JP2562965B2 - Closed wired communication device - Google Patents
Closed wired communication deviceInfo
- Publication number
- JP2562965B2 JP2562965B2 JP1144047A JP14404789A JP2562965B2 JP 2562965 B2 JP2562965 B2 JP 2562965B2 JP 1144047 A JP1144047 A JP 1144047A JP 14404789 A JP14404789 A JP 14404789A JP 2562965 B2 JP2562965 B2 JP 2562965B2
- Authority
- JP
- Japan
- Prior art keywords
- line
- signal
- communication
- terminal device
- call
- 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
- 230000005540 biological transmission Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明はCATVやテレビ共聴網等同軸線等構成した有線
通信システムなどの映像系で使用していない空きチャン
ネルを使用した通信装置に関するものである。Description: TECHNICAL FIELD The present invention relates to a communication device using an empty channel which is not used in a video system such as a cable communication system having a coaxial line such as a CATV or a television common listening network. Is.
(従来の技術) 従来、この種の有線通信システムは1台のセンター装
置と複数個の端末装置で構成している端末装置相互間の
通信を制御する回線交換機能を有するセンター装置の回
線割り付け制御に従い、センター装置が指定する回線を
用いて端末装置相互間の通信を行っていた。(Prior Art) Conventionally, a wired communication system of this type has a line allocation control of a center device having a line switching function for controlling communication between terminal devices composed of one center device and a plurality of terminal devices. In accordance with this, communication between terminal devices was performed using the line designated by the center device.
通話時、端末装置には1個の回線が割り付けられてい
て端末装置が相互通信を行うときはセンター装置に対応
する端末装置との回線の接続を依頼し、回線確立後通信
を行う。At the time of a call, one line is allocated to the terminal device, and when the terminal devices perform mutual communication, the center device is requested to connect the line with the corresponding terminal device, and communication is performed after the line is established.
通信が完了すると端末装置は送信を停止しセンター装
置が終話を検知していた。When the communication was completed, the terminal device stopped transmission and the center device detected the end of the call.
(発明が解決しようとする課題) 上記従来の閉域通信装置では1つの端末装置が通話の
完了を報告するために通信回線を使用し、通話路のトラ
フィックは通話量が増えると2倍に増える。そのため回
線の利用効率が悪化する欠点があった。(Problem to be Solved by the Invention) In the above-mentioned conventional closed area communication device, one terminal device uses a communication line to report the completion of a call, and the traffic on the call path doubles as the call volume increases. Therefore, there is a drawback that the utilization efficiency of the line deteriorates.
本発明の目的は、従来の欠点を解消し、回線のノイズ
に強く、端末装置相互間の通信が完了すると、センター
装置が直ちに終話を検知でき、回線の利用効率が向上す
る閉域有線通信装置を提供することである。An object of the present invention is to eliminate the drawbacks of the related art, tolerate line noise, and when the communication between terminal devices is completed, the center device can immediately detect the end of call and the line utilization efficiency is improved. Is to provide.
(課題を解決するための手段) 本発明の閉域有線通信装置は、センター装置からの回
線使用許可を受けて端末装置相互間で指示された回線で
通信するシステムで、センター装置が端末装置相互間の
通信の終了を判定するために、センター装置は当該端末
装置が通信に使用している通信回線の信号レベルを常時
監視し、信号レベルが一定値以下のときに終話と判定し
て、回線のトラフィックを上げずに終話を検知する機能
を有するものである。(Means for Solving the Problem) A closed wired communication device according to the present invention is a system in which a terminal device permits communication between terminals by receiving a line use permission from the center device and communicating with each other by a specified line. In order to determine the end of communication, the center device constantly monitors the signal level of the communication line used by the terminal device for communication, determines that the call is terminated when the signal level is below a certain value, and It has the function of detecting the end of the call without raising the traffic of.
(作 用) 本発明は、上記構成により端末装置から終話報告を受
けるため、回線の使用頻度を上げ効率をよくするもので
ある。(Operation) Since the present invention receives the call termination report from the terminal device with the above-described configuration, the frequency of use of the line is increased and the efficiency is improved.
