Extension of virtual path concept for QOS guarantee

A challenge in B-ISDN is effective provision of QOS guarantees. This paper proposes a scheme for guaranteeing QOS in the B-ISDN/ATM framework while utilizing resources. It addresses the key open issue involved in this challenge and poses a solution different from the current approaches. The fundamental idea of the scheme is to extend the virtual path concept to include a reservation of time slots at switching nodes by each virtual path. Cells for a session are divided into two classes at the access node: those that are guaranteed transmission within the reserved time slots and those that are discardable. Through this global and active control along virtual paths. Data transfer in a network resembles writing to input ports of a personal computer with deterministic delay and zero loss. By implementing an architecture as layers, resources are utilized without sacrificing processing time on fly.<>