WO2010131362A1 - Base station device, relay station device, mobile terminal, communication system, and control method thereof - Google Patents

Base station device, relay station device, mobile terminal, communication system, and control method thereof Download PDF

Info

Publication number
WO2010131362A1
WO2010131362A1 PCT/JP2009/059077 JP2009059077W WO2010131362A1 WO 2010131362 A1 WO2010131362 A1 WO 2010131362A1 JP 2009059077 W JP2009059077 W JP 2009059077W WO 2010131362 A1 WO2010131362 A1 WO 2010131362A1
Authority
WO
WIPO (PCT)
Prior art keywords
station apparatus
mobile terminal
data
relay station
subframe
Prior art date
Application number
PCT/JP2009/059077
Other languages
French (fr)
Japanese (ja)
Inventor
田中良紀
河▲崎▼義博
Original Assignee
富士通株式会社
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 富士通株式会社 filed Critical 富士通株式会社
Priority to PCT/JP2009/059077 priority Critical patent/WO2010131362A1/en
Priority to JP2011513197A priority patent/JP5201263B2/en
Publication of WO2010131362A1 publication Critical patent/WO2010131362A1/en

Links

Images

Classifications

    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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 base station device, a relay station device, a mobile terminal, a communication system, and a control method thereof.
  • a technique for performing communication between a base station and a mobile terminal via a relay station has been proposed.
  • transmission of backhaul data in a radio link (backhaul link) from a base station (eNB: evolved Node B) to a relay station (RN), and a relay station A method of performing data transmission on a radio link (access link) from a mobile terminal to a mobile terminal in a time-sharing manner (see Non-Patent Document 1).
  • an MBSFN Multicast / Broadcast Multimedia Services over a Frequency Network
  • the MBSFN subframe is a subframe originally used for transmission of a multicast / broadcast channel.
  • MBMS is not defined, so the Rel. 8 mobile terminal receives only a control channel such as PDCCH (Physical Downlink Control Channel) in the MBSFN subframe and PDSCH (Data Channel) (Physical Downlink Shared Shared Channel) is not received.
  • Non-Patent Document 1 in the MBSFN subframe, the relay station does not transmit a data channel such as PDSCH (Physical Downlink Shared ⁇ Channel) to the mobile terminal (UE: User Equipment). For this reason, it can suppress that the backhaul data from a base station to a relay station, and the data channel from a relay station to a mobile terminal interfere.
  • PDSCH Physical Downlink Shared ⁇ Channel
  • This base station apparatus, relay station apparatus, mobile terminal, communication system and control method thereof are intended to perform efficient data transmission to the mobile terminal.
  • a designated subframe that is a relay station device that relays communication between a base station device and a mobile terminal using a plurality of subframes and that does not multiplex data to the mobile terminal in the plurality of subframes
  • a relay station apparatus including a second transmission unit that transmits to a mobile terminal is used.
  • a base station apparatus that communicates with a mobile terminal via a mobile terminal and a relay station apparatus using a plurality of subframes, and transmits from the base station apparatus to one relay station apparatus among the relay station apparatuses
  • the subframe to which data to be transmitted is allocated and the subframe to which data to be transmitted from the base station apparatus to another relay station apparatus among the relay station apparatuses are allocated are transmitted to the relay station apparatus so as not to overlap in time.
  • a base station apparatus including a transmitting unit is used.
  • a base station apparatus that communicates with a mobile terminal via a mobile terminal and a relay station apparatus using a plurality of subframes, the data being transmitted to the relay station apparatus and the mobile terminal under the relay station apparatus
  • a base station apparatus including a transmitting unit that transmits subframes to which both data to be directly transmitted to the mobile station and the relay station apparatus are allocated is used.
  • a mobile terminal that uses a plurality of subframes and communicates with the base station apparatus via a base station apparatus and a relay station apparatus, and data to all the mobile terminals is not multiplexed in the plurality of subframes
  • a first receiving unit that receives designation information designating a designated subframe, which is a subframe, from the relay station apparatus, and allocation information indicating whether or not data for the mobile terminal is allocated in the designated subframe is added.
  • a second receiving unit for receiving the subframe data.
  • a communication system including a mobile terminal, a relay station apparatus, and a base station apparatus that communicates with the mobile terminal via the relay station apparatus using a plurality of subframes, wherein the plurality of subframes And a relay station device that transmits to the mobile terminal designation information that designates a designated subframe that is a subframe in which data to all the mobile terminals is not multiplexed, and data for the mobile terminal is allocated among the designated subframes. And a mobile terminal that receives subframe data to which assignment information indicating whether or not the information is attached is used.
  • a control method of a communication system including a mobile terminal, a relay station apparatus, and a base station apparatus that communicates with the mobile terminal via the relay station apparatus using a plurality of subframes, Transmitting to the mobile terminal designation information for designating a designated subframe that is a subframe in which data to all the mobile terminals is not multiplexed in the subframe, and the mobile terminal includes the mobile terminal in the designated subframe.
  • Receiving a subframe data to which allocation information indicating whether or not the target data is allocated is added, and using the communication system control method.
  • the base station apparatus According to the base station apparatus, relay station apparatus, mobile terminal, communication system, and control method thereof, efficient data transmission to the mobile terminal can be performed.
  • FIG. 1 is a diagram illustrating an example of a communication system in which the first embodiment is used.
  • FIG. 2 is a block diagram of the base station device, the relay station device, and the mobile terminal.
  • FIGS. 3A and 3B are diagrams illustrating a data frame structure used in the first embodiment.
  • FIG. 4 is a flowchart illustrating processing of the processing unit of the base station apparatus according to the first embodiment.
  • FIG. 5 is a flowchart illustrating processing of the processing unit of the relay station apparatus according to the first embodiment.
  • FIG. 6 is a flowchart illustrating processing of the processing unit of the mobile terminal according to the first embodiment.
  • FIG. 7A and FIG. 7B are diagrams illustrating a data frame structure according to the first embodiment.
  • FIG. 8E are diagrams illustrating a subframe structure.
  • FIG. 9 is a diagram illustrating an example of a communication system in which the second embodiment is used.
  • FIG. 10A to FIG. 10C are diagrams illustrating a data frame structure according to the second embodiment.
  • FIG. 11 is a diagram illustrating an example of a communication system in which the third embodiment is used.
  • FIG. 12 is a diagram illustrating a data frame structure according to the second embodiment.
  • FIG. 1 is a diagram illustrating an example of a communication system in which the first embodiment is used.
  • the communication system 100 includes a base station device 10, a relay station device 20, and a mobile terminal 30.
  • Base station apparatus 10 communicates with mobile terminal 30 via relay station apparatus 20. That is, the relay station device 20 relays communication between the mobile terminal 30 and the base station device 10. Further, the base station apparatus 10 communicates directly with the mobile terminal 30.
  • the base station device 10 can communicate with the mobile terminal 30 in a place where it cannot communicate directly with the mobile terminal 30 by communicating with the mobile terminal 30 via the relay station device 20.
  • FIG. 2 is a block diagram of the base station device 10, the relay station device 20, and the mobile terminal 30.
  • the base station apparatus 10 includes transmission / reception units 18 and 19, a processing unit 16, and a memory 17.
  • the transmission / reception unit 18 transmits data, designation information, and allocation information to the relay station device 20.
  • data is received from the relay station device 20.
  • the transmission / reception unit 18 can also transmit data, designation information, and allocation information directly to the mobile terminal 30.
  • data can be received directly from the mobile terminal 30.
  • the designation information and allocation information will be described later.
  • the transmission / reception unit 19 transmits / receives data and commands to / from the base station control device.
  • the processing unit 16 includes a first transmission unit 12 and a second transmission unit 14.
  • the first transmission unit 12 transmits the designation information to the mobile terminal 30 and the relay station device 20 via the transmission / reception unit 18.
  • the second transmission unit 14 transmits data and allocation information to the mobile terminal 30 and the relay station device 20 via the transmission / reception unit 18.
  • the memory 17 temporarily stores data, instruction information, and allocation information.
  • the relay station device 20 includes transmission / reception units 28 and 29, a processing unit 26, and a memory 27.
  • the transmission / reception unit 28 transmits data and allocation information to the mobile terminal 30. In addition, data is received from the mobile terminal 30.
  • the transmission / reception unit 29 receives data and instruction information from the base station apparatus 10. In addition, data is transmitted to the base station apparatus 10.
  • the processing unit 26 includes a reception unit 22, a first transmission unit 23, and a second transmission unit 24.
  • the receiving unit 22 receives data and designation information from the base station apparatus 10 via the transmission / reception unit 29.
  • the first transmission unit 23 transmits the designation information to the mobile terminal 30 via the transmission / reception unit 28.
  • the second transmission unit 24 transmits data and allocation information to the mobile terminal 30 via the transmission / reception unit 28.
  • the memory 27 temporarily stores data, instruction information, and allocation information.
  • the mobile terminal 30 includes a transmission / reception unit 38, a processing unit 36, and a memory 37.
  • the transmission / reception unit 38 receives data and instruction information from the relay station device 20. In addition, data is transmitted to the relay station device 20.
  • the transmission / reception unit 38 can directly receive data, instruction information, and allocation information from the base station apparatus 10. Furthermore, data can be directly transmitted to the base station apparatus 10.
  • the processing unit 36 includes a first receiving unit 32 and a second receiving unit 34.
  • the first reception unit 32 receives the designation information from the base station device 10 or the relay station device 20 via the transmission / reception unit 38.
  • the second reception unit 34 receives data and allocation information from the relay station device 20 or the base station device 10 via the transmission / reception unit 38.
  • the memory 27 temporarily stores data, instruction information, and allocation information.
  • FIG. 3A shows a frame structure of downlink (DL) data from the base station apparatus 10 to the relay station apparatus 20 or the mobile terminal 30.
  • FIG. 3B shows a frame structure of downlink (DL) data from the relay station device 20 to the mobile terminal 30.
  • the frame includes a plurality of subframes 40.
  • the subframe 40 includes a control channel 42 and a data channel 44.
  • the control channel 42 includes control channels such as PCFICH (Physical Control Hybrid Format Indicator Network), PHICH (Physical Hybrid ARQ Indicator Channel), and PDCCH (Physical Downlink Control Channel).
  • PCFICH includes CFI (Control Format Indicator).
  • data (UE data 50) for the mobile terminal 30 is multiplexed on the data channel 44 by PDSCH (Physical Downlink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • data channel 44 includes backhaul data (RN data 52).
  • the MBSFN subframe 40a (designated subframe) is used as a subframe transmitted through the access link at the same timing as the backhaul subframe in the backhaul link.
  • the mobile terminal 30 receives the control channel 42 regardless of whether the subframe 40 is the MBSFN subframe 40a or not. However, the release 8 mobile terminal 30 ignores the data channel 44 in the MBSFN subframe 40a.
  • the relay station device 20 does not receive the control channel 42 and determines whether or not to receive the data of the data channel 44 based on whether or not the data channel 44 is data directed to the own relay station device 20.
  • the MBSFN subframe (designated subframe) 40a is a subframe in which the release 8 mobile terminal 30 ignores the data in the subframe 40, and is a subframe in which data to all the mobile terminals 30 is not multiplexed. .
  • the base station apparatus 10 periodically transmits broadcast information to the relay station apparatus 20 and the mobile terminal 30.
  • the broadcast information includes information (designation information) that informs the position of the MBSFN subframe in the frame structure. Thereby, the relay station apparatus 20 and the mobile terminal 30 can recognize which subframe is an MBSFN subframe.
  • the base station apparatus 10 can transmit broadcast information to the relay station apparatus 20 and the mobile terminal 30 using any of the subframes 40.
  • the relay station device 20 periodically transmits notification information to the mobile terminal 30.
  • the broadcast information includes information (designation information) that informs the position of the MBSFN subframe in the frame structure. Thereby, the mobile terminal 30 can recognize which subframe is the MBSFN subframe. Further, the relay station apparatus 20 can also transmit the broadcast information to the subordinate mobile terminal 30 using any of the subframes 40.
  • the base station apparatus 10 assigns which subframe to which backhaul data for the relay station apparatus 20 is transmitted.
  • the result is transmitted to the relay station device 20.
  • the relay station apparatus 20 can recognize which subframe is directed to the own relay station apparatus 20.
  • the base station apparatus 10 can transmit backhaul subframe allocation information to the relay station apparatus 20 using any of the subframes 40.
  • the relay station device 20 uses the MBSFN subframe 40a (designated subframe) as a subframe to be transmitted through the access link at the same timing as the subframe in which the backhaul data destined for the local station is multiplexed.
  • the first subframe 40 is a subframe 40a for transmitting backhaul data, and is used for transmission of RN data 52 from the base station apparatus 10 to the relay station apparatus 20.
  • the 0th and 2nd to 9th subframes 40 are used for transmission of UE data 50 from the base station apparatus 10 to other mobile terminals 30.
  • the relay station apparatus 20 transmits a blank 54 in the MBSFN subframe 40a of the access link.
  • the 0th and 2nd to 9th subframes 40 are used for transmission of UE data 50 from the relay station apparatus 20 to the mobile terminal 30.
  • the UE data 50 is data transmitted from the base station apparatus 10 to the mobile terminal 30.
  • the RN data 52 is data transmitted from the base station device 10 to the relay station device 20.
  • the relay station device 20 since the relay station device 20 does not transmit data to the mobile terminal 30 in the subframe 40a in which the relay station device 20 receives data, interference between transmission and reception of the relay station device 20 can be suppressed. Further, the relay station apparatus 20 transmits the control channel 42 in the MBSFN subframe 40a of the access link, but does not receive the control channel 42 of the backhaul link. Thereby, also in the control channel 42, the interference between transmission / reception of the relay station apparatus 20 can be suppressed.
  • FIG. 4 is a flowchart illustrating processing of the processing unit of the base station apparatus according to the first embodiment.
  • the first transmission unit 12 of the base station apparatus 10 designates a designated subframe 40a (for example, corresponding to the MBSFN subframe in FIG. 3) among the plurality of subframes 40 (step S10).
  • the 1st transmission part 12 transmits the designation information which designates the designation
  • the broadcast information can be transmitted periodically, for example.
  • the processing unit 16 determines the allocation of subframes in which backhaul data is multiplexed to each relay station device 20 and transmits the determined allocation to each relay station device 20 (step S14).
  • the second transmission unit 14 performs the processing of steps S16 to S34 for each of the plurality of subframes 40.
  • the second transmission unit 14 determines whether the subframe is the designated subframe 40a based on the designation result in step S10 (step S16). In the case of No, the second transmission unit 14 uses the data channel 44 of the subframe 40 as the UE data 50 and the RN data 52, and transmits the subframe 40 to the mobile terminal 30 and the relay station device 20. Thereafter, the process proceeds to step S36.
  • the second transmission unit 14 sets the allocation information in the control channel 42 to No indicating that the data for the mobile terminal 30 is not allocated to the designated subframe 40a (step S22). For example, CFI ⁇ 3.
  • the second transmitter 14 transmits the RN data 52 as the data channel 44 to the relay station device 20 (step S24). Thereafter, the process proceeds to step S36.
  • the processing unit 16 determines whether the subframe 40 is the last subframe (step S36). If yes, end. In No, it is set as the next subframe and it progresses to step S16.
  • FIG. 5 is a flowchart illustrating processing of the processing unit of the relay station apparatus according to the first embodiment.
  • the receiving unit 22 of the processing unit 26 receives designation information that designates a designated subframe among the plurality of subframes 40 (step S40).
  • the receiving unit 22 receives the position information of the subframe 40a including the RN data for the own relay station device 20 (step S42).
  • the 1st transmission part 23 transmits designation
  • the broadcast information can be transmitted periodically, for example.
  • the designation information may be the same as the designation information received in step S40, but may be set uniquely by the relay station device 20 as will be described with reference to FIGS. 7 (a) and 7 (b).
  • the second transmission unit 24 performs the processing of steps S46 to S56 for each of the plurality of subframes 40.
  • the second transmission unit 24 determines whether the data channel 44 includes the RN data 52 for the relay station device 20 based on the position information received in step S42 (step S46). In No, the 2nd transmission part 24 sets the allocation information in the control channel 42 to Yes, when this sub-frame is a designation
  • designated sub-frame (step S54). For example, CFI 3.
  • the second transmitter 24 transmits the UE data 50 as the data channel 44 to the mobile terminal 30 (step S56). Thereafter, the process proceeds to step S58.
  • step S46 the second transmission unit 24 sets No to the allocation information in the control channel 42 when this subframe is a designated subframe (step S48). For example, CFI ⁇ 3.
  • the second transmitter 24 does not transmit the UE data 50 as the data channel 44 (step S50).
  • the data channel 44 is a blank 54. Thereafter, the process proceeds to step S36.
  • the processing unit 26 determines whether the subframe 40 is the last subframe (step S58). If yes, end. In No, it is set as the next subframe and it progresses to step S44.
  • FIG. 6 is a flowchart illustrating processing of the processing unit of the mobile terminal according to the first embodiment.
  • the first receiving unit 32 of the processing unit 36 receives the designation information for designating the designated subframe among the plurality of subframes 40 from the base station device 10 or the relay station device 20 (step S60). .
  • the second receiving unit 34 performs the processing of steps S62 to S72 for each of the plurality of subframes 40.
  • the second reception unit 34 determines whether the subframe is the designated subframe 40a based on the designation information (Step S62). In No, the 2nd receiving part 34 receives UE data 50 of the data channel 44 of the sub-frame 40 (step S70). Thereafter, the process proceeds to step S74.
  • step S62 the second reception unit 34 determines whether the allocation information included in the control channel 42 is Yes or No (step S64). That is, it is determined whether or not UE data to be read by the mobile terminal 30 is assigned to the data channel 44.
  • step S64 the 2nd receiving part 34 receives UE data 50 in the data channel 44 (step S72). Thereafter, the process proceeds to step S74.
  • step S64 the second receiving unit 34 ignores the data in the data channel 44 and does not receive it (step S66).
  • the processing unit 36 determines whether the subframe 40 is the last subframe (step S74). If yes, end. In No, it is set as the next subframe and it progresses to step S62.
  • FIG. 7A shows a frame structure of downlink (DL) data from the base station apparatus 10 to the relay station apparatus 20 or the mobile terminal 30 in the first embodiment.
  • FIG. 7B illustrates a frame structure of downlink (DL) data from the relay station apparatus 20 to the mobile terminal 30 in the first embodiment.
  • FIGS. 7 (a) and 7 (b) are diagrams showing the structures of the subframes 60 to 68 in FIGS. 7 (a) and 7 (b).
  • the control channel 42 is formed by two symbols.
  • the control channel 42 and the data channel 44 include a reference signal RS for synchronization.
  • the subframe 60 is not the MBSFN subframe 40a. Therefore, CFI ⁇ 3 and UE data 50 is assigned to the data channel 44.
  • the subframe 62 is the MBSFN subframe 40a.
  • RN data 52 is assigned to the data channel 44 and CFI ⁇ 3.
  • UE data 50 and RN data 52 are allocated to the data channel 44 of the subframe 66.
  • CFI 3.
  • the subframe 64 is the MBSFN subframe 40a.
  • Data channel 44 is blank 54 and CFI ⁇ 3.
  • the subframe 68 is the MBSFN subframe 40a.
  • the first and sixth subframes 40 in the transmission frame of the base station apparatus 10 are MBSFN subframes 40a. That is, MBSFNs 11 to 14 in FIG. 7A are MBSFN subframes 40a.
  • the base station apparatus 10 can set a subframe in which the UE data 50 to all the mobile terminals 30 is not multiplexed as the MBSFN subframe 40a. For this reason, the base station apparatus 10 does not need to use the MBSFN subframe 40a as the third subframe in which, for example, the UE data 50 and the RN data 52 are multiplexed.
  • the first, third, and sixth subframes 40 in the access link of the relay station apparatus 20 are MBSFN subframes 40a. That is, MBSFN 21 to 26 in FIG. 7B are MBSFN subframes 40a.
  • the base station apparatus 10 multiplexes the RN data 52 to the relay station apparatus 20 in the first and third subframes 40 and performs transmission.
  • the sixth subframe 40 is used for transmission of the RN data 52 to the other relay station apparatus 20.
  • the MBSFN subframe 40a set by the base station device 10 and the MBSFN subframe 40a set by the relay station device 20 may not be the same.
  • the base station device 10 transmits the RN data 52 addressed to the own relay station device 20. Therefore, the relay station apparatus 20 sets CFI ⁇ 3 (step S48 in FIG. 5), sets the data channel 44 to the blank 54, and transmits it to the mobile terminal 30 (step S50 in FIG. 5). Since CFI ⁇ 3, the mobile terminal 30 ignores the data channel (step S66 in FIG. 6).
  • the sixth subframe (MBSFN12, MBSFN14) includes UE data 50 from the base station apparatus 10 to the mobile terminal 30 and the relay station apparatus shown in FIG. 7B from the base station apparatus 10.
  • CFI 3 for the MBSFN subframe 40a transmitted from the base station apparatus 10
  • the mobile terminal 30 receives the UE data 50 of the data channel 44 (step S72 in FIG. 6).
  • CFI ⁇ 3 for the MBSFN subframe 40a transmitted from the relay station apparatus 20 the mobile terminal 30 does not receive the UE data 50 of the data channel 44 (step S66 in FIG. 6).
  • the base station apparatus 10 can transmit the UE data 50 as unicast data to each mobile terminal 30 even in the MBSFN subframe 40a as in the MBSFN 12 and the MBSFN 14 in FIG. Therefore, the throughput of UE data 50 transmission from the base station apparatus 10 to the mobile terminal 30 can be improved.
  • the second transmission unit 24 of the relay station device 20 includes the relay station device 20 on the backhaul link in the MBSFN subframe (designated subframe) 40a of the access link. Data is allocated to the subframe of the access link corresponding to the subframe not including the RN data to be received.
  • the second transmission unit 24 adds allocation information indicating whether or not UE data is allocated to the subframe 40 a to which data is allocated, and transmits it to the mobile terminal 30. Accordingly, the relay station apparatus 20 can transmit the UE data 50 to the mobile terminal 30 even in the MBSFN subframe 40a as in the MBSFN 23 and the MBSFN 26 in FIG. Therefore, the throughput of UE data 50 transmission from the relay station apparatus 20 to the mobile terminal 30 can be improved.
  • the second receiving unit 34 of the mobile terminal 30 confirms that the UE data for the mobile terminal is assigned to the allocation information in the MBSFN subframe (designated subframe) 40a.
  • the data of the indicated subframe is received.
  • the base station apparatus 10 or the relay station apparatus 20 is connected to the mobile terminal 30 even in the MBSFN subframe 40a as in the MBSFN 12 and MBSFN 14 in FIG. 7A and the MBSFN 23 and MBSFN 26 in FIG.
  • UE data 50 can be transmitted. Therefore, the throughput of transmitting the UE data 50 from the base station device 10 or the relay station device 20 to the mobile terminal 30 can be improved.
  • the second transmission unit 14 assigns data to subframes that do not include RN data in the MBSFN subframe (designated subframe) 40a and transmits the data directly to the mobile terminal 30.
  • the second transmission unit 14 includes a relay station device 20 corresponding to a base station device transmission subframe (for example, MBSFN 12 and 14 in FIG. 7A) that does not include data to be transmitted from the base station device 10 to the relay station device 20.
  • Data is allocated to a designated subframe (for example, MBSFN 23 and 26 in FIG. 7B).
  • the designated subframe to which the data is assigned is transmitted to the mobile terminal 30. Thereby, the base station apparatus 10 can transmit the UE data 50 to the mobile terminal 30 even in the MBSFN subframe 40a.
  • the second transmission unit 14 assigns and relays both RN data and UE data directly transmitted to the mobile terminal 30 to one of the MBSFN subframes (designated subframes) 40a. It transmits to the station apparatus 20 and the mobile terminal 30. Thereby, the base station apparatus 10 can transmit the UE data 50 to the mobile terminal 30 even in the MBSFN subframe 40a as in the MBSFN 12 and the MBSFN 14 in FIG.
  • Example 2 is an example in which data is cooperatively transmitted to the mobile terminal 30 using a plurality of relay station devices 20.
  • FIG. 9 is a diagram illustrating an example of a communication system in which the second embodiment is used.
  • the communication system 100 a includes a base station device 10, relay station devices 20 a and 20 b, and a mobile terminal 30.
  • Base station apparatus 10 communicates with mobile terminal 30 via relay station apparatuses 20a and 20b. Further, the base station apparatus 10 communicates directly with the mobile terminal 30.
  • the relay station device 20a and the relay station device 20b cooperatively transmit data to the mobile terminal 30.
  • the mobile terminal 30 can receive the data.
  • the processing of the processing unit 16 of the base station device 10, the processing unit 26 of the relay station devices 20a and 20b, and the processing unit 36 of the mobile terminal 30 in the second embodiment is the same as that shown in FIGS.
  • FIG. 10A shows a frame structure of downlink (DL) data from the base station apparatus 10 to the relay station apparatuses 20a and 20b or the mobile terminal 30 in the second embodiment.
  • FIG. 10B illustrates a frame structure of downlink (DL) data from the relay station apparatus 20a to the mobile terminal 30 in the second embodiment.
  • FIG. 10C illustrates a frame structure of downlink (DL) data from the relay station apparatus 20b to the mobile terminal 30 in the second embodiment.
  • MBSFN1 and MBSFN3 are MBSFN subframes to which the second transmitter 14 has assigned data to be transmitted from the base station device 10 to one relay station device 20a among the relay station devices.
  • MBSFN2 and MBSFN4 are MBSFN subframes to which data to be transmitted from the base station apparatus 10 to the other relay station apparatus 20b by the second transmission unit 14 is assigned. Note that the UE data 50 is also included in the subframe 66b.
  • the second transmission unit 14 transmits MBSFN1 and 3 (addressed to the relay station apparatus 20a from the base station apparatus 10 to one relay station apparatus among a plurality of relay station apparatuses). And MBSFN2 and 4 addressed to the relay station device 20b (subframes assigned data to be transmitted from the base station device 10 to one relay station device). Avoid overlapping in time. Thereby, when the base station apparatus 10 transmits the RN data 52 to the relay station apparatus 20a, the relay station apparatus 20b can transmit the UE data 50 to the mobile terminal 30.
  • the relay station apparatus 20a can transmit the UE data 50 to the mobile terminal 30. Therefore, the UE data 50 can be transmitted to the mobile terminal 30 with high throughput.
  • Embodiment 3 is an example in which data is cooperatively transmitted to the mobile terminal 30 using the relay station device 20 and the base station device 10.
  • FIG. 11 is a diagram illustrating an example of a communication system in which the third embodiment is used.
  • the communication system 100 b includes a base station device 10, a relay station device 20, and a mobile terminal 30.
  • the base station device 10 and the relay station device 20 cooperatively transmit data to the mobile terminal 30.
  • the processing of the processing unit 16 of the base station device 10, the processing unit 26 of the relay station devices 20a and 20b, and the processing unit 36 of the mobile terminal 30 in the second embodiment is the same as that shown in FIGS.
  • FIG. 12 illustrates a frame of downlink (DL) data from the base station apparatus 10 to the relay station apparatus 20 or the mobile terminal 30 and downlink (DL) data from the relay station apparatus 20a to the mobile terminal 30 in the third embodiment. The structure is shown.
  • DL downlink
  • base station apparatus 10 transmits RN data 52 to relay station apparatus 20, and directly transmits UE data 50 to mobile terminal 30 (step S34 in FIG. 4).
  • the relay station apparatus 20 sets the data channel 44 to the blank 54 (step S50 in FIG. 5). It is assumed that CFI ⁇ 3 (step S48 in FIG. 5).
  • the second transmission unit 14 of the base station device 10 assigns both the data 52 to be transmitted to the relay station device 20 and the data 50 to be directly transmitted by the mobile terminal 30 under the relay station device 20.
  • the subframes (MBSFN1 and 2 in FIG. 12) are transmitted to relay station apparatus 20 and mobile terminal 30.
  • the second transmission unit 14 assigns the UE data 50 and the RN data 52 to the MBSFN subframe 40a.
  • the base station apparatus 10 can transmit the UE data 50 to the mobile terminal 30 even in the subframe in which the RN data 52 is transmitted to the relay station apparatus 20. Therefore, the UE data 50 can be transmitted to the mobile terminal 30 with high throughput.
  • the MBSFN subframe has been described as an example of the designated subframe, but other subframes can be used. Further, although 3PGG has been described as an example, the first to third embodiments can be applied to other communication systems. Although an example in which CFI is used as the allocation information has been described, other information in the control channel 42 may be used. In addition to the control channel 42, designation information may be added.

