WO2013115252A1 - Mobile communication method, wireless base station, and mobile station - Google Patents

Mobile communication method, wireless base station, and mobile station Download PDF

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Publication number
WO2013115252A1
WO2013115252A1 PCT/JP2013/052048 JP2013052048W WO2013115252A1 WO 2013115252 A1 WO2013115252 A1 WO 2013115252A1 JP 2013052048 W JP2013052048 W JP 2013052048W WO 2013115252 A1 WO2013115252 A1 WO 2013115252A1
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cell
measurement
signal
base station
radio base
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PCT/JP2013/052048
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French (fr)
Japanese (ja)
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高橋　秀明
和晃 武田
武志 中森
安部田　貞行
石井　啓之
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株式会社エヌ・ティ・ティ・ドコモ
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the present invention relates to a mobile communication method, a radio base station, and a mobile station.
  • the LTE (Long Term Evolution) -Advanced method defines a new CC that is not compatible with an existing CC (Component Carrier, component carrier) in the CA (Carrier Aggregation, Carrier Aggregation), and the existing CC and the new CC. Realization of CA using the above has been studied.
  • Legacy Carrier such an existing CC is referred to as “Legacy Carrier”, and such a new CC is referred to as “Additional Carrier”.
  • control channel Control Channel
  • CRS Cell specific Reference Signal, cell-specific reference signal
  • the cell # 11 is a cell that is operated by a coverage band that supports a wide area
  • the cells # 11A / # 11B are cells that are operated by a capacity band for improving throughput at a hot spot. It is.
  • the radio base station eNB sets the cell # 11A / # 11B as “Scell (Secondary Cell)” for the mobile station UE that sets the cell # 11 as “Pcell (Primary Cell)”. for, the mobile station UE, it is necessary to perform the measurement process in the cell # 11A / # 11B.
  • the mobile station UE has the cells # 11A / # 11B. There is a problem that the measurement process cannot be performed.
  • the present invention has been made in view of the above-described problems, and even when “Additional Carrier” is applied, a mobile communication method, a radio base station, and a mobile communication method capable of appropriately performing measurement processing
  • the purpose is to provide a mobile station.
  • a first feature of the present invention is a mobile communication method in a mobile communication system comprising a first cell and a second cell arranged in the coverage area of the first cell, wherein the radio base station comprises: Transmitting to the mobile station connected in the first cell information for specifying a measurement signal to be used in the measurement process in the second cell; and And performing a measurement process in the second cell based on information for specifying, and the gist of the measurement signal is a signal other than a cell-specific reference signal.
  • a second feature of the present invention is a radio base station that manages the first cell in a mobile communication system that includes the first cell and a second cell that is disposed within the coverage area of the first cell.
  • a transmission unit configured to transmit information for specifying a measurement signal to be used for measurement processing in the second cell to a mobile station connected in the first cell;
  • the gist of the measurement signal is a signal other than a cell-specific reference signal.
  • a third feature of the present invention is a mobile station used in a mobile communication system comprising a first cell and a second cell arranged in a coverage area of the first cell, wherein the first cell Receiving unit configured to acquire information for specifying a measurement signal to be used in the measurement process in the second cell from the radio base station that manages the first cell when in the connected state in FIG. And a measurement unit configured to perform measurement processing in the second cell based on information for specifying the measurement signal, wherein the measurement signal is other than a cell-specific reference signal The gist of this is the signal.
  • FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
  • FIG. 2 is a functional block diagram of the radio base station according to the first embodiment of the present invention.
  • FIG. 3 is a diagram illustrating an example of a format of “MeasObjectEUTRA” transmitted by the radio base station according to the first embodiment of the present invention.
  • FIG. 4 is a diagram illustrating an example of a format of “PRS-Info” in “MeasObjectEUTRA” transmitted by the radio base station according to the first embodiment of the present invention.
  • FIG. 5 is a diagram illustrating an example of signals used for measurement processing in “Additional Carrier” in the mobile communication system according to the first embodiment of the present invention.
  • FIG. 6 is a diagram illustrating an example of signals used for measurement processing in “Additional Carrier” in the mobile communication system according to the first embodiment of the present invention.
  • FIG. 7 is a functional block diagram of the mobile station according to the first embodiment of the present invention.
  • the mobile communication system supports the LTE-Advanced scheme and is configured to provide CA.
  • the mobile communication system includes a radio base station eNB # 1 that manages cells # 11 / # 12 / # 13, a radio base station eNB # 11A that manages cell # 11A, Radio base station eNB # 11B that manages cell # 11B, radio base station eNB # 12A that manages cell # 12A, radio base station eNB # 13A that manages cell # 13A, and radio that manages cell # 13B Base station eNB # 13B etc. are provided.
  • the cells # 11A / # 11B are arranged in the cover area of the cell # 11
  • the cell # 12A is arranged in the cover area of the cell # 12
  • the cells # 13A / # 13B are Arranged in the cover area of cell # 13.
  • cells # 11 / # 12 / # 13 are macro cells operated by “Legacy Carrier”, and cells # 11A / # 11B / # 12A / # 13A / # 13B are operated by “Additional Carrier”. It may be a pico cell.
  • At least one of the cells # 11A / # 11B / # 12A / # 13A / # 13B may be operated by the “Legacy Carrier”.
  • the mobile station UE is described as being in the “RRC_Connected state” in the cell # 11 under the radio base station eNB # 1.
  • the functions of the radio base stations # 11A / # 11B / # 12A / # 13A / # 13B may be the same as the functions of the radio base station eNB # 1, or are different from the functions of the radio base station eNB # 1. It may be.
  • the radio base station eNB # 1 includes a receiving unit 11 and a transmitting unit 12.
  • the receiving unit 11 is configured to receive various signals transmitted by the mobile station UE and surrounding radio base stations # 11A / # 11B / # 12A / # 13A / # 13B.
