JP2913324B2 - Wireless relay system - Google Patents
Wireless relay systemInfo
- Publication number
- JP2913324B2 JP2913324B2 JP17981090A JP17981090A JP2913324B2 JP 2913324 B2 JP2913324 B2 JP 2913324B2 JP 17981090 A JP17981090 A JP 17981090A JP 17981090 A JP17981090 A JP 17981090A JP 2913324 B2 JP2913324 B2 JP 2913324B2
- Authority
- JP
- Japan
- Prior art keywords
- station
- mobile station
- relay
- relay station
- frequency
- 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
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- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Description
【発明の詳細な説明】 〔概要〕 例えば、市町村防災行政無線システムのうち、中継局
を介して移動局相互間および移動局・基地局間の通話を
行うシステムにおいて使用される無線中継システムに関
し、 移動局と基地局局、または移動局相互間の通話が円滑に
行われる様にすることを目的とし、 それぞれ固有の識別符号を有する移動局と基地局と中
継局とが設けられ、移動局相互間、移動局・基地局間の
通話を中継局を介して行う無線中継システムにおいて、 移動局は、移動局周波数構成（中継局へのf1送信，中
継局からのf2受信）及び中継局周波数構成（移動局への
f2送信，移動局からのf1受信）の両機能を有する送受信
機（１）のほか、更に応答信号検出手段（２）及び応答
信号検出手段の検出結果に対応するチャンネル切替制御
信号を出力するチャンネル切替制御手段（３）を備え、 中継局周波数構成（移動局へのf2送信，移動局からの
f1受信）の送受信機（４）を有する中継局は、移動局か
らの呼出信号中の送信元識別符号を検出した時に応答信
号を返送する符号検出・応答返送手段（５）を備え、 移動局は、移動局周波数構成で機能する送受信機
（１）を介して送信先識別符号と共に送信元識別符号を
付加した呼出信号を周波数f1で中継局に送出した後所定
時間経過しても応答信号検出手段が中継局からの周波数
f2による応答信号を検出出来ない場合、チャンネル切替
制御手段は応答信号検出手段からの未検出の検出結果に
対応するチャンネル切替制御信号を送受信機（１）に出
力し、送受信機の周波数構成を移動局周波数構成から中
継局周波数構成に切替えし、その後該移動局は最寄りの
別の移動局（６）及び中継局を介して相手局と接続され
るように構成する。DETAILED DESCRIPTION OF THE INVENTION [Summary] For example, in a municipal disaster prevention administrative radio system, a radio relay system used in a system for performing a call between mobile stations and a mobile station / base station via a relay station, A mobile station, a base station, and a relay station each having a unique identification code are provided for the purpose of facilitating communication between the mobile station and the base station station or the mobile station. during, the wireless relay system performed via a relay station a call between mobile stations, base station, mobile station, mobile station frequency configuration (transmission f 1 to the relay station, f 2 received from the relay station) and the relay station Frequency configuration (for mobile stations
f 2 transmission, in addition to the transceiver having both functions of f 1 received) from the mobile station (1), further response signal detection means (2) and outputs a channel switching control signal corresponding to the detection result of the response signal detecting means Channel switching control means (3) to perform the relay station frequency configuration (f 2 transmission to the mobile station,
relay station having f 1 received) transceiver (4) is provided with code detection and response returning means for returning a response signal (5) when it detects the transmission source identification code of the calling signal from the mobile station, the mobile station, response after a predetermined time period after transmitting to the relay station a call signal by adding the transmission source identification code with the destination identification code via the transceiver (1) that functions in the mobile station frequency constituted by the frequency f 1 The signal detection means is the frequency from the relay station
If you can not detect a response signal by f 2, the channel switching control means outputs a channel switching control signal corresponding to the detected result of undetected from the response signal detecting means to the transceiver (1), the frequency structure of a transceiver Switching from the mobile station frequency configuration to the relay station frequency configuration, the mobile station is then configured to be connected to the other station via the nearest other mobile station (6) and the relay station.
