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JPS6326129A - Control method for plural base stations - Google Patents

Control method for plural base stations

Info

Publication number
JPS6326129A
JPS6326129AJP61170186AJP17018686AJPS6326129AJP S6326129 AJPS6326129 AJP S6326129AJP 61170186 AJP61170186 AJP 61170186AJP 17018686 AJP17018686 AJP 17018686AJP S6326129 AJPS6326129 AJP S6326129A
Authority
JP
Japan
Prior art keywords
base station
electric field
base stations
communication
incoming
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.)
Pending
Application number
JP61170186A
Other languages
Japanese (ja)
Inventor
Susumu Nakabayashi
中林 進
Hideo Ikeda
英男 池田
Akihisa Mori
明久 森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Communication Equipment Co Ltd
Original Assignee
Toyo Communication Equipment Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Communication Equipment Co LtdfiledCriticalToyo Communication Equipment Co Ltd
Priority to JP61170186ApriorityCriticalpatent/JPS6326129A/en
Publication of JPS6326129ApublicationCriticalpatent/JPS6326129A/en
Pendinglegal-statusCriticalCurrent

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Abstract

PURPOSE:To prevent the deterioration of quality of communication by comparing the result of detection set from respective base stations and selecting a sole base station giving the maximum incoming electric field or the highest communication quality or any of base stations giving a prescribed incoming electric field or over or a prescribed talking quality or over to keep the communication. CONSTITUTION:As a method sectioning a noise level, e.g., a monitor receiver demodulation output is amplified up to a prescribed level and rectified into a DC voltage, it is sectioned in several steps and they are identified and a tone signal has to be generated in response to the respective sectional voltage. The processing above is executed not only in a base station 6-1 but also in all base stations having an incoming signal. The tone signal sent in this way is collected in a centralized controller 7, a noise level in each monitor receiver demodulation output is compared by identifying each tone signal frequency and a minimum noise level is discriminated to be the highest incoming electric field. The operator operates a base station selection switch 9 to send an antenna switching signal only to a base station relating to the maximum incoming electric field.

Description

Translated fromJapanese

【発明の詳細な説明】(産業上の利用分野)本発明は複数基地局を介して移動局等と通信を行う場合
の前記基地局の制御方法に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of controlling a base station when communicating with a mobile station or the like via a plurality of base stations.

(従来技術)従来から無線通信ゾーンの不感地域救済方法として無線
通信基地局以外に一つ又は複数の前進基地局を設けてこ
れらを前記基地局或は通信統制所から遠隔°制御するこ
とが行なわれている。
(Prior Art) Conventionally, as a method for relieving dead areas in wireless communication zones, one or more forward base stations have been installed in addition to wireless communication base stations, and these have been remotely controlled from the base station or communication control center. It is.

第6図(alはこの方法の一例を示す模式図であって、
基地局1の他に通信ゾーン内の不感地帯に対応して前進
基地局2,3を配置するとともにこれら基地局1,2及
び3を通信統制所4にて遠隔制御するよう構成したもの
である。
FIG. 6 (al is a schematic diagram showing an example of this method,
In addition to the base station 1, forward base stations 2 and 3 are arranged corresponding to dead zones within the communication zone, and these base stations 1, 2, and 3 are remotely controlled by a communication control center 4. .

このようにすれば、基地局1からの電波が届かない地域
に位置する移動局5に対しては最寄の前進基地局3を介
して通信を行うことができる。
In this way, it is possible to communicate with the mobile station 5 located in an area where radio waves from the base station 1 cannot reach via the nearest forward base station 3.

しかし、上述した如く複数の基地局を配置した通信シス
テムを同一周波数にて運用する場合、第6図(blに示
すように前進基地局2と3の両方から発する電波がはV
同一レベルにて到達するゾーンに移動局5が位置すると
両者の電波が重複して干渉を生じ両電波の周波数差がビ
ートとして復調され極めて聴きづらいのみならず。
However, when operating a communication system with multiple base stations arranged at the same frequency as described above, the radio waves emitted from both forward base stations 2 and 3 are
If the mobile station 5 is located in a zone where the two radio waves reach each other at the same level, the two radio waves overlap, causing interference, and the frequency difference between the two radio waves is demodulated as a beat, which is not only extremely difficult to listen to.

電界分布にもフェージングを生じ著しく通信品質を悪化
せしめると云う不具合を発生する。
Fading also occurs in the electric field distribution, causing problems such as significantly deteriorating communication quality.

このため、従来は基地局送信機に恒温槽付き等の高安定
度発掘器を採用することによって互いの基地局の発振周
波数差を所要値以下9例えば100Hz以下にするとと
もに各移動局の受信復調信号をtooHz以下をカット
する高域フィルタを介して聴くようにしていた。
For this reason, in the past, the base station transmitter was equipped with a high-stability excavator equipped with a thermostatic oven to reduce the oscillation frequency difference between base stations to a required value, for example, 100 Hz or less, and also to reduce the reception demodulation of each mobile station. I was listening to the signal through a high-pass filter that cuts frequencies below too Hz.

しかしながら、この方法によっても上述したフェージン
グは除去することができなかった。
However, even with this method, the above-mentioned fading could not be removed.

故に、このようなフェージングによる通信回線の不安定
をきらう通信系に於いては各基地局の割当て周波数を互
いに異なるものとし夫々の基地局のカバーゾーンに移行
するごとに自動的或は手動によって周波数を切替えて運
用するようにしていた。
Therefore, in a communication system where instability of communication lines due to such fading is a concern, the frequency assigned to each base station should be different from each other, and the frequency should be changed automatically or manually each time the base station moves to its coverage zone. I was trying to switch to and operate it.

