JPH0767170A - Mobile communication system - Google Patents
Mobile communication systemInfo
- Publication number
- JPH0767170A JPH0767170A JP5214309A JP21430993A JPH0767170A JP H0767170 A JPH0767170 A JP H0767170A JP 5214309 A JP5214309 A JP 5214309A JP 21430993 A JP21430993 A JP 21430993A JP H0767170 A JPH0767170 A JP H0767170A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission
- amplifier
- test
- communication system
- 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
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、移動通信システムの通
話試験装置に利用する。特に、時分割複信方式の移動通
信システムにおける集中局と基地局との間の通話試験を
行う通話試験装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a call test device for a mobile communication system. In particular, the present invention relates to a call test device for performing a call test between a central station and a base station in a time division duplex mobile communication system.
【０００２】[0002]
【従来の技術】図５は従来例の移動通信システムのブロ
ック構成図である。2. Description of the Related Art FIG. 5 is a block diagram of a conventional mobile communication system.
【０００３】従来、移動通信システムは、例えば特開平
１−２９７９１９号公報に記載されているように、基地
局内に試験用送受信機を設置することにより行われてい
た。図５において、基地局１０Ｃには試験用送受信機１
８を設置し、また集中局２０Ｃには通話試験用電話機２
６を設置する。集中局２０Ｃと基地局１０Ｃとの間の通
話試験時には集中局２０Ｃ内の回線選択装置２５にて基
地局１０Ｃとの間の伝送路３０を選択し、基地局１０Ｃ
では、試験用送受信機１８と送受信機１１Ｃとの間は無
線区間で信号を実際に送受する。以上の接続により集中
局２０Ｃの通話試験用電話機２６と基地局１０Ｃの試験
用送受信機１８との間で、送受信機１１Ｃを含めた伝送
路３０の試験を行うことができる。Conventionally, a mobile communication system has been carried out by installing a test transceiver in a base station as described in, for example, Japanese Unexamined Patent Publication No. 1-297919. In FIG. 5, the base station 10C includes a test transceiver 1
8 is installed, and the telephone 2 for call test is installed in the central station 20C.
Install 6. At the time of a call test between the central station 20C and the base station 10C, the line selecting device 25 in the central station 20C selects the transmission path 30 to the base station 10C, and the base station 10C is selected.
Then, a signal is actually transmitted and received between the test transceiver 18 and the transceiver 11C in a wireless section. With the above connection, the transmission line 30 including the transceiver 11C can be tested between the call test telephone 26 of the central station 20C and the test transceiver 18 of the base station 10C.
【０００４】[0004]
【発明が解決しようとする課題】しかし、このような従
来例の移動通信システムでは、各基地局に本来の送受信
機とは別に試験用送受信機をそれぞれ配置する必要があ
るので、最近の簡易型の移動通信システムにみられるよ
うな極力小型化が要求されるような装置にとっては、ス
ペース、消費電力および経済化等の面から障害となる問
題点があった。特に、通話試験の試験期間を短い期間で
行う場合には試験用送受信機をそれぞれ配置しておく必
要がある。However, in such a conventional mobile communication system, it is necessary to arrange a test transceiver in each base station separately from the original transceiver. However, there is a problem in that the device, which is required to be miniaturized as much as possible in the mobile communication system, obstructs space, power consumption, and economy. Especially, when the test period of the call test is short, it is necessary to arrange a test transceiver.
【０００５】本発明は前記の問題点を解決するもので、
基地局に本来の通信には不要である試験用送受信機を設
置せずに通話試験を行うことができ、基地局の小型化、
低消費電力化および経済化ができる移動通信システムを
提供することを目的とする。The present invention solves the above problems.
It is possible to conduct a call test without installing a transmitter / receiver for testing, which is unnecessary for the original communication in the base station, downsizing the base station,
An object of the present invention is to provide a mobile communication system capable of reducing power consumption and economy.
