JPS62258535A - Data transmission method - Google Patents
Data transmission methodInfo
- Publication number
- JPS62258535A JPS62258535A JP10234986A JP10234986A JPS62258535A JP S62258535 A JPS62258535 A JP S62258535A JP 10234986 A JP10234986 A JP 10234986A JP 10234986 A JP10234986 A JP 10234986A JP S62258535 A JPS62258535 A JP S62258535A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- data
- station
- data transmission
- communication medium
- 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 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims description 16
- 238000004891 communication Methods 0.000 claims abstract description 48
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 5
- 230000008054 signal transmission Effects 0.000 description 13
- 230000001934 delay Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はデータ伝送方法に関し、さらに明確にはデータ
パケットスイッチングに基づくデータ伝送方法の改善に
関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to data transmission methods, and more particularly to improvements in data transmission methods based on data packet switching.
従来の技術
従来データパケットスイッチングに基づくデータ伝送方
法は主に３種類あった。BACKGROUND OF THE INVENTION Conventionally, there are mainly three types of data transmission methods based on data packet switching.
第１の方法はＣ８ＭＡ／ＣＤ （衝突検出機能付キャ
リアセンスマルチプルアクセス）と呼ばれる技術による
もので（特公昭５７ ５５２６４ ）あり、この動作概
要を下記に示す。The first method is based on a technology called C8MA/CD (carrier sense multiple access with collision detection function) (Japanese Patent Publication No. 57-55264), and an outline of its operation is shown below.
（１）成る端末装置が通信媒体にデータ信号を送信する
際にはあらかじめ他局の端末装置が通信通信媒体にデー
タ信号を送信していないことを確認する。送信していれ
ば送信完了を待つ。その後データ信号を通信媒体に送信
する。(1) When a terminal device transmits a data signal to a communication medium, it is confirmed in advance that a terminal device of another station is not transmitting a data signal to the communication medium. If it is being sent, wait for it to complete. The data signal is then transmitted to a communication medium.
（２）同時に通信媒体へ送信開始した他局端末装置が存
在する場合が発生する可能性があり、このときには通信
媒体上でデータ信号が衝突する。(2) There is a possibility that there is another station terminal device that starts transmitting to the communication medium at the same time, and in this case, data signals collide on the communication medium.
送信中の端末装置は故意にデータ信号を追加し、衝突が
全局の端末装置に伝達されることを図る。The transmitting terminal intentionally adds data signals to ensure that collisions are communicated to all terminals.
（３）当該の局は無作為の時間休止状態を続けた後、通
信媒体へ再送を行なう。(3) The station in question remains dormant for a random period of time and then retransmits to the communication medium.
第２の方法はトークンパ／ングと呼ばれる技術よるもの
であり、この動作概要を下記に示す。The second method is based on a technique called token parsing, and an outline of its operation is shown below.
（１）トークンは通信媒体へのデータ信号の送信の権利
を制御する。すなわち、トークンを保持する端末装置は
通信媒体に対する一時的な制御権を持つ。(1) The token controls the right to transmit data signals onto the communication medium. That is, the terminal device holding the token has temporary control over the communication medium.
（２）トークンは通信媒体に接続されている端末装置の
間で受は渡される。(2) Tokens are passed between terminal devices connected to a communication medium.
（３）送信側の端末装置はフリート−クンを渡されるの
を待ち、フリート−クンを受取ると７リートークンをビ
ジートークンに変更し、かつビン−トークンにデータを
付加して送信する。(3) The terminal device on the sending side waits for the free token to be handed over, and upon receiving the free token, changes the 7ly token to a busy token, adds data to the bin token, and transmits it.
（４）受信側の端末装置はビジートークンに付加されて
いるデータを複写する。(4) The terminal device on the receiving side copies the data added to the busy token.
（５）送信側の端末装置は返ってさたビジートークンを
フリート−クンに変更し、かつデータをはずして次局の
端末装置にフリート−クンを渡す。(5) The transmitting terminal device changes the returned busy token to a free token, removes the data, and passes the free token to the next station's terminal device.
第３の方法は時分割と呼ばれる技術によるものであり、
動作概要を下記に示す。The third method is based on a technique called time division.
An overview of the operation is shown below.
（１） 任意なる一定時間を通信媒体につながってい
る各局端末装置に割当てる。これによっである局は一定
時間ごとに通信可能な一定な時間を得る。(1) An arbitrary fixed time is allocated to each station terminal device connected to the communication medium. As a result, a certain station obtains a fixed amount of time during which it can communicate at fixed intervals.