しかしながら、この方法は多周波を必要とするため電波
の有効利用を疎害するばかりでなく手動切替えの煩しさ
を除去するためマルチチャンネルアクセス方式(MCA
)の如く自動切替方式を採用せんとすればシステムが極
めて複雑高価となると云う問題があった。
However, since this method requires multiple frequencies, it not only hinders the effective use of radio waves, but also uses a multichannel access method (MCA) to eliminate the hassle of manual switching.
) If an automatic switching system were not adopted, there was a problem that the system would be extremely complicated and expensive.

(発明の目的)本発明はこのような従来の複数基地局を配置した無線通
信システムの問題を解決するためになされたものであっ
て簡単な構成によって同一周波数による運用を可能とし
た複数基地局の制御方法を提供することを目的とする。
(Purpose of the Invention) The present invention was made to solve the problems of the conventional wireless communication system in which multiple base stations are arranged, and it provides multiple base stations that can operate on the same frequency with a simple configuration. The purpose is to provide a control method for

(発明の概要)本発明はこの目的を達成するため、複数の基地局に到達
する着信電界又はその結果の復調出力の通話品質1例え
ば信号対雑音比(S/N)或は復調信号中に含まれる雑
音成分又は受信機のリミッタ電流値を検出するとともに
この検出結果を通信統制所等の制御器に伝送し、核部に
於いて夫々の基地局から伝送された検出結果を比較して
最大着信電界或は最高の通話品質をもたらす唯一の基地
局又は所定着信電界以上或は所定通話品質以上をもたら
すもののうちいづれか一つの基地局を選択して通信を行
うよう構成する。
(Summary of the Invention) In order to achieve this object, the present invention improves the speech quality of the incoming electric field reaching a plurality of base stations or the resulting demodulated output, such as the signal-to-noise ratio (S/N) or the demodulated signal. The included noise components or the limiter current value of the receiver are detected, and the detection results are transmitted to a controller such as a communications control center, and the core section compares the detection results transmitted from each base station and determines the maximum value. The configuration is such that communication is performed by selecting either the only base station that provides an incoming electric field or the highest call quality, or one that provides an incoming call electric field or higher or a predetermined call quality or higher.

(実施例)以下本発明を図示した実施例に基づいて詳細に説明する
(Example) The present invention will be described in detail below based on an illustrated example.

第1図は本発明に係かる通信システムの一実施例を示す
ブロック図である。
FIG. 1 is a block diagram showing an embodiment of a communication system according to the present invention.

同図に於いて6−1.6−2.・・・・・・、6−nは
通信ゾーン内に散在せしめた基地局であって、夫々の基
地局は6−1を例にとれば、空中線ANT 1とFM送
受信機TRXI、モニタ用FM受信機RXI  及び制
御器C0NTlとを備え、空中線ANTIには切替スイ
ッチA−8W1を挿入し前記制御器C0NT1の出力に
よって空中線を送受信機TRXIとモニタ用受信機RX
I とに切替えるよう構成する。
In the same figure, 6-1.6-2. ..., 6-n are base stations scattered within the communication zone, and each base station, taking 6-1 as an example, has an antenna ANT 1, an FM transceiver TRXI, and a monitor FM. A selector switch A-8W1 is inserted into the antenna ANTI, and the antenna is connected to the transmitter/receiver TRXI and the monitor receiver RX by the output of the controller C0NT1.
It is configured to switch to I.

又、このように構成したn個の基地局の各制御器と通信
統制所に設は九集中制御装置7とを通信ケーブル8−1
.8−2.・・・・・・、8−n1cよって接続し、こ
の集中制御装置7にはモニタスピーカSP、マイクロホ
ンM、ブレススイッ+PTT及び基地選択スイッチ9を
付加する。
Further, each controller of the n base stations configured in this manner and the nine centralized control devices 7 installed in the communication control center are connected by a communication cable 8-1.
.. 8-2. ..., 8-n1c, and this central control device 7 is provided with a monitor speaker SP, a microphone M, a breath switch +PTT, and a base selection switch 9.

このように構成した装置に於ける制御器C0NT1乃至
CON T nと集中制御装置7の機能及びシステム全
体の動作について以下詳細に説明する。
The functions of the controllers C0NT1 to CONTn and the central control device 7 and the operation of the entire system in the apparatus configured as described above will be explained in detail below.

今、基地局6−1に空中線ANTlを介して図示を省略
した移動局から着信があった場合を考えると、この信号
は待ち受は状態に於いてはアンテナスイッチA@SWI
を経てモニタ受信機RX1に導かれ、その復調出力が制
御器C0NT 1に入力する。
Now, suppose that the base station 6-1 receives an incoming call from a mobile station (not shown) via the antenna ANTl.
The demodulated output is input to the controller C0NT1.

この制御器C0NT lに於いてはモニタ受信機RXI
からの復調信号からF”M受信機特有の雑音信号を抽出
しそのレベルを監視しておきこの信号レベルを段階的に
区分けし、各区分に対応し念トーン信号を発生すると同
時に通信ケーブル8−1を介して集中制御装置に伝送す
る。
In this controller C0NTl, the monitor receiver RXI
A noise signal peculiar to the F"M receiver is extracted from the demodulated signal from the demodulated signal, its level is monitored, the signal level is divided into stages, and a tone signal corresponding to each division is generated. At the same time, the communication cable 8- 1 to the central control unit.

このときの雑音レベルの区分けの方法は9例えばモニタ
受信機復調出力を所定レベルまで増幅したのち整流して
得た直流電圧を数段階に区分して識別し、夫々の区分電
圧に石じて0,8 KHz、 ] KHz 、 1 、
 I KHz・・・・・・のトーン信号を発生すればよ
い。このような動作は基地局6−1のみならず着信信号
のあるすべての基地局に於いて行なわれる。
The method for classifying the noise level at this time is 9. For example, the DC voltage obtained by amplifying the demodulated output of a monitor receiver to a predetermined level and then rectifying it is divided into several stages and identified. ,8 KHz, ] KHz, 1,
It is sufficient to generate a tone signal of I KHz. Such operations are performed not only at base station 6-1 but also at all base stations that have incoming signals.

