WO2014156969A1 - Mobile station and radio base station - Google Patents

Mobile station and radio base station Download PDF

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Publication number
WO2014156969A1
WO2014156969A1 PCT/JP2014/057796 JP2014057796W WO2014156969A1 WO 2014156969 A1 WO2014156969 A1 WO 2014156969A1 JP 2014057796 W JP2014057796 W JP 2014057796W WO 2014156969 A1 WO2014156969 A1 WO 2014156969A1
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Prior art keywords
csi
mobile station
radio base
base station
resources
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PCT/JP2014/057796
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French (fr)
Japanese (ja)
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高橋　秀明
聡 永田
佑太 寒河江
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株式会社Ｎｔｔドコモ
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Publication of WO2014156969A1 publication Critical patent/WO2014156969A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Definitions

  • the present invention relates to a mobile station and a radio base station.
  • the radio base station eNB When downlink CoMP transmission processing is performed, the radio base station eNB is configured to set a plurality of CSI (Channel State Information) processes for the mobile station UE connected to the subordinate cell. .
  • CSI Channel State Information
  • the mobile station UE is configured to report CSI to the radio base station eNB for each set CSI process.
  • the mobile station UE uses “CRS (Cell Specific Reference Signal)” as “RSRP (Reference Signal Received Power) / RSRQ (Reference Signal Receive)”. It is configured to measure and report CSI based on the results.
  • CRS Cell Specific Reference Signal
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Receive
  • 3GPP TR 36.819 “Coordinated Multi-Point Operation for LTE Physical Layer Aspects”
  • CSI-RS Channel State Information Reference Signal
  • the radio base station eNB uses the resource to set CSI-RS. It is considered that the mobile station UE measures RSRP / RSRQ based on the CSI-RS.
  • the radio base station eNB transmits the resource # 2 (or CSI-RS) for a specific mobile station UE in the cell # 1 (or cell # 2). If resource # 3) is set, resource # 4 (or resource # 1) corresponding to resource # 2 (or resource # 3) in cell # 2 (or cell # 1) Then, it is configured not to transmit anything.
  • FIG. 11B shows the relationship between the serving cell and the interference cell in each CSI-RS resource.
  • the radio base station eNB needs to set all CSI-RS resources expected to report CSI to the mobile station UE, and transmit the CSI-RS in such resources. There was a problem that it was a load for the base station eNB.
  • the radio base station eNB can secure (pool) resources to be allocated as resources for CSI-RS, and can allocate each resource to a mobile station UE with good quality in the resource.
  • the present invention has been made in view of the above-described problems, and a mobile station and a radio base that can reduce the processing load of the radio base station in a case where the mobile station reports CSI based on CSI-RS.
  • the purpose is to provide a station.
  • a first feature of the present invention is a mobile station, and among resources for CSI-RS secured to the mobile station by a radio base station, a resource to which CSI-RS is not transmitted is used.
  • the gist is to include a measuring unit configured to measure wireless quality.
  • a second feature of the present invention is a radio base station configured to manage resources not transmitting CSI-RS among CSI-RS resources reserved for mobile stations. And a transmitter configured to transmit measurement target information for notifying the mobile station of resources not transmitting the CSI-RS.
  • FIG. 1 is an overall configuration diagram of a mobile communication system according to an embodiment of the present invention.
  • FIG. 2 is a functional block diagram of the radio base station according to the embodiment of the present invention.
  • FIG. 3 is a diagram illustrating an example of CSI-RS resources reserved by the radio base station according to the embodiment of the present invention.
  • FIG. 4 is a diagram illustrating an example of an information element “MeasObjectEUTRA” transmitted by the radio base station according to the embodiment of the present invention.
  • FIG. 5 is a diagram illustrating an example of an information element “MeasObjectEUTRA” transmitted by the radio base station according to the embodiment of the present invention.
  • FIG. 1 is an overall configuration diagram of a mobile communication system according to an embodiment of the present invention.
  • FIG. 2 is a functional block diagram of the radio base station according to the embodiment of the present invention.
  • FIG. 3 is a diagram illustrating an example of CSI-RS resources reserved by the radio base station according to the embodiment of the present invention.
  • FIG. 4 is
  • FIG. 6 is a diagram illustrating an example of an information element “MeasResults” transmitted by the radio base station according to the embodiment of the present invention.
  • FIG. 7 is a diagram illustrating an example of an information element “MeasResults” transmitted by the radio base station according to the embodiment of the present invention.
  • FIG. 8 is a diagram illustrating an example of the information element “CSI-RS-ConfigZP” in the information element “MeasResults” transmitted by the radio base station according to the embodiment of the present invention.
  • FIG. 9 is a diagram showing an example of the information element “CSI-RS-IdentityZP” in the information element “CSI-RS-ConfigZP” in the information element “MeasResults” transmitted by the radio base station according to the embodiment of the present invention. It is.
  • FIG. 10 is a functional block diagram of a mobile station according to the embodiment of the present invention.
  • FIG. 11 is a diagram for explaining the prior art.
  • Mobile communication system according to an embodiment of the present invention
  • or FIG. 10 the mobile communication system which concerns on embodiment of this invention is demonstrated.
  • an LTE mobile communication system will be described as an example of the mobile communication system according to the present embodiment, but the present invention is also applicable to mobile communication systems other than the LTE system.
  • the mobile communication system according to the present embodiment is configured to be able to perform downlink CoMP transmission processing.
  • the mobile communication system according to the present embodiment is configured to be able to provide downlink CoMP transmission processing in cells # 1 and # 2. That is, it is assumed that cells # 1 and # 2 are configured to be a support area for CoMP transmission processing in the downlink.
  • cells # 1 and # 2 may be managed by the same radio base station eNB, or may be managed by different radio base stations eNB. Further, cells # 1 and # 2 are assumed to have different coverage areas.
  • the cells # 1 and # 2 may be macro cells, or may be small cells that geographically overlap the macro cells.
  • the radio base station eNB includes a management unit 11, a transmission unit 12, and a reception unit 13.
  • the management unit 11 is configured to manage CSI-RS resources reserved for each mobile station UE in the cells # 1 and # 2.
  • the management unit 11 is configured to manage whether or not CSI-RS is transmitted in the CSI-RS resource reserved for each mobile station UE.
  • the management unit 11 is configured to manage resources that are not transmitting CSI-RS among CSI-RS resources reserved for each mobile station UE.
  • the radio base station eNB secures and sets a hatched CSI-RS resource in the cell # 1 for the mobile station UE, and transmits the CSI-RS in the set resource. Configured to do. Further, the management unit 11 is configured to secure CSI-RS resources # 1 to # 4 in the cell # 2 for the mobile station UE.
