Ion-exchanged waveguide add/drop filter - Electronics Letters
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چکیده
queueing model. We define a new concept of trunk as a group of voice traffic with identical destination and DSCP. It is assumed that at least one trunk should be established between the ingress router and corresponding egress router. Each trunk has a different voice traffic arrival rate and mean service timc. We assume that there are P types of queues. In a queue of typc lc (k = I, 2, ..., P), there are /nfc servers and no waiting room. Packet loss occurs in two ways. I n one, a packet arrives when its trunk is full; in the other, the trunk is empty but the reservation at the second step fails on arrival. We denote the blocking probability of packets arriving in trunks of type k in the former and the latter cases by Pjr:,!s (IC) and PI:,!’, respectively. P;(:,:T ( k ) . pfc = h,hf, denotes the traffic intensity in a trunk of type k .
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