JP2011049859A - Base station device and management server - Google Patents

Base station device and management server Download PDF

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JP2011049859A
JP2011049859A JP2009196985A JP2009196985A JP2011049859A JP 2011049859 A JP2011049859 A JP 2011049859A JP 2009196985 A JP2009196985 A JP 2009196985A JP 2009196985 A JP2009196985 A JP 2009196985A JP 2011049859 A JP2011049859 A JP 2011049859A
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base station
wireless communication
communication terminal
area
management server
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JP5498097B2 (en
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Hiromasa Matsumoto
浩征 松本
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Kyocera Corp
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Kyocera Corp
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Priority to US13/392,062 priority patent/US8699463B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base station device which allows efficient power consumption in comparison with conventional devices. <P>SOLUTION: A management server 40 determines whether a wireless communication terminal 30 being communicating with a macrocell base station exists in the neighborhood of a femtocell base station 10a, on the basis of information of a UATI update notification obtained from the macrocell base station, and if the wireless communication terminal 30 exists there, the server notifies the femtocell base station 10a that the wireless communication terminal 30 exists there. If the wireless communication terminal 30 being a target of accommodation doesn't exist in the neighborhood of the femtocell base station 10a, the femtocell base station 10a stops radio wave transmission to the wireless communication terminal 30, and radio wave reception from the wireless communication terminal 30 and, when being notified by the management server 40 that the wireless communication terminal 30 exists in the neighborhood of the femtocell base station 10a, starts radio wave reception from the wireless communication terminal 30. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、狭域のエリア内で無線通信端末と通信する基地局装置および管理サーバに関する。   The present invention relates to a base station apparatus and a management server that communicate with a wireless communication terminal in a narrow area.

近年、無線通信システムにおいて、フェムトセル（Femtocell）と呼ばれる、従来よりごく小さい範囲をカバーする基地局の方式が提案されている。従来の携帯電話のセル、つまり１つの基地局でカバーする範囲は半径１ｋｍ〜数ｋｍ程度あるが、フェムトセルでカバーされるのは、たとえば家の中や小さなオフィスなど、せいぜい１０ｍ程度のエリアである。フェムトセルは、サービス範囲をピンポイントに提供することが可能であることや、設置が個人でも可能になる点で、今後普及が進むと思われる。   In recent years, in wireless communication systems, a base station system called a femtocell, which covers a much smaller range than before, has been proposed. A conventional cell phone cell, that is, a range covered by one base station has a radius of about 1 km to several km, but a femto cell covers an area of about 10 m at most, such as in a house or a small office. is there. Femtocells are expected to become more popular in the future because they can provide a service range pinpoint and can be installed by individuals.

ここで、マクロセルとフェムトセルを有する従来の無線通信システムについて図１６、図１７を参照して説明する。   Here, the conventional radio | wireless communications system which has a macrocell and a femtocell is demonstrated with reference to FIG. 16, FIG.

図１６、図１７に示した従来の無線通信システムは、それぞれフェムトセル９ａ、９ｂをカバーするフェムトセル基地局９０ａ、９０ｂ、それぞれのフェムトセルを含むマクロセル８をカバーするマクロセル基地局２０、および、マクロセル基地局２０に接続されている「ＣＤＭＡ２０００ １ｘＥＶ−ＤＯ」に準拠した無線通信ネットワーク２６を有している。   16 and 17, the conventional radio communication system includes femtocell base stations 90a and 90b that cover femtocells 9a and 9b, a macrocell base station 20 that covers a macrocell 8 including the respective femtocells, and A wireless communication network 26 compliant with “CDMA2000 1xEV-DO” connected to the macrocell base station 20 is provided.

さらに、図１６、図１７に示した従来の無線通信システムは、フェムトセル基地局９０ａ、９０ｂとそれぞれ接続するルータ２３、２２、これらルータと接続する公衆網９２、公衆網９２および無線通信ネットワーク２６と接続するゲートウェイ２４、および、ゲートウェイ２４と接続する管理サーバ９１を有している。管理サーバ９１は、ＯＡＭ（Operation And Maintenance）機能を有しており、例えば、フェムトセル９ａ、９ｂおよびフェムトセル基地局９０ａ、９０ｂに関する情報を管理している。   Further, the conventional wireless communication system shown in FIGS. 16 and 17 includes routers 23 and 22 connected to femtocell base stations 90a and 90b, a public network 92, a public network 92, and a wireless communication network 26 connected to these routers, respectively. And a management server 91 connected to the gateway 24. The management server 91 has an OAM (Operation And Maintenance) function, and manages information related to the femtocells 9a and 9b and the femtocell base stations 90a and 90b, for example.

また、無線通信端末３０は、フェムトセル基地局９０ａとの通信を許可されている。フェムトセル基地局９０ａは、無線通信端末３０と通信を行っているとき、（１）無線通信端末３０がフェムトセル９ａの圏外に出て、（２）マクロセル基地局２０にハンドオフしたとする。フェムトセル９ａの圏内には通信を許可されている端末が１台も無いが、（３）フェムトセル基地局９０ａの電波の送信は行われ続ける。   Further, the wireless communication terminal 30 is permitted to communicate with the femtocell base station 90a. When the femtocell base station 90a is communicating with the wireless communication terminal 30, it is assumed that (1) the wireless communication terminal 30 goes out of the range of the femtocell 9a and (2) handoffs to the macrocell base station 20. Although there is no terminal permitted to communicate within the femtocell 9a, (3) transmission of radio waves from the femtocell base station 90a continues.

