JP2000217145A - Radio channel assignment system - Google Patents
Radio channel assignment systemInfo
- Publication number
- JP2000217145A JP2000217145A JP1738199A JP1738199A JP2000217145A JP 2000217145 A JP2000217145 A JP 2000217145A JP 1738199 A JP1738199 A JP 1738199A JP 1738199 A JP1738199 A JP 1738199A JP 2000217145 A JP2000217145 A JP 2000217145A
- Authority
- JP
- Japan
- Prior art keywords
- base station
- station
- channel
- assignment
- master
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Time-Division Multiplex Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明が属する技術の分野】本発明は、無線チャンネル
割り当てシステムに関し、特に、携帯電話等の無線シス
テムを使用して一般加入者（電話機）を収容するワイヤ
レス・ローカル・ループにおけるダイナミック・チャン
ネル配置方式の無線チャンネル割り当てシステムに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio channel assignment system, and more particularly to a dynamic channel allocation system in a wireless local loop for accommodating a general subscriber (telephone) using a radio system such as a cellular phone. Wireless channel assignment system.
【０００２】[0002]
【従来の技術】従来、無線チャネルを最適に配置するこ
とは、有限の周波数資源を有効に活用するために必要不
可欠であり、色々なチャネル配置の方式が研究されてい
る。2. Description of the Related Art Conventionally, optimal allocation of radio channels is indispensable for effectively using limited frequency resources, and various channel allocation methods have been studied.
【０００３】たとえば、通常のチャネル間隔の間に各チ
ャネルの中心周波数を割り当てるインターリーブチャネ
ル配置方式及びスプリットチャネル配置方式がある。こ
の方式はスペクトルが重なっているために、隣接チャネ
ルは同一セル内では使用できない欠点があり、隣接セル
の使用に制限しても干渉条件から制約を受け、周波数利
用効率の抜本的な改善には至っていない。For example, there are an interleaved channel allocation method and a split channel allocation method in which a center frequency of each channel is allocated during a normal channel interval. This method has the drawback that adjacent channels cannot be used in the same cell due to overlapping spectrum, and even if the use of adjacent cells is restricted, interference conditions restrict the use of adjacent channels. Not reached.
【０００４】また、チャネルは隣接チャネル程度まで離
せば割り当てが可能となるが、トラフィック分布が一様
でない場合にはチャネル使用効率が極端に低下する欠点
がある。Channels can be allocated if they are separated from each other by about the adjacent channel. However, when traffic distribution is not uniform, there is a drawback that channel use efficiency is extremely reduced.
【０００５】以上の欠点を解決するために一つのセルと
一定の距離内にある干渉セルで使用していないチャネル
を選択するダイナミックチャネル配置方式が提案されて
いる。In order to solve the above-mentioned drawbacks, there has been proposed a dynamic channel allocation method for selecting a channel not used by an interfering cell within a certain distance from one cell.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上述したダイ
ナミックチャネル配置方式では、トラフィックの増減に
合わせて多数の基地局にまたがる情報を集中局で高速に
処理する必要がある。However, in the above-described dynamic channel allocation method, it is necessary to process information over a large number of base stations at a high speed in a centralized station in accordance with increase or decrease in traffic.
【０００７】また、各基地局毎にチャネル使用に関する
優先度を持たせて各チャネルの干渉レベルの大小によっ
て変化させる分散型のダイナミックチャネル配置方式も
考えられるが、個々の基地局で計測する干渉レベルと他
の基地局との干渉具合の関係が明確にならず、時間的な
トラフィックの変動に適合できない。[0007] A distributed dynamic channel allocation method in which each base station has a priority regarding channel use and changes according to the level of interference of each channel can be considered, but the interference level measured by each base station is considered. The relationship between the traffic and other base stations is not clear, and cannot adapt to temporal traffic fluctuations.
【０００８】そこで、本発明は、集中型のダイナミック
・チャネル配置方式で課題とされているチャネル割り当
ての即時性と情報量の軽減、分散型のダイナミック・チ
ャネル配置方式で課題とされているトラフィックの変動
の適合性や他の基地局制御との連係等の問題点を解決す
る無線チャンネル割り当てシステムを提供することを課
題としている。Accordingly, the present invention provides a method for reducing the amount of information and the immediacy of channel allocation, which is a problem in a centralized dynamic channel allocation method, and a method for reducing traffic, which is a problem in a distributed dynamic channel allocation method. It is an object of the present invention to provide a wireless channel assignment system that solves problems such as adaptability of fluctuations and coordination with other base station controls.