(実施例) 本発明の一実施例を第1図ないし第5図に基づいて説
明する。(Embodiment) An embodiment of the present invention will be described with reference to FIGS.
第1図は本発明の閉域有線通信装置の構成を示すブロ
ック図である。同図において、11はセンター装置、12は
同軸線等で構成された伝送媒体、13,14,15,16は端末装
置であり、員数の増加は可能である。FIG. 1 is a block diagram showing the configuration of a closed area wired communication device of the present invention. In the figure, 11 is a center device, 12 is a transmission medium composed of a coaxial line, and 13, 14, 15, and 16 are terminal devices, and the number of members can be increased.
第2図は端末装置の構成を示すブロック図であり、21
は分岐器、22はマイクロプロセッサー、23は受信用シン
セサイザー、24は送信用シンセサイザーであり、25はア
ナログ/ディジタル変換器である。FIG. 2 is a block diagram showing the configuration of the terminal device.
Is a branching device, 22 is a microprocessor, 23 is a receiving synthesizer, 24 is a transmitting synthesizer, and 25 is an analog / digital converter.
第3図はセンター装置の構成を示すブロック図で、30
1は分岐器、302は信号分離器、303は混合器、304は混合
信号発生器、305は合成器、306は結合器、307は受信用
シンセサイザー、308はアナログ/ディジタル変換器、3
09は回線監視部、310は回線制御部であり、311は送信用
シンセサイザーである。FIG. 3 is a block diagram showing the configuration of the center device.
1 is a splitter, 302 is a signal separator, 303 is a mixer, 304 is a mixed signal generator, 305 is a combiner, 306 is a combiner, 307 is a receiving synthesizer, 308 is an analog / digital converter, 3
Reference numeral 09 is a line monitoring unit, 310 is a line control unit, and 311 is a synthesizer for transmission.
第4図は受信信号レベルの区分を示す図であり、41は
受信信号がないときのレベル、42は受信信号があるとき
のレベル、43は受信信号がないと判定する信号域、44は
判定できない信号域であり、45は受信信号があると判定
する信号域である。FIG. 4 is a diagram showing the division of the received signal level, 41 is a level when there is no received signal, 42 is a level when there is a received signal, 43 is a signal range in which it is judged that there is no received signal, and 44 is a judgment This is a signal range that cannot be received, and 45 is a signal range in which it is determined that there is a received signal.
第5図は判定のための比較表であり、51は判定テーブ
ルである。FIG. 5 is a comparison table for judgment, and 51 is a judgment table.
次に動作について説明する。 Next, the operation will be described.
(1)端末装置13が端末装置14と通信を行うときは、端
末装置13はセンター装置11に伝送媒体12の連絡用回線を
経由して連絡し、通話回線の割り付けを求める。(1) When the terminal device 13 communicates with the terminal device 14, the terminal device 13 contacts the center device 11 via the communication line of the transmission medium 12 and requests the allocation of the communication line.
(2)センター装置は伝送媒体12経由の信号を受信用シ
ンセサイザー307で抽出して回線制御部310で解析する。
そして回線の使用状況を判断して送信用シンセサイザー
311で生成し、合成器305を経由して回線割り付け信号を
伝送媒体12に出力する。(2) The center apparatus extracts the signal via the transmission medium 12 by the receiving synthesizer 307 and analyzes it by the line control unit 310.
Then, determine the usage status of the line and synthesize the transmitter.
The line allocation signal generated in 311 is output to the transmission medium 12 via the combiner 305.
(3)端末装置13と端末装置14は指示された通信回線を
用いて通信を行う。(3) The terminal device 13 and the terminal device 14 communicate with each other using the designated communication line.
(4)端末装置13が発した信号は端末装置13内で送信用
シンセサイザー24から分岐器21を経由して、伝送媒体12
を通り、センター装置11内部に取り込まれる。(4) The signal generated by the terminal device 13 is transmitted from the transmission synthesizer 24 in the terminal device 13 through the branching device 21 to the transmission medium 12
And is taken into the center device 11.
