JPH02148935A - Communication equpment - Google Patents

Communication equpment

Info

Publication number
JPH02148935A
JPH02148935A JP30160888A JP30160888A JPH02148935A JP H02148935 A JPH02148935 A JP H02148935A JP 30160888 A JP30160888 A JP 30160888A JP 30160888 A JP30160888 A JP 30160888A JP H02148935 A JPH02148935 A JP H02148935A
Authority
JP
Japan
Prior art keywords
data frame
data
processing
frame
communication
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
Application number
JP30160888A
Other languages
Japanese (ja)
Inventor
Kiyoshi Shimura
清 志村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP30160888A priority Critical patent/JPH02148935A/en
Publication of JPH02148935A publication Critical patent/JPH02148935A/en
Pending legal-status Critical Current

Links

Landscapes

  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To reduce data frame transmission processing and a response frame reception processing time by evading the limit of a data frame length sent from a master station to a slave station when the communication control right of a transmission line is transferred to the master station. CONSTITUTION:When the communication control right of a transmission line 100 is transferred to the communication controller 12 of the master station 10, a split processing inhibit means 15 as a means inhibiting split processing of a data split processing means 13 is included. Then the master station 10 and slave stations 201 - 20n send a data frame by using data transmission processing means 14,24 when the absence of a signal carrier to the transmission line 100 is confirmed. The master station 100 sends a data frame of an optional length subject to arithmetic processing by an information processing unit by using a split processing inhibit means 15 via the communication controller 12 and the transmission line 100 and a replay frame and a request frame to the information processing unit 11 are sent from each slave station 20. Thus, the data frame transmission processing and the replay frame reception processing time are saved.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、CSMD (carrier 5ense 
multipleaccess)方式およびCS M 
D / CD (carrier 5e−nse mu
ltiple access/collision d
etection)方式によるバス型の通信装置に利用
する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a carrier 5ense
multiple access) method and CS M
D/CD (carrier 5e-nse mu
ltiple access/collision d
It is used for bus-type communication devices based on the

〔概要〕〔overview〕

本発明は通信装置において、 主局に伝送路の通信制御権が移管された状態のときには
、主局から従局へ送信するデータフレーム長は制限をし
ないことにより、 主局のデータ分割処理をなくし、データフレーム送信処
理および応答フレーム受信処理の時間を削減でき効率の
良い通信ができるようにしたものである。
The present invention provides a communication device in which when the communication control right of the transmission path is transferred to the master station, the length of the data frame transmitted from the master station to the slave station is not limited, thereby eliminating data division processing in the master station. This allows efficient communication by reducing the time required for data frame transmission processing and response frame reception processing.

〔従来の技術〕[Conventional technology]

従来、バス型の通信装置は、I E E E (Ins
titu−te of Blectrical and
 Electronics Bngineers)80
2、3によるC3MD/CD方式のローカルネリアネッ
トワーク通信装置がある。
Conventionally, bus-type communication devices are IEEE (Ins
The position of Brectrical and
Electronics Bngineers) 80
There is a C3MD/CD type local network communication device according to No. 2 and 3.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかし、このような従来例の通信装置では、通信装置を
構成する局間の相互通信を円滑に行うために、すべての
局に対し、送出するデータフレームのフレーム長は規定
の長さに制限されている。
However, in such conventional communication devices, in order to facilitate mutual communication between the stations that make up the communication device, the frame length of the data frame sent to all stations is limited to a specified length. ing.

これは通信装置を構成する全局を同等としているために
、一つの局が無制限のフレーム長のデータフレームを送
出し伝送路を専有することを防止するための制限である
This is a restriction to prevent one station from monopolizing the transmission path by sending out a data frame with an unlimited frame length since all stations constituting the communication device are made equal.

しかし、現実の通信装置では、1個の主局と複数の従局
との構成の通信装置が多い。特にデータの流れが主局か
ら従局への方向にあり通信の主権が主局にある通信装置
では、上述の送出フレーム長の制限に従った場合に、主
局がフレーム制限長以上のデータを従局に送信する場合
にも、伝送路を専有して主局と従局との間の通信を阻害
する恐れが無いにもかかわらずデータを分割して複数の
フレームに分は送信する必要があるために、1個のフレ
ームでデータを送信する場合に比べて多大のオーバーヘ
ッドによる時間が必要であり、かつ複数のフレームに分
割するための主局での処理が必要な欠点であった。また
従局からの応答フレームに対する受信処理時間も多い欠
点があった。
However, many actual communication devices have a configuration of one master station and a plurality of slave stations. In particular, in a communication device where the data flow is from the master station to the slave station and the master station has the sovereignty of communication, if the above transmission frame length limit is followed, the master station will send data exceeding the frame limit length to the slave station. Even when transmitting data to multiple stations, it is necessary to divide the data and send it in multiple frames, even though there is no risk of monopolizing the transmission path and interfering with communication between the master and slave stations. However, compared to the case where data is transmitted in one frame, a large amount of time is required due to overhead, and processing at the main station is required to divide the data into a plurality of frames. Another drawback is that it takes a long time to process the response frame from the slave station.

