JPH02234534A - Contention control system between network tentative master stations - Google Patents
Contention control system between network tentative master stationsInfo
- Publication number
- JPH02234534A JPH02234534A JP5386089A JP5386089A JPH02234534A JP H02234534 A JPH02234534 A JP H02234534A JP 5386089 A JP5386089 A JP 5386089A JP 5386089 A JP5386089 A JP 5386089A JP H02234534 A JPH02234534 A JP H02234534A
- Authority
- JP
- Japan
- Prior art keywords
- master station
- prg
- station
- temporary master
- ring
- 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
- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 238000010926 purge Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 101100244969 Arabidopsis thaliana PRL1 gene Proteins 0.000 description 4
- 102100039558 Galectin-3 Human genes 0.000 description 4
- 101100454448 Homo sapiens LGALS3 gene Proteins 0.000 description 4
- 101150051246 MAC2 gene Proteins 0.000 description 4
- 230000008034 disappearance Effects 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000282376 Panthera tigris Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
Landscapes
- Small-Scale Networks (AREA)
Abstract
Description
【発明の詳細な説明】
【産業上の利用分野〕
本発明はネットワーク・システムに関し、更に詳しくは
，対等分散な制御を行なう複数の端局より成るネットワ
ークにおける仮親局の決定に好適な仮親局間相互の競合
制御方式に関する．〔従来の技術〕
複数の端局からなるネットワークの１例として、従来下
記文献に記載のトークン・リング・ネットワークが知ら
れている．［トークン リング アクセス メリツド
アンド フイジカル レイヤスペシフイケーション』（
“Ｔｏｋｅｎ Ｒｉｎｇ ＡｃｃｅｓｓＭａｔｈｏｄ
ａｎｄ Ｐｈｙｓｉｃａｌ Ｌａｙｅｒ Ｓｐａｃｉｆ
ｉｃａｔｉｏｎｓ”、）ＡＮＳＩ／ＬＥＥＲ Ｓｔａｎ
ｄａｒｄ ８０２，５−１９８５，（ＩＳＯ／ＤＰ８８
０２／５）
上記文献に記載のネットワークは、リング全体の制御、
即ちクロツク供給やトークン管理を司るリング内唯一の
仮親局と、それ以外の仮子局とからなる．
仮親局は，例えば、一定時間に渡ってトークンが検出さ
れない場合，トークンが一時的に消滅したと判断し，伝
送路上の浮遊フレームやフレーム消去残骸等を除去する
ためにはパージ・フレーム（ＰＲＧ）を送出し、該フレ
ームがリング？一巡して戻った後に新たなトークンを生
成するよう動作している．ＰＲＧがリングー巡したか否
かの判断は、受信したＰＲＧの送出元アドレス（Ｓｏｕ
ｒｃｅＡｄｄｒｅｓｓ ： Ｓ Ａ ）のチェックによ
り行なう．自局から送出したＰＲＧを一定時間内に検出
できない場合、仮親局は親局としての権利を放菓し仮子
局となる．
仮子局は、他の局が送出したトークンの到着を監視して
おり，一定時間以上にトークンを検出できない場合、ト
ークン要求フレーム（Ｃｉａｉ脂Ｔｏｋｅｎ ： ＣＬ
Ｔκ）を送出し、仮子局どうしが互いに仮親局になろう
と競合する．この競合は，ＳＡが大きい方のＣ Ｌ −
’１’ Ｋを優先させるようにしているので，最大ア
ドレスの端局が新規に仮親局になる．〔発明が解決しよ
うとする課題〕
上記従来技術は，複数のリング・ネットワークを結合し
て、ひとつのリング・ネットワークを形成する場合の動
作について充分に配慮されておらず次の問題がある．
即ち，複数のリングを物理的に接続し、ひとつの大きな
リングを形成する場合，リレー（スイッチ）操作により
，伝送路上を中継されるデータに数ミリ秒の乱れが生じ
る。この乱れはトークンの消滅異常を発生させる。各リ
ングに存在する仮親局は、トークンを一定時間に渡って
検出できないことにより．ＰＲＧを送出して伝送路上の
消去残骸等のゴミを除去しようとする．問題は、各仮親
局がＰＲＯを送出したことにより，互いにＰＲＧのリン
グ一巡を阻げ、このため新しいリングでの仮親局の決定
が遅れることにある．仮親局が決定されない限り，各局
の通信は再開されない．Ｉｌｊｌ働中のリングの結合に
おいては、通信機能の中断時間を短くすることが重要で
あり、このため仮親局の決定も迅速に行なう必要がある
。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a network system, and more particularly, to a network system between temporary master stations suitable for determining a temporary master station in a network consisting of a plurality of terminal stations that perform equally distributed control. Concerning mutual competition control methods. [Prior Art] As an example of a network consisting of a plurality of terminal stations, a token ring network described in the following document is conventionally known. [Token Ring Access Merit]
and Physical Layer Specification” (
“Token Ring Access Method
and Physical Layer Space
cations”,) ANSI/LEER Stan
dard 802, 5-1985, (ISO/DP88
02/5) The network described in the above document controls the entire ring,
In other words, it consists of a temporary master station, the only one in the ring, which handles clock supply and token management, and other temporary slave stations. For example, if a token is not detected for a certain period of time, the temporary master station determines that the token has temporarily disappeared, and sends a purge frame (PRG) to remove floating frames and frame erased debris on the transmission path. Is the frame a ring? It operates to generate a new token after going around and returning. Judgment as to whether or not a PRG has made a ring trip is based on the source address (Sou) of the received PRG.
