JP2008109423A - Radio base station device and its power saving control method - Google Patents

Radio base station device and its power saving control method Download PDF

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JP2008109423A
JP2008109423A JP2006290683A JP2006290683A JP2008109423A JP 2008109423 A JP2008109423 A JP 2008109423A JP 2006290683 A JP2006290683 A JP 2006290683A JP 2006290683 A JP2006290683 A JP 2006290683A JP 2008109423 A JP2008109423 A JP 2008109423A
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base station
radio base
carrier
mobile
station apparatus
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Mitsuhiro Tani
光弘 谷
Hironori Kawamura
浩紀 川村
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Fujitsu Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0203Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing 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 suppress wasteful transmission of radio waves and reduce power consumption by controlling transmission power of the carrier that is transmitted from a base station, relating to a radio base station device and its power-saving control method. <P>SOLUTION: The number of accepted mobile units which have accepted incoming/outgoing calls at a radio base station device 1-2, the number of accepted mobile units that have accepted incoming/outgoing calls at a radio network control device 1-3, or the number of registered mobile units that have been registered for position at a mobile multimedia exchange 1-4 is compared, for magnitude, with the threshold value preset in the radio base station device 1-2. If it is detected that the number of accepted mobile units or the number of registered mobile units is lower than the threshold value, outputting of a part of a plurality of carriers transmitted from the radio base station 1-2 is stopped stepwise. If it is detected that the number of accepted mobile units or the number of registered mobile units exceeds the threshold value, transmitting of the carrier whose outputting is being stopped is resumed stepwise. Further, when outputting of a part of the carriers is stopped, the rotational speed of a cooling fan in the radio base station device 1-2 is decreased stepwise. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、無線基地局装置及びその省電力制御方法に関し、特に、CDMA(Code Division Multiple Access)方式による移動通信システムの無線基地局装置及びその省電力制御方法に関する。   The present invention relates to a radio base station apparatus and a power saving control method thereof, and more particularly, to a radio base station apparatus of a mobile communication system using a CDMA (Code Division Multiple Access) method and a power saving control method thereof.

移動通信事業者は、より多くのユーザーが通信サービスを受けることができるよう、無線通信サービスエリアにおける無線基地局、セクタ数、キャリア(搬送波)数等を設計し、無線通信サービスエリアの運用を開始する。移動無線通信サービスを受けるユーザー数は、時間及び場所によって流動的に変動するため、移動通信事業者は、変動するユーザー数の最大数をサポートするように、無線通信サービスエリアにおける移動機収容数を設計する。   Mobile communication carriers design wireless base stations, number of sectors, number of carriers (carriers), etc. in the wireless communication service area and start operation of the wireless communication service area so that more users can receive communication services To do. Since the number of users who receive mobile radio communication services fluctuates dynamically depending on the time and place, mobile operators need to set the mobile station capacity in the radio communication service area to support the maximum number of users that fluctuate. design.

一般に、都市部等では昼間は人口が集中してユーザーが増大するが、夜間は人口が分散しユーザーが減少する。移動通信事業者は、なるべく多くのユーザーの通信をサポートするために、昼間の人口分布に合わせて、1つの基地局がカバーする区域(セル)のセクタやキャリアを設計し、各ユーザーの移動機が初期セルサーチにおいてチャネル捕捉に使用する止まり木チャネルの設定を行い、無線基地局装置から電波の送信を行う。   Generally, in urban areas and the like, the population is concentrated during the daytime and the number of users increases, but at night, the population is dispersed and the number of users decreases. In order to support the communication of as many users as possible, the mobile communication carrier designs the sector (carrier) of the area (cell) covered by one base station according to the daytime population distribution, and the mobile device of each user. Sets the perch channel used for channel acquisition in the initial cell search, and transmits radio waves from the radio base station apparatus.

昼間は多くのユーザーが移動無線通信を行うため、無線基地局装置から送信する電波は効率よく利用されるが、人口が少なくなり利用頻度が減少する夜間などは、通信に使用されない無駄な電波を送信し、無線基地局装置は無駄な電力を消費していることになる。   Since many users perform mobile wireless communication during the day, the radio waves transmitted from the radio base station equipment are used efficiently, but at night when the population decreases and the frequency of use decreases, unnecessary radio waves that are not used for communication are transmitted. The wireless base station device is transmitting wasteful power.

無線基地局装置における送信電力制御に関する先行技術文献として、下記の特許文献1には、単一搬送波周波数或いは複数の搬送波周波数を用いた拡散通信システムにおいて、加入者を効率的に各基地局に収容するために、少なくとも1つの周波数の搬送波に載せた特定のチャネルの拡散信号の送信電力を可変制御することにより、該搬送波に収容される移動機の収容数を制御する手段を備え、より多くの移動機を収容している搬送波の減衰量を多くし、収容移動機数のより少ない搬送波がより大きな強度で送信されるようにすることにより、基地局エリアに新規に入ってきた移動機が、収容数の少ない搬送波により多く収容されるようにした拡散通信システムが記載されている。
特開2000−201101号公報
As a prior art document relating to transmission power control in a radio base station apparatus, the following Patent Document 1 discloses that a subscriber is efficiently accommodated in each base station in a spread communication system using a single carrier frequency or a plurality of carrier frequencies. To control the number of mobile terminals accommodated in the carrier by variably controlling the transmission power of the spread signal of a specific channel carried on the carrier of at least one frequency, By increasing the amount of attenuation of the carrier that accommodates the mobile device and transmitting the carrier with a smaller number of accommodated mobile devices with greater strength, the mobile device newly entering the base station area A spread communication system is described in which a large number of carriers are accommodated by a small number of carriers.
JP 2000-201101 A

上記特許文献1の拡散通信システムは、無線基地局装置の処理負荷分散化のために、移動機の収容数が多くなると、無線基地局装置から送信するキャリアの送信電力を小さくすることにより、移動機が他のエリアの無線基地局装置からのキャリアへ乗り移り、移動元の無線基地局装置の処理負荷を軽減することを特徴としている。つまり、移動機収容数とキャリア送信電力は反比例の関係である。   The spread communication system disclosed in Patent Literature 1 reduces the transmission power of the carrier transmitted from the radio base station apparatus when the number of mobile stations accommodated increases in order to distribute the processing load of the radio base station apparatus. The machine is transferred to a carrier from a radio base station apparatus in another area, and the processing load of the radio base station apparatus of the movement source is reduced. That is, the number of mobile units accommodated and the carrier transmission power are in an inversely proportional relationship.

上記拡散通信システムでは、隣接する2つの基地局が共に輻輳し、移動機収容数が或る閾値を超えて増加した場合、該2つの基地局は共にキャリアの送信電力を小さくするため、該2つの基地局の中間に位置する移動機の通信品質が悪くなる、或いは通信することができなくなるという問題点を生じる。   In the spread communication system, when two adjacent base stations are congested together and the mobile station capacity increases beyond a certain threshold, both the two base stations reduce the carrier transmission power. There arises a problem that the communication quality of a mobile device located in the middle of two base stations is deteriorated or communication becomes impossible.

また、前述したように、移動通信事業者は、利用者数が最も増える昼間の人口分布に合わせて一律に電波の送信を行うが、それによって、利用頻度が減少する夜間などでは、無駄な電波を送信し、その分、基地局では無駄な電力を消費していることになる。本発明は上記の問題を解決し、基地局から送信するキャリアの送信電力を制御し、無線通信サービスエリア内に所在する移動機の通信品質を劣化させることなく、無駄な電波の送信抑止及び無線基地局装置の消費電力の減少化を図ることを目的とする。   In addition, as described above, mobile communication carriers transmit radio waves uniformly according to the daytime population distribution in which the number of users is the largest. However, unnecessary radio waves are used at night when the usage frequency decreases. Therefore, the base station consumes wasted power accordingly. The present invention solves the above problem, controls transmission power of a carrier transmitted from a base station, suppresses useless radio wave transmission and wireless communication without degrading communication quality of a mobile device located in a wireless communication service area. The object is to reduce the power consumption of the base station apparatus.

