Quoc-Tuan Vien
Middlesex University
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Publication
Featured researches published by Quoc-Tuan Vien.
vehicular technology conference | 2011
Quoc-Tuan Vien; Huan Xuan Nguyen; Jinho Choi; Brian G. Stewart; Huaglory Tianfield
This paper considers block acknowledgement (BACK) mechanisms in wireless regenerative relay networks. Conventionally, a total of
wireless communications and networking conference | 2016
Kamran Ali; Huan Xuan Nguyen; Purav Shah; Quoc-Tuan Vien; Namadev Bhuvanasundaram
(2N+1)
arXiv: Information Theory | 2017
Tuan Anh Le; Quoc-Tuan Vien; Huan Xuan Nguyen; Derrick Wing Kwan Ng; Robert Schober
BACK packets are required in wireless regenerative
Iet Communications | 2016
Quoc-Tuan Vien; Huan Xuan Nguyen; Arumugam Nallanathan
N
IEEE Transactions on Wireless Communications | 2016
Quoc-Tuan Vien; Huan Xuan Nguyen; Ramona Trestian; Purav Shah; Orhan Gemikonakli
-relay networks to acknowledge the data transmission between the source and destination via the relays. In this paper, based on network coding (NC) we propose an efficient BACK scheme to significantly reduce the required acknowledgement load by
Iet Communications | 2013
Quoc-Tuan Vien; Brian G. Stewart; Huaglory Tianfield; Huan Xuan Nguyen
N
Eurasip Journal on Wireless Communications and Networking | 2011
Quoc-Tuan Vien; Le-Nam Tran; Een-Kee Hong
BACK packets. Importantly, by deriving the error probability of the determination of the packets to be retransmitted at the source or relays, it is found that the utilised NC helps improve the reliability of BACK transmissions. Furthermore, some asymptotic scenarios of the forward links are considered and a general expression of error probability in multi-relay networks is derived for each scenario. Finally, simulation results are shown to verify the analytical findings.
IEEE Transactions on Wireless Communications | 2015
Duc To; Huan Xuan Nguyen; Quoc-Tuan Vien; Li-Ke Huang
Device to Device (D2D) communication has been proposed as an underlay to Long-Term evolution (LTE) network as a means of harvesting the proximity, reuse and hop gains. However, D2D communication can also serve as a technology for providing public safety and disaster relief services. In this article, the basic concepts of D2D communications are first introduced and then existing fundamental works on disaster communication are discussed. We focus on the performance of the network architecture by utilizing the relay assisted transmission which can effectively enhance the capacity and power saving of the network. We also propose the distance based strategy to reduce the computational complexity and power transmission. Finally, simulation results are provided to verify the proposed architecture.
IEEE Communications Letters | 2015
Tuan Anh Le; Huan Xuan Nguyen; Quoc-Tuan Vien; Mehmet Karamanoglu
In this paper, we propose beamforming schemes to simultaneously transmit data securely to multiple information receivers while transferring power wirelessly to multiple energy-harvesting receivers. Taking into account the imperfection of the instantaneous channel state information (CSI), we introduce a chance-constrained optimization problem to minimize the total transmit power while guaranteeing data transmission reliability, data transmission security, and power transfer reliability. As the proposed optimization problem is non-convex due to the chance constraints, we propose two robust reformulations of the original problem based on safe-convex-approximation techniques. Subsequently, applying semidefinite programming relaxation (SDR), the derived robust reformulations can be effectively solved by standard convex optimization packages. We show that the adopted SDR is tight and thus the globally optimal solutions of the reformulated problems can be recovered. Simulation results confirm the superiority of the proposed methods in guaranteeing transmission security compared to a baseline scheme. Furthermore, the performance of proposed methods can closely follow that of a benchmark scheme where perfect CSI is available for resource allocation.
Telematics and Informatics | 2017
Ramona Trestian; Purav Shah; Huan Xuan Nguyen; Quoc-Tuan Vien; Orhan Gemikonakli; Balbir Barn
This paper investigates cooperative spectrum sensing (CSS) in cognitive wireless radio networks (CWRNs). A practical system is considered where all channels experience Nakagami-