（２） 自局各端末装置に割当てられた時間のみ使っ
よれば以下の問題が生ずる。(2) If only the time allotted to each terminal device of the own station is used, the following problems will occur.
先ず前記第１の方法では通信媒体に接続されている端末
装置が多数あり、かつ各局が通信媒体へ頻繁にデータ信
号を送信する場合衝突が回数多く発生する。このため再
送も回数多く行なわれることになるため、実効的なデー
タ伝送の速度が滞ってしまう。かつ、いつまでたっても
再送の繰り返しで送信出来ない局が発生することもあり
うる。First, in the first method, if there are a large number of terminal devices connected to a communication medium and each station frequently transmits data signals to the communication medium, collisions occur many times. As a result, retransmission is performed many times, which slows down the effective data transmission speed. Furthermore, there may be some stations that are unable to transmit due to repeated retransmissions.
前記第２の方法では通信媒体へデータ信号を送信する時
にはフリート−クンが渡されるのを待つ必要がある。こ
のためデータ送信を要求している端末装置の数が少ない
場合にもある一定時間待つ必要が生じてしまう。すなわ
ち、通信媒体をデータ信号の送信に使用している時間比
率が低い。このため全局の総合のデータ伝送量が少ない
時に実効的な伝送速度が低い。In the second method, it is necessary to wait for free tokens to be delivered when transmitting data signals to the communication medium. Therefore, even if the number of terminal devices requesting data transmission is small, it is necessary to wait for a certain period of time. That is, the proportion of time that the communication medium is used for transmitting data signals is low. Therefore, when the total data transmission amount of all stations is small, the effective transmission speed is low.
第３の方法では通信媒体へデータ信号を送信する場合に
は、自局端末装置に割当てられた時間がくるのを待つ必
要があり上記トーク／パシング方式と同様に、全局の総
合のデータ伝送量が少ない時に実効的な伝送速度が低い
。In the third method, when transmitting a data signal to a communication medium, it is necessary to wait for the time allotted to the own station's terminal device. The effective transmission speed is low when there is little.
本発明は、このような問題点に鑑みて為されたもので、
全局の端末装置総合のデータ伝送量が少ない時により高
い実効伝送速度が得られ、かつ全局の総合のデータ転送
量が多大なる時に、前記第１の方法より高い実効転送速
度が得られるデータ伝送方法を提供することを目的とす
る。The present invention was made in view of these problems, and
A data transmission method that can obtain a higher effective transmission rate when the total data transmission amount of terminal devices of all stations is small, and that can obtain a higher effective transmission rate than the first method when the total data transmission amount of all stations is large. The purpose is to provide
問題点を解決するだめの手段
本発明は前記問題点を解決するため、通信媒体と、この
通信媒体に接続された複数の端末装置とによりデータ伝
送システムを構築し、前記複数の端末装置を一つの主局
と複数の従局に分け、主局端末装置は自局を含む多数の
局のうち一台を指定して、通信媒体に、データ信号を送
信する許可を与えるためのデータ送信許可信号を一定時
間ごとに順次送信し、さらに、データ送信許可信号を受
けた局の端末装置がデータ信号を送信している間主局端
末装置は次局端末装置のデータ送信許可信号を遅延させ
るという構成を備えたものであ゛る。Means for Solving the Problems In order to solve the above problems, the present invention constructs a data transmission system using a communication medium and a plurality of terminal devices connected to this communication medium, and integrates the plurality of terminal devices. It is divided into one main station and multiple slave stations, and the main station terminal device specifies one of the many stations including its own station and sends a data transmission permission signal to the communication medium to give permission to transmit data signals. The data transmission permission signal is transmitted sequentially at regular intervals, and while the terminal device of the station receiving the data transmission permission signal is transmitting the data signal, the main station terminal device delays the data transmission permission signal of the next station terminal device. It's something I've prepared for.
作用
本発明は上述の構成によって、可能な限り短い一定時間
ごとに、データ送信許可信号を送出しているために、全
局の総合のデータ転送量が少ない時には、通信媒体をデ
ータ信号以外の信号の送信に使用している時間比率が少
ない。すなわち、実動的な伝送速度が高い。Effect of the Invention With the above-described configuration, the present invention sends out a data transmission permission signal at regular intervals as short as possible. Therefore, when the total data transfer amount of all stations is small, the communication medium is not used for signals other than data signals. The proportion of time used for transmission is low. That is, the actual transmission speed is high.
