JPH0342821B2 - - Google Patents
Info
- Publication number
- JPH0342821B2 JPH0342821B2 JP60145686A JP14568685A JPH0342821B2 JP H0342821 B2 JPH0342821 B2 JP H0342821B2 JP 60145686 A JP60145686 A JP 60145686A JP 14568685 A JP14568685 A JP 14568685A JP H0342821 B2 JPH0342821 B2 JP H0342821B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- control signal
- base station
- line
- radio
- 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 - Lifetime
Links
- 238000004891 communication Methods 0.000 claims description 15
- 230000011664 signaling Effects 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は信号中継方式に関し、更に詳細には、
マルチチヤネルアクセス方式による移動無線シス
テムにおける信号装置と基地局無線装置間の信号
中継方式に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a signal relay system, and more specifically,
The present invention relates to a signal relay method between a signaling device and a base station radio device in a mobile radio system using a multi-channel access method.
（従来の技術）
移動無線システムは、電波伝ぱんの性質上、基
地局を高所に設置する必要があり、山上に基地局
を設けることもしばしば行われている。山上に基
地局を設けた場合、通信所信号装置間の中継には
マルチチヤネルアクセス方式による移動無線シス
テムの場合、チヤネル容量を多く要することから
多重無線が一般に使用されている。(Prior Art) Mobile radio systems require base stations to be installed at high places due to the nature of radio wave propagation, and base stations are often installed on top of mountains. When a base station is installed on a mountain, multiplex radio is generally used for relaying between communication station signal devices because a mobile radio system using a multi-channel access method requires a large channel capacity.
一方、マルチチヤネルアクセス方式における信
号方式は、渡辺正信著「移動通信方式」科学新聞
社、P102−105に開示されるように、呼出チヤネ
ル方式、循環定位方式、循環不定位方式、空線待
機方式等の信号方式があるが、いずれも基地局か
ら移動局に対し、その回線が空いていることを示
す空線信号を、空いているチヤネルの一つまたは
複数に連続送出していることが特徴である。 On the other hand, the signaling systems in the multi-channel access system are the paging channel system, the cyclic localization system, the cyclic non-localization system, and the idle line standby system, as disclosed in Masanobu Watanabe, "Mobile Communication System," Kagaku Shinbunsha, p. 102-105. There are several signaling methods such as , but the feature of all of them is that the base station continuously sends out a blank line signal to the mobile station to indicate that the line is vacant, to one or more of the vacant channels. It is.
この連続信号を多重無線回線で伝送するために
は、伝送レベルは試験管レベルに対し過飽和を避
けるように約15dB低下させた値とする必要があ
る。15dB低下されて伝送された信号は、基地局
無線機の変調入力点で増幅、基準変調され移動局
に対し送信電波として発射される。通話路が形成
されてからの通信所から移動系への音声信号レベ
ルも上記信号レベルと同様に基地局変調入力点で
増幅されることから15dB低下した信号とする必
要がある。 In order to transmit this continuous signal over multiple radio lines, the transmission level needs to be about 15 dB lower than the test tube level to avoid oversaturation. The transmitted signal, which has been lowered by 15 dB, is amplified at the modulation input point of the base station radio, undergoes standard modulation, and is emitted as a transmission radio wave to the mobile station. The voice signal level from the communication station to the mobile system after the communication path is formed is also amplified at the base station modulation input point, similar to the above signal level, so it is necessary to lower the signal by 15 dB.
第２図は上記の事を鑑みて構成された従来方式
のブロツク図で、同図中は信号装置のインター
フエイス部であり、１は15dB低下させる減衰器、
は多重回線、は基地局無線機のインターフエ
イス部であり、２は15dB増幅器である。またａ
は変調入力信号端子、ｂは変調出力信号端子であ
る。 Figure 2 is a block diagram of a conventional system constructed in consideration of the above. In the figure, the interface part of the signal equipment is shown, and 1 is an attenuator that lowers the signal by 15 dB.
is the multiplex line, is the base station radio interface section, and 2 is the 15dB amplifier. Also a
b is a modulation input signal terminal, and b is a modulation output signal terminal.