This is done by checking rceAddress: S A ). If the PRG sent from the own station cannot be detected within a certain period of time, the temporary master station relinquishes its rights as the master station and becomes a temporary slave station. A temporary slave station monitors the arrival of tokens sent by other stations, and if it cannot detect a token for a certain period of time, it sends a token request frame (Ciai Token: CL).
Tκ), and the temporary slave stations compete with each other to become the temporary master station. This competition is based on CL −
Since '1' K is given priority, the terminal station with the largest address becomes the new temporary master station. [Problems to be Solved by the Invention] The above-mentioned conventional technology does not give sufficient consideration to the operation when a plurality of ring networks are combined to form one ring network, resulting in the following problem. That is, when multiple rings are physically connected to form one large ring, a relay (switch) operation causes a disturbance of several milliseconds in the data relayed on the transmission path. This disturbance causes a token disappearance anomaly. The temporary master station that exists in each ring is unable to detect the token for a certain period of time. Attempts to remove erased debris and other debris on the transmission path by sending PRG. The problem is that each temporary master station sends a PRO, which prevents each PRG from going around the ring, which delays the determination of the temporary master station on a new ring. Communication between each station will not be resumed unless a temporary master station is determined. When connecting rings while Iljl is in operation, it is important to shorten the interruption time of the communication function, and therefore it is necessary to quickly determine the temporary master station.
本発明の目的は、複数のリングを結合しネットワークを
拡張する場合の仮親局の決定を早め、ネットワークの通
信機能の中断時間を短縮することにある．
〔課題を解決するための手段〕
上記目的を達成するために、本発明では、円｛Ｇの送信
及び受信の制御においても競合制御を行なうようにした
ことを特徴とする．
例えば、ＰＲＧの受信においても、前記Ｃ Ｌ ’Ｉ’
Ｋの受信同様に，そのＳＡをチェックして競合制御を
行なう．
〔作用〕
仮親局は，通常、リングに唯一だけ存在しているが、複
数のリングをひとつに結合した直後には、各リングに存
在した仮親局が新しいひとつのリングの中で同時に存在
することになる。複数の仮子局から唯一の仮親局を決定
する方法は、前記ＣＬＴＫでの競合制御において既に公
知である．しかし、複数の仮親局をひとつの仮親局と、
それ以外の仮子局とに分けることについては従来知られ
ていな一１．
仮子局は、例えばトークン消滅等リングに異常を検出す
るとＰＲＧを送出し、該ＰＲＧのリング一巡を待つ状態
となる．本発明では、この状態でも｝）Ｒ（３送受信の
競合制御を行なう。An object of the present invention is to speed up the determination of a temporary master station when expanding a network by combining multiple rings, and to shorten the interruption time of network communication functions. [Means for Solving the Problems] In order to achieve the above object, the present invention is characterized in that competition control is also performed in the control of transmission and reception of circle {G. For example, in receiving the PRG, the C L 'I'
Similar to the reception of K, the SA is checked and contention control is performed. [Operation] Normally, only one temporary master station exists in a ring, but immediately after combining multiple rings into one, the temporary master stations that existed in each ring exist simultaneously in one new ring. become. A method for determining a unique temporary master station from a plurality of temporary slave stations is already known in the CLTK contention control. However, if multiple temporary master stations are combined into one temporary master station,
Until now, it has not been known to separate the stations into other temporary slave stations.1. When the temporary slave station detects an abnormality in the ring, such as token disappearance, it sends out a PRG and waits for the PRG to go around the ring. In the present invention, even in this state, })R(3 transmission/reception competition control is performed).