Abstract

Provided is a relay station device (20) which relays communication using a plurality of subframes between a base station device (10) and a mobile terminal (30).  The relay station device (20) includes: a first transmission unit (23) which transmits to the mobile terminal, specification information for specifying a specific subframe on which data to the mobile terminal is not multiplexed among the subframes; and a second transmission unit (24) which adds allocation information indicating whether the data for the mobile terminal has been allocated to the specific subframe and transmits the specific subframe to the mobile terminal.

Description

基地局装置、リレー局装置、移動端末、通信システムおよびその制御方法Base station apparatus, relay station apparatus, mobile terminal, communication system and control method thereof
　本発明は、基地局装置、リレー局装置、移動端末、通信システムおよびその制御方法に関する。 The present invention relates to a base station device, a relay station device, a mobile terminal, a communication system, and a control method thereof.
　基地局と移動端末との間の通信をリレー局を介して行なう技術が提案されている。例えば、３ＧＰＰ（3rd Generation Partnership Project）のＬＴＥ－Ａｄｖａｎｃｅｄ標準化において、基地局（ｅＮＢ:evolved Node B）からリレー局（ＲＮ）への無線リンク（バックホールリンク）におけるバックホールデータの送信と、リレー局から移動端末への無線リンク（アクセスリンク）におけるデータ送信を時分割で行う方法が検討されている（非特許文献１参照）。 A technique for performing communication between a base station and a mobile terminal via a relay station has been proposed. For example, in LTE-Advanced standardization of 3GPP (3rd Generation Generation Partnership Project), transmission of backhaul data in a radio link (backhaul link) from a base station (eNB: evolved Node B) to a relay station (RN), and a relay station A method of performing data transmission on a radio link (access link) from a mobile terminal to a mobile terminal in a time-sharing manner (see Non-Patent Document 1).
　このとき、バックホールデータを送信するサブフレームと同じタイミングで送信するアクセスリンクのサブフレームとして、ＭＢＳＦＮ（Multicast/Broadcast Multimedia Services over a Single Frequency Network）サブフレームを用い行うことが検討されている。ＭＢＳＦＮサブフレームは、本来マルチキャスト／ブロードキャストチャネルの送信に用いるサブフレームである。LTE リリース８(Rel.8)ではＭＢＭＳが規定されていないため、Rel.8移動端末はＭＢＳＦＮサブフレームでは、ＰＤＣＣＨ（Physical Downlink Control Channel）等の制御チャネルのみを受信し、データチャネルであるＰＤＳＣＨ（Physical Downlink Shared Channel）の受信は行わない。したがって非特許文献１に示されているように、ＭＢＳＦＮサブフレームでは、リレー局は移動端末（ＵＥ：User Equipment）に対しＰＤＳＣＨ（Physical Downlink Shared Channel）等のデータチャネルを送信しない。このため、基地局からリレー局へのバックホールデータと、リレー局から移動端末へのデータチャネルとが干渉することを抑制できる。 At this time, it is considered to use an MBSFN (Multicast / Broadcast Multimedia Services over a Frequency Network) subframe as an access link subframe to be transmitted at the same timing as the subframe for transmitting backhaul data. The MBSFN subframe is a subframe originally used for transmission of a multicast / broadcast channel. In LTE Release 8 (Rel. 8), MBMS is not defined, so the Rel. 8 mobile terminal receives only a control channel such as PDCCH (Physical Downlink Control Channel) in the MBSFN subframe and PDSCH (Data Channel) (Physical Downlink Shared Shared Channel) is not received. Therefore, as shown in Non-Patent Document 1, in the MBSFN subframe, the relay station does not transmit a data channel such as PDSCH (Physical Downlink Shared 移動 Channel) to the mobile terminal (UE: User Equipment). For this reason, it can suppress that the backhaul data from a base station to a relay station, and the data channel from a relay station to a mobile terminal interfere.
　しかしながら、上記技術によれば、例えばアクセスリンクでＭＢＳＦＮサブフレームを用いた場合、リレー局は移動端末にデータを送信できないため、移動端末への効率よいデータ送信ができないという課題がある。 However, according to the above technique, for example, when the MBSFN subframe is used in the access link, there is a problem that the relay station cannot transmit data to the mobile terminal and thus cannot efficiently transmit data to the mobile terminal.
　本基地局装置、リレー局装置、移動端末、通信システムおよびその制御方法は、移動端末への効率よいデータ送信を行なうことを目的とする。 This base station apparatus, relay station apparatus, mobile terminal, communication system and control method thereof are intended to perform efficient data transmission to the mobile terminal.
　例えば、複数のサブフレームを用いた基地局装置と移動端末との通信を中継するリレー局装置であって、前記複数のサブフレームにおいて前記移動端末へのデータを多重しないサブフレームである指定サブフレームを指定する指定情報を前記移動端末に送信する第１送信部と、前記指定サブフレームに前記移動端末向けのデータが割り当てられているか否かを示す割当情報を付加し、前記指定サブフレームを前記移動端末に送信する第２送信部と、を具備するリレー局装置を用いる。 For example, a designated subframe that is a relay station device that relays communication between a base station device and a mobile terminal using a plurality of subframes and that does not multiplex data to the mobile terminal in the plurality of subframes A first transmission unit for transmitting designation information designating to the mobile terminal, and allocation information indicating whether data for the mobile terminal is allocated to the designated subframe, and adding the designated subframe to the designated subframe. A relay station apparatus including a second transmission unit that transmits to a mobile terminal is used.
　また、例えば、複数のサブフレームを用い、移動端末およびリレー局装置を介し移動端末と通信を行なう基地局装置であって、前記基地局装置から前記リレー局装置のうち１つのリレー局装置へ送信するデータを割り当てたサブフレームと、前記基地局装置から前記リレー局装置のうち他のリレー局装置に送信するデータを割り当てたサブフレームと、を時間的に重ならないように前記リレー局装置に送信する送信部を具備する基地局装置を用いる。 Further, for example, a base station apparatus that communicates with a mobile terminal via a mobile terminal and a relay station apparatus using a plurality of subframes, and transmits from the base station apparatus to one relay station apparatus among the relay station apparatuses The subframe to which data to be transmitted is allocated and the subframe to which data to be transmitted from the base station apparatus to another relay station apparatus among the relay station apparatuses are allocated are transmitted to the relay station apparatus so as not to overlap in time. A base station apparatus including a transmitting unit is used.
　また、例えば、複数のサブフレームを用い、移動端末およびリレー局装置を介し移動端末と通信を行なう基地局装置であって、前記リレー局装置に送信するデータと前記リレー局装置配下の前記移動端末に直接送信するデータとの両方を割り当てたサブフレームを前記リレー局装置および前記移動端末に送信する送信部を具備する基地局装置を用いる。 In addition, for example, a base station apparatus that communicates with a mobile terminal via a mobile terminal and a relay station apparatus using a plurality of subframes, the data being transmitted to the relay station apparatus and the mobile terminal under the relay station apparatus A base station apparatus including a transmitting unit that transmits subframes to which both data to be directly transmitted to the mobile station and the relay station apparatus are allocated is used.
　また、例えば、複数のサブフレームを用い、基地局装置およびリレー局装置を介し基地局装置と通信を行なう移動端末であって、前記複数のサブフレームにおいて全ての前記移動端末へのデータが多重されないサブフレームである指定サブフレームを指定する指定情報を前記リレー局装置から受信する第１受信部と、前記指定サブフレームのうち前記移動端末向けデータが割り当てられているか否かを示す割当情報が付加されたサブフレームのデータを受信する第２受信部と、を具備する移動端末を用いる。 Also, for example, a mobile terminal that uses a plurality of subframes and communicates with the base station apparatus via a base station apparatus and a relay station apparatus, and data to all the mobile terminals is not multiplexed in the plurality of subframes A first receiving unit that receives designation information designating a designated subframe, which is a subframe, from the relay station apparatus, and allocation information indicating whether or not data for the mobile terminal is allocated in the designated subframe is added. And a second receiving unit for receiving the subframe data.
　また、例えば、移動端末と、リレー局装置と、複数のサブフレームを用い前記リレー局装置を介し前記移動端末と通信を行なう基地局装置と、を含む通信システムであって、前記複数のサブフレームにおいて全ての前記移動端末へのデータが多重されないサブフレームである指定サブフレームを指定する指定情報を前記移動端末に送信するリレー局装置と、前記指定サブフレームのうち前記移動端末向けデータが割り当てられているか否かを示す割当情報が付加されたサブフレームのデータを受信する移動端末と、を具備する通信システムを用いる。 Also, for example, a communication system including a mobile terminal, a relay station apparatus, and a base station apparatus that communicates with the mobile terminal via the relay station apparatus using a plurality of subframes, wherein the plurality of subframes And a relay station device that transmits to the mobile terminal designation information that designates a designated subframe that is a subframe in which data to all the mobile terminals is not multiplexed, and data for the mobile terminal is allocated among the designated subframes. And a mobile terminal that receives subframe data to which assignment information indicating whether or not the information is attached is used.
　また、例えば、移動端末と、リレー局装置と、複数のサブフレームを用い前記リレー局装置を介し前記移動端末と通信を行なう基地局装置と、を含む通信システムの制御方法であって、前記複数のサブフレームにおいて全ての前記移動端末へのデータが多重されないサブフレームである指定サブフレームを指定する指定情報を前記移動端末に送信するステップと、前記移動端末が前記指定サブフレームのうち前記移動端末向けデータが割り当てられているか否かを示す割当情報が付加されたサブフレームのデータを受信するステップと、を含むことを特徴とする通信システムの制御方法を用いる。 Also, for example, a control method of a communication system including a mobile terminal, a relay station apparatus, and a base station apparatus that communicates with the mobile terminal via the relay station apparatus using a plurality of subframes, Transmitting to the mobile terminal designation information for designating a designated subframe that is a subframe in which data to all the mobile terminals is not multiplexed in the subframe, and the mobile terminal includes the mobile terminal in the designated subframe. Receiving a subframe data to which allocation information indicating whether or not the target data is allocated is added, and using the communication system control method.
　本基地局装置、リレー局装置、移動端末、通信システムおよびその制御方法によれば、移動端末への効率よいデータ送信を行なうことができる。 According to the base station apparatus, relay station apparatus, mobile terminal, communication system, and control method thereof, efficient data transmission to the mobile terminal can be performed.
図１は、実施例１が用いられる通信システムの例を示す図である。FIG. 1 is a diagram illustrating an example of a communication system in which the first embodiment is used. 図２は、基地局装置、リレー局装置および移動端末のブロック図である。FIG. 2 is a block diagram of the base station device, the relay station device, and the mobile terminal. 図３（ａ）および図３（ｂ）は、実施例１で用いるデータのフレーム構造を示す図である。FIGS. 3A and 3B are diagrams illustrating a data frame structure used in the first embodiment. 図４は、実施例１の基地局装置の処理部の処理を示すフローチャートである。FIG. 4 is a flowchart illustrating processing of the processing unit of the base station apparatus according to the first embodiment. 図５は、実施例１のリレー局装置の処理部の処理を示すフローチャートである。FIG. 5 is a flowchart illustrating processing of the processing unit of the relay station apparatus according to the first embodiment. 図６は、実施例１の移動端末の処理部の処理を示すフローチャートである。FIG. 6 is a flowchart illustrating processing of the processing unit of the mobile terminal according to the first embodiment. 図７（ａ）および図７（ｂ）は、実施例１のデータのフレーム構造を示す図である。FIG. 7A and FIG. 7B are diagrams illustrating a data frame structure according to the first embodiment. 図８（ａ）から図８（ｅ）は、サブフレームの構造を示す図である。FIG. 8A to FIG. 8E are diagrams illustrating a subframe structure. 図９は、実施例２が用いられる通信システムの例を示す図である。FIG. 9 is a diagram illustrating an example of a communication system in which the second embodiment is used. 図１０（ａ）から図１０（ｃ）は、実施例２のデータのフレーム構造を示す図である。FIG. 10A to FIG. 10C are diagrams illustrating a data frame structure according to the second embodiment. 図１１は、実施例３が用いられる通信システムの例を示す図である。FIG. 11 is a diagram illustrating an example of a communication system in which the third embodiment is used. 図１２は、実施例２のデータのフレーム構造を示す図である。FIG. 12 is a diagram illustrating a data frame structure according to the second embodiment.
　以下、図面を参照に実施例を説明する。 Hereinafter, embodiments will be described with reference to the drawings.
