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Newbridge Networks Corporation

Stanley P Sassower

Walter Clark Milliken

Philip P Carvey

Craig Partridge

Landis C Rogers

Ronald L Pettyjohn

Steven Kohalmi

Brian T Mayo

Joseph N Horowitz

A computer system for transmitting packets includes a manager and scheduling elements for managing the transmission of the packets over one or more logical channels. The computer system can prioritize the transmission of packets based on the type of traffic and maintain quality of service (QoS) characteristics associated with a logical channel. In addition, the computer system can execute a threading process to ensure the efficient and timely transmission of certain types of packets without using any complex mathematical operations.

System and method for scheduling and rescheduling the transmission of cell objects of different traffic types

A network infrastructure comprises a number of connective devices (routers, repeaters, bridges, etc.) to form a communication network for a plurality of end nodes. Message packets originating with an end node are assigned an input virtual network and workgroup identification at the port at which the packet enters the network. This assigned input virtual network and workgroup identification is compared, at each port from which the packet can exit the network infrastructure, with output virtual network and workgroup identification assigned the particular port. If the input virtual network information does not match the output virtual network information, the packet is prohibited from exiting that port. Even if there is a match between the input and output virtual network information, there must also be a match between at least one bit of the input workgroup identification and the output workgroup identification before the packet can exit the port.

Virtual network architecture

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Burlington, MA, United States of America

Stanley P Sassower