Sprint Communications Comapny L.p.

Timothy Gene Kelley

William Lee Edwards

Harold Wayne Johnson

Bryan Lee Gorman

Frank Anthony DeNap

Abdullah Murat Bog

Martin Joseph Kaplan

John Arndt Strand, Iii

Michael Thomas Swink

James William Baumgart

Joseph Moore

Murat Bog

Nina Taft

Richard G Ogier

Matthew Barrow

Shannon P Silvus

Chaoxin Charles Qiu

Bhargav R Bellur

Vinai Rajendran Sirkay

Balaji Srinivasan

Raymond Douglas Niehaus

Benjamin J Ewy

A communication network comprises a service layer, layer interface, and network layer to dynamically set-up a connection for a session. The service layer receives and processes a service request for a user system to generate and transfer a connection request. The connection request includes a connection identifier to correlate the connection with the session. The service-to-network layer interface receives and processes the connection request to generate and transfer the signaling messages that include the connection identifier. The network layer receives the signaling messages, and in response, dynamically establishes the connection. The connection is comprised of three segments that are established concurrently by the network layer.

Dynamic connection set-up in a communication network

Methods for determining at least two pre-computed paths to a destination in a communications network are provided. The two paths are maximally disjoint. Maximally disjoint paths are paths where the number of links or nodes common to the two paths is minimized. This minimization is given a priority over other path considerations, such as bandwidth or cost metrics. By pre-computing a maximally disjoint pair of paths, the probability that an inoperable link or node is in both paths is minimized. The probability that the inoperable link or node blocks a transfer of data is minimized. Additionally, a pair of maximally disjoint paths is determined even if absolutely disjoint paths are not possible. The communications network may include at least four nodes, and maximally disjoint pairs of paths are pre-computed from each node to each other node. A third path from each node to each other node may also be computed as a function of bandwidth or a cost metric. Therefore, the advantages of the maximally disjoint pair of paths are provided as discussed above and a path associated with a higher bandwidth or lower cost is provided to more likely satisfy the user requirements of a data transfer.

Communications network system and method for routing based on disjoint pairs of path

The invention comprises a series of architectures that are implemented in four phases to provide a migration path from an initial ATM service offering to a full service ATM network. The initial ATM network includes several metropolitan ATM networks that are interconnected by a core ATM network. Each metropolitan ATM network includes a service node that controls ATM network elements to deliver services. In Phase I, a business hub that is connected to the metropolitan ATM network integrates voice, data, and Internet traffic over a single ATM connection that contains permanent Virtual Connections (PVCs) to various destinations, such as other business hubs, a gateway to local and long distance networks, the Internet, a frame relay network. In Phase II, the architecture is extended to smaller business markets. Businesses are provided with the PVC-based ATM service using xDSL/ATM connections that are multiplexed at a central office and then provided to the service node over the metropolitan ATM network. A remote dial-in feature is also added. In Phase III, a work-at-home hub is provided for telecommuting. The work-at-home hub uses an xDSL/ATM connection through the central office to the service node. Phase III also includes the deployment of a session manager and provider agents that interact to interpret user requests and establish the requisite communications paths using Switched Virtual Connections (SVCs). The business can replace existing some or all PVC-based service with more efficient SVC-based service. In Phase IV, the architecture is extended to the residential market. A residential hub is provided for residential communications over an xDSL/ATM connection through the central office to the service node. An analog hub is provided for conventional telephone service through the service node.

Asynchronous transfer mode architecture migration

The invention is an ATM communications system that provides the option of advanced communications services or conventional telephone service to the customer. Advantageously, the ATM communications system does not require the widespread deployment of class 5 telephone switches to provide telephone service. A residential communications hub is located at a residence and communicates with the telephones at the residence using the analog telephony format. The residential communications hub converts between the analog telephony format and the ATM format. The residential communications hub is connected to a DSL mux by telephone wiring that carries the ATM/DSL format. The residential communications hub and the DSL mux communicate using the ATM/DSL format. The DSL mux converts between the ATM/DSL format and the ATM/SONET format. The DSL mux is connected to the an ATM switch by a broadband connection that carries the ATM/SONET format. The DSL mux and the ATM switch communicate using the ATM/SONET format. The ATM switch establishes ATM communications paths for the telephone service. A telephony hub is connected to telephones by telephone wiring that carries the analog telephony format. The telephony hub communicates with the telephones using the analog telephony format. The telephony hub is connected to the ATM switch by a broadband connection that carries the ATM/SONET format. The telephony hub and the ATM switch communicate using the ATM/SONET format.

Asynchronous transfer mode system for providing telephony service

An ATM reference traffic system records packet information representative of ATM packets transmitted over an ATM network. The system also creates and transmits ATM packets from packet information on a schedule representative of ATM packet transmission over an ATM network. The preferred system uses a personal computer with the operating system modified to schedule events with microsecond resolution while providing interrupts to the operating system on a periodic basis.

ATM reference traffic system

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Shawnee, KS, United States of America

Timothy Gene Kelley