　図１は、実施例１が用いられる通信システムの例を示す図である。図１のように、通信システム１００は、基地局装置１０、リレー局装置２０および移動端末３０を含んでいる。基地局装置１０は、リレー局装置２０を介し移動端末３０と通信を行なう。すなわち、リレー局装置２０は、移動端末３０と基地局装置１０との通信を中継する。また、基地局装置１０は移動端末３０と直接通信を行なう。基地局装置１０は、リレー局装置２０を介し移動端末３０と通信を行なうことにより、直接移動端末３０と通信できない場所の移動端末３０と通信することができる。 FIG. 1 is a diagram illustrating an example of a communication system in which the first embodiment is used. As shown in FIG. 1, the communication system 100 includes a base station device 10, a relay station device 20, and a mobile terminal 30. Base station apparatus 10 communicates with mobile terminal 30 via relay station apparatus 20. That is, the relay station device 20 relays communication between the mobile terminal 30 and the base station device 10. Further, the base station apparatus 10 communicates directly with the mobile terminal 30. The base station device 10 can communicate with the mobile terminal 30 in a place where it cannot communicate directly with the mobile terminal 30 by communicating with the mobile terminal 30 via the relay station device 20.
　図２は、基地局装置１０、リレー局装置２０および移動端末３０のブロック図である。図２のように、基地局装置１０は、送受信部１８、１９、処理部１６およびメモリ１７を備えている。送受信部１８は、リレー局装置２０にデータ、指定情報および割当情報を送信する。また、リレー局装置２０からデータを受信する。送受信部１８は、移動端末３０に直接データ、指定情報および割当情報を送信することもできる。さらに、移動端末３０から直接データを受信することもできる。指定情報および割当情報については後述する。送受信部１９は、基地局制御装置とのデータおよびコマンドの送受信を行う。 FIG. 2 is a block diagram of the base station device 10, the relay station device 20, and the mobile terminal 30. As illustrated in FIG. 2, the base station apparatus 10 includes transmission / reception units 18 and 19, a processing unit 16, and a memory 17. The transmission / reception unit 18 transmits data, designation information, and allocation information to the relay station device 20. In addition, data is received from the relay station device 20. The transmission / reception unit 18 can also transmit data, designation information, and allocation information directly to the mobile terminal 30. Furthermore, data can be received directly from the mobile terminal 30. The designation information and allocation information will be described later. The transmission / reception unit 19 transmits / receives data and commands to / from the base station control device.
　処理部１６は第１送信部１２および第２送信部１４を含んでいる。第１送信部１２は、指定情報を送受信部１８を介し移動端末３０およびリレー局装置２０に送信する。第２送信部１４は、データおよび割当情報を送受信部１８を介し移動端末３０およびリレー局装置２０に送信する。メモリ１７は、データ、指示情報および割当情報を一時記憶する。 The processing unit 16 includes a first transmission unit 12 and a second transmission unit 14. The first transmission unit 12 transmits the designation information to the mobile terminal 30 and the relay station device 20 via the transmission / reception unit 18. The second transmission unit 14 transmits data and allocation information to the mobile terminal 30 and the relay station device 20 via the transmission / reception unit 18. The memory 17 temporarily stores data, instruction information, and allocation information.
　リレー局装置２０は、送受信部２８、２９、処理部２６およびメモリ２７を備えている。送受信部２８は、移動端末３０にデータおよび割当情報を送信する。また、移動端末３０からデータを受信する。送受信部２９は、基地局装置１０からデータ、指示情報を受信する。また、基地局装置１０にデータを送信する。 The relay station device 20 includes transmission / reception units 28 and 29, a processing unit 26, and a memory 27. The transmission / reception unit 28 transmits data and allocation information to the mobile terminal 30. In addition, data is received from the mobile terminal 30. The transmission / reception unit 29 receives data and instruction information from the base station apparatus 10. In addition, data is transmitted to the base station apparatus 10.
　処理部２６は受信部２２、第１送信部２３および第２送信部２４を含んでいる。受信部２２は、データおよび指定情報を送受信部２９を介し基地局装置１０から受信する。第１送信部２３は、指定情報を送受信部２８を介し移動端末３０に送信する。第２送信部２４は、データおよび割当情報を送受信部２８を介し移動端末３０に送信する。メモリ２７は、データ、指示情報および割当情報を一時記憶する。 The processing unit 26 includes a reception unit 22, a first transmission unit 23, and a second transmission unit 24. The receiving unit 22 receives data and designation information from the base station apparatus 10 via the transmission / reception unit 29. The first transmission unit 23 transmits the designation information to the mobile terminal 30 via the transmission / reception unit 28. The second transmission unit 24 transmits data and allocation information to the mobile terminal 30 via the transmission / reception unit 28. The memory 27 temporarily stores data, instruction information, and allocation information.
　移動端末３０は、送受信部３８、処理部３６およびメモリ３７を備えている。送受信部３８は、リレー局装置２０からデータおよび指示情報を受信する。また、リレー局装置２０にデータを送信する。送受信部３８は、基地局装置１０からデータ、指示情報および割当情報を直接受信することができる。さらに、基地局装置１０にデータを直接送信することができる。 The mobile terminal 30 includes a transmission / reception unit 38, a processing unit 36, and a memory 37. The transmission / reception unit 38 receives data and instruction information from the relay station device 20. In addition, data is transmitted to the relay station device 20. The transmission / reception unit 38 can directly receive data, instruction information, and allocation information from the base station apparatus 10. Furthermore, data can be directly transmitted to the base station apparatus 10.
　処理部３６は第１受信部３２および第２受信部３４を含んでいる。第１受信部３２は、指定情報を送受信部３８を介し基地局装置１０またはリレー局装置２０から受信する。第２受信部３４は、データおよび割当情報を送受信部３８を介しリレー局装置２０または基地局装置１０から受信する。メモリ２７は、データ、指示情報および割当情報を一時記憶する。 The processing unit 36 includes a first receiving unit 32 and a second receiving unit 34. The first reception unit 32 receives the designation information from the base station device 10 or the relay station device 20 via the transmission / reception unit 38. The second reception unit 34 receives data and allocation information from the relay station device 20 or the base station device 10 via the transmission / reception unit 38. The memory 27 temporarily stores data, instruction information, and allocation information.
　実施例１を３ＧＰＰのリリース８に適用した場合のフレーム構造の例を説明する。図３（ａ）は、基地局装置１０からリレー局装置２０または移動端末３０へのダウンリンク（ＤＬ）のデータのフレーム構造を示している。図３（ｂ）は、リレー局装置２０から移動端末３０へのダウンリンク（ＤＬ）のデータのフレーム構造を示している。図３（ａ）および図３（ｂ）のように、フレームは複数のサブフレーム４０を含んでいる。 An example of a frame structure when Example 1 is applied to 3GPP Release 8 will be described. FIG. 3A shows a frame structure of downlink (DL) data from the base station apparatus 10 to the relay station apparatus 20 or the mobile terminal 30. FIG. 3B shows a frame structure of downlink (DL) data from the relay station device 20 to the mobile terminal 30. As shown in FIGS. 3A and 3B, the frame includes a plurality of subframes 40.
　サブフレーム４０は制御チャネル４２とデータチャネル４４とを含んでいる。制御チャネル４２は、ＰＣＦＩＣＨ（Physical Control Format Indicator Channel）、ＰＨＩＣＨ（Physical Hybrid ARQ Indicator Channel）、ＰＤＣＣＨ（Physical Downlink Control Channel）等の制御チャネルを含む。また、ＰＣＦＩＣＨは、ＣＦＩ（Control Format indicator）を含む。ＣＦＩは、制御チャネル４２のシンボル数を規定するインジケータである。ＣＦＩは２ビットの情報であるが、３ＧＰＰのリリース８では０、１、２の３値が規定されており、ＣＦＩ＝３は未定義となっている。サブフレーム４０では、データチャネル４４は、ＰＤＳＣＨ（Physical Downlink Shared Channel）による移動端末３０向けデータ（ＵＥデータ５０）が多重される。一方、リレー局装置２０向けのサブフレームでは、データチャネル４４はバックホールデータ（ＲＮデータ５２）を含む。 The subframe 40 includes a control channel 42 and a data channel 44. The control channel 42 includes control channels such as PCFICH (Physical Control Hybrid Format Indicator Network), PHICH (Physical Hybrid ARQ Indicator Channel), and PDCCH (Physical Downlink Control Channel). PCFICH includes CFI (Control Format Indicator). The CFI is an indicator that defines the number of symbols of the control channel 42. Although CFI is 2-bit information, 3GPP release 8 defines three values of 0, 1, and 2, and CFI = 3 is undefined. In the subframe 40, data (UE data 50) for the mobile terminal 30 is multiplexed on the data channel 44 by PDSCH (Physical Downlink Shared Channel). On the other hand, in the subframe for relay station apparatus 20, data channel 44 includes backhaul data (RN data 52).
　非特許文献１に記載されているように、バックホールリンクにおけるバックホール用のサブフレームと同じタイミングでアクセスリンクで送信するサブフレームとしてＭＢＳＦＮサブフレーム４０ａ（指定サブフレーム）を用いる。３ＧＰＰのリリース８では、移動端末３０は、サブフレーム４０がＭＢＳＦＮサブフレーム４０ａか否かにかかわらず制御チャネル４２を受信する。しかし、リリース８移動端末３０は、ＭＢＳＦＮサブフレーム４０ａ内のデータチャネル４４は無視する。一方、リレー局装置２０は、制御チャネル４２は受信せず、データチャネル４４が自リレー局装置２０向けのデータか否かで、データチャネル４４のデータを受信するか否かを判断する。このように、ＭＢＳＦＮサブフレーム(指定サブフレーム)４０ａは、リリース８移動端末３０がサブフレーム４０内のデータを無視するサブフレームであり、全ての移動端末３０へのデータを多重しないサブフレームである。 As described in Non-Patent Document 1, the MBSFN subframe 40a (designated subframe) is used as a subframe transmitted through the access link at the same timing as the backhaul subframe in the backhaul link. In Release 8 of 3GPP, the mobile terminal 30 receives the control channel 42 regardless of whether the subframe 40 is the MBSFN subframe 40a or not. However, the release 8 mobile terminal 30 ignores the data channel 44 in the MBSFN subframe 40a. On the other hand, the relay station device 20 does not receive the control channel 42 and determines whether or not to receive the data of the data channel 44 based on whether or not the data channel 44 is data directed to the own relay station device 20. Thus, the MBSFN subframe (designated subframe) 40a is a subframe in which the release 8 mobile terminal 30 ignores the data in the subframe 40, and is a subframe in which data to all the mobile terminals 30 is not multiplexed. .
　基地局装置１０は、定期的にリレー局装置２０および移動端末３０に報知情報を送信する。報知情報としては、フレーム構造のうちＭＢＳＦＮサブフレームの位置を知らせる情報（指定情報）が含まれている。これにより、リレー局装置２０および移動端末３０は、いずれのサブフレームがＭＢＳＦＮサブフレームかを認識することができる。基地局装置１０は、何れかのサブフレーム４０を用い、リレー局装置２０および移動端末３０に報知情報を送信することができる。リレー局装置２０は、定期的に移動端末３０に報知情報を送信する。報知情報としては、フレーム構造のうちＭＢＳＦＮサブフレームの位置を知らせる情報（指定情報）が含まれている。これにより、移動端末３０は、いずれのサブフレームがＭＢＳＦＮサブフレームかを認識することができる。また、リレー局装置２０も、何れかのサブフレーム４０を用い、配下の移動端末３０に報知情報を送信することができる。 The base station apparatus 10 periodically transmits broadcast information to the relay station apparatus 20 and the mobile terminal 30. The broadcast information includes information (designation information) that informs the position of the MBSFN subframe in the frame structure. Thereby, the relay station apparatus 20 and the mobile terminal 30 can recognize which subframe is an MBSFN subframe. The base station apparatus 10 can transmit broadcast information to the relay station apparatus 20 and the mobile terminal 30 using any of the subframes 40. The relay station device 20 periodically transmits notification information to the mobile terminal 30. The broadcast information includes information (designation information) that informs the position of the MBSFN subframe in the frame structure. Thereby, the mobile terminal 30 can recognize which subframe is the MBSFN subframe. Further, the relay station apparatus 20 can also transmit the broadcast information to the subordinate mobile terminal 30 using any of the subframes 40.
　その後、基地局装置１０は、いずれのサブレームでいずれのリレー局装置２０向けのバックホールデータを送信するかを割り振る。その結果をリレー局装置２０に送信する。これにより、リレー局装置２０は、いずれのサブフレームが自リレー局装置２０向けかを認識することができる。基地局装置１０は、何れかのサブフレーム４０を用い、リレー局装置２０にバックホールサブフレームの割り振りの情報を送信することができる。リレー局装置２０は、自局あてのバックホールデータが多重されるサブフレームと同じタイミングでアクセスリンクで送信するサブフレームとしてＭＢＳＦＮサブフレーム４０ａ（指定サブフレーム）を用いる。 After that, the base station apparatus 10 assigns which subframe to which backhaul data for the relay station apparatus 20 is transmitted. The result is transmitted to the relay station device 20. Thereby, the relay station apparatus 20 can recognize which subframe is directed to the own relay station apparatus 20. The base station apparatus 10 can transmit backhaul subframe allocation information to the relay station apparatus 20 using any of the subframes 40. The relay station device 20 uses the MBSFN subframe 40a (designated subframe) as a subframe to be transmitted through the access link at the same timing as the subframe in which the backhaul data destined for the local station is multiplexed.
