JPH03182129A - Mobile radio telephony system - Google Patents
Mobile radio telephony systemInfo
- Publication number
- JPH03182129A JPH03182129A JP1320662A JP32066289A JPH03182129A JP H03182129 A JPH03182129 A JP H03182129A JP 1320662 A JP1320662 A JP 1320662A JP 32066289 A JP32066289 A JP 32066289A JP H03182129 A JPH03182129 A JP H03182129A
- Authority
- JP
- Japan
- Prior art keywords
- alarm
- mobile station
- base station
- electric field
- alarm signal
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 230000005684 electric field Effects 0.000 claims description 48
- 230000007423 decrease Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔概要〕
携帯無線電話機等を用いる移動無線電話システムに関し
、
通話断となる状態となった時に、アラーム信号で通知す
ることを目的とし、
基地局と移動局とからなる移動無線電話システムに於い
て、前記基地局は、送受信部と弱電界検出部とアラーム
発生部とアラーム検出部とを備え、前記移動局は、送受
信部と弱電界検出部とアラーム発生部と電圧検出部とを
備え、前記基地局は、前記弱電界検出部により受信電波
の電界低下を検出した時に、前記アラーム発生部からの
アラーム信号を前記移動局と通話相手とに送出した後、
終話処理を行い、前記アラーム検出部により前記移結局
からのアラーム信号を検出した時に、通話相手にアラー
ム信号を送出し、前記移動局は、前記弱電界検出部によ
る受信電波の電界低下を検出した時、及び前記電圧検出
部によりｔ源電圧の低下を検出した時に、前記アラーム
発生部からのアラーム信号を前記基地局に送出するよう
に構成した。[Detailed Description of the Invention] [Summary] This invention relates to a mobile radio telephone system using a portable radio telephone, etc., and is composed of a base station and a mobile station, and is intended to notify with an alarm signal when a call is cut off. In the mobile radio telephone system, the base station includes a transmitting/receiving section, a weak electric field detecting section, an alarm generating section, and an alarm detecting section, and the mobile station includes a transmitting/receiving section, a weak electric field detecting section, an alarm generating section, and a voltage a detection section, and when the base station detects a decrease in the electric field of the received radio wave by the weak electric field detection section, the base station sends an alarm signal from the alarm generation section to the mobile station and the other party, and then
When a call termination process is performed and the alarm detection section detects an alarm signal from the transfer end, an alarm signal is sent to the other party, and the mobile station detects a decrease in the electric field of the received radio wave by the weak electric field detection section. and when the voltage detection section detects a drop in the t-source voltage, the alarm generation section sends an alarm signal to the base station.
〔産業上の利用分野］
本発明は、携帯無線電話機等を用いる移動無線電話シス
テムに関するものである。[Industrial Field of Application] The present invention relates to a mobile radio telephone system using a portable radio telephone or the like.
移動無線電話システムは、基地局のサービスエリア内に
存在する携帯無線電話機や自動車電話機等の移動局と、
基地局から回線制御局を介して固定電話網に収容された
一般加入者との間で通話を行うことができるシステムで
あり、−Ｎのサービス向上が要望されている。A mobile radio telephone system consists of mobile stations such as mobile radio telephones and car telephones that exist within the service area of a base station,
This is a system that allows calls to be made from a base station to a general subscriber accommodated in a fixed telephone network via a line control station, and there is a desire to improve the -N service.
〔従来の技術〕
移動無線電話システムは、例えば、第４図に示すように
、それぞれのサービスエリアが隣接するように複数の基
地局６１−１〜６１−５が配置され、回線制御局６３と
接続されている。この回線制御局６３は、一般加入者６
５が収容された固定電話＠６４と接続されている。[Prior Art] In a mobile radio telephone system, for example, as shown in FIG. It is connected. This line control station 63 is connected to the general subscriber 6
It is connected to a landline telephone @64 where 5 is accommodated.