  • the receiving unit 11 may be configured to receive “Measurement Report” from the mobile station UE.
  • the receiving unit 11 receives setting information such as information indicating whether “Additional Carrier” is applied from the surrounding radio base stations # 11A / # 11B / # 12A / # 13A / # 13B. It may be configured.
  • the transmission unit 12 is configured to transmit various signals to the mobile station UE and surrounding radio base stations # 11A / # 11B / # 12A / # 13A / # 13B.
  • the transmission unit 12 may be configured to transmit “RRC Reconfiguration” including “Measurement Configuration” including “MeasObjectEUTRA” to the mobile station UE.
  • the transmission unit 12 specifies, for the mobile station UE, information for specifying a measurement signal to be used for measurement processing in the measurement target carrier (specifically, information for specifying the configuration of the measurement signal). ) May be configured to be notified.
  • the transmission unit 12 may be configured to notify the mobile station UE of information for specifying a measurement signal to be used for measurement processing in the cells # 11A / # 11B.
  • the transmission unit 12 performs “positioning reference sign as a signal for a new addition carrier measurement or a signal for a new addition carrier measurement” in “MeasObjectEUTRA”.
  • Information for specifying the measurement signal may be notified.
  • PRS may be used as the measurement signal.
  • the transmission unit 12 performs the #new measurement signal for Positioning 11 in the cell # 11A / # in the “MeasObjectEUTRA” as a signal for a new addition carrier measurement or a signal for a new addition carrier measurement # 11A / # in the B11 measurement process in the cell # 11A.
  • PRS-info shown in FIG. 4 may be set.
  • the first signal shown in FIG. 5 may be used instead of the PRS, or the second signal shown in FIG. 6 may be used.
  • the first signal includes N orthogonal signals generated by randomly shifting subcarriers for each orthogonal sequence symbol and 6 orthogonal sequences generated with reference to the PRS. Of non-orthogonal sequences.
  • the second signal includes an orthogonal sequence generated using phase rotation in the frequency direction (cyclic shift in the time domain) instead of shifting subcarriers, and a scramble code of each orthogonal sequence. It consists of a non-orthogonal sequence generated by changing.
  • Identification information is given to each of the above-described PRS, the first signal, and the second signal, and the transmission unit 12 uses the “New additional carrier measurement” in “CellToAddModList-r11” in “MeasObjectEUTRA”.
  • Information for specifying signals other than CRS to be used for measurement processing (specifically, by setting such identification information in the “reference signal for Positioning as a signal for a new additional carrier measurement signal”) it may be configured to notify the information) for identifying the structure of the signal.
  • 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 transmitted by the radio base station eNB.
  • the receiving unit 21 may be configured to receive “RRC Reconfiguration” including “Measurement Configuration” including “MeasObjectEUTRA” from the radio base station eNB.
  • the reception unit 21 uses the “New addition carrier signal” signal in the “MeasObjectEUTRA” or the Positioning Reference signal as a signal for the new addition carrier measurement signal 11 in the measurement # 11A / # in the cell # 11A #.
  • Information for specifying the power measurement signal (specifically, information for specifying the configuration of the signal for measurement) may be acquired.
  • the measurement unit 22 is configured to perform a measurement process in accordance with “Measurement Configuration” received by the reception unit 21.
  • the measurement unit 22 specifies information for specifying a measurement signal to be used for measurement processing in the cells # 11A / # 11B (specifically, information for specifying the configuration of the measurement signal). May be configured to perform the measurement process described above.
  • the transmission unit 23 is configured to transmit “Measurement Report” including the above measurement result to the radio base station eNB.
  • the radio base station eNB uses the “Reference signal for Positioning” as a signal for “new addition carrier measurement” or a signal for new addition carrier measurement in “MeasObjectEUTRA”, 11, the mobile station UE in the “RRC_Connected state” can be notified of information for specifying the measurement signal in the cells # 11A / # 11B. Before setting # 11B as “Scell (Secondary Cell)”, the mobile station UE can perform measurement processing in the cells # 11A / # 11B.
  • the first feature of the present embodiment is that mobile communication in a mobile communication system comprising a cell # 11 (first cell) and a cell # 11A (second cell) arranged in the cover area of the cell # 11.
  • This is a method for the radio base station eNB # 1 to specify a measurement signal to be used for the measurement process in the cell # 11A for the mobile station UE in the “RRC_Connected state (connected state)” in the cell # 11.
  • the mobile station UE performs a measurement process in the cell # 11A based on the received information for specifying the measurement signal, and the measurement signal is a CRS (
  • the gist is that the signal is a signal other than a cell-specific reference signal.
  • a second feature of the present embodiment is that a radio base station eNB # that manages the cell # 11 in a mobile communication system that includes the cell # 11 and the cell # 11A that is arranged in the cover area of the cell # 11. 1 is a transmission configured to transmit information for specifying a measurement signal to be used in the measurement process in the cell # 11A to the mobile station UE in the “RRC_Connected state” in the cell # 11. comprising a part 12, such measurement signal is summarized in that a signal other than CRS.
  • a third feature of the present embodiment is a mobile station UE used in a mobile communication system that includes a cell # 11 and a cell # 11A arranged in the cover area of the cell # 11, and the cell # 11 In the “RRC_Connected state”, the radio base station eNB # 1 managing the cell # 11 is configured to acquire information for specifying a measurement signal to be used for the measurement process in the cell # 11A. And a measurement unit 22 configured to perform measurement processing in the cell # 11A based on the information for specifying the received measurement signal, and the measurement signal is a CRS.
  • the gist is that it is a signal other than.
  • the operations of the mobile station UE and the radio base station eNB 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. .
  • Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in 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 mobile station UE or the radio base station eNB. Further, the storage medium and the processor may be provided as a discrete component in the mobile station UE or the radio base station eNB.