  • the transmission unit 12 is configured to transmit various signals to each mobile station UE
  • the reception unit 13 is configured to receive various signals from each mobile station UE.
  • the transmission unit 12 is configured to transmit CRS in the cells # 1 and # 2.
  • the CRS is a reference signal defined in the LTE Rel-8 / 9 scheme, and is a reference signal that is commonly set for all the mobile stations UE in each cell.
  • the transmission unit 12 is configured to be able to transmit CSI-RS using the set resource among the CSI-RS resources reserved for each mobile station UE in the cells # 1 and # 2.
  • the CSI-RS is a reference signal defined by the LTE Rel-10 scheme.
  • the transmission unit 12 transmits the CSI-RS in all of the CSI-RS resources # 1 to # 4 reserved for each mobile station UE in the cells # 1 and # 2. Absent.
  • the transmission unit 12 informs the mobile station UE of resources not transmitting the CSI-RS among the CSI-RS resources reserved for each mobile station UE, the information element “MeasObjectEUTRA” Is configured to send.
  • the transmission unit 12 is configured to notify the CSI-RS resources # 1 to # 4 using the information element “MeasObjectEUTRA”.
  • the transmission unit 12 uses “CSI-RS-ConfigZPToAddModList-r11” and “CSI-RS-ConfigZPToReleaseList-r11” in the information element “MeasObjectEUTRA”. It is configured to notify the above resources.
  • the receiving unit 13 is configured to receive “Measurement Report” generated based on the radio quality measured by the mobile station UE.
  • the “Measurement Report” is configured to include an information element “MeasResults”.
  • the information element “MeasResults” is configured to specify a resource used for measurement of radio quality by the mobile station UE.
  • the information element “CSI-RS-IdentityZP (see FIG. 9)” in the information element “CSI-RS-ConfigZP (see FIG. 8)” in the information element “MeasResults (see FIGS. 6 and 7)”. is configured to designate a resource used for radio quality measurement by the mobile station UE.
  • the mobile station UE includes a reception unit 21, a measurement unit 22, and a transmission unit 23.
  • the receiving unit 21 is configured to receive various signals from the radio base station eNB.
  • the receiving unit 21 is configured to receive the CSI-RS in the CSI-RS resource reserved for the mobile station UE by the radio base station eNB.
  • the receiving unit 21 is a resource other than the resource that does not transmit the CSI-RS notified by the information element “MeasObjectEUTRA” among the CSI-RS resources reserved for the mobile station UE by the radio base station eNB. In this resource, CSI-RS may be received.
  • the measurement unit 22 measures radio quality (RSRP or RSRQ) using a resource for which CSI-RS is not transmitted among resources for CSI-RS secured to the mobile station UE by the radio base station eNB. It is configured as follows.
  • the measurement unit 22 is configured to measure the radio quality (RSRP or RSRQ) in any of the resources # 1 to # 4. Note that the measurement unit 22 may be configured to measure radio quality (RSRP or RSRQ) in a plurality of resources among the resources # 1 to # 4.
  • the transmission unit 23 is configured to transmit “Measurement Report” generated based on the above-described radio quality (RSRP or RSRQ) to the radio base station eNB.
  • RSRP radio quality
  • RSRQ radio quality
  • the “Measurement Report” is configured to include the information element “MeasResults” illustrated in FIGS. 6 and 7.
  • the transmission unit 23 performs the information element “CSI-RS-IdentityZP () in the information element“ CSI-RS-ConfigZP (see FIG. 8) ”in the information element“ MeasResults (see FIGS. 6 and 7) ”.
  • the mobile station UE is configured to designate resources used for radio quality measurement.
  • the first feature of the present embodiment is the mobile station UE, and among the CSI-RS resources reserved for the mobile station UE by the radio base station eNB, resources for which CSI-RS is not transmitted
  • the gist is to include a measuring unit 22 configured to measure the wireless quality.
  • the mobile station UE uses the resources for which the CSI-RS is not transmitted among the CSI-RS resources reserved for the mobile station UE by the radio base station eNB, to improve the radio quality. Since it is configured to measure, it is not necessary for the radio base station eNB to transmit CSI-RS in all of the CSI-RS resources reserved for the mobile station UE, and the load on the radio base station eNB Can be reduced.
  • the mobile station UE includes a receiving unit 21 configured to acquire an information element “MeasObjectEUTRA (measurement target information)” that specifies a resource for which CSI-RS is not transmitted. Further, the measurement unit 22 may be configured to measure the radio quality using the resource specified by “MeasObjectEUTRA”.
  • MeasObjectEUTRA measurement target information
  • the mobile station UE diverts the existing information element “MeasObjectEUTRA”, and among the CSI-RS resources reserved for the mobile station UE, the resource for which the CSI-RS is not transmitted. Can be grasped.
  • the mobile station UE is configured to transmit a “Measurement Report” generated based on the above-described radio quality to the radio base station eNB.
  • the unit 23 may be further configured, and the “Measurement Report” may be configured to specify a resource used for the measurement of the wireless quality.
  • the radio base station eNB determines whether the CSI-RS is secured to the mobile station UE from among the resources for which the CSI-RS is not transmitted, by the mobile station UE. It is possible to know the resource that performed the measurement of the wireless quality.
  • the second feature of the present embodiment is a radio base station eNB that manages resources that do not transmit CSI-RS among resources for CSI-RS reserved for the mobile station UE.
  • a management unit 11 configured; and a transmission unit 12 configured to transmit to the mobile station UE an information element “MeasObjectEUTRA” notifying a resource not transmitting the CSI-RS. Is the gist.
  • the radio base station eNB notifies the mobile station UE of resources that are not transmitting CSI-RS among the CSI-RS resources reserved for the mobile station UE. Therefore, it is not necessary to transmit the CSI-RS in all of the CSI-RS resources, and a complicated procedure for changing the mobile station UE to which the CSI-RS resources are allocated can be avoided.
  • the radio base station eNB further includes a reception unit 23 configured to receive “Measurement Report” generated based on the radio quality measured by the mobile station UE.
  • the “Measurement Report” may be configured to designate a resource used for measurement of radio quality by the mobile station UE.
  • the radio base station eNB determines whether the CSI-RS is secured to the mobile station UE from among the resources for which the CSI-RS is not transmitted, by the mobile station UE. It is possible to know the resource that performed the measurement of the wireless quality.
  • radio base station eNB and the mobile station UE described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be implemented by a combination of both. .
  • the software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM).
  • RAM Random Access Memory
  • flash memory ROM (Read Only Memory)
  • EPROM Erasable Programmable ROM
  • EEPROM Electrically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM.