このようにして伝送されたトーン信号は集中制御装置7
に集められ核部に於いて各々のトーン信号周波数を識別
することによって各モニタ受信機復調出力中の雑音レベ
ルを比較し、そのうち雑音レベルが最小のものを着信電
界が最高のものであると判断する。
The tone signal transmitted in this way is transmitted to the central control device 7.
By identifying the frequency of each tone signal collected at the core, the noise level in the demodulated output of each monitor receiver is compared, and the one with the lowest noise level is determined to have the highest incoming electric field. do.

周知の如(FM受信機の復調信号は@2図(a)に示す
如く受信機入力電界レベルが大きくなるにつれて雑音成
分Nが減少しある一部レベルで飽和する。
As is well known, the demodulated signal of the FM receiver is saturated at a certain level as the receiver input electric field level increases as the receiver input electric field level increases, as shown in Figure 2 (a).

従って、雑音レベルを監視すればその結果から着信電界
強度が推定できるから各基地局に於ける着信電界強度の
比較を行うのは容易である。
Therefore, if the noise level is monitored, the incoming field strength can be estimated from the result, so it is easy to compare the incoming field strength at each base station.

同、しかしFM受信機の雑音レベルは着信電界の増大に
ともなって減少し非常に小さなレベルとなるから、この
雑音レベルによって着信電界強度を区分するのが困難と
なる場合がある。
However, since the noise level of the FM receiver decreases to a very small level as the incoming electric field increases, it may be difficult to distinguish the incoming electric field strength based on this noise level.

例えば着信電界レベルが−20d B pのとき雑音整
流電圧が3vであったものが電界強度OdBμで20d
B抑圧されて0.3V、更に電界強度が+10d B 
tt  になると約0.03Vと極めて微少電圧となっ
てしまうからこれらの電圧を識別するのは現実的には非
常に困難である。
For example, when the incoming electric field level is -20dBp, the noise rectified voltage is 3V, but the electric field strength OdBμ is 20dB.
B is suppressed by 0.3V, and the electric field strength is +10dB
When the voltage reaches tt, it becomes an extremely small voltage of about 0.03V, so it is actually very difficult to distinguish between these voltages.

そこで、この具合を避けるために例えば着信電界レベル
が小さく雑音レベルが大きい範囲は雑音レベルによって
、又所定以上の着信電界に於いてはリミッタ電流、即ち
IF増幅器出力の一部を整流して得た直流電圧(以下こ
れをリミッタ電圧と云う)によりで区分すればよい。
Therefore, in order to avoid this situation, for example, the range where the incoming electric field level is small and the noise level is large is determined by the noise level, and in the incoming electric field above a certain level, the limiter current, that is, a part of the IF amplifier output, is rectified. They may be classified based on DC voltage (hereinafter referred to as limiter voltage).

第2図(blに受信機のリミッタ電圧と着信電界強度の
関係特性の一例を示す。図かられかる如くある範囲にて
着信電界強度に正比例してリミッタ電圧が大きくなるか
らこの値によって着信電界強度を区分することができる
Figure 2 (bl) shows an example of the relational characteristics between the limiter voltage of the receiver and the incoming electric field strength. As shown in the figure, the limiter voltage increases in direct proportion to the incoming electric field strength within a certain range, so depending on this value, the incoming electric field Strength can be classified.

このようにして複数の基地局の着信電界強度を比較した
結果最も着信電界強度の大きい基地局を表示する。
In this way, as a result of comparing the incoming field strengths of a plurality of base stations, the base station with the highest incoming field strength is displayed.

そこで集中制御装置のオペレータは基地局選択スイッチ
9を操作することによって前記最大着信電界に係かる基
地局のみにアンテナ切替信号を送出すると共に集中制御
装置7に付したマイクロホンM、プレススイツ−y−P
TT 及UモニタスピーカSPを関係せしめる。
Therefore, the operator of the central control device operates the base station selection switch 9 to send an antenna switching signal only to the base station related to the maximum incoming electric field, and also transmits the antenna switching signal to the base station related to the maximum incoming electric field, and also connects the microphone M attached to the central control device 7, the press suite-y-P
TT and U monitor speaker SP are related.

この状態では前記選択した基地局のみが集中制御装置7
を介して接続され、そのアンテナスイッチA−8Wが送
受信機TRX側に切替わり。
In this state, only the selected base station is controlled by the central control device 7.
The antenna switch A-8W is switched to the transceiver TRX side.

プレススイッチPTTの操作によりマイクロホンM出力
信号を変調信号とした電波が発射される。
By operating the press switch PTT, radio waves with the microphone M output signal as a modulation signal are emitted.

このようにして移動局とブレストーク通信を行い終了時
には基地選択スイッチ9を操作してリセットすればすべ
ての基地局は待ち受は状態に復帰する。
In this manner, when the breath talk communication with the mobile station is completed, the base selection switch 9 is reset by operating the base selection switch 9, and all the base stations return to the standby state.

第3図は上述したシステムの機能を満たすために前記基
地局の制御器C0NTと集中制御装置7とに於いて行う
着信電界強度比較に使用するための装置の一実施例を示
すブロック図である。
FIG. 3 is a block diagram showing an embodiment of a device used for comparing the incoming electric field strength between the base station controller C0NT and the central control device 7 in order to fulfill the functions of the system described above. .

同図に於いて10は基地局制御器側、11は集中制御装
置側に夫々属するものであって1両者は通信ケーブル8
によって接続される。
In the figure, 10 belongs to the base station controller side, 11 belongs to the central control device side, and 1 and 1 are connected to the communication cable 8.
connected by.

