JPH0340535A - Isdn terminal equipment connecting system - Google Patents
Isdn terminal equipment connecting systemInfo
- Publication number
- JPH0340535A JPH0340535A JP1176530A JP17653089A JPH0340535A JP H0340535 A JPH0340535 A JP H0340535A JP 1176530 A JP1176530 A JP 1176530A JP 17653089 A JP17653089 A JP 17653089A JP H0340535 A JPH0340535 A JP H0340535A
- Authority
- JP
- Japan
- Prior art keywords
- isdn terminal
- control channel
- channel information
- equipment
- terminal device
- 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
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000001228 spectrum Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 108010076504 Protein Sorting Signals Proteins 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000001934 delay Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Landscapes
- Small-Scale Networks (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はI 5DNfl末装置接続方式に関し、持に網
終端装置とI SDN端末装置との間の伝送路を無線回
線としたI SDN端末装置接続方式に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an I5DN fl terminal device connection system, and specifically relates to an ISDN terminal device in which the transmission path between a network termination device and an ISDN terminal device is a wireless line. Regarding the connection method.
従来、網終端装置とI SDN端末装置の接続方式とし
ては、伝送路に有線回線を前提とする各種の方式が提案
され、実用に供されている。しかし伝送路を無線回線と
する場合の接続方式としては、特に定められた・ものは
無い。又、現在提案されている、伝送路として有線回線
を前提とする各種の方式を、そのまま無線回線に適用す
るこヒには無理があり、特にI SDN端末端末装置間
時発呼等の衝突に対する対策が必要である。Conventionally, as a connection method between a network termination device and an ISDN terminal device, various methods that assume a wired line as a transmission path have been proposed and put into practical use. However, there is no particular connection method established when the transmission path is a wireless line. Furthermore, it is impossible to apply the various methods that are currently being proposed that assume wired lines as transmission paths to wireless lines, and it is especially difficult to apply them to wireless lines, especially when it comes to collisions such as when calls are made between ISDN terminals. Measures are necessary.
上述した従来のI SDN端末装置接続方式は、伝送路
を無線回線とする場合の接続方式としては、特に定めら
れたものは無く、又、適当な接続方式も無いという問題
点がある。The above-mentioned conventional ISDN terminal device connection system has the problem that there is no particular connection system established when the transmission path is a wireless line, and there is no suitable connection system.
本発明の目的は、網終端装置とI SDN端末装置との
間の伝送路を無線回線としても、有線回線と同等の接続
を可能とするI SDN端末装置接続方式を提供するこ
とにある。An object of the present invention is to provide an ISDN terminal device connection system that allows a connection equivalent to a wired line even if the transmission path between a network termination device and an ISDN terminal device is a wireless line.
本発明のI SDN端末装置接続方式は、網終端装置と
一台以上のI SDN端末装置との間の伝送路を無線回
線とし、前記網終端装置は受信信号に含まれる制御チャ
ネル情報を取出す機能を備えるスペクトル拡散方式受信
機と、前記取出した制御チャネル情報を送出する制御情
報に含ませる機能を備える位相変調方式または周波数変
調方式送信機とを備え、前記I SDN端末装置は位相
変調方式または周波数変調方式受信機とスペクトル拡散
方式送信機ど前記網終端装置から受信した前記制御情報
に含まれる制御チャネル情報を自己の送出した制御チャ
ネル情報と同一であるか否かを判定する比較検出回路と
を備えて構成されている。The ISDN terminal device connection method of the present invention uses a wireless line as a transmission path between a network termination device and one or more ISDN terminal devices, and the network termination device has a function of extracting control channel information included in a received signal. and a phase modulation method or frequency modulation method transmitter having a function of including the extracted control channel information in the control information to be transmitted, and the I SDN terminal device A comparison detection circuit that determines whether control channel information included in the control information received from the network terminal device, such as a modulation method receiver and a spread spectrum transmitter, is the same as the control channel information transmitted by itself. Configured with the necessary features.
〔実施例〕
次に、本発明の実施例について図面を参照して説明する
。[Example] Next, an example of the present invention will be described with reference to the drawings.
第1図は本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
I SDN端末装置1およびI SDN端末装置2は、
それぞれスペクトル拡散方式送信機3,4と、位相変調
方式または周波数変調方式受信機5.6と、データ端末
装置としての動作を制御するデータ制御部7.8と、ス
ペクトル拡散方式送信機3゜4の送信信号の中から自己
の送出した制御チャネル情報を取出し一定時間遅延させ
て出力する遅延回路9.10と、位相変調方式または周
波数変調方式受信機5.6の受信信号の中から制御チャ
ネル情報を取出し遅延回路9.10の出力と比較し受信
したものが自己の送出した制御チャネル情報と同一であ
るか否かを判定する比較検出回路11゜12とを備えて
いる。The I SDN terminal device 1 and the I SDN terminal device 2 are
Spread spectrum transmitters 3 and 4, a phase modulation or frequency modulation receiver 5.6, a data control section 7.8 that controls operation as a data terminal device, and a spread spectrum transmitter 3.4, respectively. A delay circuit 9.10 extracts the control channel information sent by itself from the transmitted signal, delays it for a certain period of time, and outputs it, and a phase modulation type or frequency modulation type receiver 5.6 extracts control channel information from the received signal of the receiver 5.6. Comparison and detection circuits 11 and 12 are provided for comparing the output of the output delay circuit 9 and the output of the delay circuit 9 and 10 to determine whether or not the received information is the same as the control channel information transmitted by itself.