（発明が解決しようとする問題点）
しかしながら、上記構成の従来方式では、通話
路が形成されたときの通信所より移動局に対する
音声Ｓ／Ｎが、基地局変調入力点ですでに多重無
線回線のチヤネルＳ／Ｎより15dB劣化する。特
に小容量多重回線等で回線条件によつてはチヤネ
ルＳ／Ｎが40dB程度のことは稀では無く、この
場合、変調入力Ｓ／Ｎは25dBとなつてしまう欠
点があつた。(Problems to be Solved by the Invention) However, in the conventional system with the above configuration, the voice S/N from the communication station to the mobile station when the communication path is formed is already the same as that of multiple radio channels at the base station modulation input point. The channel S/N is degraded by 15dB. In particular, it is not uncommon for the channel S/N to be about 40 dB depending on line conditions, such as in a small capacity multiplex line, and in this case, the modulation input S/N is 25 dB.
本発明は、以上述べた多重回線による中継回線
を形成したときのＳ／Ｎ劣化という従来技術の欠
点を除去し、良好な回線Ｓ／Ｎを得ることのでき
る信号中継方式を提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a signal relay system that can obtain a good line S/N ratio by eliminating the disadvantage of the conventional technology of S/N deterioration when a relay line is formed using multiple lines as described above. shall be.
（問題点を解決するための手段）
本発明は移動無線方式における信号装置と基地
局無線装置間を多重回線にて接続する信号中継方
式に係るもので、前記従来技術の問題点を解決す
るため、空線信号送出時には制御信号を付加送出
し、移動局との通話路形成時には制御信号の付加
送出を停止させる制御信号送出制御手段を信号装
置側に設け、付加送出されてきた制御信号を検出
する制御信号検出手段及び該制御信号検出手段の
出力に基づき変調レベルを変化させる変調レベル
修正手段を基地局無線装置側に設けて構成され
る。(Means for Solving the Problems) The present invention relates to a signal relay system that connects a signal device and a base station radio device in a mobile radio system using multiple lines, and aims to solve the problems of the prior art described above. , a control signal sending control means is provided on the signaling device side to additionally send out a control signal when sending out a vacant line signal, and to stop the additional sending of the control signal when forming a communication path with a mobile station, and detects the additionally sent control signal. The base station wireless device side is provided with a control signal detection means for detecting a control signal and a modulation level correction means for changing a modulation level based on the output of the control signal detection means.
（作用）
空線信号送出時すなわち空線状態時には信号装
置側に設けられた制御信号送出制御手段により空
線信号に制御信号が付加されて多重回線を介して
基地局無線装置側に送出される。一方、移動局と
の通話路形成時には制御信号送出制御手段は制御
信号の付加を行なわず、音声信号が多重回線を介
して基地局無線装置側に送出される。基地局無線
装置側に設けられた制御信号検出手段は信号装置
側から送られてきた制御信号の有無を検出し、そ
の出力を変調レベル修正手段に供給し、該手段は
例えば制御信号を受取つたときには変調レベルを
上昇させ、受取らなかつたときには変調レベルを
そのままとするように働く。(Function) When transmitting a vacant line signal, that is, in a vacant line state, a control signal is added to the vacant line signal by the control signal sending control means provided on the signaling device side, and the control signal is sent to the base station radio device side via multiple lines. . On the other hand, when forming a communication path with a mobile station, the control signal sending control means does not add a control signal, and the voice signal is sent to the base station radio equipment side via a multiplex line. The control signal detection means provided on the base station radio equipment side detects the presence or absence of a control signal sent from the signaling equipment side, and supplies its output to the modulation level correction means, which receives the control signal, for example. Sometimes it works to increase the modulation level, and when it does not receive it, it works to keep the modulation level as it is.