本発明の無線基地局装置の省電力制御は、無線基地局装置で発着信の受付を行った受付移動機数、当該無線基地局装置が接続された無線ネットワーク制御装置で発着信の受付を行った受付移動機数、又は当該無線基地局装置を管轄する移動マルチメディア交換機に位置登録された登録移動機数を、予め設定した閾値と大小比較し、前記受付移動機数又は登録移動機数が前記閾値を下回ったことを検出したとき、当該無線基地局装置から送信する複数のキャリアのうちの一部のキャリアの出力を停止し、また、前記受付移動機数又は登録移動機数が前記閾値を上回ったことを検出したとき、出力停止中のキャリアの送信を再開することを特徴とする。   The power saving control of the radio base station apparatus according to the present invention includes the number of mobile stations that have accepted incoming / outgoing calls at the radio base station apparatus and the incoming / outgoing calls at the radio network control apparatus to which the radio base station apparatus is connected The number of accepted mobile devices or the number of registered mobile devices registered in the mobile multimedia exchange that has jurisdiction over the radio base station apparatus is compared with a preset threshold value, and the number of accepted mobile devices or the number of registered mobile devices is When it is detected that the value is below the threshold, the output of some of the plurality of carriers transmitted from the radio base station apparatus is stopped, and the number of accepted mobile devices or the number of registered mobile devices is the threshold value. When it is detected that the output exceeds the threshold, transmission of the carrier whose output is stopped is resumed.

また、前記無線基地局装置の基地局エリアに隣接する基地局エリアの輻輳状況を、前記無線ネットワーク制御装置を介して該無線基地局装置へ通知し、前記隣接する基地局エリアが輻輳状態にある旨の通知を受けたとき、前記キャリア出力停止の実行を中止させることを特徴とする。   Also, the congestion status of the base station area adjacent to the base station area of the radio base station apparatus is notified to the radio base station apparatus via the radio network control apparatus, and the adjacent base station area is in a congestion state When receiving the notification to the effect, the execution of the carrier output stop is stopped.

また、前記キャリア出力停止の実行において、一部のキャリアの出力の停止と共に、前記無線基地局装置内の空冷用ファンの回転数を低下させ、前記キャリア出力再開の実行において、一部のキャリアの送信の再開と共に、前記無線基地局装置内の空冷用ファンの回転数を増大させることを特徴とする。   Further, in the execution of the carrier output stop, together with the stop of the output of some carriers, the rotational speed of the air cooling fan in the radio base station apparatus is decreased, and in the execution of the restart of the carrier output, Along with the resumption of transmission, the number of rotations of the air cooling fan in the radio base station apparatus is increased.

また、一部のキャリアの出力を停止する際に、運用中のキャリアの中から移動機受付数の最も少ないキャリアを選択して、該キャリアの出力の停止を行うこととし、それにより、キャリア出力停止に伴うハンドオーバーの処理負担を軽減することができる。また、キャリアの出力を再開する際のキャリア選択において、隣接無線基地局の輻輳しているキャリアと同じ周波数のキャリアを選択することとし、これにより、隣接基地局とのスムーズなハンドオーバーを実現することができる。   In addition, when stopping the output of some carriers, the carrier with the smallest number of mobile units accepted is selected from the carriers in operation, and the carrier output is stopped. It is possible to reduce the processing load of handover due to the stop. In carrier selection when resuming carrier output, a carrier having the same frequency as the congested carrier of the adjacent radio base station is selected, thereby realizing a smooth handover with the adjacent base station. be able to.

本発明によれば、無線基地局装置は、発着信の受付が行われた受付移動機数又は自装置の位置登録エリアに登録されている登録移動機数等の移動機収容数を基に、キャリア送信出力の停止・開始制御を行い、該移動機収容数が減少したとき、一部のキャリアの送信出力を停止することにより、無駄な電波の送信を抑止すると共に、無線基地局装置の電力消費量を削減することが可能となる。   According to the present invention, the radio base station device is based on the number of mobile devices accommodated such as the number of accepted mobile devices that have been accepted for incoming / outgoing calls or the number of registered mobile devices registered in the location registration area of the own device, When the carrier transmission output stop / start control is performed and the mobile station capacity decreases, the transmission output of some carriers is stopped, thereby suppressing unnecessary radio wave transmission and the power of the radio base station apparatus. It is possible to reduce consumption.

また、移動機収容数に見合った数のキャリアを送信し、更に、隣接する基地局エリアが輻輳状態にあるときは、キャリア出力停止の実行を中止することにより、輻輳している隣接基地局エリアから多くの移動機が一度に移動してきても、それらの移動機の通信を中断又は切断させることなく、ハンドオーバーによる通信の継続が可能となり、サービスエリア内に所在する移動機の通信品質を劣化させない。   In addition, when the number of carriers corresponding to the number of mobile units accommodated is transmitted, and when the adjacent base station area is in a congested state, the execution of the carrier output stop is stopped, thereby congesting the adjacent base station area. Even if a large number of mobile devices move at a time, it is possible to continue communication by handover without interrupting or disconnecting the communication of those mobile devices, which degrades the communication quality of mobile devices located in the service area I won't let you.

また、移動機収容数に応じて効率的に電波を出力するため電力消費量が減少し、廃熱量を少なくすることができ、その分、冷却用ファンの回転数を低下させることにより、騒音の低減とともに、更に電力消費量の低減が可能となる。   In addition, since radio waves are efficiently output according to the number of mobile units accommodated, power consumption is reduced, and the amount of waste heat can be reduced. Along with the reduction, the power consumption can be further reduced.

図1は本発明が適用される移動通信ネットワークの構成例を示す。同図に示すネットワークにおいて、無線基地局装置1−2は、各ユーザーが所持する移動機1−1と無線送受信を行い、無線ネットワーク制御装置1−3は、無線基地局装置1−2の制御を行い、例えばハンドオーバー等の制御を行う。   FIG. 1 shows a configuration example of a mobile communication network to which the present invention is applied. In the network shown in the figure, the radio base station apparatus 1-2 performs radio transmission / reception with the mobile device 1-1 possessed by each user, and the radio network control apparatus 1-3 controls the radio base station apparatus 1-2. For example, control such as handover is performed.

移動マルチメディア交換機1−4は、マルチメディア信号処理とともにコアネットワークとして交換階梯の処理機能を有する。ホームロケーションレジスタ1−5は、ユーザーと移動機に関するデータを管理するためのデータベースで、移動マルチメディア交換機1−4の配下に位置登録されている移動機1−1の登録数のデータを収集する。   The mobile multimedia exchange 1-4 has a processing function of an exchange hierarchy as a core network together with multimedia signal processing. The home location register 1-5 is a database for managing data related to users and mobile devices, and collects data on the number of registered mobile devices 1-1 whose locations are registered under the mobile multimedia exchange 1-4. .

