JPH05268220A - Network connecting method - Google Patents

Network connecting method

Info

Publication number
JPH05268220A
JPH05268220A JP4063496A JP6349692A JPH05268220A JP H05268220 A JPH05268220 A JP H05268220A JP 4063496 A JP4063496 A JP 4063496A JP 6349692 A JP6349692 A JP 6349692A JP H05268220 A JPH05268220 A JP H05268220A
Authority
JP
Japan
Prior art keywords
lan
transmission
branch
line
trunk
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
JP4063496A
Other languages
Japanese (ja)
Other versions
JP2714309B2 (en
Inventor
Hiroshi Tomizawa
宏 富沢
Masakazu Okada
政和 岡田
Kunihito Kataoka
邦仁 片岡
Kohei Watanabe
幸平 渡辺
Junji Fukuzawa
淳二 福沢
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.)
Hitachi Ltd
Hitachi Information and Control Systems Inc
Original Assignee
Hitachi Ltd
Hitachi Process Computer Engineering Inc
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 Hitachi Ltd, Hitachi Process Computer Engineering Inc filed Critical Hitachi Ltd
Priority to JP4063496A priority Critical patent/JP2714309B2/en
Publication of JPH05268220A publication Critical patent/JPH05268220A/en
Application granted granted Critical
Publication of JP2714309B2 publication Critical patent/JP2714309B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To prevent a traffic from unnecessarily increasing and to improve transmission efficiency by classifying a stay LAN at every independent communication system, dividing the transmission frame inside of a trunk LAN into plural corresponding areas and assigning the respective areas to corresponding stay LAN groups. CONSTITUTION:The node 1 of a trunk LAN transmission line 2 is connected to the stay LAN 3 and the stay LAN 4 which are different in communication forms, a network controller 5 controls a whole system and the respective stays LAN independently execute communication so as to constitute the system. The respective stays LAN control connection between the node 1 and the transmission line 2 and transmit a packet. The packet is divided and transmitted by riding in the time slot 22 of the transmission frame 25 which is rotating on the transmission line 2. The node 1 receiving this is transferred to the corresponding stay LAN. Therefore, communication between terminals connected inside LAN 3 and 4 has no necessity to be executed with the transmission line 2 so that transmission efficiency is improved.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、LANの結合方法に関
わり、とくに複数の支線LANを基幹LANに接続して
収容するネットワ−ク結合方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a LAN connecting method, and more particularly to a network connecting method for connecting a plurality of branch LANs to a backbone LAN to accommodate them.

【0002】[0002]

【従来の技術】従来からネットワ−ク間を結合する場合
には(1)リピ−タ、(2)ゲ−トウエイ、(3)ブリ
ッジ(4)ル−タ、等の方法が用いられている。リピ−
タはOSIモデルでいう物理層レベルでネットワ−ク間
を結合するものであり、単にケ−ブルの長さを延長する
だけの機能であって全体の伝送負荷量は変わらない。
2. Description of the Related Art Conventionally, methods such as (1) repeater, (2) gateway, (3) bridge (4) router, etc. have been used to connect networks. .. Lippy
The function of the OSI model is to connect the networks at the physical layer level, and is merely a function of extending the length of the cable, and the total transmission load does not change.

【0003】ゲ−トウエイはOSIモデルのアプリケ−
ション層で結合処理されるため、性能向上は期待出来
ず、ネットワ−クはソフトウエアで絶縁された形とな
る。ブリッジはOSIモデルのデ−タリンク層のメディ
ア・アクセス制御(MAC)レベルで結合するものであ
り、また、ル−タはネットワ−ク層レベルで結合するも
のである。
The gateway is an OSI model application.
Since the connection processing is performed in the connection layer, performance improvement cannot be expected, and the network is insulated by software. The bridge connects at the media access control (MAC) level of the data link layer of the OSI model, and the router connects at the network layer level.

【0004】上記ブリッジやル−タではネットワ−ク間
のデ−タのフロ−を制御できるので全体的に効率の良い
デ−タ伝送を行なえる可能性がある。特開昭60−15
2145号公報には、IEEE802.1にて標準化さ
れた2つ以上のネットワ−クを上記ブリッジにより相互
に連結する方法が詳しく開示されている。また、特開昭
61−144148号公報には、1つのネットワ−クを
ブリッジと見做してこれに接続される複数のネットワ−
クが単一のネットワ−クに見えるようにする方法が詳し
く開示されている。
Since the bridge or router can control the flow of data between networks, there is a possibility that efficient data transmission can be performed as a whole. JP-A-60-15
Japanese Patent Publication No. 2145 discloses in detail a method of connecting two or more networks standardized by IEEE 802.1 with each other by the bridge. Further, in JP-A-61-144148, one network is regarded as a bridge, and a plurality of networks connected to the network are considered.
It discloses in detail how to make a network look like a single network.

