Providing End-to-End Guaranteed QoS in A-Serv Architecture

QoS architectures define how routers process packets to ensure that QoS service guarantees are enforced. Existing QoS architectures such as Integrated Services (IntServ), Differentiated Services (DiffServ), and Dynamic Packet State (DPS) share one common property that the packet structure and the function of the routers are closely connected. A-Serv was proposed to decouple such connection between packet structure and router functions. In A-Serv, packets carry as much information as possible, while routers process packets as detailed as possible until their load burden prohibits. In this paper, we propose a new protocol that can be used in A-Serv to provide scalable adaptive service and end-to-end guaranteed QoS. Simulation results show that the new protocol can provide better guaranteed QoS to data flows than DiffServ and can ensure end- to-end per-flow service to selected traffic.