【０００６】[0006]
【課題を解決するための手段】本発明は、移動局と双方
向の無線通信を行う基地局が複数設けられ、この複数の
基地局について一つ設けられた集中局と、この複数の基
地局とこの一つの集中局とを接続する双方向の伝送路と
を備え、この一つの集中局には各基地局に対応してこの
伝送路と接続された複数の無線変復調器が配置され、前
記各基地局にはその伝送路から到来する送信用無線周波
数信号を増幅してアンテナに供給する送信増幅器および
このアンテナの信号を増幅して受信用無線周波数信号と
して前記伝送路に送出する受信用増幅器を備えた移動通
信システムにおいて、前記集中局に、試験用送受信機
と、この試験用送受信機を前記伝送路に接続する接続手
段と、前記無線変復調器の低周波側に接続する試験用電
話機とを備え、前記各基地局に、試験時には前記送信増
幅器の出力を前記受信増幅器の入力に折り返し接続する
切替手段を備えたことを特徴とする。SUMMARY OF THE INVENTION The present invention is provided with a plurality of base stations for bidirectional wireless communication with a mobile station, one central station for each of the plurality of base stations, and a plurality of the base stations. And a bidirectional transmission line connecting this one central station with a plurality of radio modulators / demodulators connected to this transmission line corresponding to each base station. In each base station, a transmission amplifier that amplifies a transmission radio frequency signal coming from its transmission line and supplies it to an antenna, and a reception amplifier that amplifies the signal of this antenna and sends it to the transmission line as a reception radio frequency signal In a mobile communication system comprising: a centralized station, a test transceiver, a connecting means for connecting the test transceiver to the transmission path, and a test telephone connected to the low frequency side of the wireless modem. Comprising the The base station, at the time of testing, characterized in that a switching means for folding connecting the output of the transmission amplifier to an input of the receiving amplifier.
【０００７】また、本発明は、前記接続手段に、試験時
には前記無線変復調器の変調信号を復調入力に折り返す
切換回路を備えることができる。Further, according to the present invention, the connection means may be provided with a switching circuit for returning the modulated signal of the radio modulator / demodulator to a demodulation input during a test.
【０００８】さらに、本発明は、前記伝送路に伝送され
る信号は時分割複信信号であることができる。Further, according to the present invention, the signal transmitted to the transmission line may be a time division duplex signal.
【０００９】また、本発明は、その時分割複信信号は、
複数の連続する送信タイムスロットおよびこの送信タイ
ムスロットに続くこれと同数の受信タイムスロットが所
定の周期で繰り返される信号であり、前記切替手段は、
前記集中局から到来する通話試験信号の送信タイムスロ
ットを前記時分割複信信号の周期の半分の時間遅延して
受信タイムスロットに変換する折返回路と、前記送信増
幅器からの通話試験信号をこの折返回路に切り替えて前
記受信用増幅器に接続するスイッチとを含むことができ
る。According to the present invention, the time division duplex signal is
The switching means is a signal in which a plurality of consecutive transmission time slots and the same number of reception time slots that follow this transmission time slot are repeated in a predetermined cycle,
A loopback circuit that delays a transmission time slot of a call test signal coming from the central station to a reception time slot by delaying the time by half the period of the time division duplex signal, and a call test signal from the transmission amplifier. A switch for switching to a circuit and connecting to the receiving amplifier.