本発明は、例えば、市町村防災行政無線システムのう
ち、中継局を介して移動局相互間および移動局・基地局
間の通話を行うシステムで使用される無線中継システム
に関するものである。The present invention relates to a wireless relay system used in, for example, a system for performing communication between mobile stations and between a mobile station and a base station via a relay station in a municipal disaster management radio system.
市町村防災行政無線システムは地域の防災，応急救
助，災害復旧に関する業務に使用することを主目的とし
て市町村が独自に設置するシステムで平常時には一般行
政事務連絡にも使用される。The municipal disaster prevention administrative radio system is a system that is set up by municipalities with the primary purpose of being used for operations related to local disaster prevention, emergency rescue and disaster recovery, and is also used for general administrative affairs communication in normal times.
このシステムは、固定系，移動系およびテレメータ系
またはこれらの組み合わせで構成されるが、固定系は自
治体に設置された親局から60MHz帯の無線伝送路を通じ
て住民に情報を伝達するシステムであり、移動系は各市
町村の本部に設けられる基地局と移動局（車載局，携帯
局）および移動局相互間で主として400MHz帯の電波を使
用して通話を行うシステムである。This system consists of a fixed system, a mobile system, a telemeter system, or a combination of these. The fixed system is a system that transmits information from the master station installed in the local government to residents through a 60 MHz band wireless transmission line. The mobile system is a system in which communication is performed between base stations and mobile stations (vehicle stations, mobile stations) provided at the headquarters of each municipality and between mobile stations using mainly radio waves in the 400 MHz band.
ここで、移動系システムで通話を行う際、移動局と基
地局間、または移動局相互間の通話が円滑に行われる様
にすることが必要である。Here, when making a call in the mobile system, it is necessary to make the call between the mobile station and the base station or between the mobile stations smooth.
第４図は市町村防災行政無線システムのうちの移動系
システム概念図を示す。FIG. 4 shows a conceptual diagram of a mobile system in the municipal disaster management radio system.
図に示す様に移動系システムは基地局，中継局，移動
局（車載局A,B,携帯局）とから構成されている。そし
て、基地局と中継局間は周波数f3の１波単信方式を、移
動局と中継局間は周波数f1,f2の２波単信方式を、中継
局は２波複信方式をそれぞれ使用している。As shown in the figure, the mobile system includes a base station, a relay station, and mobile stations (vehicle stations A, B, and mobile stations). Then, the first wave simplex base station and between the relay station frequency f 3, a two-wave simplex mobile station and between the relay station frequencies f 1, f 2, the relay station 2 Namifukushin method We use each.
この為、基地局から送信した周波数f3の電波は中継局
で周波数f2の電波に変換されて各移動局に送出される。
一方、移動局から送信した周波数f1の電波は中継局で周
波数f2の電波と周波数f3の電波に変換され、前者の電波
は他の移動局に送出されるが、後者の電波は基地局に送
出される。Therefore, radio waves of the frequency f 3 which is transmitted from the base station is transmitted to each mobile station is converted to radio waves of frequency f 2 in the relay station.
On the other hand, radio waves of the frequency f 1 which is transmitted from the mobile station is converted to radio waves of radio wave and the frequency f 3 of the frequency f 2 in the relay station, the former radio wave is transmitted to other mobile stations, the latter radio base Sent to the station.
尚、移動局間の通話が中継局を介して行われるので、
移動局間の直接通話に比べると遠距離まで通話が可能と
なる。In addition, since the call between the mobile stations is performed through the relay station,
Calls can be made over long distances compared to direct calls between mobile stations.
次に、第５図は従来例のブロック図を示す。 Next, FIG. 5 shows a block diagram of a conventional example.