  • UE ... mobile station eNB ... radio base station 11, 21 ... receiver 12, 23 ... transmitter 22 ... measuring unit

Abstract

An objective of the present invention is to carry out an appropriate measurement process even when an "Additional Carrier" is applied. A mobile communication method according to the present invention comprises: a step of a wireless base station (eNB#1) transmitting to a mobile station (UE) which is in an "RRC_Connected state" in a cell (#11) information for identifying a measurement signal to be used in a measurement process in a cell (#11A); and a step of the mobile station (UE) carrying out the measurement process in the cell (#11A) on the basis of the received information for identifying the measurement signal. The measurement signal is a signal other than a CRS.

Description

移動通信方法、無線基地局及び移動局Mobile communication method, radio base station, and mobile station
　本発明は、移動通信方法、無線基地局及び移動局に関する。 The present invention relates to a mobile communication method, a radio base station, and a mobile station.
　ＬＴＥ（Ｌｏｎｇ　Ｔｅｒｍ　Ｅｖｏｌｕｔｉｏｎ）-Ａｄｖａｎｃｅｄ方式では、ＣＡ（Ｃａｒｒｉｅｒ　Ａｇｇｒｉｇａｔｉｏｎ、キャリアアグリゲーション）において、既存のＣＣ（Ｃｏｍｐｏｎｅｎｔ　Ｃａｒｒｉｅｒ、コンポーネントキャリア）と互換性のない新規のＣＣを定義し、既存のＣＣ及び新規のＣＣを用いたＣＡを実現することが検討されている。 The LTE (Long Term Evolution) -Advanced method defines a new CC that is not compatible with an existing CC (Component Carrier, component carrier) in the CA (Carrier Aggregation, Carrier Aggregation), and the existing CC and the new CC. Realization of CA using the above has been studied.
　以下、かかる既存のＣＣを「Ｌｅｇａｃｙ　Ｃａｒｒｉｅｒ」と呼び、かかる新規のＣＣを「Ａｄｄｉｔｉｏｎａｌ　Ｃａｒｒｉｅｒ」と呼ぶものとする。 Hereinafter, such an existing CC is referred to as “Legacy Carrier”, and such a new CC is referred to as “Additional Carrier”.
　現在、ＬＴＥ-Ａｄｖａｎｃｅｄ方式では、制御チャネル（Ｃｏｎｔｒｏｌ　Ｃｈａｎｎｅｌ）及びＣＲＳ（Ｃｅｌｌ　ｓｐｅｃｉｆｉｃ　Ｒｅｆｅｒｅｎｃｅ　Ｓｉｇｎａｌ、セル特有の参照信号）を含まない「Ａｄｄｉｔｉｏｎａｌ　Ｃａｒｒｉｅｒ」、或いは、挿入される制御チャネル及びＣＲＳが低減されている「Ａｄｄｉｔｉｏｎａｌ　Ｃａｒｒｉｅｒ」を少なくとも１つ導入することについて合意されている。 Currently, in the LTE-Advanced system, the control channel (Control Channel) and CRS (Cell specific Reference Signal, cell-specific reference signal) that do not include “Additional Carrier” or inserted control channels and CRS are reduced. It has been agreed to introduce at least one “Additional Carrier”.
　現在、ＬＴＥ-Ａｄｖａｎｃｅｄ方式では、図１に示すように、セル＃１１のカバーエリア内にセル＃１１Ａ/＃１１Ｂ等を配置することが検討されている。 Currently, in the LTE-Advanced system, as shown in FIG. 1, it is considered to arrange cells # 11A / # 11B and the like in the cover area of cell # 11.
　ここで、セル＃１１は、広いエリアをサポートするカバレッジバンドによって運用されているセルであり、セル＃１１Ａ/＃１１Ｂは、ホットスポットにおいてスループットを改善させるためのキャパシティバンドによって運用されているセルである。 Here, the cell # 11 is a cell that is operated by a coverage band that supports a wide area, and the cells # 11A / # 11B are cells that are operated by a capacity band for improving throughput at a hot spot. It is.
　かかるケースにおいて、無線基地局ｅＮＢは、セル＃１１を「Ｐｃｅｌｌ（Ｐｒｉｍａｒｙ　Ｃｅｌｌ）」として設定している移動局ＵＥに対して、セル＃１１Ａ/＃１１Ｂを「Ｓｃｅｌｌ（Ｓｅｃｏｎｄａｒｙ　Ｃｅｌｌ）」として設定するために、移動局ＵＥに、セル＃１１Ａ/＃１１Ｂにおける測定処理を行わせる必要がある。 In such a case, the radio base station eNB sets the cell # 11A / # 11B as “Scell (Secondary Cell)” for the mobile station UE that sets the cell # 11 as “Pcell (Primary Cell)”. for, the mobile station UE, it is necessary to perform the measurement process in the cell # 11A / # 11B.
　しかしながら、現在、ＬＴＥ-Ａｄｖａｎｃｅｄ方式では、移動局ＵＥが「Ａｄｄｉｔｉｏｎａｌ　Ｃａｒｒｉｅｒ」においてどのように測定処理を行うべきについて規定されていないため、上述のケースにおいて、移動局ＵＥは、セル＃１１Ａ/＃１１Ｂにおける測定処理を行うことができないという問題点があった。 However, at present, in the LTE-Advanced scheme, it is not specified how the mobile station UE should perform the measurement process in the “Additional Carrier”. Therefore, in the above-described case, the mobile station UE has the cells # 11A / # 11B. There is a problem that the measurement process cannot be performed.
　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、「Ａｄｄｉｔｉｏｎａｌ　Ｃａｒｒｉｅｒ」が適用されている場合であっても、適切に測定処理を行うことができる移動通信方法、無線基地局及び移動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 even when “Additional Carrier” is applied, a mobile communication method, a radio base station, and a mobile communication method capable of appropriately performing measurement processing The purpose is to provide a mobile station.
