JPH0484532A - Atm cell monitor system in atm ring network - Google Patents

Atm cell monitor system in atm ring network

Info

Publication number
JPH0484532A
JPH0484532A JP2197628A JP19762890A JPH0484532A JP H0484532 A JPH0484532 A JP H0484532A JP 2197628 A JP2197628 A JP 2197628A JP 19762890 A JP19762890 A JP 19762890A JP H0484532 A JPH0484532 A JP H0484532A
Authority
JP
Japan
Prior art keywords
atm
ring
atm cell
nodes
transmission path
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.)
Granted
Application number
JP2197628A
Other languages
Japanese (ja)
Other versions
JP2661340B2 (en
Inventor
Koji Tsutsui
筒井 孝司
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 JP2197628A priority Critical patent/JP2661340B2/en
Publication of JPH0484532A publication Critical patent/JPH0484532A/en
Application granted granted Critical
Publication of JP2661340B2 publication Critical patent/JP2661340B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To attain efficient communication between nodes other than a fault occurrence node by defining a storage area for multi-circulation cell identification information in an ATM cell header and monitoring the multi-circulation cell identification information. CONSTITUTION:Priority is placed on nodes 1-1-1-4 on a ring transmission line in advance, and the node (master node) 1-1 having the highest priority on the ring transmission line monitors an ATM cell passing through the ring transmission line. Then the node 1-4 sends an ATM cell addressed to the node 1-2 while setting a code of a specific bit location of the header part to '1'. When an ATM cell reception function of the node 1-2 is faulty, the ATM cell addressed to the node 1-2 from the node 1-4 is circulated on the ring transmission line and when the code of the bit location is '0', the ATM cell is aborted. Thus, even when a fault takes place in the node and the multi-circulation cell is generated, the communication between nodes other than the fault occurrence node is implemented efficiently.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、 A T M (asynchronous
 transl’ermode:非同期転送モード)通
信方式に関し、特に、複数ノードから構成されるATM
リング網の多周口ATMセルの監視方式に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to an ATM (asynchronous
transl'ermode (asynchronous transfer mode) communication system, especially ATM consisting of multiple nodes.
This invention relates to a method for monitoring multi-port ATM cells in a ring network.

[従来の技術] 一般に、ATMリング網は、第3図に示すように、リン
グ状伝送路上に配置された複数のノード1−1〜1−4
を有し、リング状伝送路上では、ATMセル2による通
信方式によりノード間通信を実現する。このATMセル
2は、ヘッダ部3とユーザ情報フィールド4とを有し、
ヘッダ部3に含まれるVPI/VCI  (バーチャル
バス識別子/バーチャルチャンネル識別子)情報(即ち
、宛先ノードを示す宛先ノード情報)によりノード間が
接続される。
[Prior Art] Generally, as shown in FIG. 3, an ATM ring network consists of a plurality of nodes 1-1 to 1-4 arranged on a ring-shaped transmission path.
On the ring-shaped transmission path, inter-node communication is realized using a communication system using ATM cells 2. This ATM cell 2 has a header section 3 and a user information field 4,
The nodes are connected by VPI/VCI (virtual bus identifier/virtual channel identifier) information (that is, destination node information indicating the destination node) included in the header section 3.

[発明が解決しようとする課題] このATMリング網において、今、ノード14からノー
ド1−2宛てのATMセル2が送出された場合、通常、
ノード1−2のみによりこのATMセル2は取り込まれ
、リング状伝送路からこのATMセル2は消える。しか
しながら、ノード]−2の障害などによりノード1−2
がATMセル2を受信できなくなった(取り込めなくな
った)場合、このATMセル2は多周回セルとしてリン
グ状伝送路上を何回も周回することになる。
[Problem to be Solved by the Invention] In this ATM ring network, if the ATM cell 2 destined for the node 1-2 is now sent from the node 14, normally,
This ATM cell 2 is taken in only by node 1-2, and this ATM cell 2 disappears from the ring-shaped transmission path. However, due to a failure of node]-2, etc., node 1-2
When the ATM cell 2 is no longer able to receive (take in) the ATM cell 2, the ATM cell 2 goes around the ring-shaped transmission path many times as a multi-turn cell.

リング状伝送路上は各ノード間の通信手段として共用さ
れ、リング状伝送路上に存在し得るATMセルの数には
限りがあるため、前述のようなケースが発生すると、多
周回セルによって、ノード]−2以外のノード間通信が
妨害されることとなる。
The ring-shaped transmission path is shared as a means of communication between each node, and there is a limit to the number of ATM cells that can exist on the ring-shaped transmission path, so when the above-mentioned case occurs, the nodes Communication between nodes other than -2 will be disrupted.