  • it may be provided in a storage medium of an arbitrary format such as a CD-ROM.
  • the storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station eNB or the mobile station UE. Further, the storage medium and the processor may be provided as a discrete component in the radio base station eNB or the mobile station UE.
  • the present invention it is possible to provide a mobile station and a radio base station that can reduce the processing load of the radio base station when the mobile station reports CSI based on CSI-RS. it can.
  • eNB radio base station UE ... mobile station 11 ... management unit 12, 23 ... transmitting unit 13, 21 ... receiving unit 22 ... measuring unit

Abstract

The objective of the invention is to reduce the processing load of a radio base station in a case where a mobile station reports CSI on the basis of CSI-RS. A mobile station (UE) of the present invention comprises a measurement unit (22) configured to measure a radio quality by use of that one of CSI-RS resources reserved by a radio base station (eNB) for the mobile station (UE) with which no CSI-RS has been transmitted.

Description

移動局及び無線基地局Mobile station and radio base station
本発明は、移動局及び無線基地局に関する。 The present invention relates to a mobile station and a radio base station.
　ＬＴＥ（Ｌｏｎｇ　Ｔｅｒｍ　Ｅｖｏｌｕｔｉｏｎ）方式において、セル端に位置する移動局ＵＥにおけるスループットの改善等を図ることを目的として、ＣｏＭＰ（Ｃｏｏｒｄｉｎａｔｅｄ　Ｍｕｌｔｉ-Ｐｏｉｎｔ、マルチポイント協調）送受信処理を適用することについて検討されている。 In the LTE (Long Term Evolution) system, the application of CoMP (Coordinated Multi-Point, multipoint coordination) transmission / reception processing has been studied for the purpose of improving the throughput of the mobile station UE located at the cell edge. Yes.
　下りリンクにおけるＣｏＭＰ送信処理が行われる場合、無線基地局ｅＮＢが、配下のセルに接続している移動局ＵＥに対して、複数のＣＳＩ（Ｃｈａｎｎｅｌ　Ｓｔａｔｅ　Ｉｎｆｏｒｍａｔｉｏｎ）プロセスを設定するように構成されている。 When downlink CoMP transmission processing is performed, the radio base station eNB is configured to set a plurality of CSI (Channel State Information) processes for the mobile station UE connected to the subordinate cell. .
　かかるＣｏＭＰ送受信処理が行われる場合、移動局ＵＥは、無線基地局ｅＮＢに対して、設定されているＣＳＩプロセスごとに、ＣＳＩを報告するように構成されている。 When such CoMP transmission / reception processing is performed, the mobile station UE is configured to report CSI to the radio base station eNB for each set CSI process.
　具体的には、Ｒｅｌｅａｓｅ-１１のＬＴＥ方式の仕様では、移動局ＵＥは、「ＣＲＳ（Ｃｅｌｌ　ｓｐｅｃｉｆｉｃ　Ｒｅｆｅｒｅｎｃｅ　Ｓｉｇｎａｌ）」を用いて「ＲＳＲＰ（Ｒｅｆｅｒｅｎｃｅ　Ｓｉｇｎａｌ　Ｒｅｃｅｉｖｅｄ　Ｐｏｗｅｒ）/ＲＳＲＱ（Ｒｅｆｅｒｅｎｃｅ　Ｓｉｇｎａｌ　Ｒｅｃｅｉｖｅｄ　Ｑｕａｌｉｔｙ）」を測定し、その結果に基づいてＣＳＩを報告するように構成されている。 Specifically, in the Release-11 LTE specification, the mobile station UE uses “CRS (Cell Specific Reference Signal)” as “RSRP (Reference Signal Received Power) / RSRQ (Reference Signal Receive)”. It is configured to measure and report CSI based on the results.
　現在、ＬＴＥ方式では、ＣｏＭＰ送受信処理を適用する移動局ＵＥに対してＣＳＩ－ＲＳ（Ｃｈａｎｎｅｌ　Ｓｔａｔｅ　Ｉｎｆｏｒｍａｔｉｏｎ　Ｒｅｆｅｒｅｎｃｅ　Ｓｉｇｎａｌ）用のリソースを設定し、無線基地局ｅＮＢが、かかるリソースを用いてＣＳＩ-ＲＳを送信し、移動局ＵＥが、かかるＣＳＩ-ＲＳに基づいてＲＳＲＰ/ＲＳＲＱを測定することを検討している。 Currently, in the LTE system, a resource for CSI-RS (Channel State Information Reference Signal) is set for a mobile station UE to which CoMP transmission / reception processing is applied, and the radio base station eNB uses the resource to set CSI-RS. It is considered that the mobile station UE measures RSRP / RSRQ based on the CSI-RS.
　具体的には、図１１（ａ）に示すように、無線基地局ｅＮＢは、セル＃１（或いは、セル＃２）において特定の移動局ＵＥに対してＣＳＩ-ＲＳ用のリソース＃２（或いは、リソース＃３）を設定している場合には、セル＃２（或いは、セル＃１）において、かかるリソース＃２（或いは、リソース＃３）に対応するリソース＃４（或いは、リソース＃１）では何も送信しないように構成されている。 Specifically, as illustrated in FIG. 11 (a), the radio base station eNB transmits the resource # 2 (or CSI-RS) for a specific mobile station UE in the cell # 1 (or cell # 2). If resource # 3) is set, resource # 4 (or resource # 1) corresponding to resource # 2 (or resource # 3) in cell # 2 (or cell # 1) Then, it is configured not to transmit anything.
　図１１（ｂ）に、各ＣＳＩ-ＲＳ用のリソースにおけるサービングセル及び干渉セルの関係を示す。 FIG. 11B shows the relationship between the serving cell and the interference cell in each CSI-RS resource.
　しかしながら、かかる場合、無線基地局ｅＮＢは、移動局ＵＥに対して、ＣＳＩの報告を期待する全てのＣＳＩ-ＲＳ用のリソースを設定し、かかるリソースにおいてＣＳＩ-ＲＳを送信する必要があり、無線基地局ｅＮＢにとって負荷であるという問題点があった。 However, in such a case, the radio base station eNB needs to set all CSI-RS resources expected to report CSI to the mobile station UE, and transmit the CSI-RS in such resources. There was a problem that it was a load for the base station eNB.
　また、無線基地局ｅＮＢは、ＣＳＩ-ＲＳ用のリソースとして割り当てるリソースを確保（プール）しておき、各リソースについて当該リソースにおいて品質の良い移動局ＵＥに対して割り当てることができる。 Also, the radio base station eNB can secure (pool) resources to be allocated as resources for CSI-RS, and can allocate each resource to a mobile station UE with good quality in the resource.