(5)センター装置11の分岐器301で取り込まれた信号
分岐器302で分離された上り信号は混合器303で混合信号
発生器304の発生する信号と混合され、下り帯域の信号
に変換される。さらに合成器305でセンター装置11の回
線制御信号と多階化され、結合器306で伝送媒体12へ送
られる。(5) The upstream signal separated by the signal splitter 302 taken in by the splitter 301 of the center device 11 is mixed with the signal generated by the mixed signal generator 304 by the mixer 303 and converted into a signal in the downstream band. . Further, it is multi-layered with the line control signal of the center apparatus 11 by the combiner 305 and sent to the transmission medium 12 by the combiner 306.
(6)端末装置14に取り込まれた信号は分岐器21で送信
と受信に分れる。受信信号は分岐器21から受信用シンセ
サイザー23へ送られ、複合化されてマイクロプロセッサ
ー22へ送られて解析される。マイクロプロセッサー22は
受信用シンセサイザー23に受信チャンネルを、送信用シ
ンセサイザー24に送信チャンネルを指示する。受信用シ
ンセサイザー23は指示されたチャンネルを用いてオーデ
ィオプロセッサー等で音声化して通信する。(6) The signal taken in by the terminal device 14 is divided into transmission and reception by the branching device 21. The received signal is sent from the branching device 21 to the receiving synthesizer 23, is composited, and is sent to the microprocessor 22 for analysis. The microprocessor 22 instructs the receiving synthesizer 23 to specify the receiving channel and the transmitting synthesizer 24 to specify the transmitting channel. The receiving synthesizer 23 uses the designated channel to convert the voice into an audio signal using an audio processor or the like and communicate with the audio signal.
(7)センター装置は回線の割り付けが完了すると受信
用シンセサイザー307を端末装置13と端末装置14が使用
しているチャンネルに設定して信号のレベルを測定し、
信号が低下したことを判定して、終話を検知する。(7) When the line allocation is completed, the center device sets the receiving synthesizer 307 to the channel used by the terminal device 13 and the terminal device 14, and measures the signal level,
The end of the call is detected by determining that the signal has dropped.
このように、本発明によれば、端末装置13が通信を完
了すると直ちにセンター装置11が検知し、回線のトラフ
ィックは上がらない。As described above, according to the present invention, as soon as the terminal device 13 completes the communication, the center device 11 detects the communication, and the line traffic does not increase.
(8)さらに、システムの起動時に受信信号のレベルを
測定して、その値を一時記憶する。(8) Furthermore, the level of the received signal is measured when the system is started, and the value is temporarily stored.
(9)その値に基づき、受信した信号を第4図に従い分
類する。43は信号なし、44は不定、45は信号ありであ
る。(9) Based on the value, the received signal is classified according to FIG. 43 is no signal, 44 is indefinite, 45 is signal.
(10)回線監視部309はアナログ/ディジタル変換器308
に対して電圧値を連続5階測定し、それぞれを、E1,E2,
E3,E4,E5とする。(10) The line monitoring unit 309 is an analog / digital converter 308
The voltage value is continuously measured on the fifth floor with respect to E 1 , E 2 ,
E 3 , E 4 , E 5
(11)信号あり45をH,不定44をM,信号なし43をLとして
E1,E2,E3に関して、以下の分類をする。(11) 45 with signal is H, undefined 44 is M, and 43 without signal is L
The following classification is made for E 1 , E 2 , and E 3 .
*1 すべてがH45のときは信号ありと判定する。* 1 Judge that there is a signal when all are H45.
*2 すべてがL43のときは信号なしと判定する。* 2 When all are L43, it is judged that there is no signal.
*3 2個がH45で1個がM44のときは信号ありとする *4 2個がL43で1個がM44のときは信号なしとする。* 3 There is a signal when two are H45 and one is M44. * 4 There is no signal when two are L43 and one is M44.
(12)(11)で判定できないときは、E3,E4,E5に対して
判定する。(12) (11) If you can not determine, it is determined with respect to E 3, E 4, E 5 .
(13)(12)で判定できないときは、一定時間後に再測
定をし判定する。(13) If it is not possible to make a judgment in (12), make a measurement again after a certain period of time and make a judgment.
第5図に示す判定テーブル51の分類をすることは、上
記の判定と同一であり、マイクロプロセッサーで容易に
実現できる。The classification of the judgment table 51 shown in FIG. 5 is the same as the above judgment, and can be easily realized by a microprocessor.