例えば、無線通信端末３０の利用者が昼間、や仕事や学校に出かけていて、フェムトセル基地局９０ａが設置されている家には利用者が誰もいないという状況において、フェムトセル基地局９０ａの電波の送信は行われ続けることがあり、この状況で、フェムトセル基地局９０ａが許可された無線通信端末３０に対して電波を送信し続けるのは、電力の無駄であると言える。   For example, in a situation where a user of the wireless communication terminal 30 goes out to work or school in the daytime and there is no user in a house where the femtocell base station 90a is installed, the femtocell base station 90a Radio waves may continue to be transmitted, and in this situation, it can be said that it is a waste of power to continue transmitting radio waves to the wireless communication terminal 30 that the femtocell base station 90a is permitted.

このような課題に対し、特許文献１には、一定時間内に通信がない場合には、基地局の送信機能を停止し、この間に無線通信端末が発呼する場合は、無線通信端末が基地局に対して送信起動要求信号を送信し、基地局が、この信号を受信して送信機能を再起動して無線通信端末との通信を可能にすることで、送信機能を停止させた分、消費電力を低減するものが提案されている。   In response to such a problem, in Patent Document 1, when there is no communication within a certain time, the transmission function of the base station is stopped, and when the wireless communication terminal makes a call during this period, the wireless communication terminal By transmitting a transmission activation request signal to the station, the base station receives this signal, restarts the transmission function and enables communication with the wireless communication terminal, thereby stopping the transmission function, Some have been proposed that reduce power consumption.

特開２００２−１５２１２９号公報JP 2002-152129 A

上述した特許文献１に開示された技術は、基地局の消費電力を低減するために、一定時間内に通信がない場合に、基地局の送信機能を停止するものであるが、基地局の消費電力をさらに低減するためには、送信機能を停止するとともに受信機能も停止することが好ましい。しかしながら、受信機能も停止すると、無線通信端末からの送信起動要求信号を受信することができなって、送信機能を再起動することができなくなるため、受信機能を停止して消費電力を低減することはできなかった。   The technique disclosed in Patent Document 1 described above is to stop the transmission function of the base station when there is no communication within a certain time in order to reduce the power consumption of the base station. In order to further reduce the power, it is preferable to stop the transmission function and the reception function. However, if the reception function is also stopped, the transmission start request signal from the wireless communication terminal can be received, and the transmission function cannot be restarted. Therefore, the reception function is stopped to reduce power consumption. I couldn't.

本発明は、このような問題点に鑑みてなされたものであり、本発明の目的は、従来と比較して効率的な電力消費を行うことができる基地局装置および管理サーバを提供することにある。   The present invention has been made in view of such problems, and an object of the present invention is to provide a base station apparatus and a management server that can perform more efficient power consumption than conventional ones. is there.

上記目的を達成するため、本発明は、広域基地局と通信可能な広域エリア内にある狭域エリアで通信可能とする狭域基地局を管理する管理サーバにおいて、無線通信端末と、該無線通信端末を収容する前記狭域基地局との対応関係を管理する制御部と、前記広域基地局および前記狭域基地局と通信する有線通信部と、前記広域基地局と通信している前記無線通信端末が、前記狭域基地局と同じ無線エリア情報のエリア内にいるか否かを、前記広域基地局から得た無線エリア情報に基づいて判定する判定部とを備え、前記判定部が、前記無線通信端末が前記狭域基地局と同じ無線エリア情報のエリア内にいると判定した場合は、前記制御部が、前記狭域基地局が前記無線通信端末からの電波の受信を開始するように、前記狭域基地局に、前記無線通信端末が前記狭域基地局と同じ無線エリア情報のエリア内にいることを通知することを特徴とする。   In order to achieve the above object, the present invention provides a management server for managing a narrow area base station capable of communicating in a narrow area within a wide area capable of communicating with a wide area base station, a wireless communication terminal, and the wireless communication A control unit that manages a correspondence relationship with the narrow area base station that accommodates a terminal; a wired communication unit that communicates with the wide area base station and the narrow area base station; and the wireless communication that is in communication with the wide area base station A determination unit that determines whether or not the terminal is in the same wireless area information area as the narrow area base station based on the wireless area information obtained from the wide area base station, and the determination unit includes the radio When it is determined that the communication terminal is in the same area of the wireless area information as the narrow area base station, the control unit, so that the narrow area base station starts receiving radio waves from the wireless communication terminal, The narrow base station Communication terminal and notifies that you are in the area of the same wireless area information and the narrow-area base station.

前記判定部は、複数の狭域基地局の収容対象となっている無線通信端末を、前記狭域基地局と同じ無線エリア情報のエリア内にいると判定することが好ましい。   It is preferable that the determination unit determines that the wireless communication terminal that is to be accommodated by a plurality of narrow area base stations is in the same area of the wireless area information as the narrow area base station.

また、前記制御部は、前記無線通信端末の位置登録の際に、前記無線エリア情報を、前記広域基地局から、前記有線通信部を介して取得することが好ましい。   Moreover, it is preferable that the said control part acquires the said wireless area information from the said wide area base station via the said wired communication part at the time of the position registration of the said wireless communication terminal.

また、本発明は、広域基地局と通信可能な広域エリア内にある狭域エリアで通信可能な狭域基地局を構成する基地局装置において、収容対象となっている無線通信端末からの電波を受信する無線通信受信部と、前記無線通信受信部による電波の受信を制御する制御部と、自基地局を管理する管理サーバと通信する有線通信部とを備え、前記制御部が、収容対象となっている全ての無線通信端末が位置登録されていない場合、前記無線通信受信部に対し電波の受信を停止させ、前記無線通信端末が自基地局と同じ無線エリア情報のエリア内にいることを前記管理サーバから前記有線通信部介して通知された場合は、前記無線通信受信部に対し前記無線通信端末からの電波の受信を開始させることを特徴とする。   In addition, the present invention provides a base station device that constitutes a narrow base station that can communicate in a narrow area within a wide area that can communicate with a wide base station. A wireless communication receiving unit for receiving, a control unit for controlling reception of radio waves by the wireless communication receiving unit, and a wired communication unit for communicating with a management server for managing the base station, wherein the control unit If all the wireless communication terminals are not registered in location, the wireless communication receiving unit stops receiving radio waves, and the wireless communication terminal is in the same area of the wireless area information as the own base station. When notified from the management server via the wired communication unit, the wireless communication receiving unit is caused to start receiving radio waves from the wireless communication terminal.

