JP2833163B2 - Radio wave condition monitoring system - Google Patents
Radio wave condition monitoring systemInfo
- Publication number
- JP2833163B2 JP2833163B2 JP2167026A JP16702690A JP2833163B2 JP 2833163 B2 JP2833163 B2 JP 2833163B2 JP 2167026 A JP2167026 A JP 2167026A JP 16702690 A JP16702690 A JP 16702690A JP 2833163 B2 JP2833163 B2 JP 2833163B2
- Authority
- JP
- Japan
- Prior art keywords
- communication channel
- radio wave
- control
- receiver
- station
- 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.)
- Expired - Fee Related
Links
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Mobile Radio Communication Systems (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は自動車電話における電波状態監視システムに
関し、特に制御局が各基地局に移動局の送信電波を受信
させてその電波状態を監視し、受信状態に応じて移動局
に対し通話チャネルを指定する電波状態監視システムに
関する。Description: TECHNICAL FIELD The present invention relates to a radio wave condition monitoring system in a car telephone, and in particular, a control station controls each base station to receive a radio wave transmitted from a mobile station and monitors the radio wave condition. The present invention relates to a radio wave condition monitoring system for designating a communication channel to a mobile station according to a reception state.
自動車電話のサービスエリアは複数の無線ゾーンに分
割されており、各無線ゾーンには基地局が設置され、移
動局と基地局とは発呼および着呼処理等を行うための制
御チャネル並びに通話のための通話チャネルで結ばれて
いる。また、基地局と制御局とは制御および通話アプロ
ーチラインを介して接続されており、更に制御局は既設
電話交換網と接続されている。制御局は、移動局が隣接
する一方の無線ゾーンから他方の無線ゾーンへ移動した
場合に通話チャネルの切替えを支持するために、各基地
局に移動局の通話チャネルを受信させてその受信電界強
度を検知させ、検知結果を受けて各移動局の電波状態を
監視している。従来は、各基地局に通話チャネル受信機
の他に監視用受信機を設置したり、あるいは未使用の通
話チャネル受信機を使用したりして移動局からの電波状
態を監視している。The service area of a mobile phone is divided into a plurality of radio zones, and a base station is installed in each radio zone. The mobile station and the base station communicate with each other through a control channel for performing outgoing and incoming call processing and a call. For being tied in a call channel. The base station and the control station are connected via a control and communication approach line, and the control station is connected to an existing telephone switching network. The control station causes each base station to receive the mobile station's communication channel to support switching of the communication channel when the mobile station moves from one adjacent wireless zone to the other wireless zone, and receives the received electric field strength. , And receives the detection result to monitor the radio wave condition of each mobile station. Conventionally, a monitoring receiver is installed in each base station in addition to a communication channel receiver, or the state of a radio wave from a mobile station is monitored by using an unused communication channel receiver.
上述したように、各基地局に通話チャネル受信機の他
に監視用受信機を設置する場合は、システムの設備費が
高額になるという問題がある。また、未使用の通話チャ
ネル受信機を使用する場合は、監視用受信機を設置しな
いので設備費を抑えることはできるが、監視を行うため
に通話チャネルが専有されるので、空き通話チャネルが
ないときは監視を行うことができない。このため重要加
入者に通話チャネルを優先して割当てるシステムにおい
て問題となる。もし、空き通話チャネルがないときには
監視を行う場合には通話を切断してチャネルを確保しな
ければならずサービスが低下するという問題が生じる。As described above, when a monitoring receiver is installed in each base station in addition to the communication channel receiver, there is a problem that the equipment cost of the system is high. In addition, when an unused communication channel receiver is used, equipment cost can be reduced because no monitoring receiver is installed, but since the communication channel is exclusively used for monitoring, there is no empty communication channel. Sometimes monitoring is not possible. This poses a problem in a system that preferentially allocates communication channels to important subscribers. If there is no available communication channel, when monitoring is to be performed, the communication must be disconnected to secure a channel, which causes a problem that the service is reduced.
