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Tran, Hung Vinh
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Publications (10 of 24) Show all publications
Vo, V. N., Nguyen, T. G., So-In, C. & Tran, H. V. (2020). Outage Performance Analysis of Energy Harvesting Wireless Sensor Networks for NOMA Transmissions. Mobile Networks and Applications , 25(1), 23-41
Open this publication in new window or tab >>Outage Performance Analysis of Energy Harvesting Wireless Sensor Networks for NOMA Transmissions
2020 (English)In: Mobile Networks and Applications , ISSN 1383-469X, E-ISSN 1572-8153, Vol. 25, no 1, p. 23-41Article in journal (Refereed) Published
Abstract [en]

In this paper, we investigate radio frequency (RF) energy harvesting (EH) in wireless sensor networks (WSNs) using non-orthogonal multiple access (NOMA) uplink transmission with regard to a probable secrecy outage during the transmission between sensor nodes (SNs) and base station (BS) in the presence of eavesdroppers (EAVs). In particular, the communication protocol is divided into two phases: 1) first, the SNs harvest energy from multiple power transfer stations (PTSs), and then, 2) the cluster heads are elected to transmit information to the BS using the harvested energy. In the first phase, we derive a 2D RF energy model to harvest energy for the SNs. During the second phase, the communication faces multiple EAVs who attempt to capture the information of legitimate users; thus, we propose a strategy to select cluster heads and implement the NOMA technique in the transmission of the cluster heads to enhance the secrecy performance. For the performance evaluation, the exact closed-form expressions for the secrecy outage probability (SOP) at the cluster heads are derived. A nearly optimal EH time algorithm for the cluster head is also proposed. In addition, the impacts of system parameters, such as the EH time, the EH efficiency coefficient, the distance between the cluster heads and the BS, and the number of SNs as well as EAVs on the SOP, are investigated. Finally, Monte Carlo simulations are performed to show the accuracy of the theoretical analysis; it is also shown that the secrecy performance of NOMA in RF EH WSN can be improved using the optimal EH time.

Place, publisher, year, edition, pages
SPRINGER, 2020
Keywords
Energy harvesting, Wireless sensor networks, Non-orthogonal multiple access, Physical layer security
National Category
Earth and Related Environmental Sciences
Identifiers
urn:nbn:se:mdh:diva-47223 (URN)10.1007/s11036-018-1188-7 (DOI)000513451700004 ()
Available from: 2020-03-05 Created: 2020-03-05 Last updated: 2020-03-05Bibliographically approved
Quach, T. X., Tran, H. V., Uhlemann, E. & Truc, M. T. (2020). Secrecy performance of cooperative cognitive radio networks under joint secrecy outage and primary user interference constraints. IEEE Access, 8, 18442-18455, Article ID 8964376.
Open this publication in new window or tab >>Secrecy performance of cooperative cognitive radio networks under joint secrecy outage and primary user interference constraints
2020 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 8, p. 18442-18455, article id 8964376Article in journal (Refereed) Published
Abstract [en]