【００１０】[0010]
【作用】無線変復調器と伝送路との間に、通話試験時に
試験用送受信機を接続する接続手段を設け、またアンテ
ナと送信増幅器および受信増幅器との間に通話試験信号
を折り返す切替手段を設ける。試験用電話機から出力さ
れた通話試験信号は、無線変復調器で変調され接続手段
および伝送路を介して対応する送受信機の送信増幅器に
入力される。送信増幅器の出力は切替手段により受信増
幅器に入力され、受信増幅器の出力は再び伝送路および
接続手段を介して試験用送受信機の受信部に入力され
る。逆に、試験用送受信機から出力された通話試験信号
は接続手段および無線伝送路を介して対応する送受信機
の送信増幅器に出力される。送信増幅器の出力は切替手
段により受信増幅器に入力され、受信増幅器の出力は再
び無線伝送路および接続手段を介して無線変復調器に入
力される。無線変復調器で復調された通話試験信号は通
話試験用電話機に入力される。これにより、基地局に本
来の通信には不要である試験用送受信機を設置せずに通
話試験を行うことができ、基地局の小型化、低消費電力
化および経済化ができる。A connecting means for connecting a test transmitter / receiver during a call test is provided between the radio modulator / demodulator and the transmission line, and a switching means for returning the call test signal is provided between the antenna and the transmission amplifier and the reception amplifier. . The call test signal output from the test telephone is modulated by the radio modulator / demodulator and input to the transmission amplifier of the corresponding transceiver via the connecting means and the transmission path. The output of the transmission amplifier is input to the reception amplifier by the switching means, and the output of the reception amplifier is input again to the reception section of the test transceiver through the transmission line and the connection means. On the contrary, the speech test signal output from the test transceiver is output to the transmission amplifier of the corresponding transceiver via the connecting means and the wireless transmission path. The output of the transmission amplifier is input to the reception amplifier by the switching means, and the output of the reception amplifier is input again to the wireless modulator / demodulator via the wireless transmission line and the connecting means. The call test signal demodulated by the wireless modulator / demodulator is input to the call test telephone. As a result, a call test can be performed without installing a test transceiver, which is unnecessary for the original communication, in the base station, and the base station can be downsized, the power consumption can be reduced, and the economy can be reduced.
【００１１】また、送受信機に設けられた切替手段で、
時分割複信信号の所定の周期の半分の時間送信タイムス
ロットを遅延して受信タイムスロットに変換して折り返
すことにより、試験用電話機だけ使用して通話試験を行
うことができる。In addition, the switching means provided in the transceiver,
By delaying the transmission time slot for half the predetermined period of the time division duplex signal, converting it to the reception time slot, and returning it, the call test can be performed using only the test telephone.
【００１２】[0012]
【実施例】本発明の実施例について図面を参照して説明
する。Embodiments of the present invention will be described with reference to the drawings.
【００１３】図１は本発明一実施例移動通信システムの
ブロック構成図である。図１において、移動通信システ
ムは、移動局４０と双方向の無線通信を行う基地局１０
Ａが複数設けられ、複数の基地局１０Ａについて一つ設
けられた集中局２０Ａと、複数の基地局１０Ａと集中局
２０Ａとを接続する双方向の伝送路３０とを備え、集中
局２０Ａには各基地局１０Ａに対応して伝送路３０と接
続された複数の無線変復調器２２が配置され、各基地局
１０Ａの送受信機１１Ａにはその伝送路３０から到来す
る送信用無線周波数信号を増幅してアンテナ１５に供給
する送信増幅器１２およびアンテナ１５の信号を増幅し
て受信用無線周波数信号として伝送路３０に送出する受
信増幅器１３を備える。FIG. 1 is a block diagram of a mobile communication system according to an embodiment of the present invention. In FIG. 1, the mobile communication system includes a base station 10 that performs bidirectional wireless communication with a mobile station 40.
The central station 20A is provided with a plurality of A, and one central station 20A is provided for each of the plurality of base stations 10A, and a bidirectional transmission path 30 that connects the plurality of base stations 10A and the central station 20A. A plurality of radio modulator / demodulators 22 connected to the transmission line 30 are arranged corresponding to each base station 10A, and the transmitter / receiver 11A of each base station 10A amplifies the radio frequency signal for transmission coming from the transmission line 30. A transmission amplifier 12 supplied to the antenna 15 and a reception amplifier 13 that amplifies the signal of the antenna 15 and sends it to the transmission path 30 as a reception radio frequency signal.
【００１４】ここで本発明の特徴とするところは、集中
局２０Ａに、試験用送受信機２３と、試験用送受信機２
３を伝送路３０に接続する接続手段２１と、無線変復調
器２２の低周波側に接続する試験用電話機２４とを備
え、各基地局１０Ａの送受信機１１Ａに、試験時には送
信増幅器１２の出力を受信増幅器１３の入力に折り返し
接続する切替手段１４Ａを備えたことにある。Here, the features of the present invention are that the central station 20A is provided with a test transceiver 23 and a test transceiver 2.