前記制御部は、前記無線通信端末が自基地局と同じ無線エリア情報のエリア内にいないことを前記管理サーバから前記有線通信部介して通知された場合は、前記無線通信受信部に対し前記無線通信端末からの電波の受信を停止させることが好ましい。   The control unit, when notified from the management server via the wired communication unit that the wireless communication terminal is not in the same area of the wireless area information as the base station, the wireless communication receiving unit It is preferable to stop reception of radio waves from the communication terminal.

本発明によれば、フェムトセル基地局は、無線通信端末がフェムトセルに近づいたときに無線通信端末の送信波の監視を開始するため、無線通信端末がフェムトセルの遠隔地にいるときでも送信波の監視を行っている場合よりも、効率的な電力消費を行うことができる。   According to the present invention, since the femtocell base station starts monitoring the transmission wave of the radio communication terminal when the radio communication terminal approaches the femtocell, transmission is performed even when the radio communication terminal is at a remote location of the femtocell. More efficient power consumption can be achieved than when monitoring waves.

本発明の実施例に係る無線通信システムの構成図である。It is a block diagram of the radio | wireless communications system based on the Example of this invention. フェムトセル基地局のブロック図である。It is a block diagram of a femtocell base station. 管理サーバのブロック図である。It is a block diagram of a management server. フェムトセル基地局の状態遷移を説明する図である。It is a figure explaining the state transition of a femtocell base station. フェムトセル基地局が準備フェーズのときのシーケンス図である。It is a sequence diagram when a femtocell base station is in a preparation phase. フェムトセル基地局が待受けフェーズのときの無線通信システムの動作について説明する図である。It is a figure explaining operation | movement of the radio | wireless communications system when a femtocell base station is in a standby phase. フェムトセル基地局が待受けフェーズのときのシーケンス図である。It is a sequence diagram when a femtocell base station is in a standby phase. ＵＡＴＩ更新通知の情報を示す図である。It is a figure which shows the information of a UATI update notification. ＵＡＴＩ取得通知（近隣）の情報を示す図である。It is a figure which shows the information of UATI acquisition notification (neighborhood). ＵＡＴＩ取得通知（遠方）の情報を示す図である。It is a figure which shows the information of a UATI acquisition notification (far). フェムトセル基地局が監視フェーズのときの無線通信システムの動作について説明する図である。It is a figure explaining operation | movement of the radio | wireless communications system when a femtocell base station is a monitoring phase. フェムトセル基地局が監視フェーズのときのシーケンス図である。It is a sequence diagram when a femtocell base station is in a monitoring phase. ＵＡＴＩ取得通知（遠方）を受信した場合のシーケンス図である。It is a sequence diagram at the time of receiving UATI acquisition notification (far). ＭＩの例を示す図である。It is a figure which shows the example of MI. ＭＱの例を示す図である。It is a figure which shows the example of MQ. 従来の無線通信システムの構成図である。It is a block diagram of the conventional radio | wireless communications system. 従来の無線通信システムの構成図である。It is a block diagram of the conventional radio | wireless communications system.

本発明の実施の形態について図面を参照して説明する。図１は、本発明の実施例に係る無線通信システムの構成図である。図１に示した無線通信システムは、フェムトセル９ａ、９ｂそれぞれをカバーするフェムトセル基地局（狭域基地局）１０ａ、１０ｂ、フェムトセル９ａ、９ｂ（狭域エリア）を含むマクロセル８（広域エリア）をカバーするマクロセル基地局（広域基地局）２０、および、マクロセル基地局２０に接続されている無線通信ネットワーク２６を有している。本実施例では、無線通信ネットワーク２６は、「ＣＤＭＡ２０００ １ｘＥＶ−ＤＯ」に準拠している。なお、フェムトセル基地局のそれぞれを区別する場合には、フェムトセル基地局１０ａ、１０ｂと記載し、フェムトセル基地局のそれぞれを区別しない場合には、フェムトセル基地局１０と記載する。   Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a wireless communication system according to an embodiment of the present invention. The radio communication system shown in FIG. 1 includes a macro cell 8 (wide area) including femto cell base stations (narrow area base stations) 10a and 10b and femto cells 9a and 9b (narrow area) covering the femto cells 9a and 9b. ) And a wireless communication network 26 connected to the macrocell base station 20. In this embodiment, the wireless communication network 26 conforms to “CDMA2000 1xEV-DO”. In addition, when distinguishing each femtocell base station, it describes as femtocell base station 10a, 10b, and when not distinguishing each femtocell base station, it describes as femtocell base station 10.

