JPS59133754A - Multiplex transmission system - Google Patents
Multiplex transmission systemInfo
- Publication number
- JPS59133754A JPS59133754A JP671083A JP671083A JPS59133754A JP S59133754 A JPS59133754 A JP S59133754A JP 671083 A JP671083 A JP 671083A JP 671083 A JP671083 A JP 671083A JP S59133754 A JPS59133754 A JP S59133754A
- Authority
- JP
- Japan
- Prior art keywords
- line
- speed
- data
- line number
- low
- 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
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
Abstract
Description
【発明の詳細な説明】
（発明の属する分野）
本発明はデータ通信システムにおいて、１本の高速回線
に複数の低速な調歩同期端末（計算機を含む）を収容す
る場合の多重装置あるいは集線装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION (Field to which the invention pertains) The present invention relates to a multiplexing device or a line concentrator for accommodating a plurality of low-speed asynchronous terminals (including computers) on one high-speed line in a data communication system. It is something.
（従来の技術）
従来のこの種の装置は、低速回線のデータを高速回線の
タイムスロットに固定的に割当てており、低速で送信さ
れてぐる調歩同期データを高速なりロックパルスでサン
プリングし高速な同期データとみなして多重化していた
。そのため、調歩同期データが入力されていない場合に
も、連続する１１１Ｎもしくはｎ０１１というデータが
入力されたものとして高速回線のタイムスロットを割り
当てており、高速回線を効率的罠使用していないという
欠点力；あった０
（発明の目的）
本発明は上記の欠点を除去し、高速回線をより効率的に
使用するために、調歩同期データを１文字単位で取り込
み、必要に応じて高速回線のタイムスロットを割シ当て
るようにしたもので、以下図面について詳細に説明する
。(Prior art) This type of conventional equipment fixedly allocates data on a low-speed line to a time slot on a high-speed line, and samples start-stop synchronized data transmitted at a low speed with a lock pulse at a high speed to transmit data at a high speed. It was considered as synchronous data and multiplexed. Therefore, even if no start-stop synchronization data is input, the time slot of the high-speed line is assigned as if continuous 111N or n011 data were input, and the drawback is that the high-speed line is not used efficiently. ; was 0 (Object of the invention) In order to eliminate the above-mentioned drawbacks and use the high-speed line more efficiently, the present invention captures start-stop synchronization data in character units, and uses the time slot of the high-speed line as necessary. The drawings will be explained in detail below.
（発明の構成および作用）
第１図は、１本の高速回線にＮ台の調歩同期端末を収容
する場合の本発明の一実施例の構成を示すブロック図で
あって、１には低速回線（ｋ＝ｘ。(Structure and operation of the invention) FIG. 1 is a block diagram showing the structure of an embodiment of the present invention when one high-speed line accommodates N asynchronous terminals. (k=x.
２・・・・・・・・・Ｎ１以下同じ）、２には調歩同期
データ送受信部、３は回線番号付与部、４は送信バッフ
ァ、５は高速データ送受信部、６は高速回線、７は回線
番号識別部、８には受信バッファである。2...N1 and below), 2 is an asynchronous data transmitting and receiving section, 3 is a line number assigning section, 4 is a sending buffer, 5 is a high speed data transmitting and receiving section, 6 is a high speed line, 7 is a The line number identification section 8 is a receiving buffer.
送信動作について説明する。低速回線１ｋから入力され
る調歩同期データを送受信部２ｋが取込み、調歩同期デ
ータのスタートヒツトとストップヒツトを取除き、デー
タ部分の１文字分のみを回線番号付与部３に入力する。The transmission operation will be explained. A transmitter/receiver section 2k takes in the astop synchronization data input from the low-speed line 1k, removes the start hit and stop hit of the astop synchronization data, and inputs only one character of the data portion to the line number assigning section 3.
回線番号付与部３は、入力された各文字データの送信元
である低速回線１ｋに対応する回線番号を各文字データ
に付与し、順次送信バッファ４に格納する。高速データ
送受信部５は、送信バッファ４から逐次回線番号付き文
字データを取出し、高速回線６のタイムスロットに割当
てて送信する。The line number assigning unit 3 assigns a line number corresponding to the low-speed line 1k that is the transmission source of each input character data to each character data, and sequentially stores the data in the transmission buffer 4. The high-speed data transmitting/receiving unit 5 sequentially extracts character data with line numbers from the transmission buffer 4, allocates it to a time slot of the high-speed line 6, and transmits it.