先づ、基地局側制御器ではモニタ受信機のIF出力の一
部を増幅器と整流器とからなるリミッタ電圧回路12を
介して3つの電圧比較回路14.15.16の正極端子
に入力する。又前記モニタ受信機の復調出力の一部を数
百KHz以上を通過するフィルタHPFと整流器とから
なる雑音検出器13を介して′W、4の電圧比較回路1
7の負極端子に入力するとともに、これら4つの電圧比
較回路の他方入力端には基準電圧としてVl、V2.V
3及び■4を与えておく。
First, in the base station controller, a part of the IF output of the monitor receiver is inputted to the positive terminals of three voltage comparison circuits 14, 15, and 16 via a limiter voltage circuit 12 consisting of an amplifier and a rectifier. Further, a part of the demodulated output of the monitor receiver is passed through a noise detector 13 consisting of a filter HPF and a rectifier that passes frequencies of several hundred KHz or more, and then to a voltage comparator circuit 1 of 4'W.
7, and the other input terminals of these four voltage comparison circuits receive reference voltages Vl, V2 . V
Give 3 and ■4.

次にこれら4つの電圧比較回路の出力は4つのアンドゲ
ート18乃至21に入力し該アンドゲート出力によって
4つの低周波発掘器22乃至25出力端に挿入した4つ
のスイッチ26乃至29を制御する。又これらスイッチ
の出力はすべて一つの増幅器30を介して通信ケーブル
8に入力するが、前記電圧比較器出力、ア/ドゲート、
低周波発振器及びスイッチの接続関係は以下の通りであ
る。
Next, the outputs of these four voltage comparison circuits are input to four AND gates 18 to 21, and the outputs of the AND gates control four switches 26 to 29 inserted at the output terminals of four low frequency excavators 22 to 25. The outputs of these switches are all input to the communication cable 8 via one amplifier 30, but the voltage comparator output, the add gate,
The connection relationship between the low frequency oscillator and the switch is as follows.

即ち、アンドゲート18は4人カアンドゲートであって
夫々に前記4つの電圧比較器の各々の出力を入力すると
ともにこのアンドゲート18の出力によって低周波発振
器22の出力端に挿入したスイッチ26を制御する。
That is, the AND gate 18 is a four-person AND gate, which inputs the output of each of the four voltage comparators, and uses the output of the AND gate 18 to control the switch 26 inserted at the output terminal of the low frequency oscillator 22. Control.

又、同じく4人カアンドゲート19には前記アンドゲー
ト18の出力の一部をインバータ31を介したものと、
電圧比較器15,16,17 3つの出力とを入力し、
該アンドゲート19の出力によって第2の低周波発振器
23に付したスイッチ27を制御せしめ、更に3人カア
ンドゲート20には前記アンドゲート19の出力の一部
をインバータ22により極性発転した信号と電圧比較器
16.17計3つの信号を入力するとともに該アンドゲ
ート20の出力によづて第3の低周波発振器24の出力
端に挿入したスイッチ28を制御する。又残りのアンド
ゲート21け2人力を有するもので、これには前記アン
ドゲート20の出力をづンバータ33によりインバート
したものとW、4の電圧比較器17の出力とを入力し、
同様にこの出力によって第4の低周波発振器25に付し
たスイッチ29を夫々制御するよう接続する。
Similarly, the four-person AND gate 19 has a part of the output of the AND gate 18 passed through an inverter 31, and
Input the three outputs of voltage comparators 15, 16, 17,
A switch 27 attached to a second low frequency oscillator 23 is controlled by the output of the AND gate 19, and a signal obtained by inverting the polarity of a part of the output of the AND gate 19 is sent to the three-man AND gate 20. A total of three signals are inputted to the voltage comparators 16 and 17, and a switch 28 inserted at the output terminal of the third low frequency oscillator 24 is controlled based on the output of the AND gate 20. In addition, the remaining AND gate 21 has two manpowers, to which the output of the AND gate 20 inverted by the inverter 33 and the output of the voltage comparator 17 of W, 4 are input,
Similarly, the switches 29 attached to the fourth low frequency oscillator 25 are connected to be controlled by this output.

伺、前記4つの電圧比較回路14乃至170基準電圧値
としては2例えばVl=3V、V2=2V、Vs=lV
及びV4=0,5V の如く設定する。これらの数値の
意味は第4の電圧比較値V4=0.5Vによって着信電
界強度がOdBμv以上となって雑音整流出力が0.5
V以下であることを、又電圧比較回路16,15.14
によって夫々着信電界強度が+10dB〃V、+20d
BpV、+10dB〃V以上となってリミッタ電圧が各
々IV、2V、3Vを越えたことを検出し夫々の出力に
正電位を発生させるとともに次段のロジック回路を介し
て4つの低周波発振器に接続したスづフチ26乃至29
を制御する。
The reference voltage values of the four voltage comparison circuits 14 to 170 are 2, for example, Vl=3V, V2=2V, Vs=lV.
and V4=0.5V. The meaning of these values is that when the fourth voltage comparison value V4 = 0.5V, the incoming electric field strength becomes OdBμv or more, and the noise rectified output becomes 0.5V.
The voltage comparator circuits 16, 15.14
The incoming electric field strength is +10 dB〃V and +20 d, respectively.
BpV, +10dB〃V or more, detects that the limiter voltage exceeds IV, 2V, 3V, respectively, generates a positive potential at each output, and connects to four low frequency oscillators via the next stage logic circuit. Shita suzufuchi 26 to 29
control.