【0005】上記各従来方法では、ネットワ−クの相互
接続により広域に分散したデ−タを共有できる利点を得
ることができるが、例えば、全端末に同一情報を送るブ
ロ−ドキャスト伝送において、何らかの原因によりこの
負荷が高まるとネットワ−ク全体の負荷が高まり、他の
デ−タが伝送できなくなるブロ−ドキャストスト−ム現
象が発生し、ネットワ−クに接続された計算機や端末が
ダウンするという問題が発生する。
In each of the above-mentioned conventional methods, it is possible to obtain an advantage that data distributed over a wide area can be shared by interconnection of networks. For example, in broadcast transmission in which the same information is sent to all terminals, If this load increases for some reason, the load on the entire network will increase, causing a broadcast storm phenomenon in which other data cannot be transmitted, and the computers and terminals connected to the network are down. The problem occurs.

【0006】上記の問題に対しては、ネットワ−ク全体
を十分に管理する必要があるが、これには限界があるた
め、ネットワ−クの結合装置側で処置する必要性が生じ
る。図9は上記ブリッジを用いたネットワ−クシステム
において、異なったネットワ−ク毎を系統的に分け、F
DDIと称するト−クンパッシング方式の基幹LAN伝
送路2にIEEE802.3国際標準LAN(CSMA
/CD LAN)の支線LAN3とIEEE802.5
国際標準LAN(ト−クンリングLAN)の支線LAN
4を別系統に接続したシステムの構成図である。図9に
おいては、各ネットワ−クのユ−ザにはあたかもそのネ
ットワ−クがのみが存在するように、すなわち単一のネ
ットワ−クのように見えるという特徴があった。
For the above-mentioned problems, it is necessary to manage the entire network sufficiently, but there is a limit to this, and it is necessary to take measures on the coupling device side of the network. FIG. 9 is a network system using the above bridge, in which different networks are systematically divided and F
An IEEE802.3 international standard LAN (CSMA) is used for the trunk LAN transmission line 2 of the token passing system called DDI.
/ CD LAN) branch line LAN3 and IEEE802.5
Branch line LAN of international standard LAN (talking LAN)
It is a block diagram of the system which connected 4 to another system. In FIG. 9, the user of each network has a characteristic that it looks as if only that network exists, that is, it looks like a single network.

【0007】[0007]

【発明が解決しようとする課題】上記図9に示したシス
テムにおいては、送信を要求するステ−ションが基幹L
AN伝送路2上を流れている一つのト−クンを捕らえて
デ−タを送出するとその間は基幹LAN伝送路2がその
支線ネットワ−クに占有され、他の系統のネットワ−ク
がサ−ビスされないという問題があった。本発明の目的
は、図9のように1つのネットワ−クに複数の独立なネ
ットワ−クが接続されるシステムにおいて、あるネット
ワ−クの負荷が高まったり、また、障害が発生したりし
た場合に他のネットワ−クが蒙る上記不具合を解消し、
さらに各ネットワ−クの伝送効率を高めることのできる
ネットワ−ク結合方法を提供することにある。
In the system shown in FIG. 9, the station requesting transmission is the backbone L.
When one token flowing on the AN transmission line 2 is captured and data is transmitted, the backbone LAN transmission line 2 is occupied by the branch line network during that period, and the networks of other systems are served. There was a problem that I was not screwed. An object of the present invention is to provide a system in which a plurality of independent networks are connected to one network as shown in FIG. 9 when the load of a certain network increases or a failure occurs. Solves the above problems that other networks suffer,
Another object of the present invention is to provide a network connection method capable of increasing the transmission efficiency of each network.

【0008】[0008]

【課題を解決するための手段】上記課題を解決するため
に、複数の支線LANを独立な通信系統毎に分類し、幹
線LANの伝送フレ−ム内を上記独立な通信系統のそれ
ぞれに対応する複数のエリアに分割し、上記エリアのそ
れぞれを対応する上記支線LAN群に割り当てるように
する。さらに、上記幹線LANの伝送フレ−ム内のエリ
アのそれぞれのデ−タ容量を各エリアに対応する上記支
線LAN群の予想伝送量に比例して配分するようにす
る。
In order to solve the above-mentioned problems, a plurality of branch LANs are classified for each independent communication system, and the transmission frame of the trunk LAN corresponds to each of the independent communication systems. It is divided into a plurality of areas, and each of the above areas is assigned to the corresponding branch LAN group. Further, the data capacity of each area in the transmission frame of the trunk LAN is distributed in proportion to the expected transmission amount of the branch LAN group corresponding to each area.