　しかしながら、現在のＬＴＥ方式の仕様では、無線基地局ｅＮＢは、あるＣＳＩ-ＲＳ用のリソースを、現在割り当てている移動局ＵＥ以外の移動局ＵＥに割り当てたい場合には、一度、当該リソースを開放して、当該リソースを新たに当該移動局ＵＥに割り当てる必要があり、無線基地局ｅＮＢの処理が煩雑になるという問題点があった。 However, in the current LTE specification, when a radio base station eNB wants to allocate a certain CSI-RS resource to a mobile station UE other than the currently allocated mobile station UE, the radio base station eNB releases the resource once. Thus, it is necessary to newly allocate the resource to the mobile station UE, and there is a problem that the processing of the radio base station eNB becomes complicated.
　そこで、本発明は、上述の課題に鑑みてなされたものであり、移動局がＣＳＩ-ＲＳに基づいてＣＳＩを報告するケースにおける無線基地局の処理負荷を軽減することができる移動局及び無線基地局を提供することを目的とする。 Therefore, the present invention has been made in view of the above-described problems, and a mobile station and a radio base that can reduce the processing load of the radio base station in a case where the mobile station reports CSI based on CSI-RS. The purpose is to provide a station.
　本発明の第１の特徴は、移動局であって、無線基地局によって前記移動局に対して確保されているＣＳＩ-ＲＳ用リソースのうち、ＣＳＩ-ＲＳが送信されていないリソースを用いて、無線品質を測定するように構成されている測定部を具備することを要旨とする。 A first feature of the present invention is a mobile station, and among resources for CSI-RS secured to the mobile station by a radio base station, a resource to which CSI-RS is not transmitted is used. The gist is to include a measuring unit configured to measure wireless quality.
　本発明の第２の特徴は、無線基地局であって、移動局に対して確保しているＣＳＩ-ＲＳ用リソースのうち、ＣＳＩ-ＲＳを送信していないリソースを管理するように構成されている管理部と、前記移動局に対して、前記ＣＳＩ-ＲＳを送信していないリソースを通知する測定対象情報を送信するように構成されている送信部とを具備することを要旨とする。 A second feature of the present invention is a radio base station configured to manage resources not transmitting CSI-RS among CSI-RS resources reserved for mobile stations. And a transmitter configured to transmit measurement target information for notifying the mobile station of resources not transmitting the CSI-RS.
図１は、本発明の実施形態に係る移動通信システムの全体構成図である。FIG. 1 is an overall configuration diagram of a mobile communication system according to an embodiment of the present invention. 図２は、本発明の実施形態に係る無線基地局の機能ブロック図である。FIG. 2 is a functional block diagram of the radio base station according to the embodiment of the present invention. 図３は、本発明の実施形態に係る無線基地局によって確保されるＣＳＩ-ＲＳ用のリソースの一例を示す図である。FIG. 3 is a diagram illustrating an example of CSI-RS resources reserved by the radio base station according to the embodiment of the present invention. 図４は、本発明の実施形態に係る無線基地局によって送信される情報要素「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」の一例を示す図である。FIG. 4 is a diagram illustrating an example of an information element “MeasObjectEUTRA” transmitted by the radio base station according to the embodiment of the present invention. 図５は、本発明の実施形態に係る無線基地局によって送信される情報要素「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」の一例を示す図である。FIG. 5 is a diagram illustrating an example of an information element “MeasObjectEUTRA” transmitted by the radio base station according to the embodiment of the present invention. 図６は、本発明の実施形態に係る無線基地局によって送信される情報要素「ＭｅａｓＲｅｓｕｌｔｓ」の一例を示す図である。FIG. 6 is a diagram illustrating an example of an information element “MeasResults” transmitted by the radio base station according to the embodiment of the present invention. 図７は、本発明の実施形態に係る無線基地局によって送信される情報要素「ＭｅａｓＲｅｓｕｌｔｓ」の一例を示す図である。FIG. 7 is a diagram illustrating an example of an information element “MeasResults” transmitted by the radio base station according to the embodiment of the present invention. 図８は、本発明の実施形態に係る無線基地局によって送信される情報要素「ＭｅａｓＲｅｓｕｌｔｓ」内の情報要素「ＣＳＩ-ＲＳ-ＣｏｎｆｉｇＺＰ」の一例を示す図である。FIG. 8 is a diagram illustrating an example of the information element “CSI-RS-ConfigZP” in the information element “MeasResults” transmitted by the radio base station according to the embodiment of the present invention. 図９は、本発明の実施形態に係る無線基地局によって送信される情報要素「ＭｅａｓＲｅｓｕｌｔｓ」内の情報要素「ＣＳＩ-ＲＳ-ＣｏｎｆｉｇＺＰ」内の情報要素「ＣＳＩ-ＲＳ-ＩｄｅｎｔｉｔｙＺＰ」の一例を示す図である。FIG. 9 is a diagram showing an example of the information element “CSI-RS-IdentityZP” in the information element “CSI-RS-ConfigZP” in the information element “MeasResults” transmitted by the radio base station according to the embodiment of the present invention. It is. 図１０は、本発明の実施形態に係る移動局の機能ブロック図である。FIG. 10 is a functional block diagram of a mobile station according to the embodiment of the present invention. 図１１は、従来技術を説明するための図である。FIG. 11 is a diagram for explaining the prior art.
（本発明の実施形態に係る移動通信システム）
　図１乃至図１０を参照して、本発明の実施形態に係る移動通信システムについて説明する。本実施形態では、本実施形態に係る移動通信システムとして、ＬＴＥ方式の移動通信システムを例示して説明するが、本発明は、ＬＴＥ方式以外の移動通信システムにも適用可能である。 (Mobile communication system according to an embodiment of the present invention)
With reference to FIG. 1 thru | or FIG. 10, the mobile communication system which concerns on embodiment of this invention is demonstrated. In the present embodiment, an LTE mobile communication system will be described as an example of the mobile communication system according to the present embodiment, but the present invention is also applicable to mobile communication systems other than the LTE system.
　本実施形態に係る移動通信システムは、下りリンクにおけるＣｏＭＰ送信処理を行うことができるように構成されている。 The mobile communication system according to the present embodiment is configured to be able to perform downlink CoMP transmission processing.
　図１に示すように、本実施形態に係る移動通信システムでは、セル＃１及び＃２において、下りリンクにおけるＣｏＭＰ送信処理を提供することができるように構成されている。すなわち、セル＃１及び＃２が、下りリンクにおけるＣｏＭＰ送信処理のサポートエリアとなるように構成されているものとする。 As shown in FIG. 1, the mobile communication system according to the present embodiment is configured to be able to provide downlink CoMP transmission processing in cells # 1 and # 2. That is, it is assumed that cells # 1 and # 2 are configured to be a support area for CoMP transmission processing in the downlink.