　図３（ａ）のように、１番目のサブフレーム４０がバックホールデータを送信するサブフレーム４０ａであり、基地局装置１０からリレー局装置２０向けのＲＮデータ５２の送信に用いられる。０番目および２から９番目のサブフレーム４０は、基地局装置１０から他の移動端末３０へのＵＥデータ５０の送信に用いられる。図３（ｂ）のように、アクセスリンクのＭＢＳＦＮサブフレーム４０ａでは、リレー局装置２０は、ブランク５４を送信する。０番目および２から９番目のサブフレーム４０は、リレー局装置２０から移動端末３０へのＵＥデータ５０の送信に用いられる。以上のように、ＵＥデータ５０は、基地局装置１０から移動端末３０に送信するデータである。また、ＲＮデータ５２は、基地局装置１０からリレー局装置２０に送信するデータである。 As shown in FIG. 3A, the first subframe 40 is a subframe 40a for transmitting backhaul data, and is used for transmission of RN data 52 from the base station apparatus 10 to the relay station apparatus 20. The 0th and 2nd to 9th subframes 40 are used for transmission of UE data 50 from the base station apparatus 10 to other mobile terminals 30. As shown in FIG. 3B, the relay station apparatus 20 transmits a blank 54 in the MBSFN subframe 40a of the access link. The 0th and 2nd to 9th subframes 40 are used for transmission of UE data 50 from the relay station apparatus 20 to the mobile terminal 30. As described above, the UE data 50 is data transmitted from the base station apparatus 10 to the mobile terminal 30. The RN data 52 is data transmitted from the base station device 10 to the relay station device 20.
　以上により、リレー局装置２０がデータを受信するサブフレーム４０ａにおいては、リレー局装置２０は移動端末３０にデータを送信しないため、リレー局装置２０の送受信間での干渉を抑制することができる。また、リレー局装置２０は、アクセスリンクのＭＢＳＦＮサブフレーム４０ａにおいて制御チャネル４２を送信するがバックホールリンクの制御チャネル４２は受信しない。これにより、制御チャネル４２においてもリレー局装置２０の送受信間での干渉を抑制することができる。 As described above, since the relay station device 20 does not transmit data to the mobile terminal 30 in the subframe 40a in which the relay station device 20 receives data, interference between transmission and reception of the relay station device 20 can be suppressed. Further, the relay station apparatus 20 transmits the control channel 42 in the MBSFN subframe 40a of the access link, but does not receive the control channel 42 of the backhaul link. Thereby, also in the control channel 42, the interference between transmission / reception of the relay station apparatus 20 can be suppressed.
　図４は、実施例１の基地局装置の処理部の処理を示すフローチャートである。図４のように、基地局装置１０の第１送信部１２は、複数のサブフレーム４０のうち指定サブフレーム４０ａ（例えば図３のＭＢＳＦＮサブフレームに相当する）を指定する（ステップＳ１０）。第１送信部１２は、指定サブフレーム４０ａを指定する指定情報を例えば報知情報としてリレー局装置２０および移動端末３０に送信する（ステップＳ１２）。報知情報は、例えば定期的に送信することができる。処理部１６は、各リレー局装置２０へバックホールデータの多重するサブフレームの割り振りを決定し、決定した割り振りを各リレー局装置２０に送信する（ステップＳ１４）。 FIG. 4 is a flowchart illustrating processing of the processing unit of the base station apparatus according to the first embodiment. As shown in FIG. 4, the first transmission unit 12 of the base station apparatus 10 designates a designated subframe 40a (for example, corresponding to the MBSFN subframe in FIG. 3) among the plurality of subframes 40 (step S10). The 1st transmission part 12 transmits the designation information which designates the designation | designated sub-frame 40a to the relay station apparatus 20 and the mobile terminal 30 as alerting | reporting information, for example (step S12). The broadcast information can be transmitted periodically, for example. The processing unit 16 determines the allocation of subframes in which backhaul data is multiplexed to each relay station device 20 and transmits the determined allocation to each relay station device 20 (step S14).
　以降、第２送信部１４は複数のサブフレーム４０の各々について、ステップＳ１６からＳ３４の処理を行なう。第２送信部１４は、ステップＳ１０の指定結果に基づきサブフレームが指定サブフレーム４０ａかを判定する（ステップＳ１６）。Ｎｏの場合、第２送信部１４は、サブフレーム４０のデータチャネル４４をＵＥデータ５０およびＲＮデータ５２とし、サブフレーム４０を移動端末３０およびリレー局装置２０に送信する。その後、ステップＳ３６に進む。 Thereafter, the second transmission unit 14 performs the processing of steps S16 to S34 for each of the plurality of subframes 40. The second transmission unit 14 determines whether the subframe is the designated subframe 40a based on the designation result in step S10 (step S16). In the case of No, the second transmission unit 14 uses the data channel 44 of the subframe 40 as the UE data 50 and the RN data 52, and transmits the subframe 40 to the mobile terminal 30 and the relay station device 20. Thereafter, the process proceeds to step S36.
　ステップＳ１６においてＹｅｓの場合、第２送信部１４は、ステップＳ１４の割り振りに基づきデータチャネル４４がＲＮデータ５２を含むか判定する（ステップＳ１８）。Ｎｏの場合、第２送信部１４は、制御チャネル４２内の割当情報を指定サブフレーム４０ａに移動端末３０向けデータが割り当てられていることを示すＹｅｓとする（ステップＳ２８）。例えば、ＣＦＩ＝３とする。第２送信部１４は、データチャネル４４としてＵＥデータ５０を移動端末３０に直接送信する（ステップＳ３０）。その後、ステップＳ３６に進む。 In the case of Yes in step S16, the second transmission unit 14 determines whether the data channel 44 includes the RN data 52 based on the allocation in step S14 (step S18). In the case of No, the second transmission unit 14 sets the allocation information in the control channel 42 to Yes indicating that the data for the mobile terminal 30 is allocated to the designated subframe 40a (step S28). For example, CFI = 3. The second transmitter 14 directly transmits the UE data 50 as the data channel 44 to the mobile terminal 30 (step S30). Thereafter, the process proceeds to step S36.
　ステップＳ１８においてＹｅｓの場合、第２送信部１４はステップＳ１４の割り振りに基づき、データチャネル４４がＵＥデータ５０を含むかを判定する（ステップＳ２０）。Ｙｅｓの場合、第２送信部１４は、制御チャネル４２内の割当情報をＹｅｓとする（ステップＳ３２）。例えば、ＣＦＩ＝３とする。第２送信部１４は、データチャネル４４としてＵＥデータ５０とＲＮデータ５２とをリレー局装置２０および移動端末３０に送信する（ステップＳ３４）。その後、ステップＳ３６に進む。 In the case of Yes in step S18, the second transmission unit 14 determines whether the data channel 44 includes the UE data 50 based on the allocation in step S14 (step S20). In the case of Yes, the 2nd transmission part 14 sets the allocation information in the control channel 42 to Yes (step S32). For example, CFI = 3. The second transmitter 14 transmits the UE data 50 and the RN data 52 as the data channel 44 to the relay station device 20 and the mobile terminal 30 (step S34). Thereafter, the process proceeds to step S36.
　ステップＳ２０においてＮｏの場合、第２送信部１４は、制御チャネル４２内の割当情報を指定サブフレーム４０ａに移動端末３０向けデータが割り当てられていないことを示すＮｏとする（ステップＳ２２）。例えば、ＣＦＩ≠３とする。第２送信部１４は、データチャネル４４としてＲＮデータ５２をリレー局装置２０に送信する（ステップＳ２４）。その後、ステップＳ３６に進む。 In the case of No in step S20, the second transmission unit 14 sets the allocation information in the control channel 42 to No indicating that the data for the mobile terminal 30 is not allocated to the designated subframe 40a (step S22). For example, CFI ≠ 3. The second transmitter 14 transmits the RN data 52 as the data channel 44 to the relay station device 20 (step S24). Thereafter, the process proceeds to step S36.
　処理部１６は、サブフレーム４０が最後のサブフレームか判定する（ステップＳ３６）。Ｙｅｓの場合、終了する。Ｎｏの場合、次のサブフレームとし、ステップＳ１６に進む。 The processing unit 16 determines whether the subframe 40 is the last subframe (step S36). If yes, end. In No, it is set as the next subframe and it progresses to step S16.
　図５は、実施例１のリレー局装置の処理部の処理を示すフローチャートである。図５のように、処理部２６の受信部２２は、複数のサブフレーム４０のうち指定サブフレームを指定する指定情報を受信する（ステップＳ４０）。受信部２２は、自リレー局装置２０向けＲＮデータを含むサブフレーム４０ａの位置情報を受信する（ステップＳ４２）。第１送信部２３は、指定情報を例えば報知情報として移動端末３０に送信する（ステップＳ４３）。報知情報は、例えば定期的に送信することができる。指定情報は、ステップＳ４０で受信した指定情報を同じでもよいが、図７（ａ）および図７（ｂ）で説明するように、リレー局装置２０が独自に設定してもよい。 FIG. 5 is a flowchart illustrating processing of the processing unit of the relay station apparatus according to the first embodiment. As shown in FIG. 5, the receiving unit 22 of the processing unit 26 receives designation information that designates a designated subframe among the plurality of subframes 40 (step S40). The receiving unit 22 receives the position information of the subframe 40a including the RN data for the own relay station device 20 (step S42). The 1st transmission part 23 transmits designation | designated information to the mobile terminal 30 as alerting | reporting information, for example (step S43). The broadcast information can be transmitted periodically, for example. The designation information may be the same as the designation information received in step S40, but may be set uniquely by the relay station device 20 as will be described with reference to FIGS. 7 (a) and 7 (b).
　以降、第２送信部２４は複数のサブフレーム４０の各々について、ステップＳ４６からＳ５６の処理を行なう。第２送信部２４は、ステップＳ４２で受信した位置情報に基づきデータチャネル４４が自リレー局装置２０向けのＲＮデータ５２を含むか判定する（ステップＳ４６）。Ｎｏの場合、第２送信部２４は、このサブフレームが指定サブフレームの場合は制御チャネル４２内の割当情報をＹｅｓとする（ステップＳ５４）。例えば、ＣＦＩ＝３とする。第２送信部２４は、データチャネル４４としてＵＥデータ５０を移動端末３０に送信する（ステップＳ５６）。その後、ステップＳ５８に進む。 Thereafter, the second transmission unit 24 performs the processing of steps S46 to S56 for each of the plurality of subframes 40. The second transmission unit 24 determines whether the data channel 44 includes the RN data 52 for the relay station device 20 based on the position information received in step S42 (step S46). In No, the 2nd transmission part 24 sets the allocation information in the control channel 42 to Yes, when this sub-frame is a designation | designated sub-frame (step S54). For example, CFI = 3. The second transmitter 24 transmits the UE data 50 as the data channel 44 to the mobile terminal 30 (step S56). Thereafter, the process proceeds to step S58.
　ステップＳ４６においてＹｅｓの場合、第２送信部２４は、このサブフレームが指定サブフレームの場合は、制御チャネル４２内の割当情報をＮｏとする（ステップＳ４８）。例えば、ＣＦＩ≠３とする。第２送信部２４は、データチャネル４４としてＵＥデータ５０を送信しない（ステップＳ５０）。例えば、データチャネル４４をブランク５４とする。その後、ステップＳ３６に進む。 In the case of Yes in step S46, the second transmission unit 24 sets No to the allocation information in the control channel 42 when this subframe is a designated subframe (step S48). For example, CFI ≠ 3. The second transmitter 24 does not transmit the UE data 50 as the data channel 44 (step S50). For example, the data channel 44 is a blank 54. Thereafter, the process proceeds to step S36.
　処理部２６は、サブフレーム４０が最後のサブフレームか判定する（ステップＳ５８）。Ｙｅｓの場合、終了する。Ｎｏの場合、次のサブフレームとし、ステップＳ４４に進む。 The processing unit 26 determines whether the subframe 40 is the last subframe (step S58). If yes, end. In No, it is set as the next subframe and it progresses to step S44.
　図６は、実施例１の移動端末の処理部の処理を示すフローチャートである。図６のように、処理部３６の第１受信部３２は、複数のサブフレーム４０のうち指定サブフレームを指定する指定情報を、基地局装置１０またはリレー局装置２０から受信する（ステップＳ６０）。 FIG. 6 is a flowchart illustrating processing of the processing unit of the mobile terminal according to the first embodiment. As shown in FIG. 6, the first receiving unit 32 of the processing unit 36 receives the designation information for designating the designated subframe among the plurality of subframes 40 from the base station device 10 or the relay station device 20 (step S60). .
　以降、第２受信部３４は複数のサブフレーム４０の各々について、ステップＳ６２からＳ７２の処理を行なう。第２受信部３４は、指定情報に基づき、サブフレームが指定サブフレーム４０ａかを判定する（ステップＳ６２）。Ｎｏの場合、第２受信部３４は、サブフレーム４０のデータチャネル４４のＵＥデータ５０を受信する（ステップＳ７０）。その後、ステップＳ７４に進む。 Thereafter, the second receiving unit 34 performs the processing of steps S62 to S72 for each of the plurality of subframes 40. The second reception unit 34 determines whether the subframe is the designated subframe 40a based on the designation information (Step S62). In No, the 2nd receiving part 34 receives UE data 50 of the data channel 44 of the sub-frame 40 (step S70). Thereafter, the process proceeds to step S74.
　ステップＳ６２においてＹｅｓの場合、第２受信部３４は、制御チャネル４２に含まれる割当情報がＹｅｓかＮｏかを判定する（ステップＳ６４）。すなわち、データチャネル４４に移動端末３０が読み込むべきＵＥデータが割り当てられているか否かを判定する。Ｙｅｓの場合、第２受信部３４は、データチャネル４４内のＵＥデータ５０を受信する（ステップＳ７２）。その後、ステップＳ７４に進む。ステップＳ６４においてＮｏの場合、第２受信部３４は、データチャネル４４内のデータを無視し、受信しない（ステップＳ６６）。 In the case of Yes in step S62, the second reception unit 34 determines whether the allocation information included in the control channel 42 is Yes or No (step S64). That is, it is determined whether or not UE data to be read by the mobile terminal 30 is assigned to the data channel 44. In the case of Yes, the 2nd receiving part 34 receives UE data 50 in the data channel 44 (step S72). Thereafter, the process proceeds to step S74. In the case of No in step S64, the second receiving unit 34 ignores the data in the data channel 44 and does not receive it (step S66).
　処理部３６は、サブフレーム４０が最後のサブフレームか判定する（ステップＳ７４）。Ｙｅｓの場合、終了する。Ｎｏの場合、次のサブフレームとし、ステップＳ６２に進む。 The processing unit 36 determines whether the subframe 40 is the last subframe (step S74). If yes, end. In No, it is set as the next subframe and it progresses to step S62.