（実施例）
第１図は本発明の実施例を示すブロツク図であ
つて、は信号装置の多重回線インターフエイス
部、は多重回線、は基地局無線装置の多重回
線インターフエイス部である。において、ａは
変調入力信号端子、ｃは通話路成立信号端子、３
は混合増幅器、４は通話路成立信号により切断制
御されるスイツチ回路、５は制御信号発生器であ
る。において、６は制御信号成分除去ろ波器、
７は低周波増幅器、８は制御信号検出器、９はろ
波器６の出力と増幅器７の出力を制御信号検出器
８の制御検出信号により切換えるスイツチ回路、
ｂは基地局送信機用変調出力信号端子である。な
お、このブロツク図は、マルチチヤネルのうち１
つのチヤネルについて図示している。(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention, in which is a multiple line interface section of a signaling device, 1 is a multiple line, and 1 is a multiple line interface section of a base station radio device. , a is a modulation input signal terminal, c is a communication path establishment signal terminal, and 3
4 is a mixing amplifier, 4 is a switch circuit which is controlled to be disconnected by a communication path establishment signal, and 5 is a control signal generator. , 6 is a control signal component removal filter;
7 is a low frequency amplifier; 8 is a control signal detector; 9 is a switch circuit that switches the output of the filter 6 and the output of the amplifier 7 in accordance with the control detection signal of the control signal detector 8;
b is a modulated output signal terminal for the base station transmitter. Note that this block diagram shows only one of the multichannels.
Two channels are illustrated.
動作について説明すると、先ず、空線状態時、
信号装置からの空線信号は端子“ａ”に加わり、
混合増幅器３を通り多重回線へ出力される。ま
た、信号装置より通話路成立信号が“ｃ”へ加わ
つていないので制御信号発生器５よりの信号は、
スイツチ回路４を通り混合増幅器３にて混合さ
れ、空線信号と共に多重回線へ出力される。こ
こで、制御信号は空線信号と異なる信号とし、無
線回線の帯域（300Hz〜3000Hz）外で、多重回線
の帯域（300Hz〜3400Hz）内の例えば3300Hz等と
する。また、信号レベルは、空線信号、制御信号
共に連続信号であり、多重回線への出力レベルを
基準レベル以下15dB（−15dBo）とするため、お
のおの−18dBoとする。この信号は多重回線を
通りインターフエイス部へ加わる。そして、先
ず、制御信号除去ろ波器６で制御信号成分のみが
除去され、増幅器７で18dB増幅され、スイツチ
回路９へ加えられる。一方、制御信号は検出器８
で検出され、スイツチ回路９へ切替出力が加わ
り、増幅器７の出力を端子“ｂ”へ出力し無線機
の変調信号として基準変調され移動局へ発射され
る。 To explain the operation, first, when the line is empty,
The blank wire signal from the signaling device is applied to terminal “a”;
The signal passes through the mixing amplifier 3 and is output to the multiplex line. Also, since the communication path establishment signal from the signaling device is not added to "c", the signal from the control signal generator 5 is as follows.
The signals pass through the switch circuit 4, are mixed by the mixing amplifier 3, and are output to the multiplex line together with the blank line signal. Here, the control signal is a signal different from the idle line signal, and is outside the radio line band (300 Hz to 3000 Hz) and is within the multiplex line band (300 Hz to 3400 Hz), such as 3300 Hz. Further, the signal level is set to -18 dBo for both the blank line signal and the control signal, which are continuous signals, so that the output level to the multiplex line is 15 dB (-15 dBo) below the reference level. This signal passes through multiple lines and is applied to the interface section. First, only the control signal component is removed by the control signal removal filter 6, amplified by 18 dB by the amplifier 7, and applied to the switch circuit 9. On the other hand, the control signal is transmitted to the detector 8
, a switching output is applied to the switch circuit 9, and the output of the amplifier 7 is outputted to the terminal "b", where it is reference modulated as a radio modulation signal and is transmitted to the mobile station.
つぎに移動局との通話路が形成された場合につ
いて説明する。通話路が形成されると信号装置よ
り端子“ｃ”に通話路成立信号が加えられ、スイ
ツチ回路４が断となり、制御信号の送出が停止す
る。また、端子“ａ”には空線信号に代り音声信
号が加えられることになるが、このレベルは多重
回線への送出時0dBmoで送出するよう構成す
る。すなわち空線信号レベルに比し18dBだけ基
準レベルを上げて送出することになる。 Next, a case where a communication path with a mobile station is formed will be explained. When the communication path is established, a communication path establishment signal is applied to the terminal "c" from the signaling device, the switch circuit 4 is disconnected, and the transmission of the control signal is stopped. Furthermore, an audio signal is applied to the terminal "a" instead of the idle line signal, and the configuration is such that this level is 0 dBmo when sent to the multiplex line. In other words, the reference level is raised by 18 dB compared to the empty line signal level and then transmitted.