また、無線ネットワーク制御装置1−3は、その配下で発着信の受付を行った移動機1−1の受付数のデータを収集し、無線基地局装置1−2は、その配下で発着信の受付を行った移動機1−1の受付数のデータを収集する。ホームロケーションレジスタ1−5は、収集した上記登録数のデータを、定期的に移動マルチメディア交換機1−4及び無線ネットワーク制御装置1−3を経由して、その配下のそれぞれの無線基地局装置1−2へ通知する。また、無線ネットワーク制御装置1−3は、収集した移動機1−1の受付数のデータを、定期的に配下のそれぞれの無線基地局装置1−2へ通知する。   Further, the radio network controller 1-3 collects data on the number of receptions of the mobile device 1-1 that has accepted incoming / outgoing calls under its control. Collect the data of the number of reception of the mobile device 1-1 that has received the reception. The home location register 1-5 periodically collects the collected number of registered data via the mobile multimedia exchange 1-4 and the radio network control device 1-3, and each of the radio base station devices 1 thereunder. -2. In addition, the radio network control device 1-3 periodically notifies the collected data on the number of received mobile devices 1-1 to each subordinate radio base station device 1-2.

ホームロケーションレジスタ1−5の位置登録移動機数、無線ネットワーク制御装置1−3の受付移動機数、及び無線基地局装置1−2の受付移動機数の通知を受けた無線基地局装置1−2は、それらの位置登録移動機数及び受付移動機数に応じて、キャリア(搬送波)の出力電力及び送信停止又は再開を制御する。   The radio base station apparatus 1- 1 that has received notification of the number of mobile stations registered in the home location register 1-5, the number of mobile stations accepted by the radio network controller 1-3, and the number of mobile stations accepted by the radio base station apparatus 1-2. 2 controls the output power of the carrier (carrier wave) and the transmission stop or restart according to the number of location registration mobile devices and the number of accepted mobile devices.

無線基地局装置1−2では、複数段階の閾値を設定しておき、ホームロケーションレジスタ1−5、無線ネットワーク制御装置1−3から受信した移動機数のデータ、及び自装置で収集した自装置における受付移動機数のデータを基に、自装置で送信するキャリアの省電力レベルを決定する。   In the radio base station apparatus 1-2, thresholds in a plurality of stages are set, and the home location register 1-5, the data of the number of mobile devices received from the radio network control apparatus 1-3, and the own apparatus collected by the own apparatus The power saving level of the carrier transmitted by the own apparatus is determined based on the data on the number of accepted mobile devices.

省電力レベルは、運用キャリア数及び冷却用のファンの回転数を、段階的に変化させることができるように設定される。最大省電力レベルでは、隣接する基地局エリアから移動機1−1が当該基地局エリアへ移動してきても、正常に通信をすることができるように、少なくとも1つのキャリアを運用状態に保持する。   The power saving level is set so that the number of operating carriers and the number of rotations of the cooling fan can be changed in stages. At the maximum power saving level, at least one carrier is maintained in an operating state so that normal communication can be performed even when the mobile device 1-1 moves from the adjacent base station area to the base station area.

無線基地局装置1−2の出力電力制御の動作としては、複数のキャリアのうちの一部のキャリアの送信出力を停止するものとし、その場合、無線基地局装置1−2における移動機収容数のデータ収集をキャリア毎に分けて行い、移動機収容数に応じて順位を付け、移動機収容数が最も少ないキャリアから順に送信出力の停止を行う。また、送信出力の停止を解除し、送信を再開する場合は、例えば周波数の低いキャリアから再開を行う。   As an operation of output power control of the radio base station apparatus 1-2, the transmission output of some of the plurality of carriers is stopped. In that case, the number of mobile units accommodated in the radio base station apparatus 1-2 The data collection is performed for each carrier, ranking is made according to the number of mobile units accommodated, and transmission output is stopped in order from the carrier with the smallest number of mobile units accommodated. Further, when canceling the stop of the transmission output and restarting the transmission, for example, the restart is performed from a carrier having a low frequency.

図2に本発明における省電力レベルの設定例を示す。同図は、無線基地局装置が送信信号のキャリアとして4つのキャリアを有する場合の例を表にして示している。表の左端から省電力レベル、ホームロケーションレジスタ(H)位置登録移動機数、無線ネットワーク制御装置(R)受付移動機数、無線基地局装置(B)受付移動機数、無線基地局装置(B)の省電力動作(レベル0→3)、無線基地局装置(B)の省電力解除動作(レベル3→0)を、省電力レベル対応に示している。なお、ホームロケーションレジスタ(H)位置登録移動機数は、移動マルチメディア交換機に位置登録された登録移動機数と同義である。   FIG. 2 shows an example of setting the power saving level in the present invention. This figure shows an example in which the radio base station apparatus has four carriers as carriers of transmission signals in a table form. From the left end of the table, the power saving level, the number of home location register (H) location registration mobile devices, the number of wireless network control device (R) reception mobile devices, the number of wireless base station devices (B) reception mobile devices, the radio base station devices (B The power saving operation (level 0 → 3) and the power saving cancellation operation (level 3 → 0) of the radio base station apparatus (B) are shown corresponding to the power saving level. The number of home location register (H) location registered mobile devices is synonymous with the number of registered mobile devices registered in the mobile multimedia exchange.

ここで省電力レベル0は、ホームロケーションレジスタ(H)位置登録移動機数が閾値[a]以上の場合のレベルで、この場合、無線基地局装置(B)は省電力動作としては何もせず、無線基地局装置として従来どおり動作し、4つのキャリア全てを送信する。また、省電力解除動作としては、送信停止中のキャリアの中で例えば1番目に周波数が低いキャリアの出力停止を解除し、結果的に4つキャリア全てを送信する。   Here, the power saving level 0 is a level when the home location register (H) location registration mobile number is equal to or greater than the threshold value [a]. In this case, the radio base station apparatus (B) does not perform any power saving operation. As a wireless base station device, it operates as before and transmits all four carriers. As the power saving cancel operation, the output stop of the carrier having the lowest frequency among the carriers whose transmission is stopped is canceled, and as a result, all four carriers are transmitted.

省電力レベル1は、ホームロケーションレジスタ(H)位置登録移動機数が閾値[a]未満で、無線ネットワーク制御装置(R)受付移動機数が閾値[b]以上の場合のレベルで、この場合、無線基地局装置(B)は省電力動作としては、送信キャリアの中で受付移動機数が1番目に少ないキャリアの出力を停止し、3つのキャリアを送信し、装置内冷却用ファンの回転数を20%低下させた状態にする。また、省電力解除動作としては、停止中のキャリアの中で例えば1番目に周波数が低いキャリアの出力停止を解除し、結果的に3つのキャリアを送信する状態にする。   The power saving level 1 is a level when the number of mobile stations registered in the home location register (H) is less than the threshold value [a] and the number of mobile stations accepting the radio network controller (R) is equal to or greater than the threshold value [b]. As a power saving operation, the radio base station apparatus (B) stops the output of the carrier having the smallest number of accepted mobile stations among the transmission carriers, transmits three carriers, and rotates the cooling fan in the apparatus. The number is reduced by 20%. Further, as the power saving cancellation operation, for example, the output stop of the carrier having the lowest frequency among the stopped carriers is canceled, and as a result, three carriers are transmitted.