従って、本発明の課題は、ノードに障害が発生して多周
回セルか発生しても、障害発生ノード以外のノード間で
の通信を邪魔することのないATMセル監視方式を提供
することにある。
Therefore, an object of the present invention is to provide an ATM cell monitoring system that does not interfere with communication between nodes other than the faulty node even if a fault occurs in a node and a cell repeats multiple times. .

[課題の解決するための手段] 本発明によれば、リング状伝送路と、該リング状伝送路
に挿入接続された複数のノードとを有し、該複数のノー
ドの各々は、ATMセルを、そのユーザ情報フィールド
に送るべき情報を含ませると共にそのATMヘッダ内に
宛先ノードを示す宛先ノード情報を含ませた状態で、前
記リング状伝送路へ送出する機能と、該ATMセルを、
前記宛先ノード情報が自ノードを示している時のみ取り
込む機能とを有するATMリング網において、前記AT
Mセルの前記ATMヘッダ内に多周回識別用情報を格納
する領域を定義し、前記複数のノードの各々は、前記A
TMセルを前記リング状伝送路に送出する際に、前記A
TMヘッダ内の前記領域に前記多周回識別用情報を格納
した状態で、前記ATMセルを前記リング状伝送路に送
出する機能を有し、前記複数のノードの予め定められた
一つは、前記リング状伝送路上の前記ATMセルの前記
多周回識別用情報を監視し、該多周回識別用情報を検出
した場合のみ該多周回識別用情報を別の識別用情報に入
れ替えて、該ATMセルを前記リング状伝送路に送出す
る機能と、該別の識別用情報を有する前記ATMセルを
検出した場合のみ、そのATMセルを廃棄する機能とを
有することを特徴とするATMリング網におけるATM
セル監視方式が得られる。
[Means for Solving the Problems] According to the present invention, there is provided a ring-shaped transmission path and a plurality of nodes inserted and connected to the ring-shaped transmission path, and each of the plurality of nodes transmits an ATM cell. , a function of transmitting the ATM cell to the ring-shaped transmission path with the information to be sent included in the user information field and destination node information indicating the destination node included in the ATM header;
In the ATM ring network, the ATM ring network has a function of capturing only when the destination node information indicates the own node.
An area for storing multi-circulation identification information is defined in the ATM header of the M cell, and each of the plurality of nodes
When transmitting the TM cell to the ring-shaped transmission path, the A
The predetermined one of the plurality of nodes has a function of transmitting the ATM cell to the ring-shaped transmission path with the multi-circulation identification information stored in the area in the TM header, and the predetermined one of the plurality of nodes The multi-turn identification information of the ATM cell on the ring-shaped transmission path is monitored, and only when the multi-turn identification information is detected, the multi-turn identification information is replaced with another identification information, and the ATM cell is An ATM in an ATM ring network characterized by having a function of transmitting the ATM cell to the ring-shaped transmission path, and a function of discarding the ATM cell only when the ATM cell having the different identification information is detected.
A cell monitoring method is obtained.

更に本発明によれば、リング状伝送路と、該リング状伝
送路に挿入接続された複数のノードとを有し、該複数の
ノードの各々は、ATMセルを、そのユーザ情報フィー
ルドに送るべき情報を含ませると共にそのATMヘッダ
内に宛先ノードを示す宛先ノード情報を含ませた状態で
、前記リング状伝送路へ送出する機能と、該ATMセル
を、前記宛先ノード情報が自ノードを示している時のみ
取り込む機能とを有するATMリング網において、前記
ATMセルの前記ATMヘッダ内に多周回識別用情報を
格納する領域を定義し、前記複数のノドの各々は、前記
ATMセルを前記リング状伝送路に送出する際に、前記
ATMヘッダ内の前記領域に前記多周回識別用情報を格
納した状態で、前記ATMセルを前記リング状伝送路に
送出する機能と、前記リング状伝送路上の前記ATMセ
ルの前記多周回識別用情報を監視し、該多周回識別用情
報を検出した場合のみ該多周回識別用情報を別の識別用
情報に入れ替えて、該ATMセルを前記リング状伝送路
に送出する入れ替え機能と、該別の識別用情報を有する
前記ATMセルを検出した場合のみ、そのATMセルを
廃棄する廃棄機能とを有し、前記複数のノードの内の予
め定められた一つのみ、前記入れ替え機能及び前記廃棄
機能を動作状態に置き、それ以外のノードは非動作状態
に置くことを特徴とするATMリング網におけるATM
セル監視方式が得られる。
Further, according to the present invention, the present invention includes a ring-shaped transmission path and a plurality of nodes inserted and connected to the ring-shaped transmission path, and each of the plurality of nodes is configured to send an ATM cell to its user information field. a function of transmitting the ATM cell to the ring-shaped transmission path with destination node information indicating the destination node included in the ATM header; In the ATM ring network, an area for storing multi-turn identification information is defined in the ATM header of the ATM cell, and each of the plurality of nodes imports the ATM cell into the ring shape. A function of transmitting the ATM cell to the ring-shaped transmission path with the multi-circulation identification information stored in the area in the ATM header when sending the ATM cell to the ring-shaped transmission path; The multi-turn identification information of the ATM cell is monitored, and only when the multi-turn identification information is detected, the multi-turn identification information is replaced with another identification information, and the ATM cell is connected to the ring-shaped transmission path. and a discarding function that discards the ATM cell only when the ATM cell having the different identification information is detected, and only a predetermined one of the plurality of nodes , an ATM in an ATM ring network, characterized in that the replacement function and the discard function are placed in an active state, and other nodes are placed in an inactive state.
A cell monitoring method is obtained.

