Method and apparatus for resolving deadlock of...

H - Electricity – 04 – L

Patent

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H04L 12/56 (2006.01) H04B 10/24 (2006.01) H04J 1/16 (2006.01) H04J 3/14 (2006.01) H04L 1/00 (2006.01) H04L 12/26 (2006.01) H04L 12/28 (2006.01) H04L 12/40 (2006.01) H04L 12/46 (2006.01)

Patent

CA 2483119

A transmission repeater has a function of recovery to normal out of the deadlock state of auto-negotiation sequence between switches. The switches exchange auto-negotiation configuration codes via first and second transmission repeaters for a state transition. The first transmission repeater monitors auto-negotiation configuration codes among data transmitted from the opposed switch, and when detecting more than a predetermined number of configuration codes of auto-negotiation having been transmitted during a given period of time, determines that the auto-negotiation sequence between the switches is at a deadlock, and reports it to the second transmission repeater , which then disconnects optical signals from the sending end of the second transmission repeater to the switch for more than twice the propagation time of signals between the switches, thus resolving the deadlock between the switches.

Un répéteur de transmission a une fonction de rétablissement d'une situation d'impasse d'une séquence d'autonégociation entre des commutateurs. Ces derniers échangent des codes de configuration d'autonégociation par le biais d'un premier et d'un second répéteurs de transmissions pour une transition d'état. Le premier répéteur de transmissions surveille les codes de configuration d'autonégociation parmi les données transmises par le commutateur opposé; lorsqu'il détecte un nombre de codes de configuration plus élevé qu'une valeur prédéterminée, il détermine que la séquence d'autonégociation entre les commutateurs est à une impasse, et signale cette situation au second répéteur de transmissions, qui débranche alors les signaux optiques de son transmetteur du commutateur pour plus que doubler le temps de propagation des signaux entre les commutateurs, ce qui permet de surmonter l'impasse entre ces commutateurs.

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