省電力レベル2は、ホームロケーションレジスタ(H)位置登録移動機数が閾値[a]未満で、無線ネットワーク制御装置(R)受付移動機数が閾値[b]未満で、無線基地局装置(B)受付移動機数が閾値[c]以上の場合のレベルで、この場合、無線基地局装置(B)は省電力動作としては、送信キャリアの中で受付移動機数が1番目に少ないキャリアの出力を停止し、2つのキャリアを送信し、装置内冷却用ファンの回転数を40%低下させた状態とする。また、省電力解除動作としては、停止中のキャリアの中で例えば1番目に周波数が低いキャリアの出力停止を解除し、結果的に2つのキャリアを送信する状態にする。   In the power saving level 2, the number of home location register (H) location registration mobile devices is less than the threshold value [a], the number of mobile network control device (R) reception mobile devices is less than the threshold value [b], ) This is the level when the number of accepted mobile units is equal to or greater than the threshold [c]. In this case, the radio base station apparatus (B) is the power saving operation of the carrier with the smallest number of accepted mobile units among the transmission carriers. The output is stopped, two carriers are transmitted, and the number of rotations of the cooling fan in the apparatus is reduced by 40%. As the power saving cancellation operation, for example, the output stop of the carrier having the lowest frequency among the stopped carriers is canceled, and as a result, two carriers are transmitted.

省電力レベル3は、ホームロケーションレジスタ(H)位置登録移動機数が閾値[a]未満で、無線ネットワーク制御装置(R)受付移動機数が閾値[b]未満で、無線基地局装置(B)受付移動機数が閾値[c]未満の場合のレベルで、この場合、無線基地局装置(B)は省電力動作としては、送信キャリアの中で受付移動機数が1番目に少ないキャリアの出力を停止し、1つのキャリアを送信し、装置内冷却用ファンの回転数を60%低下させた状態とする。また、省電力解除動作としては、1つのキャリア送信をする状態にする。   In the power saving level 3, the number of mobile devices registered in the home location register (H) is less than the threshold value [a], the number of mobile network accepting mobile devices (R) is less than the threshold value [b], and the wireless base station device (B ) This is the level when the number of accepted mobile devices is less than the threshold value [c]. In this case, the radio base station apparatus (B) is the power saving operation of the carrier with the smallest number of accepted mobile devices among the transmission carriers. The output is stopped, one carrier is transmitted, and the number of rotations of the cooling fan in the apparatus is reduced by 60%. Moreover, as a power saving cancellation | release operation | movement, it will be in the state which carries out one carrier transmission.

なお、上記の閾値[a],[b],[c]の値は、[a]>[b]>[c]である。また、移動マルチメディア交換機及び無線ネットワーク制御装置から無線基地局装置への位置登録移動機数(在圏移動機数)及び発着信受付移動機数(以下、これらを総称して移動機収容数という)の通知、並びに無線基地局装置における送信キャリア出力電力制御のシーケンスを図3に示す。   Note that the values of the threshold values [a], [b], and [c] are [a]> [b]> [c]. In addition, the number of registered mobile stations from the mobile multimedia exchange and the radio network controller to the radio base station apparatus (the number of mobile stations in the area) and the number of mobile stations that accept and receive calls (hereinafter collectively referred to as the mobile station capacity) 3) and a transmission carrier output power control sequence in the radio base station apparatus are shown in FIG.

同図に示すように、移動マルチメディア交換機MMS(ホームロケーションレジスタHLR)は、在圏移動機数を無線ネットワーク制御装置RNCに通知し、無線ネットワーク制御装置RNCは、無線基地局装置BTSに、移動マルチメディア交換機MMSにおける在圏移動機数及び無線ネットワーク制御装置RNCの発着信受付移動機数を通知する。   As shown in the figure, the mobile multimedia exchange MMS (home location register HLR) notifies the radio network controller RNC of the number of mobile stations in the area, and the radio network controller RNC moves to the radio base station apparatus BTS. It notifies the number of mobile stations in the multimedia exchange MMS and the number of mobile stations that accept and receive calls from the radio network controller RNC.

無線基地局装置BTSは、無線ネットワーク制御装置RNCから通知された移動機収容数が各閾値[a],[b],[c]以上であるか以下であるかを判定し、該判定の結果を基に省電力レベルを決定し、該省電力レベルに応じた送信キャリア出力電力制御を行う。   The radio base station apparatus BTS determines whether the mobile station accommodation number notified from the radio network controller RNC is greater than or less than each threshold value [a], [b], [c], and the result of the determination The power saving level is determined based on the transmission carrier output power control according to the power saving level.

図4は移動機収容数の時間経過による変化と、移動機収容数が閾値[a],[b],[c]を越えて変動したときの送信キャリアの停止/再開の制御動作の流れを示す。夜間などのように移動機収容数が減少する方向にある場合、移動機収容数から省電力レベルを決定して、移動機収容数に対応した省電力レベルまで送信キャリア出力数及び装置内冷却用ファンの回転数を下げていく。   FIG. 4 shows the flow of the control operation for stopping / resuming the transmission carrier when the mobile station capacity changes over time and the mobile station capacity fluctuates beyond the threshold values [a], [b], [c]. Show. When the number of mobile units accommodated is decreasing, such as at night, the power saving level is determined from the number of mobile units accommodated, and the number of transmission carrier outputs and the equipment cooling are reduced to the power saving level corresponding to the number of mobile units Reduce the fan speed.

なお、送信キャリアの出力を停止させる際には、該キャリアで通信している移動機の通信が切断されないようにするため、隣接する他の基地局からのキャリアに該移動機が乗り換えて継続して通信を行うことができるよう、送信キャリアの出力電力を段階的(例えば、1[dB]/ステップ)に低減していく。   When stopping the output of the transmission carrier, in order to prevent the communication of the mobile station communicating with the carrier from being disconnected, the mobile station continues to switch to a carrier from another adjacent base station. The output power of the transmission carrier is gradually reduced (for example, 1 [dB] / step) so that communication can be performed.

一方、朝や昼間などのように移動機収容数が増加する方向にある場合、無線基地局装置は移動機収容数を認識し、該移動機収容数に応じた省電力レベルを判定し、該省電力レベルに基づいた送信キャリアを出力し、かつ冷却用ファンの回転数を上げる。このように送信キャリアの出力制御を行うことにより、無線基地局装置は無駄な電波を出力することなく、収容移動機数に応じた効率的な電波の出力を行うことができ、無線基地局装置自体の電力消費量を低減することができる。   On the other hand, when the mobile station capacity is increasing, such as in the morning or during the daytime, the radio base station apparatus recognizes the mobile station capacity, determines the power saving level according to the mobile station capacity, and A transmission carrier based on the power saving level is output, and the number of rotations of the cooling fan is increased. By performing transmission carrier output control in this way, the radio base station apparatus can perform efficient radio wave output according to the number of mobile stations accommodated without outputting useless radio waves. The power consumption of itself can be reduced.

但し、上述の制御動作では、隣接している他の基地局配下のキャリアに多くの移動機が収容されている状態で、自局配下の送信キャリアを多数停止している場合、他の基地局配下の移動機が自局配下のエリアに移動してくると、運用キャリアが少ないためにそれらの移動機を収容しきれなくなり、該移動機は通信をすることができなくなってしまう可能性がある。   However, in the control operation described above, when many mobile stations are accommodated in adjacent carriers under other base stations and many transmission carriers under its own station are stopped, other base stations When a mobile device under its control moves to an area under its own station, it may not be able to accommodate those mobile devices due to a small number of operational carriers, and the mobile device may not be able to communicate. .

このようなことが起こらないようにするため、各無線基地局装置は、自局配下の収容移動機数が予め設定した閾値より増加したとき、無線ネットワーク制御装置RNCにその旨を通知する。無線ネットワーク制御装置RNCは、配下の基地局エリアがそれぞれどの基地局エリアと隣接しているか、即ち基地局エリア相互の隣接関係を把握しているため、或る基地局が多くの移動機を収容し輻輳状態にある場合、その基地局の輻輳状態を、隣接関係にある他の基地局に通知する。   In order to prevent this from happening, each radio base station apparatus notifies the radio network control apparatus RNC to that effect when the number of mobile stations accommodated by itself increases from a preset threshold value. Since the radio network controller RNC knows which base station area each subordinate base station area is adjacent to, ie, the adjacent relationship between the base station areas, a certain base station accommodates many mobile stations. If the base station is in a congested state, the base station is notified of the congested state of the base station.

