Jayant G Hemmady

48721590, Oct 3, 1989

Mar 31, 1988

7/175546

Jayant G. Hemmady - Naperville IL
William P. Lidinsky - Naperville IL
Gary A. Roediger - Downers Grove IL
Scott B. Steele - Naperville IL
Ronald C. Weddige - Western Springs IL
Bruce R. Zelle - Naperville IL

American Telephone and Telegraph Company AT&T Bell Laboratories - Murray Hill NJ

H04J 326

370 60

A high capacity metropolitan area network (MAN) is described. Data traffic from users is connected to data concentrators at the edge of the network, and is transmitted over fiber optic data links to a hub where the data is switched. The hub includes a plurality of data switching modules, each having a control means, and each connected to a distributed control space division switch. Advantageously, the data switching modules, whose inputs are connected to the concentrators, perform all checking and routing functions, while the 1024. times. 1024 maximum size space division switch, whose outputs are connected to the concentrators, provides a large fan-out distribution network for reaching many concentrators from each data switching module. Distributed control of the space division permits several million connection and disconnection actions to be performed each second, while the pipelined and parallel operation within the control means permits each of the 256 switching modules to process at least 50,000 transactions per second. The data switching modules chain groups of incoming packets destined for a common outlet of the space division switch so that only one connection in that switch is required for transmitting each group of chained packets from a data switching module to a concentrator.

54385652, Aug 1, 1995

Mar 31, 1993

8/040819

Jayant G. Hemmady - Naperville IL
Craig P. Reilly - Carol Stream IL
Neil J. Romy - Lisle IL
Ronald A. Spanke - Wheaton IL
Douglas H. Yano - Naperville IL

AT&T Corp. - Murray Hill NJ

H04L 1264

370 60

A system for relaying CDMA packetized data from a cell site or sites to a destination speech processor. The CDMA packetized data, is received at the cell site and is sent in its packetized form along with a destination address to a packet switch. A packet handler at the packet switch receives the CDMA data packets and forwards them on a packet bus. If the destination speech processor assigned to that call is connected to the packet bus, it recognizes its own address and processes the data packet.

49583417, Sep 18, 1990

Mar 31, 1988

7/175547

Jayant G. Hemmady - Naperville IL
William P. Lidinsky - Naperville IL
Scott B. Steele - Naperville IL
Werner Ulrich - Glen Ellyn IL
Roanld C. Weddige - Western Springs IL

AT&T Bell Laboratories - Murray Hill NJ

H04Q 1104

370 601

A high capacity metropolitan area network (MAN) is described. Data traffic from users is connected to data concentrators at the edge of the network, and is tranmitted over fiber optic data links to a hub where the data is switched. The hub includes a plurality of data switching modules, each having a control means, and each connected to a distributed control space division switch. Advantageously, the data switching modules, whose inputs are connected to the concentrators, perform all checking and routing functions, while the 1024. times. 1024 maximum size space division switch, whose outputs are connected to the concentrators, provides a large fan-out distribution network for reaching many concentrators from each data switching module. Distributed control of the space division switch permits several million connection and disconnection actions to be performed each second, while the pipelined and parallel operation within the control means permits each of the 256 switching modules to process at least 50,000 transactions per second. The data switching modules chain groups of incoming packets destined for a common outlet of the space division switch so that only one connection in that switch is required for transmitting each group of chained packets from a data switching module to a concentrator.

53633695, Nov 8, 1994

Mar 31, 1993

8/040818

Jayant G. Hemmady - Naperville IL
Craig P. Reilly - Carol Stream IL
Neil J. Romy - Lisle IL
Ronald A. Spanke - Wheaton IL

AT&T Bell Laboratories - Murray Hill NJ

H04Q 1104

370 60

A system for delivering packetized data in a network comprising a plurality of packet switch communities, wherein each of the packet switch communities has a plurality of endpoints connected to a common packet switch and having a unique address, and wherein each of the endpoints has addresses unique to their respective packet switch community. The endpoints in this system add a two-part destination address to the packetized data to be sent, wherein the first field represents a packet switch community and the second represents a destination endpoint. Each packet switch community is responsive to the first field being different from its own address for delivering the packetized data to a switch. The switch is responsive to the first field for delivering the packetized data to a packet switch community identified by the first field. Finally, each endpoint in the destination packet switch community is responsive to the first and second address fields for accepting packetized data.