以下、携帯局が別の携帯局と通話をする場合を例にし
て動作を説明する。尚、車載局のブロック図は第５図に
示す携帯局のブロック図と同一であるとする。Hereinafter, the operation will be described by taking a case where a mobile station talks with another mobile station as an example. It is assumed that the block diagram of the vehicle-mounted station is the same as the block diagram of the mobile station shown in FIG.
まず、キーボードで構成されている識別符号設定部分
14で送信先識別符号（ID）を設定すると、識別符号発生
部分13は対応する識別信号を発生し、この識別信号を送
信部12,アンテナ共用器11を介して周波数f1で中継局に
送出する。First, the identification code setting part composed of the keyboard
Destination identification Setting code (ID) 14, the identification code generation section 13 generates a corresponding identification signal, transmitted to the relay station the identification signal by the transmission section 12, a frequency f 1 via the antenna duplexer 11 I do.
尚、送信元，即ち自局識別符号は自動的に送出される
ものとする。It is assumed that the transmission source, that is, the own station identification code is automatically transmitted.
中継局では、アンテナ共用器41を介して携帯局からの
信号が受信機44に入力する。受信機44は受信処理して得
られた受信出力を送信機42で周波数f2の送信信号に変換
して、再びアンテナ共用機を介して送出すると共に、送
受信機43で周波数f3の送信信号に変換して基地局へ送出
する。In the relay station, a signal from the mobile station is input to the receiver 44 via the antenna sharing device 41. The receiver 44 converts the transmission signal of the frequency f 2 at the transmitter 42 was obtained by the reception processing received output again sends out through the antenna sharing device, the transmission signal of the frequency f 3 in transceiver 43 And sends it to the base station.
別の携帯局ではアンテナ共用器11を介して中継局から
の信号が受信機15に入力する。受信機は受信処理して識
別符号を取り出し、自局の識別符号と一致していること
を検出して呼び出されたことを知る。そこで、携帯局と
別の携帯局とは中継器を介して通話が行われる。In another mobile station, a signal from the relay station is input to the receiver 15 via the antenna sharing device 11. The receiver performs the receiving process, extracts the identification code, detects that it matches the identification code of its own station, and knows that it has been called. Therefore, a call is made between the mobile station and another mobile station via a repeater.
尚、上記は携帯局相互間で通話を行う際の説明である
が、車載局相互間または車載局と携帯局間の通話でも同
様である。Note that the above description is for a call between mobile stations, but the same applies to a call between in-vehicle stations or a call between an in-vehicle station and a mobile station.
ここで、車載局と携帯局とを比較すると、送信電力に
ついては、例えば、前者が10Wあるのに対して後者は１
〜5Wであり、アンテナも前者は高利得のものが使用でき
るが、後者は前者のものよりも約４〜10dB程度，利得が
低い。Here, comparing the in-vehicle station and the mobile station, the transmission power is, for example, 10 W for the former and 1 for the latter.
The antenna has a higher gain, but the latter has a lower gain of about 4 to 10 dB than the former.
この為、携帯局の電波が中継局まで届かない場合には
通話が断となり、携帯局と他の移動局、または基地局と
の間の通話が円滑に行われない場合があると云う問題が
ある。For this reason, if the radio wave of the mobile station does not reach the relay station, the call is interrupted, and the call between the mobile station and another mobile station or the base station may not be smoothly performed. is there.
本発明は、移動局と基地局間、または移動局相互間の
通話が円滑に行われる様にすることを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to facilitate a call between a mobile station and a base station or between mobile stations.
