Telecom Italia S.p.a.

Massimo Sassi

Vinicio Vercellone

Alessandro Faure Ragani

Giovanni Stea

Luciano Lenzini

Enzo Mingozzi

Angelo Garofalo

Luca Fantolino

Alessandro Michele Aiello

Marzio Alessi

Enrico Scarrone

Pierpaolo Fava

Paolo Mattone

Laura Apicella

Isabella Melli

A method and system for performing admission control in a packet-based telecommunication network includes a backbone network coupled between at least two access networks. When a first user on a first access network wants to communicate with a second user located on a different access network, a request is made to a quality server whether network resources are available. The quality server separately monitors both access networks and the backbone network and determines whether network resources are available to satisfy the request. In one embodiment, a two-tier approach is used wherein a coordinator module interacts with an admission control subsystem including a plurality of subsystem modules. Each admission control subsystem module is responsible for monitoring a part of the network, such as, one access network or a backbone network. The coordinator module determines which subsystem modules are associated with the user request and interrogates such subsystem modules as to resource availability.

Admission control in a telecommunication network

A system for fault and performance recovery in a communication network includes a set of network apparatuses as well as a plurality of sites connected by means of connections having a given topology. The network also includes routers for implementing given routing policies and has associated therewith at least one database maintaining information regarding the network apparatuses. The system includes test modules for executing performance tests created automatically by exploiting the information available on the topology of the connections between the various sites and by accessing the database in question. The test modules are configured for analysing the results of the performance tests to detect possible fault and performance impairment conditions of the network. In the presence of a fault and performance impairment condition detected in the network, the routers modify the routing policy to compensate for the fault and performance impairment condition.

Method and system for fault and performance recovery in communication networks, related network and computer program product therefor

A system for scheduling utilization of a service resource by a plurality of flows of information packets, wherein the flows include rate-guaranteed synchronous flows and best-effort asynchronous flows, the asynchronous flows exploiting the service capacity of the resource left unexploited by the synchronous flows. A server visits the flows, in subsequent rounds, by visiting first the synchronous flows followed by the asynchronous flows. The server is configured for detecting any backlogged synchronous flow, and when the server visits any said backlogged synchronous flow, it allows the backlogged synchronous flow to utilize the resource for a given time, whereby the synchronous flows have a guaranteed transmission window on each round. When the server visits any asynchronous flow, the time elapsed since the last visit by the server to the same asynchronous flow is determined. If the visit to the asynchronous flow occurs later than expected based on a reference round time, the asynchronous flow being visited is restrained from utilizing the resource for the ongoing round, and if the visit occurs earlier than expected based on the reference round time the asynchronous flow being visited is allowed to utilize the resource for a respective given time.

Method and system for scheduling utilization of resources, related communication network and computer program product

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Turin, Italy

Massimo Sassi