多数の移動機を収容している隣接基地局が存在することの通知を受けた無線基地局装置は、キャリアの出力停止中であれば、キャリア出力停止を解除し、また、キャリア出力中であれば、省電力レベルに応じた省電力動作モードによるキャリア出力停止制御動作を中止する。これにより、隣接基地局が輻輳状態にあるときは、キャリア送信を停止することなく、輻輳している隣接基地局エリアから多くの移動機が一度に移動してきても、それらの移動機の通信を中断又は切断させることなく、ハンドオーバーによる通信の継続が可能となる。   A radio base station apparatus that has received a notification that there is an adjacent base station that accommodates a large number of mobile stations cancels the carrier output stop if the carrier output is stopped, For example, the carrier output stop control operation in the power saving operation mode corresponding to the power saving level is stopped. As a result, when adjacent base stations are in a congested state, even if many mobile devices move from the congested adjacent base station area without stopping carrier transmission, communication of those mobile devices can be performed. Communication by handover can be continued without interruption or disconnection.

この隣接基地局の移動機収容数によるキャリア出力停止制御動作の中止は、隣接基地局から移動機収容数が閾値より減少した旨の通知を、無線ネットワーク制御装置RNC経由で受けたときに解除する。つまり、隣接基地局の輻輳状態が解けたとき、省電力動作モードに戻る。   The cancellation of the carrier output stop control operation based on the number of mobile stations accommodated by the adjacent base station is canceled when a notification from the adjacent base station that the mobile station capacity has decreased below the threshold is received via the radio network controller RNC. . That is, when the congestion state of the adjacent base station is solved, the operation returns to the power saving operation mode.

図5に隣接基地局の輻輳状態を通知するシーケンスを示す。ここで第1の基地局BTS1と第2の基地局BTS2とが互いに隣接し、第2の基地局BTS2が省電力制御を実施しようとしている基地局で、第1の基地局BTS1が輻輳している基地局であるとする。第1の基地局BTS1では移動機(ユーザ端末)の収容数を監視し(5−1)、該移動機(ユーザ端末)の収容数が閾値以上になったことを検出すると(5−2)、無線ネットワーク制御装置RNCに輻輳セルが存在する旨を通知する(5−3)。   FIG. 5 shows a sequence for notifying the congestion state of the adjacent base station. Here, the first base station BTS1 and the second base station BTS2 are adjacent to each other, and the second base station BTS2 is trying to perform power saving control, and the first base station BTS1 is congested. Suppose that it is a base station. The first base station BTS1 monitors the number of mobile units (user terminals) accommodated (5-1), and detects that the number of mobile units (user terminals) is greater than or equal to the threshold (5-2). Then, the radio network controller RNC is notified that there is a congestion cell (5-3).

無線ネットワーク制御装置RNCは、第1の基地局BTS1から上記輻輳状態にある旨の通知を受けると、隣接する第2の基地局BTS2に、第1の基地局BTS1が輻輳している旨を通知する(5−4)。第2の基地局BTS2は上記通知を受けると、隣接基地局輻輳フラグをオン状態にセットし(5−5)、省電力のためのキャリア停止制御動作を中止する(5−6)。   When the radio network controller RNC receives a notification from the first base station BTS1 that it is in the congestion state, it notifies the adjacent second base station BTS2 that the first base station BTS1 is congested. (5-4). Upon receiving the above notification, the second base station BTS2 sets the adjacent base station congestion flag to the on state (5-5) and stops the carrier stop control operation for power saving (5-6).

やがて、第1の基地局BTS1で移動機(ユーザ端末)の収容数が閾値以下になったことを検出すると(5−7)、無線ネットワーク制御装置RNCに輻輳が解除された旨を通知する(5−8)。無線ネットワーク制御装置RNCは、第1の基地局BTS1から輻輳状態解除の旨の通知を受けると、隣接する第2の基地局BTS2に、第1の基地局BTS1が輻輳解除した旨を通知する(5−9)。第2の基地局BTS2は上記通知を受けると、隣接基地局輻輳フラグをオフ状態にセットし(5−10)、省電力のためのキャリア停止制御動作を再開する(5−11)。   Eventually, when the first base station BTS1 detects that the number of mobile terminals (user terminals) is below the threshold (5-7), it notifies the radio network controller RNC that the congestion has been released ( 5-8). When the radio network controller RNC receives a notification that the congestion state is released from the first base station BTS1, the radio network controller RNC notifies the adjacent second base station BTS2 that the congestion of the first base station BTS1 has been released ( 5-9). Upon receiving the above notification, the second base station BTS2 sets the adjacent base station congestion flag to the off state (5-10), and resumes the carrier stop control operation for power saving (5-11).

図6は無線基地局装置における送信キャリア出力停止制御の機能ブロック構成を示す。同図に示すように、無線基地局装置は、移動機から無線信号を受信器6−1で受信し、該受信信号を基に移動機収容数監視部6−2で移動機収容数を監視し、該移動機収容数と閾値との大小比較を比較部6−3で行う。   FIG. 6 shows a functional block configuration of transmission carrier output stop control in the radio base station apparatus. As shown in the figure, the radio base station apparatus receives a radio signal from the mobile device by the receiver 6-1 and monitors the mobile device accommodation number by the mobile device accommodation number monitoring unit 6-2 based on the received signal. Then, the comparison unit 6-3 performs a size comparison between the number of mobile units accommodated and a threshold value.

上記閾値は移動機収容数閾値レジスタ6−4で保持される。比較部6−3の比較結果を基に基地局輻輳フラグ設定部6−5により輻輳フラグを設定し、無線ネットワーク制御装置RNCを経由して隣接基地局へ輻輳状態を通知する。また、無線ネットワーク制御装置RNCを経由して隣接基地局から輻輳状態の通知を隣接基地局輻輳フラグ設定部6−6で受けて隣接基地局輻輳フラグを設定する。   The threshold value is held in the mobile device accommodation number threshold register 6-4. Based on the comparison result of the comparison unit 6-3, a congestion flag is set by the base station congestion flag setting unit 6-5, and the congestion state is notified to the adjacent base station via the radio network controller RNC. Also, the adjacent base station congestion flag setting unit 6-6 receives a congestion state notification from the adjacent base station via the radio network controller RNC and sets the adjacent base station congestion flag.

比較部6−3における比較結果、及び隣接基地局輻輳フラグ設定部6−6からの隣接基地局輻輳フラグに基づいて、送信制御部6−7により送信キャリアの出力停止制御を行い、送信制御部6−7で決定された送信キャリアを送信器6−8から移動機へ向けて送信する。また、送信制御部6−7は、省電力モード設定レジスタ6−10の設定内容に従って、省電力のためのキャリア停止制御動作を実行又は中止する。   Based on the comparison result in the comparison unit 6-3 and the adjacent base station congestion flag from the adjacent base station congestion flag setting unit 6-6, the transmission control unit 6-7 performs output stop control of the transmission carrier, and the transmission control unit The transmission carrier determined in 6-7 is transmitted from the transmitter 6-8 to the mobile device. Further, the transmission control unit 6-7 executes or stops the carrier stop control operation for power saving according to the setting contents of the power saving mode setting register 6-10.