一方集中制御装置側に於いては2通信ケーブルを介して
伝送された低周波(トーン)信号を増幅器34により増
幅したのち前記4つのトーン信号周波数、f を乃至f
4に対応したパンドパによって直流化したのち表示・操
作部42に入力するよう構成する。
On the other hand, on the central control device side, the low frequency (tone) signal transmitted via the two communication cables is amplified by the amplifier 34, and then the four tone signal frequencies, f to f, are amplified by the amplifier 34.
The configuration is such that the signal is converted to direct current using a Pandopa compatible with 4 and then input to the display/operation section 42.

尚、該表示操作邪神は整流器出力によって該当するラン
プを点灯せしめる他、4つの整流器出力を4ビツト2進
数の符号化を行いこれを後述する基地局選択装置に出力
する機能を有する。
In addition to lighting a corresponding lamp using the rectifier outputs, the display operation device also has a function of encoding the four rectifier outputs into a 4-bit binary number and outputting it to a base station selection device to be described later.

このように構成した制御装置の動作を以下説明する。The operation of the control device configured in this way will be explained below.

先づ、基地局側制御器10のバイパスフィルタに入力す
るモニタ受信機の復調信号は前記第2図(atに於いて
説明した如く受信機への着信電界レベルに応じてFM受
信機特有の雑音信号レベルが変化するから、これをバイ
パスフィルタにて音声信号以上の高域雑音のみを抽出し
たのち整流して得た直流電圧値は着信電界強度に応じて
小さくなる。
First, the demodulated signal of the monitor receiver that is input to the bypass filter of the base station side controller 10 is affected by the noise peculiar to the FM receiver depending on the electric field level of the incoming signal to the receiver, as explained in FIG. Since the signal level changes, the DC voltage value obtained by extracting only high-frequency noise higher than the voice signal using a bypass filter and then rectifying it becomes smaller depending on the incoming electric field strength.

この現象は一般にFM受信機のノイズスケルチとして利
用されているものであるから詳細な説明は省略する。一
方着信電界信号中に含まれる変調信号Sのレベルは所定
レベル、例えば数dBにて一定となるがこれはバイパス
フィルタHPFによって阻止されるから整流出力として
現われない。
This phenomenon is generally used as a noise squelch in FM receivers, so a detailed explanation will be omitted. On the other hand, the level of the modulated signal S included in the incoming electric field signal is constant at a predetermined level, for example, several dB, but this is blocked by the bypass filter HPF and therefore does not appear as a rectified output.

斯くして受信機着信電圧に応じて減少する直流電圧が第
4の電圧比較回路17の基準電圧V4=0.5V以下に
なると該部出力が高電位となる。又、更に着信電界強度
が増大するとリミッタ電圧が上昇し他の3つの電圧比較
回路の基準電圧値を越えるとその電圧値に応じて3つの
電圧比較回路の基準電圧を越えたものの出力に高電位を
生ずる。
In this way, when the DC voltage, which decreases in accordance with the receiving voltage of the receiver, becomes equal to or less than the reference voltage V4 of the fourth voltage comparison circuit 17 of 0.5V, the output of the fourth voltage comparison circuit 17 becomes a high potential. Furthermore, when the incoming electric field strength increases, the limiter voltage increases and exceeds the reference voltage values of the other three voltage comparison circuits. will occur.

斯くして、受信機への着信電界強度に応じ順次アンドゲ
ート18乃至21のうちいづれか一つのみその出力に高
電位を発生し、これによって4つの低周波トーン信号の
うち一つが選択されて通信ケーブルに送出される。
In this way, only one of the AND gates 18 to 21 generates a high potential at its output depending on the strength of the electric field arriving at the receiver, and one of the four low frequency tone signals is thereby selected for communication. sent out to the cable.

通信ケーブル8を介して伝送されたトーン信号は集中制
御装置側の増幅器34を経て4つのトーンフィルタ35
乃至38のいづれか一つを通過し、整流器によって直流
化されて表示操作部のランプを点灯する。オペレータは
この表示を見て基地局の着信電界の大小を識別すること
ができる。
The tone signal transmitted via the communication cable 8 passes through an amplifier 34 on the central control device side and then passes through four tone filters 35.
The current passes through any one of 38 to 38, is converted into direct current by a rectifier, and lights up the lamp of the display/operation unit. The operator can identify the magnitude of the incoming electric field from the base station by looking at this display.

尚、@3図に於いては一つの基地局側制御器とこれに対
する集中制御器側のそれとの一対一の関係のみを示した
が2竿1図に示したシステムを機能せしめるには集中制
御装置に更に里4図に示す機能を付加する必要がある。
Note that Figure @3 only shows the one-to-one relationship between one base station side controller and its central controller side, but in order to make the system shown in Figure 2 function, centralized control is required. It is necessary to add the functions shown in Figure 4 to the device.

即ち、第4図は集中制御装置の一実施例を示すブロック
図であって、10−1乃至10−n及び11−1乃至1
1−n は夫々複数の基地局名々に備える第3図に示し
九基地側制御610とこれに対応する集中制御装置側に
設けた1制御器11である。
That is, FIG. 4 is a block diagram showing one embodiment of the central control device, and includes 10-1 to 10-n and 11-1 to 1.
1-n are nine base-side controls 610 shown in FIG. 3, which are provided for each of a plurality of base stations, and one controller 11 provided on the corresponding central control device side.

この実施例では集中制御装置に基地局選択可路輔を設け
、核部に於いて前記制御器11−1+3乃至11−n夫々の表示・操作部目から出力する2進化
符号を比較して4ビツト2進数で表わされる数値のうち
最大のものを選択表示する。
In this embodiment, a base station selectable route is provided in the central control device, and the binary code outputted from the display/operation section of each of the controllers 11-1+3 to 11-n is compared in the core section. Select and display the largest value among the numerical values expressed in bit binary numbers.

即ち、各基地局から伝送されたトーン信号によって各々
の表示・操作部から4ビット符号が出力されるから、こ
れをメモリに記憶するとともに各ビット値を比較する。
That is, since a 4-bit code is output from each display/operation unit in response to a tone signal transmitted from each base station, this is stored in the memory and the respective bit values are compared.

