cDERSA: Cognitive D2D Enabled Relay Selection Algorithm to Mitigate Blind-Spots in 5G Cellular Networks

Blind-spots, where wireless signals do not reach within the coverage range, often emerge in a dynamic environment due to obstacles, geographical location or mobility of cellular users (CUs). Thus greatly reducing overall system performance terms and throughput. Relay-aided cognitive Device (cD2D) communication underlying 5G network can help mitigate blind-spots. Cognitive capability helps D2D acquire spectrum opportunistically for proximity establish semi-independent network, which only offloads 5G-New Radio (NR) base station but also enhances performance. In this work, we have developed relay-aided that CUs falling into blind-spots retain access increase coverage. Relay selection requires mutual consent between relay device blind-spot. The in-coverage devices are tempted act as relays through incentive-based mechanism. For enhanced suitable match among is required. cD2D enabled algorithm (cDERSA) proposed user (cDU), CU blind-spot, establishes relayed link 5G-NR gNodeB. All cDUs well relays, i.e. (cDRs), first scan their surroundings capable based on multi-criteria objective functions, build priority table. A stable marriage problem formulated solved using unique, stable, distributed, efficient matching Gale-Shapley algorithm. new incentive mechanism keep motivated share resources. Simulation performed results show improvement throughput average satisfaction, validates our cDERSA.