Abstract: A method for optical network signaling processing of a signal from a first node to an end node through intermediate nodes is presented. The method comprises determining, in a first pass from the first node to the end node, available wavelengths and wavelength conversion at each node, the end node optimizing wavelengths using the available wavelengths and wavelength conversions, at each node, dropping a cross-connect command, in a second pass from the end node to the first node, choosing wavelengths for connection based on the optimizing step, in a third pass from the first node to the end node, receiving at each node a signal message and releasing unused cross-connect commands, the end node identifying the chosen wavelengths and releasing the unused resources, and transmitting the signal on the chosen wavelengths. Restoration paths can also be determined. Optimizing can include selecting and marking one or more backup wavelengths.

Abstract: A method for estimating the performance of GSM cellular networks that employ “directed retry”, in which a call blocked by the sector of its initial attempt may be redirected to an alternative sector that is also accessible to the call, thereby increasing the effective capacity of the network. The method may be stored in a memory and executed as instructions by a microprocessor.

Abstract: A method for optical network signaling processing of a signal from a first node to an end node through intermediate nodes is presented. The method comprises determining, in a first pass from the first node to the end node, available wavelengths and wavelength conversion at each node, the end node optimizing wavelengths using the available wavelengths and wavelength conversions, at each node, dropping a cross-connect command, in a second pass from the end node to the first node, choosing wavelengths for connection based on the optimizing step, in a third pass from the first node to the end node, receiving at each node a signal message and releasing unused cross-connect commands, the end node identifying the chosen wavelengths and releasing the unused resources, and transmitting the signal on the chosen wavelengths. Restoration paths can also be determined. Optimizing can include selecting and marking one or more backup wavelengths.

Abstract: The present invention relates to on-line admission-control decisions. Specifically, the invention concerns general delay bounds for both deterministic and statistical cases for Differentiated Services (DiffServ) networks. More specifically, a detailed method of calculation in each case is followed by simpler methods of calculation that are more appropriate for on-line admission-control decisions. Relatively involved occupancy bound calculations for various service classes take place only at the time of network configuration or reconfiguration. At the time of admission control only simple occupancy threshold compliance calculations need to be performed. Concrete illustrations are provided for deriving bounds for the EF and AF classes provided by DiffServ. These results are applicable to both layer-3 networks that support DiffServ and layer-2 networks that support the more restricted class of service functions.

Abstract: Disclosed is a technique for data network congestion diagnosis using remote estimation of round-trip delays. A monitoring node transmits test messages between network nodes and measures the transit times between when the test messages are transmitted from, and when they return to, the monitoring node. A path delay between network nodes is determined based on the measured time delays. The techniques for determining network path delay are also utilized in conjunction with a three phase test procedure for diagnosing network congestion problems. Due to various network topologies and routing tables, certain confirmatory checks may be required to determine whether the procedures of the first or second phase test procedures are appropriate for particular path segments. Further, queuing delays may be determined by subtracting traffic independent delays from the measured transit times of the test messages, and such queuing delays may be used to determine the path delays.

Abstract: A method for estimating the performance of GSM cellular networks that employ “directed retry”, in which a call blocked by the sector of its initial attempt may be redirected to an alternative sector that is also accessible to the call, thereby increasing the effective capacity of the network. The method may be stored in a memory and executed as instructions by a microprocessor.

Abstract: A communications network monitoring system and method remotely determines the total bandwidth between any two nodes on the network as well as the available bandwidth between nodes at a given time. A remote host sends data packets to each of the two nodes. A reply is sent back to the remote host generating a delay time. A set of delay times for data packets of various sizes is generated at the host. The data set is then analyzed using a robust estimation method and a Bayesian analysis to determine the total bandwidth and the mean delay between the two nodes. Moreover, the available bandwidth for a time, t, can be estimated by first injecting traffic into the network from a remote traffic generator to develop an estimate of the traffic and a router characteristic parameter, &ggr;. This constant and a Bayesian estimate of the &agr;(t) are used to estimate the available bandwidth at any given time t.