回線制御局６３は、携帯無線電話機等の移動局６２の存
在位置を、この移動局６２からの受信電波強度が最大と
なる基地局により識別し、一般加入者６５との間の回線
を設定するものであり、図示の場合は、基地局６１−３
と固定電話網６４を介して一般加入者６５とが接続され
、移動局６２との間の通話が行われる。この移動局６２
が他の基地局、例えば、６１−５のサービスエリア内に
移動すると、基地局６１−３に於ける受信電波強度が低
下し、基地局６１−５に於ける受信電波強度が上昇する
。それによって、回線制御局６３は基地局６１−３から
基地局６１−５に回線を切替接続する。従って、一般加
入者６５と移動局６２とは、通話を継続することができ
る。The line control station 63 identifies the location of a mobile station 62 such as a portable radio telephone by the base station where the received radio wave strength from this mobile station 62 is maximum, and sets up a line with the general subscriber 65. In the case shown in the figure, the base station 61-3
A general subscriber 65 is connected to the mobile station 62 via a fixed telephone network 64, and a call is made between the mobile station 62 and the mobile station 62. This mobile station 62
moves into the service area of another base station, for example 61-5, the received radio field strength at base station 61-3 decreases and the received radio field strength at base station 61-5 increases. Thereby, the line control station 63 switches and connects the line from the base station 61-3 to the base station 61-5. Therefore, general subscriber 65 and mobile station 62 can continue talking.
又移動局６２からの受信電波強度が所定時間継続して低
下すると、移動局６２が終話操作を行うことなく通話可
能エリア外に移動したと見做して、基地局から移動局６
２に対して終話信号を送出し、強制的に回線切断を行う
ものである。In addition, if the received radio wave strength from the mobile station 62 continues to decrease for a predetermined period of time, the base station assumes that the mobile station 62 has moved out of the callable area without performing a call termination operation, and
2, and forcibly disconnects the line.
移動局６２は、基地局との間の無線通話に於ける現在位
置の電界強度を、通話音声レベルの低下により成る程度
認識できるが、フェージングが大きい場合も通話音声レ
ベルが低下するから、電界強度が低下するサービスエリ
ア外に移動しようとしているか否かを判断することは困
難である。The mobile station 62 can recognize the electric field strength at its current location during a wireless call with the base station to the extent that it is caused by a decrease in the voice level of the call, but if fading is large, the voice level of the call also decreases. It is difficult to determine whether you are moving out of the service area where the service area is degraded.
又基地局に於ける受信電波強度の低下を検出すると、移
動局に対して終話信号を送出して、回線切断を行うもの
であるから、一般加入者６５と移動局６２との間の通話
は突然に断となる。Furthermore, when the base station detects a decrease in the received radio field strength, it sends a call termination signal to the mobile station and disconnects the line, so that the communication between the general subscriber 65 and the mobile station 62 is terminated. is suddenly cut off.
又移動局６２は、自動車電話機のように、車載バッテリ
を電源とした場合、電源電圧の低下の問題は殆ど生じな
いが、携帯無線電話機の場合は、小型軽量化を図る為に
、電源として小型の電池を使用することになり、従って
、使用時間数に対応して１！源が消耗し、通話中に電源
電圧が低下する場合がある。このような状態となると、
送信電力が低下し、基地局に於ける受信電波強度が低下
するから、前述の場合と同様に、終話信号を移動局に送
出した後、回線切断を行うことになる。従って、一般加
入者６５と移動局６２との間の通話は突然に断となる。In addition, when the mobile station 62 is powered by an on-board battery like a car phone, there is almost no problem of a drop in power supply voltage, but in the case of a mobile radio phone, in order to reduce the size and weight, the power source is small and lightweight. Therefore, 1! corresponding to the number of hours of use. The power supply may become exhausted and the power supply voltage may drop during a call. In such a situation,
Since the transmission power decreases and the received radio wave strength at the base station decreases, the line is disconnected after transmitting the call termination signal to the mobile station, as in the case described above. Therefore, the call between the general subscriber 65 and the mobile station 62 is suddenly interrupted.