例えば、ＰＲＧのＳＡを用いて競合制御を行なう場合を
考えると、自局（仮親局）のアドレスより大きな値のＳ
Ａを持つＰＲＧを受信した場合、上記仮親局は，より高
優先の他の仮親局が同じリング内に存在すると判断して
仮子局となる．他方、自局アドレスより小さなＳＡのＰ
ＲＧを受信した場合、自局のＰＲＧを持つ状態を維持し
続ける．この待ち状態では、ＰＲＧを連続的に送出し続
けていてもよい．自局アドレスに等しいＰＲＯを受信し
た場合、リングのパージ（ゴミの一掃）を完！したと判
断し、新しいトークンを生成する．上記例ではアドレス
を用いて競合制御を行なう例を示したが，別の情報を用
いることも考えられる．上記目的のために，リング内の
各端局ユニクに設けた識別子や仮親局だけに設けた識別
子を利用してもよい．
〔実施例〕
以下、本発明の実施例を説明する．
第１図はリング・ネットワークの構成を示す．１は二重
リング装置、２は通信制御機構（以ド、ＭＡＣと称す）
，３はスイッチ機構である． ＭＡＣ２は，例えば前記
従来例で述べた文献に記載の物理（Ｐｈｙｓｉｃａｌ）
層及びメディア・アクセス（ＭｓｄｉｕＩＩＡｃｃｅｓ
ｓ Ｃｏｎｔｒｏｌ ： ＭＡＣ）層の制御機能を備え
たものとする．スイッチ機構３は、リング・ネットワー
クが異常の場合，伝送路を折返す（ループバック）こと
により、障害箇所を迂回した新しいリングを形成するた
めのものである．
第１図では，主リング・ネットワーク１０と、従リング
・ネットワーク１１を持つ状態を示しているが、この状
態は例えば次の場合に起り得る，すなわち、二重リング
装置１−Ａと１−Ｂの間の伝送路に障害が発生し、これ
らの装置で伝送路折返しが形成された後，上記障害が復
旧した場合である．この場合、２つの正常ｌリング・ネ
ットワークが存在し、各リングには、当該リングのクロ
ツク同期やトークン管理を行なう仮親局（アクテイヴ・
モニター： Ａｃｔｉｖｅ Ｍｏｎｉｔｏｒ）が存在す
ることになる．例えば、ＭＡＣ２−Ｂｌ及び２−Ａ２が
仮親局であり、他のＭＡＣ２−Ａｌ，２−Ｂ２，２−Ｃ
１及び２−Ｃ２が仮子局（スタンドバイ・モニター：
Ｓｔａｎｄｂｙ Ｍｏｎｉｔｏｒ）である．各ＭＡＣは
仮親局もしくは仮子局となるリング通信端局に相当する
．仮親局を決めるための手順については前記従来例の文
献に記載されている．前記伝送路折返しや折返しを解除
するためには、２重化された両方のリングを監視するこ
と、即ち両方のＭＡＣ、例えば２−Ａ１と２−Ａ２に接
続し、それらの状態を監視する構成制御機構が必要とな
る。本発明はＭＡＣ２の動作に関するものであるため、
構成制御機構の動作に関してはこれ以上述べない．第２
図は，仮親局のリング制御フレームの構成を示す．リン
グ制御フレームとは，例えば前記ｐＲａである．２１は
スタート・デリミタ（Ｓｔａｒｔυｅｌｉｍｉｔａｒ）
、２２は機能識別子（Ｆｕｎｃｔｉｏｎ Ｃｏｄａ）、
２３は宛先ＭＡＣアドレス（Ｄｅｓｔｉｎａｔｉｏｎ
Ａｄｄｒｅｓｓ）、２４は送信元ＭＡＣアドレス（Ｓｏ
ｕｒｃｅ Ａｄｄｒｅｃ＋ｓ）、２５は転送情報（Ｉｕ
ｆｏｒ＋＋＋ａｔｉｏｎ）、２６はフレーム・チェック
部（Ｆｒａｍｅ Ｃｈｅｃｋ Ｓｅｑｕｅｎｃｅ） 、
２ ７はエンド・デリミタ（＋４ｎｄ Ｄｅｌｉｍｉｔ
ｏｒ）である．フレームがＰＲＯであるか否かの識別は
，例えばＦＣ２２の情報値で区別してもよ＜，ＩＮ？’
０２５の中に識別子を含めることもできる。前記従来例
の文献に記載の仕様に従ってもよい．
第３図は．ＭＡＣ２の仮親局競合の動作を示す．例えば
、トークン消滅異常が発生した場合、ＰＲＧ送信最大時
間監視タイマー（Ｔｉｇｅｒ， Ｎｏ Ｔｏｋｓｎ ：
ＴＮＴ）を開始させ（ステップ１００）．ＰＲＧを送信
（１１０）Ｌた後．’Ｉ゛ＮＴタイムアウトか否かをチ
ェックする（１２０）．自アドレス（ＭｙＡｄｄｒｅｓ
ｓ ： Ｍ Ａ ）より大きいＳＡ２４をもつＰＲＧを
受信したなら（１３０）．仮子局となる（１６０）．自
ＭＡＣ送出のＰＲＧを受信したなら（１４０）、仮親局
となり（１５０）、そうでないならｌ’ＲＧ送信を継続
する．
本発明の主要な部分は、ＰＲＧ受信における競合制御（
１３０）にある．仮親局がリングで唯一だと仮定すると
、ＰＲＧを送出するのは該仮親局のみとなって，前記し
たようにＰＲＧのアドレスを比較する必要はない。しか
し、本実施例で述べているように、複数のリングをひと
つに結合することを考えると、リングに複数の仮親局が
存在することになるため、唯一の仮親局を決定するため
の制御が必要となる。もし，前記競合制御（１３０）が
無い場合、リングを結合した影響でトークンが消滅し、
それにより各仮親局からＰＲＧが送出されると、各仮親
局は互いにＰＲＧのリングー巡を防げる．もし，防げな
いとしたら、複数の仮親局が確立してしまう．このため
各仮親局は、自送出ＰＲＧを受信できず、ＴＮＴの間Ｐ
ＲＧを送信し続けた後、仮子局となる．この後、仮子局
間の競合によって仮親局が決定されることになる．第４
図は、前記従来例に記載の従来技術と本発明の関係を示