　図７（ａ）は、実施例１における基地局装置１０からリレー局装置２０または移動端末３０へのダウンリンク（ＤＬ）のデータのフレーム構造を示している。図７（ｂ）は、実施例１におけるリレー局装置２０から移動端末３０へのダウンリンク（ＤＬ）のデータのフレーム構造を示している。 FIG. 7A shows a frame structure of downlink (DL) data from the base station apparatus 10 to the relay station apparatus 20 or the mobile terminal 30 in the first embodiment. FIG. 7B illustrates a frame structure of downlink (DL) data from the relay station apparatus 20 to the mobile terminal 30 in the first embodiment.
　図８（ａ）から図８（ｅ）は、図７（ａ）および図７（ｂ）のサブフレーム６０から６８の構造を示す図である。制御チャネル４２は２シンボルで形成されている。制御チャネル４２およびデータチャネル４４には、同期を取るための基準信号ＲＳが含まれている。図８（ａ）のように、サブフレーム６０は、ＭＢＳＦＮサブフレーム４０ａではない。このため、ＣＦＩ≠３であり、データチャネル４４にはＵＥデータ５０が割り当てられている。 8 (a) to 8 (e) are diagrams showing the structures of the subframes 60 to 68 in FIGS. 7 (a) and 7 (b). The control channel 42 is formed by two symbols. The control channel 42 and the data channel 44 include a reference signal RS for synchronization. As shown in FIG. 8A, the subframe 60 is not the MBSFN subframe 40a. Therefore, CFI ≠ 3 and UE data 50 is assigned to the data channel 44.
　図８（ｂ）のように、サブフレーム６２は、ＭＢＳＦＮサブフレーム４０ａである。データチャネル４４にはＲＮデータ５２が割り当てられ、ＣＦＩ≠３である。図８（ｃ）のように、サブフレーム６６のデータチャネル４４にはＵＥデータ５０とＲＮデータ５２とが割り当てられている。サブフレーム６６がＭＢＳＦＮサブフレーム４０ａの場合は、ＣＦＩ＝３である。 As shown in FIG. 8B, the subframe 62 is the MBSFN subframe 40a. RN data 52 is assigned to the data channel 44 and CFI ≠ 3. As shown in FIG. 8C, UE data 50 and RN data 52 are allocated to the data channel 44 of the subframe 66. When the subframe 66 is the MBSFN subframe 40a, CFI = 3.
　図８（ｄ）のように、サブフレーム６４は、ＭＢＳＦＮサブフレーム４０ａである。データチャネル４４はブランク５４であり、ＣＦＩ≠３である。図８（ｅ）のように、サブフレーム６８は、ＭＢＳＦＮサブフレーム４０ａである。データチャネル４４にはＵＥデータ５０が割り当てられ、ＣＦＩ＝３である。 As shown in FIG. 8D, the subframe 64 is the MBSFN subframe 40a. Data channel 44 is blank 54 and CFI ≠ 3. As shown in FIG. 8E, the subframe 68 is the MBSFN subframe 40a. UE data 50 is assigned to the data channel 44 and CFI = 3.
　図７（ａ）を参照し、基地局装置１０の送信フレームにおける１、６番目のサブフレーム４０がＭＢＳＦＮサブフレーム４０ａである。すなわち、図７（ａ）のＭＢＳＦＮ１１～１４がＭＢＳＦＮサブフレーム４０ａである。基地局装置１０は、全ての移動端末３０へのＵＥデータ５０が多重されていないサブフレームをＭＢＳＦＮサブフレーム４０ａとすることができる。このため、基地局装置１０は、例えばＵＥデータ５０とＲＮデータ５２とを多重する３番目のサブフレームをＭＢＳＦＮサブフレーム４０ａとしなくともよい。 Referring to FIG. 7A, the first and sixth subframes 40 in the transmission frame of the base station apparatus 10 are MBSFN subframes 40a. That is, MBSFNs 11 to 14 in FIG. 7A are MBSFN subframes 40a. The base station apparatus 10 can set a subframe in which the UE data 50 to all the mobile terminals 30 is not multiplexed as the MBSFN subframe 40a. For this reason, the base station apparatus 10 does not need to use the MBSFN subframe 40a as the third subframe in which, for example, the UE data 50 and the RN data 52 are multiplexed.
　図７（ｂ）を参照し、リレー局装置２０のアクセスリンクにおける１、３、６番目のサブフレーム４０がＭＢＳＦＮサブフレーム４０ａである。すなわち、図７（ｂ）のＭＢＳＦＮ２１～２６がＭＢＳＦＮサブフレーム４０ａである。図７（ａ）のように、基地局装置１０はこのリレー局装置２０へのＲＮデータ５２の送信は、１、３番目のサブフレーム４０に多重して送信を行なう。６番目のサブフレーム４０は、他のリレー局装置２０へのＲＮデータ５２の送信に用いられる。図７（ａ）および図７（ｂ）の例のように、基地局装置１０の設定するＭＢＳＦＮサブフレーム４０ａと、リレー局装置２０の設定するＭＢＳＦＮサブフレーム４０ａは同じでなくてもよい。 Referring to FIG. 7B, the first, third, and sixth subframes 40 in the access link of the relay station apparatus 20 are MBSFN subframes 40a. That is, MBSFN 21 to 26 in FIG. 7B are MBSFN subframes 40a. As shown in FIG. 7A, the base station apparatus 10 multiplexes the RN data 52 to the relay station apparatus 20 in the first and third subframes 40 and performs transmission. The sixth subframe 40 is used for transmission of the RN data 52 to the other relay station apparatus 20. As in the example of FIGS. 7A and 7B, the MBSFN subframe 40a set by the base station device 10 and the MBSFN subframe 40a set by the relay station device 20 may not be the same.
　図７（ａ）を参照に、各フレームの１番目のサブフレーム（ＭＢＳＦＮ１１、ＭＢＳＦＮ１３）および３番目のサブフレームは基地局装置１０から図７（ｂ）に示したリレー局装置２０へのＲＮデータ５２を含むサブフレームである。しかし、３番目のサブフレームはＭＢＳＦＮサブフレームではないため、基地局装置１０は３番目のサブフレームを用いＲＮデータ５２とＵＥデータ５０を多重して送信することができる。一方、１番目のサブフレーム（ＭＢＳＦＮ１１、ＭＢＳＦＮ１３）はＭＢＳＦＮサブフレームであるため、基地局装置１０は、ＵＥデータ５０を多重しない場合にはＣＦＩ≠３とする。すなわち割当情報をＮｏとする（図４のステップＳ２２）。ＵＥデータ５０を多重する場合にはＣＦＩ＝３とする（図４のステップＳ３２）。図７（ａ）における１番目のサブフレームでは、ＵＥデータ５０を多重しない場合を示している。 7A, the first subframe (MBSFN11, MBSFN13) and the third subframe of each frame are RN data from the base station apparatus 10 to the relay station apparatus 20 shown in FIG. 7B. 52 are subframes. However, since the third subframe is not an MBSFN subframe, the base station apparatus 10 can multiplex and transmit the RN data 52 and the UE data 50 using the third subframe. On the other hand, since the first subframe (MBSFN11, MBSFN13) is an MBSFN subframe, the base station apparatus 10 sets CFI ≠ 3 when the UE data 50 is not multiplexed. That is, the allocation information is No (step S22 in FIG. 4). When UE data 50 is multiplexed, CFI = 3 is set (step S32 in FIG. 4). The first subframe in FIG. 7A shows a case where the UE data 50 is not multiplexed.
　図７（ａ）および図７（ｂ）のように、ＭＢＳＦＮ２１、ＭＢＳＦＮ２２、ＭＢＳＦＮ２４、ＭＢＳＦＮ２５では、基地局装置１０が自リレー局装置２０宛のＲＮデータ５２を送信している。そこで、リレー局装置２０は、ＣＦＩ≠３とし（図５のステップＳ４８）、データチャネル４４をブランク５４とし移動端末３０に送信する（図５のステップＳ５０）。ＣＦＩ≠３であるため、移動端末３０はデータチャネルを無視する（図６のステップＳ６６）。 As shown in FIGS. 7A and 7B, in the MBSFN 21, the MBSFN 22, the MBSFN 24, and the MBSFN 25, the base station device 10 transmits the RN data 52 addressed to the own relay station device 20. Therefore, the relay station apparatus 20 sets CFI ≠ 3 (step S48 in FIG. 5), sets the data channel 44 to the blank 54, and transmits it to the mobile terminal 30 (step S50 in FIG. 5). Since CFI ≠ 3, the mobile terminal 30 ignores the data channel (step S66 in FIG. 6).
　図７（ａ）を参照し、６番目のサブフレーム（ＭＢＳＦＮ１２、ＭＢＳＦＮ１４）は基地局装置１０から移動端末３０へのＵＥデータ５０と基地局装置１０から図７（ｂ）に示したリレー局装置２０以外のリレー局装置へのＲＮデータ５２との両方を含むサブフレーム６６である。このため、基地局装置１０は、ＣＦＩ＝３とする。すなわち割当情報をＹｅｓとする（図４のステップＳ３２）。移動端末３０は、基地局装置１０から送信されたＭＢＳＦＮサブフレーム４０ａについてはＣＦＩ＝３であれば、データチャネル４４のＵＥデータ５０を受信する（図６のステップＳ７２）。一方、移動端末３０は、リレー局装置２０から送信されたＭＢＳＦＮサブフレーム４０ａについてはＣＦＩ≠３であれば、データチャネル４４のＵＥデータ５０を受信しない（図６のステップＳ６６）。 Referring to FIG. 7A, the sixth subframe (MBSFN12, MBSFN14) includes UE data 50 from the base station apparatus 10 to the mobile terminal 30 and the relay station apparatus shown in FIG. 7B from the base station apparatus 10. This is a subframe 66 including both RN data 52 to relay station devices other than 20. For this reason, the base station apparatus 10 sets CFI = 3. That is, the allocation information is set to Yes (step S32 in FIG. 4). If CFI = 3 for the MBSFN subframe 40a transmitted from the base station apparatus 10, the mobile terminal 30 receives the UE data 50 of the data channel 44 (step S72 in FIG. 6). On the other hand, if CFI ≠ 3 for the MBSFN subframe 40a transmitted from the relay station apparatus 20, the mobile terminal 30 does not receive the UE data 50 of the data channel 44 (step S66 in FIG. 6).
　図７（ａ）を参照し、ＭＢＳＦＮ１２、ＭＢＳＦＮ１４は基地局装置１０から移動端末３０へのＵＥデータ５０を含むが図７（ｂ）に示したリレー局装置２０へのＲＮデータ５２を含まないサブフレームである。このため、基地局装置１０は、ＣＦＩ＝３とする。すなわち割当情報をＹｅｓとする（図４のステップＳ３２）。図７（ｂ）のように、ＭＢＳＦＮ２３、ＭＢＳＦＮ２６では、自リレー局装置２０宛のＲＮデータ５２を含まない。このため、リレー局装置２０は、ＣＦＩ＝３とし（図５のステップＳ５４）、データチャネル４４をＵＥデータ５０としたサブフレーム６８を移動端末３０に送信する（図５のステップＳ５６）。移動端末３０は、リレー局装置２０から送信されたＭＢＳＦＮ２３、ＭＢＳＦＮ２６ではＣＦＩ＝３であるため、データチャネル４４のＵＥデータ５０を受信する（図６のステップＳ７２）。 7A, MBSFN 12 and MBSFN 14 include UE data 50 from base station apparatus 10 to mobile terminal 30, but do not include RN data 52 to relay station apparatus 20 shown in FIG. 7B. It is a frame. For this reason, the base station apparatus 10 sets CFI = 3. That is, the allocation information is set to Yes (step S32 in FIG. 4). As shown in FIG. 7B, the MBSFN 23 and the MBSFN 26 do not include the RN data 52 addressed to the own relay station device 20. For this reason, the relay station device 20 sets CFI = 3 (step S54 in FIG. 5), and transmits a subframe 68 in which the data channel 44 is UE data 50 to the mobile terminal 30 (step S56 in FIG. 5). The mobile terminal 30 receives the UE data 50 of the data channel 44 because CFI = 3 in the MBSFN 23 and the MBSFN 26 transmitted from the relay station apparatus 20 (step S72 in FIG. 6).
　実施例１によれば、図４のステップＳ２２、Ｓ２８およびＳ３２のように、基地局装置１０の第２送信部１４がＭＢＳＦＮサブフレーム（指定サブフレーム）４０ａにＵＥデータが割り当てられているか否かを示す割当情報を付加し移動端末３０に送信する。これにより、図７（ａ）のＭＢＳＦＮ１２、ＭＢＳＦＮ１４のように、ＭＢＳＦＮサブフレーム４０ａであっても、基地局装置１０は、各移動端末３０にユニキャストデータとしてＵＥデータ５０を送信することができる。よって、基地局装置１０から移動端末３０へのＵＥデータ５０送信のスループットを向上させることができる。 According to the first embodiment, as in steps S22, S28, and S32 of FIG. 4, whether or not the second transmission unit 14 of the base station device 10 has assigned UE data to the MBSFN subframe (designated subframe) 40a. Is added to the mobile terminal 30. Accordingly, the base station apparatus 10 can transmit the UE data 50 as unicast data to each mobile terminal 30 even in the MBSFN subframe 40a as in the MBSFN 12 and the MBSFN 14 in FIG. Therefore, the throughput of UE data 50 transmission from the base station apparatus 10 to the mobile terminal 30 can be improved.
　また、図５のステップＳ５４およびＳ５６のように、リレー局装置２０の第２送信部２４は、アクセスリンクのＭＢＳＦＮサブフレーム（指定サブフレーム）４０ａのうち、バックホールリンクにおいて自リレー局装置２０が受信するＲＮデータが含まれないサブフレームに対応するアクセスリンクのサブフレームにデータを割り当てる。第２送信部２４は、データを割り当てられたサブフレーム４０ａにＵＥデータが割り当てられているか否かを示す割当情報を付加し移動端末３０に送信する。これにより、図７（ｂ）のＭＢＳＦＮ２３およびＭＢＳＦＮ２６のように、ＭＢＳＦＮサブフレーム４０ａであっても、リレー局装置２０は、移動端末３０にＵＥデータ５０を送信することができる。よって、リレー局装置２０から移動端末３０へのＵＥデータ５０送信のスループットを向上させることができる。 Further, as in steps S54 and S56 of FIG. 5, the second transmission unit 24 of the relay station device 20 includes the relay station device 20 on the backhaul link in the MBSFN subframe (designated subframe) 40a of the access link. Data is allocated to the subframe of the access link corresponding to the subframe not including the RN data to be received. The second transmission unit 24 adds allocation information indicating whether or not UE data is allocated to the subframe 40 a to which data is allocated, and transmits it to the mobile terminal 30. Accordingly, the relay station apparatus 20 can transmit the UE data 50 to the mobile terminal 30 even in the MBSFN subframe 40a as in the MBSFN 23 and the MBSFN 26 in FIG. Therefore, the throughput of UE data 50 transmission from the relay station apparatus 20 to the mobile terminal 30 can be improved.
　さらに、図６のステップＳ６４およびＳ７２のように、移動端末３０の第２受信部３４は、ＭＢＳＦＮサブフレーム（指定サブフレーム）４０ａのうち割当情報が移動端末向けＵＥデータが割り当てられていることを示すサブフレームのデータを受信する。これにより、図７（ａ）のＭＢＳＦＮ１２、ＭＢＳＦＮ１４及び図７（ｂ）のＭＢＳＦＮ２３、ＭＢＳＦＮ２６のように、ＭＢＳＦＮサブフレーム４０ａであっても、基地局装置１０またはリレー局装置２０は、移動端末３０にＵＥデータ５０を送信することができる。よって、基地局装置１０またはリレー局装置２０から移動端末３０へのＵＥデータ５０送信のスループットを向上させることができる。 Further, as in steps S64 and S72 of FIG. 6, the second receiving unit 34 of the mobile terminal 30 confirms that the UE data for the mobile terminal is assigned to the allocation information in the MBSFN subframe (designated subframe) 40a. The data of the indicated subframe is received. As a result, the base station apparatus 10 or the relay station apparatus 20 is connected to the mobile terminal 30 even in the MBSFN subframe 40a as in the MBSFN 12 and MBSFN 14 in FIG. 7A and the MBSFN 23 and MBSFN 26 in FIG. UE data 50 can be transmitted. Therefore, the throughput of transmitting the UE data 50 from the base station device 10 or the relay station device 20 to the mobile terminal 30 can be improved.
　さらに、図４のステップＳ３０のように、第２送信部１４は、ＭＢＳＦＮサブフレーム（指定サブフレーム）４０ａのうちＲＮデータが含まれないサブフレームにデータを割り当て移動端末３０に直接送信する。第２送信部１４は、基地局装置１０からリレー局装置２０へ送信するデータが含まれない基地局装置送信サブフレーム（例えば図７（ａ）のＭＢＳＦＮ１２、１４）に対応するリレー局装置２０の指定サブフレーム（例えば図７（ｂ）のＭＢＳＦＮ２３、２６）にデータを割り当てる。データを割り当てた指定サブフレームを移動端末３０に送信する。これにより、ＭＢＳＦＮサブフレーム４０ａであっても、基地局装置１０は、移動端末３０にＵＥデータ５０を送信することができる。 Further, as in step S30 of FIG. 4, the second transmission unit 14 assigns data to subframes that do not include RN data in the MBSFN subframe (designated subframe) 40a and transmits the data directly to the mobile terminal 30. The second transmission unit 14 includes a relay station device 20 corresponding to a base station device transmission subframe (for example, MBSFN 12 and 14 in FIG. 7A) that does not include data to be transmitted from the base station device 10 to the relay station device 20. Data is allocated to a designated subframe (for example, MBSFN 23 and 26 in FIG. 7B). The designated subframe to which the data is assigned is transmitted to the mobile terminal 30. Thereby, the base station apparatus 10 can transmit the UE data 50 to the mobile terminal 30 even in the MBSFN subframe 40a.