【０００９】[0009]
【課題を解決するための手段】上記の課題を解決するた
めの本発明は、加入者端末と、前記加入者端末と無線通
信を行う基地局と、前記基地局を制御する基地局制御局
とを含み、前記基地局と前記加入者端末との間の無線チ
ャンネルの割り当てを決定する無線チャンネル割り当て
システムであって、前記基地局制御局は、前記基地局を
主局と従局に分類し、前記主局は、前記従局にチャンネ
ル情報を要求する信号を送信し、前記従局はチャンネル
情報を前記主局に送信し、前記主局は、前記チャンネル
情報に基づいて前記チャンネルの割り当てを決定する。According to the present invention, there is provided a subscriber terminal, a base station for performing wireless communication with the subscriber terminal, and a base station control station for controlling the base station. A radio channel assignment system that determines assignment of a radio channel between the base station and the subscriber terminal, wherein the base station control station classifies the base station into a master station and a slave station, The master station transmits a signal requesting channel information to the slave station, the slave station transmits channel information to the master station, and the master station determines the channel assignment based on the channel information.
【００１０】[0010]
【発明の実施の形態】以下、図面を参照して、本発明の
実施の形態について説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図１は、本発明の無線チャンネル割り当て
システムのブロック図である。図１に示すように、本発
明システムは、携帯電話の様な加入者端末と基地局が無
線で接続されるシステム（ワイヤレス・ローカル・ルー
プ）において、通常の交換機１と無線アクセスシステム
を交換する基地局制御局２で構成され、加入者の近くの
基地局３には無線２０１および３０１で接続される場合
と光ファイバーを含むケーブル２０２で接続される場合
がある。FIG. 1 is a block diagram of a wireless channel assignment system according to the present invention. As shown in FIG. 1, the system of the present invention exchanges a wireless access system with a normal exchange 1 in a system (wireless local loop) in which a subscriber terminal such as a mobile phone and a base station are wirelessly connected. The base station 3 is configured by the base station control station 2 and is connected to the base station 3 near the subscriber by radios 201 and 301 or by a cable 202 including an optical fiber.
【００１２】基地局３は無線で送受信されるアンテナ３
０１と基地局制御局２からの無線を送受信する回路３１
０、加入者端末４に接続するために無線に変換する回路
３１３とアンテナ３０２、両方の無線をコンバートする
回路３１１を具備している。The base station 3 is an antenna 3 for wirelessly transmitting and receiving.
01 and a circuit 31 for transmitting and receiving radio signals from the base station control station 2
0, a circuit 313 for converting to radio for connection to the subscriber terminal 4 and an antenna 302, and a circuit 311 for converting both radios.
【００１３】また、ケーブル２０２で接続された基地局
３はコンバートする回路３１１と同程度の回路を具備し
た回路３１２を具備して有線から無線にコンバートする
機能を持っている。The base station 3 connected by the cable 202 includes a circuit 312 having a circuit equivalent to the circuit 311 for conversion, and has a function of converting from wired to wireless.
【００１４】基地局３と加入者端末４は、基地局からの
無線の送受を司るアンテナ４０１と無線に変換する回路
４１０、無線から電話機インターフェースに変換する回
路４１１を具備している。この電話機インターフェース
変換する回路４１１は電話機５と接続する機能を持って
いる。また、この電話機インターフェース変換回路４１
１と類似の変換回路４１２は複数の電話機５を収容でき
る。The base station 3 and the subscriber terminal 4 are provided with an antenna 401 for controlling transmission and reception of radio waves from the base station, a circuit 410 for converting to radio, and a circuit 411 for converting from radio to a telephone interface. The telephone interface conversion circuit 411 has a function of connecting to the telephone 5. Also, this telephone interface conversion circuit 41
A conversion circuit 412 similar to one can accommodate a plurality of telephones 5.
【００１５】図２は、二つの基地局による無線チャンネ
ルの割り当てを説明するためのシーケンス図である。FIG. 2 is a sequence diagram for explaining the assignment of a radio channel by two base stations.