図7に無線基地局装置における送信キャリア出力停止制御の動作フローを示す。同図に示すように、まず、省電力モード設定レジスタ6−10の設定がオン状態かオフ状態かを判定し(7−1)、オフ状態であれば、キャリア停止制御動作を実行せず、オン状態となるのを待機する。省電力モード設定レジスタ6−10は、例えばイベントの開催時や不測の事故や災害の発生時等のように、通常とは異なるトラフィックの発生が予想される場合などにはオフ状態にし、キャリア停止制御を実行しないようにする。   FIG. 7 shows an operation flow of transmission carrier output stop control in the radio base station apparatus. As shown in the figure, first, it is determined whether the setting of the power saving mode setting register 6-10 is on or off (7-1). If it is off, the carrier stop control operation is not executed. Wait for it to turn on. The power saving mode setting register 6-10 is turned off to stop the carrier when an unusual traffic is expected, such as when an event is held or when an unexpected accident or disaster occurs. Do not execute control.

省電力モード設定レジスタ6−10の設定がオン状態のとき、隣接基地局輻輳フラグ6−6の設定がオン状態かオフ状態かを判定し(7−2)、オフ状態であれば、移動機収容数監視部6−2により移動機収容数を監視し(7−3)、比較部6−3により移動機収容数が閾値以下であるか否かを判定する(7−4)。   When the setting of the power saving mode setting register 6-10 is on, it is determined whether the setting of the adjacent base station congestion flag 6-6 is on or off (7-2). The accommodation number monitoring unit 6-2 monitors the number of accommodated mobile devices (7-3), and the comparison unit 6-3 determines whether the number of accommodated mobile devices is equal to or less than a threshold value (7-4).

移動機収容数が閾値以下であると判定されたとき、閾値との比較結果に応じた省電力レベルを決定し(7−5)、該省電力レベルに応じたキャリア出力停止を実行し(7−6)、キャリア停止フラグ設定部6−9により停止したキャリアのキャリア停止フラグをオン状態に設定し(7−7)、上述のステップ7−2に戻り、同様の処理を繰り返す。なお、キャリア停止フラグは、各キャリア対応に設定する。   When it is determined that the number of mobile units accommodated is equal to or less than the threshold, a power saving level is determined according to the comparison result with the threshold (7-5), and carrier output stop according to the power saving level is executed (7). −6) The carrier stop flag of the carrier stopped by the carrier stop flag setting unit 6-9 is set to the on state (7-7), the process returns to the above step 7-2, and the same processing is repeated. The carrier stop flag is set for each carrier.

また、移動機収容数が閾値以上である場合、閾値との比較結果に応じた省電力レベルを決定し(7−8)、該省電力レベルに応じたキャリア出力再開を実行し(7−9)、キャリア停止フラグ設定部6−9により再開したキャリアのキャリア停止フラグをオフ状態に設定し(7−12)、上述のステップ7−2に戻り、同様の処理を繰り返す。   If the number of mobile units accommodated is equal to or greater than the threshold, a power saving level is determined according to the comparison result with the threshold (7-8), and carrier output restart is performed according to the power saving level (7-9). ), The carrier stop flag of the carrier resumed by the carrier stop flag setting unit 6-9 is set to the off state (7-12), and the process returns to the above step 7-2 to repeat the same processing.

また、隣接基地局輻輳フラグの判定(7−2)により、隣接基地局輻輳フラグがオン状態に設定されていると判定されたとき、キャリア停止フラグ設定部6−9により設定された停止中のキャリアがある場合(7−10)、停止中のキャリアの出力を再開し(7−11)、キャリア停止フラグ設定部6−9により、再開したキャリアのキャリア停止フラグをオフ状態に設定し(7−12)、上述のステップ7−2に戻り、同様の処理を繰り返す。   Further, when it is determined by the adjacent base station congestion flag determination (7-2) that the adjacent base station congestion flag is set to the on state, the stopped state set by the carrier stop flag setting unit 6-9 is set. When there is a carrier (7-10), the output of the stopped carrier is restarted (7-11), and the carrier stop flag setting unit 6-9 sets the carrier stop flag of the resumed carrier to an off state (7). -12) Returning to step 7-2 described above, the same processing is repeated.

なお、キャリア出力の停止又は再開を決定するための移動機収容数の閾値を、無線基地局装置を監視・遠隔制御することができる装置から設定可能にし、移動通信事業者により該移動機収容数の閾値を適宜設定することができる構成とすることができる。また、キャリア出力の停止制御の実行を、無線基地局装置を監視・遠隔制御することができる装置から、移動通信事業者により指示することができる構成とすることにより、予めイベント等で輻輳が予測される場合は、キャリア出力の停止制御を中止させ、通信に必要なリソース(キャリア)を確保することができる。   The threshold for the number of mobile devices accommodated for determining whether to stop or restart the carrier output can be set from a device that can monitor and remotely control the radio base station device, and the number of mobile devices accommodated by the mobile communication carrier The threshold can be set as appropriate. In addition, congestion can be predicted in advance by an event or the like by adopting a configuration in which a mobile communication carrier can instruct execution of carrier output stop control from a device that can monitor and remotely control a radio base station device. In such a case, it is possible to stop the carrier output stop control and secure resources (carriers) necessary for communication.

また、一部のキャリア出力停止の際に、運用中のキャリアの中から移動機受付数の最も少ないキャリアを選択して、該キャリアの出力の停止を行う構成とすることにより、キャリア出力停止に伴うハンドオーバーの処理負担を軽減することができる。また、キャリア出力再開の際のキャリア選択において、隣接無線基地局の輻輳しているキャリアと同じ周波数のキャリアを選択する構成とし、これにより、隣接基地局とのスムーズなハンドオーバーを実現することができる。   In addition, when the carrier output is stopped, the carrier output is stopped by selecting the carrier with the smallest number of mobile units accepted from the operating carriers and stopping the output of the carrier. The associated processing burden of handover can be reduced. In addition, in carrier selection when resuming carrier output, a carrier having the same frequency as that of a congested carrier of an adjacent radio base station is selected, thereby realizing a smooth handover with an adjacent base station. it can.

