JPH08214362A - Channel reassignment method and base station equipment for mobile communication - Google Patents
Channel reassignment method and base station equipment for mobile communicationInfo
- Publication number
- JPH08214362A JPH08214362A JP7015160A JP1516095A JPH08214362A JP H08214362 A JPH08214362 A JP H08214362A JP 7015160 A JP7015160 A JP 7015160A JP 1516095 A JP1516095 A JP 1516095A JP H08214362 A JPH08214362 A JP H08214362A
- Authority
- JP
- Japan
- Prior art keywords
- channel
- base station
- communication channel
- reallocation
- request signal
- Prior art date
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- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000010295 mobile communication Methods 0.000 title claims description 15
- 238000004891 communication Methods 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 230000001413 cellular effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000008707 rearrangement Effects 0.000 description 6
- 238000007476 Maximum Likelihood Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000005562 fading Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、移動通信において周
波数を有効に利用するためのチャネル再割り当て方法及
びそれに用いられる基地局装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a channel reallocation method for effectively using frequencies in mobile communication and a base station apparatus used for the method.
【０００２】[0002]
【従来の技術】移動通信においては、限られた周波数資
源を有効に利用するために様々な技術が開発されてき
た。最も効果的な方法としてセルラ方式があげられる。
この方式では、同一周波数を離れた場所で再利用してい
る。この再利用の度合いは変調信号の耐干渉性に依存し
ており、繰り返し数Ｎで表されている。図３Ａに３ゾー
ン（セル）繰り返し（Ｎ＝３）の様子を示している。こ
のとき、そのシステムのサービス領域を小さな領域に分
割した各ゾーン（セル）には、そのシステムに割り当て
られた周波数帯域を分割したチャネル群ｆ1 ，ｆ2 …ｆ
N が繰り返し割り当てられている。この図３Ａでは隣接
ゾーン（セル）同士は互いに干渉ゾーン（セル）とし
て、同一チャネルは割り当てない。このような方法は、
固定チャネル配置（ＦＣＡ）といわれている。2. Description of the Related Art In mobile communication, various techniques have been developed in order to effectively use limited frequency resources. The most effective method is the cellular system.
In this method, the same frequency is reused at distant places. The degree of this reuse depends on the interference resistance of the modulated signal, and is represented by the number of repetitions N. FIG. 3A shows a state of repeating three zones (cells) (N = 3). At this time, in each zone (cell) obtained by dividing the service area of the system into small areas, channel groups f 1 , f 2 ... f obtained by dividing the frequency band assigned to the system are provided.
N is repeatedly assigned. In FIG. 3A, adjacent zones (cells) are mutually interference zones (cells), and the same channel is not assigned. Such a method
It is called Fixed Channel Arrangement (FCA).
【０００３】ＦＣＡに対して、各ゾーン（セル）にはそ
のシステム周波数帯域のすべてのチャネルを割り当て、
一定の規則によってチャネルをアサイン（割り当て）す
るダイナミックチャネルアサイン（ＤＣＡ）が知られて
いる。ＤＣＡとして、干渉レベルが一定以下となるチャ
ネルを探索し、最初に見つけたチャネルをアサインする
ファーストアベイラブルがよく知られている。さらに、
学習効果を導入したものとして、チャネル棲み分け方式
が知られている。これらは干渉量の大小を測定し、空い
ているチャネルを利用しているものであり、すべてのチ
ャネルがすでに使用されている場合には呼損となる。For FCA, each zone (cell) is assigned all channels of its system frequency band,
Dynamic channel assignment (DCA) is known in which channels are assigned according to a certain rule. As the DCA, the first available is a well-known method in which a channel whose interference level is below a certain level is searched and the channel found first is assigned. further,
A channel segregation method is known as one that introduces a learning effect. These measures the magnitude of the amount of interference and utilize the vacant channels. If all channels are already in use, a call loss occurs.
