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 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 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 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 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 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 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 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.

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.

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 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 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 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.

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 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.

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.

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.