網終端装置13は、受信信号に含まれる制御チャネル情
報を取出す機能を備えるスペクトル拡散方式受信機14
と、その取出した制御チャネル情報を、I SDN端末
装置1,2に送出する制御情報に含ませる機能を備える
位相変調方式または周波数変調方式送信機15と、網終
端装置としての動作を制御する網終端制御部16とを備
えている。The network terminal device 13 includes a spread spectrum receiver 14 having a function of extracting control channel information included in the received signal.
, a phase modulation type or frequency modulation type transmitter 15 having a function of including the extracted control channel information in the control information sent to the ISDN terminal devices 1 and 2, and a network device that controls the operation as a network terminal device. A termination control section 16 is provided.
次に、動作について説明する。Next, the operation will be explained.
今、発呼しようとするI SDN端末装置1は、遅延回
路9の出力が空線信号であることを検出した後、送信信
号をスペクトル拡散方式送信機3から送出する。その後
、比較検出回路11の出力を監視し、自己の送出した信
号と一致した場合にのみ継続して次のデータを送信し、
不一致の場合は送信を停止し、再び空線信号を受信する
まで待ち合せる。これによりI SDN端末装置の同時
発呼等による衝突が回避できる。The ISDN terminal device 1 that is about to make a call now sends out a transmission signal from the spread spectrum transmitter 3 after detecting that the output of the delay circuit 9 is a blank line signal. After that, the output of the comparison detection circuit 11 is monitored, and only when it matches the signal sent by itself, continues to transmit the next data,
If there is a mismatch, transmission is stopped and waits until a blank line signal is received again. This makes it possible to avoid collisions caused by ISDN terminals making simultaneous calls, etc.
次に、自己の送出した信号の照合について第2図を参照
して説明する。Next, verification of the signals sent by itself will be explained with reference to FIG. 2.
第2図は網終端装置13とI SDN端末装置1および
I SDN端末装置2との間の信号の授受を示す信号シ
ーケンス図である。FIG. 2 is a signal sequence diagram showing the transmission and reception of signals between the network termination device 13 and the ISDN terminal devices 1 and 2. In FIG.
すべてのI SDN端末装置のスベクI・ル拡散方式送
信機は、同一の生成多項式を有する巡回型擬似ランダム
系列のパターン発生回路を有し、同期は網終端装置から
の空線信号17の信号受信時点を基準18とし、各I
SDN端末装置ごとに決められた時間差19.20を持
たせて制御チャネル情報21の送出を行う方式とする。All I SDN terminal equipment's SUBEC I-LE spreading method transmitters have a cyclic pseudo-random sequence pattern generation circuit having the same generating polynomial, and are synchronized with the signal reception of the idle signal 17 from the network termination equipment. The time point is set as reference 18, and each I
The system is such that control channel information 21 is transmitted with a time difference of 19.20 determined for each SDN terminal device.
網終端装置のスペクトル拡散方式受信機は、I SDN
端末装置の送信機と同一の生成多項式を有する巡回型擬
似ランダム系列のパターン発生回路を有し、同期は網終
端装置が送信してからそれに同期してl5DN端末装置
が送信する制御チャネル情報21を、受信するまでのル
ープ遅延時間22を基準とし、前述のI SDN端末装
置ごとに決められた時間差19.20をもって復調を行
う。網終端装置は各I SDN端末装置の送信を検出す
るまでは周期的に順次復調するまでの時間差を変化させ
、信号を検出した時点でその時間差を固定し、同−l5
DN端末装置からの信号を継続して復号化し、受信する
。The spread spectrum receiver of the network termination equipment is an ISDN
It has a pattern generation circuit for a cyclic pseudo-random sequence having the same generating polynomial as the transmitter of the terminal device, and synchronization is performed by transmitting control channel information 21 from the network terminal device and then synchronizing it with the control channel information 21 transmitted by the I5DN terminal device. , demodulation is performed with a time difference of 19.20 determined for each ISDN terminal device described above, based on the loop delay time 22 until reception. The network terminal device periodically changes the time difference until it sequentially demodulates the signal until it detects the transmission from each ISDN terminal device, fixes the time difference when it detects the signal, and then
Continuously decode and receive signals from the DN terminal equipment.
