PIQIRCP Design and Analysis of RateBased Explicit Congestion Control.pdf

PIQI-RCP: Design and Analysis of Rate-Based Explicit Congestion Control Saurabh Jain and Dmitri Loguinov Texas AM University, College Station, TX 77843 Email: saujain@, dmitri@ Abstract—Recent research has created a significant interest inserted into headers of all passing packets and later com- [18], [19] in the design and development of a new global-scale municated to sources in acknowledgments. Explicit feedback communication network that can overcome the limitations of provides more accurate congestion information to end-hosts the current Internet. Among the many directions for improving networking technology, recent pursuit to design better flow and allows them to adjust their congestion window size or control has led to the emergence of explicit congestion control sending rate with much better results, often leading to high methods that solicit active feedback from intermediate routers link utilization, max-min fairness, and zero packet loss. [5], [11], [22], [25], [26]. As a step towards understanding these Among several recent proposals, Rate Control Protocol methods, we analyze stability and transient performance of Rate (RCP) [5] is a simple method that achieves max-min fairness Control Protocol (RCP) [5], which is a recent method that aims to emulate processor sharing and achieve quick flow completion. in the steady-state and maintains close-to-optimal average However, we find that RCP can become unstable in certain flow completion time (AFCT). RCP requires lower per-packet topologies and may exhibit very h