3 is connected to the transmission line 30, and a test telephone 24 connected to the low frequency side of the radio modulator / demodulator 22. The transmitter / receiver 11A of each base station 10A outputs the output of the transmission amplifier 12 during the test. The switching means 14A is connected to the input of the receiving amplifier 13 so as to be folded back.
【００１５】また、伝送路３０に伝送される信号は時分
割複信信号である。The signal transmitted through the transmission line 30 is a time division duplex signal.
【００１６】このような構成の移動通信システムの動作
について説明する。The operation of the mobile communication system having such a configuration will be described.
【００１７】図１において、通常の通話時には、集中局
２０Ａ内の接続手段２１は無線変復調器２２と伝送路３
０とを接続し、また無線変復調器２２は一般加入者電話
と接続されている。また、基地局１０Ａ内の切替手段１
４Ａは送信区間では送信増幅器１２とアンテナ１５を接
続し、また受信区間ではアンテナ１５と受信増幅器１３
とを接続している。In FIG. 1, during a normal call, the connecting means 21 in the central station 20A is a radio modulator / demodulator 22 and a transmission line 3.
0, and the radio modulator / demodulator 22 is connected to a general subscriber telephone. In addition, the switching means 1 in the base station 10A
4A connects the transmission amplifier 12 and the antenna 15 in the transmission section, and the antenna 15 and the reception amplifier 13 in the reception section.
And are connected.
【００１８】通話試験時には、集中局２０Ａにおいて接
続手段２１により基地局１０Ａへの伝送路３０の一つを
選択し試験用送受信機２３を接続し、それに対応して無
線変復調器２２に試験用電話機２４を接続する。また、
基地局１０Ａでは、選択した伝送路３０に対応する切替
手段１４Ａは送信増幅器１２の出力を受信増幅器１３に
接続し、アンテナ１５の接続は行わない。ここで、試験
用電話機２４から無線変復調器２２を通じて入力された
通話試験信号は接続手段２１および伝送路３０を通り基
地局１０Ａ内の送信増幅器１２に入力される。その後
に、通話試験信号は切替手段１４により受信増幅器１３
に入力され、再び伝送路３０を通り、接続手段２１によ
り試験用送受信機２３の受信部に入力される。At the time of a call test, the central station 20A selects one of the transmission paths 30 to the base station 10A by the connecting means 21 to connect the test transceiver 23, and the radio modem 22 correspondingly to the test telephone. 24 is connected. Also,
In the base station 10A, the switching unit 14A corresponding to the selected transmission path 30 connects the output of the transmission amplifier 12 to the reception amplifier 13 and does not connect the antenna 15. Here, the call test signal input from the test telephone 24 through the wireless modulator / demodulator 22 is input to the transmission amplifier 12 in the base station 10A through the connection means 21 and the transmission line 30. After that, the call test signal is sent to the receiving amplifier 13 by the switching means 14.
To the receiver of the test transceiver 23 by the connecting means 21 again via the transmission line 30.
【００１９】逆に、試験用送受信機２３より送信された
通話試験信号は接続手段２１により伝送路３０を通じて
基地局１０Ａ内の送信増幅器１２に入力される。その後
に受信増幅器１３に入力され、再び伝送路３０、接続手
段２１および無線変復調器２２を通じて試験用電話機２
４へ出力される。On the contrary, the call test signal transmitted from the test transceiver 23 is input to the transmission amplifier 12 in the base station 10A through the transmission line 30 by the connecting means 21. After that, it is input to the receiving amplifier 13, and again through the transmission line 30, the connecting means 21, and the wireless modulator / demodulator 22, the test telephone 2
4 is output.
【００２０】前述のように、本実施例は、基地局に試験
用送受信機を配置することなく、無線変復調器、伝送
路、送信増幅器および受信増幅器からなる通話試験を行
うことができる。As described above, this embodiment can carry out a call test consisting of a radio modulator / demodulator, a transmission line, a transmission amplifier and a reception amplifier without disposing a test transceiver in the base station.
