Efficient routing schemes are essential if Network on

Chip (NoC) architectures are to be used for implementing

multi-core systems for real-time multi-media applications.

These systems will be characterized by internal communication

traffic which is a mix of traffic requiring guaranteed

throughput (GT) and other traffic requiring some other QoS

properties like latency and less packet drops. Communication

resources are generally reserved for providing GT

performance. In this paper we propose a dynamic scheme for

improving packet drop probability of other traffic by

intelligently utilizing the under-utilized reserved

communication resources of GT traffic. We demonstrate the

effectiveness of our scheme by simulation.