【００１６】先ず、基地局制御局２は各基地局に対して
基準となる主局かそれ以外の従局かのアナウンスを行
う。その後に各基地局３はそれぞれ主局（基地局Ａ）は
従局（基地局Ｂ）に対して「ＣＨ情報要求」を送信す
る。これは従局で保持しているチャネルの干渉具合や希
望するチャネル番号等の情報を主局に送信する様に求め
る信号である。First, the base station control station 2 announces to each base station whether it is a master station serving as a reference or a slave station other than the master station. Thereafter, each base station 3 transmits a "CH information request" from the master station (base station A) to the slave station (base station B). This is a signal requesting that information such as the degree of interference of the channel held by the slave station and the desired channel number be transmitted to the master station.
【００１７】従局は自局で保持しているそれらの情報を
主局に「ＣＨ情報」として送り、主局ではこれらの情報
を元にして回りの基地局に影響を及ぼさない無線のチャ
ネル配置を決定し、「ＣＨ割り当て情報」として従局に
送信する。The slave station sends the information held by itself to the master station as "CH information", and the master station uses the information to determine a wireless channel arrangement that does not affect surrounding base stations. It is determined and transmitted to the slave station as “CH allocation information”.
【００１８】以上の動作が終了した後、加入者電話機５
への着信については、交換機１より着信信号が基地局制
御局２に到達し、加入者の最寄りの基地局Ｂ３に着信さ
せる。この時に、基地局Ｂは上記のシーケンスによって
得られた「ＣＨ割り当て情報」により使用する無線周波
数を加入者端末４にアサインして加入者電話５に着信さ
せる。After the above operation is completed, the subscriber telephone 5
The incoming signal from the exchange 1 reaches the base station control station 2 and is sent to the base station B3 closest to the subscriber. At this time, the base station B assigns the radio frequency to be used to the subscriber terminal 4 based on the “CH allocation information” obtained by the above sequence and causes the subscriber telephone 5 to receive the radio frequency.
【００１９】加入者電話からの発信についても上記のシ
ーケンスと同様に、加入者電話機５からの発信に対して
基地局Ｂ３は無線チャネルの割り当てを上記「ＣＨ割り
当て情報」より得られた無線チャネルを両者間でアサイ
ンし、基地局Ｂ３および基地局制御局２、交換機１と通
って呼を接続する。Similarly to the above-mentioned sequence, the base station B3 transmits a call from the subscriber's telephone to the call from the subscriber's telephone 5, and assigns a radio channel to the radio channel obtained from the "CH allocation information". Assignment is made between the two, and a call is connected through the base station B3, the base station control station 2, and the exchange 1.
【００２０】図３は、３つの局による割り当てのシーケ
ンス図である。図３に示すように、主局基地局Ａが従局
Ｂ、Ｃに通信できる場合、基地局Ａは基地局Ｂと基地局
Ｃにそれぞれ交信をし、それぞれの干渉具合と希望する
チャネル番号を収集して各基地局が影響のない無線チャ
ネルを選択して基地局Ｂと基地局Ｃに「ＣＨ割り当て」
を行う。FIG. 3 is a sequence diagram of assignment by three stations. As shown in FIG. 3, when the master station base station A can communicate with the slave stations B and C, the base station A communicates with the base stations B and C, respectively, and collects the degree of interference and the desired channel number. Then, each base station selects a wireless channel that has no influence and assigns “CH allocation” to base stations B and C.
I do.
【００２１】図４は、３つの局による割り当てのシーケ
ンス図であり、基地局Ａから片方の何れかの基地局と交
信ができない場合において、任意の従局（基地局Ｂ）か
ら基地局Ｃの情報を中継させる。FIG. 4 is a sequence diagram of allocation by three stations. When base station A cannot communicate with any one of the base stations, information from any slave station (base station B) to base station C can be obtained. Relay.
【００２２】基地局Ｂと基地局Ａの間で、通信可能な局
情報を交換し、従局（基地局Ｂ）は主局（基地局Ａ）が
知り得ない基地局が存在することを主局に通知すると共
に、自動的に基地局Ｃと基地局Ａの中継局の役割を果た
す。The base station B and base station A exchange communicable station information, and the slave station (base station B) determines that there is a base station unknown to the master station (base station A). And automatically acts as a relay station between the base station C and the base station A.
【００２３】又、基地局Ａに基地局制御局から基地局Ｂ
を経由して基地局Ｃと交信することと、基地局Ｂに基地
局Ｃの情報を基地局Ａに中継することを指示する。Also, the base station A sends a signal from the base station control station to the base station B.
, And instruct the base station B to relay the information of the base station C to the base station A.