【００２１】また、接続手段２１に切換回路を設け、試
験時に無線変復調器２２の変調出力を復調入力に折り返
し、伝送路３０の接続は行わないようにすることによ
り、無線変復調器の試験を行うことができる。Further, a switching circuit is provided in the connection means 21, and the modulation output of the radio modulator / demodulator 22 is returned to the demodulation input at the time of test so that the transmission line 30 is not connected, so that the radio modulator / demodulator is tested. be able to.
【００２２】図２は本発明他の実施例移動通信システム
のブロック構成図である。図３は本発明他の実施例移動
通信システムの時分割複信信号のタイミングチャートで
ある。図４は本発明他の実施例移動通信システムの切替
手段のブロック構成図である。図３において、２Ｔは時
分割複信信号の周期、ｔは伝送路における時分割複信信
号の遅延時間、Ｓ1 〜Ｓn は集中局２０の送信タイムス
ロットおよびＲ〜Ｒnは折返回路が折り返す折返信号
（集中局２０の受信タイムスロット）を示し、また斜線
部分はガードタイムを示す。図５において、１４Ｂは切
替手段、１７は送信増幅器１２からの通話試験信号の送
信タイムスロットを時分割複信信号の周期の半分の時間
遅延して受信タイムスロットに変換する折返回路および
１６は通話試験時に送信増幅器１２からの通話試験信号
をアンテナ１５から折返回路１７に切り替えその出力を
受信増幅器１３に与えるスイッチである。FIG. 2 is a block diagram of a mobile communication system according to another embodiment of the present invention. FIG. 3 is a timing chart of a time division duplex signal of a mobile communication system according to another embodiment of the present invention. FIG. 4 is a block diagram of a switching means of a mobile communication system according to another embodiment of the present invention. In FIG. 3, 2T is the period of the time division duplex signal, t is the delay time of the time division duplex signal on the transmission path, S 1 to S n are the transmission time slots of the central station 20, and R to R n are the folding circuits. The loopback signal (reception time slot of the central station 20) is shown, and the shaded area shows the guard time. In FIG. 5, 14B is a switching means, 17 is a loopback circuit for delaying the transmission time slot of the call test signal from the transmission amplifier 12 by half the period of the time division duplex signal and converting it to a reception time slot, and 16 is a call. This is a switch for switching the call test signal from the transmission amplifier 12 from the antenna 15 to the folding circuit 17 and giving the output to the reception amplifier 13 during the test.
【００２３】図２を参照して、通話試験時の動作につい
て説明する。試験用電話機２４からの通話試験信号は無
線変復調器２２で変調され伝送路３０および接続手段２
１を介して対応する基地局１１Ｂの送信増幅器１２に入
力される。送信増幅器１２の出力はスイッチ１６により
折返回路１７を経由して受信増幅器１３に入力される。
折返回路１７では、送信増幅器１２からの通話試験信号
の送信タイムスロットを時分割複信信号の周期の半分の
時間遅延して受信タイムスロットに変換する。受信増幅
器１３の出力は、再び接続手段２１および伝送路３０を
介して無線変復調器２２に入力され復調される。無線変
復調器２２の出力は試験電話機２４に入力される。以上
の動作により、無線変復調器、伝送路、送信増幅器およ
び受信増幅器からなる通話試験を行うことができる。The operation during the call test will be described with reference to FIG. The call test signal from the test telephone 24 is modulated by the radio modulator / demodulator 22 and is transmitted through the transmission line 30 and the connecting means 2.
1 is input to the transmission amplifier 12 of the corresponding base station 11B. The output of the transmission amplifier 12 is input to the reception amplifier 13 via the folding circuit 17 by the switch 16.
