Supporting Real-Time ...

This paper proposes mechanisms to support real time service in an ISPN. It makes distinction that some real time applications can adapt to the current network condition and do not have a hard bound on the latency like the rest of the real time applications. Because of this distinction, the paper proposes WFQ for the intolerable applications which focuses on isolation of service class and FIFO+ to minimize delay bound. It also proposes a way to combine the two elegantly into a unified framework.

In addition, the paper also discusses the importance of pricing in providing QoS in their architecture. In current Internet architecture, it is difficult to argue which one service is more important than other services and therefore it is an important reason why QoS is not widely deployed today.

Unfortunately, the architecture proposed requires an overhaul of Internet architecture, or at least at the backbone level. This is a very expensive task to undertake and will not provide the benefit it promises until everyone adopts these QoS control measures.