Outage Performance of Power Beacon-Aided Multi-Hop Cooperative Cognitive Radio Protocol Under Constraint of Interference and Hardware Noises

Abstract

In this paper, we evaluate end-to-end outage probability of a multi-hop decode-and-forward relaying protocol in underlay cognitive radio network. In the proposed protocol, named COOP, secondary nodes including source and relays have to harvest radio-frequency energy from multiple secondary power beacons, and adjust their transmit power, follows a pre-determined interference threshold given by multiple primary users. To enhance the outage performance for the secondary network under an joint constraint of the interference threshold, Rayleigh fading channel and hardware noises caused by imperfect transceiver hardware, the secondary relays on the source-destination path cooperate to forward the source data to the destination. Particularly, they attempt to receive the source data from their previous nodes, and forward it to the secondary destination if requested. Moreover, whenever the destination cannot receive the source data successfully, a successful relay that has the shortest distance to the destination is selected for retransmission. Due to usage of the cooperative transmission, the proposed COOP protocol obtains better performance, as compared with the corresponding multi-hop relaying one (denoted DIRECT) which only uses direct transmission at each hop. We evaluate the outage performance of COOP and DIRECT via both simulation and theory. The obtained results present a significant performance enhancement, as comparing COOP with DIRECT.

Performance Evaluation Of Multi-Hop Relaying IoTs Networks Using Hop-By-Hop Cooperative Transmission Under Impact of Co-channel Interference

“…In [22]- [28], the authors proposed diversity-aided MHR models to further enhance performance for the MHR networks. Particularly, the authors of [22]- [25] measured e2e outage probability (OP) of cooperative multi-hop relaying schemes, in which the source and relay nodes cooperate together to exploit the spatial diversity. However, it is too difficult to deploy these schemes into the IoTs networks because of a requirement of high synchronization and high storage capacity at the relays.…”