33 results about "Subnetwork connection protection" patented technology

The present disclosure provides Optical Transport Network (OTN) port protection systems and methods using flexible switch criteria. Specifically, the OTN port protection systems and methods provide linear protection in OTN such as 1+1 Protection with Automatic Protection Switching (APS) and/or 1+1 Subnetwork Connection Protection (SNCP) Protection. The OTN Port Protection with flexible switch criteria allows a user to provision a protection application on an OTN Port and select a switch criteria, Section Monitoring, Path Monitoring, or Tandem Connection Monitoring, without considering the provisioning state of an Optical channel Data Unit level k (ODUk) entity. The ODUk entity may either be cross-connected in the LO case or terminated in the HO case. The ODUk entity may be provisioned independently, after the port protection has been established.

Extra traffic paths are provided in a communication network including at least two protection channels associated to respective transmission channels. Each protection channel admits an active state for carrying, in the presence of a failure in the associated transmission channel, traffic to be carried by the associated transmission channel, and a stand-by state, wherein the protection channel is adapted to carry extra traffic. The protection channels are run in a sub-network connection protection scheme, whereby one of the protection channels in its stand-by state is adapted to ensure recovery of extra traffic carried by the other protection channel while the other protection channel is switched to its active state or is subject to failure.

The invention discloses a protection method and system for TD-LTE (Time Division Long Term Evolution) service. The method comprises the steps of bearing the time division long term evolution TD-LTE service through adoption of an optical transmission network and a packet transmission network OTN+PTN; configuring optical channel data unit k subnetwork connection protection ODUk SNCP in the OTN; and when a fault occurs in a core layer and/or a convergence layer of the OTN, switching the TD-LTE service to a network layer of the OTN through the ODUk SNCP, thereby enabling the PTN network to be senseless.

The utility model relates to a network security protection method, an apparatus, and a system. The method comprises: determining the optical transmission network interface of a fault according to the signal failure when the signal failure upon the link of an optical transmission network is detected; transmitting the signal failure to a grouping transmission network interface corresponding to the optical transmission network interface according to the business configuration path; sending forward failure indication or alarming indication signals to the grouping transmission network via the grouping transmission network interface, thus to trigger the grouping transmission network to carry out automatic protection switching; when the fault signal of the grouping business channel of the grouping transmission network is detected, determining the grouping transmission network interface of the fault according to the fault signal of the grouping business channel; transmitting the fault signal to an optical network interface corresponding to the grouping transmission network interface according to the business configuration path; and sending signal failure to the optical transmission network via the optical transmission network interface to trigger the optical transmission network to carry out subnet connecting protection switching.

Said invention refers to service route adjusting optimistic method optimistic method to avoid generating service interruption problem. Said includes A, establishing one new route composing sub network connection protecting protection group between new route and original route, to form new route service crossing, selecting service on special route, B, dismantling original route original route.

The invention discloses a node management method and a control plane, relates to the technical field of an optical network and can solve the problem the existing optical network can not simultaneously carry out span switch and automatic creation of new protecting paths. The node management method provided by the embodiment of the invention comprises the following steps: creating two-way cross between working paths of two spans connected at a span node after receiving a creation request of the working paths; and modifying the two-way cross to subnet connection protection between the paths of the two spans connected at the span node after receiving the creation request of the protecting paths, wherein the paths of the two spans comprise the working paths and the protecting paths of the two spans. The embodiment of the invention can calculate the new standby protecting paths by the control plane according to the corresponding algorithm, thereby ensuring that the exiting protecting paths can bear services through the standby protecting paths after faults exist in the existing protecting paths, and ensuring the normal operation of the services.

The invention discloses a double-node interconnection protection method, and the method comprises the steps: employing SNCP (subnetwork connection protection) to combine a backbone scheduling ring and a business downloading ring into a business scheduling downloading ring; enabling the business scheduling downloading ring to be intersected with a first convergence ring at a first network element and a second network element; enabling the business scheduling downloading ring to be intersected with a second convergence ring at a third network element and a fourth network element; enabling the source time slot of the first network element to be configured at a link side of the first convergence ring; enabling the working time slot of the first network element to be configured in the direction of the second network element; enabling a protection time slot of the first network element to be configured in the direction of the third network element; and enabling the time slot, passing through the first network element, of the second network element to arrive at the fourth network element. The invention also discloses a double-node interconnection protection system.

