JPH0271643A - Local area network - Google Patents
Local area networkInfo
- Publication number
- JPH0271643A JPH0271643A JP63223732A JP22373288A JPH0271643A JP H0271643 A JPH0271643 A JP H0271643A JP 63223732 A JP63223732 A JP 63223732A JP 22373288 A JP22373288 A JP 22373288A JP H0271643 A JPH0271643 A JP H0271643A
- Authority
- JP
- Japan
- Prior art keywords
- power
- lan
- power supply
- frame
- local area
- 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 22
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
Landscapes
- Small-Scale Networks (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
この発明はバス形ローカルエリアネットワークに関し、
特に該ネットワークに接続される装置の電源断状態を装
置自身が検出し、ネットワークに接続される他の装置へ
報知する装置に関するものである。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a bus-type local area network,
In particular, the present invention relates to a device that detects a power-off state of a device connected to the network and notifies other devices connected to the network.
(従来の技術)
第3図(a)は従来のバス形ローカルエリアネットワー
ク(以降LANと略記する)の構成図であり、図におい
て、(1)はデータの伝送媒体、(2)。(Prior Art) FIG. 3(a) is a block diagram of a conventional bus-type local area network (hereinafter abbreviated as LAN), in which (1) is a data transmission medium, and (2) is a data transmission medium.
(3)はLANに接続される装置である。(3) is a device connected to the LAN.
第3図(b)は各装置(2) 、 (3)間で周期的に
転送されるフレームの転送シーケンス図であり、(4)
は装置(2)より装置(3)へ転送されるヘルスチェッ
クフレーム、(5)はヘルスチェックフレーム(4)に
応答して装置(3)から返答される応答フレームを示す
。FIG. 3(b) is a transfer sequence diagram of frames periodically transferred between devices (2) and (3), and (4).
indicates a health check frame transferred from device (2) to device (3), and (5) indicates a response frame returned from device (3) in response to health check frame (4).
次に動作について説明する。バス形LANにおいて各装
置(2) 、 (3)は受動的に伝送媒体(1)に接続
されているため、リモートの装置(この場合装置(3)
と仮定する)が電源断となったことを装置(2)で検知
する必要がある。そのためには、第3図(b)に示す如
く定期的にヘルスチェックフレーム(4)を装置(2)
より装置(3)へ転送し、装置(3)よりヘルスチェッ
クフレーム(4)に応答して一定時間内に応答フレーム
(5)が返って来るか否かを監視することにより、電源
断に至ったか否かを判断してきた。即ち、装置(3)が
電源断であれば、装置(2)から転送されてくるヘルス
チェックフレーム(4)に応答して応答フレーム(5)
を転送することが不可能となる。Next, the operation will be explained. In a bus type LAN, each device (2), (3) is passively connected to the transmission medium (1), so the remote device (in this case device (3))
It is necessary for the device (2) to detect that the power supply (assumed to be ) has been cut off. To do this, it is necessary to periodically send a health check frame (4) to the device (2) as shown in Figure 3(b).
The device (3) then responds to the health check frame (4) and monitors whether or not a response frame (5) is returned within a certain period of time. I have decided whether or not it is true. That is, if the device (3) is powered off, a response frame (5) is sent in response to the health check frame (4) transferred from the device (2).
It becomes impossible to transfer.
(発明が解決しようとする課題〕
従来のLANに接続されている各装置は以上のように、
装置間相互で電源断監視用のフレームを交換し、一定時
間内におけるフレームの応答度に応じて相手装置の電源
断を監視していたため、各装置ともフレーム応答をチエ
ツクし相手装置の状況を更新する等のプログラムが必須
となるので、装置内の当該プログラムによる処理速度の
低下及びオーバーヘッドの増大が起こり、更にネットワ
ーク全体のトラフィックを増大させる等の問題点があっ
た。(Problem to be solved by the invention) As described above, each device connected to a conventional LAN
The devices exchanged frames for power-off monitoring, and the power-off of the other device was monitored according to the degree of frame response within a certain period of time, so each device checked the frame response and updated the status of the other device. Since such programs are required, there are problems such as a decrease in processing speed and an increase in overhead due to the programs in the device, and an increase in the traffic of the entire network.
この発明は上記のような問題点を解消するためになされ
たもので、各装置間で電源断監視用のフレーム交換を行
なわずとも装置の電源断が検知できるローカルエリアネ
ットワークを得ることを目的とする。This invention was made to solve the above-mentioned problems, and its purpose is to provide a local area network that can detect a power outage of a device without exchanging frames for power outage monitoring between each device. do.