次に、受信動作を説明する。高速データ送受信部５は、
高速回線６からタイムスロットに従い回線番号付き文字
データを受信し、回線番号識別部７に入力する。回線番
号識別部７は、回線番号を識別して文字データを受信バ
ッファ８ｋに分配する。調歩同期データ送受信部２には
、受信バッファ８ｋから順次受信データを取出しスター
トビットとストップビットを付与して低速回線１ｋを通
して端末に受信させる。Next, the reception operation will be explained. The high-speed data transmitter/receiver 5 is
Character data with line numbers is received from the high-speed line 6 according to the time slot, and is input to the line number identification section 7. The line number identifying section 7 identifies the line number and distributes the character data to the receiving buffer 8k. The asynchronous data transmitting/receiving unit 2 sequentially extracts received data from the receive buffer 8k, adds a start bit and a stop bit, and causes the terminal to receive the data through the low-speed line 1k.
第２図（ａ）及び（ｂ）は、第１図の実施例において文
字データに回線番号の差分を付与する場合の回線番号付
与部３及び回線番号識別部７の構成例である。FIGS. 2(a) and 2(b) show an example of the configuration of the line number assigning section 3 and the line number identifying section 7 when a difference in line number is assigned to character data in the embodiment of FIG. 1.
第２図（ａ）において、回線番号記憶部３】は、送受信
部２ｋから入力された各文字データの送信元である低速
回線１にの回線番号を一時記憶するものであり、現在ｍ
ｏなる値を記憶していたとする。In FIG. 2(a), the line number storage unit 3 temporarily stores the line number of the low-speed line 1 that is the source of each character data input from the transmitting/receiving unit 2k, and is currently m
Suppose that you have memorized a value o.
今Ｘｍｌなる回線番号を持つ低速回線１ｋからの文字デ
ータが送受信部２ｋを経由して演算部３２に入力される
と、演算部３２はその回線番号ｍ１と回線番号記憶部３
１に記憶しである回線番号ｍＱとを比較し、差分Ｄ＝ｍ
ｌ−ｍＱを取シ、Ｄがある範囲〔−ｒ、、、Ｌ〕以内で
あれば、Ｄを回線番号として各文字データに付与し送信
バッファ４に格納する。When the character data from the low-speed line 1k having the line number Xml is input to the calculation unit 32 via the transmitting/receiving unit 2k, the calculation unit 32 stores the line number m1 and the line number storage unit 3.
Compare the line number mQ stored in 1 and find the difference D=m
If D is within a certain range [-r, . . . L], D is assigned to each character data as a line number and stored in the transmission buffer 4.
上記差分りが、上記範囲［−Ｌ、Ｌ：］を越えていると
き、入力された文字データに対応する絶対的な回線番号
ｍ１そのものを文字データとし、回線番号として特定番
号を付与して、送信バッファ４に格納するとともに、入
力、された文字データには差分Ｄ＝Ｏを付与して送信バ
ッファ４に格納する。When the difference exceeds the range [-L, L:], the absolute line number m1 corresponding to the input character data is used as character data, and a specific number is assigned as the line number, The data is stored in the transmission buffer 4, and the input character data is given a difference D=O and stored in the transmission buffer 4.
回線番号記憶部３１は回線番号付き文字データが送信バ
ッファ４に格納された後、これまで記憶していた回線番
号ｍＯに替えて、金入力した文字データに対応する回線
番号ｍ１を記憶する。After the character data with line number is stored in the transmission buffer 4, the line number storage unit 31 stores the line number m1 corresponding to the inputted character data in place of the line number mO that has been stored so far.
回線番号抽出部７１は、高速データ送受信部５から入力
した回線番号付き文字データから回線番号を抽出し、回
線番号が特定番号であれば、文字データとして受信した
絶対的な回線番号を回線番号記憶部７２に記憶させる。The line number extraction unit 71 extracts a line number from the character data with line number input from the high-speed data transmission/reception unit 5, and if the line number is a specific number, stores the absolute line number received as character data. The information is stored in the section 72.