前述のように、通話中の一般加入者６５と移動局６２と
の終話の意思とは関係なく、突然に通話断の状態となる
から、電話機や回線の故障等の通話断の原因が不明であ
り、移動無線電話のサービスに問題があった。As mentioned above, the call is suddenly disconnected regardless of the intention of ending the call between the general subscriber 65 and the mobile station 62 during the call, so it is unclear whether the call was disconnected due to malfunction of the telephone or line, etc. There were problems with mobile radio telephone service.
本発明は、通話断となる状態となった時に、アラーム信
号で通知することを目的とするものである。An object of the present invention is to notify by an alarm signal when a call is cut off.
本発明の移動無線電話システムは、移動局の電源電圧の
低下及び受信電波強度の低下の場合に、アラーム信号に
より警告するものであり、第１図を参照して説明する。The mobile radio telephone system of the present invention provides a warning by means of an alarm signal in the event of a drop in the power supply voltage of a mobile station or a drop in received radio field strength, and will be described with reference to FIG.
回線制御局を介して固定電話網と接続された基地局１は
、送受信部３と弱電界検出部４とアラーム発生部５とア
ラーム検出部６とを備え、又移動局２は、送受信部７と
弱電界検出部８とアラーム発生部９と電圧検出部１０と
を備えている。なお１１はハンドセットを示す。The base station 1 connected to the fixed telephone network via a line control station includes a transmitting/receiving section 3, a weak electric field detecting section 4, an alarm generating section 5, and an alarm detecting section 6, and the mobile station 2 includes a transmitting/receiving section 7. , a weak electric field detection section 8 , an alarm generation section 9 , and a voltage detection section 10 . Note that 11 indicates a handset.
基地局ｌは、弱電界検出部４により移動局２からの受信
電波の電界低下を検出した時に、アラーム発生部５を起
動してアラーム信号を発生させ、このアラーム信号を移
動局２と通話相手とに送出した後、終話処理を行い、又
アラーム検出部５により移動局２からのアラーム信号を
受信検出した時に、通話相手にアラーム信号を送出する
。When the weak electric field detection unit 4 detects a decrease in the electric field of the received radio waves from the mobile station 2, the base station 1 activates the alarm generation unit 5 to generate an alarm signal, and transmits this alarm signal to the mobile station 2 and the other party. After sending the message to the mobile station 2, a call termination process is performed, and when the alarm detection section 5 receives and detects an alarm signal from the mobile station 2, an alarm signal is sent to the other party.
又移動局２は、弱電界検出部８により基地局１からの受
信電波の電界低下を検出した時、及び電圧検出部１０に
より電源電圧の低下を検出した時に、アラーム発生部９
を起動してアラーム信号を発生させ、このアラーム信号
を基地局ｌへ送出するものである。Furthermore, when the mobile station 2 detects a decrease in the electric field of the received radio waves from the base station 1 by the weak electric field detection section 8 and when the voltage detection section 10 detects a decrease in the power supply voltage, the mobile station 2 activates the alarm generation section 9.
is activated to generate an alarm signal, and this alarm signal is sent to base station l.
〔作用］
基地局ｌは、移動局２がサービスエリア外に移動しよう
した時や、移動局２の電源電圧の低下により、移動局２
からの電波強度が低下するから、これを弱電界検出部４
により検出する。そして、アラーム発生部５を起動して
アラーム信号を発生させ、そのアラーム信号を移動局ｌ
とその通話相手とに送出し、通話断となる前に警告を与
えるものである。従って、その後に通話断となっても、
サービスエリア外への移動等による電界低下による通話
断であることを通話中の加入者が判ることになる。[Operation] When the mobile station 2 attempts to move out of the service area or due to a drop in the power supply voltage of the mobile station 2, the base station 1
Since the strength of the radio waves from the weak electric field detector 4 decreases,
Detected by. Then, the alarm generator 5 is activated to generate an alarm signal, and the alarm signal is sent to the mobile station.
and the other party on the call to give a warning before the call is disconnected. Therefore, even if the call is subsequently disconnected,
The subscriber in the middle of a call will know that the call has been interrupted due to a drop in the electric field due to movement outside the service area or the like.
