢとの間のＳＦＮ同期処理を行い、無線基地局ＤｅＮＢに対して、かかるＳＦＮ同期処理の結果を含む「Ｕｎ　ＲＮ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」を送信する。 In step S5003, the relay node RN performs an SFN synchronization process with the radio base station DeNB, and transmits “Un RN Reconfiguration Complete” including a result of the SFN synchronization process to the radio base station DeNB.
　なお、「Ｕｎ　ＲＮ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」は、無線基地局ＤｅＮＢとリレーノードＲＮとの間で新たに規定される手順で用いられる信号である。 In addition, “Un RN Reconfiguration Complete” is a signal used in a procedure newly defined between the radio base station DeNB and the relay node RN.
（変更例５）
　以下、本発明の第１の実施形態の変更例５に係る移動通信システムについて、上述の本発明の第１の実施形態に係る移動通信システムとの相違点に着目して説明する。 (Modification 5)
Hereinafter, the mobile communication system according to the fifth modification of the first embodiment of the present invention will be described by focusing on differences from the above-described mobile communication system according to the first embodiment of the present invention.
　リレーノードＲＮの同期処理部１２は、無線基地局ＤｅＮＢによって送信されている報知情報に基づいて、無線基地局ＤｅＮＢとリレーノードＲＮとの間でＳＦＮ同期処理を行う代わりに、リレーノードＲＮが送信する無線フレームのＳＦＮと第２無線基地局Ｓ-ＤｅＮＢが送信する無線フレームのＳＦＮとが同時刻で何フレームずれているか（リレーノードＲＮと第２無線基地局Ｓ-ＤｅＮＢとの間のＳＦＮ（無線フレームの先頭位置）のずれ）について測定し、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」等を用いて、かかる測定結果について無線基地局ＤｅＮＢに対して通知するように構成されていてもよい。 Instead of performing SFN synchronization processing between the radio base station DeNB and the relay node RN based on the broadcast information transmitted by the radio base station DeNB, the synchronization processing unit 12 of the relay node RN transmits the relay node RN. The number of frames of the SFN of the radio frame to be transmitted and the SFN of the radio frame transmitted by the second radio base station S-DeNB at the same time (SFN between the relay node RN and the second radio base station S-DeNB ( It may be configured to measure a deviation of the start position (radio frame) of the radio frame and notify the radio base station DeNB of the measurement result using “RRC Connection Reconfiguration Complete” or the like.
　また、無線基地局ＤｅＮＢの受信部２２は、リレーノードＲＮによって送信された「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」から、リレーノードＲＮが送信する無線フレームのＳＦＮと第２無線基地局Ｓ-ＤｅＮＢが送信する無線フレームのＳＦＮとが同時刻で何フレームずれているか（リレーノードＲＮと第２無線基地局Ｓ-ＤｅＮＢとの間のＳＦＮのずれ）を取得するように構成されていてもよい。 In addition, the reception unit 22 of the radio base station DeNB transmits the SFN of the radio frame transmitted by the relay node RN and the radio transmitted by the second radio base station S-DeNB from the “RRC Connection Reconfiguration Complete” transmitted by the relay node RN. It may be configured to acquire how many frames are deviated from the SFN of the frame at the same time (SFN deviation between the relay node RN and the second radio base station S-DeNB).
　以上に述べた本実施形態の特徴は、以下のように表現されていてもよい。 The features of the present embodiment described above may be expressed as follows.
　本実施形態の第１の特徴は、移動通信方法であって、リレーノードＲＮが、無線基地局ＤｅＮＢによって送信されている報知情報に基づいて、無線基地局ＤｅＮＢとの間のＳＦＮ同期処理（同期処理）を行う工程Ａと、リレーノードＲＮが、無線基地局ＤｅＮＢとの間でＲＲＣコネクション（コネクション）を設定する際に、無線基地局ＤｅＮＢに対して、ＳＦＮ同期処理の結果を通知する工程Ｂとを有することを要旨とする。 A first feature of the present embodiment is a mobile communication method, in which a relay node RN performs SFN synchronization processing (synchronization) with a radio base station DeNB based on broadcast information transmitted by the radio base station DeNB. Step A for performing processing) and Step B for notifying the radio base station DeNB of the result of the SFN synchronization processing when the relay node RN sets up an RRC connection (connection) with the radio base station DeNB. It is summarized as having.