したものである．動作表現方法は、上記文献での記載方
法（Ｆｉｎｉｔａ Ｓｔａｔａ Ｍａｃｈｉｎｅｄｉａ
ｇｒａｍ ： Ｆ Ｓ Ｔ ）に合せてある．第４図に
おいて，破線で囲った部分が本発明による追加部分であ
る．第５図は，本発明の他の実施例を示す．５０はリン
グ伝送路、５１は通信端局であり，前記ＭＡＣ２に相当
する．５２はリング接続機構である．第６図は上記リン
グ接続機構５２の内部構成を示し、５３はリレー制御機
構、５４はリレー機構である．第７図及び第８図は，本
発明を分り易くするために、上記構成での動作を示した
ものである．６０は仮親局制御フレームであり、例えば
前記ＰＲＯに相当する．ここで，通信端局５１−Ａｌと
５１−Ｂｌが仮親局と仮定する．リング５０−Ａとリン
グ５０−Ｂを結合すると、両仮親局から仮親局制御フレ
ームが選出される．従来技術の範囲では，各仮親局は、
該制御フレーム６０による期待動作の完了をタイムアウ
トによってしか知ることができない．また，タイムアウ
トによって再び仮親局になるようにすると、複数の仮親
局が確立されるおそれがあるため、結果的に仮子局にな
らざるを得なかった（第７図参照）．他方、本発明によ
ると，第８図に示すように，互いに仮親局制御フレーム
６０のリング周回を防げることがなくなるため、リング
で唯一の仮親局が迅速に決定されることになる．
〔発明の効果〕
本発明によれば、仮親局相互の競合制御を行なうように
しているので、リングに複数の仮親局が存在する場合、
リングで唯一の仮親局を迅速に決定できる．
尚，以上の実施例では，本発明をリング・ネットワーク
に適用した場合について述べたが、本発明の基性的な考
え方は、ネットワークのトボロジーには依存しない．従
って、例えばメッシュ状ネットワークの場合、ブロード
キャスト通信を利用したり、論理的にリングに置換した
りするのであれば、上記同様の問題の解決策として本発
明を適用できる．また，唯一の仮親局を特定するのだけ
でなく，複数の仮親局相互間での優先度付けを行なう際
にも適用できる．For example, if we consider the case where contention control is performed using PRG SA, the S
When receiving a PRG with A, the temporary master station determines that another temporary master station with a higher priority exists in the same ring, and becomes a temporary slave station. On the other hand, the SA P smaller than the own station address
When receiving an RG, it continues to maintain its own PRG status. In this waiting state, PRGs may continue to be sent out continuously. If a PRO equal to the own station address is received, the ring purge (cleaning out trash) is completed! It determines that it has, and generates a new token. Although the above example shows an example of controlling contention using addresses, it is also possible to use other information. For the above purpose, an identifier provided for each terminal station in the ring or an identifier provided only for the temporary master station may be used. [Examples] Examples of the present invention will be described below. Figure 1 shows the configuration of the ring network. 1 is a double ring device, 2 is a communication control mechanism (hereinafter referred to as MAC)
, 3 is the switch mechanism. For example, MAC2 is based on the physics described in the literature mentioned in the conventional example.