　なお、セル＃１及び＃２は、同一の無線基地局ｅＮＢによって管理されていてもよいし、異なる無線基地局ｅＮＢによって管理されていてもよい。また、セル＃１及び＃２は、異なるカバレッジエリアを有しているものとする。 Note that the cells # 1 and # 2 may be managed by the same radio base station eNB, or may be managed by different radio base stations eNB. Further, cells # 1 and # 2 are assumed to have different coverage areas.
　また、セル＃１及び＃２は、マクロセルであってもよいし、マクロセルに地理的に重なるスモールセルであってもよい。 Further, the cells # 1 and # 2 may be macro cells, or may be small cells that geographically overlap the macro cells.
　図２に示すように、本実施形態に係る無線基地局ｅＮＢは、管理部１１と、送信部１２と、受信部１３とを具備している。 As illustrated in FIG. 2, the radio base station eNB according to the present embodiment includes a management unit 11, a transmission unit 12, and a reception unit 13.
　管理部１１は、セル＃１及び＃２において各移動局ＵＥに対して確保しているＣＳＩ-ＲＳ用リソースを管理するように構成されている。 The management unit 11 is configured to manage CSI-RS resources reserved for each mobile station UE in the cells # 1 and # 2.
　また、管理部１１は、各移動局ＵＥに対して確保しているＣＳＩ-ＲＳ用リソースにおいてＣＳＩ-ＲＳを送信しているか否かについて管理するように構成されている。 Further, the management unit 11 is configured to manage whether or not CSI-RS is transmitted in the CSI-RS resource reserved for each mobile station UE.
　すなわち、管理部１１は、各移動局ＵＥに対して確保しているＣＳＩ-ＲＳ用リソースのうち、ＣＳＩ-ＲＳを送信していないリソースを管理するように構成されている。 That is, the management unit 11 is configured to manage resources that are not transmitting CSI-RS among CSI-RS resources reserved for each mobile station UE.
　図３の例では、無線基地局ｅＮＢは、移動局ＵＥに対して、セル＃１において、ハッチが付されたＣＳＩ-ＲＳ用リソースを確保および設定し、設定されたリソースにおいてＣＳＩ－ＲＳを送信するように構成される。また管理部１１は、移動局ＵＥに対して、セル＃２において、ＣＳＩ-ＲＳ用リソース＃１～＃４を確保するように構成されている。 In the example of FIG. 3, the radio base station eNB secures and sets a hatched CSI-RS resource in the cell # 1 for the mobile station UE, and transmits the CSI-RS in the set resource. Configured to do. Further, the management unit 11 is configured to secure CSI-RS resources # 1 to # 4 in the cell # 2 for the mobile station UE.
　送信部１２は、各移動局ＵＥに対して各種信号を送信するように構成されており、受信部１３は、各移動局ＵＥから各種信号を受信するように構成されている。 The transmission unit 12 is configured to transmit various signals to each mobile station UE, and the reception unit 13 is configured to receive various signals from each mobile station UE.
　具体的には、送信部１２は、セル＃１及び＃２において、ＣＲＳを送信するように構成されている。ここで、ＣＲＳは、ＬＴＥのＲｅｌ-８/９方式で規定されている参照信号であって、各セル内の全ての移動局ＵＥに対して共通に設定される参照信号である。 Specifically, the transmission unit 12 is configured to transmit CRS in the cells # 1 and # 2. Here, the CRS is a reference signal defined in the LTE Rel-8 / 9 scheme, and is a reference signal that is commonly set for all the mobile stations UE in each cell.
　また、送信部１２は、セル＃１及び＃２において各移動局ＵＥに対して確保しているＣＳＩ-ＲＳ用リソースのうち、設定したリソースにおいて、ＣＳＩ-ＲＳを送信することができるように構成されている。ここで、ＣＳＩ-ＲＳは、ＬＴＥのＲｅｌ-１０方式で規定されている参照信号である。 Further, the transmission unit 12 is configured to be able to transmit CSI-RS using the set resource among the CSI-RS resources reserved for each mobile station UE in the cells # 1 and # 2. Has been. Here, the CSI-RS is a reference signal defined by the LTE Rel-10 scheme.
　図３の例では、送信部１２は、セル＃１及び＃２において各移動局ＵＥに対して確保しているＣＳＩ-ＲＳ用リソース＃１～＃４の全てにおいて、ＣＳＩ-ＲＳを送信していない。 In the example of FIG. 3, the transmission unit 12 transmits the CSI-RS in all of the CSI-RS resources # 1 to # 4 reserved for each mobile station UE in the cells # 1 and # 2. Absent.
　また、送信部１２は、移動局ＵＥに対して、各移動局ＵＥに対して確保しているＣＳＩ-ＲＳ用リソースのうち、ＣＳＩ-ＲＳを送信していないリソースを通知する情報要素「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」を送信するように構成されている。 In addition, the transmission unit 12 informs the mobile station UE of resources not transmitting the CSI-RS among the CSI-RS resources reserved for each mobile station UE, the information element “MeasObjectEUTRA” Is configured to send.
　図３の例では、送信部１２は、情報要素「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」を用いて、ＣＳＩ-ＲＳ用リソース＃１～＃４を通知するように構成されている。 In the example of FIG. 3, the transmission unit 12 is configured to notify the CSI-RS resources # 1 to # 4 using the information element “MeasObjectEUTRA”.
　具体的には、送信部１２は、図４及び図５に示すように、情報要素「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」内の「ＣＳＩ-ＲＳ-ＣｏｎｆｉｇＺＰＴｏＡｄｄＭｏｄＬｉｓｔ-ｒ１１」及び「ＣＳＩ-ＲＳ-ＣｏｎｆｉｇＺＰＴｏＲｅｌｅａｓｅＬｉｓｔ-ｒ１１」を用いて、上述のリソースを通知するように構成されている。 Specifically, as illustrated in FIGS. 4 and 5, the transmission unit 12 uses “CSI-RS-ConfigZPToAddModList-r11” and “CSI-RS-ConfigZPToReleaseList-r11” in the information element “MeasObjectEUTRA”. It is configured to notify the above resources.
　また、受信部１３は、移動局ＵＥによって測定された無線品質に基づいて生成された「Ｍｅａｓｕｒｅｍｅｎｔ　Ｒｅｐｏｒｔ」を受信するように構成されている。 Also, the receiving unit 13 is configured to receive “Measurement Report” generated based on the radio quality measured by the mobile station UE.