【０００４】このようにすべてのチャネルが使用中であ
っても、チャネルの再配置によって空きチャネルを作る
ことができる場合がある。セル（ゾーン）Ｚi で呼が発
生したとき、各セルでのチャネルＦ1 ，Ｆ2 ，Ｆ3 の使
用状況が例えば図３Ｂに示すようにあったとすると、つ
まりセルＺi の隣接（干渉）セルＺ1 でチャネルＦ1,Ｆ
2 を、セルＺ2 でチャネルＦ2 ，セルＺ3 ，Ｚ4 ではそ
れぞれチャネルＦ2 ，Ｆ3 を使用中であったとすると、
セルＺi に対する干渉セルにすべてのチャネルＦ1 ，Ｆ
2 ，Ｆ3 が割り当てられてあり、セルＺi にチャネルを
割り当てることはできない。しかし図３Ｃに示すよう
に、セルＺ1 にはチャネルＦ1 とＦ3 に、セルＺ2 には
チャネルＦ3 に、セルＺ5 ，Ｚ6 ，Ｚ7 にそれぞれチャ
ネルＦ2 ，Ｆ3 ，Ｆ1 にそれぞれ再割り当てを行えば、
セルＺi の干渉セルＺ1 ，Ｚ2 ，Ｚ 3 ，Ｚ4 はチャネル
Ｆ1 ，Ｆ2 のいずれかしか使用していないことになり、
セルＺi でチャネルＦ3 を割り当てることができる。こ
のような再配置をすれば呼損率が減るので、チャネルの
時間的使用効率が向上し、周波数をさらに有効に利用で
きることになる。Thus, all channels are in use.
Even if you rearrange the channels to make free channels
You may be able to. Cell (zone) ZiMake a call with
Channel F in each cell when alive1, F2, F3Messenger of
If the usage situation is as shown in FIG. 3B, for example,
Maricell ZiAdjacent (interference) cell Z1At channel F1,F
2In cell Z2At channel F2, Cell Z3, ZFourSo so
Channel F each2, F3If you were using
Cell ZiInterfering cells against all channels F1, F
2, F3Is assigned to cell ZiChannel to
It cannot be assigned. But as shown in Figure 3C
And cell Z1To channel F1And F3And cell Z2To
Channel F3And cell ZFive, Z6, Z7To each
Flannel F2, F3, F1If you reassign each to
Cell ZiInterfering cell Z1, Z2, Z 3, ZFourIs the channel
F1, F2You are only using one of the
Cell ZiAt channel F3Can be assigned. This
If you rearrange like
The time use efficiency is improved, and the frequency can be used more effectively.
I will be able to do it.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このチ
ャネルの再配置をいかに実行するかの具体的な方法につ
いてはあまり検討例がない。従来の検討は、再配置の効
果について検討したものであり、具体的な再配置の手順
は明確ではなかった。例えば、周辺セルで１局だけが使
用しているチャネルを検索して再配置する方法が知られ
ているが、そのようなチャネルをどのようにして検索す
るのかは具体的に論じられていない。基地局が管理して
いるチャネルマネジメントシステムをネットワーク上で
管理して、使用中のチャネルを集中制御的にリアルタイ
ムのデータベースにファイルしてあれば容易に検索でき
る。しかしながら、将来の移動通信システムではマイク
ロセル化が進み、それに伴って自律分散的な制御に移行
すると考えられ、集中的なリアルタイムのデータベース
管理とは整合性がよくないという欠点があった。However, there are not many studies on the specific method of how to perform the channel relocation. In the conventional study, the effect of relocation was examined, and the specific relocation procedure was not clear. For example, a method is known in which a channel used by only one station in a peripheral cell is searched and rearranged, but how to search such a channel is not specifically discussed. If the channel management system managed by the base station is managed on the network and the channels in use are centrally controlled and filed in a real-time database, it can be easily searched. However, in future mobile communication systems, it is considered that micro-cellization will progress and accordingly autonomous decentralized control will shift, which is not compatible with centralized real-time database management.