上記目的は本発明により、第１図の本発明の原理ブロ
ック図に示す如く、 それぞれ固有の識別符号を有する移動局と基地局と中
継局とが設けられ、移動局相互間、移動局・基地局間の
通話を中継局を介して行う無線中継システムにおいて、 移動局は、移動局周波数構成（中継局へのf1送信，中
継局からのf2受信）及び中継局周波数構成（移動局への
f2送信，移動局からのf1受信）の両機能を有する送受信
機（１）のほか、更に応答信号検出手段（２）及び応答
信号検出手段の検出結果に対応するチャンネル切替制御
信号を出力するチャンネル切替制御手段（３）を備え、 中継局周波数構成（移動局へのf2送信，移動局からの
f1受信）の送受信機（４）を有する中継局は、移動局か
らの呼出信号中の送信元識別符号を検出した時に応答信
号を返送する符号検出・応答返送手段（５）を備え、 移動局は、移動局周波数構成で機能する送受信機
（１）を介して送信先識別符号と共に送信元識別符号を
付加した呼出信号を周波数f1で中継局に送出した後所定
時間経過しても応答信号検出手段が中継局からの周波数
f2による応答信号を検出出来ない場合、チャンネル切替
制御手段は応答信号検出手段からの未検出の検出結果に
対応するチャンネル切替制御信号を送受信機（１）に出
力し、送受信機の周波数構成を移動局周波数構成から中
継局周波数構成に切替えし、その後該移動局は最寄りの
別の移動局（６）及び中継局を介して相手局と接続され
ることを特徴とする無線中継システムによって達成され
る。The object of the present invention is to provide a mobile station, a base station and a relay station each having a unique identification code as shown in the principle block diagram of the present invention in FIG. in wireless relay system that performs a call between stations via a relay station, mobile station, (f 1 transmits to the relay station, f 2 received from the relay station) the mobile station frequency structure and to the relay station frequency configuration (mobile station of
f 2 transmission, in addition to the transceiver having both functions of f 1 received) from the mobile station (1), further response signal detection means (2) and outputs a channel switching control signal corresponding to the detection result of the response signal detecting means Channel switching control means (3) to perform the relay station frequency configuration (f 2 transmission to the mobile station,
relay station having f 1 received) transceiver (4) is provided with code detection and response returning means for returning a response signal (5) when it detects the transmission source identification code of the calling signal from the mobile station, the mobile station, response after a predetermined time period after transmitting to the relay station a call signal by adding the transmission source identification code with the destination identification code via the transceiver (1) that functions in the mobile station frequency constituted by the frequency f 1 The signal detection means is the frequency from the relay station
If you can not detect a response signal by f 2, the channel switching control means outputs a channel switching control signal corresponding to the detected result of undetected from the response signal detecting means to the transceiver (1), the frequency structure of a transceiver This is achieved by a radio relay system characterized by switching from a mobile station frequency configuration to a relay station frequency configuration, after which the mobile station is connected to the other station via another nearest mobile station (6) and the relay station. You.
ここで、上記の様に携帯局が中継局に直接，電波が到
達しない様な位置にいる場合、この携帯局が最寄りの車
載局と直接に通話できれば、この車載局を介して携帯局
の電波を中継局に到達させることができる。Here, if the mobile station is in a position where radio waves do not directly reach the relay station as described above, and if this mobile station can directly communicate with the nearest vehicle-mounted station, the mobile station's radio waves can be transmitted via this vehicle-mounted station. Can reach the relay station.
尚、携帯局と車載局とを直接通話できる様にするに
は、携帯局の送受信周波数の構成を移動局周波数構成か
ら中継局周波数構成に切り替えさせればよい。In order to enable direct communication between the mobile station and the in-vehicle station, the configuration of the transmission / reception frequency of the mobile station may be switched from the mobile station frequency configuration to the relay station frequency configuration.
ところが、携帯局の周波数を中継局周波数構成に切り
替えるか否か、即ち携帯局が中継局まで，直接，電波が
届かない様な位置にあるか否かをオペレータが判断する
のが非常に難しい。However, it is very difficult for the operator to determine whether or not to switch the frequency of the mobile station to the relay station frequency configuration, that is, whether or not the mobile station is directly at a position where radio waves cannot reach the relay station.