　かかる「Ｍｅａｓｕｒｅｍｅｎｔ　Ｒｅｐｏｒｔ」は、情報要素「ＭｅａｓＲｅｓｕｌｔｓ」を含むように構成されている。ここで、情報要素「ＭｅａｓＲｅｓｕｌｔｓ」は、移動局ＵＥによって無線品質の測定に用いられたリソースを指定するように構成されている。 The “Measurement Report” is configured to include an information element “MeasResults”. Here, the information element “MeasResults” is configured to specify a resource used for measurement of radio quality by the mobile station UE.
　具体的には、情報要素「ＭｅａｓＲｅｓｕｌｔｓ（図６及び図７参照）」内の情報要素「ＣＳＩ-ＲＳ-ＣｏｎｆｉｇＺＰ（図８参照）」内の情報要素「ＣＳＩ-ＲＳ-ＩｄｅｎｔｉｔｙＺＰ（図９参照）」が、移動局ＵＥによって無線品質の測定に用いられたリソースを指定するように構成されている。 Specifically, the information element “CSI-RS-IdentityZP (see FIG. 9)” in the information element “CSI-RS-ConfigZP (see FIG. 8)” in the information element “MeasResults (see FIGS. 6 and 7)”. Is configured to designate a resource used for radio quality measurement by the mobile station UE.
　図１０に示すように、本実施形態に係る移動局ＵＥは、受信部２１と、測定部２２と、送信部２３とを具備している。 As shown in FIG. 10, the mobile station UE according to the present embodiment includes a reception unit 21, a measurement unit 22, and a transmission unit 23.
　受信部２１は、無線基地局ｅＮＢから各種信号を受信するように構成されている。 The receiving unit 21 is configured to receive various signals from the radio base station eNB.
　具体的には、受信部２１は、無線基地局ｅＮＢによって移動局ＵＥに対して確保されているＣＳＩ-ＲＳ用リソースにおいて、ＣＳＩ-ＲＳを受信するように構成されている。 Specifically, the receiving unit 21 is configured to receive the CSI-RS in the CSI-RS resource reserved for the mobile station UE by the radio base station eNB.
　ここで、受信部２１は、無線基地局ｅＮＢによって移動局ＵＥに対して確保されているＣＳＩ-ＲＳ用リソースのうち、情報要素「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」によって通知されたＣＳＩ-ＲＳを送信していないリソース以外のリソースにおいて、ＣＳＩ-ＲＳを受信するように構成されていてもよい。 Here, the receiving unit 21 is a resource other than the resource that does not transmit the CSI-RS notified by the information element “MeasObjectEUTRA” among the CSI-RS resources reserved for the mobile station UE by the radio base station eNB. In this resource, CSI-RS may be received.
　測定部２２は、無線基地局ｅＮＢによって移動局ＵＥに対して確保されているＣＳＩ-ＲＳ用リソースのうち、ＣＳＩ-ＲＳが送信されていないリソースを用いて無線品質（ＲＳＲＰやＲＳＲＱ）を測定するように構成されている。 The measurement unit 22 measures radio quality (RSRP or RSRQ) using a resource for which CSI-RS is not transmitted among resources for CSI-RS secured to the mobile station UE by the radio base station eNB. It is configured as follows.
　図３の例では、測定部２２は、リソース＃１～＃４の何れかにおいて無線品質（ＲＳＲＰやＲＳＲＱ）を測定するように構成されている。なお、測定部２２は、リソース＃１～＃４のうちの複数のリソースにおいて無線品質（ＲＳＲＰやＲＳＲＱ）を測定するように構成されていてもよい。 In the example of FIG. 3, the measurement unit 22 is configured to measure the radio quality (RSRP or RSRQ) in any of the resources # 1 to # 4. Note that the measurement unit 22 may be configured to measure radio quality (RSRP or RSRQ) in a plurality of resources among the resources # 1 to # 4.
　送信部２３は、無線基地局ｅＮＢに対して、上述の無線品質（ＲＳＲＰやＲＳＲＱ）に基づいて生成した「Ｍｅａｓｕｒｅｍｅｎｔ　Ｒｅｐｏｒｔ」を送信するように構成されている。 The transmission unit 23 is configured to transmit “Measurement Report” generated based on the above-described radio quality (RSRP or RSRQ) to the radio base station eNB.
　かかる「Ｍｅａｓｕｒｅｍｅｎｔ　Ｒｅｐｏｒｔ」は、図６及び図７に示す情報要素「ＭｅａｓＲｅｓｕｌｔｓ」を含むように構成されている。 The “Measurement Report” is configured to include the information element “MeasResults” illustrated in FIGS. 6 and 7.
　具体的には、送信部２３は、情報要素「ＭｅａｓＲｅｓｕｌｔｓ（図６及び図７参照）」内の情報要素「ＣＳＩ-ＲＳ-ＣｏｎｆｉｇＺＰ（図８参照）」内の情報要素「ＣＳＩ-ＲＳ-ＩｄｅｎｔｉｔｙＺＰ（図９参照）」によって、移動局ＵＥによって無線品質の測定に用いられたリソースを指定するように構成されている。 Specifically, the transmission unit 23 performs the information element “CSI-RS-IdentityZP () in the information element“ CSI-RS-ConfigZP (see FIG. 8) ”in the information element“ MeasResults (see FIGS. 6 and 7) ”. According to FIG. 9), the mobile station UE is configured to designate resources used for radio quality measurement.
　以上に述べた本実施形態の特徴は、以下のように表現されていてもよい。 The features of the present embodiment described above may be expressed as follows.
　本実施形態の第１の特徴は、移動局ＵＥであって、無線基地局ｅＮＢによって移動局ＵＥに対して確保されているＣＳＩ-ＲＳ用リソースのうち、ＣＳＩ-ＲＳが送信されていないリソースを用いて、無線品質を測定するように構成されている測定部２２を具備することを要旨とする。 The first feature of the present embodiment is the mobile station UE, and among the CSI-RS resources reserved for the mobile station UE by the radio base station eNB, resources for which CSI-RS is not transmitted The gist is to include a measuring unit 22 configured to measure the wireless quality.