48948241, Jan 16, 1990

Mar 31, 1988

7/175543

Jayant G. Hemmady - Naperville IL
Michael J. Knudsen - Wheaton IL
Robert K. Nichols - Glen Ellyn IL
Gaylord W. Richards - Naperville IL
Gary A. Roediger - Downers Grove IL

American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ

H04Q 1104

370 583

A high capacity metropolitan area network (MAN) is described. Data traffic from users is connected to data concentrators at the edge of the network, and is transmitted over fiber optic data links to a hub where the data is switched. The hub includes a plurality of data switching modules, each having a control means, and each connected to a distributed control space division switch. Advantageously, the data switching modules, whose inputs are connected to the concentrators, perform all checking and routing functions, while the 1024. times. 1024 maximum size space division switch, whose outputs are connected to the concentrators, provides a large fan-out distribution network for reaching many concentrators from each data switching module. Distributed control of the space division switch permits several million connection and disconnection actions to be performed each second, while the pipelined and parallel operation within the control means permits each of the 256 switching modules to process at least 50,000 transactions per second. The data switching modules chain groups of incoming packets destined for a common outlet of the space division switch so that only one connection in that switch is required for transmitting each group of chained packets from a data switching module to a concentrator.

54348544, Jul 18, 1995

Dec 27, 1993

8/174482

Joseph P. Focarile - Gladstone NJ
Jayant G. Hemmady - Naperville IL
Ronald A. Spanke - Wheaton IL
Hsien-Chuen Yu - Naperville IL

AT&T Corp. - Murray Hill NJ

H04J 324

370 601

A system and method for delivering packetized data representing radio signals to and from cell sites, and to and from a destination point via a fast packet network. Each cell site includes an interface for packetizing the radio signals and transmitting the packetized data to its destination. The destination could be a delivery point at a switch connected to the telephone network, which then converts the packetized data into a form usable by the telephone network. Alternatively, the destination point could be another cell site, which then depacketizes the radio signal and retransmits the radio signal to another wireless communication device without connecting to the telephone network.

48721603, Oct 3, 1989

Aug 30, 1988

7/238309

Jayant G. Hemmady - Naperville IL
William P. Lidinsky - Naperville IL
Scott B. Steele - Naperville IL
Werner Ulrich - Glen Ellyn IL
Ronald C. Weddige - Western Springs IL

American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ

H04Q 1104

370 60

A high capacity metropolitan area network (MAN) is described. Data traffic from users is connected to data concentrators at the edge of the network, and is transmitted over fiber optic data links to a hub where the data is switched. The hub includes a plurality of data switching modules, each having a control means, and each connected to a distributed control space divisison switch. Advantageously, the data switching modules, whose inputs are connected to the concentrators, perform all checking and routing functions, while the 1024. times. 1024 maximum size space division switch, whose outputs are connected to the concentrators, provides a large fan-out distribution network for reaching many concentrators from each data switching module. Distributed control of the space division switch permits several million connection and disconnection actions to be performed each second, while the pipelined and parallel operation within the control means permits each of the 256 switching modules to process at least 50,000 transactions per second. The data switching modules chain groups of incoming packets destined for a common outlet of the space division switch so that only one connection in that switch is required for transmitting each group of chained packets from a data switching module to a concentrator.

48721573, Oct 3, 1989

Mar 31, 1988

7/175694

Jayant G. Hemmady - Naperville IL
William P. Lidinsky - Naperville IL
Robert K. Nichols - Glen Ellyn IL
Gaylord W. Richards - Naperville IL
Gary A. Roediger - Downers Grove IL
Scott B. Steele - Naperville IL
Ronald C. Weddige - Western Springs IL
Bruce R. Zelle - Naperville IL

American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ

H04Q 1104

370 60

A high capacity metropolitan area network (MAN) is described. Data traffic from users is connected to data concentrators at the edge of the network, and is transmitted over fiber optic data links to a hub where the data is switched. The hub includes a plurality of data switching modules, each having a control means, and each connected to a distributed control space division switch. Advantageously, the data switching modules, whose inputs are connected to the concentrators, perform all checking and routing functions, while the 1024. times. 1024 maximum size space division switch, whose outputs are connected to the concentrators, provides a large fan-out distribution network for reaching many concentrators from each data switching module. Distributed control of the space division switch permits several million connection and disconnection actions to be performed each second, while the pipelined and parallel operation within the control means permits each of the 256 switching modules to process at least 50,000 transactions per second. The data switching modules chain groups of incoming packets destined for a common outlet of the space division switch so that only one connection in that switch is required for transmitting each group of chained packets from a data switching module to a concentrator.