【０００６】[0006]
【課題を解決するための手段】上述の課題を解決するた
めに、この発明によるチャネル再割当方法は、あるチャ
ネルにおける干渉発生源が存在するセルを受信波から同
定し、その同定したセルの基地局に再割当要求を出し、
チャネル再割当要求を検知した基地局は当該チャネルの
再割り当てを行う。In order to solve the above-mentioned problems, a channel reallocation method according to the present invention identifies a cell in which an interference source in a certain channel exists from a received wave, and a base of the identified cell. Request reassignment to the station,
The base station that has detected the channel reallocation request reallocates the channel.
【０００７】[0007]
【作 用】基地局において、呼の発生があり、その呼に
チャネルを割り当てることができない場合などに、例え
ば基地局はあるチャネルの信号を受信して、その受信信
号からそのチャネルが使われているセルを同定手段によ
り同定し、次にその同定されたセルの基地局へチャネル
再割当要求のための信号を発信する。発信された信号は
前記同定されたセルの基地局の要求信号検出手段で検知
され、さらにチャネル再割当手段により当該チャネルの
再割り当て、つまりそのチャネルで使用中の通信に他の
空きチャネルを割り当てることが行われる。[Operation] When a call is generated at the base station and the channel cannot be assigned to the call, for example, the base station receives a signal of a certain channel and the channel is used from the received signal. The identifying unit identifies the existing cell, and then transmits a signal for requesting channel reassignment to the base station of the identified cell. The transmitted signal is detected by the request signal detection means of the base station of the identified cell, and the channel reassignment means reassigns the channel, that is, assigns another idle channel to communication used in the channel. Is done.
【０００８】同定手段には作用と結果が異なるいくつか
の構成法があり、各セルで固有のコードを送信信号に多
重化して送信したものを受信波から検出して、当該チャ
ネルを使用している基地局を同定する方法がある。ま
た、複数セルのコードを干渉キャンセル機能のある受信
手段で検出し、当該チャネルを使用している複数の基地
局を同定する方法もある。There are several ways of constructing the identification means, which differ in action and result, and a method in which a unique code is multiplexed in a transmission signal in each cell and transmitted, is detected from the received wave, and the corresponding channel is used. There is a method to identify the existing base station. There is also a method of detecting codes of a plurality of cells by receiving means having an interference canceling function and identifying a plurality of base stations using the channel.
【０００９】要求信号検出手段には、要求信号の種類に
よっていくつかの構成がある。まず他基地局へチャネル
再割当要求を行うために当該チャネルに要求信号として
特定変調波を送信する場合、要求されている基地局で
は、その特定変調波が受信されていることを検出する手
段を用いる方法がある。また、同定されたセルの基地局
に対して、当該基地局に当該チャネルの再割り当てを要
求する信号を制御線（回線）を介して発信する場合には
その制御線の送受信装置を用いる。The request signal detecting means has several configurations depending on the type of request signal. First, in the case of transmitting a specific modulated wave as a request signal to the channel in order to make a channel re-allocation request to another base station, the requesting base station has a means for detecting that the specific modulated wave is being received. There is a method to use. When a signal requesting the base station to reallocate the channel is transmitted to the base station of the identified cell through the control line (line), the transmitting / receiving device of the control line is used.
【００１０】この発明は従来の技術と以下の点が異な
る。 （１）受信波から、信号を検出してそのチャネルが使用
されているセルを同定する。 （２）同一チャネルを使用するセルが複数ある場合に
は、干渉キャンセル機能のある受信機で、複数の信号を
分離して、それぞれの信号が使用されている各セルを同
定する。The present invention differs from the prior art in the following points. (1) The signal is detected from the received wave to identify the cell in which the channel is used. (2) When there are a plurality of cells using the same channel, a receiver having an interference cancellation function separates a plurality of signals and identifies each cell in which each signal is used.
