At+t Corp.

Daniel Paul Heyman

Gagan Choudhury

Alan Edward Kaplan

Yonatan Aharon Levy

Danielle Liu

Vaidyanathan Ramaswami

Eberhard F Wunderlich

Jeffrey Polhemus

R Craig Hubbard

Frank A Field

An overload control mechanism in a packet-based network includes computing thresholds for respective classes of traffic so that packets of a given class are discarded when the number of buffered packets for that class exceeds the associated threshold.

Network having overload control using deterministic early active drops

A method that alleviates congestion problems in prior art networks by insuring that selected classes of calls have a reserved capacity, thus insuring a capability to service at least the selected level of traffic. In an illustrated embodiment, a selected capacity is reserved for voice calls, in contrast to data calls. When a connection request is made and there is unoccupied capacity, a voice call is always serviced, but a data call is serviced only if the number of established data connections is less than capacity of the path required for establishing a connection for the request, minus the capacity reserved for voice call.

Method for preventing overload condition in a circuit switched arrangement

A telecommunications method and system for providing and monitoring multiple classes of service to users seeking dial-up access to a given resource. Incoming calls from two user groups, one group subscribing to a first service level and the other group subscribing to a second service level, are initially assigned to open circuits in a first shared dial hunt group. When all circuits are busy, only calls from users subscribing to the second service level are routed to open circuits in a second dedicated dial hunt group so that second level service subscribers will have fewer calls blocked than first level service subscribers. In an alternative implementation, calls from users subscribing to a first service level are routed only to open circuits in a first dial hunt group and calls from users subscribing to a second service level are routed initially to open circuits in a second dial hunt group. When all circuits in the second dial hunt group are busy, calls from second level service subscribers are routed to the first dial hunt group. Service levels are monitored by placing test calls and measuring the number of blocked calls. Hunt group capacities can then be adjusted accordingly.

Method and system for providing multiple classes of telephone access service

Growing community of inventors

Lincroft, NJ, United States of America

Daniel Paul Heyman