回線番号が特定番号でなければ、演算部７３は抽出した
回線番号の値と回線番号記憶部７２に記憶されている値
とを加算し、その演算結果を回線番号記憶部７２に記憶
させるとともに、その演算結果が示す回線番号に対応す
る受信バッファ８ｋに文盲データを分配する。If the line number is not a specific number, the calculation unit 73 adds the value of the extracted line number and the value stored in the line number storage unit 72, stores the calculation result in the line number storage unit 72, and The illiterate data is distributed to the receiving buffer 8k corresponding to the line number indicated by the calculation result.
以上のように、調−同期データが入力されている時のみ
、当該文字データに高速回線のタイムスロットを割当て
るので、ある低速回線にデータが入力されていない時は
別の低速回線の文字データにタイムスロットを割当てる
ことができ、更に、回線番号として差分を付与すること
によシ、必要となる回線番号領域を圧縮することができ
、高速回線の有効利用が図れる。As described above, only when synchronization data is being input, the time slot of the high-speed line is assigned to the character data, so when no data is being input to a certain low-speed line, the character data is assigned to another low-speed line. By assigning time slots and adding a difference as a line number, the required line number area can be compressed, and high-speed lines can be used effectively.
（効 果）
以上説明したように、本発明の方式は各低速回線から入
力される調歩同期データの文字データごとに高速回線の
タイムスロットを動的に割西てるので、従来のように各
低速回線にタイムスロットを固定的に割当てる場合に比
べ、各低速回線から調歩同期データが入力されていない
時にも高速回線ツタイムスロットを割当ててしまうとい
う現象がなく、高速回線の使用効率を向上させるととが
できる。壕だ、調歩同期端末が′主として会話形で用い
られることから低速回線の低トラヒツク性を考慮すると
低速回線の多重度を従来のものより向上させることがで
きる。さらに各低速回線ごとに送受信部と受信バッファ
を持たせる構成であるので、低速回線の増設に柔軟に対
処できる他、回線速度の異なる調歩同期端、末同士の通
信、いわゆる異速度通信も可能である。(Effects) As explained above, the method of the present invention dynamically allocates time slots on high-speed lines for each character data of asynchronous data input from each low-speed line. Compared to the case of fixedly allocating time slots to lines, there is no problem of allocating high-speed line time slots even when asynchronous data is not input from each low-speed line, which improves the efficiency of high-speed line usage. I can do that. Since start-stop synchronization terminals are mainly used for conversational purposes, considering the low traffic characteristics of low-speed lines, it is possible to improve the multiplicity of low-speed lines compared to conventional ones. Furthermore, since each low-speed line has a transmitting/receiving unit and a receiving buffer, it is possible to flexibly deal with the addition of low-speed lines, and it is also possible to communicate between start-stop synchronized terminals and terminals with different line speeds, so-called different speed communication. be.
第１図は本発明の一実施例の構成を示すブロック図、第
２図は第１図における回線番号付与部３と回線番号識別
部７の構成例を示す図である。
ｌｋ （ｋ＝ １．２．・・・・・・Ｎ）・・・・・・
・低速回線、２ｋ （ｋ＝ １．２．・・・Ｎ）・・・
・・・・・調歩同期データ送受信部、 ３・・・・・・
・・・回線番号付与部、４・・・・・・・・・送信バッ
ファ、 ５ ・・・・・ 高速データ送受信部、 ６・
・・・・・・高速回線、 ７・・・・・・・・回線番号
識別部、８ｋ（ｋ＝１．２．・・・・・・Ｎ）・・・・
・・・・受信′ゝツファ・ ３１・・・・・・・・・回
線番号記憶部、３２・・・・・・・・・演算部、７１・
・・・・・・・回線番号抽出部、７２・・・・・・・・
・回線番号記憶部、７３・・曲・・・演算部。
２９５FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the configuration of the line number assigning section 3 and line number identifying section 7 in FIG. 1. lk (k= 1.2...N)...
・Low speed line, 2k (k= 1.2...N)...
...Start-stop synchronization data transmitting and receiving section, 3...
... Line number assigning unit, 4...... Transmission buffer, 5... High-speed data transmission/reception unit, 6.
