PCC Priority: A Priority-Aware Bandwidth Allocation Framework for QUIC

The current version of QUIC (Quick UDP Internet Connection) does not allow for prioritized bandwidth allocation of multiple streams. In this letter, we propose a novel framework, Performance-oriented Congestion Control Priority (PCC Priority), to support priority-aware bandwidth allocation of QUIC streams. Our framework incorporates stream priorities into the utility function of PCC to allocate bandwidth proportionally according to the stream priorities. We also provide an equilibrium analysis of PCC Priority and prove that it can allocate bandwidth proportionally based on stream priorities. Our ns-3 simulation results show that PCC Priority outperforms the state-of-the-art protocols in adhering to the priority settings of streams in QUIC. In particular, PCC Priority allocates bandwidth to streams at a ratio that is close to the ratio of their priorities and maintains competitive high throughput, low latency, and high loss tolerance.