Principles and Practices of Interconnection Networks

CHAPTER 15

Quality of Service

Previously, we focused on increasing the efficiency of resource allocation, such as

achieving higher bandwidth and lower latency. However, even with perfect routing

and flow control, situations remain in which the requests for a particular resource

will exceed its capacity. In this regime, our attention shifts from efficiently allocating

the resource to fairly allocating the resource according to to some service policies.

In this chapter, we focus on both the typical services requested by network clients

and the mechanisms for providing these services. Broadly speaking, we refer to these

topics as providing QoS.

15.1 Service ...