この際、前記複数のノードの内の前記予め定められた一
つは、前記複数のノードに予め割り当てられた優先順位
に従い、正常動作するノードのうちの最優先順位のもの
としてもよい。
At this time, the predetermined one of the plurality of nodes may be the one with the highest priority among normally operating nodes according to the priority assigned to the plurality of nodes in advance.

[実施例] 次に1本発明の実施例について図面を参照して説明する
。
[Example] Next, an example of the present invention will be described with reference to the drawings.

第1図は、本発明の一実施例によるATMリング網の構
成例であり、第2図は第3図の場合と同様にノード1−
2が障害となった場合の動作図を示す。
FIG. 1 shows an example of the configuration of an ATM ring network according to an embodiment of the present invention, and FIG.
2 is a diagram showing the operation when the problem occurs.

第1図において、ノード1−4はノード1−2宛てのA
TMセル2−1を送出する。この時、ノド1−4はAT
Mセル2−1のヘッダ部の特定ビット位置の符号を“1
″ (これが多周回識別用情報に相当する)として送出
する。
In FIG. 1, node 1-4 has A for node 1-2.
Sends out TM cell 2-1. At this time, throats 1-4 are AT
Set the code of the specific bit position in the header part of M cell 2-1 to “1”
'' (this corresponds to multi-turn identification information).

ここで、リング状伝送路上のノード1−1〜1−4には
予め優先順位が割り付けられている。ノード]−1がリ
ング状伝送路上で最優先順位を有するノード(以下、親
モード)とすると、親ノード1−1は、リング状伝送路
上を通過するATMセルを監現し、前述のヘッダ部の特
定ビット位置の符号が“]“の場合、これを反転し、“
0′(これが別の識別用情報に相当する)としてリング
状伝送路上にATMセル2−2として送出する。
Here, priorities are assigned in advance to the nodes 1-1 to 1-4 on the ring-shaped transmission path. Node]-1 is the node with the highest priority on the ring-shaped transmission path (hereinafter referred to as parent mode), the parent node 1-1 monitors ATM cells passing on the ring-shaped transmission path, and If the sign of a specific bit position is “]”, invert it and write “
0' (this corresponds to other identification information) and is sent out as an ATM cell 2-2 on the ring-shaped transmission path.

このATMセル2−2は、ヘッダ部の宛先ノード情報(
VP I/VCI)によりノード1−2で受信される。
This ATM cell 2-2 has destination node information (
VP I/VCI) at node 1-2.

今、ノード1−2のATMセル受信機能が障害となった
場合、ノード1−4からノード1−2宛てのATMセル
はリング状伝送路上を周回する。
Now, if the ATM cell reception function of node 1-2 becomes impaired, the ATM cells destined for node 1-2 from node 1-4 circulate on the ring-shaped transmission path.

親ノード1−1はリング状伝送路上を通過するATMセ
ルのヘッダ部の特定ビット位置を監視しており、このビ
ット位置の符号が“0”の場合、このATMセルを廃棄
する。
The parent node 1-1 monitors a specific bit position in the header of an ATM cell passing on the ring-shaped transmission path, and if the code of this bit position is "0", discards this ATM cell.