【0009】さらに、上記支線LANと幹線LAN伝送
路間で送受信されるデ−タ伝送量を計測して各支線LA
N毎の伝送負荷量を算定し、上記伝送負荷量に応じて上
記各エリアのデ−タ容量を修正するようにする。また、
上記各エリアのデ−タ容量をタイムスロット数により決
定するようにする。
Further, the amount of data transmitted and received between the branch line LAN and the trunk line LAN transmission line is measured to measure each branch line LA.
The transmission load amount for each N is calculated, and the data capacity of each area is corrected according to the transmission load amount. Also,
The data capacity of each area is determined by the number of time slots.

【0010】また、上記複数の支線LANを独立な通信
系統毎に分類し、上記独立な通信系統の支線LANのそ
れぞれの伝送負荷量に応じて上記独立な通信系統の支線
LAN毎に接続される上記幹線LANの伝送フレ−ムの
ル−プ周回数を決定するようにする。さらに、上記支線
LANと幹線LAN伝送路間で送受信されるデ−タ伝送
量を計測して各支線LAN毎の伝送負荷量を算定し、上
記伝送負荷量に応じて上記支線LAN毎に接続される上
記幹線LANの伝送フレ−ムのル−プ周回数を決定する
ようにする。
Further, the plurality of branch lines LAN are classified for each independent communication system, and are connected to each branch line LAN of the independent communication system according to each transmission load amount of the branch line LAN of the independent communication system. The number of loop cycles of the transmission frame of the trunk LAN is determined. Furthermore, the amount of data transmitted / received between the branch line LAN and the trunk line LAN transmission line is measured to calculate the transmission load amount for each branch line LAN, and the connection is made for each branch line LAN according to the transmission load amount. The number of loop cycles of the transmission frame of the trunk LAN is determined.

【0011】[0011]

【作用】独立な通信系統に属する各支線LANは上記幹
線LANの伝送フレ−ム内に割り当てられたエリアを用
いて相互に通信する。また、上記エリアのデ−タ容量は
これを用いる支線LAN群の予想伝送量に比例して配分
される。さらに、上記エリアのデ−タ容量は当該支線L
ANの伝送負荷量に応じてダイナミックに修正される。
また、上記各エリアのデ−タ容量をタイムスロット数に
より決定される。
The branch LANs belonging to independent communication systems communicate with each other using the areas allocated in the transmission frame of the trunk LAN. Further, the data capacity of the above area is distributed in proportion to the expected transmission amount of the branch LAN group using this. Further, the data capacity of the above area is the branch line L
It is dynamically modified according to the AN transmission load.
Also, the data capacity of each area is determined by the number of time slots.

【0012】また他の方法として、独立な通信系統に属
する各支線LANはそれぞれの伝送負荷量に応じて割り
当てられた上記幹線LANの伝送フレ−ムのル−プ周回
数を用いて相互に通信する。また、上記上記幹線LAN
の伝送フレ−ムのル−プ周回数は各支線LAN毎の伝送
負荷量より決定される。
As another method, each branch line LAN belonging to an independent communication system communicates with each other by using the number of loop cycles of the transmission frame of the above-mentioned trunk LAN assigned according to each transmission load amount. To do. In addition, the above-mentioned trunk LAN
The number of loop cycles of the transmission frame is determined by the transmission load amount for each branch LAN.

【0013】[0013]

【実施例】図1は本発明を適用するネットワ−クの構成
図である。幹線(バックボ−ン)LAN伝送路2のノ−
ド1には通信形態の異なる支線LAN3と支線LAN4
が接続され、ネットワ−ク管理装置5によりシステム全
体を管理して各支線LANで独立に通信を行なうように
なっている。
1 is a block diagram of a network to which the present invention is applied. The trunk line (backbone) LAN transmission line 2 node
The branch 1 has a branch line LAN3 and a branch line LAN4 having different communication modes.
Are connected to each other, and the entire network is managed by the network management device 5 so that each branch line LAN communicates independently.

