Figure 8From: Priority queueing models for cognitive radio networks with traffic differentiationCycles and holding periods for the LP packets in the discipline of preemptive in case of failure (FP). The LP packet can hold the channel for three cycles. However in a preemptive scheme (Pr) (not shown here), it can keep the channel for two complete cycles and releases the channel in the middle of the third cycle if there is an HP arrival (section 1).Back to article page