　本実施形態の第１の特徴において、工程Ｂにおいて、リレーノードＲＮは、ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、無線基地局ＤｅＮＢに対して、ＳＦＮ同期処理の結果を通知してもよい。 In the first feature of the present embodiment, in step B, the relay node RN transmits the result of the SFN synchronization process to the radio base station DeNB by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure. You may be notified.
　本実施形態の第１の特徴において、無線基地局ＤｅＮＢが、ＳＦＮ同期処理の結果が失敗である場合、リレーノードＲＮに対して、ＳＦＮ同期処理を行うように要求する工程Ｃを更に有してもよい。 In the first feature of the present embodiment, the radio base station DeNB further includes a step C for requesting the relay node RN to perform the SFN synchronization process when the result of the SFN synchronization process is unsuccessful. Also good.
　本実施形態の第１の特徴において、工程Ｃにおいて、無線基地局ＤｅＮＢは、ＲＲＣコネクションの構成を変更するための信号、例えば、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」によって、ＳＦＮ同期処理を行うように要求してもよい。 In the first feature of the present embodiment, in step C, the radio base station DeNB requests to perform the SFN synchronization process by a signal for changing the configuration of the RRC connection, for example, “RRC Connection Reconfiguration”. Also good.
　本実施形態の第２の特徴は、無線基地局ＤｅＮＢであって、リレーノードＲＮとの間でＲＲＣコネクションを設定する際に、リレーノードＲＮによって行われた無線基地局ＤｅＮＢとの間のＳＦＮ同期処理の結果を取得するように構成されている受信部２２と、ＳＦＮ同期処理の結果が失敗である場合、リレーノードＲＮに対して、ＳＦＮ同期処理を行うように要求するように構成されている送信部２１とを具備することを要旨とする。 The second feature of the present embodiment is the radio base station DeNB, which is the SFN synchronization with the radio base station DeNB performed by the relay node RN when setting up the RRC connection with the relay node RN. When the result of the SFN synchronization process is unsuccessful with the receiving unit 22 configured to acquire the processing result, the relay node RN is configured to request the SFN synchronization process to be performed. The gist is that the transmitter 21 is provided.
　本実施形態の第２の特徴において、受信部２２は、ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」から、ＳＦＮ同期処理の結果を取得するように構成されていてもよい。 In the second feature of the present embodiment, the receiving unit 22 may be configured to acquire the result of the SFN synchronization processing from “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure.
　本実施形態の第２の特徴において、送信部２１は、ＲＲＣコネクションの構成を変更するための信号、例えば、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」によって、ＳＦＮ同期処理を行うように要求するように構成されていてもよい。 In the second feature of the present embodiment, the transmission unit 21 is configured to request to perform the SFN synchronization process by a signal for changing the configuration of the RRC connection, for example, “RRC Connection Reconfiguration”. Also good.
　本実施形態の第３の特徴は、リレーノードＲＮであって、無線基地局ＤｅＮＢによって送信されている報知情報に基づいて、無線基地局ＤｅＮＢとの間のＳＦＮ同期処理を行うように構成されている同期処理部１２と、無線基地局ＤｅＮＢとの間でＲＲＣコネクションを設定する際に、無線基地局ＤｅＮＢに対して、ＳＦＮ同期処理の結果を通知するように構成されている送信部１３とを具備することを要旨とする。 A third feature of the present embodiment is a relay node RN, which is configured to perform SFN synchronization processing with the radio base station DeNB based on broadcast information transmitted by the radio base station DeNB. When the RRC connection is established between the synchronization processing unit 12 and the radio base station DeNB, the transmission unit 13 configured to notify the radio base station DeNB of the result of the SFN synchronization process. The gist is to provide.
　本実施形態の第３の特徴において、送信部１３は、ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、無線基地局ＤｅＮＢに対して、ＳＦＮ同期処理の結果を通知するように構成されていてもよい。 In the third feature of the present embodiment, the transmission unit 13 notifies the radio base station DeNB of the result of the SFN synchronization process by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure. It may be configured.