【００１１】（３）同定されたセルに再割当要求信号を
送出するために、当該チャネルに特定変調信号を送出す
ることにより行う。 （４）同定されたセルに、再割当要求信号を制御線を介
して送出する。(3) In order to send a reallocation request signal to the identified cell, this is done by sending a specific modulation signal to the channel. (4) Send a reallocation request signal to the identified cell through the control line.
【００１２】[0012]
【実施例】請求項９の発明の実施例を図１Ａに示す。基
地局において、入力端子１１からの信号は送信機１２で
搬送波を変調し、送信機１２の出力は送受共用分波器１
３とアンテナ１４を介して送信される。一方、アンテナ
１４で受信された受信波は分波器１３を介して受信機１
５に入力され、受信機１５で増幅・復調されたのち出力
端子１６から出力される。Embodiment An embodiment of the invention of claim 9 is shown in FIG. 1A. In the base station, the signal from the input terminal 11 modulates the carrier wave by the transmitter 12, and the output of the transmitter 12 is the duplexer 1 for both transmission and reception.
3 and antenna 14 are transmitted. On the other hand, the received wave received by the antenna 14 is passed through the demultiplexer 13 to the receiver 1
5 is input to the receiver 5, amplified and demodulated by the receiver 15, and then output from the output terminal 16.
【００１３】受信機１５は同定手段１７に受信レベル信
号Ｅと復調信号の同相成分Ｉと直交成分Ｑを送出してい
る。同定手段１７は、その基地局、つまり当該セルでは
使用していない通信チャネルの受信レベル信号から、そ
の通信チャネルを干渉セルが使用していると判断する
と、受信機１５の復調信号Ｉ，Ｑから、その通信チャネ
ルを用いているセルを同定する。呼を設定する必要があ
り、かつ同定手段１７が空きチャネルを見つけられない
ときには、前記通信チャネルを用いていると同定された
セルにチャネル再割り当て要求信号を送出する。図１Ａ
ではその要求信号を制御線１８を用いて行っており、そ
の再割当要求信号には前記通信チャネルを示す信号も付
加されている。The receiver 15 sends the reception level signal E, the in-phase component I and the quadrature component Q of the demodulated signal to the identifying means 17. If the identifying means 17 determines that the interfering cell is using the communication channel from the reception level signal of the communication channel that is not used in the base station, that is, the cell, the identifying means 17 detects the demodulated signals I and Q of the receiver 15. , Identify the cell using the communication channel. When a call needs to be set up and the identifying means 17 cannot find a free channel, it sends a channel reassignment request signal to the cell identified as using the communication channel. Figure 1A
The request signal is sent using the control line 18, and the signal indicating the communication channel is also added to the reallocation request signal.
【００１４】この例では、他の基地局からのチャネル再
割当要求信号も制御線１９を介して入力される場合を示
している。この要求信号は要求信号検出手段２１に入力
され、要求信号検出手段２１は要求信号を検出するとチ
ャネル割当手段２２にチャネル再割り当て処理を行わせ
る。つまり受信機１５の受信通信チャネルをスキャニン
グしてその通信チャネルの受信レベルを測定する。その
測定結果から同定手段１７が空き通信チャネルと判定し
た通信チャネルに前記要求信号の通信チャネルから移行
するよう、チャネル割当手段２２は送信機１２と受信機
１５を制御する。In this example, a case where a channel reassignment request signal from another base station is also input via the control line 19 is shown. This request signal is input to the request signal detecting means 21, and when the request signal detecting means 21 detects the request signal, it causes the channel allocating means 22 to perform the channel reallocation process. That is, the reception communication channel of the receiver 15 is scanned and the reception level of the communication channel is measured. From the measurement result, the channel allocating means 22 controls the transmitter 12 and the receiver 15 so that the identifying means 17 shifts from the communication channel of the request signal to the communication channel determined to be an idle communication channel.