In this paper, we investigate the secrecy performance of a Cooperative Cognitive Radio Network (CCRN) in the presence of an eavesdropper (EAV). The secondary users (SUs) are subject to three constraints which include peak transmit power level and interference limitation with respect to the primary user (PU) as well as secrecy outage constraints due to the EAV. Secrecy outage is achieved when the EAV cannot decode the targeted signal, but communications in the secondary network is still possible (non-zero capacity exists). Approximation expressions of the secrecy outage probability and the probability of non-zero secrecy capacity are derived to evaluate the secrecy performance. Monte Carlo simulations are provided to examine the accuracy of the derived approximation expressions. Based on this, power allocation policies for the SUs are derived, satisfying all the constraints while maximizing the secrecy performance as well as the quality of service performance of the secondary network. It can be concluded that with knowledge of the channel state information (CSI) of the EAV it is possible to calculate the optimal value for the secrecy outage threshold of the secondary user (SU) which in turn allows maximizing the secrecy performance. Most interestingly, our numerical results illustrate that the secrecy performance of the system is much improved when the parameters obtained using the CSI of the EAV are calculated optimally. Thence, the system can adjust the power allocation so that no eavesdropping occurs even without reducing quality of service (QoS) performance compared to a network without any EAV.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2020
Keywords
cooperative cognitive radio networks, Physical layer security, power allocation, secrecy capacity, secrecy outage probability, Channel state information, Cognitive radio, Intelligent systems, Monte Carlo methods, Network layers, Probability, Quality of service, Radio, Radio interference, Radio systems, Power allocations, Secrecy outage probabilities, Outages
National Category
Economics and Business
Identifiers
urn:nbn:se:mdh:diva-47226 (URN)10.1109/ACCESS.2020.2968325 (DOI)2-s2.0-85079762873 (Scopus ID)
Available from: 2020-03-05 Created: 2020-03-05 Last updated: 2020-03-05Bibliographically approved
Nhan Vo, V., So-In, C., Tran, H. V., Tran, D. D., HENG, S., PHET, A. & ANH-NHAT, N. (2019). On Security and Throughput for Energy Harvesting Untrusted Relays in IoT Systems Using NOMA. IEEE Access, 2(1), 1-30
Open this publication in new window or tab >>On Security and Throughput for Energy Harvesting Untrusted Relays in IoT Systems Using NOMA
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2019 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 2, no 1, p. 1-30Article in journal (Refereed) Published
Abstract [en]

In this paper, we analyze the secrecy and throughput of multiple-input single-output (MISO) energy harvesting (EH) Internet of Things (IoT) systems, in which a multi-antenna base station (BS) transmits signals to IoT devices (IoTDs) with the help of relays. Specifically, the communication process is separated into two phases. In the first phase, the BS applies transmit antenna selection (TAS) to broadcast the signal to the relays and IoTDs by using non-orthogonal multiple access (NOMA). Here, the relays use power-splitting-based relaying (PSR) for EH and information processing. In the second phase, the selected relay employs the amplify-and-forward (AF) technique to forward the received signal to the IoTDs using NOMA. The information transmitted from the BS to the IoTD risks leakage by the relay, which is able to act as an eavesdropper (EAV) (i.e., an untrusted relay). To analyze the secrecy performance, we investigate three schemes: random-BS-best-relay (RBBR), best-BS-random-relay (BBRR), and best-BS-best-relay (BBBR). The physical layer secrecy (PLS) performance is characterized by deriving closed-form expressions of secrecy outage probability (SOP) for the IoTDs. A BS transmit power optimization algorithm is also proposed to achieve the best secrecy performance. Based on this, we then evaluate the system performance of the considered system, i.e., the outage probability and throughput. In addition, the impacts of the EH time, the power-splitting ratio, the numbers of BS antennas, and the numbers of untrusted relays on the SOP and throughput are investigated. The Monte Carlo approach is applied to verify our analytical results. Finally, the numerical examples indicate that the system performance of BBBR is greater than that of RBBR and BBRR.

Place, publisher, year, edition, pages
United States: IEEE, 2019
National Category
Engineering and Technology Computer Systems
Identifiers
urn:nbn:se:mdh:diva-46267 (URN)10.1109/ACCESS.2019.2946600 (DOI)000497160500028 ()2-s2.0-85077742175 (Scopus ID)
Projects
Serendipity - Secure and dependable platforms for autonomy
Available from: 2019-12-12 Created: 2019-12-12 Last updated: 2020-01-23Bibliographically approved
Vo, V. N., So-In, C., Tran, D.-D. -. & Tran, H. V. (2019). Optimal System Performance in Multihop Energy Harvesting WSNs Using Cooperative NOMA and Friendly Jammers. IEEE Access, 7, 125494-125510, Article ID 8824086.
Open this publication in new window or tab >>Optimal System Performance in Multihop Energy Harvesting WSNs Using Cooperative NOMA and Friendly Jammers
2019 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 7, p. 125494-125510, article id 8824086Article in journal (Refereed) Published
Abstract [en]