基地局無線装置インターフエイス部では制御
信号の停止によりスイツチ回路９への制御出力が
無くなり、ろ波器６の出力は増幅器７を通らずに
端子ｂへ接続され、基地局無接機の変調信号とし
て基準変調され移動局へ発射される。 In the base station radio equipment interface section, the control signal is stopped and the control output to the switch circuit 9 disappears, and the output of the filter 6 is connected to terminal b without passing through the amplifier 7, and the modulated signal of the base station wireless equipment is The signal is modulated as a standard and transmitted to the mobile station.
したがつて、上記実施例によれば、音声信号に
対して多重回線本来のＳ／Ｎ以下にＳ／Ｎは劣化
しないでかつ空線信号送出時のみ信号レベルを低
下させることができる。 Therefore, according to the above embodiment, the S/N of the audio signal does not deteriorate below the original S/N of the multiplex line, and the signal level can be lowered only when transmitting the blank line signal.
（発明の効果）
以上説明したように、本発明によれば、通話路
が形成されたとき基地局無線機の変調入力増幅利
得を低下させ、音声の送出レベルを基準レベル
（0dBmo）まで上昇させることにより、多重回線
でのＳ／Ｎ劣化が無く良好なＳ／Ｎにて移動局へ
送信できる利点がある。(Effects of the Invention) As explained above, according to the present invention, when a communication path is formed, the modulation input amplification gain of the base station radio is reduced and the audio transmission level is increased to the reference level (0 dBmo). This has the advantage of being able to transmit to the mobile station with a good S/N ratio without S/N deterioration due to multiple channels.
第１図は本発明の一実施例の構成を示すブロツ
ク図、第２図は従来の信号中継方式の構成を示す
ブロツク図である。
１……減衰器、２……増幅器、３……混合増幅
器、４……スイツチ回路、５……制御信号発生
器、６……制御信号除去ろ波器、７……増幅器、
８……制御信号検出器、９……スイツチ回路。
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional signal relay system. DESCRIPTION OF SYMBOLS 1... Attenuator, 2... Amplifier, 3... Mixing amplifier, 4... Switch circuit, 5... Control signal generator, 6... Control signal removal filter, 7... Amplifier,
8...Control signal detector, 9...Switch circuit.
Claims (1)
装置間を多重回線にて接続する信号中継方式にお
いて、 前記信号装置側に、空線信号送出時には制御信
号を付加送出し、移動局との通話路形成時には制
御信号の付加送出を停止させる制御信号送出制御
手段を設けるとともに、 前記基地局無線装置側に、付加送出されてきた
制御信号を検出する制御信号検出手段と、該制御
信号検出手段の出力に基づき変調レベルを変化さ
せる手段とを設けたことを特徴とする信号中継方
式。[Scope of Claims] 1. In a signal relay system that connects a signaling device and a base station radio device in a mobile radio system via multiple lines, the signaling device side additionally sends out a control signal when sending out an idle signal, and A control signal sending control means for stopping the additional sending of the control signal when forming a communication path with the base station is provided, and a control signal detecting means for detecting the additionally sent control signal on the side of the base station radio equipment; 1. A signal relay system comprising: means for changing a modulation level based on the output of the signal detecting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60145686A JPS627231A (en) | 1985-07-04 | 1985-07-04 | Signal relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60145686A JPS627231A (en) | 1985-07-04 | 1985-07-04 | Signal relay system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS627231A JPS627231A (en) | 1987-01-14 |
| JPH0342821B2 true JPH0342821B2 (en) | 1991-06-28 |
Family
ID=15390744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60145686A Granted JPS627231A (en) | 1985-07-04 | 1985-07-04 | Signal relay system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS627231A (en) |
-
1985
- 1985-07-04 JP JP60145686A patent/JPS627231A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS627231A (en) | 1987-01-14 |
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