　本実施形態の第４の特徴は、移動通信方法であって、リレーノードＲＮが、無線基地局ＤｅＮＢによって送信されている報知情報に基づいて、リレーノードＲＮと無線基地局ＤｅＮＢとの間のＳＦＮのずれ（リレーノードＲＮと無線基地局ＤｅＮＢとの間の無線フレームの先頭位置のずれ）を測定する工程Ａと、リレーノードＲＮが、無線基地局ＤｅＮＢとの間でＲＲＣコネクションを設定する際に、無線基地局ＤｅＮＢに対して、上述のＳＦＮのずれを通知する工程Ｂとを有することを要旨とする。 A fourth feature of the present embodiment is a mobile communication method, in which the relay node RN is based on broadcast information transmitted by the radio base station DeNB, and the SFN between the relay node RN and the radio base station DeNB. When the relay node RN sets up the RRC connection with the radio base station DeNB, the process A for measuring the difference between the relay node RN and the radio base station DeNB (step A). And a step B of notifying the radio base station DeNB of the deviation of the SFN described above.
　本実施形態の第４の特徴において、工程Ｂにおいて、リレーノードＲＮは、ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、無線基地局ＤｅＮＢに対して、上述のＳＦＮのずれを通知してもよい。 In the fourth feature of the present embodiment, in step B, the relay node RN causes the above-described SFN shift to the radio base station DeNB by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setup procedure. You may be notified.
　本実施形態の第５の特徴は、リレーノードＲＮであって、無線基地局ＤｅＮＢによって送信されている報知情報に基づいて、上述のＳＦＮのずれを測定するように構成されている同期処理部１２と、無線基地局ＤｅＮＢとの間でＲＲＣコネクションを設定する際に、無線基地局ＤｅＮＢに対して、上述のＳＦＮのずれを通知するように構成されている送信部１３とを具備することを要旨とする。 A fifth feature of the present embodiment is a relay node RN, which is configured to measure the above-described SFN deviation based on broadcast information transmitted by the radio base station DeNB. And a transmission unit 13 configured to notify the radio base station DeNB of the above-described SFN deviation when setting up an RRC connection with the radio base station DeNB. And
　本実施形態の第５の特徴において、送信部１３は、ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、無線基地局ＤｅＮＢに対して、上述のＳＦＮのずれを通知するように構成されていてもよい。 In the fifth feature of the present embodiment, the transmission unit 13 notifies the radio base station DeNB of the above-described SFN deviation by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure. It may be configured.
　なお、上述の無線基地局ＤｅＮＢやリレーノードＲＮやコアノードＣＮや移動局ＵＥの動作は、ハードウェアによって実施されてもよいし、プロセッサによって実行されるソフトウェアモジュールによって実施されてもよいし、両者の組み合わせによって実施されてもよい。 The operations of the radio base station DeNB, the relay node RN, the core node CN, and the mobile station UE described above may be implemented by hardware, may be implemented by a software module executed by a processor, It may be implemented by a combination.
　ソフトウェアモジュールは、ＲＡＭ（Ｒａｎｄｏｍ　Ａｃｃｅｓｓ　Ｍｅｍｏｒｙ）や、フラッシュメモリや、ＲＯＭ（Ｒｅａｄ　Ｏｎｌｙ　Ｍｅｍｏｒｙ）や、ＥＰＲＯＭ（Ｅｒａｓａｂｌｅ　Ｐｒｏｇｒａｍｍａｂｌｅ　ＲＯＭ）や、ＥＥＰＲＯＭ（Ｅｌｅｃｔｒｏｎｉｃａｌｌｙ　Ｅｒａｓａｂｌｅ　ａｎｄ　Ｐｒｏｇｒａｍｍａｂｌｅ　ＲＯＭ）や、レジスタや、ハードディスクや、リムーバブルディスクや、ＣＤ-ＲＯＭといった任意形式の記憶媒体内に設けられていてもよい。 Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in an arbitrary format storage medium such as a CD-ROM.