　かかる特徴によれば、移動局ＵＥが、無線基地局ｅＮＢによって移動局ＵＥに対して確保されているＣＳＩ-ＲＳ用リソースのうち、ＣＳＩ-ＲＳが送信されていないリソースを用いて、無線品質を測定するように構成されているため、無線基地局ｅＮＢが、移動局ＵＥに対して確保されているＣＳＩ-ＲＳ用リソースの全てにおいてＣＳＩ-ＲＳを送信する必要がなくなり、無線基地局ｅＮＢの負荷を軽減することができる。 According to such a feature, the mobile station UE uses the resources for which the CSI-RS is not transmitted among the CSI-RS resources reserved for the mobile station UE by the radio base station eNB, to improve the radio quality. Since it is configured to measure, it is not necessary for the radio base station eNB to transmit CSI-RS in all of the CSI-RS resources reserved for the mobile station UE, and the load on the radio base station eNB Can be reduced.
　本実施形態の第１の特徴において、移動局ＵＥは、ＣＳＩ-ＲＳが送信されていないリソースを指定する情報要素「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ（測定対象情報）」を取得するように構成されている受信部２１を更に具備し、測定部２２は、「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」によって指定されているリソースを用いて、無線品質を測定するように構成されていてもよい。 In the first feature of the present embodiment, the mobile station UE includes a receiving unit 21 configured to acquire an information element “MeasObjectEUTRA (measurement target information)” that specifies a resource for which CSI-RS is not transmitted. Further, the measurement unit 22 may be configured to measure the radio quality using the resource specified by “MeasObjectEUTRA”.
　かかる特徴によれば、移動局ＵＥは、既存の情報要素「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」を流用して、移動局ＵＥに対して確保されているＣＳＩ-ＲＳ用リソースのうち、ＣＳＩ-ＲＳが送信されていないリソースを把握することができる。 According to this feature, the mobile station UE diverts the existing information element “MeasObjectEUTRA”, and among the CSI-RS resources reserved for the mobile station UE, the resource for which the CSI-RS is not transmitted. Can be grasped.
　本実施形態の第１の特徴において、移動局ＵＥは、無線基地局ｅＮＢに対して、上述の無線品質に基づいて生成した「Ｍｅａｓｕｒｅｍｅｎｔ　Ｒｅｐｏｒｔ（測定報告）」を送信するように構成されている送信部２３を更に具備し、「Ｍｅａｓｕｒｅｍｅｎｔ　Ｒｅｐｏｒｔ」は、かかる無線品質の測定に用いたリソースを指定するように構成されていてもよい。 In the first feature of the present embodiment, the mobile station UE is configured to transmit a “Measurement Report” generated based on the above-described radio quality to the radio base station eNB. The unit 23 may be further configured, and the “Measurement Report” may be configured to specify a resource used for the measurement of the wireless quality.
　かかる特徴によれば、無線基地局ｅＮＢが、移動局ＵＥに対して確保されているＣＳＩ-ＲＳ用リソースのうちＣＳＩ-ＲＳが送信されていないリソースの中から、移動局ＵＥによってＣＳＩの基礎となる無線品質の測定を行ったリソースを知ることができる。 According to such a feature, the radio base station eNB determines whether the CSI-RS is secured to the mobile station UE from among the resources for which the CSI-RS is not transmitted, by the mobile station UE. It is possible to know the resource that performed the measurement of the wireless quality.
　本実施形態の第２の特徴は、無線基地局ｅＮＢであって、移動局ＵＥに対して確保しているＣＳＩ-ＲＳ用リソースのうち、ＣＳＩ-ＲＳを送信していないリソースを管理するように構成されている管理部１１と、移動局ＵＥに対して、ＣＳＩ-ＲＳを送信していないリソースを通知する情報要素「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」を送信するように構成されている送信部１２とを具備することを要旨とする。 The second feature of the present embodiment is a radio base station eNB that manages resources that do not transmit CSI-RS among resources for CSI-RS reserved for the mobile station UE. A management unit 11 configured; and a transmission unit 12 configured to transmit to the mobile station UE an information element “MeasObjectEUTRA” notifying a resource not transmitting the CSI-RS. Is the gist.
　かかる特徴によれば、無線基地局ｅＮＢは、移動局ＵＥに対して、移動局ＵＥに対して確保しているＣＳＩ-ＲＳ用リソースのうち、ＣＳＩ-ＲＳを送信していないリソースを通知することで、ＣＳＩ-ＲＳ用リソースの全てにおいてＣＳＩ-ＲＳを送信する必要がなくなり、かつ、ＣＳＩ-ＲＳ用リソースを割り当てる移動局ＵＥを変更する際の煩雑な手続きを回避することができる。 According to this feature, the radio base station eNB notifies the mobile station UE of resources that are not transmitting CSI-RS among the CSI-RS resources reserved for the mobile station UE. Therefore, it is not necessary to transmit the CSI-RS in all of the CSI-RS resources, and a complicated procedure for changing the mobile station UE to which the CSI-RS resources are allocated can be avoided.
　本実施形態の第２の特徴において、無線基地局ｅＮＢは、移動局ＵＥによって測定された無線品質に基づいて生成された「Ｍｅａｓｕｒｅｍｅｎｔ　Ｒｅｐｏｒｔ」を受信するように構成されている受信部２３を更に具備しており、「Ｍｅａｓｕｒｅｍｅｎｔ　Ｒｅｐｏｒｔ」は、移動局ＵＥによって無線品質の測定に用いられたリソースを指定するように構成されていてもよい。 In the second feature of the present embodiment, the radio base station eNB further includes a reception unit 23 configured to receive “Measurement Report” generated based on the radio quality measured by the mobile station UE. In addition, the “Measurement Report” may be configured to designate a resource used for measurement of radio quality by the mobile station UE.
　かかる特徴によれば、無線基地局ｅＮＢが、移動局ＵＥに対して確保されているＣＳＩ-ＲＳ用リソースのうちＣＳＩ-ＲＳが送信されていないリソースの中から、移動局ＵＥによってＣＳＩの基礎となる無線品質の測定を行ったリソースを知ることができる。 According to such a feature, the radio base station eNB determines whether the CSI-RS is secured to the mobile station UE from among the resources for which the CSI-RS is not transmitted, by the mobile station UE. It is possible to know the resource that performed the measurement of the wireless quality.
　なお、上述の無線基地局ｅＮＢや移動局ＵＥの動作は、ハードウェアによって実施されてもよいし、プロセッサによって実行されるソフトウェアモジュールによって実施されてもよいし、両者の組み合わせによって実施されてもよい。 Note that the operations of the radio base station eNB and the mobile station UE described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be implemented by a combination of both. .