The folding circuit 17 delays the transmission time slot of the speech test signal from the transmission amplifier 12 by half the period of the time division duplex signal and converts it into a reception time slot. The output of the reception amplifier 13 is input again to the wireless modulator / demodulator 22 via the connection means 21 and the transmission path 30 and demodulated. The output of the wireless modem 22 is input to the test telephone 24. With the above operation, the call test including the radio modulator / demodulator, the transmission path, the transmission amplifier and the reception amplifier can be performed.
【００２４】また、接続手段２１に試験用送受信機を接
続することにより、試験用送受信機だけで伝送路、送信
増幅器および受信増幅器の通話試験を行うことができ
る。Further, by connecting the test transceiver to the connecting means 21, it is possible to carry out a call test of the transmission line, the transmission amplifier and the reception amplifier only by the test transceiver.
【００２５】[0025]
【発明の効果】以上説明したように、本発明は、本来の
通信には不要である試験用送受信機を設置せずに通話試
験を行うことができ、基地局の小型化、低消費電力化お
よび経済化ができる優れた効果がある。As described above, according to the present invention, a call test can be conducted without installing a test transceiver which is not necessary for the original communication, and the base station can be downsized and the power consumption can be reduced. And there is an excellent effect that can be made economical.
【図１】本発明一実施例移動通信システムのブロック構
成図。FIG. 1 is a block configuration diagram of a mobile communication system according to an embodiment of the present invention.
【図２】本発明他の実施例移動通信システムのブロック
構成図。FIG. 2 is a block diagram of a mobile communication system according to another embodiment of the present invention.
【図３】本発明他の実施例移動通信システムの時分割複
信信号のタイミングチャート。FIG. 3 is a timing chart of a time division duplex signal of a mobile communication system according to another embodiment of the present invention.
【図４】本発明他の実施例移動通信システムの切替手段
のブロック構成図。FIG. 4 is a block diagram of a switching means of a mobile communication system according to another embodiment of the present invention.
【図５】従来例の移動通信システムのブロック構成図。FIG. 5 is a block configuration diagram of a conventional mobile communication system.
１０Ａ〜１０Ｃ 基地局 １１Ａ〜１１Ｃ 送受信機 １２ 送信増幅器 １３ 受信増幅器 １４Ａ、１４Ｂ 切替手段 １５ アンテナ １６ スイッチ １７ 折返回路 １８、２３ 試験用送受信機 ２０Ａ〜２０Ｃ 集中局 ２１ 接続手段 ２２ 無線変復調器 ２４ 試験用電話機 ２５ 回線選択装置 ２６ 通話試験用電話機 ３０ 伝送路 ４０ 移動局 Ｒ1 〜Ｒn 集中局の受信タイムスロット Ｓ1 〜Ｓn 集中局の送信タイムスロット Ｔ 時分割複信信号の１／２周期 ｔ 伝送路における遅延時間10A to 10C Base station 11A to 11C Transceiver 12 Transmitter amplifier 13 Receive amplifier 14A, 14B Switching means 15 Antenna 16 Switch 17 Folding circuit 18, 23 Test transceiver 20A-20C Central station 21 Connecting means 22 Wireless modem 24 Test 1/2 period t of the received time slots S 1 to S n transmit time slot T time division duplex signal toll phone 25 line selection device 26 for the call test phone 30 transmission path 40 mobile station R 1 to R n central station Delay time in transmission line
Claims (4)
が複数設けられ、この複数の基地局について一つ設けら
れた集中局と、この複数の基地局とこの一つの集中局と
を接続する双方向の伝送路とを備え、この一つの集中局
には各基地局に対応してこの伝送路と接続された複数の
無線変復調器が配置され、前記各基地局にはその伝送路
から到来する送信用無線周波数信号を増幅してアンテナ
に供給する送信増幅器およびこのアンテナの信号を増幅
して受信用無線周波数信号として前記伝送路に送出する
受信増幅器を備えた移動通信システムにおいて、 前記集中局に、試験用送受信機と、この試験用送受信機
を前記伝送路に接続する接続手段と、前記無線変復調器
の低周波側に接続する試験用電話機とを備え、 前記各基地局に、試験時には前記送信増幅器の出力を前
記受信増幅器の入力に折り返し接続する切替手段を備え
たことを特徴とする移動通信システム。1. A plurality of base stations are provided for performing two-way wireless communication with a mobile station, one central station provided for each of the plurality of base stations, and a plurality of the base stations and the one central station. A two-way transmission line to be connected, and a plurality of radio modulators / demodulators connected to this transmission line are arranged corresponding to each base station in this one central station, and the transmission line is connected to each base station. In a mobile communication system comprising a transmission amplifier that amplifies a transmission radio frequency signal coming from the antenna and supplies it to an antenna, and a reception amplifier that amplifies the signal of the antenna and sends it to the transmission path as a reception radio frequency signal, In the central station, a test transceiver, a connecting means for connecting the test transceiver to the transmission path, and a test telephone connected to the low frequency side of the radio modulator / demodulator, each of the base stations, At the time of testing Mobile communication system comprising the switching means for folding connecting the output of the signal amplifier to the input of the receive amplifier.