【００１５】前記再割当要求信号を送出した基地局は、
前記チャネル再割り当てを行った基地局からの通知を受
けて、または適当な時間後に、前記再割当要求チャネル
に呼を設定できるかを調べた後に、可能であればその呼
設定を行う。上述したように受信通信チャネルからその
通信チャネルが利用されているセルを同定するために
は、図１Ｂに示すように各セルに固有のコード２５を送
信データ２６の前に配置して多重化して送信する。受信
機１５が復調した信号のうち、ゾーン固有コード２５に
相当する部分を同定手段１７に送出する。このためには
受信機１５に他基地局からの信号に対する同期検波回路
などが必要である。同定手段１７は検波された固有コー
ド２５からセルを同定する。The base station which has transmitted the reallocation request signal,
After receiving a notification from the base station that performed the channel reassignment, or after a suitable time, it is checked whether or not the call can be set up on the reassignment request channel, and then the call setup is performed if possible. As described above, in order to identify the cell using the communication channel from the reception communication channel, as shown in FIG. 1B, the code 25 unique to each cell is placed before the transmission data 26 and multiplexed. Send. The part of the signal demodulated by the receiver 15 that corresponds to the zone-specific code 25 is sent to the identifying means 17. For this purpose, the receiver 15 needs a synchronous detection circuit for signals from other base stations. The identification means 17 identifies a cell from the detected unique code 25.
【００１６】受信チャネルが１波の場合には通常の復調
処理によって、容易に固有コード２５を抽出することが
できるが、同一通信チャネルが同時に複数波受信されて
いるときには通常の復調器では固有コード２５を復調す
ることができない。したがって、周囲で１局のみが使用
している通信チャネルを検索するのであればこの方法で
十分である。固有コード２５が抽出できないときには、
周囲で２局以上が当該通信チャネルを利用していると判
定する。When the reception channel is one wave, the unique code 25 can be easily extracted by the normal demodulation process. However, when a plurality of waves of the same communication channel are simultaneously received, the unique code is obtained by the normal demodulator. 25 cannot be demodulated. Therefore, this method is sufficient for searching for a communication channel used by only one station in the surroundings. When the unique code 25 cannot be extracted,
It is determined that two or more stations are using the communication channel in the vicinity.
【００１７】周囲２つ以上のセルで使用している通信チ
ャネルの受信波から固有コード２５を抽出できる方法の
例を図２Ａに示す。受信機１５の復調信号Ｉ／Ｑには２
つの受信波が重畳されているとする。この受信機１５で
はそれらの信号候補を最尤系列推定手段（ＭＬＳＥ）３
１からの符号候補をもとに変調器３２，３３で各２系列
の符号候補により搬送波を変調し、これら変調出力をト
ランスバーサルフィルタ３４，３５でそれぞれの受信波
伝送路に変動を与えて受信波レプリカを生成する。端子
３６からの受信波信号から差回路３７，３８でそれぞれ
受信波レプリカを差し引き、その残差をもとに制御部３
９でトランスバーサルフィルタ３４，３５を制御してフ
ェージング変動に追従させている。一方、前記残差の２
乗値を用いて符号候補系列を最尤系列推定手段３１で２
つの受信波の復調符号Ｓ1 とＳ2を抽出して出力してい
る。このようにして、２つの受信波の各固有コードを抽
出することができる。同時受信波が２つ以上の場合も同
様にして各受信波のセルを同定することができる。FIG. 2A shows an example of a method of extracting the unique code 25 from the received wave of the communication channel used in two or more surrounding cells. 2 for the demodulated signal I / Q of the receiver 15.
It is assumed that two received waves are superposed. In this receiver 15, those signal candidates are identified by the maximum likelihood sequence estimation means (MLSE) 3
Based on the code candidates from 1, the modulators 32 and 33 modulate the carrier wave with the code candidates of each two series, and the modulated outputs are received by the transversal filters 34 and 35 while varying the respective reception wave transmission paths. Generate wave replicas. The reception wave replicas are subtracted from the reception wave signals from the terminal 36 by the difference circuits 37 and 38, respectively, and the control unit 3 is based on the residuals.
