34results about How to "Implement protection switching" patented technology

The invention discloses a time synchronization system and a method with multiple synchronization domains, and a cross-domain device. The method comprises that: a time synchronization network is divided into multiple synchronization domains, the cross-domain devices are deployed among the synchronization domains, synchronization relations are established among the synchronization domains via the cross-domain devices, and transmission of time source information and protection of time sources are performed among the synchronization domains so that time synchronization is realized among the synchronization domains. The invention brings forward a synchronization framework based on the multiple synchronization domains. The time synchronization network is divided into the multiple synchronization domains so that inter-domain intercommunication is realized, inter-domain synchronization relations are established, cross-domain transmission and inter-domain protection of the time source information are realized and inter-domain loops are avoided. Therefore, problems in the prior art that inter-domain intercommunication and inter-domain protection cannot be realized among the multiple synchronization domains in the time synchronization network are solved.

The invention provides an automatic protection switching method. The method includes that a main device where an active link is located and a standby device where a protection link is located form a multiplex section protection group; when the active link in the main device gives alarm information or alarm disappearing information, an alarm message is sent to the standby device, and when the standby device receives the alarm message, a switching decision is performed. The invention provides the main device and the standby device. By means of the automatic protection switching method, the main device and the standby device, the communication of the multiplex section protection group between the devices can be accomplished, triggering conditions at two ends are responded, and the protection of multiplex sections among the devices is achieved.

The present invention discloses an inner reliable interconnected communication apparatus. The present invention adopts port binding technology to realize communication apparatus reliable interconnecting, through port binding two mutual backed physical network board communications to form one logical network board. In-frame service boards are all bound with tow physical network boards for realizing in-frame communication, logical network among different frames are all interconnected; physical network board in same frame also is bound; on this basic, service board or network board capable of select port communication to realize service load equipartition in port; in port fault automatically abandoning said link to realize link level protection reversion.

The invention discloses a communication equipment whose inside parts are reliably connected with each other, relating to the communication equipment, which can realize the reliable interconnection communication among frames and among veneers inside the equipment, based on the present hardware configuration and on the premise that the bandwidth utilization is assured. Wherein, a port binding technology is adopted to realize the reliable interconnection of the parts inside the communication equipment; through the port binding, two physical otter boards, which are backups for each other, are bound and communicated to form a logic otter board; service boards inside the frames are all port bound with the two physical otter boards to realize the communication inside the frames, and the logic otter boards among different frames are all interconnected; the physical otter boards inside one frame are also bound and interconnected; on such basis, the service boards or the otter boards can select ports to communicate to realize the average distribution of the traffic load at the ports, and automatically give up the link when the ports are in fault to realize the protection switching of the link grade.

The invention discloses a method for realizing Ethernet path protection switching, which comprises the following steps of: setting a TESI (Traffic Engineering Service Instance) protected by a protection group; carrying out state detection on a working entity and a protection entity; and realizing path protection switching according to an output port configured for an ESP (Ethernet Switching Path) of the TESI on the endpoint of the protection group, as well as a corresponding protection switch mechanism selected in the current state detection. The invention also discloses a system for realizing Ethernet path protection switching, and a switching unit in the system is used for realizing path protection switching according to the output port configured for the ESP (Ethernet Switching Path) of the TESI on the endpoint of the protection group, as well as the corresponding protection switch mechanism selected in the current state detection. The method and the system disclosed in the invention can be used for improving failure recovery speed, reducing nodes for protection switching, facilitating network optimization and ensuring the reliability of end-to-end traffic flow.

The invention relates to a device for realizing the multiplex section protection of a single fiber bi-directional WDM system, which comprises a management control unit composed of a monitor and a controller, wherein the monitor is located at the receiving end of A-directional wavelength in a channel layer. The method that uses the device to realize the multiplex section protection includes that the monitor detects the signal quality of multiple wavelengths and submits the results to a controller; the controller analyzes the data submitted by the monitor and sends down the protection switch command to a selector. The device and the method can overcome the technical problem that when the fiber in the working channel breaks, the monitor at the optical switch can still detect the reflection of the back light (a light splitter in the direction of the optical switch) so that the optical switch can not be successfully switched; the invention realizes the multiplex section protection switch of the single fiber bi-directional WDM system and ensures the reliable transmission of the WDM system.

The embodiments of the present invention provide a method, a system and a node for implementing Subnetwork Connection Protection (SNCP) in a Multi-Protocol Label Switching (MPLS) network. The method includes: sending, by a first node of a subnetwork of the MPLS network, an Operation, Administration and Maintenance (OAM) packet on a working path and a protection path of the subnetwork respectively; determining, by a second node of the subnetwork, working status of the working path and the protection path of the subnetwork according to the OAM packet on the working path and the OAM packet on the protection path, and selecting to receive traffic from one of the working path and the protection path of the subnetwork according to the working status. In accordance with the embodiments of the present invention, the SNCP may be implemented in the Transport Multi-Protocol Label Switching (T-MPLS) network.

The invention provides a method and a device for protection switching. The method includes the steps: adding all tunnels except for a main tunnel between a head node and a tail node into a tunnel backup set when protection switching between the head node and the tail node is built; performing protection switching for service transmission between the head node and the tail node through the main tunnel and a standby tunnel selected from the tunnel backup set by the head node; and when detecting that the main tunnel fails, selecting two tunnels from the tunnel backup set, using one of the two tunnels as a secondary main tunnel, using the other tunnel as a secondary standby tunnel and performing protection switching for service transmission between the head node and the tail node through the secondary main tunnel and the secondary standby tunnel. By the method and the device, existing resources can be sufficiently used.

Provided in the invention is a method for subnetwork connection protection. The method comprises the following steps that: a fault monitoring domain is expanded to be consistent with a protection domain and a corresponding alarm unit is added at the expanded portion of the fault monitoring domain; after a source node detects a fault at the expanded portion, the added alarm is generated and the alarm information is sent to a destination node; after the destination node monitors the alarm, protection switching is executed based on a protection switching entry-into-force condition. In addition, the invention also provides a system for subnetwork connection protection. According to the method and the system, fault monitoring on all nodes can be carried out, thereby realizing protection switching correctly.

The embodiment of the invention discloses a protection switching method, node equipment and a storage medium. The method comprises the following steps that: first node equipment identifies a receivedmessage under the condition that signal degradation is detected; when the first node equipment identifies that the message is an operation, maintenance and management (OAM) message, the OAM message isfilled with a first identifier, and the modified OAM message is sent; wherein the first identifier is used for representing signal degradation.

The embodiment of the invention discloses a protection switching method, node equipment and a storage medium. The method comprises the following steps that: first node equipment identifies a receivedmessage under the condition that signal degradation is detected; when the first node equipment identifies that the message is an operation, maintenance and management (OAM) message, a new message is generated based on a segment routing label in the OAM message; wherein the specific area of the new message comprises a first identifier used for representing signal degradation; and the first node equipment sends the new message.