TY  - EJOU
AU  - Liu, Jian 
AU  - Wang, Lei 
AU  - Zhao, Changming 
AU  - Yang, Alan 

TI  - Cooperative Relay Selection Mechanism in Multi-Hop Networks
T2  - Computers, Materials \& Continua

PY  - 2020
VL  - 63
IS  - 1
SN  - 1546-2226

AB  - In this paper, we consider a three-hop relay system based on interference cancellation technique in Underlay cognitive radio (CR) network. Although underlay CR has been shown as a promising technique to better utilize the source of primary users (PUs), its secondary performance will be severely degraded. On one hand, by adapting the Underlay spectrum sharing pattern, secondary users (SUs) would observe the strict power constraints and be interfered by primary users. On the other hand, limited transmit power results in limited transmission range, which greatly degrade the secondary transmission capacity. To solve the problems above, we propose an interference cancellation protocol for multi-hop wireless communication networks in underlay CR, which could develop the long-distance transmission performance and improve the transmission efficiency significantly. As simulation results shows, proposed scheme significantly reduce the secondary outage probability and increase the secondary diversity than the traditional cases.
KW  - Cognitive relay networks
KW  -  interference cancellation
KW  -  power control
KW  -  secondary outage probability

DO  - 10.32604/cmc.2020.06074