Intermittently Available Server, Priority Queues
It is frequently the case in communications systems that transmission facilities are shared among a number of different sources. In Chapter 5, for example, time-division multiplexing is used to distribute transmission capacity among the sources sharing the same line. The allocation of resources in this case is fixed and is therefore unresponsive to the instantaneous needs of users. In this and in subsequent chapters we shall be examining techniques for sharing resources that respond to variations in instantaneous traffic levels. In this chapter sharing will be effected by granting priority to one class of users over another. As we shall see presently, this mechanism does not necessarily mean inequitable service.
KeywordsAverage Delay Busy Period Priority Queue Priority Class Voice Call
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