Full Text:   <630>

Summary:  <324>

CLC number: TN925

On-line Access: 2017-02-10

Received: 2016-07-14

Revision Accepted: 2016-11-10

Crosschecked: 2017-01-03

Cited: 0

Clicked: 1933

Citations:  Bibtex RefMan EndNote GB/T7714


Wan-liang Wang


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Frontiers of Information Technology & Electronic Engineering  2017 Vol.18 No.2 P.253-261


Joint throughput and transmission range optimization for triple-hop networks with cognitive relay

Author(s):  Cheng Zhao, Wan-liang Wang, Xin-wei Yao, Shuang-hua Yang

Affiliation(s):  College of Computer Science & Technology, Zhejiang University of Technology, Hangzhou 310023, China; more

Corresponding email(s):   zhaoc@zjut.edu.cn, wwl@zjut.edu.cn

Key Words:  Decode-and-forward (DF), Triple-hop, Cognitive relay networks (CRNs), Time and power allocation, Superposition coding

Cheng Zhao, Wan-liang Wang, Xin-wei Yao, Shuang-hua Yang. Joint throughput and transmission range optimization for triple-hop networks with cognitive relay[J]. Frontiers of Information Technology & Electronic Engineering, 2017, 18(2): 253-261.

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DOI - 10.1631/FITEE.1601414

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.




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