又移動局２は、受信電波の電界低下の場合、及び電源電
圧の低下の場合に、アラーム発生部９を起動してアラー
ム信号を発生させ、そのアラーム信号を基地局１に送出
する。この場合、基地局１に於いては電界低下とならな
い時でも、移動局２に於ける受信電波の電界低下や電源
電圧低下によるアラーム信号を、通話相手に送信して、
通話断となる予告を行うことができる。Furthermore, the mobile station 2 activates the alarm generator 9 to generate an alarm signal in the case of a decrease in the electric field of the received radio wave or in the case of a decrease in the power supply voltage, and sends the alarm signal to the base station 1. In this case, even when there is no electric field drop at the base station 1, an alarm signal due to a drop in the electric field of received radio waves or a drop in power supply voltage at the mobile station 2 is sent to the other party,
It is possible to give advance notice that the call will be cut off.
以下図面を参照して本発明の実施例について詳細に説明
する。Embodiments of the present invention will be described in detail below with reference to the drawings.
第２図は本発明の実施例の基地局の要部ブロック図、第
３図は本発明の実施例の移動局の要部ブロック図であり
、第２図に於いて、２１はアンテナ、２２は共用器、２
３は受信回路、２４は送信回路、２５は制御回路、２６
は弱電界検出回路、２７．３０はアラーム発生回路、２
８は終話信号発生回路、２９はアラーム検出回路、３１
は復調回路、３２は変調回路である。FIG. 2 is a block diagram of essential parts of a base station according to an embodiment of the present invention, and FIG. 3 is a block diagram of essential parts of a mobile station according to an embodiment of the present invention. In FIG. 2, 21 is an antenna, 22 is a shared device, 2
3 is a receiving circuit, 24 is a transmitting circuit, 25 is a control circuit, 26
is a weak electric field detection circuit, 27.30 is an alarm generation circuit, 2
8 is a call termination signal generation circuit, 29 is an alarm detection circuit, 31
is a demodulation circuit, and 32 is a modulation circuit.
アンテナ、２１による受信信号は共用器２２から受信回
路２３に加えられ、受信出力信号として復調回路３１と
弱電界検出回路２６とに加えられ、復調回路３１により
復調された音声信号は、回線制御局を介して接続された
一般加入者へ送出される。又その一般加入者からの音声
信号は、変調回路３２により変調され、送信回路２４か
ら共用器２２を介してアンテナ２１に加えられ、移動局
に向けて送信される。The signal received by the antenna 21 is applied from the duplexer 22 to the receiving circuit 23, and is applied as a received output signal to the demodulation circuit 31 and the weak electric field detection circuit 26.The audio signal demodulated by the demodulation circuit 31 is sent to the line control station. It is sent to general subscribers connected via. The voice signal from the general subscriber is modulated by the modulation circuit 32, applied to the antenna 21 from the transmission circuit 24 via the duplexer 22, and transmitted to the mobile station.
弱電界検出回路２６は、受信回路２３の受信出力信号レ
ベルを基に受信電界を検出するものであり、第１とそれ
より低い第２の闇値を設定し、受信電界が第１の閾値よ
り低い場合にアラーム発生回路２７を起動してアラーム
信号ａを発生させ、更に受信電界が低下して第２の闇値
より低くなると、終話信号発生回路２８を起動して終話
信号すを発生させる。即ち、アラーム発生回路２７から
のアラーム信号ａは、終話信号すが発生される予告信号
となるものである。The weak electric field detection circuit 26 detects a received electric field based on the received output signal level of the receiving circuit 23, and sets a first and a second lower dark value so that the received electric field is lower than the first threshold value. If the received electric field is low, the alarm generation circuit 27 is activated to generate an alarm signal a, and when the received electric field further decreases to become lower than the second dark value, the call termination signal generation circuit 28 is activated to generate a termination signal a. let That is, the alarm signal a from the alarm generating circuit 27 serves as a warning signal that the call termination signal will be generated.