In this paper, we investigate the system performance of multihop energy harvesting (EH) wireless sensor networks (WSNs) with imperfect channel state information (CSI) using cooperative non-orthogonal multiple access (NOMA) and friendly jammers in the presence of multiple passive eavesdroppers (EAVs). Specifically, we propose a two-phase communication protocol consisting of EH and information transmission (IT). In the first phase, relays in all clusters harvest energy from power transfer station (PTS) signals. In the first time slot of the second phase, the gateway simultaneously broadcasts information and interference signals. In the subsequent time slots, a relay acting as a friendly jammer in each cluster uses the harvested energy to send an interference signal. Simultaneously, another EH relay applies the NOMA technique to transmit the information signal according to an optimal scheduling scheme based on the maximum signal-to-interference-plus-noise ratio (SINR) of a far user (MSm) and a near user (MSn). To ensure security performance, we propose an algorithm for determining the EH time constraint for a friendly jammer. Additionally, closed-form expressions for the outage probability and throughput of the considered system are derived. Accordingly, an optimal power allocation coefficient algorithm is proposed to achieve throughput fairness for pairs of users. The results of the mathematical analysis are verified by Monte Carlo simulations. Finally, the numerical results demonstrate that the MSn scheme is recommended for guaranteeing throughput fairness for pairs of users. 

Keywords
Energy harvesting, friendly jammer, imperfect CSI, multihop wireless sensor networks, NOMA
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:mdh:diva-45369 (URN)10.1109/ACCESS.2019.2939385 (DOI)000487080300003 ()2-s2.0-85072584427 (Scopus ID)
Available from: 2019-10-03 Created: 2019-10-03 Last updated: 2019-10-11Bibliographically approved
Phuoc Van, N. T., Tang, L., Tran, H. V., Hasan, F., Minh, N. D. & Mukhopadhyay, S. (2019). Outage probability of vital signs detecting radar sensor system. In: Proceedings of the International Conference on Sensing Technology, ICST: . Paper presented at International Conference on Sensing Technology, ICST (pp. 358-362). IEEE Computer Society, Article ID 8603556.
Open this publication in new window or tab >>Outage probability of vital signs detecting radar sensor system
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2019 (English)In: Proceedings of the International Conference on Sensing Technology, ICST, IEEE Computer Society , 2019, p. 358-362, article id 8603556Conference paper, Published paper (Refereed)
Abstract [en]

Monitoring vital signs using microwave signals has significant applications in biology, and also for finding survivors under debris during natural hazards. The vital signs detection radar sensor system consists of a transmitter and a receiver. This system can be considered as a wireless system. In the wireless system, the outage probability is a crucial factor to evaluate the reliability of the system. This work investigates the outage probability (OP) of a radar sensor system under the Nakagami-m environment. The dependence of the OP on different parameters like operating frequency, distance to the measured object, transmitter power, and the leakage between transmitter and receiver antennae is examined. The theoretical model for the OP is validated with simulation results through various environments.

Place, publisher, year, edition, pages
IEEE Computer Society, 2019
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:mdh:diva-42757 (URN)10.1109/ICSensT.2018.8603556 (DOI)000458872800067 ()2-s2.0-85061490345 (Scopus ID)9781538651476 (ISBN)
Conference
International Conference on Sensing Technology, ICST
Available from: 2019-02-22 Created: 2019-02-22 Last updated: 2019-03-07Bibliographically approved
Quach, T., Tran, H. V., Uhlemann, E., Kaddoum, G. & Tran, Q. (2019). Power allocation policy and performance analysis of secure and reliable communication in cognitive radio networks. Wireless networks, 25(4), 1477-1489
Open this publication in new window or tab >>Power allocation policy and performance analysis of secure and reliable communication in cognitive radio networks
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2019 (English)In: Wireless networks, ISSN 1022-0038, E-ISSN 1572-8196, Vol. 25, no 4, p. 1477-1489Article in journal (Refereed) Published
Abstract [en]

This paper investigates the problem of secure and reliable communications for cognitive radio networks. More specifically, we consider a single input multiple output cognitive model where the secondary user (SU) faces an eavesdropping attack while being subject to the normal interference constraint imposed by the primary user (PU). Thus, the SU must have a suitable power allocation policy which does not only satisfy the constraints of the PU but also the security constraints such that it obtains a reasonable performance for the SU, without exposing information to the eavesdropper. We derive four power allocation policies for different scenarios corresponding to whether or not the channel state information of the PU and the eavesdropper are available at the SU. Further, we introduce the concept secure and reliable communication probability (SRCP) as a performance metric to evaluate the considered system, as well as the efficiency of the four power allocation policies. Finally, we present numerical examples to illustrate the power allocation polices, and the impact of these policies on the SRCP of the SU. 