(発明の効果) 本発明によれば、端末装置相互間の通信が完了すると
センター装置が直ちに終話を検知でき、また回線のトラ
フィックを上げずに、この機能が実現でき、また回線ノ
イズに強く、さらに低価格で上記の機能を実現でき、そ
の実用上の効果は大である。(Effects of the Invention) According to the present invention, when the communication between terminal devices is completed, the center device can immediately detect the end of call, and this function can be realized without increasing the traffic of the line, and is resistant to line noise. The above function can be realized at a lower price, and its practical effect is great.
第1図は本発明の一実施例における閉域有線通信装置の
システム構成のブロック図、第2図は同端末装置の構成
ブロック図、第3図は同センター装置の構成ブロック
図、第4図は信号の区分を示す図、第5図は判定のため
の比較表である。 11……センター装置、12……伝送媒体、13,14,15,16…
…端末装置、21,301……分岐器、22……マイクロプロセ
ッサー、23,307……受信用シンセサイザー、24,311……
送信用シンセサイザー、25,308……アナログ/ディジタ
ル変換器、26……回線上の信号、27……音声出力、28…
…音声入力、302……信号分離器、303……混合器、304
……混合信号発生器、305……合成器、306……結合器、
309……回線監視部、310……回線制御部、41……受信信
号がないときのレベル、42……受信信号があるときのレ
ベル、43……受信信号がないと判定する信号域、44……
判定できない信号域、45……受信信号があると判定する
信号域、51……判定テーブル。FIG. 1 is a block diagram of a system configuration of a closed area wired communication device according to an embodiment of the present invention, FIG. 2 is a configuration block diagram of the terminal device, FIG. 3 is a configuration block diagram of the center device, and FIG. FIG. 5 is a diagram showing signal divisions and FIG. 5 is a comparison table for determination. 11 ... Center device, 12 ... Transmission medium, 13,14,15,16 ...
… Terminal device, 21,301 …… Switch, 22 …… Microprocessor, 23,307 …… Receive synthesizer, 24,311 ……
Synthesizer for transmission, 25,308 ... Analog / digital converter, 26 ... Signal on line, 27 ... Speech output, 28 ...
… Voice input, 302 …… Signal separator, 303 …… Mixer, 304
...... Mixed signal generator, 305 …… Combiner, 306 …… Coupler,
309 ...... Line monitoring unit, 310 ...... Line control unit, 41 ...... Level when there is no received signal, 42 ...... Level when there is a received signal, 43 ...... Signal area for judging that there is no received signal, 44 ......
Signal area that cannot be determined, 45 ... Signal area that determines that there is a received signal, 51 ... Judgment table.
Claims (1)
端末装置相互間で指示された回線で通信するシステム
で、前記センター装置が前記端末装置相互間の通信の終
了を判定するために、前記センター装置は当該端末装置
が通信に使用している通信回線の信号レベルを常時監視
し、前記信号レベルが一定値以下のときに終話と判定し
て、前記回線のトラフィックを上げずに終話を検知する
機能を有することを特徴とする閉域有線通信装置。1. A system in which a terminal device is permitted to use a line to communicate with each other via a line instructed between the terminal devices, wherein the center device determines the end of communication between the terminal devices. The center device constantly monitors the signal level of the communication line used for communication by the terminal device, determines that the call is terminated when the signal level is below a certain value, and terminates the call without increasing the traffic of the line. A closed area wired communication device having a function of detecting
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1144047A JP2562965B2 (en) | 1989-06-08 | 1989-06-08 | Closed wired communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1144047A JP2562965B2 (en) | 1989-06-08 | 1989-06-08 | Closed wired communication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0310553A JPH0310553A (en) | 1991-01-18 |
| JP2562965B2 true JP2562965B2 (en) | 1996-12-11 |
Family
ID=15353087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1144047A Expired - Lifetime JP2562965B2 (en) | 1989-06-08 | 1989-06-08 | Closed wired communication device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2562965B2 (en) |
-
1989
- 1989-06-08 JP JP1144047A patent/JP2562965B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0310553A (en) | 1991-01-18 |
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