　かかる記憶媒体は、プロセッサが当該記憶媒体に情報を読み書きできるように、当該プロセッサに接続されている。また、かかる記憶媒体は、プロセッサに集積されていてもよい。また、かかる記憶媒体及びプロセッサは、ＡＳＩＣ内に設けられていてもよい。かかるＡＳＩＣは、無線基地局ＤｅＮＢやリレーノードＲＮやコアノードＣＮや移動局ＵＥ内に設けられていてもよい。また、かかる記憶媒体及びプロセッサは、ディスクリートコンポーネントとして無線基地局ＤｅＮＢやリレーノードＲＮやコアノードＣＮや移動局ＵＥ内に設けられていてもよい。 The storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station DeNB, the relay node RN, the core node CN, or the mobile station UE. Further, the storage medium and the processor may be provided in the radio base station DeNB, the relay node RN, the core node CN, and the mobile station UE as discrete components.
　以上、上述の実施形態を用いて本発明について詳細に説明したが、当業者にとっては、本発明が本明細書中に説明した実施形態に限定されるものではないということは明らかである。本発明は、特許請求の範囲の記載により定まる本発明の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。従って、本明細書の記載は、例示説明を目的とするものであり、本発明に対して何ら制限的な意味を有するものではない。 As described above, the present invention has been described in detail using the above-described embodiments. However, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

Claims (15)

  1. 　リレーノードが、無線基地局によって送信されている報知情報に基づいて、該無線基地局との間の同期処理を行う工程Ａと、
    　前記リレーノードが、前記無線基地局との間でコネクションを設定する際に、該無線基地局に対して、前記同期処理の結果を通知する工程Ｂとを有することを特徴とする移動通信方法。     Step A in which the relay node performs synchronization processing with the radio base station based on the broadcast information transmitted by the radio base station;
    A mobile communication method comprising: a step B of notifying a result of the synchronization processing to the radio base station when the relay node establishes a connection with the radio base station.
  2. 　前記コネクションは、ＲＲＣコネクションであり、
    　前記工程Ｂにおいて、前記リレーノードは、前記ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、前記無線基地局に対して、前記同期処理の結果を通知することを特徴とする請求項１に記載の移動通信方法。     The connection is an RRC connection,
    In the step B, the relay node notifies the radio base station of the result of the synchronization process by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setup procedure. Item 2. The mobile communication method according to Item 1.
  3. 　前記無線基地局が、前記同期処理の結果が失敗である場合、前記リレーノードに対して、前記同期処理を行うように要求する工程Ｃを更に有することを特徴とする請求項１に記載の移動通信方法。 2. The movement according to claim 1, further comprising a step C of requesting the relay node to perform the synchronization processing when the result of the synchronization processing is a failure. Communication method.
  4. 　前記工程Ｃにおいて、前記無線基地局は、前記コネクションの構成を変更するための信号によって、前記同期処理を行うように要求することを特徴とする請求項３に記載の移動通信方法。 4. The mobile communication method according to claim 3, wherein, in the step C, the radio base station requests to perform the synchronization process by a signal for changing the configuration of the connection.
  5. 　前記コネクションは、ＲＲＣコネクションであり、
    　前記信号は、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」であることを特徴とする請求項４に記載の移動通信方法。     The connection is an RRC connection,
    The mobile communication method according to claim 4, wherein the signal is "RRC Connection Reconfiguration".
  6. 　無線基地局であって、
    　リレーノードとの間でコネクションを設定する際に、該リレーノードによって行われた前記無線基地局との間の同期処理の結果を取得するように構成されている取得部と、
    　前記同期処理の結果が失敗である場合、前記リレーノードに対して、前記同期処理を行うように要求するように構成されている同期処理要求部とを具備することを特徴とする無線基地局。     A wireless base station,
    An acquisition unit configured to acquire a result of a synchronization process with the radio base station performed by the relay node when setting up a connection with the relay node;
    A radio base station, comprising: a synchronization processing request unit configured to request the relay node to perform the synchronization processing when a result of the synchronization processing fails.
  7. 　前記コネクションは、ＲＲＣコネクションであり、
    　前記取得部は、前記ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」から、前記同期処理の結果を取得するように構成されていることを特徴とする請求項６に記載の無線基地局。     The connection is an RRC connection,
    The radio base according to claim 6, wherein the acquisition unit is configured to acquire the result of the synchronization process from "RRC Connection Reconfiguration Complete" transmitted in the RRC connection setting procedure. Bureau.
