JPS59216346A - Call reserving system - Google Patents
Call reserving systemInfo
- Publication number
- JPS59216346A JPS59216346A JP58090934A JP9093483A JPS59216346A JP S59216346 A JPS59216346 A JP S59216346A JP 58090934 A JP58090934 A JP 58090934A JP 9093483 A JP9093483 A JP 9093483A JP S59216346 A JPS59216346 A JP S59216346A
- Authority
- JP
- Japan
- Prior art keywords
- call
- terminal
- call reservation
- packet
- reservation
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は発呼予約方式に関し、特にパケット交換網にお
ける発呼予約方式に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a call reservation system, and particularly to a call reservation system in a packet switching network.
従来、パケット交換網に収容された加入者端末が発呼す
るときは、発呼コマンドによって発呼略号と通信相手端
末番号および必要ならば着信課金要求等のファシリティ
の指定を入力していた。しかるに、前記発呼コマンド自
体が神々のパラメータを入力するため、その入力を済ま
すまでの時間が長くなるので、との入力中に他の端末か
ら発呼端末に着信かめる場合がしばしば起こる。一方、
交換局では発呼端末から発呼コマンドの最終符号を受信
した時点で発呼コマンドと認識し必要な処理を行うので
、前記端末から発呼の意志が発生してから前記交換局が
発呼コマンドを認識するまでの時間も長くなる。従って
上記の場合には端末からの発呼の意志が無視され着信が
ある間は発呼できたいという欠点があった。Conventionally, when a subscriber terminal accommodated in a packet-switched network makes a call, it inputs a calling abbreviation, a communication partner terminal number, and, if necessary, a facility designation such as a call termination charge request, using a calling command. However, since the calling command itself inputs divine parameters, it takes a long time to complete the input, so it often happens that the calling terminal receives an incoming call from another terminal while inputting. on the other hand,
When the switching center receives the final code of the calling command from the calling terminal, it recognizes it as a calling command and performs the necessary processing, so the switching center recognizes the calling command as the calling command after the terminal generates the intention to call. The time it takes to recognize it also takes longer. Therefore, in the above case, the terminal's intention to make a call is ignored, and there is a drawback that it is desirable to be able to make a call while there is an incoming call.
本発明の目的は、端末による発呼の意志の発生時点と交
換局による発呼コマンドの認識時点との時間差を短縮す
るだめの特殊な発呼予約信号を定義し、前記交換局では
前記発呼予約信号を受信したとき、前記端末を発呼予約
状態とし、この予約状態継続中は他端末から発呼予約端
末への着信を禁止することによシ上記欠点を除去し、効
率の良いパケット通信が行われるようにした発呼予約方
式を提供することにある。An object of the present invention is to define a special call reservation signal to shorten the time difference between the time when the terminal generates the intention to make a call and the time when the switching center recognizes the calling command, and the switching center When a reservation signal is received, the terminal is placed in a call reservation state, and while this reservation state continues, incoming calls from other terminals to the call reservation terminal are prohibited, thereby eliminating the above disadvantages and achieving efficient packet communication. An object of the present invention is to provide a call reservation method that enables the following.
本発明による発呼予約方式は、複数の加入者端末間で交
換局を介してパケット通信を行うパケット交換網におい
て、前記加入者端末が発呼コマンドに先立ち送信した特
定の発呼予約信号を前記交換局で受信したとき該加入者
端末への他の加入者端末からの着信を禁止する発呼予約
手段を備えることを特徴とする。また、発呼予約手段は
加入者端末からの特定の発呼予約信号を受信検出する予
約信号検出回路と、該発呼予約信号が検出されたときセ
ットされるタイマ回路とを含んでなシ、パケット処理部
に前記予約信号検出回路が前記発呼予約信号を検出した
とき発呼予約状態を指示し前記タイマがタイムアウトし
たとき該発呼予約状態の解除を指示することを特徴とす
る。The call reservation method according to the present invention is a packet switching network in which packet communication is performed between a plurality of subscriber terminals via a switching center, in which a specific call reservation signal transmitted by the subscriber terminal prior to a call command is sent to the The present invention is characterized in that it includes call reservation means for prohibiting incoming calls from other subscriber terminals to the subscriber terminal when the call is received at the exchange. Further, the call reservation means includes a reservation signal detection circuit that receives and detects a specific call reservation signal from the subscriber terminal, and a timer circuit that is set when the call reservation signal is detected. The present invention is characterized in that when the reservation signal detection circuit detects the call reservation signal, the reservation signal detection circuit instructs the packet processing unit to enter the call reservation state, and when the timer times out, instructs the packet processing unit to cancel the call reservation state.
