Node system, dual ring communication system using node system, and communication method thereof

摘要

A dual ring communication method using a node system includes: with congestion occurring in a first node system, the first node system generating a congestion information packet and forwarding it to an upper node system positioned in a direction opposed to a direction of forwarding a data packet; a second node system determining whether it is the last node involved in the congestion; adding its congestion information to the congestion information packet and forwarding the congestion information packet to an upper node system when the second node system is not the last node; performing bandwidth allocation for the node systems in other case; and generating a bandwidth allocation packet and transmitting the bandwidth allocation packet to the node systems involved in the congestion.