The Assured Services architecture relies on packet marking mechanism at the edge router
and queue management mechanism at the core router.Due to its self-adaptive congestion
TCP flows are much more sensitive to packet drops
especially to multiple drops
therefore when network congestion happened
the throughput of TCP flows is greatly influenced.We design a new marker called CASR3CM (Congestion Aware Single Rate-Three Color Marker).The simulation results indicate that the marker not only improves the throughput of AS TCP flow
the stability of the throughput
but also improves the fairness of bandwidth sharing between AS TCP flows.