復調器の変調信号を復調入力に折り返す切換回路を備え
た請求項１記載の移動通信システム。2. The mobile communication system according to claim 1, wherein the connection means is provided with a switching circuit for returning the modulated signal of the radio modulator / demodulator to a demodulation input during a test.
信信号である請求項１または請求項２記載の移動通信シ
ステム。3. The mobile communication system according to claim 1, wherein the signal transmitted on the transmission path is a time division duplex signal.
送信タイムスロットおよびこの送信タイムスロットに続
くこれと同数の受信タイムスロットが所定の周期で繰り
返される信号であり、 前記切替手段は、前記集中局から到来する通話試験信号
の送信タイムスロットを前記時分割複信信号の周期の半
分の時間遅延して受信タイムスロットに変換する折返回
路と、前記送信増幅器からの通話試験信号をこの折返回
路に切り替えて前記受信用増幅器に接続するスイッチと
を含む請求項３記載の移動通信システム。4. The time-division duplex signal is a signal in which a plurality of continuous transmission time slots and the same number of reception time slots that follow this transmission time slot are repeated in a predetermined cycle, and the switching means is A loopback circuit for delaying a transmission time slot of a call test signal coming from a central station to a reception time slot by delaying a half of the cycle of the time division duplex signal, and a loopback circuit for a call test signal from the transmission amplifier. The mobile communication system according to claim 3, further comprising a switch that is switched to a switch and connected to the reception amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5214309A JPH0767170A (en) | 1993-08-30 | 1993-08-30 | Mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5214309A JPH0767170A (en) | 1993-08-30 | 1993-08-30 | Mobile communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0767170A true JPH0767170A (en) | 1995-03-10 |
Family
ID=16653615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5214309A Pending JPH0767170A (en) | 1993-08-30 | 1993-08-30 | Mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0767170A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100453485B1 (en) * | 1996-05-08 | 2005-01-17 | 애질런트 테크놀로지스, 인크. | Test device and test system to check route adjustment and fee record in mobile communication network |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62185424A (en) * | 1986-02-10 | 1987-08-13 | Matsushita Electric Ind Co Ltd | Digital line test equipment |
| JPS6346830A (en) * | 1986-08-15 | 1988-02-27 | Nec Corp | Radio channel controller with line loop back function |
| JPH02154536A (en) * | 1988-12-06 | 1990-06-13 | Nec Corp | Speech line test system |
-
1993
- 1993-08-30 JP JP5214309A patent/JPH0767170A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62185424A (en) * | 1986-02-10 | 1987-08-13 | Matsushita Electric Ind Co Ltd | Digital line test equipment |
| JPS6346830A (en) * | 1986-08-15 | 1988-02-27 | Nec Corp | Radio channel controller with line loop back function |
| JPH02154536A (en) * | 1988-12-06 | 1990-06-13 | Nec Corp | Speech line test system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100453485B1 (en) * | 1996-05-08 | 2005-01-17 | 애질런트 테크놀로지스, 인크. | Test device and test system to check route adjustment and fee record in mobile communication network |
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