本発明の目的は、監視用受信機を設置することなく、
また、空き通話チャネルがないときに通話断が頻発する
ことなく、移動局からの電波の受信状態を監視すること
のできる電波状態監視システムを提供することにある。An object of the present invention is to provide a monitoring receiver without installing it.
Another object of the present invention is to provide a radio wave condition monitoring system capable of monitoring a radio wave reception condition from a mobile station without frequent call disconnection when there is no available call channel.
本発明の電波状態監視システムは、制御局が制御チャ
ネル受信機および通話チャネル受信機をそれぞれ備えた
複数の基地局に移動局の送信電波を受信させてその電波
状態を監視する電波状態監視システムにおいて、前記制
御チャネル受信機および前記通話チャネル受信機は、制
御信号によって指定される通話チャネルを受信する手段
と、受信した通話チャネルの受信電界強度を検知する手
段とをそれぞれ備えて構成される。また、前記制御局
が、前記基地局に空き通話チャネルがあるときは未使用
の前記通話チャネル受信機により前記送信電波の受信状
態を監視させ、また、空き通話チャネルがないときは前
記制御チャネル受信機により前記送信電波の受信状態を
監視させるように前記制御信号を生成して前記基地局へ
送出するように構成してもよく、あるいは、前記基地局
が、空き通話チャネルがあるときは未使用の前記通話チ
ャネル受信機により前記送信電波の受信状態を監視し、
また、空き通話チャネルがないときは前記制御チャネル
受信機により前記送信電波の受信状態を監視するように
前記制御信号を生成するように構成してもよい。更に、
前記通話チャネルを受信する手段は、前記制御信号によ
って指定される通話チャネルに応じて所定の局部発振信
号を生成する周波数シンセサイザを有して構成してもよ
い。A radio wave condition monitoring system according to the present invention is a radio wave condition monitoring system in which a control station causes a plurality of base stations each having a control channel receiver and a communication channel receiver to receive a transmission wave of a mobile station and monitor the radio wave condition. The control channel receiver and the communication channel receiver each include a unit for receiving a communication channel specified by a control signal, and a unit for detecting a received electric field strength of the received communication channel. Further, the control station causes the unused communication channel receiver to monitor the reception state of the transmission radio wave when the base station has an empty communication channel, and controls the control channel reception when there is no empty communication channel. The control signal may be generated and sent to the base station so as to monitor the reception state of the transmission radio wave by a device, or the base station may not be used when there is an idle communication channel. Monitoring the reception state of the transmission radio wave by the communication channel receiver of,
The control signal may be generated such that the control channel receiver monitors the reception state of the transmission radio wave when there is no available communication channel. Furthermore,
The means for receiving the communication channel may include a frequency synthesizer for generating a predetermined local oscillation signal according to the communication channel specified by the control signal.
次に図面を参照して本発明を説明する。 Next, the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示すブロック図であり、
複数の基地局の内の一局分についてのみ示し他は省略し
ている。また、各基地局は１つの制御チャネルと２つの
通話チャネルが割当てられている場合を示している。制
御局１と基地局２とは制御アプローチライン４および通
話アプローチライン5,6により接続されており、また移
動局３と基地局２とは無線で結ばれる。基地局２は、発
呼および着呼処理等を行うための制御チャネル送信機1
1、同じく制御チャネル受信機12、通話のための通話チ
ャネル送信機21,31、同じく通話チャネル受信機22,32、
指定されたチャネルを受信するための局部発振信号を生
成する周波数シンセサイザ13,23,33、受信電界強度を検
知して電界強度を示す信号を出力する電界強度検知部1
4,24,34、局部発振信号に応じて指定されたチャネルを
受信する制御チャネル受信部15および通話チャネル受信
部25,35、制御アプローチライン４に接続されて制御信
号の処理等を行う制御部41、送受信アンテナ52を共用す
るためのアンテナ共用部51を備えている。FIG. 1 is a block diagram showing one embodiment of the present invention.