アラーム発生回路２７から発生されたアラーム信号ａは
、制御回路２５を介して送信回路２４から移動局に送信
され、又回線制御局を介して通話中の一般加入者へ送信
される。又終話信号発生回路２８からの終話信号すは、
制御回路２５を介して送信回路２４から移動局に送信さ
れ、又制御回路２５は終話信号すにより終話処理を開始
する。The alarm signal a generated by the alarm generation circuit 27 is transmitted from the transmission circuit 24 to the mobile station via the control circuit 25, and is also transmitted to the general subscriber who is talking via the line control station. Also, the end of call signal from the end of call signal generation circuit 28 is
The signal is transmitted from the transmitting circuit 24 to the mobile station via the control circuit 25, and the control circuit 25 starts call termination processing in response to the call termination signal.
従って、アラーム発生回路２７からアラーム信号ａが発
生された後に、受信電界が上昇すれば、アラーム信号ａ
の発生は停止され、且つ終話信号発生回路２８からの終
話信号すの発生も生じないことになる。Therefore, if the received electric field increases after the alarm signal a is generated from the alarm generation circuit 27, the alarm signal a
The generation of the call-end signal is stopped, and the call-end signal generation circuit 28 no longer generates the call-end signal.
又移動局からのアラーム信号を受信した時は、復調回路
３１により復調されたベースバンド信号を基にアラーム
検出回路２９で検出され、アラーム発生回路３０が起動
されてアラーム信号Ｃがざ生される。このアラーム信号
Ｃは回線制御局をイして通話中の一般加入者へ送信され
る。When an alarm signal is received from a mobile station, it is detected by the alarm detection circuit 29 based on the baseband signal demodulated by the demodulation circuit 31, and the alarm generation circuit 30 is activated to generate the alarm signal C. . This alarm signal C is sent to the line control station to the general subscriber who is talking.
移動局は、第３図に示すＩＩｒＩｆｃを有し、４１はフ
ンテナ、４２は共用器、４３は受信回路、４４軸送信回
路、４５は制御回路、４６は弱電界検出回路、４７．４
８はアラーム発生回路、４９は電圧検出回路、５０は電
源、５１はハンドセット部、５２はスピーカ、５３はマ
イクロホン、５４は祠しボタンダイヤルを示し、受信回
路４３からの受信出力信号を復調する復調回路及び送信
音声信号を変調する変調回路は簡単化の為に図示を省略
している。The mobile station has IIrIfc shown in FIG. 3, 41 is a antenna, 42 is a duplexer, 43 is a receiving circuit, 44-axis transmitting circuit, 45 is a control circuit, 46 is a weak electric field detection circuit, 47.4
8 is an alarm generation circuit, 49 is a voltage detection circuit, 50 is a power supply, 51 is a handset unit, 52 is a speaker, 53 is a microphone, 54 is a shrine button dial, and a demodulator that demodulates the received output signal from the receiving circuit 43 The circuit and the modulation circuit that modulates the transmitted audio signal are not shown for the sake of simplicity.
弱電界検出回路４６は、基地局の弱電界検出回路２６の
第１の闇値と同程度の闇値が設定され、受信電波の電界
がこの閾値以下となると、アラーム発生回路４７を起動
して、アラーム信号ｄを発生させる。このアラーム信号
ｄは制御回路４５を介して送信回路４４から基地局へ送
信され、又ハンドセット部５１に加えられて、アラーム
音がスピーカ５２等から発生される。従って、電界強度
が低下した位置に移動したことが判る。The weak electric field detection circuit 46 is set to a darkness value comparable to the first darkness value of the weak electric field detection circuit 26 of the base station, and when the electric field of the received radio wave becomes less than this threshold value, it activates the alarm generation circuit 47. , generates an alarm signal d. This alarm signal d is transmitted from the transmitting circuit 44 to the base station via the control circuit 45, and is also applied to the handset section 51, and an alarm sound is generated from the speaker 52 or the like. Therefore, it can be seen that the object has moved to a position where the electric field strength has decreased.