次に図面を参照して本発明について説明する。Next, the present invention will be explained with reference to the drawings.
図は本発明の発呼予約方式の一実施例を示すブロック図
である。同図において、パケット交換網は発着信両用端
末(以下単に端末)1と、通信回線2を介して該端末1
と接続されるパケット交換局(以下単に交換局)3と、
該交換局3と通信目録4を介して接続される他の端末5
とから成る。該交換局3は前記通信回線2,4間に介在
する発呼予約装置30と、前記端末1,5を含む収容端
末間の呼制御やパケット転送制御を行うパケット処理部
31とから成り、例えば前記端末1,5間における転送
中のパケットは前記通信回線22発発呼予約手段0.パ
ケット処理部31および通信回線4を介して送受信され
る。なお前記端末1と発呼予約装置30の間では特殊な
信号(例えば互いに異なる特定の文字)を発呼予約信号
および発呼予約取消信号としてあらかじめ定義しておく
。前記発呼予約装置30は前記通信回線2と接続され前
記端末1からの前記発呼予約信号および発呼予約取消信
号を受信検出する信号検出回路300と、タイマ設定線
310を介して前記信号検出回路圓から受ける指示によ
シ所定の時間のタイミングを開始するタイマ回路301
を含んで成シ、前記信号検出回路300.タイマ回路3
01はそれぞれ指示線311,312を介して前記パケ
ット処理部31に発呼予約状態指示2発呼予約状態解除
指示を行う。The figure is a block diagram showing an embodiment of the call reservation system of the present invention. In the figure, the packet switching network includes a terminal for both sending and receiving calls (hereinafter simply referred to as a terminal) 1 and a terminal 1 via a communication line 2.
A packet switching center (hereinafter simply referred to as a switching center) 3 connected to
Another terminal 5 connected to the exchange 3 via the communication list 4
It consists of The exchange 3 includes a call reservation device 30 interposed between the communication lines 2 and 4, and a packet processing unit 31 that performs call control and packet transfer control between the accommodated terminals including the terminals 1 and 5, and includes, for example, Packets being transferred between the terminals 1 and 5 are sent to the communication line 22 by the calling reservation means 0. It is transmitted and received via the packet processing unit 31 and the communication line 4. Note that special signals (for example, specific characters that are different from each other) are defined in advance between the terminal 1 and the call reservation device 30 as a call reservation signal and a call reservation cancellation signal. The call reservation device 30 is connected to the communication line 2 and detects the signal through a signal detection circuit 300 that receives and detects the call reservation signal and the call reservation cancellation signal from the terminal 1, and a timer setting line 310. A timer circuit 301 that starts timing at a predetermined time according to instructions received from the circuit circle.
The signal detection circuit 300. Timer circuit 3
01 issues a call reservation status instruction 2 to the packet processing unit 31 via instruction lines 311 and 312, respectively, to cancel the call reservation status.
続いて本実施例の動作について説3明する。Next, the operation of this embodiment will be explained.
端末1は発呼したいと思った時点で前記発呼予約信号を
通信回線2へ送信する。交換局3では信号検出回路30
0が前記発呼予約信号を受信検出すると、指示線311
を介してパケット処理部31に前記端末工の状態を発呼
予約状態とするよう指示する。該指示によシ前記パケッ
ト処理部31は一般に知られる方法でこの時点以降前記
端末1への他端末からの着信を禁止するので、該端末1
からの発呼処理が妨げられることはなくなる。すなわち
該端末lが発呼コマンドを入力すると、#配パケット処
理部31は前記通信回線2.信号検出回路300を介し
て受信した前記発呼コマンドを分析し、通信回線4を介
して所望の相手端末5への接続制御を行い両端末1,5
間のパケット転送制御を行う。なお前記発呼予約信号を
受信検出した時点で前記信号検出回路300からの指示
によってタイム回路301はタイミングを開始し、あら
かじめ設定された時間が経過したとき(タイムアウトし
たとき)指示線312を介して前記パケット処理部31
に発呼予約状態解除指示を行うので該パケット処理部3
1は前記端末1への着信禁止状態を解除する。従って前
記端末lが発呼予約をしたにもかかわらす発呼を行わな
い場合でも該端末1への着信禁止状態が永久的に続くこ
とはない。更に前記端末1が前記タイムアウトする前に
発呼予約を取消したいときは、核端末1からの前記発呼
予約取消信号を前記信号検出回路300が受信検出した
とき前記指示線311を介して前記パケット処理部31
に着信禁止状態解除指示を行うので、該パケット処理部
31は同様に前記端末1への着信禁止状態を解除する。When the terminal 1 wants to make a call, it transmits the call reservation signal to the communication line 2. At the exchange 3, a signal detection circuit 30
0 receives and detects the call reservation signal, the instruction line 311
It instructs the packet processing unit 31 to change the state of the terminal to a call reservation state via the terminal. In response to this instruction, the packet processing unit 31 prohibits the terminal 1 from receiving calls from other terminals from this point forward using a generally known method.