また、全局のデータ伝送量が多大なる時にも、必ず、各
局端末装置に対するデータ送信許可信号が送出されるだ
め実効的な伝送速度の滞りはなく、かつ、送信出来ない
局が発生することはない。In addition, even when the amount of data transmitted by all stations is large, a data transmission permission signal is always sent to each terminal device, so there is no stagnation in the effective transmission speed, and no station is unable to transmit. .
実施例
第１図は本発明の一実施例によるデータの伝送システム
の概略構成を示すものであって、１はデータ信号を各局
に伝送するだめのクープルその他の通信媒体、２は返討
を無くすだめのインピーダンス整合器であるターミネイ
タ、３は通信媒体ｌヘデータ信号を送信するだめの送信
部、４は通信媒体１よりデータ信号を受信するための受
信部、５は各局端末装置へのデータ送信許可信号を発生
するデータ送信許可信号発生部、６は受信した信号がデ
ータ信号かデータ送信許可信号かを判定し、かつ、デー
タ送信許可信号が自局に対するものであるかを判定する
データ送信許可信号判定部、７は受信したデータ送信許
可信号をデータ処理部へ伝達されるのを止めるゲート、
８は、汎用計算機、遠隔コンソール等通信データを処理
するデータ処理部、９はデータ処理部８と通信媒体１と
を結合スルインタフェース部、ｌＯはインタフェース部
と利用装置とからなる局端末装置である。１１はデータ
送信許可信号を送信部へ伝えるデータ送信許可信号送信
路であシ、上述のデータ伝送許可信号発生部５を有する
端末装置が主局端末装置］Ｏａとなり、データ伝送許可
信号発生部５を持たない端末装置は従局端末装置１０ｂ
となる。１２はデータ信号を送信部へ伝えるデータ送信
路、１３は通信媒体１より受信機装置が受信したデータ
信号を各部へ伝えるデータ受信路、１４はデータ送信許
可信号判定部６が発生したデータ送信許可信号発生部５
の動作を一時止める信号を伝えるデータ送信許可信号遅
延信号機、１５はデータ送信許可信号判定部６が発生し
たゲート７をとじる信号を伝える受信データ信号マスク
信号線、１６は判定器が発生したデータ処理部８に通信
媒体ｌへのデータ信号を送信するのを許可する信号を伝
えるデータ送信信号線である。Embodiment FIG. 1 shows a schematic configuration of a data transmission system according to an embodiment of the present invention, in which 1 indicates a couple or other communication medium for transmitting data signals to each station, and 2 indicates a communication medium for eliminating retaliation. 3 is a terminal transmitter for transmitting data signals to communication medium 1; 4 is a receiver for receiving data signals from communication medium 1; 5 is a data transmission permission to each station terminal device; A data transmission permission signal generator 6 generates a signal, and a data transmission permission signal 6 determines whether the received signal is a data signal or a data transmission permission signal, and determines whether the data transmission permission signal is for the own station. a determining unit; 7 is a gate for stopping the received data transmission permission signal from being transmitted to the data processing unit;
8 is a data processing unit that processes communication data such as a general-purpose computer or a remote console; 9 is an interface unit that connects the data processing unit 8 and the communication medium 1; and IO is a station terminal device consisting of an interface unit and a utilization device. . Reference numeral 11 denotes a data transmission permission signal transmission path for transmitting a data transmission permission signal to the transmitting section, and the terminal device having the data transmission permission signal generating section 5 described above is the main station terminal device Oa, and the data transmission permission signal generating section 5 A terminal device that does not have a slave terminal device 10b
becomes. 12 is a data transmission path that transmits a data signal to the transmitter; 13 is a data reception path that transmits a data signal received by the receiver device from the communication medium 1 to each component; and 14 is a data transmission permission signal generated by the data transmission permission signal determination unit 6. Signal generator 5
15 is a received data signal mask signal line that conveys a signal to close the gate 7 generated by the data transmission permission signal determination section 6; 16 is a data processing signal generated by the determination device; This is a data transmission signal line that conveys a signal that allows the unit 8 to transmit a data signal to the communication medium l.