表示・操作部から出力されるビット信号は例えば、すべ
ての基地局のいづれにも着信電界が無い場合にはモニタ
受信機からの雑音レベル最大となりその雑音整流電圧は
約5V程度となるからいづれのアンドゲートも高電位を
生ぜず、従ってトーンの送出も行なわれない。
For example, if there is no incoming electric field at any of the base stations, the bit signal output from the display/operation unit will have the maximum noise level from the monitor receiver, and the rectified noise voltage will be approximately 5V, so The AND gate also does not produce a high potential and therefore no tone is sent.

次に図示せぬ移動局からの電波によって複数の基地局の
いくつかに夫々異なった電界強度の着信があると、各々
受信機復調信号中の雑音成分或はリミッタ電圧値に対応
した)−7信号が集中制御装置に伝送され、核部の制御
器11−1乃至11−nのうち対応するものに他と異な
った4ビット符号が出力されるから、この出力を比較す
ればいづれの基地にどの穆度の着信があったかを判定す
ることができる。
Next, when a radio wave from a mobile station (not shown) arrives at several base stations with different electric field strengths, each signal corresponds to the noise component or limiter voltage value in the receiver demodulated signal)-7 The signal is transmitted to the central control device, and a 4-bit code different from the others is output to the corresponding one of the core controllers 11-1 to 11-n, so by comparing the outputs, it can be determined which base It is possible to determine which level of incoming call was received.

従って集中制御装置のオペレータは、この判定の結果に
よって行なわれるランプ表示等を視認して集中制御装置
に設けた基地局選択スイッチ9を操作して着信電界最大
と判断された基地局のみを選択して起動させる。
Therefore, the operator of the central control device visually checks the lamp display etc. performed based on the result of this determination and operates the base station selection switch 9 provided in the central control device to select only the base station determined to have the maximum incoming electric field. and start it.

同、複数の基地局に同一レベルの着信があった場合には
そのうちいづれか一つを選択すればよい。
Similarly, if there are incoming calls at the same level at multiple base stations, it is only necessary to select one of them.

このように構成すれば複数の基地局のうち一局のみを介
して移動局と通信を行うことができるから、上述した従
来のシステムに於けるビート干渉やフェージングの諸問
題を解決することができる。
With this configuration, it is possible to communicate with the mobile station through only one of the multiple base stations, so it is possible to solve the problems of beat interference and fading in the conventional systems mentioned above. .

以上の実施例では本発明の最も基本的な構成及び運用形
態を示したが2本発明はこれに限らず種々の機能追加及
び変形が考えられろ。
Although the most basic configuration and operational form of the present invention have been shown in the above embodiments, the present invention is not limited thereto, and various functional additions and modifications may be made.

例えば、前記集中制御装置に於ける基地局選択操作をオ
ペレータに依らず自動的に行うよう構成することも可能
であろうし、又、いづれか一つの基地局にて通信中に、
該基地局と他の基地局の着信電界強度を常時或は間欠的
に比較して、移動局の場所移動によって変化する各基地
局への着信電界強度の変動を検出し、常に最大着信を有
する基地局を選択し直すようにしてもよいこと容易に理
解できよう。
For example, it would be possible to configure the central control device to automatically select a base station without depending on the operator, or, while communicating at any one base station,
Compare the incoming field strength of the base station and other base stations constantly or intermittently to detect variations in the incoming field strength to each base station that changes due to the movement of the mobile station, and always maintain the maximum incoming field strength. It will be easily understood that the base station may be selected again.

又、各基地局に於ける着信電界強度の識別手段としては
上述した雑音レベルとリミッタ電圧の併用に限らすいづ
れか一方のみによってもよく、或は受信機がAM等の場
合には、一般的にAGC回路(自動利得制御回路)を備
えるから、その制御電圧を用いてもよいこと自明であろ
う。
In addition, the means for identifying the incoming electric field strength at each base station may be limited to the combination of the above-mentioned noise level and limiter voltage, or only one of them may be used, or if the receiver is an AM receiver, etc., generally Since it includes an AGC circuit (automatic gain control circuit), it is obvious that its control voltage may be used.

更には、集中制御装置に於いて行う各基地局からの信号
処理にあたってはCPU (セントラルプロセッサユニ
ット)を用いてもよ(、CPUによれば基地局の数が多
くなっ九場合、或は着信レベル区分数が多くなった場合
に処理装置の構成が簡単となるメリットがある。
Furthermore, a CPU (Central Processing Unit) may be used to process the signals from each base station in the centralized control device. This has the advantage of simplifying the configuration of the processing device when the number of divisions increases.

第5図はCPUを用いて構成する集中制御装置側制御器
の一実施例を示すブロック図であって、構成を簡単にす
るためにトーン周波数f1乃至f4を弁別する1組のバ
ンドパスフィルタキジ柵を備え各基地局から通信ケーブルを介して4し伝送されて来るトーン信号を切替スイッチ科によって順
次切替えると共に夫々のフィルタ出力を整流層相によつ
で直流化したのちCPU利に入力する。
FIG. 5 is a block diagram showing an embodiment of the controller on the side of the central control device configured using a CPU. The system is equipped with a fence, and the tone signals transmitted from each base station via communication cables are sequentially switched by a changeover switch system, and the outputs of each filter are converted into DC by a rectifier layer phase, and then input to the CPU controller.

ドアするが、このとき所要タイミングにて前記アドレス
に順次ストアする。
At this time, the addresses are sequentially stored at the required timing.