そこで、本発明では携帯局から中継局へ通話情報を送
出した時、中継局が受信できたら，受信できたことを携
帯局に知らせる様にした。Therefore, in the present invention, when call information is transmitted from the mobile station to the relay station, if the relay station can receive the call information, the mobile station is notified of the reception.
つまり、携帯局が送受信機を介して識別符号を付加し
た通話情報を該中継局に送出し、所定時間以内に中継局
から応答信号が返送されれば携帯局の電波が中継局に届
いたと判断して、従来と同様に中継局を介して相手局と
通話を行う。In other words, the mobile station sends the call information with the identification code added thereto via the transceiver to the relay station. If a response signal is returned from the relay station within a predetermined time, it is determined that the radio wave of the mobile station has reached the relay station. Then, a call is made to the partner station via the relay station as in the conventional case.
尚、この時の携帯局の送受信周波数の構成は移動局周
波数構成になっている。At this time, the configuration of the transmission / reception frequency of the mobile station is the mobile station frequency configuration.
しかし、所定時間経過しても中継局からの応答信号が
返送できない場合、携帯局の送受信周波数の構成を中継
局の周波数と同一の周波数構成にするので、携帯局の電
波は車載局，中継局を介して相手側に送られる。これに
より、中継することなく通話が継続する。However, if a response signal cannot be returned from the relay station even after a predetermined time has elapsed, the transmission / reception frequency of the mobile station is set to the same frequency configuration as that of the relay station. Is sent to the other party via. As a result, the call continues without relaying.
この様にして、携帯局の電波が中継局まで直接，届か
ない場合でも、車載局と直接，交信できる様にすれば、
携帯局と他の車載局または基地局との間の通話が断にな
ることなく円滑に行われる。In this way, even if the radio wave of the mobile station does not directly reach the relay station, if it is possible to directly communicate with the on-board station,
The call between the mobile station and another on-board station or base station is smoothly performed without interruption.
第２図は本発明の実施例のブロック図、第３図は第２
図の動作説明図を示す。FIG. 2 is a block diagram of an embodiment of the present invention, and FIG.
The operation | movement explanatory drawing of a figure is shown.
ここで、アンテナ共用器11,送信機12,受信機15は送受
信機１の構成部分、識別符号／応答検出部分21は応答信
号検出手段２の構成部分、チャンネル切替制御部分31は
チャネル切替制御手段３の構成部分、アンテナ共用器4
1,送信機42,送受信機43,受信機44は送受信機４の構成部
分、識別符号検出部分51,応答信号送出部分52は符号検
出・応答返送手段５の構成部分を示す。尚、全図を通じ
て同一符号は同一対象物を示す。Here, the antenna duplexer 11, the transmitter 12, and the receiver 15 are constituent parts of the transceiver 1, the identification code / response detecting part 21 is a constituent part of the response signal detecting means 2, and the channel switching control part 31 is a channel switching controlling means. 3 components, antenna duplexer 4
1, a transmitter 42, a transceiver 43, and a receiver 44 are components of the transceiver 4, and an identification code detection portion 51 and a response signal transmission portion 52 are components of the code detection / response return means 5. Note that the same reference numerals indicate the same objects throughout the drawings.
以下、第３図を参照して第２図の動作を説明する。こ
こで、携帯局は送信周波数f1,受信周波数f2の移動局周
波数構成と送信周波数f2,受信周波数f1の中継局周波数
構成の２つの周波数構成を持っていて、チャネル切替制
御信号に対応する周波数構成に切り替えられるとする。Hereinafter, the operation of FIG. 2 will be described with reference to FIG. Here, the mobile station has two frequency configurations, a mobile station frequency configuration of the transmission frequency f 1 and the reception frequency f 2 , and a relay station frequency configuration of the transmission frequency f 2 and the reception frequency f 1. It is assumed that the frequency can be switched to the corresponding frequency configuration.
