Abstract
We consider a cognitive radio network where a secondary user (SU) tries to opportunistically access the channel time unused by the primary users (PUs) to transmit real-time status update packets with delivery deadline. For the radio frequency (RF)-powered SU, the channel occupancy times of the PUs are opportunities to harvest energy, whereas the idle channel times are opportunities to transmit data. Thus, there is a balance characterizing the SU performance in terms of channel occupancy probability of the PUs. We investigate the timely-delivery probability of data packets for the RF-powered SU. Specifically, we reveal the impact of the PU's channel occupancy probability on the timely-delivery probability and packet sojourn time.
| Original language | English |
|---|---|
| Article number | 8873616 |
| Pages (from-to) | 2177-2181 |
| Number of pages | 5 |
| Journal | IEEE Communications Letters |
| Volume | 23 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 2019 |
Keywords
- censored Markov chain
- Cognitive radio network
- RF energy harvesting
- timely-delivery probability
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