Layers and Media Accesses (MsdiuIIAcces)
s Control: It shall be equipped with a control function for the MAC layer. The switch mechanism 3 is used to form a new ring that bypasses the failure point by looping back the transmission path when the ring network is abnormal. Although FIG. 1 shows a situation with a primary ring network 10 and a secondary ring network 11, this situation can occur, for example, in the following case: dual ring devices 1-A and 1-B This is a case where a failure occurs in the transmission path between the two devices, and after the transmission path is turned back by these devices, the failure is recovered. In this case, two normal ring networks exist, and each ring has a temporary master station (active master station) that performs clock synchronization and token management for the ring.
Monitor: Active Monitor) will exist. For example, MAC2-Bl and 2-A2 are temporary master stations, and other MAC2-Al, 2-B2, 2-C
1 and 2-C2 are temporary slave stations (standby monitors:
Standby Monitor). Each MAC corresponds to a ring communication terminal that becomes a temporary master station or a temporary slave station. The procedure for determining a temporary master station is described in the conventional literature cited above. In order to cancel the transmission path folding or folding, it is necessary to monitor both of the duplicated rings, that is, to connect to both MACs, for example, 2-A1 and 2-A2, and to monitor their status. A control mechanism is required. Since the present invention relates to the operation of MAC2,
We will not discuss further the operation of the configuration control mechanism. Second
The figure shows the structure of the ring control frame of the temporary master station. The ring control frame is, for example, the pRa mentioned above. 21 is the start delimiter
, 22 is a function identifier (Function Coda),
23 is the destination MAC address (Destination
24 is the source MAC address (So
urce Address+s), 25 is transfer information (Iu
26 is a frame check section (Frame Check Sequence),
2 7 is the end delimiter (+4nd Delimiter
or). Whether a frame is PRO or not can be determined by, for example, the information value of FC22 <, IN? '
An identifier can also be included in 025. The specifications described in the conventional literature may be followed. Figure 3 is. The operation of temporary master station competition in MAC2 is shown. For example, when a token disappearance error occurs, the PRG maximum transmission time monitoring timer (Tiger, No Toksn:
TNT) (step 100). After sending PRG (110)L. 'Check whether or not NT timeout has occurred (120). Own address (MyAddress)
If a PRG with SA24 greater than s : M A ) is received (130). Becomes a temporary slave station (160). If it receives the PRG sent by its own MAC (140), it becomes a temporary master station (150), and if not, it continues l'RG transmission. The main part of the present invention is contention control (
130). Assuming that the temporary master station is the only one in the ring, only the temporary master station sends out the PRG, and there is no need to compare PRG addresses as described above. However, as described in this embodiment, when multiple rings are combined into one, multiple temporary master stations will exist in the ring, so the control for determining the only temporary master station is difficult. It becomes necessary. If there is no contention control (130), the token will disappear due to the effect of combining the rings,
As a result, when PRGs are sent from each temporary master station, each temporary master station can prevent PRGs from ring-hopping to each other. If this cannot be prevented, multiple temporary master stations will be established. For this reason, each temporary master station cannot receive its own transmitted PRG, and during TNT, the
