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

The invention discloses a method and device for rapid protection switching of passive optical network (PON) ports in any slot position in a 10 Gbit / s Ethernet PON (10G-EPON) system. The method comprises the following steps: a plurality of PON service protection switching groups formed by two identical PON service cards are arranged on an optical line terminal (OLT); any PON port on one PON service card and any PON port on the other PON service card in each PON service protection switching group are configured as main and standby PON ports respectively; and complex programmable logic devices (CPLDs) on the PON service cards respectively detect the working condition of each autonomous PON port in real time, close optical modules on the main PON ports and notify the other PON service card of enabling the optical modules on the corresponding standby PON ports via protection switching data frames when lost of synchronous (LOS) signals on one or more main PON ports are detected on one PON service card. In the invention, the CPLDs are adopted to detect and judge the switching conditions and control switching, thus avoiding the problem of long switching time caused by using software for treatment and effectively ensuring rapid recovery of services when a single disk or main optical fiber has a fault.

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 embodiment of the invention discloses a protection method, device and system of intersected ring networks. In the embodiment of the invention, two intersected nodes exist between two ring networks. Taking the method of the embodiment as an example, the method comprises the following steps of: receiving a message between service non-transannular nodes in the two intersected nodes; and forwarding the message according to forwarding information acquired through synchronization with forwarding information of service transannular nodes. In the implementation mode, the forwarding information of the service transannular nodes in the intersected nodes is acquired through the synchronization of the service non-transannular nodes in the intersected nodes, and the received message is forwarded according to the forwarding information acquired through synchronization, thus the protection reverse of intersected rings is realized.

The invention relates to a method for realizing M:N protection in a T-MPLS network, and the method comprises the following steps: judging whether the received alarm information includes the designatedprotection LSP information or not, if so, using the designated protection LSP for transferring APS protocol bytes; if not, selecting the protection LSP, using the selected the protection LSP for transferring the APS protocol bytes; and establishing or canceling the protection LSP according to an APS signal message. The adoption of the embodiment of the invention can effectively ensure that the protection can be still provided for the working LSP which needs the protection when a plurality of chains go wrong.

The invention discloses a generating method for an optical transmission unit frame in an optical transmission network which is proposed for solving the problem that existing optical transmission network can not confirm the quality grade of a clock. The method comprises: A, the clock and the quality grade information thereof of a clock source in the optical transmission network is picked up; B, the clock is confirmed for the optical transmission unit frame to be generated according to the clock and the quality grade information thereof picked up in step A; C, the quality grade corresponding to the clock confirmed in step B is carried out coding, then inserted into a reserved byte of the optical transmission unit frame to be generated. The invention also discloses a device for realizing the method and a method as well as a device utilizing the optical transmission unit frame to transmit the clock quality grade information. The invention is convenient for the optical transmission network to realize synchronization and improves the network quality of the optical transmission network and the network protection function.

The invention discloses a method and a device for handling a single optical fiber fault. The method comprises the following steps: when a non-decision node in a cross network element multiplex section protection group detects the warning information of triggering the switching of the multiplex section protection group, judging whether the communication link between the node and a decision node in the cross network element multiplex section protection group is in a normal state or not, and if not, mapping the warning information to a sending optical fiber end which serves as a protection group at an opposite end. Due to the adoption of the method and device, the problem of flow interruption caused by the fault of a single optical fiber in case of fault of the communication link can be solved.

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.

The present invention provides a protection switching method and equipment, the method comprising: when establishing protection switching between the head node and the tail node, adding all the tunnels between the head node and the tail node except the main tunnel to the tunnel backup group ; The head node implements protection switching for the service transmission between the head node and the tail node through the main tunnel and the standby tunnel selected from the tunnel backup group; when the failure of the main tunnel is detected, two tunnels are selected from the tunnel backup group to One of the two tunnels is used as a secondary main tunnel, and the other tunnel is used as a secondary backup tunnel, and protection switching is implemented for service transmission between the head node and the tail node through the secondary main tunnel and the secondary backup tunnel. The present invention can make full use of existing resources.

The invention discloses a clock protection method and a clock protection device. The clock protection method includes judging main and standby states of a current single board; judging whether a lock phase ring of the single board is locked or not when the single board is a standby board; judging whether lock loss timing exceeds a preset threshold value or not when the lock phase ring of the single board is in lock loss; when the lock loss timing is within the threshold, judging whether a lock phase ring of a main use board is locked or not, if in lock loss, switching the single board into the main use board, and emptying the lock loss timing. By the above technical scheme, the problems that whether to switch clock or not is difficult to judge by running states of the lock phase rings only in the prior art, and new equipment is required for detecting the lock phase rings are solved, judging whether a fault point is a lock phase ring circuit or a clock source is avoided, and protective switching when in asynchronous clock and service damages caused by lock loss of the lock phase rings is realized on the premise of no extra external equipment.

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.

The invention provides a method and a node for processing a signal in an optical burst-switched network. The method comprises: determining whether a first path optical burst (OB) signal on a work path is normal by a receiving node, when determining a second part OB signal in the first path OB signal is abnormal, obtaining a first part OB signal from the first path OB signal except the second part OB signal, and obtaining the second OB signal from a second path OB signal on a protection path by the receiving node, wherein the contents of the first path OB signal and the second path OB signal are the same; synchronizing the second part OB signal obtained from the second path OB signal and the first part OB signal by the receiving node; and combining the second part OB signal obtained from the second path OB signal and the first part OB signal by the receiving node to obtain a complete OB signal. An embodiment of the invention can achieve protection switching of the OB signal in an optical layer, and improve the transmission efficiency of the OB signal.

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.