さらに、図１に示した無線通信システムは、フェムトセル基地局１０ａ、１０ｂとそれぞれ接続するルータ２３、２２、ルータ２３、２２と接続するフェムトセル利用者契約回線２５、フェムトセル利用者契約回線２５および無線通信ネットワーク２６と接続するゲートウェイ２４、および、ゲートウェイ２４と接続する管理サーバ４０を有している。管理サーバ４０は、ＯＡＭ（Operation And Maintenance）機能を有しており、例えば、フェムトセル９ａ、９ｂおよびフェムトセル基地局１０ａ、１０ｂに関する情報を管理している。
また、無線通信端末３０は、フェムトセル基地局１０ａとの通信を許可されてフェムトセル基地局１０ａの収容対象となっている。 Further, the wireless communication system shown in FIG. 1 includes routers 23 and 22 connected to the femtocell base stations 10a and 10b, femtocell user contracted lines 25 and femtocell user contracted lines 25 connected to the routers 23 and 22, respectively. And a gateway 24 connected to the wireless communication network 26 and a management server 40 connected to the gateway 24. The management server 40 has an OAM (Operation And Maintenance) function, and manages, for example, information about the femtocells 9a and 9b and the femtocell base stations 10a and 10b.
In addition, the wireless communication terminal 30 is permitted to communicate with the femtocell base station 10a and is an accommodation target of the femtocell base station 10a.

図２は、フェムトセル基地局のブロック図である。フェムトセル基地局１０は、無線通信送信部１１と、無線通信受信部１２と、マクロセル監視部１３と、有線通信部１４と、記憶部１５と、制御部１６によって構成されている。無線通信送信部１１は、収容対象となっている無線通信端末に電波を送信する。無線通信受信部１２は、収容対象となっている無線通信端末からの電波を受信する。有線通信部１４は、管理サーバ４０と通信する。マクロセル監視部１３は、フェムトセル基地局１０の周辺にあるマクロセル基地局２０を監視してマクロセル基地局２０に関する周辺基地局情報を取得する。
記憶部１５は、フラッシュメモリーやハードディスクなどの記憶媒体などによって構成されており、制御部１６は、ＣＰＵなどによって構成されている。 FIG. 2 is a block diagram of the femtocell base station. The femtocell base station 10 includes a wireless communication transmitting unit 11, a wireless communication receiving unit 12, a macro cell monitoring unit 13, a wired communication unit 14, a storage unit 15, and a control unit 16. The wireless communication transmission unit 11 transmits radio waves to the wireless communication terminal that is the accommodation target. The wireless communication receiving unit 12 receives radio waves from a wireless communication terminal that is an accommodation target. The wired communication unit 14 communicates with the management server 40. The macro cell monitoring unit 13 monitors the macro cell base stations 20 around the femto cell base station 10 and acquires peripheral base station information related to the macro cell base station 20.
The storage unit 15 is configured by a storage medium such as a flash memory or a hard disk, and the control unit 16 is configured by a CPU or the like.

制御部１６は、収容対象となっている無線通信端末の識別情報（ＥＳＮ等）を記憶部１５に予め登録する。また、制御部１６は、自己のフェムトセル基地局１０の周辺にあるマクロセル基地局２０に関する周辺基地局情報および無線通信端末３０の識別情報（ＥＳＮ等）を管理サーバ４０に通知する。   The control unit 16 registers in advance the identification information (such as ESN) of the wireless communication terminal that is the accommodation target in the storage unit 15. Further, the control unit 16 notifies the management server 40 of neighboring base station information related to the macro cell base station 20 around the femtocell base station 10 and identification information (ESN and the like) of the wireless communication terminal 30.

制御部１６は、無線通信送信部１１による電波の送信と、無線通信受信部１２による電波の監視を制御する。
また、制御部１６は、収容対象となっている全ての無線通信端末が位置登録されていない場合、無線通信送信部１１に対し電波の送信を停止させると共に無線通信受信部１２に対し電波の監視を停止させ、無線通信端末がフェムトセル基地局１０と同じ無線エリア情報のエリア内にいることを基地局を管理する管理サーバ４０から通知された場合は、無線通信受信部１２に対し無線通信端末からの電波の監視を開始させる。 The control unit 16 controls transmission of radio waves by the wireless communication transmission unit 11 and monitoring of radio waves by the wireless communication reception unit 12.
Further, the control unit 16 stops the radio communication transmission unit 11 from transmitting radio waves and monitors the radio communication reception unit 12 for radio waves when the location registration of all the radio communication terminals to be accommodated is not registered. When the management server 40 that manages the base station is notified that the wireless communication terminal is in the same wireless area information area as the femtocell base station 10, the wireless communication receiving unit 12 is notified of the wireless communication terminal 12. Start monitoring radio waves from.

図３は、管理サーバのブロック図である。管理サーバ４０は、ＵＡＴＩ（Unicast Access terminal identifier）判定部４３と、有線通信部４４と、記憶部４５と、制御部４６によって構成されている。ＵＡＴＩ判定部４３は、マクロセル基地局２０と通信している無線通信端末３０がフェムトセル基地局１０と同じ無線エリア情報のエリア内にいるか否かを、マクロセル基地局２０から得た無線エリア情報に基づいて判定する。有線通信部４４は、マクロセル基地局２０およびフェムトセル基地局１０と通信する。記憶部４５は、ハードディスクまたはフラッシュメモリーなどの記憶媒体などによって構成されており、制御部４６は、ＣＰＵなどによって構成されている。   FIG. 3 is a block diagram of the management server. The management server 40 includes a UATI (Unicast Access terminal identifier) determination unit 43, a wired communication unit 44, a storage unit 45, and a control unit 46. The UATI determination unit 43 uses the radio area information obtained from the macro cell base station 20 to determine whether or not the radio communication terminal 30 communicating with the macro cell base station 20 is in the same radio area information area as the femto cell base station 10. Judgment based on. The wired communication unit 44 communicates with the macrocell base station 20 and the femtocell base station 10. The storage unit 45 is configured by a storage medium such as a hard disk or a flash memory, and the control unit 46 is configured by a CPU or the like.