There will be no hindrance to call processing from. That is, when the terminal l inputs a calling command, the #distribution packet processing unit 31 connects the communication line 2. The calling command received via the signal detection circuit 300 is analyzed, and the connection to the desired partner terminal 5 is controlled via the communication line 4.
Performs packet transfer control between Note that the time circuit 301 starts timing according to an instruction from the signal detection circuit 300 at the time when the call reservation signal is received and detected, and when a preset time has elapsed (timeout), the time circuit 301 starts timing via the instruction line 312. The packet processing section 31
Since the instruction to cancel the call reservation state is given to the packet processing unit 3
1 cancels the incoming call prohibition state to the terminal 1. Therefore, even if the terminal 1 makes a call reservation but does not make a call, the state in which incoming calls to the terminal 1 are prohibited will not continue forever. Further, when the terminal 1 wants to cancel the call reservation before the timeout, when the signal detection circuit 300 receives and detects the call reservation cancellation signal from the nuclear terminal 1, the packet is sent via the instruction line 311. Processing section 31
Since the packet processing unit 31 issues an instruction to cancel the incoming call prohibition state, the packet processing unit 31 similarly releases the incoming call prohibition state to the terminal 1.
なお発呼予約装置30の構成要件はいずれも従来技術に
よって容易に実現可能々ものである。It should be noted that all the constituent elements of the call reservation device 30 can be easily realized using conventional techniques.
以上の訝明によシ明らかなように本発明の発呼予約方式
によれば、端末から発呼予約を行うととによυ通信トラ
ヒックが多い時間帯でも発呼を妨げられることがないの
で、効率の良いパケット通信が実現されるという効果が
生じる。As is clear from the above questions, according to the call reservation method of the present invention, if the call reservation is made from the terminal, the call will not be blocked even during times when there is a lot of communication traffic. This has the effect of realizing efficient packet communication.
図は本発明の発呼予約方式の一実施例を示すブロック図
である。The figure is a block diagram showing an embodiment of the call reservation system of the present invention.
Claims (1)
通信を行うパケット交換網において、前記加入者端末が
発呼コマンドに先立ち送信した特定を備えることを特徴
とする発呼予約方式。 (2、特許請求の範囲第(1)項記載の発呼予約方式に
おいて、発呼予約手段は加入者端末からの特定の発呼予
約信号を受信検出する予約信号検出回路と、該発呼予約
信号が検出されたときセットされるタイマ回路とを含ん
でなシ、ノくケラト処理部に前記予約信号検出回路が前
記発呼予約信号を検出したとき発呼予約状態を指示し前
記タイマがタイムアウトしたとき該発呼予約状態の解除
を指示することを特徴とする発呼予約方式。(1) In a packet-switched network that performs communication between a plurality of subscriber terminals via a switching center, a call reservation method is characterized in that the subscriber terminal includes a specification transmitted prior to a call command. (2. In the call reservation method described in claim (1), the call reservation means includes a reservation signal detection circuit that receives and detects a specific call reservation signal from the subscriber terminal, and a timer circuit that is set when a reservation signal is detected; A call reservation method characterized in that when a timeout occurs, an instruction is given to cancel the call reservation state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58090934A JPS59216346A (en) | 1983-05-24 | 1983-05-24 | Call reserving system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58090934A JPS59216346A (en) | 1983-05-24 | 1983-05-24 | Call reserving system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59216346A true JPS59216346A (en) | 1984-12-06 |
Family
ID=14012273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58090934A Pending JPS59216346A (en) | 1983-05-24 | 1983-05-24 | Call reserving system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59216346A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010081111A (en) * | 2008-09-24 | 2010-04-08 | Canon Inc | Facsimile apparatus, and control method and storage medium therefor |
-
1983
- 1983-05-24 JP JP58090934A patent/JPS59216346A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010081111A (en) * | 2008-09-24 | 2010-04-08 | Canon Inc | Facsimile apparatus, and control method and storage medium therefor |
US8416440B2 (en) | 2008-09-24 | 2013-04-09 | Canon Kabushiki Kaisha | Facsimile apparatus, and control method and storage medium therefor |
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