Only one of the plurality of base stations is shown and the others are omitted. In addition, each base station shows a case where one control channel and two traffic channels are allocated. The control station 1 and the base station 2 are connected by a control approach line 4 and communication approach lines 5 and 6, and the mobile station 3 and the base station 2 are wirelessly connected. The base station 2 includes a control channel transmitter 1 for performing outgoing and incoming call processing and the like.
1, also control channel receiver 12, communication channel transmitters 21 and 31, for communication, also communication channel receivers 22, 32,
Frequency synthesizers 13, 23, and 33 that generate local oscillation signals for receiving a specified channel, and an electric field intensity detector 1 that detects a received electric field intensity and outputs a signal indicating the electric field intensity
4, 24, 34, a control channel receiving unit 15 and a communication channel receiving unit 25, 35 for receiving a channel designated according to a local oscillation signal, and a control unit connected to the control approach line 4 for processing a control signal and the like. 41, an antenna sharing unit 51 for sharing the transmission / reception antenna 52 is provided.
次に、動作について説明する。 Next, the operation will be described.
制御局１は、移動局３が通話している無線ゾーンおよ
びその周辺の無線ゾーンでの電界強度を監視し、電界強
度最大の無線ゾーンに移動局が所在しているものと判断
し、電界強度の変化に応じて通話チャネルの切替えを指
示する。The control station 1 monitors the electric field strength in the wireless zone in which the mobile station 3 is talking and in the surrounding wireless zones, determines that the mobile station is located in the wireless zone having the highest electric field strength, and determines the electric field strength. Instructs to switch the communication channel in accordance with the change of the communication channel.
基地局２が、別の無線ゾーンで通話中の移動局３の受
信電波状態を監視する場合、いま、基地局２に空き通話
チャネルがあり、例えば通話チャネル受信機32が未使用
であるとすると、制御局１は、制御アプローチライン４
を介して基地局２に制御信号を送出して周波数シンセサ
イザ33に対し移動局３が使用中の通話チャネルを受信す
るための局部発振信号を生成するように指定する。通話
チャネル受信部35は、周波数シンセサイザ33からの局部
発振信号を受けて指定された通話チャネルを受信する。
電界強度検知部34は、受信電界強度を検知して電界強度
を示す信号を制御部41へ送出する。制御部41は、電界強
度を示す信号を制御アプローチライン４を介して制御局
１へ送出する。When the base station 2 monitors the reception radio wave state of the mobile station 3 that is talking in another wireless zone, it is assumed that the base station 2 has an idle communication channel and the communication channel receiver 32 is unused, for example. , The control station 1 controls the control approach line 4
And sends a control signal to the base station 2 via the base station 2 to instruct the frequency synthesizer 33 to generate a local oscillation signal for receiving the communication channel used by the mobile station 3. The communication channel receiving unit 35 receives the local oscillation signal from the frequency synthesizer 33 and receives the specified communication channel.
The electric field strength detection unit 34 detects the received electric field strength and sends a signal indicating the electric field strength to the control unit 41. The control unit 41 sends a signal indicating the electric field strength to the control station 1 via the control approach line 4.
基地局２に空き通話チャネルがない場合は、制御局１
は、制御アプローチライン４を介して制御チャネル受信
機12の周波数シンセサイザ13に対して移動局３が使用中
の通話チャネルを受信するための局部発振信号を指定す
る。制御チャネル受信部15は、周波数シンセサイザ13か
らの局部発振信号を受けて移動局３が送信する通話チャ
ネルを受信する。電界強度検知部14は、制御チャネル受
信部15から信号を受けて受信電界強度を検知し電界強度
を示す信号を制御部41へ送出する。制御部41は、電界高
度を示す信号を制御アプローチライン４を介して制御局
１へ送出する。制御局１は電界強度を示す信号を受けて
移動局３の電波状態を監視し、移動局３の移動先を判定
し、電波状態に応じて移動先の無線ゾーンの通話チャネ
ルへの切替えを指示する。If the base station 2 has no available communication channel, the control station 1
Specifies a local oscillation signal for receiving the communication channel used by the mobile station 3 to the frequency synthesizer 13 of the control channel receiver 12 via the control approach line 4. The control channel receiving unit 15 receives a local oscillation signal from the frequency synthesizer 13 and receives a communication channel transmitted by the mobile station 3. The electric field strength detection unit 14 receives a signal from the control channel reception unit 15, detects the received electric field strength, and sends a signal indicating the electric field strength to the control unit 41. The control unit 41 sends a signal indicating the electric field height to the control station 1 via the control approach line 4. The control station 1 receives the signal indicating the electric field strength, monitors the radio wave condition of the mobile station 3, determines the destination of the mobile station 3, and instructs the switching to the communication channel of the destination radio zone according to the radio wave condition. I do.