At 9, the transversal filters 34 and 35 are controlled to follow the fading fluctuation. On the other hand, the residual of 2
The maximum likelihood sequence estimation means 31 calculates the code candidate sequence as 2 using the power value.
Demodulated codes S 1 and S 2 of one received wave are extracted and output. In this way, the unique codes of the two received waves can be extracted. Even when there are two or more simultaneous reception waves, the cell of each reception wave can be similarly identified.
【００１８】このように同一通信チャネルを複数の基地
局で使用しており、これらの各基地局の同定を行うこと
ができた場合は、その同定されたすべての基地局に対し
て、当該チャネルの再割当要求信号を送出する。これら
複数の基地局のうち受信レベルが所定値以上、または最
も高いものについてのみ、チャネル再割当要求信号を出
し、他の基地局は遠方にあり、通信に大きく影響する干
渉とならない場合はチャネル再割当要求信号を出さな
い。As described above, when the same communication channel is used by a plurality of base stations and each of these base stations can be identified, the channel concerned is identified for all the identified base stations. The re-allocation request signal is transmitted. The channel reassignment request signal is issued only for the one with the reception level higher than or equal to the predetermined value or the highest among these base stations, and when the other base stations are distant and there is no interference that greatly affects communication, the channel reassignment is performed. Does not issue an allocation request signal.
【００１９】図１Ａでは制御線１９を介してチャネル再
配置要求信号が入力されているが、このような制御線を
使わない方法を図１Ａの破線４１と４２で示してある。
この場合、同定手段１７は直接送信機１２を用いて、チ
ャネル再配置をして欲しい通信チャネルに特定変調波を
送出する。特定変調波の具体例を図２Ｂに示す。この例
ではバースト的な信号を３回繰り返して送信している。
このとき当該通信チャネルを使用している移動機は、希
望波以外にこの特定変調波を同時に受信し、伝送特性が
劣化する。移動機の受信機では図２Ｃに示すように検波
器４５よりの検波出力を相関器４６に入力して、３回の
バースト信号を検出する。この検出信号をもとに判定器
４７が再配置要求信号の有無を判定する。要求信号があ
ると判定されたときは、その移動機は基地局にチャネル
再配置を例えば通信中制御信号伝送法により要求する。
前記同定された基地局が移動機と同一チャネルをＴＤＤ
（時分割デュープレックス）方式で通信している場合
は、前記特定変調波の送信波は同定された基地局に直接
受信され、特定変調波を検出することにより再割当要求
を知ることができる。In FIG. 1A, the channel rearrangement request signal is input through the control line 19, but a method not using such a control line is shown by broken lines 41 and 42 in FIG. 1A.
In this case, the identifying means 17 uses the direct transmitter 12 to send out the specific modulated wave to the communication channel for which the channel rearrangement is desired. A specific example of the specific modulated wave is shown in FIG. 2B. In this example, a burst-like signal is repeatedly transmitted three times.
At this time, the mobile station using the communication channel simultaneously receives the specific modulated wave in addition to the desired wave, and the transmission characteristic deteriorates. In the receiver of the mobile device, as shown in FIG. 2C, the detection output from the detector 45 is input to the correlator 46 to detect the burst signal three times. Based on this detection signal, the determiner 47 determines the presence or absence of the rearrangement request signal. When it is determined that the request signal is present, the mobile station requests the base station to relocate the channel by, for example, the control signal transmission method during communication.
The identified base station performs TDD on the same channel as the mobile station.
When communicating in the (time division duplex) system, the transmission wave of the specific modulation wave is directly received by the identified base station, and the reallocation request can be known by detecting the specific modulation wave.
【００２０】以上、チャネル再配置でチャネル移行のた
めの制御は基地局または移動局のどちらで行ってもよ
い。As described above, either the base station or the mobile station may perform the control for channel shift in the channel rearrangement.