(付記1) 移動通信システムの無線基地局装置の省電力制御方法において、無線基地局装置で発着信の受付を行った受付移動機数、当該無線基地局装置が接続された無線ネットワーク制御装置で発着信の受付を行った受付移動機数、又は当該無線基地局装置を管轄する移動マルチメディア交換機に位置登録された登録移動機数を、予め設定した閾値と大小比較する移動機収容数監視ステップと、前記受付移動機数又は登録移動機数が前記閾値を下回ったことを検出したとき、当該無線基地局装置から送信する複数のキャリアのうちの一部のキャリアの出力を停止するキャリア出力停止ステップと、前記受付移動機数又は登録移動機数が前記閾値を上回ったことを検出したとき、前記キャリア出力停止ステップにより出力停止したキャリアの送信を再開するキャリア出力再開ステップと、を含むことを特徴とする無線基地局装置の省電力制御方法。
(付記2) 前記無線基地局装置の基地局エリアに隣接する基地局エリアの輻輳状況を、前記無線ネットワーク制御装置を介して該無線基地局装置へ通知する隣接基地局輻輳状況通知ステップと、前記隣接する基地局エリアが輻輳状態にある旨の通知を受けたとき、前記キャリア出力停止ステップの実行を中止させる省電力制御中止ステップと、を含むことを特徴とする付記1に記載の無線基地局装置の省電力制御方法。
(付記3) 前記キャリア出力停止ステップにおいて、一部のキャリアの出力の停止と共に、前記無線基地局装置内の空冷用ファンの回転数を低下させ、前記キャリア出力再開ステップにおいて、一部のキャリアの送信の再開と共に、前記無線基地局装置内の空冷用ファンの回転数を増大させることを特徴とする付記1に記載の無線基地局装置の省電力制御方法。
(付記4) 移動通信システムの無線基地局装置において、自装置で発着信の受付を行った受付移動機数、当該無線基地局装置が接続された無線ネットワーク制御装置から通知される該無線ネットワーク制御装置で発着信の受付を行った受付移動機数、又は当該無線基地局装置を管轄する移動マルチメディア交換機から通知される該移動マルチメディア交換機に位置登録された登録移動機数を、予め設定した閾値と大小比較する移動機収容数監視手段と、前記受付移動機数又は登録移動機数が前記閾値を下回ったことを検出したとき、自装置から送信する複数のキャリアのうちの一部のキャリアの出力を停止するキャリア出力停止制御手段と、前記受付移動機数又は登録移動機数が前記閾値を上回ったことを検出したとき、前記キャリア出力停止制御手段により出力停止したキャリアの送信を再開するキャリア出力再開制御手段と、を備えたことを特徴とする無線基地局装置。
(付記5) 当該無線基地局装置の基地局エリアに隣接する基地局エリアの輻輳状況の通知を、前記無線ネットワーク制御装置を介して受信する隣接基地局輻輳状況受信手段と、前記隣接基地局輻輳状況受信手段により、隣接する基地局エリアが輻輳状態にある旨の通知を受けたとき、前記キャリア出力停止制御手段によるキャリア出力停止の実行を中止させる省電力制御動作中止手段と、を備えたことを特徴とする付記4に記載の無線基地局装置。
(付記6) 前記キャリア出力停止制御手段は、一部のキャリアの出力停止時に、自装置内の空冷用ファンの回転数を低下させる手段を備え、前記キャリア出力再開制御手段は、一部のキャリアの送信の再開時に、自装置内の空冷用ファンの回転数を増大させる手段を備えたことを特徴とする付記4に記載の無線基地局装置。
(付記7) 前記キャリア出力停止ステップでは、出力を停止するキャリアの選択においてし、キャリア毎に移動機受付数を算出し、移動機受付数が少ないキャリアから順次選択することを特徴とする付記1に記載の無線基地局装置の省電力制御方法。
(付記8) 前記キャリア出力再開ステップでは、出力を再開するキャリアの選択において、隣接無線基地局の輻輳しているキャリアと同じ周波数のキャリアを選択することを特徴とする付記1に記載の無線基地局装置の省電力制御方法。
(付記9) 前記キャリア出力停止制御手段は、出力を停止するキャリアの選択において、キャリア毎に移動機受付数を算出し、移動機受付数が少ないキャリアから順次選択することを特徴とする付記4に記載の無線基地局装置。
(付記10) 前記キャリア出力再開制御手段は、出力を再開するキャリアの選択において、隣接無線基地局の輻輳しているキャリアと同じ周波数のキャリアを選択することを特徴とする付記5に記載の無線基地局装置。
(Additional remark 1) In the power-saving control method of the radio base station apparatus of a mobile communication system, the number of the accepting mobile stations that have accepted the incoming / outgoing calls at the radio base station apparatus, A mobile station accommodation number monitoring step of comparing the number of received mobile stations that have received and received calls, or the number of registered mobile stations registered in the mobile multimedia exchange having jurisdiction over the radio base station apparatus, with a preset threshold value And carrier output stop that stops the output of some of the plurality of carriers transmitted from the radio base station apparatus when it is detected that the number of accepted mobile devices or the number of registered mobile devices is below the threshold value. Step, and when it is detected that the number of accepted mobile devices or the number of registered mobile devices exceeds the threshold, the transmission of the carrier whose output is stopped by the carrier output stop step is detected. And a carrier output resuming step for resuming communication. A power saving control method for a radio base station apparatus, comprising:
(Supplementary Note 2) An adjacent base station congestion status notification step of notifying the radio base station device of the congestion status of the base station area adjacent to the base station area of the radio base station device via the radio network control device, The wireless base station according to supplementary note 1, comprising: a power saving control stop step for stopping execution of the carrier output stop step when receiving notification that an adjacent base station area is in a congested state Device power saving control method.
(Supplementary Note 3) In the carrier output stop step, the rotation of some of the carriers is stopped and the number of rotations of the air cooling fan in the radio base station apparatus is reduced. The power saving control method for a radio base station apparatus according to appendix 1, wherein the number of rotations of an air cooling fan in the radio base station apparatus is increased along with resumption of transmission.
(Additional remark 4) In the radio base station apparatus of the mobile communication system, the number of mobile stations that have accepted incoming / outgoing calls at the own apparatus, and the radio network control notified from the radio network control apparatus to which the radio base station apparatus is connected The number of mobile stations that received / received incoming / outgoing calls at the device, or the number of registered mobile devices registered in the mobile multimedia switch notified by the mobile multimedia switch that has jurisdiction over the radio base station device was set in advance. Mobile unit accommodation number monitoring means for comparing the size with a threshold value, and a part of a plurality of carriers transmitted from the own device when detecting that the number of accepted mobile devices or the number of registered mobile devices is below the threshold value Carrier output stop control means for stopping the output of the carrier, and when detecting that the number of accepted mobile devices or the number of registered mobile devices exceeds the threshold, A radio base station apparatus comprising: carrier output restart control means for restarting transmission of a carrier whose output has been stopped by a stop control means.
(Supplementary Note 5) Adjacent base station congestion status receiving means for receiving notification of congestion status of a base station area adjacent to the base station area of the radio base station device via the radio network control device, and the adjacent base station congestion A power saving control operation stopping means for stopping execution of carrier output stop by the carrier output stop control means when receiving a notification that the adjacent base station area is in a congested state by the status receiving means; The radio base station apparatus according to appendix 4, characterized by:
(Supplementary Note 6) The carrier output stop control means includes means for reducing the number of rotations of the air cooling fan in the own apparatus when the output of some carriers is stopped, and the carrier output restart control means includes some carriers. The radio base station apparatus according to appendix 4, further comprising means for increasing the number of rotations of the air cooling fan in the own apparatus when transmission of the radio is resumed.
(Supplementary Note 7) In the carrier output stop step, in selecting a carrier whose output is to be stopped, the number of received mobile devices is calculated for each carrier, and the carriers are selected in order from the smallest number of received mobile devices. A power saving control method for a radio base station device according to claim 1.
(Supplementary note 8) The radio base station according to supplementary note 1, wherein in the carrier output restarting step, a carrier having the same frequency as that of a congested carrier of an adjacent radio base station is selected in selecting a carrier whose output is to be resumed. A power saving control method for a station apparatus.
(Supplementary note 9) The carrier output stop control means calculates the number of mobile units accepted for each carrier in the selection of the carrier whose output is to be stopped, and sequentially selects from the carriers with the small number of mobile unit acceptances. The radio base station apparatus described in 1.
(Supplementary note 10) The radio according to supplementary note 5, wherein the carrier output restart control means selects a carrier having the same frequency as a carrier that is congested in an adjacent radio base station in selecting a carrier whose output is to be resumed. Base station device.