　ソフトウェアモジュールは、ＲＡＭ（Ｒａｎｄｏｍ　Ａｃｃｅｓｓ　Ｍｅｍｏｒｙ）や、フラッシュメモリや、ＲＯＭ（Ｒｅａｄ　Ｏｎｌｙ　Ｍｅｍｏｒｙ）や、ＥＰＲＯＭ（Ｅｒａｓａｂｌｅ　Ｐｒｏｇｒａｍｍａｂｌｅ　ＲＯＭ）や、ＥＥＰＲＯＭ（Ｅｌｅｃｔｒｏｎｉｃａｌｌｙ　Ｅｒａｓａｂｌｅ　ａｎｄ　Ｐｒｏｇｒａｍｍａｂｌｅ　ＲＯＭ）や、レジスタや、ハードディスクや、リムーバブルディスクや、ＣＤ-ＲＯＭといった任意形式の記憶媒体内に設けられていてもよい。 The software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM). Alternatively, it may be provided in a storage medium of an arbitrary format such as a CD-ROM.
　かかる記憶媒体は、プロセッサが当該記憶媒体に情報を読み書きできるように、当該プロセッサに接続されている。また、かかる記憶媒体は、プロセッサに集積されていてもよい。また、かかる記憶媒体及びプロセッサは、ＡＳＩＣ内に設けられていてもよい。かかるＡＳＩＣは、無線基地局ｅＮＢや移動局ＵＥ内に設けられていてもよい。また、かかる記憶媒体及びプロセッサは、ディスクリートコンポーネントとして無線基地局ｅＮＢや移動局ＵＥ内に設けられていてもよい。 The storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station eNB or the mobile station UE. Further, the storage medium and the processor may be provided as a discrete component in the radio base station eNB or the mobile station UE.
　以上、上述の実施形態を用いて本発明について詳細に説明したが、当業者にとっては、本発明が本明細書中に説明した実施形態に限定されるものではないということは明らかである。本発明は、請求の範囲の記載により定まる本発明の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。従って、本明細書の記載は、例示説明を目的とするものであり、本発明に対して何ら制限的な意味を有するものではない。 As described above, the present invention has been described in detail using the above-described embodiments. However, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and changes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.
　なお、日本国特許出願第２０１３－０６２９７１号（２０１３年３月２５日出願）の全内容が、参照により、本願明細書に組み込まれている。 Note that the entire contents of Japanese Patent Application No. 2013-062971 (filed on March 25, 2013) are incorporated herein by reference.
以上説明したように、本発明によれば、移動局がＣＳＩ-ＲＳに基づいてＣＳＩを報告するケースにおける無線基地局の処理負荷を軽減することができる移動局及び無線基地局を提供することができる。 As described above, according to the present invention, it is possible to provide a mobile station and a radio base station that can reduce the processing load of the radio base station when the mobile station reports CSI based on CSI-RS. it can.
ｅＮＢ…無線基地局
ＵＥ…移動局
１１…管理部
１２、２３…送信部
１３、２１…受信部
２２…測定部 eNB ... radio base station UE ... mobile station 11 ... management unit 12, 23 ... transmitting unit 13, 21 ... receiving unit 22 ... measuring unit

Claims (5)

  1. 　移動局であって、
    　無線基地局によって前記移動局に対して確保されているＣＳＩ-ＲＳ（Ｃｈａｎｎｅｌ　Ｓｔａｔｅ　Ｉｎｆｏｒｍａｔｉｏｎ-Ｒｅｆｅｒｅｎｃｅ　Ｓｉｇｎａｌ）用リソースのうち、ＣＳＩ-ＲＳが送信されていないリソースを用いて、無線品質を測定するように構成されている測定部を具備することを特徴とする移動局。     A mobile station,
    Among the resources for CSI-RS (Channel State Information-Reference Signal) reserved for the mobile station by the radio base station, the radio quality is measured using the resource to which CSI-RS is not transmitted. A mobile station comprising a configured measurement unit.
  2. 　前記ＣＳＩ-ＲＳが送信されていないリソースを指定する測定対象情報を取得するように構成されている受信部を更に具備し、
    　前記測定部は、前記測定対象情報によって指定されている前記リソースを用いて、無線品質を測定するように構成されていることを特徴とする請求項１に記載の移動局。     A receiver configured to acquire measurement target information specifying a resource for which the CSI-RS is not transmitted;
    The mobile station according to claim 1, wherein the measurement unit is configured to measure radio quality using the resource specified by the measurement target information.
  3. 　前記無線基地局に対して、前記無線品質に基づいて生成した測定報告を送信するように構成されている送信部を更に具備し、
    　前記測定報告は、前記無線品質の測定に用いた前記リソースを指定するように構成されていることを特徴とする請求項１又は２に記載の移動局。     A transmitter configured to transmit a measurement report generated based on the radio quality to the radio base station;
    The mobile station according to claim 1 or 2, wherein the measurement report is configured to designate the resource used for the measurement of the radio quality.
  4. 　移動局に対して確保しているＣＳＩ-ＲＳ（Ｃｈａｎｎｅｌ　Ｓｔａｔｅ　Ｉｎｆｏｒｍａｔｉｏｎ-Ｒｅｆｅｒｅｎｃｅ　Ｓｉｇｎａｌ）用リソースのうち、ＣＳＩ-ＲＳを送信していないリソースを管理するように構成されている管理部と、
    　前記移動局に対して、前記ＣＳＩ-ＲＳを送信していないリソースを通知する測定対象情報を送信するように構成されている送信部とを具備することを特徴とする無線基地局。     A management unit configured to manage resources not transmitting CSI-RS among resources for CSI-RS (Channel State Information-Reference Signal) reserved for mobile stations;
    A radio base station comprising: a transmission unit configured to transmit measurement target information for notifying the mobile station of resources not transmitting the CSI-RS.
  5. 　前記移動局によって測定された無線品質に基づいて生成された測定報告を受信するように構成されている受信部を更に具備しており、
    　前記測定報告は、前記移動局によって前記無線品質の測定に用いられたリソースを指定するように構成されていることを特徴とする請求項４に記載の無線基地局。     A receiver configured to receive a measurement report generated based on the radio quality measured by the mobile station;
    The radio base station according to claim 4, wherein the measurement report is configured to specify a resource used for the measurement of the radio quality by the mobile station.
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Publication number Priority date Publication date Assignee Title
WO2013021531A1 (en) * 2011-08-05 2013-02-14 パナソニック株式会社 Terminal, transmitting device, reception quality reporting method and reception method

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Publication number Priority date Publication date Assignee Title
WO2013021531A1 (en) * 2011-08-05 2013-02-14 パナソニック株式会社 Terminal, transmitting device, reception quality reporting method and reception method

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NTT DOCOMO: "Enhanced Interference Measurement Mechanisms for Rel. 11", 3GPP TSG RAN WG1 MEETING #70BIS, RL-124253, October 2012 (2012-10-01), pages 1 - 9 *

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