【００２１】[0021]
【発明の効果】以上述べたように、この発明によれば受
信された信号からセルを同定し、そのセルの基地局にチ
ャネル再配置の要求を行うので、チャネル使用状況を集
中制御システムで管理する必要がない。したがって、マ
イクロセル化した自律分散制御システムに特に有効であ
る。As described above, according to the present invention, the cell is identified from the received signal and the base station of the cell is requested to relocate the channel, so that the channel control condition is managed by the centralized control system. You don't have to. Therefore, it is particularly effective for an autonomous distributed control system in which microcells are used.
【図１】Ａは請求項９の発明の実施例を示すブロック
図、Ｂは基地局（セル）の固有コードの多重化の例を示
す図である。FIG. 1A is a block diagram showing an embodiment of the invention of claim 9 and FIG. 1B is a diagram showing an example of multiplexing unique codes of a base station (cell).
【図２】Ａは干渉キャンセラによる同一チャネルを使用
している複数局の同定法の例を示すブロック図、Ｂは再
割当要求信号に用いる特定変調波の例を示す図、Ｃは特
定変調波の検出回路の例を示すブロック図である。2A is a block diagram showing an example of an identification method of a plurality of stations using the same channel by an interference canceller, FIG. 2B is a diagram showing an example of a specific modulated wave used for a reallocation request signal, and C is a specific modulated wave. 3 is a block diagram showing an example of the detection circuit of FIG.
【図３】Ａはセルラ方式のセルとチャネルとの配置例を
示す図、Ｂはチャネル再配置前のセルとチャネルの例を
示す図、Ｃはチャネル再配置後のセルとチャネルの例を
示す図である。FIG. 3A is a diagram showing an example of arrangement of cells and channels of a cellular system, B is a diagram showing an example of cells and channels before channel rearrangement, and C is an example of cells and channels after channel rearrangement. It is a figure.
Claims (9)
法において、 基地局で呼を設定する空き通信チャネルを見つけられな
いときに、他セルの使用通信チャネルを受信して、その
受信波からその通信チャネルを使用している基地局を同
定し、 その同定された基地局に、その通信チャネルについての
再割当要求信号を送出し、 その再割当要求信号を検知した基地局は、その通信チャ
ネルの通信に他の空き通信チャネルを再割当てすること
を特徴とする移動通信用チャネル再割当方法。1. A mobile communication cellular channel reassignment method, wherein when a base station cannot find a free communication channel for setting up a call, it receives a communication channel used by another cell and communicates from the received wave. The base station that is using the channel is identified, the reallocation request signal for the communication channel is sent to the identified base station, and the base station that detects the reallocation request signal communicates with the communication channel. A method for reassigning a channel for mobile communication, characterized in that another free communication channel is reassigned.
通信チャネルの再割当てを行った後、上記再割当要求を
行った基地局は空きとなった上記使用通信チャネルに呼
設定を行うことを特徴とする請求項１記載の移動通信用
チャネル再割当方法。2. After the base station that has detected the reassignment request reassigns the communication channel, the base station that has made the reassignment request performs call setup on the unused communication channel. The channel reassignment method for mobile communication according to claim 1, wherein
有のコードを多重化して送信し、上記基地局の同定を、
受信波から固有コードを検出して行うことを特徴とする
請求項１記載の移動通信用チャネル再割当方法。3. A code specific to the base station is multiplexed and transmitted to the communication channel used, and the identification of the base station is performed.
2. The mobile communication channel reassignment method according to claim 1, wherein the unique code is detected from the received wave.
されて複数の基地局が同定されると、その同定された各
基地局に対して上記通信チャネルの再割当要求信号を送
出することを特徴とする請求項３記載の移動通信用チャ
ネル再割当方法。4. When a plurality of unique codes are detected from the received wave and a plurality of base stations are identified, the communication channel reallocation request signal is transmitted to each of the identified base stations. The mobile communication channel reassignment method according to claim 3, characterized in that:
されて複数の基地局が同定されると、その同定された基
地局中の最も近い基地局に対してのみ上記通信チャネル
の再割当要求信号を送出することを特徴とする請求項３
記載の移動通信用チャネル再割当方法。5. When a plurality of unique codes are detected from the received wave and a plurality of base stations are identified, the communication channel reassignment request is made only to the closest base station among the identified base stations. 4. Sending a signal.
