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

The invention discloses a distributed electrical cross device and a system and a method thereof for realizing SNC cascade protection, and the device comprises a back plate and at least four veneers integrated with electrical cross units; the veneers are inserted into limited slots on the back plate and provided with circuit side service access units, client side service access units and back plate access units. In the invention, circuit side service and client side service are mounted on the same veneer, multiple service access and flexible dispatch such as circuit side service, client side service and the like can be realized in the back plate of limited slots, thus adding the function of processing multiple services of the distributed electrical cross system at a low cost. In addition, except for protection switching on subnet in fault, the invention also can perform protection switching on the veneer in fault. Due to introducing a multiplex and de-multiplex module to process subwave long-grade service, the subwave long-grade service in fault also can be protected by the invention.

The invention discloses a mobile communication system protection switching method based on a C-RAN framework, comprising: when an los alarm is detected in the receiving direction of an indoor business disc line side laser, the indoor business disc line side laser is immediately turned off reversely and is then turned on, allowing an los alarm in the receiving direction of an outdoor business disc line side laser, the outdoor business disc line side laser is turned off reversely, the main and auxiliary line receiving directions of an indoor business disc meanwhile detect an los alarm, and receiving and transmitting are meanwhile towards another work channel; when detecting that an los alarm is detected in the receiving direction of the outdoor business disc line side laser, the outdoor business disc line side laser is immediately turned off reversely and is then turned on, the main and auxiliary line receiving directions of an indoor business disc meanwhile detect an los alarm, and receiving and transmitting are meanwhile towards another work channel. The mobile communication system protection switching method realizes protection switching of a C-RAN framework under asymmetrical protection conditions; all automatic switching / manual switching / forced switching meet a G.873.1 protocol, and protection switching time is less than 50 ms.

Embodiments of the present invention provide a protection switching method, network node, and system. The communication method includes: when the first transport entity changes from the standby state to the active state, determine that only the first border node exists in the second protection domain the connected protection transport entity; switch the service to the first protection transport entity; send the first automatic protection switching APS message carrying the request triggered by the inter-domain protection switching. The embodiments of the present invention provide a protection switching method, network node and system, which can realize end-to-end protection switching and enhance the robustness of the protection network.

The present invention also provides a subnet connection protection method, including: the extended fault monitoring domain is consistent with the protection domain, and a corresponding alarm is added to the extended part of the fault monitoring domain; after the source node detects that the extended part is faulty, an increased the alarm, and send the alarm information to the sink node; after the sink node monitors the alarm, it executes protection switching as a condition for the protection switching to take effect. The invention also provides a subnet connection protection system. The method and system provided by the invention can monitor all nodes for faults, and realize protection switching correctly.

Disclosed are a clock protection method and device. The method comprises: determining an active / standby state of a current board; when the board is a standby board, determining whether a phase locked loop of the board is locked; when the phase locked loop of the board is unlocked, determining whether an unlocking time exceeds a preset threshold; when the unlocking time does not exceed the preset threshold, determining whether a phase locked loop of an active board is locked, and if the phase locked loop of the active board is unlocked, switching the standby board into an active board and clearing the unlocking time. The technical solution provided by the present invention solves the problem in the prior art that it is difficult to determine, only according to a running state of the phase locked loop, whether the clock needs to be switched and whether a new apparatus needs to be introduced for phase locked loop detection, avoids determining whether a fault point is a phase locked loop circuit or a clock source, and implements protection switching when the clock is asynchronous and the service is damaged without adding an external apparatus.

The invention provides a signal processing method and node in an optical burst network. The method includes: the receiving node determines whether the first optical burst OB signal on the working path is normal; when the receiving node determines that the second part of the OB signal in the first OB signal is abnormal, obtains the The first part of the OB signal except the second part of the OB signal, and obtain the second part of the OB signal from the second part of the OB signal on the protection path, where the content of the first part of the OB signal and the content of the second part of the OB signal are The same; the receiving node synchronizes the second part of the OB signal obtained from the second OB signal with the first part of the OB signal; the receiving node synchronizes the second part of the OB signal obtained from the second OB signal with the first part of the OB signal Merging is done in order to get the complete OB signal. The embodiment of the present invention can realize the protection switching of the OB signal at the optical layer, and improve the transmission efficiency of the OB signal.

The invention discloses a single optical fiber fault processing method and device. When a non-decision-making node in a cross-network element multiplex section protection group detects an alarm message that triggers a multiplex section protection group switchover, it judges that the cross-network element multiplex section Whether the communication link status between the decision nodes in the protection group is normal, if the communication link is abnormal, the alarm information is mapped to the sending fiber end of the protection group as the opposite end. The invention can solve the problem of traffic interruption when a single optical fiber fails when a communication link fails.

The present invention discloses a method, device and system for the protection of intersection ring networks. Two ring networks intersect at two intersection nodes, and the method for the protection of intersection ring networks includes the following steps: the intersection node at which a service does not cross the rings receives a packet, and forwards the packet according to forwarding information which is obtained by the synchronization with the forwarding information of the intersection node at which the service crosses the rings. With the use of the invention, a protection switching for intersection rings is achieved.

Provided is a method for automatic protection switching, which comprises: an active device where a working link is located and a standby device where a protection link is located forming a multiplex section protection group; when the working link where the active device is located generates alarm or alarm release information, sending an alarm packet to the standby device, and upon reception of the alarm packet, the standby device making a switching decision. Also provided are an active device and a standby device. Through the above technical solution, communication of the cross-device multiplex section protection group can be achieved, thereby implementing protection on the cross-device multiplex section in response to triggering conditions at two ends.

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.