ノード1−1が障害の場合、上述の多周回識別用情報を
別の識別用情報に入れ替えてATMセルをリング状伝送
路に送出する入れ替え機能と、該別の識別用情報を有す
るATMセルを検出した場合のみ、そのATMセルを廃
棄する廃棄機能とを、他のノードで実行させるため、前
述したようにすべての前記ノードについて予め優先順位
を割り付けておき、ノート1−1以外のノードの内、最
優先順位を有するノードに、前記入れ替え機能と前記廃
棄機能とを実行させる。この際、前記入れ替え機能と前
記廃棄機能とを、すべてのノードに予め持たせておき、
最優先順位のノードのみ前記入れ替え機能及び前記廃棄
機能を動作状態に置き、それ以外のノードの前記入れ替
え機能及び前記廃棄機能は非動作状態に置くようにして
も良い。
If node 1-1 has a failure, there is a replacement function that replaces the above-mentioned multi-circulation identification information with another identification information and sends the ATM cell to the ring-shaped transmission path, and an ATM cell having the other identification information. In order to have another node execute the discard function of discarding the ATM cell only when the ATM cell is detected, priorities are assigned in advance to all the nodes as described above, and , causes the node with the highest priority to execute the replacement function and the discard function. At this time, all nodes are provided with the replacement function and the discard function in advance,
The replacing function and the discarding function may be set to an active state only in the node with the highest priority, and the replacing function and the discarding function of the other nodes may be set to a non-operating state.

[発明の効果] 以上説明したように1本発明は、ATMセルヘッダ内に
多周口セル識別用情報の格納領域を定義し、この多周口
セル識別用情報を監視することにより、リング状伝送路
」二を周回するセルを廃棄することが可能となり、障害
発生ノード以外のノド間ての通信を効率良く行うことが
できる。
[Effects of the Invention] As explained above, the present invention defines a storage area for multi-circuit cell identification information in an ATM cell header, and monitors this multi-circuit cell identification information to create a ring-shaped transmission line. It becomes possible to discard the cells that circulate around the second node, and communication between nodes other than the failed node can be performed efficiently.

略図である。This is a schematic diagram.

1−1〜1−4はノード、2.2−1および22はAT
Mセル、3はヘッダ部、4はユーザ情報フィールド。
1-1 to 1-4 are nodes, 2.2-1 and 22 are AT
M cell, 3 is a header part, 4 is a user information field.

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

Claims (1)