又電池等の電源５０の電圧が所定値以下に低下したこと
を電圧検出回路４９で検出すると、アラーム発生回路４
８を起動してアラーム信号ｅを発生させる。このアラー
ム信号ｅも、アラーム発生回路４７からのアラーム信号
ｄと同様に、制御量１４５を介して送信、回路４４から
基地局へ送信され、且つハンドセット部５１に加えられ
て、アラーム音が発生される。Further, when the voltage detection circuit 49 detects that the voltage of the power source 50 such as a battery has decreased below a predetermined value, the alarm generation circuit 4
8 to generate an alarm signal e. Similar to the alarm signal d from the alarm generation circuit 47, this alarm signal e is also transmitted via the control variable 145, transmitted from the circuit 44 to the base station, and added to the handset section 51 to generate an alarm sound. Ru.
又基地局から送出されたアラーム信号を受信した場合は
、アラーム信号ｄ、ｅと同様にスピーカ５２等によりア
ラーム音が発生される。Further, when an alarm signal sent from the base station is received, an alarm sound is generated by the speaker 52 or the like similarly to the alarm signals d and e.
従って、移動局では、基地局に於ける受信電波の電界低
下による回線切断が生じる前に、アラーム信号により予
告されるので、突然に通話断となることを防止すること
が可能となり、又通話断となった場合の原因を認識でき
ることになる。Therefore, the mobile station is notified by an alarm signal before the line is disconnected due to a drop in the electric field of the received radio waves at the base station, making it possible to prevent a sudden call disconnection. You will be able to recognize the cause when this occurs.
本発明は、前述の実施例にのみ限定されるものではなく
、種々付加変更することができるものであり、例えば、
前述の実施例に於いて、基地局と移動局とに於けるアラ
ーム発生回路２７．３０゜４７．４８からのアラーム信
号の周波数や断続等の形式をそれぞれ異なるようにすれ
ば、受信電界強度の低下やｗａｉｔ圧低下等を区別して
警告することができる。又基地局と移動局とのそれぞれ
の２個のアラーム発生回路を第１図に示すように、１個
にまとめて同一の或いは異なるアラーム信号を発生させ
る構成とすることも可能である。The present invention is not limited to the above-mentioned embodiments, but can be modified in various ways, such as:
In the above-mentioned embodiment, if the frequency and format of the alarm signal from the alarm generation circuits 27, 30, 47, 48 in the base station and mobile station are made different, the received electric field strength can be changed. It is possible to distinguish between a drop in wait pressure, a drop in wait pressure, etc., and give a warning. Furthermore, as shown in FIG. 1, the two alarm generating circuits of the base station and mobile station can be combined into one circuit to generate the same or different alarm signals.
又基地局の弱電界検出回路２６は、第１と第２との閾値
を設定して受信電界の強度を識別するものであるが、閾
値を−っとし、受信電界がその閾値以下に低下した時に
、アラーム発生回路２７からアラーム信号ａを発生させ
、制御回路２５ではそれによりアラーム信号ａの送信を
行わせると共にタイマを起動して、設定時間以上継続し
てアラーム信号ａが発生されている場合に、終話信号発
生回路２８を起動して、終話信号すを発生させるように
制御することも可能である。The base station's weak electric field detection circuit 26 sets first and second thresholds to identify the strength of the received electric field. When the alarm signal a is generated from the alarm generation circuit 27 and the control circuit 25 transmits the alarm signal a and starts a timer, if the alarm signal a continues to be generated for a set time or longer. Additionally, it is also possible to activate the call termination signal generation circuit 28 and control it to generate a call termination signal.
