Deadline credit scheduling policy for prerecorded sources

In this paper a scheduling policy is proposed, called the deadline credit (DC) policy, which focuses on the efficient scheduling of prerecorded continuous media traffic. Its objectives are (a) to utilize all (if possible) of the available capacity by allocating bandwidth dynamically to a number of data streams, (b) to distribute the available bandwidth fairly between all competing data streams and (c) to maximise the number of application data units (ADUs) that are served by always giving priority to the one with the shortest time to expiration. Numerical results are presented and the induced ADUs loss rates under the proposed policy are compared against those of some alternative schemes.