【００２４】図５は４つの局による割り当てのシーケン
ス図である。従局は複数の局を自動で中継することがで
きる。又、複数の局に対して基地局制御局から中継の指
示をすることができる。FIG. 5 is a sequence diagram of assignment by four stations. A slave station can automatically relay a plurality of stations. Also, a relay instruction can be issued from the base station control station to a plurality of stations.
【００２５】上記の全ての動作は開始時、運用時に係わ
らずいつでも実施できる。All of the above operations can be performed at any time, regardless of the start or operation.
【００２６】以上本発明の実施の形態について説明した
が、本発明はこれに限らず、交換機１と基地局制御局２
の接続は無線でも有線でも構わない。Although the embodiment of the present invention has been described above, the present invention is not limited to this, and the exchange 1 and the base station control station 2
Connection may be wireless or wired.
【００２７】又、交換機１との地上網との接続において
通常の電話機５に直接接続される場合と、交換機１と同
程度の交換機と接続される場合、構内用ＰＢＸ交換機等
にも接続してもよい。Further, in the connection between the exchange 1 and the ground network, when the telephone 1 is directly connected to the ordinary telephone 5 or when the same exchange as the exchange 1 is connected, it is also connected to the private PBX exchange or the like. Is also good.
【００２８】又、基地局制御局２と基地局３との接続は
無線、光ファイバー、メタル線等通信伝送ができる媒体
であればいずれも使用できる。The connection between the base station control station 2 and the base station 3 can be any wireless, optical fiber, metal wire or any other medium capable of communication transmission.
【００２９】又、基地局制御局２と基地局３とのアクセ
ス方式はポイント−ポイントでもポイント−マルチポイ
ントいずれであってもよい。The access system between the base station control station 2 and the base station 3 may be either point-to-point or point-to-multipoint.
【００３０】又、基地局３と加入者端末４は無線で接続
され、多重方式はポイント−マルチポイントを基本とし
するが、ポイント−ポイントでも可能であり、ＴＤＭＡ
方式、ＦＤＭＡ方式、ＣＤＭＡ方式等が好適に使用でき
る。Further, the base station 3 and the subscriber terminal 4 are connected by radio, and the multiplexing method is based on point-multipoint.
System, FDMA system, CDMA system, and the like can be suitably used.
【００３１】又、基地局３と加入者端末４の無線アクセ
ス方式はＧＳＭ（global system for mobile communica
tion：欧州のディジタル自動車・携帯電話方式）やＡＭ
ＰＳ（advanced mobile phone service：米国のアナロ
グ携帯電話方式）、ＰＤＣ（personal digital cellula
r：日本のディジタル携帯電話の標準方式）、ＰＣＳ（p
ersonal communication system：米国のパーソナル移動
通信システム）、ＤＥＣＴ（digital european cordles
s telephone：欧州のディジタルコードレス電話方
式）、ＰＨＳ（personal handy phone system：日本の
簡易型携帯電話）等が使用できる。The radio access system between the base station 3 and the subscriber terminal 4 is GSM (global system for mobile communication).
tion: European digital car / mobile phone system) and AM
PS (advanced mobile phone service: American analog mobile phone system), PDC (personal digital cellula)
r: Japanese digital mobile phone standard system), PCS (p
personal communication system: US personal mobile communication system), DECT (digital european cordles)
s telephone: a digital cordless telephone system in Europe), PHS (personal handy phone system: a simplified mobile phone in Japan) and the like can be used.
【００３２】又、加入者端末４と電話機５は単体でも複
数でも接続できる。The subscriber terminal 4 and the telephone 5 can be connected individually or in plurals.
【００３３】[0033]
【発明の効果】以上説明した本発明によれば、従来の集
中型のダイナミック・チャネル配置方式で課題とされて
いるチャネル割り当ての即時性と情報量の軽減が可能と
なる。According to the present invention described above, it is possible to reduce the amount of information and the immediacy of channel assignment, which are issues in the conventional centralized dynamic channel allocation method.
【００３４】又、本発明によれば、従来の分散型のダイ
ナミック・チャネル配置方式で課題とされているトラフ
ィックの変動の適合性や他の基地局制御との連係等を保
つことができる。Further, according to the present invention, it is possible to maintain the adaptability of traffic fluctuation and the coordination with other base station controls, which are issues in the conventional distributed dynamic channel allocation method.
【図１】本発明の無線チャンネル割り当てシステムのブ
ロック図FIG. 1 is a block diagram of a wireless channel assignment system according to the present invention.