　本発明の第１の特徴は、第１セルと、該第１セルのカバーエリア内に配置されている第２セルとを具備する移動通信システムにおける移動通信方法であって、無線基地局が、前記第１セルにおいて接続状態にある移動局に対して、前記第２セルにおいて測定処理に用いるべき測定用信号を特定するための情報を送信する工程と、前記移動局が、前記測定用信号を特定するための情報に基づいて、前記第２セルにおける測定処理を行う工程とを有し、前記測定用信号は、セル特有の参照信号以外の信号であることを要旨とする。 A first feature of the present invention is a mobile communication method in a mobile communication system comprising a first cell and a second cell arranged in the coverage area of the first cell, wherein the radio base station comprises: Transmitting to the mobile station connected in the first cell information for specifying a measurement signal to be used in the measurement process in the second cell; and And performing a measurement process in the second cell based on information for specifying, and the gist of the measurement signal is a signal other than a cell-specific reference signal.
　本発明の第２の特徴は、第１セルと、該第１セルのカバーエリア内に配置されている第２セルとを具備する移動通信システムにおいて、該第１セルを管理する無線基地局であって、前記第１セルにおいて接続状態にある移動局に対して、前記第２セルにおいて測定処理に用いるべき測定用信号を特定するための情報を送信するように構成されている送信部を具備し、前記測定用信号は、セル特有の参照信号以外の信号であることを要旨とする。 A second feature of the present invention is a radio base station that manages the first cell in a mobile communication system that includes the first cell and a second cell that is disposed within the coverage area of the first cell. A transmission unit configured to transmit information for specifying a measurement signal to be used for measurement processing in the second cell to a mobile station connected in the first cell; The gist of the measurement signal is a signal other than a cell-specific reference signal.
　本発明の第３の特徴は、第１セルと、該第１セルのカバーエリア内に配置されている第２セルとを具備する移動通信システムにおいて用いられる移動局であって、前記第１セルにおいて接続状態にある場合に、該第１セルを管理する無線基地局から、前記第２セルにおいて測定処理に用いるべき測定用信号を特定するための情報を取得するように構成されている受信部と、前記測定用信号を特定するための情報に基づいて、前記第２セルにおける測定処理を行うように構成されている測定部とを具備し、前記測定用信号は、セル特有の参照信号以外の信号であることを要旨とする。 A third feature of the present invention is a mobile station used in a mobile communication system comprising a first cell and a second cell arranged in a coverage area of the first cell, wherein the first cell Receiving unit configured to acquire information for specifying a measurement signal to be used in the measurement process in the second cell from the radio base station that manages the first cell when in the connected state in FIG. And a measurement unit configured to perform measurement processing in the second cell based on information for specifying the measurement signal, wherein the measurement signal is other than a cell-specific reference signal The gist of this is the signal.
図１は、本発明の第１の実施形態に係る移動通信システムの全体構成図である。FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. 図２は、本発明の第１の実施形態に係る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 first embodiment of the present invention. 図３は、本発明の第１の実施形態に係る無線基地局によって送信される「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」のフォーマットの一例を示す図である。FIG. 3 is a diagram illustrating an example of a format of “MeasObjectEUTRA” transmitted by the radio base station according to the first embodiment of the present invention. 図４は、本発明の第１の実施形態に係る無線基地局によって送信される「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」内の「ＰＲＳ-Ｉｎｆｏ」のフォーマットの一例を示す図である。FIG. 4 is a diagram illustrating an example of a format of “PRS-Info” in “MeasObjectEUTRA” transmitted by the radio base station according to the first embodiment of the present invention. 図５は、本発明の第１の実施形態に係る移動通信システムにおける「Ａｄｄｉｔｉｏｎａｌ　Ｃａｒｒｉｅｒ」において測定処理に用いられる信号の一例を示す図である。FIG. 5 is a diagram illustrating an example of signals used for measurement processing in “Additional Carrier” in the mobile communication system according to the first embodiment of the present invention. 図６は、本発明の第１の実施形態に係る移動通信システムにおける「Ａｄｄｉｔｉｏｎａｌ　Ｃａｒｒｉｅｒ」において測定処理に用いられる信号の一例を示す図である。FIG. 6 is a diagram illustrating an example of signals used for measurement processing in “Additional Carrier” in the mobile communication system according to the first embodiment of the present invention. 図７は、本発明の第１の実施形態に係る移動局の機能ブロック図である。FIG. 7 is a functional block diagram of the mobile station according to the first embodiment of the present invention.
（本発明の第１の実施形態に係る移動通信システム）
　図１乃至図７を参照して、本発明の第１の実施形態に係る移動通信システムについて説明する。 (Mobile communication system according to the first embodiment of the present invention)
With reference to FIG. 1 thru | or FIG. 7, the mobile communication system which concerns on the 1st Embodiment of this invention is demonstrated.
　本実施形態に係る移動通信システムは、ＬＴＥ-Ａｄｖａｎｃｅｄ方式をサポートするものであって、ＣＡを提供する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 supports the LTE-Advanced scheme and is configured to provide CA.
　図１に示すように、本実施形態に係る移動通信システムは、セル＃１１/＃１２/＃１３を管理する無線基地局ｅＮＢ＃１や、セル＃１１Ａを管理する無線基地局ｅＮＢ＃１１Ａや、セル＃１１Ｂを管理する無線基地局ｅＮＢ＃１１Ｂや、セル＃１２Ａを管理する無線基地局ｅＮＢ＃１２Ａや、セル＃１３Ａを管理する無線基地局ｅＮＢ＃１３Ａや、セル＃１３Ｂを管理する無線基地局ｅＮＢ＃１３Ｂ等を具備している。 As shown in FIG. 1, the mobile communication system according to the present embodiment includes a radio base station eNB # 1 that manages cells # 11 / # 12 / # 13, a radio base station eNB # 11A that manages cell # 11A, Radio base station eNB # 11B that manages cell # 11B, radio base station eNB # 12A that manages cell # 12A, radio base station eNB # 13A that manages cell # 13A, and radio that manages cell # 13B Base station eNB # 13B etc. are provided.