　さらに、図４のステップＳ３４のように、第２送信部１４は、ＭＢＳＦＮサブフレーム（指定サブフレーム）４０ａの１つに、ＲＮデータと移動端末３０に直接送信するＵＥデータとの両方を割り当てリレー局装置２０および移動端末３０に送信する。これにより、図７（ａ）のＭＢＳＦＮ１２、ＭＢＳＦＮ１４のように、ＭＢＳＦＮサブフレーム４０ａであっても、基地局装置１０は、移動端末３０にＵＥデータ５０を送信することができる。 Further, as in step S34 of FIG. 4, the second transmission unit 14 assigns and relays both RN data and UE data directly transmitted to the mobile terminal 30 to one of the MBSFN subframes (designated subframes) 40a. It transmits to the station apparatus 20 and the mobile terminal 30. Thereby, the base station apparatus 10 can transmit the UE data 50 to the mobile terminal 30 even in the MBSFN subframe 40a as in the MBSFN 12 and the MBSFN 14 in FIG.
　実施例２は、複数のリレー局装置２０を用い移動端末３０にデータを協調送信する例である。図９は、実施例２が用いられる通信システムの例を示す図である。図９のように、通信システム１００ａは、基地局装置１０、リレー局装置２０ａおよび２０ｂおよび移動端末３０を含んでいる。基地局装置１０は、リレー局装置２０ａおよび２０ｂを介し移動端末３０と通信を行なう。また、基地局装置１０は移動端末３０と直接通信を行なう。このように、通信システム１００ａにおいては、リレー局装置２０ａとリレー局装置２０ｂとが、移動端末３０にデータを協調送信する。これにより、リレー局装置２０ａおよび２０ｂのいずれかから移動端末３０にデータが送信されれば、移動端末３０はデータを受信できる。実施例２における基地局装置１０の処理部１６、リレー局装置２０ａおよび２０ｂの処理部２６および移動端末３０の処理部３６の処理は、それぞれ図４から図６と同じであり説明を省略する。 Example 2 is an example in which data is cooperatively transmitted to the mobile terminal 30 using a plurality of relay station devices 20. FIG. 9 is a diagram illustrating an example of a communication system in which the second embodiment is used. As shown in FIG. 9, the communication system 100 a includes a base station device 10, relay station devices 20 a and 20 b, and a mobile terminal 30. Base station apparatus 10 communicates with mobile terminal 30 via relay station apparatuses 20a and 20b. Further, the base station apparatus 10 communicates directly with the mobile terminal 30. Thus, in the communication system 100a, the relay station device 20a and the relay station device 20b cooperatively transmit data to the mobile terminal 30. Thereby, if data is transmitted to the mobile terminal 30 from either of the relay station devices 20a and 20b, the mobile terminal 30 can receive the data. The processing of the processing unit 16 of the base station device 10, the processing unit 26 of the relay station devices 20a and 20b, and the processing unit 36 of the mobile terminal 30 in the second embodiment is the same as that shown in FIGS.
　図１０（ａ）は、実施例２における基地局装置１０からリレー局装置２０ａ、２０ｂまたは移動端末３０へのダウンリンク（ＤＬ）のデータのフレーム構造を示している。図１０（ｂ）は、実施例２におけるリレー局装置２０ａから移動端末３０へのダウンリンク（ＤＬ）のデータのフレーム構造を示している。図１０（ｃ）は、実施例２におけるリレー局装置２０ｂから移動端末３０へのダウンリンク（ＤＬ）のデータのフレーム構造を示している。 FIG. 10A shows a frame structure of downlink (DL) data from the base station apparatus 10 to the relay station apparatuses 20a and 20b or the mobile terminal 30 in the second embodiment. FIG. 10B illustrates a frame structure of downlink (DL) data from the relay station apparatus 20a to the mobile terminal 30 in the second embodiment. FIG. 10C illustrates a frame structure of downlink (DL) data from the relay station apparatus 20b to the mobile terminal 30 in the second embodiment.
　図１０（ａ）のように、ＭＢＳＦＮ１およびＭＢＳＦＮ３は、第２送信部１４が基地局装置１０からリレー局装置のうち１つのリレー局装置２０ａへ送信するデータを割り当てたＭＢＳＦＮサブフレームである。ＭＢＳＦＮ２およびＭＢＳＦＮ４は、第２送信部１４が基地局装置１０からリレー局装置のうち他方のリレー局装置２０ｂへ送信するデータを割り当てたＭＢＳＦＮサブフレームである。なお、サブフレーム６６ｂには、ＵＥデータ５０も含まれている。 As shown in FIG. 10 (a), MBSFN1 and MBSFN3 are MBSFN subframes to which the second transmitter 14 has assigned data to be transmitted from the base station device 10 to one relay station device 20a among the relay station devices. MBSFN2 and MBSFN4 are MBSFN subframes to which data to be transmitted from the base station apparatus 10 to the other relay station apparatus 20b by the second transmission unit 14 is assigned. Note that the UE data 50 is also included in the subframe 66b.
　図１０（ｂ）のように、リレー局装置２０ａ（ＲＮ１）は、自局宛のＲＮデータが含まれるＭＢＳＦＮサブフレームにおいては、移動端末３０向けのデータチャネル４４をブランク５４とする（図５のステップＳ５０）。また、ＣＦＩ≠３とする（図５のステップＳ４８）。一方、リレー局装置２０ａ（ＲＮ１）は、他のリレー局装置２０ｂ宛のＲＮデータが含まれるＭＢＳＦＮサブフレームにおいては、移動端末３０向けのデータチャネル４４をＵＥデータ５０とする（図５のステップＳ５６）。また、ＣＦＩ＝３とする(図５のステップＳ５４)。 As shown in FIG. 10B, the relay station apparatus 20a (RN1) sets the data channel 44 for the mobile terminal 30 to the blank 54 in the MBSFN subframe including the RN data addressed to the own station (FIG. 5). Step S50). Also, CFI ≠ 3 (step S48 in FIG. 5). On the other hand, the relay station apparatus 20a (RN1) sets the data channel 44 for the mobile terminal 30 as the UE data 50 in the MBSFN subframe including the RN data addressed to the other relay station apparatus 20b (step S56 in FIG. 5). ). Further, CFI = 3 is set (step S54 in FIG. 5).
　図１０（ｃ）のように、リレー局装置２０ｂ（ＲＮ２）は、自局宛のＲＮデータが含まれるＭＢＳＦＮサブフレームにおいては、移動端末３０向けのデータチャネル４４をブランク５４とする（図５のステップＳ５０）。また、ＣＦＩ≠３とする（図５のステップＳ４８）。一方、リレー局装置２０ｂ（ＲＮ２）は、他のリレー局装置２０ａ宛のＲＮデータが含まれるＭＢＳＦＮサブフレームにおいては、移動端末３０向けのデータチャネル４４をＵＥデータ５０とする（図５のステップＳ５６）。また、ＣＦＩ＝３とする（図５のステップＳ５４）。 As shown in FIG. 10C, the relay station apparatus 20b (RN2) sets the data channel 44 for the mobile terminal 30 to the blank 54 in the MBSFN subframe including the RN data addressed to the own station (FIG. 5). Step S50). Also, CFI ≠ 3 (step S48 in FIG. 5). On the other hand, the relay station apparatus 20b (RN2) sets the data channel 44 for the mobile terminal 30 as the UE data 50 in the MBSFN subframe including the RN data addressed to the other relay station apparatus 20a (step S56 in FIG. 5). ). Further, CFI = 3 is set (step S54 in FIG. 5).
　実施例２によれば、図４のステップＳ１４において、第２送信部１４は、リレー局装置２０ａ宛のＭＢＳＦＮ１、３（基地局装置１０から複数のリレー局装置のうち１つのリレー局装置に送信するデータを割り当てたサブフレーム）と、リレー局装置２０ｂ宛のＭＢＳＦＮ２、４（基地局装置１０から複数のリレー局装置のうち１つのリレー局装置に送信するデータを割り当てたサブフレーム）と、が時間的に重ならないようにする。これにより、基地局装置１０がリレー局装置２０ａにＲＮデータ５２を送信する際は、リレー局装置２０ｂが移動端末３０にＵＥデータ５０を送信することができる。一方、基地局装置１０がリレー局装置２０ｂにＲＮデータ５２を送信する際は、リレー局装置２０ａが移動端末３０にＵＥデータ５０を送信することができる。よって、移動端末３０にスループットよくＵＥデータ５０を送信することができる。 According to the second embodiment, in step S14 of FIG. 4, the second transmission unit 14 transmits MBSFN1 and 3 (addressed to the relay station apparatus 20a from the base station apparatus 10 to one relay station apparatus among a plurality of relay station apparatuses). And MBSFN2 and 4 addressed to the relay station device 20b (subframes assigned data to be transmitted from the base station device 10 to one relay station device). Avoid overlapping in time. Thereby, when the base station apparatus 10 transmits the RN data 52 to the relay station apparatus 20a, the relay station apparatus 20b can transmit the UE data 50 to the mobile terminal 30. On the other hand, when the base station apparatus 10 transmits the RN data 52 to the relay station apparatus 20b, the relay station apparatus 20a can transmit the UE data 50 to the mobile terminal 30. Therefore, the UE data 50 can be transmitted to the mobile terminal 30 with high throughput.
　実施例３は、リレー局装置２０と基地局装置１０とを用い移動端末３０にデータを協調送信する例である。図１１は、実施例３が用いられる通信システムの例を示す図である。図１１のように、通信システム１００ｂは、基地局装置１０、リレー局装置２０および移動端末３０を含んでいる。通信システム１００ｂにおいては、基地局装置１０とリレー局装置２０とは、移動端末３０にデータを協調送信する。実施例２における基地局装置１０の処理部１６、リレー局装置２０ａおよび２０ｂの処理部２６および移動端末３０の処理部３６の処理は、それぞれ図４から図６と同じであり説明を省略する。 Embodiment 3 is an example in which data is cooperatively transmitted to the mobile terminal 30 using the relay station device 20 and the base station device 10. FIG. 11 is a diagram illustrating an example of a communication system in which the third embodiment is used. As illustrated in FIG. 11, the communication system 100 b includes a base station device 10, a relay station device 20, and a mobile terminal 30. In the communication system 100b, the base station device 10 and the relay station device 20 cooperatively transmit data to the mobile terminal 30. The processing of the processing unit 16 of the base station device 10, the processing unit 26 of the relay station devices 20a and 20b, and the processing unit 36 of the mobile terminal 30 in the second embodiment is the same as that shown in FIGS.
　図１２は、実施例３における基地局装置１０からリレー局装置２０または移動端末３０へのダウンリンク（ＤＬ）のデータ、リレー局装置２０ａから移動端末３０へのダウンリンク（ＤＬ）のデータのフレーム構造を示している。 FIG. 12 illustrates a frame of downlink (DL) data from the base station apparatus 10 to the relay station apparatus 20 or the mobile terminal 30 and downlink (DL) data from the relay station apparatus 20a to the mobile terminal 30 in the third embodiment. The structure is shown.
　図１２のように、ＭＢＳＦＮ１およびＭＢＳＦＮ２において、基地局装置１０はリレー局装置２０にＲＮデータ５２を送信し、かつ移動端末３０にＵＥデータ５０を直接送信する（図４のステップＳ３４）。ＣＦＩ＝３とする（図４のステップＳ３２）。ＭＢＳＦＮ１およびＭＢＳＦＮ２において、リレー局装置２０は、データチャネル４４をブランク５４とする（図５のステップＳ５０）。ＣＦＩ≠３とする（図５のステップＳ４８）。ＭＢＳＦＮ１およびＭＢＳＦＮ２において、移動端末３０は、ＣＦＩ＝３のため、基地局装置１０が送信したＵＥデータ５０を受信できる（図６のステップＳ７２）。 12, in MBSFN1 and MBSFN2, base station apparatus 10 transmits RN data 52 to relay station apparatus 20, and directly transmits UE data 50 to mobile terminal 30 (step S34 in FIG. 4). CFI = 3 is set (step S32 in FIG. 4). In MBSFN1 and MBSFN2, the relay station apparatus 20 sets the data channel 44 to the blank 54 (step S50 in FIG. 5). It is assumed that CFI ≠ 3 (step S48 in FIG. 5). In MBSFN1 and MBSFN2, since CFI = 3, the mobile terminal 30 can receive the UE data 50 transmitted by the base station apparatus 10 (step S72 in FIG. 6).
　実施例３によれば、基地局装置１０の第２送信部１４は、リレー局装置２０に送信するデータ５２と、リレー局装置２０配下の移動端末３０も直接送信するデータ５０との両方を割り当てたサブフレーム（図１２のＭＢＳＦＮ１および２）を、リレー局装置２０および移動端末３０に送信する。このように、基地局装置１０とリレー局装置２０とが協調送信する場合、第２送信部１４がＭＢＳＦＮサブフレーム４０ａにＵＥデータ５０とＲＮデータ５２とを割り当てる。これにより、基地局装置１０は、リレー局装置２０にＲＮデータ５２を送信するサブフレームにおいても、移動端末３０にＵＥデータ５０を送信することができる。よって、移動端末３０にスループットよくＵＥデータ５０を送信することができる。 According to the third embodiment, the second transmission unit 14 of the base station device 10 assigns both the data 52 to be transmitted to the relay station device 20 and the data 50 to be directly transmitted by the mobile terminal 30 under the relay station device 20. The subframes (MBSFN1 and 2 in FIG. 12) are transmitted to relay station apparatus 20 and mobile terminal 30. As described above, when the base station apparatus 10 and the relay station apparatus 20 perform cooperative transmission, the second transmission unit 14 assigns the UE data 50 and the RN data 52 to the MBSFN subframe 40a. Thereby, the base station apparatus 10 can transmit the UE data 50 to the mobile terminal 30 even in the subframe in which the RN data 52 is transmitted to the relay station apparatus 20. Therefore, the UE data 50 can be transmitted to the mobile terminal 30 with high throughput.
　実施例１から実施例３において、指定サブフレームとしてＭＢＳＦＮサブフレームを例に説明したが、他のサブフレームを用いることができる。また、３ＰＧＧを例に説明したが、その他の通信システムに実施例１から実施例３を適用することもできる。割当情報としてＣＦＩを用いる例を説明したが、その他の制御チャネル４２内の情報を用いてもよい。また、制御チャネル４２以外に指定情報を付加してもよい。 In Embodiments 1 to 3, the MBSFN subframe has been described as an example of the designated subframe, but other subframes can be used. Further, although 3PGG has been described as an example, the first to third embodiments can be applied to other communication systems. Although an example in which CFI is used as the allocation information has been described, other information in the control channel 42 may be used. In addition to the control channel 42, designation information may be added.
　以上、本発明の好ましい実施例について詳述したが、本発明は係る特定の実施例に限定されるものではなく、特許請求の範囲に記載された本発明の要旨の範囲内において、種々の変形・変更が可能である。 The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible.