データ送信許可信号判定部６は、データ送信許可信号が
自局に対するものであれば、データ処理部８に送信を許
可する信号を発生すると共にデータ送信許可信号をデー
タ処理部へ伝達するのを防ぐ信号を発生し、また、デー
タ受信中はデータ送信許可信号を発生させない（即ち一
定時間遅延させる）信号を発する。If the data transmission permission signal is directed to the own station, the data transmission permission signal determination unit 6 generates a signal that allows the data processing unit 8 to transmit, and prevents the data transmission permission signal from being transmitted to the data processing unit. It also generates a signal that does not generate a data transmission permission signal (that is, delays it for a certain period of time) while data is being received.
以上のように構成されたデータ通信システムについて以
下その動作を説明する。The operation of the data communication system configured as described above will be explained below.
主局となった局のデータ信号送信許可信号発生器５が、
一定時間Ｔｌごとに各局に対するデータ信号送信許可信
号を発生し、これを送信器装置３が通信媒体１へ送信す
る。このデータ信号送信許可信号を主局を含むすべての
局ｌＯの受信機装置４が受信し、これをデータ送信許可
信号判定部６に伝え、データ送信許可信号判定部６は受
信データ信号マスク信号路を通じてゲート７を閉じてデ
ータ信号送信許可信号を利用装置８に伝えるのを防ぐ。The data signal transmission permission signal generator 5 of the station that has become the main station,
A data signal transmission permission signal is generated for each station at regular intervals Tl, and the transmitter device 3 transmits this to the communication medium 1. This data signal transmission permission signal is received by the receiver devices 4 of all stations 10 including the main station, and is transmitted to the data transmission permission signal determining section 6, which passes the received data signal mask signal path. The gate 7 is closed to prevent the data signal transmission permission signal from being transmitted to the utilization device 8.
一方データ送信許可信号判定部６はデータ信号送信許可
信号が自局宛かを判定し、自局宛てなければ次のデータ
信号送信許可信号を待つ。自局宛であればデータ信号送
信可信号路１ｂを通して利用装置８にデータ信号の通信
媒体１への送信をうながす３．利用装置８は送信すべき
データがなければこれを無視する。送信するデータがあ
るときは送信器装置３を通して通信媒体１へ送信する。On the other hand, the data transmission permission signal determination section 6 determines whether the data signal transmission permission signal is addressed to the local station, and if it is not addressed to the local station, it waits for the next data signal transmission permission signal. If it is addressed to the local station, prompt the device 8 to transmit the data signal to the communication medium 1 through the data signal transmission enable signal path 1b3. The utilization device 8 ignores this if there is no data to be transmitted. When there is data to be transmitted, it is transmitted to the communication medium 1 through the transmitter device 3.
主局を含む各局は、このデータ信号を受信機装置４を通
してデータ送信許可信号判定部６へ伝える。Each station including the main station transmits this data signal to the data transmission permission signal determining section 6 through the receiver device 4.
このデータ信号が自局宛であると判定した局はゲート７
を開いて利用装置８へ伝える。この時、主局では前記の
動作を行ないつつ、データ送信許可信号判定部６がデー
タ送信許可信号発生部５に対してデータ信号受信の間デ
ータ信号送信許可信号発生を一時止めるための信号を送
信許可信号遅延信号線１１を通して伝える。データ信号
がなくなれば主局のデータ送信許可信号発生部５は引き
続きデータ信号送信許可信号の発生を再開する。The station that determines that this data signal is addressed to its own station uses gate 7.
is opened and transmitted to the device 8 to be used. At this time, while the main station performs the above operations, the data transmission permission signal determining section 6 sends a signal to the data transmission permission signal generating section 5 to temporarily stop generating the data signal transmission permission signal while receiving the data signal. The permission signal is transmitted through the delay signal line 11. When the data signal disappears, the data transmission permission signal generating section 5 of the main station resumes generating the data signal transmission permission signal.
上述の一定時間Ｔ１は最小下記の時間でなくてはならな
い。The above-mentioned fixed time T1 must be at least the following time.