　ここで、セル＃１１Ａ/＃１１Ｂは、セル＃１１のカバーエリア内に配置されており、セル＃１２Ａは、セル＃１２のカバーエリア内に配置されており、セル＃１３Ａ/＃１３Ｂは、セル＃１３のカバーエリア内に配置されている。 Here, the cells # 11A / # 11B are arranged in the cover area of the cell # 11, the cell # 12A is arranged in the cover area of the cell # 12, and the cells # 13A / # 13B are Arranged in the cover area of cell # 13.
　例えば、セル＃１１/＃１２/＃１３は、「Ｌｅｇａｃｙ　Ｃａｒｒｉｅｒ」によって運用されているマクロセルであり、セル＃１１Ａ/＃１１Ｂ/＃１２Ａ/＃１３Ａ/＃１３Ｂは、「Ａｄｄｉｔｉｏｎａｌ　Ｃａｒｒｉｅｒ」によって運用されているピコセルであってもよい。 For example, cells # 11 / # 12 / # 13 are macro cells operated by “Legacy Carrier”, and cells # 11A / # 11B / # 12A / # 13A / # 13B are operated by “Additional Carrier”. It may be a pico cell.
　なお、セル＃１１Ａ/＃１１Ｂ/＃１２Ａ/＃１３Ａ/＃１３Ｂの少なくとも１つは、「Ｌｅｇａｃｙ　Ｃａｒｒｉｅｒ」によって運用されていてもよい。 Note that at least one of the cells # 11A / # 11B / # 12A / # 13A / # 13B may be operated by the “Legacy Carrier”.
　なお、本実施形態では、移動局ＵＥは、無線基地局ｅＮＢ＃１配下のセル＃１１において「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」であるものとして説明を行う。 In the present embodiment, the mobile station UE is described as being in the “RRC_Connected state” in the cell # 11 under the radio base station eNB # 1.
　以下、本実施形態に係る無線基地局ｅＮＢ＃１の機能について説明する。なお、無線基地局＃１１Ａ/＃１１Ｂ/＃１２Ａ/＃１３Ａ/＃１３Ｂの機能は、無線基地局ｅＮＢ＃１の機能と同一であってもよいし、無線基地局ｅＮＢ＃１の機能と異なっていてもよい。 Hereinafter, functions of the radio base station eNB # 1 according to the present embodiment will be described. The functions of the radio base stations # 11A / # 11B / # 12A / # 13A / # 13B may be the same as the functions of the radio base station eNB # 1, or are different from the functions of the radio base station eNB # 1. It may be.
　図２に示すように、本実施形態に係る無線基地局ｅＮＢ＃１は、受信部１１と、送信部１２とを具備している。 As shown in FIG. 2, the radio base station eNB # 1 according to the present embodiment includes a receiving unit 11 and a transmitting unit 12.
　受信部１１は、移動局ＵＥや周辺の無線基地局＃１１Ａ/＃１１Ｂ/＃１２Ａ/＃１３Ａ/＃１３Ｂによって送信される各種信号を受信するように構成されている。 The receiving unit 11 is configured to receive various signals transmitted by the mobile station UE and surrounding radio base stations # 11A / # 11B / # 12A / # 13A / # 13B.
　例えば、受信部１１は、移動局ＵＥから、「Ｍｅａｓｕｒｅｍｅｎｔ　Ｒｅｐｏｒｔ」を受信するように構成されていてもよい。 For example, the receiving unit 11 may be configured to receive “Measurement Report” from the mobile station UE.
　また、受信部１１は、周辺の無線基地局＃１１Ａ/＃１１Ｂ/＃１２Ａ/＃１３Ａ/＃１３Ｂから、「Ａｄｄｉｔｉｏｎａｌ　Ｃａｒｒｉｅｒ」が適用されているか否かについて示す情報等の設定情報を受信するように構成されていてもよい。 In addition, the receiving unit 11 receives setting information such as information indicating whether “Additional Carrier” is applied from the surrounding radio base stations # 11A / # 11B / # 12A / # 13A / # 13B. It may be configured.
　送信部１２は、移動局ＵＥや周辺の無線基地局＃１１Ａ/＃１１Ｂ/＃１２Ａ/＃１３Ａ/＃１３Ｂに対して各種信号を送信するように構成されている。 The transmission unit 12 is configured to transmit various signals to the mobile station UE and surrounding radio base stations # 11A / # 11B / # 12A / # 13A / # 13B.
　例えば、送信部１２は、移動局ＵＥに対して、「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」を含む「Ｍｅａｓｕｒｅｍｅｎｔ　Ｃｏｎｆｉｇｕｒａｔｉｏｎ」を含む「ＲＲＣ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」を送信するように構成されていてもよい。 For example, the transmission unit 12 may be configured to transmit “RRC Reconfiguration” including “Measurement Configuration” including “MeasObjectEUTRA” to the mobile station UE.
　また、送信部１２は、移動局ＵＥに対して、測定対象キャリアにおいて測定処理に用いるべき測定用信号を特定するための情報（具体的には、かかる測定用信号の構成を特定するための情報）を通知するように構成されていてもよい。 In addition, the transmission unit 12 specifies, for the mobile station UE, information for specifying a measurement signal to be used for measurement processing in the measurement target carrier (specifically, information for specifying the configuration of the measurement signal). ) May be configured to be notified.