次に、本発明の実施の形態に係るフェムトセル基地局の動作について説明する。図４は、本発明の実施の形態に係るフェムトセル基地局の状態遷移を説明する図である。図４に示すように、本発明の実施の形態に係るフェムトセル基地局の動作については、準備フェーズ、待受けフェーズ、監視フェーズ、基地局動作フェーズの４つに分けられる。   Next, the operation of the femtocell base station according to the embodiment of the present invention will be described. FIG. 4 is a diagram illustrating state transition of the femtocell base station according to the embodiment of the present invention. As shown in FIG. 4, the operation of the femtocell base station according to the embodiment of the present invention is divided into four phases: a preparation phase, a standby phase, a monitoring phase, and a base station operation phase.

＜準備フェーズ＞
図１は、フェムトセル基地局が準備フェーズのときの無線通信システムの動作について説明する図である。図１に示すように、フェムトセル基地局１０ａは、フェムトセル基地局１０ａの周辺にあるマクロセル基地局２０の周辺基地局情報を取得する。また、フェムトセル基地局１０ａは、フェムトセル基地局１０ａとの通信が許可された無線通信端末３０の識別情報（ＥＳＮ等）を登録する。また、フェムトセル基地局１０ａは、周辺基地局情報および無線通信端末３０の識別情報（ＥＳＮ等）を管理サーバ４０に通知する。 <Preparation phase>
FIG. 1 is a diagram for explaining the operation of the wireless communication system when the femtocell base station is in the preparation phase. As shown in FIG. 1, the femtocell base station 10a acquires the peripheral base station information of the macrocell base station 20 around the femtocell base station 10a. Further, the femtocell base station 10a registers identification information (ESN or the like) of the wireless communication terminal 30 that is permitted to communicate with the femtocell base station 10a. In addition, the femtocell base station 10a notifies the management server 40 of the neighboring base station information and the identification information (ESN or the like) of the wireless communication terminal 30.

次に、フェムトセル基地局が準備フェーズのときの動作の詳細をシーケンス図として図５に示す。
フェムトセル基地局１０ａは、フェムトセル登録情報を管理サーバ４０に登録する（Ｓ１０１）。サーバ４０へ登録するフェムトセル登録情報は、フェムトセル基地局１０ａの識別情報、ＩＰアドレスである。 Next, details of the operation when the femtocell base station is in the preparation phase are shown in FIG. 5 as a sequence diagram.
The femtocell base station 10a registers the femtocell registration information in the management server 40 (S101). The femtocell registration information registered in the server 40 is identification information and an IP address of the femtocell base station 10a.

フェムトセル基地局１０ａは、フェムトセル基地局１０ａが備えるマクロセル基地局や周辺のフェムトセル基地局を監視する機能により、フェムトセル基地局１０ａの周辺にあるマクロセル基地局や周辺のフェムトセル基地局の報知情報を取得し（Ｓ１０２）、取得した周辺基地局の報知情報を管理サーバ４０に通知する（Ｓ１０３）。管理サーバ４０が周辺基地局から周辺基地局の報知情報を取得し、フェムトセル基地局１０ａが管理サーバ４０から周辺基地局の報知情報を取得するようにしても良い。報知情報は、具体例として、監視に必要なBandClass、Channel、PNであり、復調に必要なColorCode、SectorIDである。なお、フェムトセル基地局１０は、ＧＰＳやＮＴＰにより周辺にあるマクロセル基地局２０と時間同期を行っており、復調する際に同期をとっている。   The femtocell base station 10a has a function of monitoring the macrocell base station included in the femtocell base station 10a and the surrounding femtocell base stations, thereby enabling the macrocell base station and the surrounding femtocell base stations around the femtocell base station 10a to Broadcast information is acquired (S102), and the broadcast information of the acquired neighboring base stations is notified to the management server 40 (S103). The management server 40 may acquire the notification information of the peripheral base station from the peripheral base station, and the femtocell base station 10a may acquire the notification information of the peripheral base station from the management server 40. The broadcast information is, as a specific example, BandClass, Channel, and PN necessary for monitoring, and ColorCode and SectorID necessary for demodulation. Note that the femtocell base station 10 is time-synchronized with the macro cell base station 20 in the vicinity by GPS or NTP, and is synchronized when demodulating.

フェムトセル基地局１０ａは、許可された無線通信端末３０の識別情報（ＥＳＮ等）を無線通信端末３０から取得し、取得したものを登録する（Ｓ１０４）。ここで、無線通信端末３０は、フェムトセル基地局１０ａの収容対象となる。なお、無線通信端末３０は、フェムトセル基地局１０ａ、１０ｂそれぞれに収容対象になっていてもよい。さらに、フェムトセル基地局１０ａは、登録された無線通信端末３０の識別情報（ＥＳＮ等）を管理サーバ４０に登録する（Ｓ１０５）。このとき管理サーバ４０にて、無線通信端末３０の識別情報とフェムトセル基地局１０ａとの対応付けがなされる。   The femtocell base station 10a acquires identification information (such as ESN) of the permitted wireless communication terminal 30 from the wireless communication terminal 30, and registers the acquired information (S104). Here, the radio communication terminal 30 is an accommodation target of the femtocell base station 10a. Note that the wireless communication terminal 30 may be an accommodation target in each of the femtocell base stations 10a and 10b. Further, the femtocell base station 10a registers the registered identification information (such as ESN) of the wireless communication terminal 30 in the management server 40 (S105). At this time, the management server 40 associates the identification information of the wireless communication terminal 30 with the femtocell base station 10a.

＜待受けフェーズ＞
図６は、フェムトセル基地局が待受けフェーズのときの無線通信システムの動作について説明する図である。待受けフェーズの段階では、フェムトセル基地局１０ａは、無線通信送信部１１と無線通信受信部１２を停止させ、有線通信部１４を起動させてＵＡＴＩ取得通知を待つ状態となっている。 <Standby phase>
FIG. 6 is a diagram for explaining the operation of the wireless communication system when the femtocell base station is in the standby phase. At the stage of the standby phase, the femtocell base station 10a is in a state in which the wireless communication transmitting unit 11 and the wireless communication receiving unit 12 are stopped and the wired communication unit 14 is activated to wait for a UATI acquisition notification.