以上説明したように、本発明は、基地局ｌに於いて、弱
電界検出部４により移動局２からの受信電波の電界強度
の低下を検出した時に、アラーム発生部５からアラーム
信号を移動局２及び通話相手に送出した後に、終話処理
を行い、又アラーム検出部６により移動局２からのアラ
ーム信号を受信検出した時に、通話相手にアラーム信号
を送出し、移動局２に於いては、弱電界検出部８により
基地局１からの受信電波の電界強度の低下を検出した時
及び電圧検出部１０により電源電圧の低下を検出した時
に、アラーム発生部９からアラーム信号を基地局ｌに送
出するものであり、アラーム信号が送出された後に通話
断となるから、電界強度の低下或いは移動局２の電源電
圧の低下であることを識別できることになる。As explained above, in the present invention, when the weak electric field detection section 4 detects a decrease in the electric field strength of the received radio waves from the mobile station 2 in the base station l, the alarm generation section 5 sends an alarm signal to the mobile station. 2 and after sending it to the other party, performs call termination processing, and when the alarm detection unit 6 detects reception of an alarm signal from the mobile station 2, sends an alarm signal to the other party, and the mobile station 2 , when the weak electric field detection section 8 detects a decrease in the electric field strength of the received radio waves from the base station 1, and when the voltage detection section 10 detects a decrease in the power supply voltage, the alarm generation section 9 sends an alarm signal to the base station l. Since the call is interrupted after the alarm signal is sent out, it is possible to identify that it is a drop in the electric field strength or a drop in the power supply voltage of the mobile station 2.
又通話断となる前に、移動局２は電界強度の大きい位置
に移動するか、或いは電源の電池の交換等を行うことに
より、通話を継続することが可能となる。従って、移動
無線電話のサービスを向上することができる利点がある
。Furthermore, before the call is interrupted, the mobile station 2 can continue the call by moving to a position where the electric field strength is greater or by replacing the battery of the power source. Therefore, there is an advantage that the service of mobile radio telephones can be improved.
第１図は本発明の原理説明図、第２図は本発明の実施例
の基地局の要部ブロック図、第３図は本発明の実施例の
移動局の要部ブロック図、第４図は移動無線電話システ
ムの説明図である。
ｌは基地局、２は移動局、３．７は送受信部、４．８は
弱電界検出部、５．９はアラーム発生部、６はアラーム
検出部、１０は電圧検出部、１１はハンドセ・ノドであ
る。FIG. 1 is a diagram explaining the principle of the present invention, FIG. 2 is a block diagram of the main parts of a base station according to an embodiment of the invention, FIG. 3 is a block diagram of main parts of a mobile station according to an embodiment of the invention, and FIG. FIG. 1 is an explanatory diagram of a mobile radio telephone system. 1 is a base station, 2 is a mobile station, 3.7 is a transmission/reception unit, 4.8 is a weak electric field detection unit, 5.9 is an alarm generation unit, 6 is an alarm detection unit, 10 is a voltage detection unit, and 11 is a handset. It's throat.
Claims (1)
ステムに於いて、 前記基地局（１）は、送受信部（３）と弱電界検出部（
４）とアラーム発生部（５）とアラーム検出部（６）と
を備え、 前記移動局（２）は、送受信部（７）と弱電界検出部（
８）とアラーム発生部（９）と電圧検出部（１０）とを
備え、 前記基地局（１）は、前記弱電界検出部（４）により受
信電波の電界低下を検出した時に、前記アラーム発生部
（５）からのアラーム信号を前記移動局（２）と通話相
手とに送出した後、終話処理を行い、前記アラーム検出
部（６）により前記移動局（２）からのアラーム信号を
検出した時に、通話相手にアラーム信号を送出し、 前記移動局（２）は、前記弱電界検出部（８）による受
信電波の電界低下を検出した時、及び前記電圧検出部（
１０）により電源電圧の低下を検出した時に、前記アラ
ーム発生部（９）からのアラーム信号を前記基地局（１
）に送出する ことを特徴とする移動無線電話システム。[Claims] In a mobile radio telephone system consisting of a base station (1) and a mobile station (2), the base station (1) comprises a transmitting/receiving section (3) and a weak electric field detecting section (
4), an alarm generating section (5), and an alarm detecting section (6), and the mobile station (2) includes a transmitting/receiving section (7) and a weak electric field detecting section (
8), an alarm generation section (9), and a voltage detection section (10), and the base station (1) generates the alarm when the weak electric field detection section (4) detects a decrease in the electric field of the received radio wave. After transmitting the alarm signal from the mobile station (2) and the other party, a call termination process is performed, and the alarm detection unit (6) detects the alarm signal from the mobile station (2). When the mobile station (2) detects a decrease in the electric field of the received radio wave by the weak electric field detection section (8), and the mobile station (2) sends an alarm signal to the other party,
When a drop in power supply voltage is detected by the base station (10), an alarm signal from the alarm generator (9) is transmitted to the base station (10).