先ず、携帯局は相手局と連通する為、キーボード構成
の識別符号設定部分14で送信先識別符号を設定すると、
識別符号発生部分13は対応する識別信号を発生し、この
識別信号と送信元である自局の識別符号を含む呼出信号
を送信機12,アンテナ共用器11を介して周波数f1で中継
局に送出する。First, in order for the mobile station to communicate with the partner station, when the destination identification code is set in the identification code setting part 14 of the keyboard configuration,
The identification code generation section 13 generates a corresponding identification signal, and transmits the identification signal and a call signal including the identification code of the transmission source station to the relay station at the frequency f 1 via the transmitter 12 and the antenna duplexer 11. Send out.
中継局では、アンテナ共用器41を介して受信信号が受
信機44に入力する。受信機44は受信処理して得られた受
信出力のうち，識別符号の部分を分離して識別符号検出
部分51に、残りの部分を送信機42と送受信機43の送信部
43に送出する。In the relay station, the received signal is input to the receiver 44 via the antenna sharing device 41. The receiver 44 separates the identification code portion of the reception output obtained by the reception processing into an identification code detection portion 51, and transfers the remaining portion to the transmitter 42 of the transmitter 42 and the transmitter / receiver 43.
Send to 43.
そこで、識別符号検出部分51は送信元識別符号を検出
して応答信号送出部分52に送出する。応答信号送出部分
は生成した応答信号を送信機42に送出する。Thus, the identification code detection section 51 detects the transmission source identification code and sends it to the response signal sending section 52. The response signal transmitting section transmits the generated response signal to the transmitter 42.
送信機42では応答信号と受信機出力をアンテナ共用器
41を介して周波数f2で送出すると共に、送受信機43の送
信部は上記の受信機出力を周波数f3で基地局に送出す
る。In the transmitter 42, the response signal and the receiver output are used as an antenna duplexer.
41 sends out at a frequency f 2 via the transmission portion of the transceiver 43 sends the base station the receiver output at the frequency f 3.
携帯局では中継局からの周波数f2の信号がアンテナ共
用器11を介して受信機15に入力する。受信機15は受信処
理して得られた受信出力のうち，応答信号の部分を識別
符号／応答信号検出部分21に送出する。In the mobile station, a signal of frequency f 2 from the relay station is input to the receiver 15 via the antenna sharing device 11. The receiver 15 sends the response signal portion of the reception output obtained by the reception processing to the identification code / response signal detection portion 21.
識別符号／応答信号検出部分21は中継局からの応答信
号が検出できれば、ここから応答信号検出信号がチャン
ネル切替制御部分31に送出されるので、この切替制御部
分はチャンネル切替制御信号を送出しない。尚、応答信
号が検出できれば、中継局に電波が到達したことの確認
になる。If the identification code / response signal detection section 21 can detect the response signal from the relay station, the response signal detection signal is transmitted to the channel switching control section 31 from here, and therefore this switching control section does not transmit the channel switching control signal. If the response signal can be detected, it is confirmed that the radio wave has reached the relay station.
そこで、携帯局は送信周波数がf1、受信周波数がf2の
移動局周波数構成を引き続き保持するので、中継局を経
由して相手局との通話が行われる（第３図の中継モー
ド，通話の部分）。Therefore, the mobile station continues to maintain the mobile station frequency configuration in which the transmission frequency is f 1 and the reception frequency is f 2 , so that communication with the other station is performed via the relay station (relay mode, call mode in FIG. 3). Part).
次に、携帯局からの周波数f1の電波が中継局まで届か
ない場合、中継局からは応答信号が携帯局に返送されな
い。Then, when the radio wave of the frequency f 1 from the mobile station does not reach the relay station, the response signal from the relay station is not sent back to the mobile station.
携帯局の識別符号／応答信号検出部分21には、例えば
タイマ（図示せず）があって、局識別符号送出と同時に
動作を開始し、所定時間以内に応答信号が検出されない
とチャンネル切替制御部分31に応答検出信号未検出の検
出結果を送出する。The identification code / response signal detection section 21 of the mobile station includes, for example, a timer (not shown). The timer starts operation at the same time as the station identification code is transmitted. If no response signal is detected within a predetermined time, the channel switching control section A detection result indicating that no response detection signal has been detected is sent to 31.