　例えば、送信部１２は、移動局ＵＥに対して、セル＃１１Ａ/＃１１Ｂにおける測定処理に用いるべき測定用信号を特定するための情報を、それぞれ通知するように構成されていてもよい。 For example, the transmission unit 12 may be configured to notify the mobile station UE of information for specifying a measurement signal to be used for measurement processing in the cells # 11A / # 11B.
　具体的には、図３に示すように、送信部１２は、「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」内の「新規ａｄｄｉｔｉｏｎａｌ　ｃａｒｒｉｅｒ　ｍｅａｓｕｒｅｍｅｎｔ用の信号、若しくは、新規ａｄｄｉｔｉｏｎａｌ　ｃａｒｒｉｅｒ　ｍｅａｓｕｒｅｍｅｎｔ用の信号としてのＰｏｓｉｔｉｏｎｉｎｇ用Ｒｅｆｅｒｅｎｃｅ　ｓｉｇｎａｌ」によって、かかる測定用信号を特定するための情報（具体的には、かかる測定用信号の構成を特定するための情報）を通知するように構成されていてもよい。 Specifically, as illustrated in FIG. 3, the transmission unit 12 performs “positioning reference sign as a signal for a new addition carrier measurement or a signal for a new addition carrier measurement” in “MeasObjectEUTRA”. Information for specifying the measurement signal (specifically, information for specifying the configuration of the measurement signal) may be notified.
　ここで、かかる測定用信号として、ＰＲＳが用いられてもよい。かかる場合、送信部１２は、「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」内の「新規ａｄｄｉｔｉｏｎａｌ　ｃａｒｒｉｅｒ　ｍｅａｓｕｒｅｍｅｎｔ用の信号、若しくは、新規ａｄｄｉｔｉｏｎａｌ　ｃａｒｒｉｅｒ　ｍｅａｓｕｒｅｍｅｎｔ用の信号としてのＰｏｓｉｔｉｏｎｉｎｇ用Ｒｅｆｅｒｅｎｃｅ　ｓｉｇｎａｌ」に、セル＃１１Ａ/＃１１Ｂにおける測定処理に用いるべき測定用信号を特定するための情報として、図４に示す「ＰＲＳ-ｉｎｆｏ」を設定するように構成されていてもよい。 Here, PRS may be used as the measurement signal. In such a case, the transmission unit 12 performs the #new measurement signal for Positioning 11 in the cell # 11A / # in the “MeasObjectEUTRA” as a signal for a new addition carrier measurement or a signal for a new addition carrier measurement # 11A / # in the B11 measurement process in the cell # 11A. As information for specifying the measurement signal to be used, “PRS-info” shown in FIG. 4 may be set.
　また、かかる測定用信号として、ＰＲＳの代わりに、図５に示す第１信号が用いられてもよいし、図６に示す第２信号が用いられてもよい。 Also, as the measurement signal, the first signal shown in FIG. 5 may be used instead of the PRS, or the second signal shown in FIG. 6 may be used.
　例えば、図５に示すように、第１信号は、ＰＲＳを参照にして生成された６個の直交系列と、各直交系列のシンボルごとにサブキャリアをランダムにシフトすることによって生成されたＮ個の非直交系列とからなる。 For example, as illustrated in FIG. 5, the first signal includes N orthogonal signals generated by randomly shifting subcarriers for each orthogonal sequence symbol and 6 orthogonal sequences generated with reference to the PRS. Of non-orthogonal sequences.
　なお、図５に示すように、かかる非直交系列間においても、できるだけ衝突の少ないパターンが用いられることが好ましい。 In addition, as shown in FIG. 5, it is preferable to use a pattern with as few collisions as possible even between such non-orthogonal sequences.
　また、図６に示すように、第２信号は、サブキャリアをシフトする代わりに周波数方向の位相回転（時間領域における巡回シフト）を用いて生成された直交系列と、各直交系列のスクランブル符号を変更することによって生成された非直交系列とからなる。 In addition, as shown in FIG. 6, the second signal includes an orthogonal sequence generated using phase rotation in the frequency direction (cyclic shift in the time domain) instead of shifting subcarriers, and a scramble code of each orthogonal sequence. It consists of a non-orthogonal sequence generated by changing.
　上述のＰＲＳや第１信号や第２信号を構成する各系列には、識別情報が付与されており、送信部１２は、「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」内の「ＣｅｌｌＴｏＡｄｄＭｏｄＬｉｓｔ-ｒ１１」内の「新規ａｄｄｉｔｉｏｎａｌ　ｃａｒｒｉｅｒ　ｍｅａｓｕｒｅｍｅｎｔ用の信号、若しくは、新規ａｄｄｉｔｉｏｎａｌ　ｃａｒｒｉｅｒ　ｍｅａｓｕｒｅｍｅｎｔ用の信号としてのＰｏｓｉｔｉｏｎｉｎｇ用Ｒｅｆｅｒｅｎｃｅ　ｓｉｇｎａｌ」に、かかる識別情報を設定することによって、測定処理に用いるべきＣＲＳ以外の信号を特定するための情報（具体的には、かかる信号の構成を特定するための情報）を通知するように構成されていてもよい。 Identification information is given to each of the above-described PRS, the first signal, and the second signal, and the transmission unit 12 uses the “New additional carrier measurement” in “CellToAddModList-r11” in “MeasObjectEUTRA”. Information for specifying signals other than CRS to be used for measurement processing (specifically, by setting such identification information in the “reference signal for Positioning as a signal for a new additional carrier measurement signal”) it may be configured to notify the information) for identifying the structure of the signal.
　図７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. 7, 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によって送信される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 transmitted by the radio base station eNB.