上述した実施例では、電波状態監視のための制御信号
を制御局１で生成して基地局２へ送出しているが、基地
局２の制御部41で生成しても同様に実施できる。この場
合の動作は次の通りである。まず、制御局１は監視すべ
き通話チャネルを制御アプローチライン４を介して基地
局２へ通知する。基地局２の制御部41は空き通話チャネ
ルがあるかどうかを判定し、空き通話チャネルがあると
きは、その通話チャネル受信機に制御信号を送出して監
視すべき通話チャネルの受信電界状態を検知させる。ま
た、空き通話チャネルがないときは、制御チャネル受信
機に対して制御信号を送出して監視すべき通話チャネル
の受信電界状態を検知させる。制御部41は電界強度を示
す信号を制御アプローチライン４を介して制御局１へ送
出する。In the above-described embodiment, the control signal for monitoring the radio wave condition is generated by the control station 1 and transmitted to the base station 2. However, the control unit 41 of the base station 2 can similarly generate the control signal. The operation in this case is as follows. First, the control station 1 notifies the base station 2 of the communication channel to be monitored via the control approach line 4. The control unit 41 of the base station 2 determines whether there is a free communication channel, and if there is a free communication channel, sends a control signal to the communication channel receiver to detect the reception electric field state of the communication channel to be monitored. Let it. If there is no free communication channel, a control signal is sent to the control channel receiver to detect the reception electric field state of the communication channel to be monitored. The control unit 41 sends a signal indicating the electric field strength to the control station 1 via the control approach line 4.
以上説明したように本発明によれば、制御信号により
指定される通話チャネルを受信する手段と、受信した通
話チャネルの受信電界強度を検知する手段とを各基地局
の制御チャネル受信機および通話チャネル受信機にそれ
ぞれ設け、基地局に空き通話チャネルがあるときは未使
用の通話チャネル受信機に移動局の送信電波の受信電界
強度を検知させ、空き通話チャネルがないときは制御チ
ャネル受信機に移動局の送信電波の受信電界強度を検知
させることによって、各基地局に監視用受信機を別に設
置する必要はなく、また、空き通話チャネルがないとき
でも通話チャネル受信機を専有することなく受信電波状
態の監視を行うことができるので、設備費を抑えると共
に、通話断を必要最小限に少なくしてサービス向上をは
かることができる電波状態監視システムとなる。As described above, according to the present invention, a means for receiving a communication channel specified by a control signal, and a means for detecting a received electric field strength of the received communication channel are provided by a control channel receiver and a communication channel of each base station. Provided in each receiver, if the base station has an idle communication channel, let the unused communication channel receiver detect the received electric field strength of the radio wave transmitted from the mobile station, and if there is no empty communication channel, move to the control channel receiver By detecting the received electric field strength of the transmitted radio wave of the station, there is no need to separately install a monitoring receiver at each base station, and the received radio wave can be obtained without occupying the communication channel receiver even when there is no available communication channel. Since the status can be monitored, equipment costs can be reduced and service interruptions can be minimized to improve service. A state monitoring system.