【0014】図2に示すように、各支線LANはノ−ド
1内のブリッジモジュ−ル18、19等により接続さ
れ、ノ−ドコントロ−ラ15はインタ−フェイスバス1
7を介してノ−ド1と幹線LAN伝送路2間の接続を制
御してパケットを伝送する。
As shown in FIG. 2, each branch line LAN is connected by bridge modules 18 and 19 in the node 1, and the node controller 15 is an interface bus 1.
The connection between the node 1 and the main LAN transmission line 2 is controlled via 7 to transmit the packet.

【0015】図3は幹線LAN伝送路2上を周回する伝
送フレ−ム25のフォ−マット図である。上記パケット
は分割されて伝送フレ−ム25のタイムスロット22に
乗せられて伝送され、これを受信したノ−ド1は上記分
割されたパケットを取り出してブリッジモジュ−ル1
8、19等によりこれを対応する支線LANへ転送す
る。
FIG. 3 is a format diagram of the transmission frame 25 circulating on the trunk LAN transmission line 2. The packet is divided and placed in the time slot 22 of the transmission frame 25 for transmission, and the node 1 receiving this packet extracts the divided packet and outputs it to the bridge module 1.
This is transferred to the corresponding branch line LAN by 8, 19, or the like.

【0016】図4はブリッジモジュ−ル18、19等の
ブロック図である。支線LANコントロ−ラ57は支線
LAN58からのパケットを受信し、フィルタリングデ
−タベ−ス(IEEE802.1d MACブリッジに
準拠したフィルタリング機能)56は上記パケットの幹
線LAN伝送路2への転送を選別して上り方向通信バッ
ファ54に格納する。また、トランスミッタ52は上記
上り方向通信バッファ54に格納されたパケットをイン
タ−フェイスモジュ−ルバス17上で伝送フレ−ム25
内に割り当てられたタイムスロット22に分割して幹線
LAN伝送路2へ転送する。
FIG. 4 is a block diagram of the bridge modules 18, 19 and the like. The branch line LAN controller 57 receives the packet from the branch line LAN 58, and the filtering database (filtering function based on the IEEE802.1d MAC bridge) 56 selects transfer of the packet to the trunk line LAN transmission line 2. And stores it in the upstream communication buffer 54. Further, the transmitter 52 transmits the packet stored in the upstream communication buffer 54 to the transmission frame 25 on the interface module bus 17.
The data is divided into the time slots 22 allocated within and transferred to the trunk LAN transmission line 2.

【0017】また、レシ−バ53はノ−ドコントロ−ラ
15により幹線LAN伝送路2からインタ−フェイスモ
ジュ−ルバス17に転送される伝送フレ−ム25のスロ
ット22内の分割されたパケットを取り込む。フィルタ
リングデ−タベ−ス56は上記パケットを選別して下り
方向バッファ55に格納し、支線LANコントロ−ラ5
7はこれを支線LAN58に転送する。以上のようにし
て、支線LAN58と幹線LAN伝送路2間のパケット
の授受が行なわれる。
Further, the receiver 53 takes in the divided packets in the slots 22 of the transmission frame 25 transferred from the main LAN transmission line 2 to the interface module bus 17 by the node controller 15. .. The filtering database 56 selects the above packets and stores them in the downstream buffer 55, and the branch line LAN controller 5
7 transfers this to the branch line LAN 58. As described above, packets are exchanged between the branch line LAN 58 and the trunk line LAN transmission line 2.

【0018】図1において、各支線LAN3や同4内に
接続された端末間の通信は各支線LANのそれぞれ毎が
制御するので幹線LAN伝送路2を介して通信する必要
がない。また、例えば支線LAN3をイ−サネットと
し、支線LAN4をト−クンリングとすると、これらの
支線LANはハ−ドウエア、ソフトウエア面で互いに異
なるため支線LAN3と支線LAN4間の通信要求が生
じることは実際上希であり、また、一方に異常が発生す
ると他方への影響が大きいため、通常は支線LAN3間
や支線LAN4間のみで通信が行なわれる。
In FIG. 1, communication between terminals connected to each branch line LAN 3 and 4 is controlled by each branch line LAN, so there is no need to communicate via the trunk LAN transmission line 2. If the branch line LAN3 is an Ethernet and the branch line LAN4 is a token ring, these branch line LANs are different from each other in terms of hardware and software, so that a communication request between the branch line LAN3 and the branch line LAN4 actually occurs. This is extremely rare, and if an abnormality occurs in one of them, the influence on the other is large. Therefore, communication is normally performed only between the branch lines LAN3 and between the branch lines LAN4.

