Please wait a minute...
FITEE
Front. Inform. Technol. Electron. Eng.  2017, Vol. 18 Issue (2): 253-261    DOI: 10.1631/FITEE.1601414
Regular Papers     
Joint throughput and transmission range optimization for triple-hop networks with cognitive relay
Cheng Zhao, Wan-liang Wang, Xin-wei Yao, Shuang-hua Yang
College of Computer Science & Technology, Zhejiang University of Technology, Hangzhou 310023, China; Department of Computer Science, Loughborough University, Loughborough LE11 3TU, UK
Download:     PDF (0 KB)     
Export: BibTeX | EndNote (RIS)      

Abstract  The optimization of the network throughput and transmission range is one of the most important issues in cognitive relay networks (CRNs). Existing research has focused on the dual-hop network, which cannot be extended to a triple-hop network due to its shortcomings, including the limited transmission range and one-way communication. In this paper, a novel, triple-hop relay scheme is proposed to implement time-division duplex (TDD) transmission among secondary users (SUs) in a three-phase transmission. Moreover, a superposition coding (SC) method is adopted for handling two-receiver cases in triple-hop networks with a cognitive relay. We studied a joint optimization of time and power allocation in all three phases, which is formulated as a nonlinear and concave problem. Both analytical and numerical results show that the proposed scheme is able to improve the throughput of SUs, and enlarge the transmission range of primary users (PUs) without increasing the number of hops.

Key words： Decode-and-forward (DF)      Triple-hop      Cognitive relay networks (CRNs)      Time and power allocation      Superposition coding     
Received: 14 July 2016      Published: 10 February 2017
CLC:  TN925  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Cheng Zhao
Wan-liang Wang
Xin-wei Yao
Shuang-hua Yang
Cite this article:

Cheng Zhao, Wan-liang Wang, Xin-wei Yao, Shuang-hua Yang. Joint throughput and transmission range optimization for triple-hop networks with cognitive relay. Front. Inform. Technol. Electron. Eng., 2017, 18(2): 253-261.

URL:

http://www.zjujournals.com/xueshu/fitee/10.1631/FITEE.1601414     OR     http://www.zjujournals.com/xueshu/fitee/Y2017/V18/I2/253

[1] Feng Shu, Xiao-hui Huang, Jin-song Hu, Ting-ting Liu, Ri-qing Chen, Xiao-hu You, Jun Li, Jin Wang. Spatial channel pairing based coherent combining for relay networks[J]. Front. Inform. Technol. Electron. Eng., 2016, 17(9): 938-945.
[2] Ji-Hoon Park, Byung-Seo Kim. Reliable beacon transmission based MAC protocol for LR-WPANs over WLAN interferences[J]. Front. Inform. Technol. Electron. Eng., 2014, 15(6): 470-481.