更に−通りストアしたらこの記憶内容を順次2つづつ演
算装置(ALU)=t=tに呼び出し両者の大小を比較
していづれか一方を残し他方な前記メモIJ Iの他の
ものと入れ替え順次比較する。
Furthermore, after storing the memory contents two by two, call them to the arithmetic unit (ALU) = t = t and compare the size of both, leave one of them and replace the other with the other memo IJ I and compare in sequence. .

、5−/これら一連の操作はクロックジェネレータ例りLにより駆動されたコントローラ(ロ)によって制外御し、比較した結果は該コントローラ柵な介りして基地局選択スイッチHに送付し核部に於いて最大受
信電界を得九基地局をランプ点灯して表示するか或は表
示しかつ自動的に当該基地局を選局して回線を接続する
, 5-/ These series of operations are controlled by a controller (B) driven by a clock generator L, and the comparison results are sent to the base station selection switch H via the controller fence and sent to the core. The maximum received electric field is obtained and the nine base stations are displayed with their lamps lit or displayed, and the base station is automatically selected and the line is connected.

伺、所望の基地局を選択した後も自動的に常時又は間欠
的に或は必要に応じて手動によって当該基地局及び他の
基地局の着信電界強度を監視してもよいこと上述した通
りであるが、この場合同時に他基地局モニタ受信機の音
声を聞けるようにしておけば移動局の識別が可能となり
便利であろう。尚この場合前記トーン信号周波数を3K
Hz近傍又は200Hz近傍の如く音声帯域端部周波と
してモニタする際フィルタ等によりこれを除去すれば聞
くうえでの煩しさがなく都合がよい。
As mentioned above, even after selecting a desired base station, the incoming field strength of that base station and other base stations may be monitored automatically, constantly or intermittently, or manually as necessary. However, in this case, it would be convenient to be able to listen to the voices of other base station monitor receivers at the same time, as this would enable identification of the mobile station. In this case, the tone signal frequency is set to 3K.
When monitoring audio band end frequencies, such as frequencies near Hz or 200 Hz, it is convenient to eliminate them using a filter or the like, as it does not bother the listener.

又2本発明に供する装置は上述した実施例に限らず他の
構成としてもよく例えば前記単一トーン信号に代えてD
 T M F等のマルチトーンによる制御、又はFSX
、PSKによるデジタル信号等測でもよいし、更には基
地局と集中制御装置との接続は有線以外にもマイクロ波
回線等、或は他の中継手段を用い友ものどのようなもの
であってもよい。
Further, the device according to the present invention is not limited to the above-mentioned embodiment, and may have other configurations, for example, instead of the single tone signal, D
Multitone control such as TMF, or FSX
, PSK digital signal measurement may be used, and furthermore, the connection between the base station and the central control device may be any type of connection using microwave lines or other relay means other than wires. good.

更には集中制御装置は1つに限らず複数設けること或は
これらを互いに関係づけて話中表示等の機能?付加する
こと等は自由である。
Furthermore, should there be more than one centralized control device, or should they be related to each other and have functions such as busy display? You are free to add anything.

(発明の効果)本発明は以上説明した如く構成しかつ機能するものであ
るから、複数の基地局を遠隔制御する場合の相互干渉に
よるフェージング或はビート障害を除去し極めて安定し
かつ品質のよい通信を行い得る通信システムを構成する
うえで著効を奏する。
(Effects of the Invention) Since the present invention is configured and functions as described above, fading or beat disturbance caused by mutual interference when remotely controlling multiple base stations can be eliminated, resulting in extremely stable and high quality. It is effective in configuring a communication system that can perform communications.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例を示すブロック図、第2図f
alはFM受信機の87N特性図、同図(blはリミッ
タ電圧特性図、第3図は本発明に於いて用いる制御器の
一実施例を示すブロック図、第4図は本発明の他の一実
施例を示すブロック図、第5図は本発明に係かる装置の
変形実施例を示すブロック図、第6図(at及び(bl
は従来の複数基地局の制御方法及びその不具合を説明す
るための模式図である。1.2,3.6−1.6−2.・・・・・・6− n・
・・・・・・・・基地局4・・・・・・・・・通信統制
所。5・・・・・・・・・移動局、   7・・・・・・・
・・集中制御装置8 、8−1 、8−2 、・・・・
・・、8−n・・・・・・・・・通信ケーブル、   
9・・・・・・・・・基地局選択スイッチ、    1
0.10−1.10−2.・・・・・・、10−n・・
・・・・・・・基地局側制御器、   11・・・・・
・・・・集中制御装置側制御器、   12・・・・・
・・・・リミッタ電圧回路、    13・・・・・・
・・・雑音検出器。TRXI、TRX2.・・・・・・、TRXn・・・・
・・・・−送受信機。RXI、RX2.・・・・・・、 RX n・・・・・
・・・・モニタ受信機、    C0NT1.C0NT
z、・・・・・・、C0NTn・・・・・・・・・制御
器。特許出願人  東洋通信機株式会社男 1 口(a)              (b)第 2 ■
Fig. 1 is a block diagram showing one embodiment of the present invention, Fig. 2 f
al is an 87N characteristic diagram of the FM receiver, the same figure (bl is a limiter voltage characteristic diagram, FIG. 3 is a block diagram showing one embodiment of the controller used in the present invention, and FIG. 4 is a diagram showing other embodiments of the present invention). FIG. 5 is a block diagram showing a modified embodiment of the apparatus according to the present invention, and FIG. 6 (at and (bl)
FIG. 1 is a schematic diagram for explaining a conventional method of controlling multiple base stations and its problems. 1.2, 3.6-1.6-2.・・・・・・6-n・
・・・・・・Base station 4・・・・・・Communication control center. 5・・・・・・・Mobile station, 7・・・・・・・
... Central control device 8 , 8-1 , 8-2 , ...
..., 8-n... Communication cable,
9...Base station selection switch, 1
0.10-1.10-2. ......, 10-n...
...Base station side controller, 11...
... Centralized control device side controller, 12 ...
...Limiter voltage circuit, 13...
...Noise detector. TRXI, TRX2. ......, TRXn...
...-transmitter/receiver. RXI, RX2. ......, RX n...
...Monitor receiver, C0NT1. C0NT
z,..., C0NTn......Controller. Patent applicant: Toyo Tsushinki Co., Ltd. 1. (a) (b) 2. ■