本発明が適用される移動通信ネットワークの構成例を示す図である。It is a figure which shows the structural example of the mobile communication network to which this invention is applied. 本発明における省電力レベルの設定例を示す図である。It is a figure which shows the example of a setting of the power saving level in this invention. 無線基地局装置への移動機収容数の通知及び送信キャリア出力電力制御のシーケンスを示す図である。It is a figure which shows the sequence of the notification of the mobile station accommodation number to a wireless base station apparatus, and transmission carrier output power control. 移動機収容数の時間経過による変化と送信キャリアの停止/再開の制御動作の流れを示す図である。It is a figure which shows the flow of the control operation | movement of the change of the number of mobile station accommodation with time, and the stop / resume of a transmission carrier. 隣接基地局の輻輳状態を通知するシーケンスを示す図である。It is a figure which shows the sequence which notifies the congestion state of an adjacent base station. 無線基地局装置における送信キャリア出力停止制御の機能ブロック構成を示す図である。It is a figure which shows the functional block structure of the transmission carrier output stop control in a wireless base station apparatus. 無線基地局装置における送信キャリア出力停止制御の動作フローを示す図である。It is a figure which shows the operation | movement flow of the transmission carrier output stop control in a wireless base station apparatus.

符号の説明Explanation of symbols

1−1 移動機
1−2 無線基地局装置
1−3 無線ネットワーク制御装置
1−4 移動マルチメディア交換機
1−5 ホームロケーションレジスタ
1-1 Mobile device 1-2 Radio base station device 1-3 Wireless network control device 1-4 Mobile multimedia exchange 1-5 Home location register

Claims (6)

移動通信システムの無線基地局装置の省電力制御方法において、
無線基地局装置で発着信の受付を行った受付移動機数、当該無線基地局装置が接続された無線ネットワーク制御装置で発着信の受付を行った受付移動機数、又は当該無線基地局装置を管轄する移動マルチメディア交換機に位置登録された登録移動機数を、予め設定した閾値と大小比較する移動機収容数監視ステップと、
前記受付移動機数又は登録移動機数が前記閾値を下回ったことを検出したとき、当該無線基地局装置から送信する複数のキャリアのうちの一部のキャリアの出力を停止するキャリア出力停止ステップと、
前記受付移動機数又は登録移動機数が前記閾値を上回ったことを検出したとき、前記キャリア出力停止ステップにより出力停止したキャリアの送信を再開するキャリア出力再開ステップと、
を含むことを特徴とする無線基地局装置の省電力制御方法。
In a power saving control method for a radio base station apparatus of a mobile communication system,
The number of mobile stations that received and received calls at the radio base station apparatus, the number of mobile stations that received and received calls at the radio network controller connected to the radio base station apparatus, or the radio base station apparatus A mobile unit accommodation number monitoring step of comparing the number of registered mobile units registered in the mobile multimedia exchange with jurisdiction with a preset threshold value;
A carrier output stop step for stopping output of some of the plurality of carriers transmitted from the radio base station device when detecting that the number of accepted mobile devices or the number of registered mobile devices is below the threshold; ,
A carrier output restart step for resuming transmission of the carrier whose output has been stopped by the carrier output stop step when it is detected that the number of accepted mobile devices or the number of registered mobile devices exceeds the threshold;
A power saving control method for a radio base station apparatus, comprising:
前記無線基地局装置の基地局エリアに隣接する基地局エリアの輻輳状況を、前記無線ネットワーク制御装置を介して該無線基地局装置へ通知する隣接基地局輻輳状況通知ステップと、
前記隣接する基地局エリアが輻輳状態にある旨の通知を受けたとき、前記キャリア出力停止ステップの実行を中止させる省電力制御中止ステップと、
を含むことを特徴とする請求項1に記載の無線基地局装置の省電力制御方法。
An adjacent base station congestion status notifying step of notifying the radio base station device of the congestion status of the base station area adjacent to the base station area of the radio base station device;
When receiving a notification that the adjacent base station area is in a congested state, a power saving control stop step for stopping execution of the carrier output stop step;
The power saving control method for a radio base station apparatus according to claim 1, comprising:
前記キャリア出力停止ステップにおいて、一部のキャリアの出力の停止と共に、前記無線基地局装置内の空冷用ファンの回転数を低下させ、
前記キャリア出力再開ステップにおいて、一部のキャリアの送信の再開と共に、前記無線基地局装置内の空冷用ファンの回転数を増大させることを特徴とする請求項1に記載の無線基地局装置の省電力制御方法。
In the carrier output stop step, together with the stop of the output of some carriers, the rotational speed of the air cooling fan in the radio base station device is reduced,
2. The radio base station apparatus saving according to claim 1, wherein, in the carrier output restarting step, the number of rotations of an air cooling fan in the radio base station apparatus is increased along with resumption of transmission of some carriers. Power control method.
移動通信システムの無線基地局装置において、
自装置で発着信の受付を行った受付移動機数、当該無線基地局装置が接続された無線ネットワーク制御装置から通知される該無線ネットワーク制御装置で発着信の受付を行った受付移動機数、又は当該無線基地局装置を管轄する移動マルチメディア交換機から通知される該移動マルチメディア交換機に位置登録された登録移動機数を、予め設定した閾値と大小比較する移動機収容数監視手段と、
前記受付移動機数又は登録移動機数が前記閾値を下回ったことを検出したとき、自装置から送信する複数のキャリアのうちの一部のキャリアの出力を停止するキャリア出力停止制御手段と、
前記受付移動機数又は登録移動機数が前記閾値を上回ったことを検出したとき、前記キャリア出力停止制御手段により出力停止したキャリアの送信を再開するキャリア出力再開制御手段と、
を備えたことを特徴とする無線基地局装置。
In a radio base station apparatus of a mobile communication system,
The number of mobile stations that have accepted incoming / outgoing calls at their own device, the number of mobile stations that have received incoming / outgoing calls at the wireless network control device notified from the wireless network control device to which the wireless base station device is connected, Or, the mobile station accommodation number monitoring means for comparing the number of registered mobile stations registered in the mobile multimedia switch notified from the mobile multimedia switch having jurisdiction over the radio base station apparatus with a preset threshold value;
Carrier output stop control means for stopping the output of some of the plurality of carriers transmitted from the own device when detecting that the number of accepted mobile devices or the number of registered mobile devices is below the threshold;
Carrier output restart control means for resuming transmission of the carrier whose output is stopped by the carrier output stop control means when detecting that the number of accepted mobile stations or the number of registered mobile stations exceeds the threshold;
A radio base station apparatus comprising:
当該無線基地局装置の基地局エリアに隣接する基地局エリアの輻輳状況の通知を、前記無線ネットワーク制御装置を介して受信する隣接基地局輻輳状況受信手段と、
前記隣接基地局輻輳状況受信手段により、隣接する基地局エリアが輻輳状態にある旨の通知を受けたとき、前記キャリア出力停止制御手段によるキャリア出力停止の実行を中止させる省電力制御動作中止手段と、
を備えたことを特徴とする請求項4に記載の無線基地局装置。
Neighboring base station congestion status receiving means for receiving notification of congestion status of a base station area adjacent to the base station area of the radio base station device via the radio network control device;
A power saving control operation stopping means for stopping execution of carrier output stop by the carrier output stop control means when receiving a notification that the adjacent base station area is in a congested state by the adjacent base station congestion status receiving means; ,
The radio base station apparatus according to claim 4, further comprising:
前記キャリア出力停止制御手段は、一部のキャリアの出力停止時に、自装置内の空冷用ファンの回転数を低下させる手段を備え、
前記キャリア出力再開制御手段は、一部のキャリアの送信の再開時に、自装置内の空冷用ファンの回転数を増大させる手段を備えたことを特徴とする請求項4に記載の無線基地局装置。
The carrier output stop control means includes means for reducing the rotational speed of the air cooling fan in the apparatus when the output of some carriers is stopped,
The radio base station apparatus according to claim 4, wherein the carrier output restart control means includes means for increasing the number of rotations of an air cooling fan in the own apparatus when transmission of some carriers is resumed. .
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