Loop network connection control method, route exchanging equipment and loop network system

Abstract

This invention provides a kind of loop type network connection controlling method, route exchanging equipment and ring type network system. A node, which belongs to a loop only, is selected at each loop. The port of one loop, which has a selected node, is set to blocking status. Another port of the loop and ports of other loops are set to retransmitting status. Kinds of messages between nodes are sent as protocol message mode. The blocked port only processes the protocol message. When a node discovers that the connection with the adjacent node goes out of order, the node will send failure notification message to other ports on the said loop. The port correlated to the pathological connection will turn to blocking status too. To respond the failure notification message, the selected node on the said loop turns the blocking status port to retransmitting status. Fault detection and recovery of this invention all use distributed processing mode. It can fulfill less than 50ms rearrangement.

Description

technical field [0001] The invention relates to a ring network, in particular to a ring network connection control method, routing switching equipment and a ring network system. Background technique [0002] In the metropolitan area network, the transmission network mainly adopts the ring network architecture. The ring network topology is useful in hierarchical networking, saving line resources (such as optical fibers, cables, etc.), providing flexible and fast protection, simplifying network topology, and simplifying network management. Aspects have advantages that lattice and star schemas cannot fully provide. However, it must provide fast fault recovery capabilities for the data channel, the most critical of which is the protection switching capability of less than 50ms (sub50ms). [0003] At present, SDH (Synchronous Digital Hierarchy) / SONET (Synchronous Optical Network) and MPLS (Multi-Protocol Label Switching) fast rerouting methods are mostly used in the transmission...

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Problems solved by technology

However, it must provide fast fault recovery capabilities for the data channel, the most critical of which is the protection switching capability of less than 50ms (sub50ms)

[0003] At present, SDH (Synchronous Digital Hierarchy)/SONET (Synchronous Optical Network) and MPLS (Multi-Protocol Label Switching) fast rerouting methods are mostly used in the transmission network of the metropolitan area network to provide the protection switching capability of less than 50ms, but there are the following deficiencies: SDH In essence, it is mainly for the transmission platform of TDM (time division multiplexing). When transmitting data, it needs to use mapping technology to encapsulate the data into the SDH/SONET frame structure, which brings mapping overhead and high cost. Only when each device has a synchronous clock capability can the synchronous mapping pointer adjustment be completed; MPLS-based protection technology can provide multiple protection modes of 1+1, 1:1 and 1:N, but complex MPLS signaling needs to be introduced, which may cause Problems leading to the interconnection and intercommunication of multi-vendor equipment

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