本発明は上記の欠点を解決するために、主局のデータ分
割処理をなくし、データフレーム送信処理および応答フ
レーム受信処理時間を削減でき効率の良い通信装置を提
供することを目的とする。
SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks, it is an object of the present invention to provide an efficient communication device that eliminates data division processing in the main station and reduces data frame transmission processing and response frame reception processing times.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、通信装置に右いて、通信制御装置は、主局に
伝送路の通信制御権が移管された状態ではデータ分割処
理手段の分割処理を禁止する手段を含むことを特徴とす
る。
The present invention is characterized in that, in the communication device, the communication control device includes means for prohibiting the data division processing means from performing division processing in a state where the communication control right of the transmission path is transferred to the main station.

〔作用〕[Effect]

主局に伝送路の通信制御権が移管された状態では通信制
御装置は禁止する手段でデータ分割処理手段の分割処理
を禁止することにより、主局のデータ分割処理をなくし
、データフレーム送信処理および応答フレーム受信処理
時間を削減でき効率の良い通信ができる。
When the communication control right of the transmission path has been transferred to the main station, the communication control device uses a prohibiting means to prohibit the data division processing means from performing division processing, thereby eliminating the data division processing of the master station, and preventing the data frame transmission processing and Response frame reception processing time can be reduced and efficient communication can be achieved.

〔実施例〕〔Example〕

本発明の実施例について図面を参照して説明する。図は
本発明一実施例通信装置のブロック構成図である。図に
おいて、通信装置は、情報処理装置11および通信制御
装置12を含む主局10と、通信制御装置12に伝送路
100を介して接続された複数の従局201〜20.、
とを備え、通信制御装置12および従局20.〜20.
.はそれぞれ、伝送路100に信号キャリヤがないこと
を確言忍してからデータフレームを送出するデータフレ
ーム送信処理手段14.24゜〜24□と、送信するデ
ータフレームの°長さが規定値以上の場合にこのデータ
フレームを分割してこのデータフレーム送信処理手段1
4.24.〜24.に与えるデータ分割処理手段13.
23.〜231.とを含む。
Embodiments of the present invention will be described with reference to the drawings. The figure is a block diagram of a communication device according to an embodiment of the present invention. In the figure, the communication device includes a master station 10 including an information processing device 11 and a communication control device 12, and a plurality of slave stations 201 to 20. ,
A communication control device 12 and a slave station 20. ~20.
.. are respectively a data frame transmission processing means 14.24° to 24□ that sends out a data frame after confirming that there is no signal carrier on the transmission path 100, and a data frame transmission processing means 14. In this case, this data frame is divided and this data frame transmission processing means 1
4.24. ~24. Data division processing means 13.
23. ~231. including.

ここで本発明の特徴とするところは、通信制御装置12
に、主局10に伝送路100の通信制御権が移管された
状態では、データ分割処理手段13の分割処理を禁止す
る手段として分割処理禁止手段15を含むことにある。
Here, the feature of the present invention is that the communication control device 12
In addition, when the communication control right of the transmission line 100 is transferred to the main station 10, a division processing prohibition means 15 is included as a means for prohibiting the division processing of the data division processing means 13.

このような構成の通信装置の動作について説明する。図
において、この通信装置は、C3MA方式を採用してお
り、主局10、および従局201〜20゜は、データ送
信処理手段14.24によりデータフレームを伝送路1
00 に送出するときに、伝送路100に他局がデータ
フレームを送出していたいこと、すなわち、伝送路10
0に信号キャリアがないことをm認してからデータフレ
ームを送出する。
The operation of the communication device having such a configuration will be explained. In the figure, this communication device employs the C3MA system, and a master station 10 and slave stations 201 to 20° transmit data frames to a transmission path 1 by data transmission processing means 14.24.
00, another station wants to send a data frame to the transmission path 100.
After confirming that there is no signal carrier at 0, the data frame is sent.

この通信装置では、通信は主局10と各従局20との間
で行われ、従局20間の通信は無い。主局10からは分
割処理禁止手段15により情報処理装置で演算処理され
た任意長のデータフレームが通信制御装置12および伝
送路100を介して各従局20に送信され、各従局20
からは情報処理装置11からのデータフレーム受信の応
答フレームおよび従局20から情報処理装置11への特
別要求のための要求フレームが送信される。各従局20
が送出するデータフレームのフレーム長は、データ分割
処理手段23、〜23゜により主局10の送信処理を極
力阻害しないために規定値以上のフレーム長を越えない
ように規制されている。
In this communication device, communication is performed between the main station 10 and each slave station 20, and there is no communication between the slave stations 20. From the master station 10, a data frame of arbitrary length that has been processed by the information processing device by the division processing prohibition means 15 is transmitted to each slave station 20 via the communication control device 12 and the transmission line 100.
From there, a response frame for receiving a data frame from the information processing device 11 and a request frame for a special request from the slave station 20 to the information processing device 11 are transmitted. Each slave station 20
The frame length of the data frame sent out by the data division processing means 23, .