【特許請求の範囲】 1、リング状伝送路と、該リング状伝送路に挿入接続さ
れた複数のノードとを有し、該複数のノードの各々は、
ATMセルを、そのユーザ情報フィールドに送るべき情
報を含ませると共にそのATMヘッダ内に宛先ノードを
示す宛先ノード情報を含ませた状態で、前記リング状伝
送路へ送出する機能と、該ATMセルを、前記宛先ノー
ド情報が自ノードを示している時のみ取り込む機能とを
有するATMリング網において、 前記ATMセルの前記ATMヘッダ内に多周回識別用情
報を格納する領域を定義し、 前記複数のノードの各々は、前記ATMセルを前記リン
グ状伝送路に送出する際に、前記ATMヘッダ内の前記
領域に前記多周回識別用情報を格納した状態で、前記A
TMセルを前記リング状伝送路に送出する機能を有し、 前記複数のノードの予め定められた一つは、前記リング
状伝送路上の前記ATMセルの前記多周回識別用情報を
監視し、該多周回識別用情報を検出した場合のみ該多周
回識別用情報を別の識別用情報に入れ替えて、該ATM
セルを前記リング状伝送路に送出する機能と、該別の識
別用情報を有する前記ATMセルを検出した場合のみ、
そのATMセルを廃棄する機能とを有することを特徴と
するATMリング網におけるATMセル監視方式。 2、リング状伝送路と、該リング状伝送路に挿入接続さ
れた複数のノードとを有し、該複数のノードの各々は、
ATMセルを、そのユーザ情報フィールドに送るべき情
報を含ませると共にそのATMヘッダ内に宛先ノードを
示す宛先ノード情報を含ませた状態で、前記リング状伝
送路へ送出する機能と、該ATMセルを、前記宛先ノー
ド情報が自ノードを示している時のみ取り込む機能とを
有するATMリング網において、 前記ATMセルの前記ATMヘッダ内に多周回識別用情
報を格納する領域を定義し、 前記複数のノードの各々は、 前記ATMセルを前記リング状伝送路に送出する際に、
前記ATMヘッダ内の前記領域に前記多周回識別用情報
を格納した状態で、前記ATMセルを前記リング状伝送
路に送出する機能と、前記リング状伝送路上の前記AT
Mセルの前記多周回識別用情報を監視し、該多周回識別
用情報を検出した場合のみ該多周回識別用情報を別の識
別用情報に入れ替えて、該ATMセルを前記リング状伝
送路に送出する入れ替え機能と、 該別の識別用情報を有する前記ATMセルを検出した場
合のみ、そのATMセルを廃棄する廃棄機能とを有し、 前記複数のノードの内の予め定められた一つのみ、前記
入れ替え機能及び前記廃棄機能を動作状態に置き、それ
以外のノードは非動作状態に置くことを特徴とするAT
Mリング網におけるATMセル監視方式。 3、前記複数のノードの内の前記予め定められた一つは
、前記複数のノードに予め割り当てられた優先順位に従
い、正常動作するノードのうちの最優先順位のものとす
ることを特徴とする請求項2に記載のATMリング網に
おけるATMセル監視方式。
[Claims] 1. A ring-shaped transmission path and a plurality of nodes inserted and connected to the ring-shaped transmission path, each of the plurality of nodes comprising:
A function of transmitting the ATM cell to the ring-shaped transmission path with the information to be sent included in the user information field and destination node information indicating the destination node included in the ATM header; , in an ATM ring network having a function of capturing only when the destination node information indicates the own node, an area is defined in the ATM header of the ATM cell to store multi-circuit identification information, and the plurality of nodes When sending the ATM cell to the ring-shaped transmission path, each of the A
A predetermined one of the plurality of nodes has a function of transmitting a TM cell onto the ring-shaped transmission path, and a predetermined one of the plurality of nodes monitors the multi-circulation identification information of the ATM cell on the ring-shaped transmission path, and Only when multi-turn identification information is detected, the multi-turn identification information is replaced with another identification information, and the ATM
Only when detecting the ATM cell having the function of transmitting the cell to the ring-shaped transmission path and the other identification information,
An ATM cell monitoring system in an ATM ring network, characterized by having a function of discarding the ATM cell. 2. It has a ring-shaped transmission path and a plurality of nodes inserted and connected to the ring-shaped transmission path, and each of the plurality of nodes includes:
A function of transmitting the ATM cell to the ring-shaped transmission path with the information to be sent included in the user information field and destination node information indicating the destination node included in the ATM header; , in an ATM ring network having a function of capturing only when the destination node information indicates the own node, an area is defined in the ATM header of the ATM cell to store multi-circuit identification information, and the plurality of nodes each of which, when sending out the ATM cell to the ring-shaped transmission path,
a function of transmitting the ATM cell to the ring-shaped transmission path with the multi-circulation identification information stored in the area in the ATM header; and a function of transmitting the ATM cell to the ring-shaped transmission path,
The multi-turn identification information of the M cell is monitored, and only when the multi-turn identification information is detected, the multi-turn identification information is replaced with another identification information, and the ATM cell is connected to the ring-shaped transmission path. and a discarding function that discards the ATM cell only when the ATM cell having the different identification information is detected, and only a predetermined one of the plurality of nodes , an AT characterized in that the replacement function and the discard function are placed in an active state, and other nodes are placed in a non-active state.
ATM cell monitoring method in M-ring network. 3. The predetermined one of the plurality of nodes is the one with the highest priority among normally operating nodes according to the priorities assigned in advance to the plurality of nodes. An ATM cell monitoring system in an ATM ring network according to claim 2.
JP2197628A 1990-07-27 1990-07-27 ATM cell monitoring method in ATM ring network Expired - Lifetime JP2661340B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5796720A (en) * 1995-07-05 1998-08-18 Fujitsu Limited Control method of asynchronous data communications
JP2007023509A (en) * 2005-07-12 2007-02-01 Wakai & Co Ltd Construction method of roof accessory fixing bracket and roof accessory tile

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5765038A (en) * 1980-10-09 1982-04-20 Fujitsu Ltd Data monitor system
JPS6141251A (en) * 1984-08-01 1986-02-27 Matsushita Electric Ind Co Ltd Loop network control method
JPS6240845A (en) * 1985-08-16 1987-02-21 Nec Corp Network control right migrating system for communication network system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5765038A (en) * 1980-10-09 1982-04-20 Fujitsu Ltd Data monitor system
JPS6141251A (en) * 1984-08-01 1986-02-27 Matsushita Electric Ind Co Ltd Loop network control method
JPS6240845A (en) * 1985-08-16 1987-02-21 Nec Corp Network control right migrating system for communication network system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5796720A (en) * 1995-07-05 1998-08-18 Fujitsu Limited Control method of asynchronous data communications
JP2007023509A (en) * 2005-07-12 2007-02-01 Wakai & Co Ltd Construction method of roof accessory fixing bracket and roof accessory tile

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