第１図は本発明の一実施例を示すブロック図である。 １……制御局、２……基地局、３……移動局、４……制
御アプローチライン、5,6……通話アプローチライン、1
1……制御チャネル送信機、12……制御チャネル受信
機、13,23,33……周波数シンセサイザ、14,24,34……電
界強度検知部、15……制御チャネル受信部、25,35……
通話チャネル受信部、21,31……通話チャネル送信機、2
2,32……通話チャネル受信機、41……制御部、51……ア
ンテナ共用部、52……送受信アンテナ。FIG. 1 is a block diagram showing one embodiment of the present invention. 1 ... Control station, 2 ... Base station, 3 ... Mobile station, 4 ... Control approach line, 5,6 ... Talk approach line, 1
1 ... Control channel transmitter, 12 ... Control channel receiver, 13,23,33 ... Frequency synthesizer, 14,24,34 ... Field strength detector, 15 ... Control channel receiver, 25,35 ... …
Communication channel receiving section, 21, 31, .... Communication channel transmitter, 2
2, 32: communication channel receiver, 41: control unit, 51: antenna common unit, 52: transmission / reception antenna.
Claims (4)
ャネル受信機をそれぞれ備えた複数の基地局に移動局の
送信電波を受信させてその電波状態を監視する電波状態
監視システムにおいて、前記制御チャネル受信機および
前記通話チャネル受信機は、制御信号によって指定され
る通話チャネルを受信する手段と、受信した通話チャネ
ルの受信電界強度を検知する手段とをそれぞれ備えるこ
とを特徴とする電波状態監視システム。1. A radio wave condition monitoring system in which a control station causes a plurality of base stations each provided with a control channel receiver and a communication channel receiver to receive a radio wave transmitted from a mobile station and monitor a radio wave state of the mobile station. A radio wave condition monitoring system, wherein the receiver and the communication channel receiver each include means for receiving a communication channel specified by a control signal, and means for detecting a received electric field strength of the received communication channel.
ネルがあるときは未使用の前記通話チャネル受信機によ
り前記送信電波の受信状態を監視させ、また、空き通話
チャネルがないときは前記制御チャネル受信機により前
記送信電波の受信状態を監視させるように前記制御信号
を前記基地局へ送出することを特徴とする請求項１記載
の電波状態監視システム。2. The control station, when the base station has an idle communication channel, causes the unused communication channel receiver to monitor the reception state of the transmission radio wave. The radio wave condition monitoring system according to claim 1, wherein the control signal is transmitted to the base station so that a control channel receiver monitors a reception state of the transmission radio wave.
きは未使用の前記通話チャネル受信機により前記送信電
波の受信状態を監視し、また、空き通話チャネルがない
ときは前記制御チャネル受信機により前記送信電波の受
信状態を監視するように前記制御信号を生成することを
特徴とする請求項１記載の電波状態監視システム。3. The base station monitors the reception state of the transmission radio wave by using an unused communication channel receiver when there is an available communication channel, and the control channel receiver when there is no available communication channel. The radio wave condition monitoring system according to claim 1, wherein the control signal is generated so as to monitor a reception state of the transmission radio wave.
制御信号によって指定される通話チャネルに応じて所定
の局部発振信号を生成する周波数シンセサイザを有して
構成されることを特徴とする請求項1,2または３記載の
電波状態監視システム。4. The apparatus according to claim 1, wherein said means for receiving the communication channel includes a frequency synthesizer for generating a predetermined local oscillation signal in accordance with the communication channel specified by the control signal. The radio wave condition monitoring system according to 1, 2, or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2167026A JP2833163B2 (en) | 1990-06-26 | 1990-06-26 | Radio wave condition monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2167026A JP2833163B2 (en) | 1990-06-26 | 1990-06-26 | Radio wave condition monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0456535A JPH0456535A (en) | 1992-02-24 |
| JP2833163B2 true JP2833163B2 (en) | 1998-12-09 |
Family
ID=15842015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2167026A Expired - Fee Related JP2833163B2 (en) | 1990-06-26 | 1990-06-26 | Radio wave condition monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2833163B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4906706B2 (en) * | 2007-12-26 | 2012-03-28 | 株式会社ニフコ | Safety device and opening / closing mechanism |
-
1990
- 1990-06-26 JP JP2167026A patent/JP2833163B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0456535A (en) | 1992-02-24 |
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