Tuning scavenger service bottom bandwidth in a logarithmical way

This paper presents a LWRRQ (logarithmic weighted round robin queuing) algorithm for scavenger service, which is a non-elevated QoS technique proposed by the Internet2 project. The algorithm estimates active scavenger service flow number by the number of flows having packets buffered and accordingly tunes the bottom bandwidth allocated for SS flows logarithmically to reach better performance and robustness. Simulations show that it provides more appropriate bottom bandwidth guarantee for scavenger service flows when protecting best-effort flows well.