管理サーバ４０は、無線通信端末３０が取得したＵＡＴＩ（Unicast Access terminal identifier）の情報を、マクロセル基地局や周辺のフェムトセル基地局の所属する無線通信ネットワーク２６からの通知、または、無線通信ネットワーク２６への取得要求により取得すると、無線通信端末３０の識別情報（ＥＳＮ）を基に無線通信端末３０の登録されているフェムトセル基地局１０ａを割り出し、フェムトセル基地局１０ａへＵＡＴＩを送信する。   The management server 40 notifies the UATI (Unicast Access terminal identifier) information acquired by the wireless communication terminal 30 from the wireless communication network 26 to which the macrocell base station and the surrounding femtocell base stations belong, or the wireless communication network 26. When the acquisition request is received, the femtocell base station 10a registered in the wireless communication terminal 30 is determined based on the identification information (ESN) of the wireless communication terminal 30, and the UATI is transmitted to the femtocell base station 10a.

次に、フェムトセル基地局が待受けフェーズのときの動作の詳細をシーケンス図として図７に示す。
マクロセル基地局は、無線通信端末３０がマクロセル基地局からＵＡＴＩを取得し（Ｓ２０１）、無線通信端末３０とのＥＶ−ＤＯセッションがあるとき（Ｓ２０２でＹｅｓの場合）、またはＥＶ−ＤＯセッションの取得要求があり（Ｓ２０４）、無線通信端末３０とのＥＶ−ＤＯセッション取得に成功したとき（Ｓ２０５でＹｅｓの場合）は、無線通信ネットワーク２６経由で管理サーバ４０へＵＡＴＩの更新通知を行う（Ｓ２０３、Ｓ２０６）。なお、ステップＳ２０１〜Ｓ２０３の動作は、ハンドオフ中の位置登録に関わる動作等、ステップＳ２０４〜Ｓ２０６の動作は、位置登録に関わる動作等を想定している。図８は、ＵＡＴＩ更新通知の情報を示しており、ＵＡＴＩ更新通知には、マクロセル基地局の基地局情報、ColorCode、SectorID、無線通信端末３０の識別情報（ＥＳＮ等）、ＵＡＴＩが含まれる。 Next, details of the operation when the femtocell base station is in the standby phase are shown in FIG. 7 as a sequence diagram.
The macro cell base station acquires the UATI from the macro cell base station when the radio communication terminal 30 is present (S201), and when there is an EV-DO session with the radio communication terminal 30 (Yes in S202), or obtains an EV-DO session. When there is a request (S204) and the EV-DO session acquisition with the wireless communication terminal 30 is successful (Yes in S205), a UATI update notification is sent to the management server 40 via the wireless communication network 26 (S203, S206). The operations in steps S201 to S203 are assumed to be operations related to location registration during handoff, and the operations in steps S204 to S206 are assumed to be operations related to location registration. FIG. 8 shows information on the UATI update notification, and the UATI update notification includes base station information of the macro cell base station, ColorCode, SectorID, identification information (such as ESN) of the wireless communication terminal 30, and UATI.

管理サーバ４０は、無線通信端末３０の識別情報（ＥＳＮ）を基に無線通信端末３０の登録されているフェムトセル基地局１０ａを割り出す（Ｓ２０７）。フェムトセル基地局１０ａが割り出された場合（Ｓ２０８でＹｅｓの場合）、通信エリアを識別可能なColorCode（無線エリア情報）に基づいて、割り出されたフェムトセル基地局の付近にあるマクロセル基地局や周辺のフェムトセル基地局から取得されたＵＡＴＩであることが分かった場合（Ｓ２０９でＹｅｓの場合）、割り出されたフェムトセル基地局へ、ＵＡＴＩ取得通知（近隣）を行う。例えば、管理サーバ４０は、予めフェムトセル基地局それぞれのColorCode（例えば、上述の報知情報から取得）を有しており、ＵＡＴＩのColorCodeと割り出されたフェムトセル基地局のColorCodeとが一致した場合、Ｓ２０９のＹｅｓとする。付近には存在しないマクロセル基地局やフェムトセル基地局から取得されたＵＡＴＩである場合（Ｓ２０９でＮｏの場合）、ＵＡＴＩ取得通知（遠方）を送信する。フェムトセル基地局は、ＵＡＴＩ取得通知（近隣）を受信した場合は、後述の監視フェーズへ移行する（Ｓ２１０）。   The management server 40 determines the femtocell base station 10a registered with the wireless communication terminal 30 based on the identification information (ESN) of the wireless communication terminal 30 (S207). When the femtocell base station 10a is determined (Yes in S208), a macrocell base station in the vicinity of the determined femtocell base station based on ColorCode (radio area information) that can identify the communication area If it is found that the UATI is acquired from a neighboring femtocell base station (Yes in S209), a UATI acquisition notification (neighboring) is sent to the determined femtocell base station. For example, the management server 40 has the ColorCode of each femtocell base station in advance (for example, obtained from the above-described broadcast information), and the UATI ColorCode matches the determined ColorCode of the femtocell base station , S209 Yes. When the UATI is acquired from a macro cell base station or a femtocell base station that does not exist in the vicinity (No in S209), a UATI acquisition notification (distant) is transmitted. When the femtocell base station receives the UATI acquisition notification (neighboring), the femtocell base station proceeds to a monitoring phase described later (S210).