Claims (9)

  1. 　複数のサブフレームを用いた基地局装置と移動端末との通信を中継するリレー局装置であって、
    　前記複数のサブフレームにおいて前記移動端末へのデータを多重しないサブフレームである指定サブフレームを指定する指定情報を前記移動端末に送信する第１送信部と、
    　前記指定サブフレームに前記移動端末向けのデータが割り当てられているか否かを示す割当情報を付加し、前記指定サブフレームを前記移動端末に送信する第２送信部と、
    　を具備することを特徴とするリレー局装置。     A relay station device that relays communication between a base station device and a mobile terminal using a plurality of subframes,
    A first transmitter that transmits designation information for designating a designated subframe that is a subframe in which data to the mobile terminal is not multiplexed in the plurality of subframes;
    A second transmission unit for adding allocation information indicating whether or not data for the mobile terminal is allocated to the designated subframe, and transmitting the designated subframe to the mobile terminal;
    A relay station apparatus comprising:
  2. 　前記第２送信部は、前記基地局装置から前記リレー局装置へ送信するデータが含まれない前記基地局装置送信サブフレームに対応する前記リレー局装置の前記指定サブフレームにデータを割り当て、前記データを割り当てた前記指定サブフレームを前記移動端末に送信することを特徴とする請求項１記載のリレー局装置。 The second transmission unit allocates data to the designated subframe of the relay station apparatus corresponding to the base station apparatus transmission subframe not including data to be transmitted from the base station apparatus to the relay station apparatus, and the data The relay station apparatus according to claim 1, wherein the designated subframe to which is assigned is transmitted to the mobile terminal.
  3. 　複数のサブフレームを用い、移動端末およびリレー局装置を介し移動端末と通信を行なう基地局装置であって、
    　前記基地局装置から前記リレー局装置のうち１つのリレー局装置へ送信するデータを割り当てたサブフレームと、前記基地局装置から前記リレー局装置のうち他のリレー局装置に送信するデータを割り当てたサブフレームと、を時間的に重ならないように前記リレー局装置に送信する送信部を具備することを特徴とする基地局装置。     A base station apparatus that communicates with a mobile terminal via a mobile terminal and a relay station apparatus using a plurality of subframes,
    A subframe in which data to be transmitted from the base station apparatus to one relay station apparatus among the relay station apparatuses is allocated, and data to be transmitted from the base station apparatus to another relay station apparatus in the relay station apparatus are allocated. A base station apparatus comprising: a transmission unit that transmits a subframe to the relay station apparatus so as not to overlap with each other in time.
  4. 　前記１つのリレー局装置と前記他のリレー局装置とは、前記移動端末にデータを協調送信することを特徴とする請求項３記載の基地局装置。 The base station apparatus according to claim 3, wherein the one relay station apparatus and the other relay station apparatus transmit data to the mobile terminal in a coordinated manner.
  5. 　複数のサブフレームを用い、移動端末およびリレー局装置を介し移動端末と通信を行なう基地局装置であって、
    　前記リレー局装置に送信するデータと前記リレー局装置配下の前記移動端末に直接送信するデータとの両方を割り当てたサブフレームを前記リレー局装置および前記移動端末に送信する送信部を具備することを特徴とする基地局装置。     A base station apparatus that communicates with a mobile terminal via a mobile terminal and a relay station apparatus using a plurality of subframes,
    A transmission unit that transmits to the relay station apparatus and the mobile terminal a subframe in which both data to be transmitted to the relay station apparatus and data to be directly transmitted to the mobile terminal under the relay station apparatus are allocated. A characteristic base station apparatus.
  6. 　前記基地局装置と前記リレー局装置とは、前記移動端末にデータを協調送信することを特徴とする請求項５記載の基地局装置。 The base station apparatus according to claim 5, wherein the base station apparatus and the relay station apparatus cooperatively transmit data to the mobile terminal.
  7. 　複数のサブフレームを用い、基地局装置およびリレー局装置を介し基地局装置と通信を行なう移動端末であって、
    　前記複数のサブフレームにおいて全ての前記移動端末へのデータが多重されないサブフレームである指定サブフレームを指定する指定情報を前記リレー局装置から受信する第１受信部と、
    　前記指定サブフレームのうち前記移動端末向けデータが割り当てられているか否かを示す割当情報が付加されたサブフレームのデータを受信する第２受信部と、
    を具備することを特徴とする移動端末。     A mobile terminal that communicates with a base station apparatus via a base station apparatus and a relay station apparatus using a plurality of subframes,
    A first receiving unit that receives designation information for designating a designated subframe that is a subframe in which data to all the mobile terminals is not multiplexed in the plurality of subframes;
    A second receiving unit that receives data of a subframe to which assignment information indicating whether or not data for the mobile terminal is assigned among the designated subframes;
    A mobile terminal comprising:
  8. 　移動端末と、リレー局装置と、複数のサブフレームを用い前記リレー局装置を介し前記移動端末と通信を行なう基地局装置と、を含む通信システムであって、
    　前記複数のサブフレームにおいて全ての前記移動端末へのデータが多重されないサブフレームである指定サブフレームを指定する指定情報を前記移動端末に送信するリレー局装置と、
    　前記指定サブフレームのうち前記移動端末向けデータが割り当てられているか否かを示す割当情報が付加されたサブフレームのデータを受信する移動端末と、
    　を具備することを特徴とする通信システム。     A communication system including a mobile terminal, a relay station apparatus, and a base station apparatus that communicates with the mobile terminal via the relay station apparatus using a plurality of subframes,
    A relay station apparatus that transmits to the mobile terminal designation information that designates a designated subframe that is a subframe in which data to all the mobile terminals is not multiplexed in the plurality of subframes;
    A mobile terminal that receives data of a subframe to which assignment information indicating whether the data for the mobile terminal is assigned among the designated subframes;
    A communication system comprising:
  9. 　移動端末と、リレー局装置と、複数のサブフレームを用い前記リレー局装置を介し前記移動端末と通信を行なう基地局装置と、を含む通信システムの制御方法であって、
    　前記複数のサブフレームにおいて全ての前記移動端末へのデータが多重されないサブフレームである指定サブフレームを指定する指定情報を前記移動端末に送信するステップと、
    　前記移動端末が前記指定サブフレームのうち前記移動端末向けデータが割り当てられているか否かを示す割当情報が付加されたサブフレームのデータを受信するステップと、
    　を含むことを特徴とする通信システムの制御方法。     A control method for a communication system including a mobile terminal, a relay station apparatus, and a base station apparatus that communicates with the mobile terminal via the relay station apparatus using a plurality of subframes,
    Transmitting designation information for designating a designated subframe, which is a subframe in which data to all the mobile terminals is not multiplexed in the plurality of subframes, to the mobile terminal;
    The mobile terminal receiving data of a subframe to which assignment information indicating whether or not the data for the mobile terminal is assigned among the designated subframes;
    A control method for a communication system, comprising:
PCT/JP2009/059077 2009-05-15 2009-05-15 Base station device, relay station device, mobile terminal, communication system, and control method thereof WO2010131362A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2009/059077 WO2010131362A1 (en) 2009-05-15 2009-05-15 Base station device, relay station device, mobile terminal, communication system, and control method thereof
JP2011513197A JP5201263B2 (en) 2009-05-15 2009-05-15 Base station apparatus, relay station apparatus, communication system and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/059077 WO2010131362A1 (en) 2009-05-15 2009-05-15 Base station device, relay station device, mobile terminal, communication system, and control method thereof

