Open Access

ARTICLE

Cooperative Relay Selection Mechanism in Multi-Hop Networks

Jian Liu¹, Lei Wang¹, Changming Zhao^{2, 3, *}, Alan Yang⁴

1 University of Science and Technology Beijing, Beijing, 100083, China.
2 School of Computer Science, Chengdu University of Information Technology, Chengdu, 610225, China.
3 College of Computer Science, Sichuan University, Chengdu, 610041, China.
4 Amphenol Assemble Tech, Houston, TX 77070, USA.

* Corresponding Author: Changming Zhao. Email: .

Computers, Materials & Continua 2020, 63(1), 119-130. https://doi.org/10.32604/cmc.2020.06074

Received 18 January 2019; Accepted 18 March 2019; Issue published 30 March 2020

Abstract

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.

---

Keywords

---