図９は、ＵＡＴＩ取得通知（近隣）の情報を示しており、図１０は、ＵＡＴＩ取得通知（遠方）の情報を示している。ＵＡＴＩ取得通知には、マクロセル基地局のColorCode、無線通信端末３０の識別情報（ＥＳＮ等）、ＵＡＴＩが含まれる。   FIG. 9 shows UATI acquisition notification (neighborhood) information, and FIG. 10 shows UATI acquisition notification (far) information. The UATI acquisition notification includes the color code of the macro cell base station, the identification information (such as ESN) of the wireless communication terminal 30, and the UATI.

＜監視フェーズ＞
図１１は、フェムトセル基地局が監視フェーズのときの無線通信システムの動作について説明する図である。監視フェーズの段階では、フェムトセル基地局１０ａは、無線通信送信部１１を停止させ、無線通信受信部１２と有線通信部１４を起動させている。フェムトセル基地局１０ａは、監視フェーズのときは無線通信受信部１２を起動させて無線通信端末３０の監視を開始する。 <Monitoring phase>
FIG. 11 is a diagram for explaining the operation of the wireless communication system when the femtocell base station is in the monitoring phase. In the stage of the monitoring phase, the femtocell base station 10a stops the wireless communication transmitting unit 11 and starts the wireless communication receiving unit 12 and the wired communication unit 14. In the monitoring phase, the femtocell base station 10a activates the wireless communication receiving unit 12 and starts monitoring the wireless communication terminal 30.

図１２は、フェムトセル基地局が監視フェーズのときの動作の詳細を示すシーケンス図である。図１２に示すように、無線通信端末３０とマクロセル基地局２０とが通信しているとき（Ｓ３０１）に、フェムトセル基地局１０ａは、無線通信端末３０からマクロセル基地局２０への送信波を受信する（監視する）（Ｓ３０２）。次に、受信した送信波からＵＡＴＩを抽出し、ＵＡＴＩを基にして復調を実施する（Ｓ３０３）。復調が可能であった場合は、登録された無線通信端末３０からの送信波である。復調が可能であり、ColorCodeが近隣であれば（Ｓ３０４でＹｅｓの場合）、基地局動作フェーズに移行する（Ｓ３０５）。   FIG. 12 is a sequence diagram showing details of the operation when the femtocell base station is in the monitoring phase. As shown in FIG. 12, when the radio communication terminal 30 and the macro cell base station 20 are communicating (S301), the femtocell base station 10a receives a transmission wave from the radio communication terminal 30 to the macro cell base station 20. (Monitor) (S302). Next, UATI is extracted from the received transmission wave and demodulated based on UATI (S303). When demodulation is possible, the transmission wave is from the registered wireless communication terminal 30. If demodulation is possible and ColorCode is in the vicinity (Yes in S304), the process proceeds to the base station operation phase (S305).

図１３は、ＵＡＴＩ取得通知（遠方）を受信したときのシーケンス図である。Ｓ４０１〜Ｓ４０３までの動作は、図１２のＳ３０１〜Ｓ３０３までの動作と同様である。図１３に示すように、フェムトセル基地局１０ａは、監視フェーズにてフェムトセルを管理する管理サーバ４０から登録されている無線通信端末全てのＵＡＴＩ取得通知（遠方）を受信し（Ｓ４０４）、近隣に登録されている無線通信端末が存在しないと判定した場合（Ｓ４０５でＹｅｓの場合）、前述の無線通信端末３０の監視を停止し、待受けフェーズへ移行する（Ｓ４０６）。   FIG. 13 is a sequence diagram when a UATI acquisition notification (distant) is received. The operations from S401 to S403 are the same as the operations from S301 to S303 in FIG. As shown in FIG. 13, the femtocell base station 10a receives the UATI acquisition notification (distant) of all the wireless communication terminals registered from the management server 40 that manages the femtocell in the monitoring phase (S404), If it is determined that there is no wireless communication terminal registered in (No in S405), the monitoring of the wireless communication terminal 30 is stopped and the process proceeds to the standby phase (S406).

フェムトセル基地局１０ａは、無線通信端末３０の送信波をＭＩ、ＭＱを基にして復調する。図１４はＭＩの例を示しており、図１５はＭＱの例を示している。図１４、図１５中のＡ０〜Ａ３１は取得しているＵＡＴＩのビットを示す。   The femtocell base station 10a demodulates the transmission wave of the wireless communication terminal 30 based on MI and MQ. FIG. 14 shows an example of MI, and FIG. 15 shows an example of MQ. A0 to A31 in FIGS. 14 and 15 indicate the acquired UATI bits.

＜基地局動作フェーズ＞
基地局動作フェーズの段階では、フェムトセル基地局１０ａは、無線通信送信部１１と無線通信受信部１２と有線通信部１４を起動させている。
フェムトセル基地局１０ａは、基地局動作フェーズのときは無線通信送信部１１を起動させて電波の送信を開始し、基地局としての動作を行う。待ち受けしている無線通信端末３０がいなくなった場合は、前述の監視フェーズへ移行する。 <Base station operation phase>
In the base station operation phase, the femtocell base station 10a activates the wireless communication transmitting unit 11, the wireless communication receiving unit 12, and the wired communication unit 14.
In the base station operation phase, the femtocell base station 10a activates the wireless communication transmission unit 11 to start radio wave transmission, and operates as a base station. When there is no standby wireless communication terminal 30, the process proceeds to the monitoring phase described above.

以上説明したように、本発明の実施の形態に係るフェムトセル基地局は、通信を許可されている無線通信端末がフェムトセルの近隣にいる場合に無線通信端末の送信波の監視を開始するため、無線通信端末がフェムトセルの遠隔地にいるときでも送信波の監視を行っている場合よりも、効率的な電力消費を行うことができる。   As described above, the femtocell base station according to the embodiment of the present invention starts monitoring the transmission wave of the radio communication terminal when the radio communication terminal permitted to communicate is in the vicinity of the femtocell. Even when the wireless communication terminal is in a remote place of the femtocell, it is possible to perform more efficient power consumption than when the transmission wave is monitored.