【0019】また、ノ−ド1に同種の支線LANを複数
接続する場合においても、各支線LANに系統の異なる
通信に割り当てて同系統の支線LAN間のみで通信を行
ない、異系統間の通信を禁止する場合が多い。以上のよ
うな状況から、同系統の支線LAN間の通信のみを幹線
LAN伝送路2を介して行なうようにすれば十分であ
る。
Also, when a plurality of branch LANs of the same type are connected to the node 1, each branch LAN is assigned to communication of a different system and communication is performed only between branch LANs of the same system, and communication between different systems is performed. Is often prohibited. From the above situation, it is sufficient to carry out only communication between branch LANs of the same system via the trunk LAN transmission line 2.

【0020】本発明では図5に示すように、伝送フレ−
ム25のタイムスロットをA系エリア31とB系エリア
32分け、例えばA系エリア31を幹線LAN伝送路2
に接続された支線LAN3間の通信に割り当て、B系エ
リア32を同支線LAN4間の通信に割り当てるように
して異系統間の支線LAN間の通信を禁止し、一つのス
テ−ションのデ−タ送出によりその間基幹LAN伝送路
2が占有されるという問題を改善するようにする。
In the present invention, as shown in FIG.
The time slot of the system 25 is divided into the A system area 31 and the B system area 32, and the A system area 31 is, for example, the main LAN transmission line 2
Is assigned to communication between branch lines LAN3 connected to each other, and the B system area 32 is assigned to communication between the same branch line LAN4 to prohibit communication between branch line LANs of different systems, and data for one station. The problem that the backbone LAN transmission line 2 is occupied during the transmission is improved.

【0021】このため、例えば支線LAN3のブリッジ
モジュ−ルはA系エリア31のタイムスロット22にパ
ケットを分割して転送し、A系エリア31内のパケット
のみを取り込むようにする。同様に支線LAN4のブリ
ッジモジュ−ルはB系エリア32内のパケットのみを送
受するようにする。
Therefore, for example, the bridge module of the branch line LAN 3 divides the packet into the time slots 22 of the A-system area 31 and transfers the packet so that only the packet in the A-system area 31 is fetched. Similarly, the bridge module of the branch LAN 4 transmits and receives only the packets in the B-system area 32.

【0022】図6は上記ブリッジモジュ−ルの動作を説
明するフロ−チャ−トである。ブリッジモジュ−ルはス
テップ100にて支線LANからのパケットを受信する
と、ステップ101にてノ−ドコントロ−ラ15が取り
込む伝送フレ−ム25上の自分のエリアを捜し、エリア
が有ればステップ102にてそこに同系統の他のブリッ
ジモジュ−ルのパケットの有無を調べる。他のブリッジ
モジュ−ルのパケットがあればステップ103にて他の
伝送フレ−ムの巡回を待ち、無ければ自己のパケットを
そのタイムスロット上に入れて転送する。
FIG. 6 is a flow chart for explaining the operation of the bridge module. When the bridge module receives the packet from the branch LAN in step 100, it searches its own area on the transmission frame 25 taken in by the node controller 15 in step 101, and if there is an area, it searches in step 102. Check whether there is a packet of another bridge module of the same system there. If there is a packet of another bridge module, it waits for the circulation of another transmission frame in step 103, and if it does not exist, its own packet is put in the time slot and transferred.

【0023】以上により、自己に割り当てられたエリア
による通信のみが行なわれるので、自己のエリアに対す
る他系統支線LANからのパケットの侵入を防止してト
ラフィックの不必要な増加を防止することができ、さら
に各支線LAN上のユ−ザを不要デ−タの処理から開放
してシステムの安全性や運用効率等を向上することがで
きる。
As described above, since communication is performed only in the area allocated to itself, it is possible to prevent the intrusion of packets from the other system branch line LAN into the own area and prevent unnecessary increase of traffic. Furthermore, the safety and operational efficiency of the system can be improved by releasing the user on each branch line LAN from the processing of unnecessary data.

【0023】図7は上記本発明実施例における支線LA
Nのパケットデ−タ割り当てスロット数に対する支線L
AN側から見た性能(パケット/秒)の関係図である。
このようにパケットデ−タ割り当てスロット数に比例し
て支線LANの性能が上がるので、各支線LAN系統毎
の伝送負荷の予想値に基づいてそれぞれの系統にスロッ
ト数を割り当てるようにすれば、システム全体のサ−ビ
スを総合的に高めることができる。
FIG. 7 shows the branch line LA in the embodiment of the present invention.
Branch line L for N packet data allocation slots
It is a relationship diagram of performance (packets / second) viewed from the AN side.
In this way, the performance of the branch LAN increases in proportion to the number of packet data allocation slots. Therefore, if the number of slots is allocated to each branch based on the expected value of the transmission load for each branch LAN, the entire system will be improved. The service of can be comprehensively improved.