Publications (1)

Publication Number Publication Date
WO2010131362A1 true WO2010131362A1 (en) 2010-11-18

Family

ID=43084752

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/059077 WO2010131362A1 (en) 2009-05-15 2009-05-15 Base station device, relay station device, mobile terminal, communication system, and control method thereof

Country Status (2)

Country Link
JP (1) JP5201263B2 (en)
WO (1) WO2010131362A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008104184A (en) * 2006-10-17 2008-05-01 Ntt Docomo Inc Cooperative diversity communication method applied to multi-hop communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008104184A (en) * 2006-10-17 2008-05-01 Ntt Docomo Inc Cooperative diversity communication method applied to multi-hop communication system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LG ELECTRONICS: "UL subframe stealing for in-band relaying in TDD mode", 3GPP, R1-090665, 13 February 2009 (2009-02-13) *
NOKIA ET AL.: "Considerations on TDD Relay", 3GPP, R1-090734, 13 February 2009 (2009-02-13) *

Also Published As

Publication number Publication date
JPWO2010131362A1 (en) 2012-11-01
JP5201263B2 (en) 2013-06-05

Similar Documents

Publication Publication Date Title
US10966199B2 (en) Method and apparatus for receiving or transmitting data
US11770214B2 (en) Method and system for configuring device-to-device communication
US20210160014A1 (en) Harq in sidelink in coverage and out-of-coverage scenarios
KR20230127959A (en) Apparatus for transmitting and receiving data through unlicensed band
CN102113398B (en) Resource allocation method for backhaul link and access link in wireless communication system including relay
US8792422B2 (en) Transferring method, relay station and base station for uplink feedback information in relay link
CN112601288B (en) Method and device used in user equipment and base station for wireless communication
US11848784B2 (en) Method and apparatus for performing HARQ operation
US8797896B2 (en) System and method for assigning backhaul resources
US8923750B2 (en) Method and apparatus for transmitting scheduling request in wireless communication system
CN102045773B (en) Method and device for processing data transmission conflict of relay node
JP2013533690A (en) How to assign an uplink control channel to a relay backhaul link
CN105122917A (en) System and methods of dynamic tdd configurations
US20170164213A1 (en) Transmission method and apparatus in mobile communication system
US20120106432A1 (en) Method for transmitting uplink signal with periodic and relay system for the same
WO2011029386A1 (en) Method for indicating relay link resource allocation, method and device for obtaining allocation information
JP2012524482A (en) Wireless relay method and device
EP4193542A1 (en) System and methods of pucch enhancement with intra-slot repetitions towards multiple trps
JP5643852B2 (en) Data retransmission apparatus and method in wireless communication system using multi-hop relay system
RU2516252C2 (en) Relay node, time division duplex communication system and communication method
KR20170088287A (en) Method and apparatus for receiving or transmitting data
US10009828B2 (en) User terminal and inter-terminal communication method
JP5201263B2 (en) Base station apparatus, relay station apparatus, communication system and control method thereof
CN107682933B (en) Wireless ad hoc network method and system based on improved TD-LTE special subframe structure
US20210376974A1 (en) Fairness and complexity constrained uplink transmission using coordinated multipoint (comp) non-orthogonal multiple access (noma)

Legal Events

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

Ref document number: 09844635

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2011513197

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09844635

Country of ref document: EP

Kind code of ref document: A1