A method for reassigning a channel for mobile communication as described.
出は、上記受信した他セルの使用通信チャネルと同一チ
ャネルで特定変調信号を送信し、その特定変調信号を、
上記他セルの使用通信チャネルを時分割デュープレック
ス方式で使用している移動局または基地局で検出して、
再割当要求信号を検出することを特徴とする請求項１乃
至５のいずれかに記載の移動通信用チャネル再割当方
法。6. The base station transmits the reallocation request signal by transmitting a specific modulation signal on the same channel as the received communication channel of another cell, and transmitting the specific modulation signal,
Detecting the communication channel used by the other cell in the mobile station or base station using the time division duplex method,
6. The mobile communication channel reallocation method according to claim 1, wherein a reallocation request signal is detected.
出は、上記受信した他セルの使用通信チャネルと同一チ
ャネルで特定変調信号を送信し、上記特定変調信号を検
出した移動局から再割当要求信号をその通信中の基地局
へ送信して行うことを特徴とする請求項１乃至５のいず
れかに記載の移動通信用チャネル再割当方法。7. The base station transmits the reallocation request signal by transmitting a specific modulation signal on the same channel as the received communication channel of another cell, and re-transmitting from the mobile station which has detected the specific modulation signal. 6. The mobile communication channel reallocation method according to claim 1, further comprising transmitting an allocation request signal to a base station in communication therewith.
出は制御線を通じて行うことを特徴とする請求項１乃至
５のいずれかに記載の移動通信用チャネル再割当方法。8. The mobile communication channel reallocation method according to claim 1, wherein the base station transmits the reallocation request signal through a control line.
要求ごとに空き通信チャネルを探し、空き通信チャネル
が見つけられないとチャネル再割当要求を送出する基地
局装置において、 上記空き通信チャネルが見つからないと他セルの使用通
信チャネルを受信して、その受信波からその通信チャネ
ルを使用している基地局を同定し、その同定された基地
局へその通信チャネルについての再割当要求信号を送出
する同定手段と、 他の基地局からの再割当要求信号を検出する要求信号検
出手段と、 上記再割当要求信号を検出すると、その通信チャネルの
通信に他の空き通信チャネルを再割り当てするチャネル
再割当手段と、 を具備することを特徴とするチャネル再割当機能を有す
るセルラ方式移動通信の基地局装置。9. A base station device used in a mobile communication cellular system, which searches for an empty communication channel for each call setting request, and sends out a channel reassignment request if no empty communication channel is found, wherein the empty communication channel is found. If not, the communication channel used by another cell is received, the base station using the communication channel is identified from the received wave, and the reallocation request signal for the communication channel is sent to the identified base station. Identification means, request signal detection means for detecting a reallocation request signal from another base station, and channel reallocation for reallocating another idle communication channel for communication of the communication channel when the reallocation request signal is detected A base station apparatus for cellular mobile communication having a channel reallocation function, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01516095A JP3314380B2 (en) | 1995-02-01 | 1995-02-01 | Mobile communication channel reassignment method and base station apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01516095A JP3314380B2 (en) | 1995-02-01 | 1995-02-01 | Mobile communication channel reassignment method and base station apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08214362A true JPH08214362A (en) | 1996-08-20 |
| JP3314380B2 JP3314380B2 (en) | 2002-08-12 |
Family
ID=11881058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01516095A Expired - Fee Related JP3314380B2 (en) | 1995-02-01 | 1995-02-01 | Mobile communication channel reassignment method and base station apparatus |
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| Country | Link |
|---|---|
| JP (1) | JP3314380B2 (en) |
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