Claims (1)

Translated fromJapanese
【特許請求の範囲】1、通信ゾーン内に複数の基地局を設け、これら基地局
を一つ或は複数の通信所から遠隔制御することによって
通信ゾーン内の移動通信局と通信を行うシステムに於い
て、前記複数の基地局夫々に於ける通信相手たる移動局
からの着信電界レベル又は通話品質を検出すると共に該
検出結果を前記通信所に伝達し、該通信所に於いて前記
基地局から伝送された夫々の検出結果を比較し、うち最
大電界レベル或は最良通話品質の基地局又は、一定電界
レベル或は一定通話品質以上の基地局のうちいづれか一
つを選択するとともに該基地局を介して通信を行うこと
を特徴とした複数基地局の制御方法。2、前記基地局に於ける着信電界レベル検出を該基地局
の受信機又は別途設けたモニタ用受信機のリミッタ電流
を検出することによって行うことを特徴とする特許請求
の範囲第1項記載の複数基地局の制御方法。3、前記基地局に於ける着信電界レベル検出を該基地局
の受信機又は別途設けたモニタ用受信機の復調出力中の
雑音レベルを検出することによって行うことを特徴とす
る特許請求の範囲第1項記載の複数基地局の制御方法。4、前記基地局に於ける着信電界レベル検出を該基地局
の受信機又は別途設けたモニタ用受信機の雑音レベル及
びリミッタ電流とを併用して行うことを特徴とする特許
請求の範囲第1項記載の複数基地局の制御方法。
[Claims] 1. A system that provides a plurality of base stations within a communication zone and remotely controls these base stations from one or more communication stations to communicate with mobile communication stations within the communication zone. In each of the plurality of base stations, an incoming electric field level or call quality from a mobile station as a communication partner is detected, and the detection result is transmitted to the communication station, and the detection result is transmitted from the base station at the communication station. The transmitted detection results are compared, and one of the base stations with the maximum electric field level or the best speech quality, or the base station with a certain electric field level or a certain speech quality or more is selected, and the base station is selected. A method for controlling multiple base stations characterized by communicating through a plurality of base stations. 2. The incoming electric field level at the base station is detected by detecting a limiter current of a receiver of the base station or a separately provided monitor receiver. Control method for multiple base stations. 3. The incoming electric field level at the base station is detected by detecting the noise level in the demodulated output of the base station's receiver or a separately provided monitor receiver. The method for controlling multiple base stations according to item 1. 4. The first aspect of the present invention is characterized in that the incoming electric field level at the base station is detected using a noise level and a limiter current of a receiver of the base station or a separately provided monitor receiver. Method for controlling multiple base stations as described in Section 1.
JP61170186A1986-07-181986-07-18Control method for plural base stationsPendingJPS6326129A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP61170186AJPS6326129A (en)1986-07-181986-07-18Control method for plural base stations

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP61170186AJPS6326129A (en)1986-07-181986-07-18Control method for plural base stations

Publications (1)

Publication NumberPublication Date
JPS6326129Atrue JPS6326129A (en)1988-02-03

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JP61170186APendingJPS6326129A (en)1986-07-181986-07-18Control method for plural base stations

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH01291532A (en)*1988-05-181989-11-24Oki Electric Ind Co LtdRadio data communication system
JPH04337997A (en)*1991-02-281992-11-25American Teleph & Telegr Co <Att>Radio telecommunication system
US6226505B1 (en)1996-11-202001-05-01Nec CorporationAutomatic frequency correction apparatus and method for radio calling system
KR100342633B1 (en)*1998-10-262002-07-04가네꼬 히사시Mobile communication system capable of reducing a traffic between a control station and base stations
WO2005069664A1 (en)*2004-01-162005-07-28Ktfreetel Co., Ltd.Device and method for remotely measuring and monitoring antenna system using mobile terminal

Citations (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS5649024A (en)*1979-07-261981-05-02Hedlund K O FCarding * ceaning opening apparatus of fiber lump
JPS5869142A (en)*1981-10-201983-04-25Nec CorpSelecting system for radio base station
JPS6019255B2 (en)*1981-08-311985-05-15大日本インキ化学工業株式会社 fire extinguishing foam

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS5649024A (en)*1979-07-261981-05-02Hedlund K O FCarding * ceaning opening apparatus of fiber lump
JPS6019255B2 (en)*1981-08-311985-05-15大日本インキ化学工業株式会社 fire extinguishing foam
JPS5869142A (en)*1981-10-201983-04-25Nec CorpSelecting system for radio base station

Cited By (7)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH01291532A (en)*1988-05-181989-11-24Oki Electric Ind Co LtdRadio data communication system
JPH04337997A (en)*1991-02-281992-11-25American Teleph & Telegr Co <Att>Radio telecommunication system
US5513184A (en)*1991-02-281996-04-30At&T Corp.Wireless communication system
US6226505B1 (en)1996-11-202001-05-01Nec CorporationAutomatic frequency correction apparatus and method for radio calling system
KR100342633B1 (en)*1998-10-262002-07-04가네꼬 히사시Mobile communication system capable of reducing a traffic between a control station and base stations
WO2005069664A1 (en)*2004-01-162005-07-28Ktfreetel Co., Ltd.Device and method for remotely measuring and monitoring antenna system using mobile terminal
US7917175B2 (en)2004-01-162011-03-29Kt CorporationDevice and method for remotely measuring and monitoring antenna system using mobile terminal

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