...High speed line, 7...Line number identification section, 8k (k=1.2...N)...
31... Line number storage section, 32... Arithmetic section, 71.
......Line number extraction section, 72...
- Line number storage section, 73... Song... Calculation section. 295
Claims (2)
歩同期データを多重化し、１本の高速回線を経由して通
信相手に伝送し、通信°相手からこの高速回線経由で伝
送されてくる多重化データを分解して前記各端末に配送
し受信させる多重伝送システムにおいて、各端末に対応
した低速回線に回線番号を割当て、各低速回線対応に送
受信部と受信バッファを持ち、多重化する際に、各端末
の送信した調歩同期データの１文字ごとに前記回線番号
を付与し、この回線番号付き文字データを各低速回線が
共有する送信バッファに一時蓄積させ、送信し、受信し
た多重化データを分解する際に、付与された回線番号に
より１文字ごと上記各低速回線対応の受信バッファに分
配し、各端末に受信させることを特徴とする多重伝送方
式。(1) Low-speed start-stop synchronization data sent by multiple terminals (including computers) is multiplexed, transmitted to the communication partner via one high-speed line, and transmitted from the communication partner via this high-speed line. In a multiplex transmission system in which multiplexed data is decomposed and delivered to and received by each terminal, a line number is assigned to a low-speed line corresponding to each terminal, and a transmitting/receiving unit and a receiving buffer are provided for each low-speed line to perform multiplexing. At this time, the line number is assigned to each character of the start-stop synchronization data transmitted by each terminal, and this line numbered character data is temporarily stored in a transmission buffer shared by each low-speed line, and multiplexed data is transmitted and received. A multiplex transmission system characterized in that when data is decomposed, each character is distributed to the reception buffers corresponding to each of the low-speed lines according to the assigned line number, and each terminal receives the data.
の調歩同期データを多重化し、１本の高速回線を経由し
て通信相手に伝送し、通信相手からこの高速回線経由で
伝送されてくる多重化データを分解して前記各端末に配
送し受信させる多重伝送システムにおいて、各端末に対
応した低速回線に回線番号を割当て、各低速回線対応に
送受信部と受信バッファを持ち、多重化する際に、前回
送信した文字データの回線番号と今回送信する文字デー
タの回線番号との差分を取り、その差分がある範囲内で
あればその差分を回線番号とし、差分が上記範囲を越え
ていれば絶対的な回線番号を表わす特定番号を回線番号
として各端末の送信した調歩同期データの１文字ごとに
付与し、送信し、相手に回線番号の差分を取るための基
準の回線番号を通知し、文字データに付与する回線番号
領域を圧縮することを特徴とする多重伝送方式。(2) Low-speed start-stop synchronization data sent by multiple terminals (including computers) is multiplexed, transmitted to the communication partner via a single high-speed line, and then transmitted from the communication partner via this high-speed line. In a multiplex transmission system in which multiplexed data is decomposed and delivered to and received by each terminal, a line number is assigned to a low-speed line corresponding to each terminal, and a transmitting/receiving unit and a receiving buffer are provided for each low-speed line. Then, take the difference between the line number of the character data sent last time and the line number of the character data sent this time, and if the difference is within a certain range, use that difference as the line number, and if the difference exceeds the above range, A specific number representing an absolute line number is assigned as a line number to each character of the start-stop synchronization data sent by each terminal, and transmitted, and the other party is notified of the reference line number for calculating the difference in line numbers. A multiplex transmission method characterized by compressing the line number area assigned to character data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP671083A JPS59133754A (en) | 1983-01-20 | 1983-01-20 | Multiplex transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP671083A JPS59133754A (en) | 1983-01-20 | 1983-01-20 | Multiplex transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59133754A true JPS59133754A (en) | 1984-08-01 |
Family
ID=11645842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP671083A Pending JPS59133754A (en) | 1983-01-20 | 1983-01-20 | Multiplex transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59133754A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6137795A (en) * | 1997-03-19 | 2000-10-24 | Fujitsu Limited | Cell switching method and cell exchange system |
-
1983
- 1983-01-20 JP JP671083A patent/JPS59133754A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6137795A (en) * | 1997-03-19 | 2000-10-24 | Fujitsu Limited | Cell switching method and cell exchange system |
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