After continuing to transmit RG, it becomes a temporary slave station. After this, the temporary master station will be determined by competition between the temporary slave stations. Fourth
The figure shows the relationship between the prior art described in the prior art example and the present invention. The motion expression method is the method described in the above document (Finita Stata Machinedia
gram: FST). In Fig. 4, the part surrounded by broken lines is the added part according to the present invention. FIG. 5 shows another embodiment of the present invention. 50 is a ring transmission path, and 51 is a communication terminal station, which corresponds to the MAC2. 52 is a ring connection mechanism. FIG. 6 shows the internal structure of the ring connection mechanism 52, where 53 is a relay control mechanism and 54 is a relay mechanism. 7 and 8 show the operation of the above configuration in order to make the present invention easier to understand. 60 is a temporary master station control frame, which corresponds to the PRO mentioned above, for example. Here, it is assumed that the communication terminal stations 51-Al and 51-Bl are temporary master stations. When ring 50-A and ring 50-B are combined, temporary master station control frames are selected from both temporary master stations. Within the scope of the prior art, each temporary master station:
Completion of the expected operation by the control frame 60 can only be known by a timeout. Furthermore, if the station were to become a temporary master station again due to a timeout, there was a risk that multiple temporary master stations would be established, so the station had no choice but to become a temporary slave station (see Figure 7). On the other hand, according to the present invention, as shown in FIG. 8, since it is no longer possible to prevent the temporary master station control frame 60 from circulating around the ring, the only temporary master station in the ring can be quickly determined. [Effects of the Invention] According to the present invention, since competition control is performed between temporary master stations, when a plurality of temporary master stations exist in the ring,
The only temporary master station in the ring can be quickly determined. In the above embodiments, the present invention was applied to a ring network, but the basic idea of the present invention does not depend on the topology of the network. Therefore, for example, in the case of a mesh network, if broadcast communication is used or logically replaced with a ring, the present invention can be applied as a solution to the same problem as above. In addition, it can be applied not only to identifying the only temporary master station, but also to prioritizing multiple temporary master stations.
第１図は本発明の一実施例を示す二重リング・ネットワ
ークの構成図、第２図は仮親局のリング制御フレームの
構成図、第３図は仮親局の競合を含む動作フローチャー
ト、第４図は従来技術との比較（位置付け）のための説
明図，第５図は本発明の他の構成での実施例を示す図、
第６図は第５図におけるスイッチ５２の構成図，第７図
は従来技術での動作を説明するための図、第８図は本発
明の適用による仮親局の決定を示す図である。
１・・・２重リング装置、２・・・通信制御機構、３・
・・スイッチ機構，１０・・・主リングネットワーク，
１１・・・従リングネットワーク．
猶
因
犠 ２Ｉ２ｌ
第
図
拓
図
第
因
猶
図
遁
目
猶
げ
記FIG. 1 is a configuration diagram of a dual ring network showing an embodiment of the present invention, FIG. 2 is a configuration diagram of a ring control frame of a temporary master station, FIG. 3 is an operation flowchart including competition between temporary master stations, and FIG. The figure is an explanatory diagram for comparison (positioning) with the prior art, and FIG. 5 is a diagram showing an example of another configuration of the present invention.
FIG. 6 is a block diagram of the switch 52 in FIG. 5, FIG. 7 is a diagram for explaining the operation in the prior art, and FIG. 8 is a diagram showing determination of a temporary master station according to the present invention. DESCRIPTION OF SYMBOLS 1...Double ring device, 2...Communication control mechanism, 3.