　例えば、受信部２１は、無線基地局ｅＮＢから、「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」を含む「Ｍｅａｓｕｒｅｍｅｎｔ　Ｃｏｎｆｉｇｕｒａｔｉｏｎ」を含む「ＲＲＣ　Ｒｅｃｏｎｆｉｇｕｒａｔｉｏｎ」を受信するように構成されていてもよい。 For example, the receiving unit 21 may be configured to receive “RRC Reconfiguration” including “Measurement Configuration” including “MeasObjectEUTRA” from the radio base station eNB.
　例えば、受信部２１は、「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」内の「新規ａｄｄｉｔｉｏｎａｌ　ｃａｒｒｉｅｒ　ｍｅａｓｕｒｅｍｅｎｔ用の信号、若しくは、新規ａｄｄｉｔｉｏｎａｌ　ｃａｒｒｉｅｒ　ｍｅａｓｕｒｅｍｅｎｔ用の信号としてのＰｏｓｉｔｉｏｎｉｎｇ用Ｒｅｆｅｒｅｎｃｅ　ｓｉｇｎａｌ」から、セル＃１１Ａ/＃１１Ｂにおける測定処理に用いるべき測定用信号を特定するための情報（具体的には、かかる測定用信号の構成を特定するための情報）を取得するように構成されていてもよい。 For example, the reception unit 21 uses the “New addition carrier signal” signal in the “MeasObjectEUTRA” or the Positioning Reference signal as a signal for the new addition carrier measurement signal 11 in the measurement # 11A / # in the cell # 11A #. Information for specifying the power measurement signal (specifically, information for specifying the configuration of the signal for measurement) may be acquired.
　測定部２２は、受信部２１によって受信された「Ｍｅａｓｕｒｅｍｅｎｔ　Ｃｏｎｆｉｇｕｒａｔｉｏｎ」に応じて、測定処理を行うように構成されている。 The measurement unit 22 is configured to perform a measurement process in accordance with “Measurement Configuration” received by the reception unit 21.
　具体的には、測定部２２は、セル＃１１Ａ/＃１１Ｂにおける測定処理に用いるべき測定用信号を特定するための情報（具体的には、かかる測定用信号の構成を特定するための情報）に基づいて、上述の測定処理を行うように構成されていてもよい。 Specifically, the measurement unit 22 specifies information for specifying a measurement signal to be used for measurement processing in the cells # 11A / # 11B (specifically, information for specifying the configuration of the measurement signal). May be configured to perform the measurement process described above.
　送信部２３は、無線基地局ｅＮＢに対して、上述の測定結果を含む「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” including the above measurement result to the radio base station eNB.
　本実施形態に係る発明によれば、無線基地局ｅＮＢが、「ＭｅａｓＯｂｊｅｃｔＥＵＴＲＡ」内の「新規ａｄｄｉｔｉｏｎａｌ　ｃａｒｒｉｅｒ　ｍｅａｓｕｒｅｍｅｎｔ用の信号、若しくは、新規ａｄｄｉｔｉｏｎａｌ　ｃａｒｒｉｅｒ　ｍｅａｓｕｒｅｍｅｎｔ用の信号としてのＰｏｓｉｔｉｏｎｉｎｇ用Ｒｅｆｅｒｅｎｃｅ　ｓｉｇｎａｌ」によって、セル＃１１において「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある移動局ＵＥに対して、セル＃１１Ａ/＃１１Ｂにおける測定用信号を特定するための情報を通知することができるため、移動局ＵＥに対して、セル＃１１Ａ/＃１１Ｂを「Ｓｃｅｌｌ（Ｓｅｃｏｎｄａｒｙ　Ｃｅｌｌ）」として設定する前に、移動局ＵＥに、セル＃１１Ａ/＃１１Ｂにおける測定処理を行わせることができる。 According to the invention according to the present embodiment, the radio base station eNB uses the “Reference signal for Positioning” as a signal for “new addition carrier measurement” or a signal for new addition carrier measurement in “MeasObjectEUTRA”, 11, the mobile station UE in the “RRC_Connected state” can be notified of information for specifying the measurement signal in the cells # 11A / # 11B. Before setting # 11B as “Scell (Secondary Cell)”, the mobile station UE can perform measurement processing in the cells # 11A / # 11B. The
　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、セル＃１１（第１セル）と、セル＃１１のカバーエリア内に配置されているセル＃１１Ａ（第２セル）とを具備する移動通信システムにおける移動通信方法であって、無線基地局ｅＮＢ＃１が、セル＃１１において「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態（接続状態）」にある移動局ＵＥに対して、セル＃１１Ａにおいて測定処理に用いるべき測定用信号を特定するための情報を送信する工程と、移動局ＵＥが、受信した測定用信号を特定するための情報に基づいて、セル＃１１Ａにおける測定処理を行う工程とを有し、かかる測定用信号は、ＣＲＳ（セル特有の参照信号）以外の信号であることを要旨とする。 The first feature of the present embodiment is that mobile communication in a mobile communication system comprising a cell # 11 (first cell) and a cell # 11A (second cell) arranged in the cover area of the cell # 11. This is a method for the radio base station eNB # 1 to specify a measurement signal to be used for the measurement process in the cell # 11A for the mobile station UE in the “RRC_Connected state (connected state)” in the cell # 11. And the mobile station UE performs a measurement process in the cell # 11A based on the received information for specifying the measurement signal, and the measurement signal is a CRS ( The gist is that the signal is a signal other than a cell-specific reference signal.
　本実施形態の第２の特徴は、セル＃１１と、セル＃１１のカバーエリア内に配置されているセル＃１１Ａとを具備する移動通信システムにおいて、セル＃１１を管理する無線基地局ｅＮＢ＃１であって、セル＃１１において「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある移動局ＵＥに対して、セル＃１１Ａにおいて測定処理に用いるべき測定用信号を特定するための情報を送信するように構成されている送信部１２を具備し、かかる測定用信号は、ＣＲＳ以外の信号であることを要旨とする。 A second feature of the present embodiment is that a radio base station eNB # that manages the cell # 11 in a mobile communication system that includes the cell # 11 and the cell # 11A that is arranged in the cover area of the cell # 11. 1 is a transmission configured to transmit information for specifying a measurement signal to be used in the measurement process in the cell # 11A to the mobile station UE in the “RRC_Connected state” in the cell # 11. comprising a part 12, such measurement signal is summarized in that a signal other than CRS.