【図２】２つの基地局による無線チャンネル割り当ての
シーケンス図FIG. 2 is a sequence diagram of wireless channel assignment by two base stations.
【図３】３つの基地局による無線チャンネル割り当ての
シーケンス図FIG. 3 is a sequence diagram of wireless channel assignment by three base stations.
【図４】３つの基地局による無線チャンネル割り当ての
シーケンス図（続き）FIG. 4 is a sequence diagram of wireless channel assignment by three base stations (continued)
【図５】４つの基地局による無線チャンネル割り当ての
シーケンス図FIG. 5 is a sequence diagram of wireless channel assignment by four base stations.
１ 交換機 ２ 基地局制御局 ３ 基地局 ４ 加入者端末 ５ 電話機 ２０１、３０１、３０２、４０１ アンテナ ２０２ 光ファイバーを含むケーブル ３１０、４１０ 送受信回路 ３１１、４１１ コンバート回路 REFERENCE SIGNS LIST 1 switch 2 base station controller 3 base station 4 subscriber terminal 5 telephone 201, 301, 302, 401 antenna 202 cable including optical fiber 310, 410 transmission / reception circuit 311, 411 conversion circuit
Claims (3)
信を行う基地局と、前記基地局を制御する基地局制御局
とを含み、前記基地局と前記加入者端末との間の無線チ
ャンネルの割り当てを決定する無線チャンネル割り当て
システムであって、 前記基地局制御局は、前記基地局を主局と従局に分類
し、 前記主局は、前記従局にチャンネル情報を要求する信号
を送信し、前記従局はチャンネル情報を前記主局に送信
し、 前記主局は、前記チャンネル情報に基づいて前記チャン
ネルの割り当てを決定することを特徴とする無線チャン
ネル割り当てシステム。1. A wireless communication system between a base station and a subscriber terminal, comprising: a subscriber terminal; a base station for performing wireless communication with the subscriber terminal; and a base station control station for controlling the base station. A radio channel assignment system for deciding channel assignment, wherein the base station control station classifies the base station into a master station and a slave station, and the master station transmits a signal requesting channel information to the slave station. The slave station transmits channel information to the master station, and the master station determines the channel assignment based on the channel information.
局を前記主局に通知し、 前記主局は、前記基地局制御局を介して、前記主局が交
信できない基地局に無線チャンネルを割り当てることを
特徴とする請求項１記載の無線チャンネル割り当てシス
テム。2. The slave station notifies the master station of a base station with which the master station cannot communicate, and the master station transmits a radio channel to the base station with which the master station cannot communicate via the base station control station. The wireless channel assignment system according to claim 1, wherein the assignment is performed.
当てを望む無線チャンネル番号及びチャンネル間干渉を
含むことを特徴とする請求項１記載の無線チャンネル割
り当てシステム。3. The wireless channel allocation system according to claim 1, wherein the channel information includes a wireless channel number and an inter-channel interference desired by the slave station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| JP1738199A JP3267944B2 (en) | 1999-01-26 | 1999-01-26 | Wireless channel assignment system |
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| Application Number | Priority Date | Filing Date | Title |
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| JP1738199A JP3267944B2 (en) | 1999-01-26 | 1999-01-26 | Wireless channel assignment system |
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| JP2000217145A true JP2000217145A (en) | 2000-08-04 |
| JP3267944B2 JP3267944B2 (en) | 2002-03-25 |
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| JP1738199A Expired - Fee Related JP3267944B2 (en) | 1999-01-26 | 1999-01-26 | Wireless channel assignment system |
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| JP2005539424A (en) * | 2002-09-13 | 2005-12-22 | テレフォンアクチーボラゲット エル エム エリクソン（パブル） | Optimization mechanism for frequency reuse |
| JP2008258859A (en) * | 2007-04-04 | 2008-10-23 | Nakayo Telecommun Inc | Radio telephone system with channel automatic setting function |
| US8738020B2 (en) | 2000-12-15 | 2014-05-27 | Adaptix, Inc. | Multi-carrier communications with adaptive cluster configuration and switching |
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| JP2014171259A (en) * | 2014-05-30 | 2014-09-18 | Nec Corp | Inter-cell interference suppression method, radio base station, mobile communication system, and user terminal |
-
1999
- 1999-01-26 JP JP1738199A patent/JP3267944B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JP3267944B2 (en) | 2002-03-25 |
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