【0024】しかし、支線LANの伝送負荷の変動幅が
大きい場合には上記パケットデ−タ割り当てスロット数
をダイナミックに調整しながらシステムを運用する必要
がある。
However, when the fluctuation range of the transmission load of the branch line LAN is large, it is necessary to operate the system while dynamically adjusting the number of packet data allocation slots.

【0025】図8は上記スロット数の調整を行なう場合
のフロ−チャ−トである。ステップ105〜107にて
図1に示したネットワ−ク管理装置5は各支線LAN系
統内のブリッジモジュ−ルが送受するパケット数と廃棄
パケット数とを集計し、ステップ108にて上記パケッ
ト数の集計結果に応じて伝送負荷の過大な支線LANに
はその割り当てスロット数を増やし、伝送負荷の少ない
支線LANにはその割り当てスロット数を減らすように
上記割り当てスロット数を再調整し、ステップ109に
てこれを各ノ−ド1に連絡する。以上の動作により、各
支線LANの伝送負荷の変動に応じてそれぞれのパケッ
トデ−タ割り当てスロット数をダイナミックに調整する
ことができ、システム全体のサ−ビスを効率化すること
ができる。
FIG. 8 is a flow chart when the number of slots is adjusted. In steps 105 to 107, the network management device 5 shown in FIG. 1 totals the number of packets transmitted and received by the bridge modules in each branch LAN system and the number of discarded packets, and in step 108, the number of packets is calculated. The number of allocated slots is readjusted so that the number of allocated slots is increased for branch LANs having an excessive transmission load and the number of allocated slots is decreased for branch LANs having a small transmission load according to the totalization result. This is notified to each node 1. By the above-mentioned operation, the number of packet data allocation slots can be dynamically adjusted according to the fluctuation of the transmission load of each branch LAN, and the service of the entire system can be made efficient.

【0026】また他の方法として、支線LAN3、4等
を独立な通信系統毎に分類し、独立な通信系統の支線L
ANのそれぞれの伝送負荷量に応じて幹線LAN伝送路
2の伝送フレ−ムのル−プ周回数を割り当て、上記独立
な通信系統に属する支線LAN間の通信を上記ル−プ周
回数内で行なうようにしても同様の効果を得る得ること
ができる。このとき、上記ル−プ周回数を各支線LAN
毎のそのときどきの伝送負荷量に応じて決定し、上記ル
−プ周回数を伝送負荷量の変化にダイナミックに追随す
るようにすることもできる。
As another method, the branch lines LAN3, 4 etc. are classified for each independent communication system, and the branch line L of the independent communication system is classified.
The number of loop cycles of the transmission frame of the trunk LAN transmission line 2 is assigned according to the transmission load amount of each AN, and the communication between branch LANs belonging to the above independent communication system is performed within the number of loop cycles. Even if it does, the same effect can be obtained. At this time, the number of loop loops is calculated based on each branch line LAN.
It is also possible to determine each time according to the amount of transmission load at that time, and to dynamically follow the change of the amount of transmission load by the number of loop cycles.

【0027】[0027]

【発明の効果】本発明により、複数の支線LANを基幹
LANに接続して収容するネットワ−クにおいて、各支
線LANは自己に割り当てられた伝送フレ−ム内のエリ
ア、または伝送フレ−ムの幹線周回数を用いる通信のみ
を行ない、他系統支線LANからのパケットの侵入を防
止することができるので、トラフィックの不必要な増加
を防止し、さらに各支線LAN上のユ−ザを不要デ−タ
の処理から開放してシステムの安全性や運用効率等を向
上することができる。
According to the present invention, in a network in which a plurality of branch LANs are connected and accommodated in a backbone LAN, each branch LAN is an area within the transmission frame assigned to itself or a transmission frame. Since communication using only the number of turns of the main line can be performed and the intrusion of packets from the branch LAN of the other system can be prevented, an unnecessary increase in traffic can be prevented, and a user on each branch LAN is unnecessary. It is possible to improve system safety and operation efficiency by releasing the processing from the data processing.

