METHOD AND SYSTEM FOR PROTECTING SWITCHING IN CONTROL PLANE PROTECTION GROUP OF AUTOMATIC SWITCH OPTICAL NETWORK (ASON)

摘要

The invention discloses a method for protecting switching in a control plane protection group of an automatic switch optical network (ASON), and the method includes that: when switching needs to be performed, the control plane of a head node searches an idle protection link in the protection group, issues a time slot cross command comprising all time slot crosses required to be set by the head node to the transmission plane of the head node, and sends a time slot cross request to the control plane of a tail node; the transmission plane of the head node sets the time slot crosses of the head node; the control plane of the tail node edits a corresponding time slot cross command comprising all time slot crosses required to be set by the tail node according to the time slot cross request, and issues the time slot cross command to the transmission plane of the tail node; and the transmission plane of the tail node sets the time slot crosses of the tail node. The invention also discloses a system for protecting switching in a control plane protection group of the ASON. By adopting the method and the system, the protection switching time can be reduced and then the protection switching efficiency can be increased.