(課題を解決するための手段〕
この発明に係るローカルエリアネットワークは、データ
伝送媒体を介して接続され、データ伝送を行なう複数の
ローカルエリアネットワーク装置に、装置の主電源断検
出時に主電源をバックアップすると共に、断検出信号を
出力する副電源機構と、断検出信号入力時に、データ伝
送媒体を介して電源断状態を示すフレームを他のローカ
ルエリアネットワーク装置へ一斉同報する送信制御部を
備えたものである。(Means for Solving the Problems) A local area network according to the present invention provides main power backup to a plurality of local area network devices that are connected via a data transmission medium and perform data transmission when a main power failure of the device is detected. In addition, it is equipped with a sub-power supply unit that outputs a power-off detection signal, and a transmission control unit that simultaneously broadcasts a frame indicating a power-off state to other local area network devices via a data transmission medium when the power-off detection signal is input. It is something.
この発明における副電源機構は、当該装置の主電源断検
出時には、主電源をバックアップすると共に、電源断検
出信号を送信制御部へ送出し、当該装置が電源断に至っ
ていることを報知するフレームを伝送媒体にのせて他の
装置に一斉同報するようにしたものである。When the main power supply of the device is detected, the sub power supply unit in this invention backs up the main power supply, sends a power supply detection signal to the transmission control unit, and sends a frame notifying that the device has reached the power cutoff. It is designed to be broadcast to other devices all at once on a transmission medium.
(実施例)
以下、この発明の一実施例を図について説明する。第1
図(a)において、(101) 〜(103)は本実施
例におけるLAN装置である。同図(b)において、(
6) は装置(101)が電源断に至ったことを他の装
置(102) 、 (103)へ示す遺言の同報フレー
ムである。各LAN装置の内部構成は第2図に示し、同
図において、(7)は装置内における電源、(8)は電
源部(7)に内蔵される主電源、(9)は主電源(8)
が出力低下時に、一定電位以下になったとき主電源(8
) を一定時間バックアップすると共に、遺言フレーム
送出のためのトリガ信号(12)を出力する副電源機構
、(10)はLAN制御部であり、トリガ信号(12)
の受信時に遺言フレームを伝送媒体(1)を介して各L
AN装置へ一斉同報する送信制御部(11)を備えてい
る。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
In Figure (a), (101) to (103) are LAN devices in this embodiment. In the same figure (b), (
6) is a will broadcast frame that indicates to other devices (102) and (103) that the power of the device (101) has been cut off. The internal configuration of each LAN device is shown in Figure 2, in which (7) is the power supply inside the device, (8) is the main power supply built in the power supply section (7), and (9) is the main power supply (8). )
When the output drops and the potential drops below a certain level, the main power supply (8
) for a certain period of time and outputs a trigger signal (12) for sending out a will frame. (10) is a LAN control unit, which outputs a trigger signal (12)
Upon receipt of the Will frame, each L
It includes a transmission control unit (11) that broadcasts to AN devices all at once.
次に上記構成に基づいて本実施例の動作について説明す
る。当該LAN装置(101)の電源が断状態になると
、電源部(7)内の副電源機構(9)は主電源(7)の
出力低下を検知し主電源(8)を一定時間バックアップ
し、且つ伝送媒体(1)に接続される他のLAN装置(
102) 、 (103)へ遺言フレームを送出するこ
とを示すトリガ信号(12)を出力する。このトリガ信
号(12)を受信したLAN制御部(10)内の送信制
御部(11)は予め定義された遺言フレーム(6)を他
のリモートのLAN装置(102) 、 (103)へ
伝送媒体(1)を経由して一斉同報させることにより、
自装置が電源断に至ったことを通知する。Next, the operation of this embodiment will be explained based on the above configuration. When the power of the LAN device (101) is turned off, the sub power supply unit (9) in the power supply unit (7) detects a decrease in the output of the main power supply (7) and backs up the main power supply (8) for a certain period of time. and other LAN devices (
102), outputs a trigger signal (12) indicating that a will frame is to be sent to (103). The transmission control unit (11) in the LAN control unit (10) that received this trigger signal (12) transmits the predefined will frame (6) to other remote LAN devices (102) and (103) through the transmission medium. By broadcasting all at once via (1),
Notifies that the power of the own device has been cut off.
〔発明の効果J
以上のようにこの発明によれば、バス形ローカルエリア
ネットワークに接続される装置内に電源断検知機構と一
定時間の電源バックアップ機構を有しその時間内に当該
装置の電源断を示すフレームを一斉同報するようにした
ので、常時相互を監視するフレームを送出する必要がな
くそのためのプログラム処理を簡単化することができ、
また監視フレームによるネットワーク全体のトラフィッ
クの増大を抑制することができ、より効率良く信頼性の
高いネットワーク管理が行なえる効果がある。[Effect of the Invention J As described above, according to the present invention, a device connected to a bus-type local area network has a power-off detection mechanism and a power backup mechanism for a certain period of time, and the device can be powered off within that time. Since the frames indicating the information are broadcast all at once, there is no need to constantly send out frames that monitor each other, and the program processing for this purpose can be simplified.