【0028】また、各支線LAN系統毎の伝送負荷の予
想値に基づいてそれぞれの系統に伝送フレ−ム内エリア
のスロット数、または上記伝送フレ−ムの幹線周回数を
割り当て、さらに、各支線LANの伝送負荷の変動に応
じてこれらをダイナミックに調整するので、システム全
体のサ−ビスを総合的に高めることができる。
Further, the number of slots in the area within the transmission frame or the number of laps of the main line of the transmission frame is assigned to each system based on the expected value of the transmission load for each branch line LAN system. Since these are dynamically adjusted according to the fluctuation of the transmission load of the LAN, the service of the entire system can be comprehensively enhanced.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明を適用するネットワ−クの構成図であ
る。
FIG. 1 is a configuration diagram of a network to which the present invention is applied.

【図2】各支線LAN毎に設けられるノ−ドのブロック
図である。
FIG. 2 is a block diagram of a node provided for each branch LAN.

【図3】幹線LAN伝送路2上を周回する伝送フレ−ム
25のフォ−マット図である。
FIG. 3 is a format diagram of a transmission frame 25 circulating on a trunk LAN transmission line 2.

【図4】ブリッジモジュ−ル18、19等のブロック図
である。
FIG. 4 is a block diagram of bridge modules 18, 19 and the like.

【図5】本発明による伝送フレ−ムの構成図である。FIG. 5 is a block diagram of a transmission frame according to the present invention.

【図6】本発明におけるブリッジモジュ−ルの動作を説
明するフロ−チャ−トである。
FIG. 6 is a flowchart for explaining the operation of the bridge module according to the present invention.

【図7】本発明における支線LANのパケットデ−タ割
り当てスロット数に対する支線LAN側から見た性能
(パケット/秒)の関係図である。
FIG. 7 is a relationship diagram of the performance (packets / second) viewed from the branch LAN side with respect to the number of slot data allocation slots of the branch LAN according to the present invention.

【図8】本発明によるスロット数調整のフロ−チャ−ト
である。
FIG. 8 is a flowchart for adjusting the number of slots according to the present invention.

【図9】従来のブリッジを用いたネットワ−クシステム
の構成図である。
FIG. 9 is a configuration diagram of a network system using a conventional bridge.

【符号の説明】[Explanation of symbols]

1…ノ−ド、2…基幹LAN伝送路、3、4、58…支
線LAN、5…ネットワ−ク管理装置、12、13…リ
ピ−タ、14…ロ−カルバス、15…ノ−ドコントロ−
ラ、16…フレ−ム生成部、17…インタ−フェイスモ
ジュ−ルバス、18、19…ブリッジモジュ−ル、22
…タイムスロット、25…伝送フレ−ム、31A系フレ
−ム、32…B系フレ−ム、52…トランスミッタ、5
3…レシ−バ、54…下り方向通信デ−タバッファ、5
5…上り方向通信デ−タバッファ、56…フィルタリン
グデ−タベ−ス、57…支線LANコントロ−ラ。
1 ... Node, 2 ... Core LAN transmission line, 3, 4, 58 ... Branch LAN, 5 ... Network management device, 12, 13 ... Repeater, 14 ... Local bus, 15 ... Node control
La, 16 ... Frame generator, 17 ... Interface module bus, 18, 19 ... Bridge module, 22
... time slot, 25 ... transmission frame, 31A system frame, 32 ... B system frame, 52 ... transmitter, 5
3 ... receiver, 54 ... downlink communication data buffer, 5
5 ... Upstream communication data buffer, 56 ... Filtering database, 57 ... Branch line LAN controller.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 岡田 政和 茨城県日立市大みか町五丁目2番1号 株 式会社日立製作所大みか工場内 (72)発明者 片岡 邦仁 茨城県日立市大みか町五丁目2番1号 日 立プロセスコンピュ−タエンジニアリング 株式会社内 (72)発明者 渡辺 幸平 茨城県日立市大みか町五丁目2番1号 株 式会社日立製作所大みか工場内 (72)発明者 福沢 淳二 神奈川県川崎市麻生区王禅寺1099番地 株 式会社日立製作所システム研究所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masakazu Okada 5-2-1 Omika-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Omika factory, Hitachi, Ltd. (72) Kunihito Kataoka 5-chome, Omika-cho, Hitachi, Ibaraki No. 1 Hiritsu Process Computer Engineering Co., Ltd. (72) Inventor Kohei Watanabe 5-2-1 Omika-cho, Hitachi City, Hitachi, Ibaraki Hitachi Ltd. Omika Plant (72) Inventor Junji Fukuzawa Kawasaki, Kanagawa Prefecture 1099 Ozenji, Aso-ku, Yokohama-shi, Hitachi, Ltd. System Research Laboratory