Ｔ１ン （データ送信許可信号発生部５から通信媒体１
までの伝送時間）
± ２×（通信媒体１の一端から片端までの伝送時間）
＋ （通信媒体１から許可信号を受信して利用装置
８にデータ信号送信可信号
が伝わる時間）
＋ （利用装置８が送信可信号を受けてデータを送
信するまでの時間）
＋ （利用装置８から通信媒体１までの時間）
＋ （通信媒体ｌからデータ信号を受信してデータ
送信許可信号発生部５に送
信許可信号遅延信号が入力されるま
での時間）
またデータ送信許可信号発生部５はすべての局に設け、
主局を変えることを行なうのも、データ送信許可信号発
生部５を一局にとどめ主局を固定するのも任意である。T1 (from data transmission permission signal generator 5 to communication medium 1)
(Transmission time from one end to the other end of communication medium 1) + (Time for receiving permission signal from communication medium 1 and transmitting data signal transmission permission signal to utilization device 8) + (Utilization device 8 receives the transmission permission signal and transmits the data) + (time from the device 8 to the communication medium 1) + (receives the data signal from the communication medium 1 and transmits it to the data transmission permission signal generation unit 5) (time until the permission signal delay signal is input) In addition, a data transmission permission signal generation section 5 is provided at every station,
It is optional to change the main station or to keep the data transmission permission signal generator 5 in one station and fix the main station.
発明の効果
以上の説明から明らかなように、本発明は通信媒体に複
数の端末装置を接続して構築したデータ伝送ノステムの
中で、一つの端末装置を主局として残りの端末装置を従
局とした上、主局端末装置から次局の端末装置に短時間
隔でデータ送信許可信号を順次発送し、データ送受信を
している局が存在するときは前記データ送信許可信号の
発送を遅延させるようにしたため、全局については実効
的なデータ伝送速度を上げることができる。また他局の
データ送受信に通信媒体を独占されである局はいつまで
もデータ送信が出来ないといった問題は生じない。Effects of the Invention As is clear from the above explanation, the present invention is a data transmission system constructed by connecting a plurality of terminal devices to a communication medium, in which one terminal device is used as a master station and the remaining terminal devices are used as slave stations. In addition, data transmission permission signals are sequentially sent from the main station terminal device to the next station terminal device at short intervals, and when there is a station that is transmitting and receiving data, the sending of the data transmission permission signal is delayed. Therefore, the effective data transmission speed for all stations can be increased. Furthermore, the problem that a station cannot transmit data indefinitely because the communication medium is monopolized by other stations for data transmission and reception does not occur.
第１図は本発明の一実施例を示すデータ送信ンステムの
概略構成図、第２図は同通信媒体上の信号波形図である
。第３図は各信号のタイミングチャートで局２の端末装
置から局４の端末装置へ、局３の端末装置から局４の端
末装置へそれぞれデータ信号を伝送する時のタイミング
チャートである。
１・・・通信媒体、２・・・タイミングチャート、３・
・・送信部、４・・・受信部、５・・・データ送信許可
信号発生部、６・・データ送信許可信号判定部、７・・
・ゲート、８・・・データ処理部、９ａ・・・主局イン
タフェース部、９ｂ・・・従局インタフェース部、ｌｏ
ａ・・・主局端末装置、Ｊｏｂ・・・従局端末装置、１
１・・・データ送信許可信号送信路、１２・・・データ
信号送信路、１３・・・データ信号受信路、１４・・・
データ送信許可信号遅延信号線、１５・・・受信データ
信号マスク信号線、１６・・・データ送信可信号線、１
７・・・データ送信許可信号、１８・・・データ信号。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第
１図FIG. 1 is a schematic configuration diagram of a data transmission system showing an embodiment of the present invention, and FIG. 2 is a signal waveform diagram on the same communication medium. FIG. 3 is a timing chart of each signal when data signals are transmitted from the terminal device of station 2 to the terminal device of station 4, and from the terminal device of station 3 to the terminal device of station 4, respectively. 1... Communication medium, 2... Timing chart, 3.
... Transmission unit, 4... Receiving unit, 5... Data transmission permission signal generation unit, 6... Data transmission permission signal determination unit, 7...
・Gate, 8...Data processing section, 9a...Main station interface section, 9b...Slave station interface section, lo
a... Master terminal device, Job... Slave terminal device, 1
DESCRIPTION OF SYMBOLS 1...Data transmission permission signal transmission path, 12...Data signal transmission path, 13...Data signal reception path, 14...