そこで、チャンネル切替制御部分は、自局の送受信周
波数の構成を移動局周波数構成から中継局周波数構成に
切り替えさせるチャンネル切替制御信号を送信機12と受
信機15に送出する。これにより、送信周波数はf2,受信
周波数はf1となり中継局の周波数構成に切り替えられ
る。Therefore, the channel switching control unit transmits a channel switching control signal for switching the transmission / reception frequency configuration of the own station from the mobile station frequency configuration to the relay station frequency configuration to the transmitter 12 and the receiver 15. As a result, the transmission frequency becomes f 2 and the reception frequency becomes f 1 , thereby switching to the frequency configuration of the relay station.
この為、携帯局からの電波は最寄りの車載局６を介し
て中継局に送られ，その後は従来例と同様に他の移動局
及び基地局に送られる。For this reason, the radio wave from the mobile station is transmitted to the relay station via the nearest on-vehicle station 6, and then transmitted to other mobile stations and base stations as in the conventional example.
この場合車載局６は通常中継動作の状態になっていな
いので携帯局が中継局周波数構成で発信する場合には携
帯局は例えば先ず近くにある車載局に対し中継動作をさ
せるコマンド符号を周波数f2で送出する。In this case, since the on-vehicle station 6 is not normally in the relay operation state, when the mobile station transmits in the relay station frequency configuration, the mobile station first transmits a command code for causing the nearby on-vehicle station to perform the relay operation to the frequency f. Send in 2 .
これを受信した車載局では受信機の出力が送信機に入
力されるような中継動作状態となる。The in-vehicle station receiving the signal enters a relay operation state in which the output of the receiver is input to the transmitter.
続いて携帯局は送信先識別番号と送信元識別番号より
なる呼出信号を送信すると、これによって中継動作状態
となっている車載局の受信機の出力はそのまま送信機に
入力され、送信機から周波数f1で中継局に送出され、こ
の車載局を介して携帯局は中継局と接続される。Subsequently, the mobile station transmits a call signal including the transmission destination identification number and the transmission source identification number, whereby the output of the receiver of the vehicle-mounted station in the relay operation state is directly input to the transmitter, and the frequency is transmitted from the transmitter to the transmitter. It sent to the relay station in f 1, the mobile station via the in-vehicle station is connected to the relay station.
これにより携帯局として中継局まで電波が届かない場
合でも最寄りの車載局と中継局とを介して携帯局と他の
移動局または基地局との間の通信が円滑におこなわれ
る。As a result, even when radio waves do not reach the relay station as a mobile station, communication between the mobile station and another mobile station or base station is smoothly performed via the nearest on-vehicle station and the relay station.
ここで通話が終了すれば携帯局の中継局周波数構成は
リセットされてもとの移動局周波数構成にセットされ
る。Here, if the call ends, the relay station frequency configuration of the mobile station is reset and set to the original mobile station frequency configuration.
以上詳細に説明した様に本発明によれば、携帯局とし
て中継局まで電波が届かない場合でも、携帯局と他の移
動局、または基地局との間の通話が円滑に行われると云
う効果がある。As described above in detail, according to the present invention, even when radio waves do not reach a relay station as a mobile station, an effect that a call between the mobile station and another mobile station or a base station can be performed smoothly. There is.
第１図は本発明な原理ブロック図、 第２図は本発明の実施例のブロック図、 第３図は第２図の動作説明図、 第４図はシステム概念図、 第５図は従来例のブロック図を示す。 図において、 1,4は送受信機、 ２は応答信号検出手段、 ３はチャンネル切替制御手段、 ５は符号検出・応答返送手段、 ６は別の移動局を示す。 FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is an explanatory diagram of the operation of FIG. 2, FIG. FIG. In the figure, reference numerals 1 and 4 denote transceivers, 2 denotes response signal detecting means, 3 denotes channel switching control means, 5 denotes code detection / response returning means, and 6 denotes another mobile station.