８ マクロセル
９ａ、９ｂ フェムトセル
１０ａ、１０ｂ フェムトセル基地局
１１ 無線通信送信部
１２ 有線通信受信部
１３ マクロセル監視部
１４、４４ 有線通信部
１５、４５ 記憶部
１６、４６ 制御部
２０ マクロセル基地局
２２、２３ ルータ
２４ ゲートウェイ
２５ フェムトセル利用者契約回線
２６ 無線通信ネットワーク
３０ 無線通信端末
４０ 管理サーバ
４３ ＵＡＴＩ判定部 8 Macrocell 9a, 9b Femtocell 10a, 10b Femtocell base station 11 Wireless communication transmitter 12 Wired communication receiver 13 Macrocell monitoring unit 14, 44 Wired communication unit 15, 45 Storage unit 16, 46 Control unit 20 Macrocell base station 22, 23 router 24 gateway 25 femtocell user contract line 26 wireless communication network 30 wireless communication terminal 40 management server 43 UATI determination unit

Claims (5)

広域基地局と通信可能な広域エリア内にある狭域エリアで通信可能とする狭域基地局を管理する管理サーバにおいて、
無線通信端末と、該無線通信端末を収容する前記狭域基地局との対応関係を管理する制御部と、
前記広域基地局および前記狭域基地局と通信する有線通信部と、
前記広域基地局と通信している前記無線通信端末が、前記狭域基地局と同じ無線エリア情報のエリア内にいるか否かを、前記広域基地局から得た無線エリア情報に基づいて判定する判定部とを備え、
前記判定部が、前記無線通信端末が前記狭域基地局と同じ無線エリア情報のエリア内にいると判定した場合は、前記制御部は、前記狭域基地局が前記無線通信端末からの電波の受信を開始するように、前記狭域基地局に、前記無線通信端末が前記狭域基地局と同じ無線エリア情報のエリア内にいることを通知することを特徴とする管理サーバ。 In a management server that manages a narrow area base station that can communicate in a narrow area within a wide area that can communicate with a wide area base station,
A control unit that manages a correspondence relationship between a wireless communication terminal and the narrow area base station that accommodates the wireless communication terminal;
A wired communication unit communicating with the wide area base station and the narrow area base station;
Determining whether the wireless communication terminal communicating with the wide area base station is in the same area of the wireless area information as the narrow area base station based on the wireless area information obtained from the wide area base station With
When the determination unit determines that the wireless communication terminal is in the same area of the wireless area information as the narrow area base station, the control unit determines that the narrow area base station transmits radio waves from the wireless communication terminal. A management server that notifies the narrow area base station that the wireless communication terminal is in the same area of the wireless area information as the narrow area base station so as to start reception. 前記判定部は、複数の狭域基地局の収容対象となっている無線通信端末を、前記狭域基地局と同じ無線エリア情報のエリア内にいると判定することを特徴とする請求項１に記載の管理サーバ。   The said determination part determines that the radio | wireless communication terminal used as the accommodation object of several narrow area base stations is in the area of the same radio area information as the said narrow area base station, The characterized by the above-mentioned. The management server described. 前記制御部は、前記無線通信端末の位置登録の際に、前記無線エリア情報を、前記広域基地局から、前記有線通信部を介して取得することを特徴とする請求項１または２に記載の管理サーバ。   The said control part acquires the said wireless area information from the said wide area base station via the said wired communication part at the time of the position registration of the said wireless communication terminal, The Claim 1 or 2 characterized by the above-mentioned. Management server. 広域基地局と通信可能な広域エリア内にある狭域エリアで通信可能な狭域基地局を構成する基地局装置において、
収容対象となっている無線通信端末からの電波を受信する無線通信受信部と、
前記無線通信受信部による電波の受信を制御する制御部と、
自基地局を管理する管理サーバと通信する有線通信部とを備え、
前記制御部は、収容対象となっている全ての無線通信端末が位置登録されていない場合、前記無線通信受信部に対し電波の受信を停止させ、前記無線通信端末が自基地局と同じ無線エリア情報のエリア内にいることを前記管理サーバから前記有線通信部介して通知された場合は、前記無線通信受信部に対し前記無線通信端末からの電波の受信を開始させることを特徴とする基地局装置。 In a base station apparatus constituting a narrow area base station capable of communicating in a narrow area within a wide area capable of communicating with a wide area base station,
A wireless communication receiver that receives radio waves from a wireless communication terminal to be accommodated;
A control unit for controlling reception of radio waves by the wireless communication receiving unit;
A wired communication unit that communicates with a management server that manages its own base station;
When all the wireless communication terminals to be accommodated are not registered in location, the control unit causes the wireless communication reception unit to stop receiving radio waves, and the wireless communication terminal is in the same wireless area as its own base station. A base station that, when notified from the management server via the wired communication unit that it is in an information area, causes the wireless communication receiving unit to start receiving radio waves from the wireless communication terminal; apparatus. 前記制御部は、前記無線通信端末が自基地局と同じ無線エリア情報のエリア内にいないことを前記管理サーバから前記有線通信部介して通知された場合は、前記無線通信受信部に対し前記無線通信端末からの電波の受信を停止させることを特徴とする請求項４に記載の基地局装置。   The control unit, when notified from the management server via the wired communication unit that the wireless communication terminal is not in the same area of the wireless area information as the base station, the wireless communication receiving unit The base station apparatus according to claim 4, wherein reception of radio waves from the communication terminal is stopped.
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