Patent application number | Description | Published |
20090003231 | Transparent signaling agent - In today's network, enhancing or otherwise modifying signals in bearer flows in or at equipment already deployed in a network may be done by modifying or upgrading existing equipment, or otherwise invasively routing signals through identified network elements. In accordance with example embodiments of the present invention, signals for control plane flows are transparently monitored using policy based routing to direct control signals from a routing point to a signaling monitoring point. Bearer plane address information of a selected media processing point is substituted for other bearer plane address information in the control signal in a manner that causes subsequent bearer flows to be directed to the selected media processing point from the routing point by destination based routing. Bearer flows may be directed to a media processing point to apply signal enhancement to an encoded media signal on the bearer flows to produce an enhanced media encoded signal. Such embodiments enable service providers to upgrade networks with media processing in a low-cost, non-invasive manner. | 01-01-2009 |
20100232416 | Method and System for Multi-Layer Network Routing - Each node of a telecommunications network determines a connection type attributes available for each signal type supported by the node. Each signal type represents a different connection routing layer within the telecommunications network. Adaptation costs involved in traversing from one connection routing layer to another connection routing layer in the node are calculated. The connection type attributes and adaptation costs are included in a link state advertisement broadcasted by each node in the telecommunications network. A route calculation is performed for a desired signal to determine a route through the telecommunications network for the signal. The route calculation takes into account the various connection type attributes, availability, and adaptation costs in determining the shortest route for the signal through the telecommunications network. | 09-16-2010 |
20100232784 | DUAL FAULT TOLERANT OPTICAL NETWORKING WITH FAST PROTECTION PERFORMANCE - Optical networks occasionally experience a fault along a communications path. Service providers prefer to have an alternative communications path available to enable users to still communicate in a seamless manner. Accordingly, a method and corresponding apparatus for providing path protection for dedicated paths in an optical network is provided. | 09-16-2010 |
20110170416 | METHOD AND APPARATUS FOR LEAST COST ROUTING USING MULTIPLE PATH ACCUMULATED CONSTRAINTS - A cost of a path may not be the only factor in searching for a path solution in a network. For example, some applications are delay sensitive and require finding a path that does not exceed a latency constraint for the entire path. Accordingly, a method and corresponding apparatus for searching for a path solution in a network is provided that identifies combinations of partial paths that satisfy an end-to-end path constraint, compares attributes of the combinations of partial paths, prunes the combinations of partial paths based on results of the comparing to identify candidate combinations of partial paths, and selects a candidate combination of partial paths as the path solution. By pruning combinations of partial paths, considerable is saved compared to exhaustive comparing of every possible combination of partial paths and scalability is achieved. | 07-14-2011 |
20110262135 | METHOD AND APPARATUS FOR INCREASING OVERALL AGGREGATE CAPACITY OF A NETWORK - Example embodiments of the present invention relate to increasing an aggregate capacity of a network without using a centralized switch fabric. A method and corresponding apparatus in an example embodiment of the present invention relates to increasing overall aggregate capacity of a switching system. The example embodiment includes a first switching shelf having a first predetermined aggregate capacity, and multiple second switching shelves having a second predetermined aggregate capacity. The second predetermined aggregate capacity is less than the first predetermined aggregate capacity. The example embodiment increases the overall aggregate capacity as a function of connections between the first switching shelf and the multiple second switching shelves. The shelves are interconnected with interconnection links and can be configured to connect to additional shelves as the switching system grows to larger sizes. Embodiments can increase capacity while reducing cost within a network node. | 10-27-2011 |
20120124236 | METHOD AND SYSTEM FOR MULTI-LAYER NETWORK ROUTING - Each node of a telecommunications network determines a connection type attributes available for each signal type supported by the node. Each signal type represents a different connection routing layer within the telecommunications network. Adaptation costs involved in traversing from one connection routing layer to another connection routing layer in the node are calculated. The connection type attributes and adaptation costs are included in a link state advertisement broadcasted by each node in the telecommunications network. A route calculation is performed for a desired signal to determine a route through the telecommunications network for the signal. The route calculation takes into account the various connection type attributes, availability, and adaptation costs in determining the shortest route for the signal through the telecommunications network. | 05-17-2012 |
20120281523 | METHOD AND APPARATUS FOR COORDINATING FAULT RECOVERY TECHNIQUES AMONG DOMAINS - In a telecommunications/data network, it is common to have multiple recovery domains each employing its own technique for recovering a fault that may be different from a technique employed by another domain. Permitting multiple recovery domains to recover a fault without coordination among the domains can result in adverse interactions, such as rapid and repeated changes in the actions taken or “flapping,” and repeated hits to traffic. A method and corresponding apparatus for coordinating fault recovery in a network, according to an embodiment of the present invention, notifies a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network. Coordinating the recovery efforts of the first and second recovery domains reduces fault recovery time and allows concurrent actions to be taken. | 11-08-2012 |
20130064073 | ARCHITECTURE AND PROTECTION METHOD FOR MESH PROTECTION OF N SERVICES WITH M SHARED RESOURCES - The embodiments disclosed herein provide a mechanism for sharing protection resources in an arbitrary network topology involving pre-computing the protection resources so that data-plane-based protection can be used to activate the protection resources upon detection of a failure, thus, providing faster switching times than typical control-plane-based solutions. This is accomplished by configuring a mesh network to include, for a working path in the network, one or more protection paths with the same end nodes as the working path, where each protection path includes at least one intermediate node that is not part of the working path. The intermediate node accepts a protection request from one of the end nodes and determines whether a local resource for a protection path is available. If the local resource is available, the intermediate node forwards the protection request along the protection path, but, if the local resource is unavailable, the intermediate node notifies the end node from which the protection request originated that the protection path is unavailable. | 03-14-2013 |
20140337668 | Method And Apparatus For Coordinating Fault Recovery Techniques Among Domains - In a telecommunications/data network, it is common to have multiple recovery domains each employing its own technique for recovering a fault that may be different from a technique employed by another domain. Permitting multiple recovery domains to recover a fault without coordination among the domains can result in adverse interactions, such as rapid and repeated changes in the actions taken or “flapping,” and repeated hits to traffic. A method and corresponding apparatus for coordinating fault recovery in a network, according to an embodiment of the present invention, notifies a first recovery domain that a second recovery domain is or is not taking action to recover a fault in the network. Coordinating the recovery efforts of the first and second recovery domains reduces fault recovery time and allows concurrent actions to be taken. | 11-13-2014 |