55results about How to "Fast protection switching" patented technology

A symmetrical capacity network may be adapted to accommodate asymmetrical network traffic patterns by deploying Protected Dedicated Wavelengths (PDWs) between one or more head-end nodes and the access nodes on a ring-based topology network. The PDWs include pairs of wavelengths extending in opposite directions around the fibers forming the original ring and terminating at the intended access node. The pairs of wavelengths form unidirectional working and protection paths from the head-end node to the intended access nodes. By deploying the symmetric capacity and asymmetric capacity on the same platform within the head-end node, it is possible to apply policy across the network resources to allow traffic flows to be selectively placed on the most appropriate network resource.

The invention discloses a method for protecting rearrangement, which comprises the steps of: carrying out data measuring to a primary path and an alternate path of at least one optical network unit (ONU) in a passive optical network system so as to obtain a round trip time difference value between the primary path and the alternate path; obtaining the adjustment time of the alternate path in eachONU in the passive optical network system according to the round trip time difference value; and when the primary path goes wrong, according to the adjustment time, the service is rearranged into thealternate path. The invention also provides a system and a device for protecting the rearrangement, which can realize rapid protective rearrangement of the service when the primary path goes wrong, thus improving the performance of protecting the rearrangement.

The invention discloses a system and a method for realizing OLT (Optical Line Terminal) voice double upper-link protection based on OSPF (Open Shortest Path First Interior Gateway Protocol) routing protocol, and relates to the field of PON (Passive Optical Network). A CPU of an OLT master control panel in the system comprises an OSPF module and an RTM (Running Timer Meter) module. Two upper-link ports of an OLT are respectively connected with a NGN (Next Generation Network) through three-layer exchangers A and B to connect with a remote-end MGC (Media Gateway Controller) server; paths A and B are formed between the OLT and the MGC server; the OLT and the three-layer exchangers A and B are respectively configured with the OSPF protocols and operate; the OLT learns the routes of all network sections on the paths A and B through the OSPF route protocol; the OSPF module stores the learnt routes in the route table of the OSPF module and announces the learnt routes to the RTM module; and the RTM modules collects the route items and writes the route items in an RIB table. When a main link breaks, the OSPF route protocol learns the route of a backup link and carries out rapid protective rearrangement to the high real-time voice business among internetworking nodes.

New layer of data link layer protocol - data link procedure (DLP) is introduced between IP of network layer and WDM in physical layer in the invention to realize syncretizing adaptation between Internet and WDM in order to overcome shortage of current adaptation technique. The method possesses features are: high efficiency of forwarding IP packets, safety and reliability, flux engineering capability, 50 ms protected rearrangement function, realizing exchange between granule level circuit of virtual container and optical wavelength directly, and realizing compatibility between 1Pv4 and IPv6 networks and compatibility to packet voice network. Using safety mechanism, network control management mechanism, flow management mechanism provided by DLP realizes safety management, control management and flow management for IP network. The method makes current IP network transits to united telecom public network in next generation smoothly.

The invention discloses a dispersion compensation method of an electric domain and a filter parameter regulator, which are applied to a coherent receiving system. The method comprises the steps of: presetting a dispersion compensation value or a dispersion compensation list of a protective path of a coherent receiving system; and configuring a dispersion compensation parameter required for regulating the dispersion of the protective path according to the preset dispersion compensation value or the dispersion compensation list when the dispersion of the protective path is needed to be regulated. The dispersion compensation method of the electric domain and the filter parameter regulator, which are provided by the invention, realize quick protection switching.

The invention provides a method and a device for eliminating a loop in a resilient packet ring (RPR) network. According to the method, a loop exists between nodes of different resilient packet rings (RPRs) in the RPR ring network, each node of the loop enables rapid ring protection protocol (RRPP) configuration, two ports of each node are provided with RRPP rings, a node on an RRPP ring is specified as an RRPP master node, the RRPP master node specifies a port connected with the RRPP ring as a main port and the other port as an auxiliary port, when the RRPP ring is positioned in a health status, the main port is opened and the auxiliary port is blocked, when the blocked auxiliary port is an RPR logic port, the RRPP master node prevents the RPR connected with the auxiliary port from executing insert and transit operation of data messages but executes the transit operation of RRPP messages on the RPR connected with the auxiliary port. By the method and the device, the loop in the RPR network is easily and effectively eliminated; and because the RRPP is configured, faults can be subjected to quick protection switching.

New layer of data link layer protocol - data link procedure (DLP) is introduced between IP of network layer and SDH/SONET in physical layer in the invention to realize syncretizing adaptation between Internet and SDH/SONET in order to overcome shortage of current adaptation technique. The method possesses features are: high efficiency of forwarding IP packets, safety and reliability, flux engineering capability, 50 ms protected rearrangement function, realizing exchange between SDH/SONET circuit of virtual container and optical wavelength directly, and realizing compatibility between 1Pv4 and IPv6 networks and compatibility to packet voice network. Using safety mechanism, network control management mechanism, flow management mechanism provided by DLP realizes safety management, control management and flow management for IP network. The method makes current IP network transits to united public network in next generation smoothly.

The invention relates to a method and a device for enhancing the reliability of a multicast source. The method comprises the following steps of: 1, establishing communication links between a main multicast source server and a standby multicast source server for the same multicast flow and respective upper routers, wherein the main multicast source server and the standby multicast source server are configured with the same source address and forward the multicast flow to the respective upper routers; and 2, detecting whether the multicast flow can be normally transmitted by using the main multicast source server, when a fault happens, forcing the communication link to fail by using the main multicast source server, and after network routers are converged, providing a multicast data flow by using the standby multicast source server. The method and the device can provide quick protective switching due to the exception caused by multicast source server flow type fault so as to ensure the non-interruption of IPTV service.

The invention discloses a mode switchable smart optical cable monitoring system and method. The system comprises a light source module, a network management server, an RTU unit device and a client computer. According to the system and the method, the problem that an existing optical cable monitoring device cannot realize the fact that three working modes: a standby fiber test, an online test and protection monitoring are taken into consideration by the same RTU device at the same time is solved. The mode switchable smart optical cable monitoring system is provided. When the system is applied,24-hour all-whether real-time automatic monitoring can be carried out on an optical cable state; the system has a relatively high detection probability, a relatively low false alarm probability and the relatively high optical cable breakpoint positioning precision; the system has a rapid optical cable protection switching function; the normal operation of an original transmission system is not influenced; and the system has various alarm modes: a short message, a mail and sound and light. When the system is applied, the three working modes: the standby fiber test, the online test and the protection monitoring can be taken into consideration by the same RTU device at the same time. No matter which working mode is employed, an optical fiber in an optical cable is occupied, so optical fiber resources are greatly saved.

The invention relates to a low-expense high-survivability PON protection structure, and belongs to the technical field of optical networks. A plurality of different functional units of logic decision, backup transmitting-receiving, protection path control, and the like are additionally arranged in an optical line terminal; the switching of an optical switch is confirmed by the logic decision unit according to received logic signals; protection wavelength of a faulty component is tuned by the backup transmit-receive unit to enable a WDM part to conduct switching operation just on the faulty component to realize low expense concentrated protection; a cross concentration line structure is adopted at a TDM part; quick distributed protection switching is realized when ONU detects fault. According to the invention, the number of components participating in the protection switching in the WDM/TDM-PON system is effectively decreased; influence range of the fault is reduced; protection resource expense on the fault is reduced; full protection to all optical fiber fault in the whole system is realized.

The embodiment of the invention provides a protecting and rearranging method, a system and a node. The method comprises the steps of using an intermediate node to receive the protection and rearrangement request information sent by an upstream neighbor node of the intermediate node; using the intermediate node to determine whether the protection channel resource of the intermediate node is available according to the protection and rearrangement request information, and if the protection channel resource of the intermediate node is free, to send the first indication information used to notice the upstream neighbor node that the protection channel resource of the intermediate node is available, to the upstream neighbor node, and to send the protection and rearrangement request information to a downstream neighbor node of the intermediate node; establishing the cross connection of a first protection path at the intermediate node after the intermediate node receives the second indication information that the protection channel resource of the downstream neighbor node of the intermediate node is available. Therefore, the resource utilization rate is improved, the protection rearrangement can be carried out rapidly, the efficiency is improved, and the error connection of businesses during the protection rearrangement process is avoided.