  8. 　前記同期処理要求部は、前記コネクションの構成を変更するための信号によって、前記同期処理を行うように要求するように構成されていることを特徴とする請求項６に記載の無線基地局。 The radio base station according to claim 6, wherein the synchronization processing request unit is configured to request to perform the synchronization processing by a signal for changing the configuration of the connection.
  9. 　前記コネクションは、ＲＲＣコネクションであり、
    　前記信号は、「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」であることを特徴とする請求項８に記載の無線基地局。     The connection is an RRC connection,
    The radio base station according to claim 8, wherein the signal is “RRC Connection Reconfiguration”.
  10. 　リレーノードであって、
    　無線基地局によって送信されている報知情報に基づいて、該無線基地局との間の同期処理を行うように構成されている同期処理部と、
    　前記無線基地局との間でコネクションを設定する際に、前記無線基地局に対して、前記同期処理の結果を通知するように構成されている通知部とを具備することを特徴とするリレーノード。     A relay node,
    A synchronization processing unit configured to perform synchronization processing with the radio base station based on broadcast information transmitted by the radio base station;
    A relay node configured to notify the radio base station of the result of the synchronization process when setting up a connection with the radio base station; .
  11. 　前記コネクションは、ＲＲＣコネクションであり、
    　前記通知部は、前記ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、前記無線基地局に対して、前記同期処理の結果を通知するように構成されていることを特徴とする請求項１０に記載のリレーノード。     The connection is an RRC connection,
    The notification unit is configured to notify the radio base station of the result of the synchronization process by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setup procedure. The relay node according to claim 10.
  12. 　リレーノードが、無線基地局によって送信されている報知情報に基づいて、該リレーノードと該無線基地局との間の無線フレームの先頭位置のずれを測定する工程Ａと、
    　前記リレーノードが、前記無線基地局との間でコネクションを設定する際に、該無線基地局に対して、前記無線フレームの先頭位置のずれを通知する工程Ｂとを有することを特徴とする移動通信方法。     A step in which the relay node measures a deviation of a head position of a radio frame between the relay node and the radio base station based on broadcast information transmitted by the radio base station;
    The relay node comprises a step B of notifying a deviation of a start position of the radio frame to the radio base station when setting up a connection with the radio base station. Communication method.
  13. 　前記コネクションは、ＲＲＣコネクションであり、
    　前記工程Ｂにおいて、前記リレーノードは、前記ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、前記無線基地局に対して、前記無線フレームの先頭位置のずれを通知することを特徴とする請求項１２に記載の移動通信方法。     The connection is an RRC connection,
    In the step B, the relay node notifies the radio base station of the deviation of the start position of the radio frame by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setup procedure. The mobile communication method according to claim 12.
  14. 　リレーノードであって、
    　無線基地局によって送信されている報知情報に基づいて、前記リレーノードと該無線基地局との間の無線フレームの先頭位置のずれを測定するように構成されている同期処理部と、
    　前記無線基地局との間でコネクションを設定する際に、前記無線基地局に対して、前記無線フレームの先頭位置のずれを通知するように構成されている通知部とを具備することを特徴とするリレーノード。     A relay node,
    A synchronization processing unit configured to measure a deviation of a start position of a radio frame between the relay node and the radio base station based on broadcast information transmitted by the radio base station;
    A notification unit configured to notify the radio base station of a shift in the start position of the radio frame when setting up a connection with the radio base station; Relay node to perform.
  15. 　前記コネクションは、ＲＲＣコネクションであり、
    　前記通知部は、前記ＲＲＣコネクションの設定手順において送信される「ＲＲＣ　Ｃｏｎｎｅｃｔｉｏｎ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ　Ｃｏｍｐｌｅｔｅ」によって、前記無線基地局に対して、前記無線フレームの先頭位置のずれを通知するように構成されていることを特徴とする請求項１４に記載のリレーノード。     The connection is an RRC connection,
    The notifying unit is configured to notify the radio base station of the deviation of the start position of the radio frame by “RRC Connection Reconfiguration Complete” transmitted in the RRC connection setting procedure. The relay node according to claim 14, characterized in that:
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"Vodafone, Further consideration on L2 transparent relay", 3GPP TSG-RAN WG1 #56BIS, RL-091403, 23 March 2009 (2009-03-23), Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_56b/Docs/Rl-091403.zip> [retrieved on 20100914] *

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