) A mobile radiotelephone system characterized by transmitting to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1320662A JP2787601B2 (en) | 1989-12-12 | 1989-12-12 | Mobile radio telephone system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1320662A JP2787601B2 (en) | 1989-12-12 | 1989-12-12 | Mobile radio telephone system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03182129A true JPH03182129A (en) | 1991-08-08 |
| JP2787601B2 JP2787601B2 (en) | 1998-08-20 |
Family
ID=18123924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1320662A Expired - Fee Related JP2787601B2 (en) | 1989-12-12 | 1989-12-12 | Mobile radio telephone system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2787601B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07203532A (en) * | 1993-12-28 | 1995-08-04 | Nec Corp | Digital mobile communication system |
| EP0730388A2 (en) * | 1995-02-28 | 1996-09-04 | Sony Corporation | Method of and apparatus for diagnosing personal communication system |
| US5905950A (en) * | 1995-07-12 | 1999-05-18 | Telefonaktienbolaget L M Ericsson | Method and apparatus for providing fixed cellular functionality |
| US6188891B1 (en) * | 1997-06-14 | 2001-02-13 | Yaesu Musen Co., Ltd., | Radio communication apparatus and method for radio communication |
| US6456835B1 (en) * | 1999-01-19 | 2002-09-24 | Tantivy Communications, Inc. | Arbitration method for high power transmissions in a code division multiple access system |
| US6459896B1 (en) * | 1999-10-18 | 2002-10-01 | Gateway, Inc. | Notification of low-battery in a wireless network |
| JP2006295517A (en) * | 2005-04-11 | 2006-10-26 | Oki Electric Ind Co Ltd | Access point of wireless lan |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006054789A (en) | 2004-08-16 | 2006-02-23 | Denso Corp | Audio output device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01196947A (en) * | 1988-02-01 | 1989-08-08 | Mitsubishi Electric Corp | Cordless telephone set |
-
1989
- 1989-12-12 JP JP1320662A patent/JP2787601B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01196947A (en) * | 1988-02-01 | 1989-08-08 | Mitsubishi Electric Corp | Cordless telephone set |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07203532A (en) * | 1993-12-28 | 1995-08-04 | Nec Corp | Digital mobile communication system |
| EP0730388A2 (en) * | 1995-02-28 | 1996-09-04 | Sony Corporation | Method of and apparatus for diagnosing personal communication system |
| US5805666A (en) * | 1995-02-28 | 1998-09-08 | Sony Corporation | Method of and apparatus for diagnosing personal communication system |
| EP0730388A3 (en) * | 1995-02-28 | 1999-07-21 | Sony Corporation | Method of and apparatus for diagnosing personal communication system |
| US5905950A (en) * | 1995-07-12 | 1999-05-18 | Telefonaktienbolaget L M Ericsson | Method and apparatus for providing fixed cellular functionality |
| US6188891B1 (en) * | 1997-06-14 | 2001-02-13 | Yaesu Musen Co., Ltd., | Radio communication apparatus and method for radio communication |
| US6456835B1 (en) * | 1999-01-19 | 2002-09-24 | Tantivy Communications, Inc. | Arbitration method for high power transmissions in a code division multiple access system |
| US6459896B1 (en) * | 1999-10-18 | 2002-10-01 | Gateway, Inc. | Notification of low-battery in a wireless network |
| JP2006295517A (en) * | 2005-04-11 | 2006-10-26 | Oki Electric Ind Co Ltd | Access point of wireless lan |
| JP4561449B2 (en) * | 2005-04-11 | 2010-10-13 | 沖電気工業株式会社 | Wireless LAN access point |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2787601B2 (en) | 1998-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |