Lecture22_2up

Lecture22_2up - ECE-547 Introduction to Computer...

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1 Purdue University ECE ECE -547 547 Introduction to Computer Introduction to Computer Communication Networks Communication Networks Instructor: Instructor: Xiaojun Xiaojun Lin Lin Lecture Lecture 22 22 Purdue University Open Open Queueing Queueing Networks Networks ¾ Customer arrive and leave the network at one or more points in the network ¾ Total arrival rate = total departure rate • True if system is stable AND • If no loss occurs within the network ¾ In general (if loss is allowed): • Total departure rate = (total arrival rate) × (1-P L ) ¾ Buffer occupancy distribution P n or end-to-end delay bounds are needed for: • Network dimensioning/network design • Traffic management • Routing
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2 Purdue University Open Open Queueing Queueing Networks Networks ¾ Earlier in the single queue case, we related various statistics to P n , P{n packets in a queue}, similarly we can relate these quantities to: () 12 { , ,..., } m P nP n n n = = P{n 1 customers at node 1, n 2 at node 2, … n m at node m} ¾ To Solve for
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Lecture22_2up - ECE-547 Introduction to Computer...

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