Claims (1)
基地局と中継局とが設けられ、移動局相互間、移動局・
基地局間の通話を中継局を介して行う無線中継システム
において、 移動局は、移動局周波数構成（中継局へのf1送信，中継
局からのf2受信）及び中継局周波数構成（移動局へのf2
送信，移動局からのf1受信）の両機能を有する送受信機
（１）のほか、更に応答信号検出手段（２）及び応答信
号検出手段の検出結果に対応するチャンネル切替制御信
号を出力するチャンネル切替制御手段（３）を備え、 中継局周波数構成（移動局へのf2送信，移動局からのf1
受信）の送受信機（４）を有する中継局は、移動局から
の呼出信号中の送信元識別符号を検出した時に応答信号
を返送する符号検出・応答返送手段（５）を備え、 移動局は、移動局周波数構成で機能する送受信機（１）
を介して送信先識別符号と共に送信元識別符号を付加し
た呼出信号を周波数f1で中継局に送出した後所定時間経
過しても応答信号検出手段が中継局からの周波数f2によ
る応答信号を検出出来ない場合、チャンネル切替制御手
段は応答信号検出手段からの未検出の検出結果に対応す
るチャンネル切替制御信号を送受信機（１）に出力し、
送受信機の周波数構成を移動局周波数構成から中継局周
波数構成に切替えし、その後該移動局は最寄りの別の移
動局（６）及び中継局を介して相手局と接続されること
を特徴とする無線中継システム。A mobile station, a base station, and a relay station each having a unique identification code are provided.
Calls between base stations in a wireless relay system performed via the relay station, the mobile station, (f 1 transmits to the relay station, f 2 received from the relay station) the mobile station frequency configuration and relay station frequency configuration (mobile station To f 2
Transmitting, in addition to a transceiver having both functions of f 1 received) from the mobile station (1), the channel for outputting a channel switching control signal corresponding to the further response signal detection means (2) and the detection result of the response signal detecting means a switching control unit (3), f 2 transmitted to the relay station frequency configuration (mobile station, f 1 from mobile station
The relay station having the transceiver (4) of (reception) includes code detection / response return means (5) for returning a response signal when detecting a transmission source identification code in a call signal from the mobile station. , Transceiver functioning in mobile station frequency configuration (1)
A response signal by the frequency f 2 from the transmission source identification code call signal obtained by adding to a frequency f 1 even after the elapse of a predetermined time after transmitting the relay station response signal detection means the relay station with the destination identification code via the If the detection is not possible, the channel switching control means outputs a channel switching control signal corresponding to the undetected detection result from the response signal detecting means to the transceiver (1),
The frequency configuration of the transceiver is switched from the mobile station frequency configuration to the relay station frequency configuration, and then the mobile station is connected to the other station via another nearby mobile station (6) and the relay station. Wireless relay system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17981090A JP2913324B2 (en) | 1990-07-06 | 1990-07-06 | Wireless relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17981090A JP2913324B2 (en) | 1990-07-06 | 1990-07-06 | Wireless relay system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0468924A JPH0468924A (en) | 1992-03-04 |
| JP2913324B2 true JP2913324B2 (en) | 1999-06-28 |
Family
ID=16072291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17981090A Expired - Fee Related JP2913324B2 (en) | 1990-07-06 | 1990-07-06 | Wireless relay system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2913324B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3150092B2 (en) * | 1997-11-20 | 2001-03-26 | 日本電気移動通信株式会社 | Regional disaster prevention radio relay mobile station |
-
1990
- 1990-07-06 JP JP17981090A patent/JP2913324B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0468924A (en) | 1992-03-04 |
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| LAPS | Cancellation because of no payment of annual fees |