Abstract: A system and method of rearranging Label Switched Paths (LSPs) and rerouting traffic in a DiffServ-enabled Multi-Protocol Label Switched (MPLS) network is disclosed. The system periodically monitors network performance, and rearranges LSPs and reroutes traffic through existing or new Label Switched Paths (LSPs) based on network performance and network bandwidth utilized by various DiffServ classes.

Abstract: A policy change management scheme for network resource management through dynamic policy adaptations especially suitable for DiffServ-enabled MPLS networks is presented. The scheme incorporates automated resource adaptation capabilities to assure QoS for user traffic and to promote resource utilization in DiffServ-enabled MPLS networks. A suite of resource management policies, an ordered set of methods for adjusting policies, and interfaces to a companion policy-based network management system are provided. The policies are periodically adjusted based on predictive bandwidth estimation algorithms ensuring optimal resource allocation to individual service classes and enabling adjustment of resources for handling current traffic and traffic expected for the near future.

Abstract: Systems and methods for efficiently provisioning and assuring Quality of Service (QoS) between user networks communicating over a DiffServ-enabled network, with QoS management transparency to SIP user agents. The system comprises user networks communicating via a core network, each user network having a source and destination SIP user agent respectively, a SIP proxy server between the source SIP user agent and destination SIP user agent, a Bandwidth Manager to provision a pipe between the source user network and the destination user network, wherein the pipe has a specified bandwidth, and a QoS Agent for accepting and/or rejecting a SIP session based on availability of bandwidth in the pipe; wherein the SIP proxy server is configured to forward an incoming SIP request to the QoS Agent. The method comprises provisioning a pipe between the SIP user agents or their respective user networks, and allowing/rejecting incoming SIP sessions based on the available bandwidth in the pipe.

Abstract: A policy change management scheme for network resource management through dynamic policy adaptations especially suitable for DiffServ-enabled MPLS networks is presented. The scheme incorporates automated resource adaptation capabilities to assure QoS for user traffic and to promote resource utilization in DiffServ-enabled MPLS networks. A suite of resource management policies, an ordered set of methods for adjusting policies, and interfaces to a companion policy-based network management system are provided. The policies are periodically adjusted based on predictive bandwidth estimation algorithms ensuring optimal resource allocation to individual service classes and enabling adjustment of resources for handling current traffic and traffic expected for the near future.

Abstract: An apparatus for controllably distorting the duty cycle of a clock signal is disclosed. Methods and systems using embodiments of the invention are also described.

Abstract: A system and method of rearranging Label Switched Paths (LSPs) and rerouting traffic in a DiffServ-enabled Multi-Protocol Label Switched (MPLS) network is disclosed. The system periodically monitors network performance, and rearranges LSPs and reroutes traffic through existing or new Label Switched Paths (LSPs) based on network performance and network bandwidth utilized by various DiffServ classes.

Abstract: In future large-scale Emergency Response/Management (ER/EM) to terrorism and natural disasters, sharing the so-called common operational picture amongst dynamic task groups provides immediate advantages. In an ER/EM scenario, dissemination of the right data to the right person at the right time has a direct benefit. Timely and bandwidth efficient dissemination of sensor and Command and Control data remains a challenge. For example, dynamically changing mobile teams, information-needs profiling, information routing based upon information needs (not on IP address) are all complex issues.

Abstract: An apparatus for controllably distorting the duty cycle of a clock signal is disclosed. Methods and systems using embodiments of the invention are also described.

Abstract: In one aspect a method for correlating network events in a network comprises correlating the events relating to paths with events relating to links traversed by paths. In another aspect, the method includes correlating the events based on whether paths traversing the network share network resources, such as links. Preferably, the method is implemented in a network where paths traversing the network change dynamically in response to other network events and based on traffic engineering priorities.

Abstract: At least one substitute path is provided in place of a plurality of existing paths of a network to reallocate traffic carried by the plurality of existing paths. The total bandwidth needed to carry the traffic of the plurality of existing paths is determined. A proposed route is generated from the available links in the network. A portion of the bandwidth of a proposed route may be allocated to the needed bandwidth when the bandwidth of a proposed route is greater than or equal to the needed bandwidth. When the bandwidth of the proposed route is less than the needed bandwidth, at least one further route is generated, and the needed bandwidth is divided among the proposed route and the at least one further route such that a minimum number of further routes are generated.