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 幹線LAN伝送路に複数の支線LANを
接続するネットワ−ク結合方法において、上記複数の支
線LANを独立な通信系統毎に分類し、上記幹線LAN
の伝送フレ−ム内を上記独立な通信系統のそれぞれに対
応する複数のエリアに分割し、上記エリアのそれぞれを
対応する上記支線LAN群に割り当てるようにしたこと
を特徴とするネットワ−ク結合方法。
1. A network coupling method for connecting a plurality of branch LANs to a trunk LAN transmission line, wherein the plurality of branch LANs are classified for each independent communication system, and the trunk LAN is used.
The network connection method is characterized in that the transmission frame is divided into a plurality of areas corresponding to the respective independent communication systems, and each of the areas is assigned to the corresponding branch LAN group. ..
【請求項2】 請求項1において、上記幹線LANの伝
送フレ−ム内のエリアのそれぞれのデ−タ容量を、各エ
リアに対応する上記支線LAN群の予想伝送量に比例し
て配分するようにしたことを特徴とするネットワ−ク結
合方法。
2. The data capacity of each area in the transmission frame of the trunk LAN according to claim 1, wherein the data capacity is distributed in proportion to an expected transmission amount of the branch LAN group corresponding to each area. A network connection method characterized in that
【請求項3】 請求項1において、上記支線LANと幹
線LAN伝送路間で送受信されるデ−タ伝送量を計測し
て各支線LAN毎の伝送負荷量を算定し、上記伝送負荷
量に応じて上記各エリアのデ−タ容量を修正するように
したことを特徴とするネットワ−ク結合方法。
3. A transmission load amount for each branch line LAN is calculated by measuring a data transmission amount transmitted and received between the branch line LAN and a trunk LAN transmission line according to claim 1, and the transmission load amount is calculated according to the transmission load amount. A network coupling method characterized in that the data capacity of each area is corrected.
【請求項4】 請求項1ないし3のいずれかにおいて、
上記各エリアのデ−タ容量をタイムスロット数により決
定するようにしたことを特徴とするネットワ−ク結合方
法。
4. The method according to any one of claims 1 to 3,
A network coupling method characterized in that the data capacity of each area is determined by the number of time slots.
【請求項5】 幹線LAN伝送路に複数の支線LANを
接続するネットワ−ク結合方法において、上記複数の支
線LANを独立な通信系統毎に分類し、上記独立な通信
系統の支線LANのそれぞれの伝送負荷量に応じて上記
独立な通信系統の支線LAN毎に接続される上記幹線L
ANの伝送フレ−ムのル−プ周回数を決定するようにし
たことを特徴とするネットワ−ク結合方法。
5. A network coupling method for connecting a plurality of branch line LANs to a trunk LAN transmission line, wherein the plurality of branch line LANs are classified for each independent communication system and each of the branch line LANs of the independent communication system is classified. The trunk line L connected to each branch line LAN of the independent communication system according to the transmission load amount.
A network coupling method characterized in that the number of loop rounds of an AN transmission frame is determined.
【請求項6】 請求項5において、上記支線LANと幹
線LAN伝送路間で送受信されるデ−タ伝送量を計測し
て各支線LAN毎の伝送負荷量を算定し、上記伝送負荷
量に応じて上記支線LAN毎に接続される上記幹線LA
Nの伝送フレ−ムのル−プ周回数を決定するようにした
ことを特徴とするネットワ−ク結合方法。
6. A transmission load amount for each branch line LAN is calculated by measuring a data transmission amount transmitted and received between the branch line LAN and the trunk line LAN transmission line according to claim 5, and the transmission load amount is calculated according to the transmission load amount. The main line LA connected to each branch line LAN
A network coupling method characterized in that the number of loop rounds of N transmission frames is determined.
JP4063496A 1992-03-19 1992-03-19 Network connection method Expired - Fee Related JP2714309B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4063496A JP2714309B2 (en) 1992-03-19 1992-03-19 Network connection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4063496A JP2714309B2 (en) 1992-03-19 1992-03-19 Network connection method

Publications (2)

Publication Number Publication Date
JPH05268220A true JPH05268220A (en) 1993-10-15
JP2714309B2 JP2714309B2 (en) 1998-02-16

Family

ID=13230914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4063496A Expired - Fee Related JP2714309B2 (en) 1992-03-19 1992-03-19 Network connection method

Country Status (1)

Country Link
JP (1) JP2714309B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008522306A (en) * 2004-12-01 2008-06-26 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Data processing system and method for converting and synchronizing data traffic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008522306A (en) * 2004-12-01 2008-06-26 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Data processing system and method for converting and synchronizing data traffic

Also Published As

Publication number Publication date
JP2714309B2 (en) 1998-02-16

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