網終端装置の送信信号には、I SDN端末装置から受
信した制御チャネル情報21が、折返し情報として含ま
れている。第2図では、I SDN端末装置1の制御チ
ャネル情報21をAI、A2゜A3、I SDN端末装
置2の制御チャネル情報21をB1として区別して表示
している。すべてのI SDN端末装置が送信していな
いときは、この折返し情報は空線信号17となっている
。The transmission signal from the network terminal equipment includes control channel information 21 received from the ISDN terminal equipment as return information. In FIG. 2, the control channel information 21 of the ISDN terminal device 1 is shown as AI, A2°A3, and the control channel information 21 of the ISDN terminal device 2 is shown as B1. When all ISDN terminal devices are not transmitting, this return information is a blank line signal 17.
このように、網終端装置13の送信信号に前置された制
御チャネル情報21を確認することにより、各I SD
N端末装置は同時発呼を検出することが可能となる。In this way, by checking the control channel information 21 prefixed to the transmission signal of the network terminal device 13, each ISD
N terminal devices can detect simultaneous calls.
以上説明したように、本発明は、網終端装置とI SD
N端末装置との間の伝送路を無線回線としても、有線回
線と同等の接続が可能であるという効果を有する。As explained above, the present invention provides a network termination device and an ISD.
Even if the transmission path with the N terminal device is a wireless line, it has the effect that a connection equivalent to a wired line is possible.
第1図は本発明の一実施例のブロック図、第2図は網終
端装置13とI SDN端末装置1およびI SDN端
末装置2との間の信号の授受を示す信号シーケンス図で
ある。
1.2・・・・・・I SDN端末装置、3,4・・・
・・・スペクトル拡散方式送信機、5.6・・・・・・
位相変調方式または周波数変調方式受信機、7.8・・
・・・・データ制御部、9,10・・・・・・遅延回路
、11.12・・・・・・比較検出回路、13・・・・
・・網終端装置、14・・・・・・スペクトル拡散方式
受信機、15・・・・・・位相変調方式または周波数変
調方式送信機、16・・・・・・網終端制御部、17・
・・・・・空線信号、18・・・・・・基準、1920
・・・・・・時間差、21・・・・・・制御チャネル情
報、22・・・・・・ループ遅延時間。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a signal sequence diagram showing the transmission and reception of signals between the network termination device 13 and the ISDN terminal devices 1 and 2. In FIG. 1.2...I SDN terminal device, 3,4...
...Spread spectrum transmitter, 5.6...
Phase modulation type or frequency modulation type receiver, 7.8...
...Data control unit, 9, 10...Delay circuit, 11.12...Comparison detection circuit, 13...
... Network termination device, 14 ... Spread spectrum receiver, 15 ... Phase modulation method or frequency modulation method transmitter, 16 ... Network termination control unit, 17.
...Blank signal, 18...Standard, 1920
......Time difference, 21...Control channel information, 22...Loop delay time.
Claims (1)
以上のISDN端末装置との間の伝送路を無線回線とし
、前記網終端装置は受信信号に含まれる制御チャネル情
報を取出す機能を備えるスペクトル拡散方式受信機と、
前記取出した制御チャネル情報を送出する制御情報に含
ませる機能を備える位相変調方式または周波数変調方式
送信機とを備え、前記ISDN端末装置は位相変調方式
または周波数変調方式受信機とスペクトル拡散方式送信
機と前記網終端装置から受信した前記制御情報に含まれ
る制御チャネル情報を自己の送出した制御チャネル情報
と同一であるか否かを判定する比較検出回路とを備えて
いることを特徴とするISDN端末装置接続方式。In the ISDN terminal device connection method, the transmission path between the network terminating device and one or more ISDN terminal devices is a wireless line, and the network terminating device has a function of extracting control channel information contained in a received signal.A spread spectrum method is used. receiver and
The ISDN terminal device includes a phase modulation type or frequency modulation type transmitter having a function of including the extracted control channel information in the control information to be transmitted, and the ISDN terminal device includes a phase modulation type or frequency modulation type receiver and a spread spectrum type transmitter. and a comparison detection circuit that determines whether the control channel information included in the control information received from the network termination device is the same as the control channel information transmitted by the ISDN terminal. Device connection method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1176530A JPH0340535A (en) | 1989-07-06 | 1989-07-06 | Isdn terminal equipment connecting system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1176530A JPH0340535A (en) | 1989-07-06 | 1989-07-06 | Isdn terminal equipment connecting system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0340535A true JPH0340535A (en) | 1991-02-21 |
Family
ID=16015225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1176530A Pending JPH0340535A (en) | 1989-07-06 | 1989-07-06 | Isdn terminal equipment connecting system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0340535A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008249626A (en) * | 2007-03-30 | 2008-10-16 | Chugoku Electric Power Co Inc:The | Light-emitting body and electroscope |
-
1989
- 1989-07-06 JP JP1176530A patent/JPH0340535A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008249626A (en) * | 2007-03-30 | 2008-10-16 | Chugoku Electric Power Co Inc:The | Light-emitting body and electroscope |
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