　本実施形態の第３の特徴は、セル＃１１と、セル＃１１のカバーエリア内に配置されているセル＃１１Ａとを具備する移動通信システムにおいて用いられる移動局ＵＥであって、セル＃１１において「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある場合に、セル＃１１を管理する無線基地局ｅＮＢ＃１から、セル＃１１Ａにおいて測定処理に用いるべき測定用信号を特定するための情報を取得するように構成されている受信部２１と、受信した測定用信号を特定するための情報に基づいて、セル＃１１Ａにおける測定処理を行うように構成されている測定部２２とを具備し、かかる測定用信号は、ＣＲＳ以外の信号であることを要旨とする。 A third feature of the present embodiment is a mobile station UE used in a mobile communication system that includes a cell # 11 and a cell # 11A arranged in the cover area of the cell # 11, and the cell # 11 In the “RRC_Connected state”, the radio base station eNB # 1 managing the cell # 11 is configured to acquire information for specifying a measurement signal to be used for the measurement process in the cell # 11A. And a measurement unit 22 configured to perform measurement processing in the cell # 11A based on the information for specifying the received measurement signal, and the measurement signal is a CRS. The gist is that it is a signal other than.
　なお、上述の移動局ＵＥや無線基地局ｅＮＢの動作は、ハードウェアによって実施されてもよいし、プロセッサによって実行されるソフトウェアモジュールによって実施されてもよいし、両者の組み合わせによって実施されてもよい。 The operations of the mobile station UE and the radio base station eNB 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。 Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in 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、移動局ＵＥや無線基地局ｅＮＢ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移動局ＵＥや無線基地局ｅＮＢ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 mobile station UE or the radio base station eNB. Further, the storage medium and the processor may be provided as a discrete component in the mobile station UE or the radio base station eNB.
　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 this 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２０１２－０１７３６９号（２０１２年１月３０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 content of Japanese Patent Application No. 2012-017369 (filed on January 30, 2012) is incorporated herein by reference.
　以上説明したように、本発明によれば、「Ａｄｄｉｔｉｏｎａｌ　Ｃａｒｒｉｅｒ」が適用されている場合であっても、適切に測定処理を行うことができる移動通信方法、無線基地局及び移動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 communication method, a radio base station, and a mobile station that can appropriately perform measurement processing even when “Additional Carrier” is applied. Can do.
ＵＥ…移動局
ｅＮＢ…無線基地局
１１、２１…受信部
１２、２３…送信部
２２…測定部 UE ... mobile station eNB ... radio base station 11, 21 ... receiver 12, 23 ... transmitter 22 ... measuring unit

Claims (3)

  1. 　第１セルと、該第１セルのカバーエリア内に配置されている第２セルとを具備する移動通信システムにおける移動通信方法であって、
    　無線基地局が、前記第１セルにおいて接続状態にある移動局に対して、前記第２セルにおいて測定処理に用いるべき測定用信号を特定するための情報を送信する工程と、
    　前記移動局が、前記測定用信号を特定するための情報に基づいて、前記第２セルにおける測定処理を行う工程とを有し、
    　前記測定用信号は、セル特有の参照信号以外の信号であることを特徴とする移動通信方法。     A mobile communication method in a mobile communication system comprising a first cell and a second cell arranged in a cover area of the first cell,
    A step in which a radio base station transmits information for specifying a measurement signal to be used for measurement processing in the second cell to a mobile station connected in the first cell;
    The mobile station has a step of performing measurement processing in the second cell based on information for specifying the measurement signal;
    The mobile communication method, wherein the measurement signal is a signal other than a cell-specific reference signal.
  2. 　第１セルと、該第１セルのカバーエリア内に配置されている第２セルとを具備する移動通信システムにおいて、該第１セルを管理する無線基地局であって、
    　前記第１セルにおいて接続状態にある移動局に対して、前記第２セルにおいて測定処理に用いるべき測定用信号を特定するための情報を送信するように構成されている送信部を具備し、
    　前記測定用信号は、セル特有の参照信号以外の信号であることを特徴とする無線基地局。     In a mobile communication system comprising a first cell and a second cell arranged in the coverage area of the first cell, a radio base station that manages the first cell,
    A transmitter configured to transmit information for specifying a measurement signal to be used for measurement processing in the second cell to a mobile station connected in the first cell;
    The radio base station, wherein the measurement signal is a signal other than a cell-specific reference signal.
  3. 　第１セルと、該第１セルのカバーエリア内に配置されている第２セルとを具備する移動通信システムにおいて用いられる移動局であって、
    　前記第１セルにおいて接続状態にある場合に、該第１セルを管理する無線基地局から、前記第２セルにおいて測定処理に用いるべき測定用信号を特定するための情報を取得するように構成されている受信部と、
    　前記測定用信号を特定するための情報に基づいて、前記第２セルにおける測定処理を行うように構成されている測定部とを具備し、
    　前記測定用信号は、セル特有の参照信号以外の信号であることを特徴とする移動局。     A mobile station used in a mobile communication system comprising a first cell and a second cell arranged in a coverage area of the first cell,
    When the first cell is in a connected state, it is configured to acquire information for specifying a measurement signal to be used for measurement processing in the second cell from a radio base station that manages the first cell. A receiving unit,
    A measurement unit configured to perform measurement processing in the second cell based on the information for specifying the measurement signal; and
    The mobile station characterized in that the measurement signal is a signal other than a cell-specific reference signal.
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