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明は、通信制御装置でのデー
タ分割処理を省略し、データフレーム送信処理を削減で
き、また、データフレーム送信毎の端末からの応答フレ
ーム受信処理も削減でき大幅な処理時間の短縮が計れる
優れた効果がある。
As explained above, the present invention can omit the data division process in the communication control device, reduce the data frame transmission process, and also reduce the response frame reception process from the terminal for each data frame transmission, resulting in a large amount of processing. It has an excellent effect of reducing time.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明一実施例通信装置のブロック構成図。 11・・・情報処理装置、10・・・主局、13.23
.〜23゜・・・データ分割処理手段、12・・・通信
制御装置、14.24、〜24h・・・データ送信処理
手段、15・・・分割処理禁止手段、20.〜20、・
・・従局、100・・・伝送路。
The figure is a block diagram of a communication device according to an embodiment of the present invention. 11... Information processing device, 10... Main station, 13.23
.. ~23°...Data division processing means, 12...Communication control device, 14.24, ~24h...Data transmission processing means, 15...Division processing prohibition means, 20. ~20,・
...Slave station, 100...Transmission line.

Claims (1)

【特許請求の範囲】 1、通信制御装置を含む主局と、この通信制御装置に伝
送路を介して接続された複数の従局とを備え、 上記通信制御装置および上記複数の従局はそれぞれ、上
記伝送路に信号キャリヤがないことを確認してからデー
タフレームを送出するデータフレーム送信処理手段と、
送信するデータフレームの長さが規定値以上の場合にこ
のデータフレームを分割してこのデータフレーム送信処
理手段に与えるデータ分割処理手段とを含む 通信装置において、 上記通信制御装置は、上記主局に上記伝送路の通信制御
権が移管された状態では上記データ分割処理手段の分割
処理を禁止する手段を含む ことを特徴とする通信装置。
[Claims] 1. A main station including a communication control device, and a plurality of slave stations connected to the communication control device via a transmission path, wherein the communication control device and the plurality of slave stations each have the above-mentioned a data frame transmission processing means for transmitting the data frame after confirming that there is no signal carrier on the transmission path;
In the communication device, the communication control device includes a data division processing means that divides the data frame and provides the data frame transmission processing means to the data frame transmission processing means when the length of the data frame to be transmitted is equal to or greater than a specified value. A communication device comprising: means for prohibiting the data division processing means from performing division processing in a state in which communication control rights of the transmission path have been transferred.
JP30160888A 1988-11-29 1988-11-29 Communication equpment Pending JPH02148935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30160888A JPH02148935A (en) 1988-11-29 1988-11-29 Communication equpment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30160888A JPH02148935A (en) 1988-11-29 1988-11-29 Communication equpment

Publications (1)

Publication Number Publication Date
JPH02148935A true JPH02148935A (en) 1990-06-07

Family

ID=17898995

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30160888A Pending JPH02148935A (en) 1988-11-29 1988-11-29 Communication equpment

Country Status (1)

Country Link
JP (1) JPH02148935A (en)

Similar Documents

Publication Publication Date Title
US4488226A (en) Method and apparatus for high speed asynchronous serial data transfer
JPS6199439A (en) Group address communication system
JPH0239144B2 (en)
JPH02148935A (en) Communication equpment
US6178177B1 (en) Data-processing network having non-deterministic access, but having deterministic access time
JPS60239854A (en) Distributed data processing system
KR0182707B1 (en) Method and apparatus for monitoring communication message between processors in switching system
JP3366274B2 (en) Monitoring control device and monitoring control method
JP2935242B2 (en) Wireless communication system
JP2504478B2 (en) Facsimile storage and switching equipment
JPS6232748A (en) Data transfer equipment
JPS6223649A (en) Network system
JPH0567097B2 (en)
JP3096486B2 (en) Communications system
JPH0418652A (en) Data communication system
JPH02217039A (en) Poling/selecting control procedure system
JPS63149937A (en) Data communication control system
JPH02164155A (en) Communication mode for lan system
JPH054648U (en) Communication I / F circuit
JPH01314326A (en) Communication control system in data processing system
JPH0243845A (en) Data transmission system
JPH0256695B2 (en)
JPH02143631A (en) Supervisory controller
JPS5831785B2 (en) Line polarity control method
JPH02188042A (en) Loop type transmission line communication system