... Switch mechanism, 10... Main ring network,
11...Slave ring network. Yuin Saku 2I2l Figure 1
Claims (1)
局のうちから仮親局を特定する通信ネットワークにおい
て、仮親局は、前記ネットワークの管理用に送出する管
理フレームに当該仮親局個有の識別子を与え、管理フレ
ームを受信した仮親局が、前記識別子に基づいて仮親局
の優先度を判断し、該判断結果に応じて自局での動作を
決定するようにしたことを特徴とするネットワーク仮親
局相互間の競合制御方式。1. In a communication network that connects multiple terminal stations that perform equal control and identifies a temporary master station from among these terminal stations, the temporary master station includes information unique to the temporary master station in the management frame sent out for managing the network. The temporary master station that receives the management frame determines the priority of the temporary master station based on the identifier, and determines the operation of its own station according to the determination result. Contention control method between network temporary master stations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5386089A JPH02234534A (en) | 1989-03-08 | 1989-03-08 | Contention control system between network tentative master stations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5386089A JPH02234534A (en) | 1989-03-08 | 1989-03-08 | Contention control system between network tentative master stations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02234534A true JPH02234534A (en) | 1990-09-17 |
Family
ID=12954531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5386089A Pending JPH02234534A (en) | 1989-03-08 | 1989-03-08 | Contention control system between network tentative master stations |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02234534A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004350297A (en) * | 2003-05-23 | 2004-12-09 | Thomson Licensing Sa | Automatic assignment method for common identifier and device of first node in network |
| US7421479B2 (en) | 1999-04-06 | 2008-09-02 | Sony Corporation | Network system, network control method, and signal sender/receiver |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856548A (en) * | 1981-09-30 | 1983-04-04 | Hitachi Ltd | Selecting method of master station for ring communication line |
| JPS58171150A (en) * | 1982-03-31 | 1983-10-07 | Fujitsu Ltd | Communication system equivalent to loop |
| JPS62214747A (en) * | 1986-03-17 | 1987-09-21 | Fujitsu Ltd | Local area network |
| JPS6398243A (en) * | 1986-10-15 | 1988-04-28 | Hitachi Ltd | Control system for contention in loop shaped transmission line |
-
1989
- 1989-03-08 JP JP5386089A patent/JPH02234534A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856548A (en) * | 1981-09-30 | 1983-04-04 | Hitachi Ltd | Selecting method of master station for ring communication line |
| JPS58171150A (en) * | 1982-03-31 | 1983-10-07 | Fujitsu Ltd | Communication system equivalent to loop |
| JPS62214747A (en) * | 1986-03-17 | 1987-09-21 | Fujitsu Ltd | Local area network |
| JPS6398243A (en) * | 1986-10-15 | 1988-04-28 | Hitachi Ltd | Control system for contention in loop shaped transmission line |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7421479B2 (en) | 1999-04-06 | 2008-09-02 | Sony Corporation | Network system, network control method, and signal sender/receiver |
| US7428589B2 (en) | 1999-04-06 | 2008-09-23 | Sony Corporation | Network system, network control method, and signal sender/receiver |
| US7433927B2 (en) | 1999-04-06 | 2008-10-07 | Sony Corporation | Network system, network control method, and signal sender/receiver |
| JP2004350297A (en) * | 2003-05-23 | 2004-12-09 | Thomson Licensing Sa | Automatic assignment method for common identifier and device of first node in network |
| JP4638691B2 (en) * | 2003-05-23 | 2011-02-23 | トムソン ライセンシング | Method for automatically assigning common identifier and device as first node in network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7440397B2 (en) | Protection that automatic and speedily restore of Ethernet ring network | |
| JP4074631B2 (en) | Transmission path system, frame transmission apparatus in the system, and transmission path switching method | |
| RU2420899C2 (en) | Double-ring network system and method of controlling communication in said network, transmission station and programme for transmission stations | |
| US4709365A (en) | Data transmission system and method | |
| JP4527447B2 (en) | Network relay device and control method thereof | |
| JP2007060184A (en) | Network repeating installation and its control method | |
| US6810452B1 (en) | Method and system for quarantine during bus topology configuration | |
| EP0383264B1 (en) | Method and apparatus for testing station address in network | |
| JPH0998180A (en) | Fault avoid control method for ring network system | |
| JPH02234534A (en) | Contention control system between network tentative master stations | |
| JP2630283B2 (en) | Orderwire communication control method for ring network system | |
| JP4585560B2 (en) | Network failure detection method, data communication network system, and node device | |
| JP2002016664A (en) | Loopback test method and device | |
| JPS60246148A (en) | Data transmission control system | |
| JP2821221B2 (en) | How to test network systems and duplicate addresses | |
| JP4653800B2 (en) | Transmission path system, frame transmission apparatus, transmission path switching method and program in transmission path system | |
| JPH0818590A (en) | Loop communication system | |
| JP3133172B2 (en) | Multi-wave ring LAN fault management system | |
| JPS6021651A (en) | Network system | |
| JPH06112964A (en) | Loop controller and its automatic changeover method in token loop lan | |
| JPH01206755A (en) | Node device | |
| JPS61253950A (en) | Network control system | |
| JPS61158240A (en) | Ras control system of loop network system | |
| JP2000316017A (en) | Optical dual loop network system | |
| JPH0236635A (en) | Transmission control system for token bus network |