Data transmission permission signal delay signal line, 15... Received data signal mask signal line, 16... Data transmission permission signal line, 1
7...Data transmission permission signal, 18...Data signal. Name of agent: Patent attorney Toshio Nakao and one other person Figure 1
Claims (1)
の間でデータの送授を制御するインタフェース部及びデ
ータ処理部を備えた複数局の端末装置とによりデータ伝
送システムを構築し、前記複数局の端末装置のうちの一
局を主局端末装置、残りの他局を従局端末装置とし、主
局端末装置には、自局を含む全局端末装置に対し前記通
信媒体を介してデータの送出許可を与えるデータ送信許
可信号発生部と、このデータ送信許可信号発生部の動作
を禁止する手段とを設ける一方、各局端末装置には、前
記データ送信許可信号が自局宛てのものか否かを判定す
る手段を設け、 主局端末装置は前記データ送信許可信号を短時間隔で各
局端末装置に送付する一方、各局端末装置は受信したデ
ータ送信許可信号が自局宛のものであるか否かを判定し
、自局宛であればデータ処理部に対して通信媒体へのデ
ータの送信を行なわせ、またこの通信媒体へのデータ送
信中においては主局端末装置ではデータ送信許可信号の
発信が禁止されるようにしたことを特徴とするデータ伝
送方法。[Claims] A data transmission system comprising a communication medium and a plurality of terminal devices connected to the communication medium and equipped with an interface section and a data processing section that control data transmission between the communication medium and the communication medium. One of the terminal devices of the plurality of stations is a master terminal device, the remaining stations are slave terminal devices, and the master terminal device has the communication medium for all terminal devices including its own station. A data transmission permission signal generation section that gives permission to send data via The main station terminal device sends the data transmission permission signal to each station terminal device at short intervals, and each station terminal device determines whether the received data transmission permission signal is addressed to its own station. If the data is addressed to the local station, the data processing unit is sent to the communication medium, and while the data is being sent to the communication medium, the main station terminal device A data transmission method characterized in that transmission of a transmission permission signal is prohibited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10234986A JPS62258535A (en) | 1986-05-02 | 1986-05-02 | Data transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10234986A JPS62258535A (en) | 1986-05-02 | 1986-05-02 | Data transmission method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62258535A true JPS62258535A (en) | 1987-11-11 |
Family
ID=14325005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10234986A Pending JPS62258535A (en) | 1986-05-02 | 1986-05-02 | Data transmission method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62258535A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010263571A (en) * | 2009-05-11 | 2010-11-18 | Akibu Holdings:Kk | Network system, host computer, hub device, nic device, and communication method |
-
1986
- 1986-05-02 JP JP10234986A patent/JPS62258535A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010263571A (en) * | 2009-05-11 | 2010-11-18 | Akibu Holdings:Kk | Network system, host computer, hub device, nic device, and communication method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5940399A (en) | Methods of collision control in CSMA local area network | |
| US4819229A (en) | Local area network priority control system | |
| US5740174A (en) | Method and apparatus for performing collision detection and arbitration within an expansion bus having multiple transmission repeater units | |
| US4383315A (en) | Idle time slot seizure and transmission facilities for loop communication system | |
| CA1191918A (en) | Multipoint data communication system with local arbitration | |
| EP0022170A2 (en) | Method of attaining communication of data packets on a local shared bus network and local shared bus network | |
| EP0152013A2 (en) | Synchronous/asynchronous communication system | |
| JPH02156750A (en) | Multiplex access control method and multiplex access control system executing same | |
| US5422885A (en) | Contention free local area network | |
| JPH027743A (en) | Data packet switching device | |
| TW334656B (en) | Modifying a delay times in ethernet network | |
| Mark | Distributed scheduling conflict-free multiple access for local area communication networks | |
| EP0112126A2 (en) | Communication network and method for its use | |
| IE55732B1 (en) | Method and device for selecting one station from a set of stations dialoging with a main station | |
| EP0268664B1 (en) | A method of coupling a data transmitter unit to a signal line and an apparatus for performing the invention | |
| JPS62258535A (en) | Data transmission method | |
| EP0785651A1 (en) | Receiver sharing for demand priority access method repeaters | |
| JPH03268534A (en) | Transmission priority classifying system for csma/cd type network | |
| JPS62107543A (en) | Radio communication equipment | |
| JPS61222345A (en) | Communication system and method with preference | |
| KR950001514B1 (en) | Local area network communications device using common bus | |
| KR0184194B1 (en) | Internal process transmission apparatus using btl logic | |
| JPH0662023A (en) | Polling system | |
| JPS59139742A (en) | Information transfer system | |
| JPS62183638A (en) | Multiple address communication control system in local area network |