Credit-based processor sharing for decoupled delay and bandwidth allocation

In this letter, we propose a Credit-based Processor Sharing (CPS) approach for decoupled allocation of delay and bandwidth. For bandwidth guarantees, a CPS system serves traffic flows in proportion to their service weights. F or delay guarantees, on the other hand, a CPS system allows real-time flows to temporarily borrow bandwidth from nonreal-time flows using service cred its. This borrowing mechanism boosts the delay performance of real-time flo ws without increasing their long-term bandwidth requirements. By systematic ally regulating service credits of real-time flows, nonreal-time flows are protected for their aggregate long-term bandwidth share.