The invention provides a method for achieving sub-network connection protection through TCM function, suitable for the condition of two TCM source-sink SDH regions, which includes (a) setting SN equipped with sub-network connection protection as middle node TCM function manner; and (b) respectively detecting signals transmitted from two source ends SN by the SN equipped with sub-network connection protection, and executing switching operation to switch operation from the working channel to the protection channel when an incoming alarm instruction signal (Incoming AIS) information is detected in the signal transmitted by the current working channel at N1 or N2 byte and the protection channel signal is available. The invention can normally execute switching to obviate operation interruption or frequent switching when a net element equipped with sub-network connection protection is set to a mode not supporting source/sink end and when the net element receives a signal with TC-IAIS information.

The invention provides a low-order channel subnetwork connection protection device and a method thereof. The low-order channel subnetwork connection protection device comprises a light panel, a time division crossing processing unit and a branch processing unit. The method of the low-order channel subnetwork connection protection device includes the following steps: A. a main control board sends the calculated crossing protection relationship to the time division crossing processing unit; B. according to the received crossing protection relationship, the time division crossing processing unit configures chips; C. the time division crossing processing unit detects the alarms of every channel, and according to the current signal quality of the active-standby channel, every protection group implements protection and switching. The low-order channel subnetwork connection protection device and the method thereof have the advantages of easy realization of the protection of the low-order channel from light panel crossing to a branch board and low cost.

The invention provides a method for realizing an Ethernet protection switching. The method comprises: in two data units dual-homed connected in the Ethernet, when a data unit which is transmitting a service learns local link anomalies, inserting an alarm in a time slot of a corresponding system port, and a cross board choosing the system port's time slot of the data unit without the alarm to transmit the service according to a sub-network connection protection. The invention also provides a system for realizing the Ethernet protection switching. The method and the system can effectively solve a problem that in a dual-homed connection, the service cannot be continuously transmitted as normal when a channel is broke down.

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 method for realizing the subnet connection protection bi-directional automatic rotation. The method comprises the following steps that: a. a first terminal node periodically detect and find failure, and in the returning signal, the RDI bit in the channel spending G1 byte corresponding to the failure is set to be the preset rotation value of statistical indicant, and the returning signal is sent to a second terminal node downstream; b. the first terminal executes the rotation action of channels; c. after the second terminal node receives the returning signal, the second terminal node detects the value of the RDI bit in the channel spending G1 byte and executes the bridging connection action of the channel, the value of the RDI bit of which is the rotation value of statistical indicant. In the technical proposal of the invention, the channel spending is only utilized to realize the subnet connection protection bi-directional automatic rotation.

The invention provides a method and a system for reducing time of transient interruption of subnetwork connection protection service. The method comprises the following steps: after a head node and a tail node are configured with subnetwork connection protection service, if the fact that a working routeway fails on the head node or the tail node is detected, controlling the node to switch service to a protecting path, and controlling the node to send warning information switched to the protecting path to an opposite-end node. The method can effectively reduce the time of transient interruption when the subnetwork connection protection service restores after working faults appear in an automatic switching optical network.

The invention discloses a route switching method in subnet connection protection and a microwave nodal point device. The method includes that the microwave nodal point device receives local request orders, obtains interruption port information and determines to be switched to a matched SNCP route according to configuration state and the interruption port information. By means of the technical scheme, the method resolves the problem in the relative art that subnet connection protection in VC4 grade and VC12 grade is poor in reliability and time and further improves reliability of the subnet connection protection.

The invention discloses a method and a device for checking business sub network connection protection. The method comprises the following steps: determining a first group of business passing through a first sub network in an SNCP (Sub Network Connection Protection) sub network group; determining a second group of business passing through a second sub network in the SNCP sub network group; and determining the business which is contained in the first group of business but not the second group of business as well as the business which is contained in the second group of business but not the first group of business as the business which is not subjected to SNCP protection. According to the scheme provided by the embodiment of the invention, the efficiency of checking the business sub network connection protection is improved.

The invention discloses a virtual protection method for a fiber path. In the method, an optical port is physically divided into multiple minimum protection units. Based on the minimum protection units, a system is divided into more than one logic-system. In a logic-system, each node can work in one of four working modes: normal working mode, passing working mode, bridging working mode and switching working mode. When it is necessary to provide protection, a node is switched from normal working mode to the other three working modes through multiplex section protection, or sub-network connection protection, or channel protection etc. The invention also discloses a virtual protection device for a fiber path. With the method and the device according to the invention, not only disadvantages of the prior protection mode can be overcome, but also transmission networking can be more flexible, and this protection mode can satisfy the increasing requirements of users.