The invention discloses an exchange system based on a sharing memory and a load-sharing mode and a protection switching method with an interface grade. The system in the invention comprises two exchange planes and a plurality of exchange terminals which are connected with a signal wire through a backboard bus and a high-speed chain. Each exchange terminal is provided with a filter. The settings of the filters in the plurality of exchange terminals lead any exchange terminal to only receive messages from a fixed exchange plane. The method in the invention discloses a protection switching method with the interface grade in the system. By adopting the system and the method in the invention, a great progress in the respects of assuring the stability and reliability of the communication system is achieved. The switching time of the protection switching with an interface grade is shortened to the greatest extent; the lost message is reduced to the minimum and more stable a faster speed meets the switching requirement for the communication grate device.

The invention discloses an HQoS protection method and an HQoS protection device through multiple board cards. According to the method, an VOQ-ID is coded for all business board cards in turn via a main board card; then the allocated VOQ-ID and HQoS configuration information are synchronized to all standby board cards, and all the business board cards respectively apply for VOQ resources and complete HQoS configuration; and when a fault occurs on the main board card, the fault main board card is offline, port protection switching is performed, and the standby board cards are updated to the VOQ-ID of the offline fault main board card and selected to be the main board card through competition. The device is corresponding to the method. When the fault occurs on the main board card, rapid traffic protection switching to the standby board cards can be realized by only changing the NODE-ID position in the VOQ-ID so that realization is easy and operability is high.

The invention discloses a fault recovery method and system, and relates to the technical field of communication. The fault recovery method comprises the following steps: receiving a first loop calculation result of a first looped network protection protocol; based on the first loop calculation result, maintaining the port states of the forwarding port and all associated blocked ports in the protection link group table, and issuing port settings; receiving a link fault detection result, modifying the forwarding port of a fault link and port states of all associated blocked ports in the protection link group table, and issuing port settings; synchronizing a forwarding link fault detection result to recalculate according to the first ring network protection protocol; and updating the protection link group table based on the recalculation result. The fault recovery method and system are combined with a hardware link state detection technology, when a link fault is detected, link protectionswitching is rapidly carried out, and packet loss caused by long-time service protection switching after calculation of an existing link protection protocol is avoided.

The invention provides a data collecting device, a data sending device and a data communication system, wherein the data communication system comprises a data collecting device and data sending devices; the data collecting device is built with total/partial ports on a plurality of data sending devices to form a communication network through all ports on the data collecting device; the communication network is of a semi-reticular network topological structure including a plurality of paths; the data request and the data response are in one-way transmission on the paths of the communication network. The realization of normal collection on data on most external equipment can be ensured under the condition that the communication network generates single-point or partial multi-point fault.

The invention provides a signal degradation alarm method and device, terminal equipment and a storage medium, and the method comprises the steps: writing signal degradation alarm information into a preset field of a message; and sending the message of which the preset field carries the signal degradation alarm information to a corresponding receiving end on a link, so that the receiving end starts protection switching or route reselection of the link when detecting that the preset field of the message carries the signal degradation alarm information. According to the invention, the signal degradation alarm information is written into the preset field of the message, so that the end-to-end message carries the intermediate cross-segment SD state, a related link is timely notified to carry out protection switching or route reselection, at least the problem that the link is timely notified to carry out rapid protection switching when the intermediate cross-segment link has signal degradation in an SR-TP tunnel can be solved, and when signal degradation exists in a middle cross-segment link of the SR-BE tunnel, an SD alarm link is avoided, and a new link is selected again, so the robustness of the service is ensured.

The invention discloses a communication method, device and system of a passive optical network. The method includes: the optical network unit receives the first message sent by the optical line terminal, the first message carries the backup wavelength channel identification information; when the optical network unit detects a fault, the optical network unit sends the optical network unit The working wavelength channel is switched to the backup wavelength channel identified by the backup wavelength channel identification information; the optical network unit performs data communication through the switched backup wavelength channel, realizing fast protection switching of the passive optical network system, and then Improve the reliability of the system.