Further, it is possible to suppress the increase in traffic on the entire network due to the monitoring frame, and there is an effect that more efficient and reliable network management can be performed.
第1図(a) 、 (b)はこの発明の一実施例による
LAN装置の電源断の時系列を示す図、第2図は本実施
例のLAN装置の内部構成図、第3図(a) 、 (b
)は従来のLAN装置の電源断の時系列を示す図である
。
図において、(1)は伝送媒体、(101)〜(103
)は本発明におけるLAN装置、(6)は遺言フレーム
、(8)は主電源、(9)は副電源機構、(11)は送
信制御部、(12)はトリガ信号である。
なお、図中同一符号は同一または相当部分を示す。FIGS. 1(a) and (b) are diagrams showing the time series of power-off of a LAN device according to an embodiment of the present invention, FIG. 2 is an internal configuration diagram of the LAN device of this embodiment, and FIG. ), (b
) is a diagram showing a time series of power-off of a conventional LAN device. In the figure, (1) is a transmission medium, (101) to (103
) is a LAN device in the present invention, (6) is a will frame, (8) is a main power supply, (9) is a sub power supply unit, (11) is a transmission control unit, and (12) is a trigger signal. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
アネットワーク装置間でデータ伝送を行なうローカルエ
リアネットワークにおいて、上記各ローカルエリアネッ
トワーク装置に、装置の主電源断検出時に主電源をバッ
クアップすると共に、断検出信号を出力する副電源機構
と、断検出信号入力時に、データ伝送媒体を介して電源
断状態を示すフレームを他のローカルエリアネットワー
ク装置に一斉同報する送信制御部とを備えたことを特徴
とするローカルエリアネットワーク。In a local area network that performs data transmission between multiple local area network devices connected via a data transmission medium, each of the local area network devices is provided with main power backup when the main power of the device is detected to be disconnected. It is characterized by comprising a sub-power supply unit that outputs a signal, and a transmission control unit that simultaneously broadcasts a frame indicating a power-off state to other local area network devices via a data transmission medium when a power-off detection signal is input. local area network.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63223732A JPH0271643A (en) | 1988-09-07 | 1988-09-07 | Local area network |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63223732A JPH0271643A (en) | 1988-09-07 | 1988-09-07 | Local area network |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0271643A true JPH0271643A (en) | 1990-03-12 |
Family
ID=16802824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63223732A Pending JPH0271643A (en) | 1988-09-07 | 1988-09-07 | Local area network |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0271643A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5364222A (en) * | 1992-02-05 | 1994-11-15 | Tokyo Electron Limited | Apparatus for processing wafer-shaped substrates |
US5697749A (en) * | 1992-07-17 | 1997-12-16 | Tokyo Electron Kabushiki Kaisha | Wafer processing apparatus |
-
1988
- 1988-09-07 JP JP63223732A patent/JPH0271643A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5364222A (en) * | 1992-02-05 | 1994-11-15 | Tokyo Electron Limited | Apparatus for processing wafer-shaped substrates |
US5697749A (en) * | 1992-07-17 | 1997-12-16 | Tokyo Electron Kabushiki Kaisha | Wafer processing apparatus |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5875290A (en) | Method and program product for synchronizing operator initiated commands with a failover process in a distributed processing system | |
JPH06348528A (en) | Backup switching control method | |
JP3545642B2 (en) | Monitoring system and method | |
JPH0271643A (en) | Local area network | |
JPH09247194A (en) | Lan control system | |
JPH11177550A (en) | Monitor system for network | |
JP2004007930A (en) | System and program for controlling power system monitoring | |
JP2752760B2 (en) | Power control method | |
JP3458371B2 (en) | Data transmission control method and device | |
KR100250888B1 (en) | Network detection device of distributed control system | |
JP3166127B2 (en) | LAN switching system and power system monitoring and control system | |
JP3294256B2 (en) | Data communication method and device | |
JPS6354846A (en) | Controlling equipment for decentralized load communication | |
JPH06152570A (en) | System for system switching processing in duplex data processor | |
JPS6394301A (en) | Plant supervisory and controlling system | |
JPS62226742A (en) | Polling transmission control system | |
JP2699904B2 (en) | Network system | |
JPS63318823A (en) | Trouble detecting system | |
JPS6141248A (en) | Rolling type remote supervisory and controlling equipment | |
JPH1127296A (en) | Network monitoring system | |
JPS625748A (en) | Backup system for fault | |
JPH09160875A (en) | Multi-agent mutual back-up system | |
JPH01240043A (en) | Network supervising system | |
JPH0344134A (en) | Terminal controller | |
JPH02303244A (en) | Transmission system supervising system |