National Category
Computer Systems
Identifiers
urn:nbn:se:mdh:diva-43118 (URN)10.1007/s11276-017-1605-z (DOI)000463885400004 ()2-s2.0-85033487528 (Scopus ID)
Projects
SafeCOP - Safe Cooperating Cyber-Physical Systems using Wireless Communication
Funder
EU, Horizon 2020, 692529 
Available from: 2019-04-16 Created: 2019-04-16 Last updated: 2019-09-20Bibliographically approved
Dao, V.-L., Tran, H. V., Girs, S. & Uhlemann, E. (2019). Reliability and Fairness for CANT Communication Based on Non-Orthogonal Multiple Access. In: 2019 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS WORKSHOPS (ICC WORKSHOPS): . Paper presented at IEEE International Conference on Communications (ICC), MAY 20-24, 2019, Shanghai, PEOPLES R CHINA. IEEE
Open this publication in new window or tab >>Reliability and Fairness for CANT Communication Based on Non-Orthogonal Multiple Access
2019 (English)In: 2019 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS WORKSHOPS (ICC WORKSHOPS), IEEE , 2019Conference paper, Published paper (Refereed)
Abstract [en]

Recently, communication using unmanned aerial vehicles (LAVO as relay nodes has been considered beneficial for a number of applications. Moreover, nomorthogonM multiple access (NONIA) with users being assigned different signal passer levels while sharing the same tune-frequency domain has been found effective to enhance spectrum utilization and provide predictable access to the channel. Thus, in this paper we consider an UAV communication system with NOMA and propose a solution to find the optimal values for the user's power allocation coefficients (PA(s) needed to achieve the required levels of communication reliability. We present a closed-form expression for the PAC of each user and also propose an algori for finding the optimal altitude of the UAV required to satisfy the fairness condition for all users. Finally, we provide numerical mutinies and compare the results tar three types of communication environments.

Place, publisher, year, edition, pages
IEEE, 2019
Series
IEEE International Conference on Communications Workshops, ISSN 2164-7038
National Category
Telecommunications Communication Systems Signal Processing
Identifiers
urn:nbn:se:mdh:diva-45313 (URN)000484917800207 ()978-1-7281-2373-8 (ISBN)
Conference
IEEE International Conference on Communications (ICC), MAY 20-24, 2019, Shanghai, PEOPLES R CHINA
Available from: 2019-09-26 Created: 2019-09-26 Last updated: 2019-09-27Bibliographically approved
Dao, V.-L., Tran, H. V., Girs, S. & Uhlemann, E. (2019). Reliability and Fairness for UAV Communication Based on Non-Orthogonal Multiple Access. In: 2019 IEEE International Conference on Communications Workshops (ICC Workshops): . Paper presented at IEEE International Conference on Communications IEEEICC, 20 May 2019, Shanghai, China. (53)
Open this publication in new window or tab >>Reliability and Fairness for UAV Communication Based on Non-Orthogonal Multiple Access
2019 (English)In: 2019 IEEE International Conference on Communications Workshops (ICC Workshops), 2019, no 53Conference paper, Published paper (Refereed)
Abstract [en]

Recently, communication using unmanned aerial vehicles (UAVs) as relay nodes has been considered beneficial for a number of applications. Moreover, non-orthogonal multiple access (NOMA) with users being assigned different signal power levels while sharing the same time-frequency domain has been found effective to enhance spectrum utilization and provide predictable access to the channel. Thus, in this paper we consider an UAV communication system with NOMA and propose a solution to find the optimal values for the user’s power allocation coefficients (PACs) needed to achieve the required levels of communication reliability. We present a closed-form expression for the PAC of each user and also propose an algorithm for finding the optimal altitude of the UAV required to satisfy the fairness condition for all users. Finally, we provide numerical examples and compare the results for three types of communication environments.

National Category
Engineering and Technology Computer Systems
Identifiers
urn:nbn:se:mdh:diva-45066 (URN)10.1109/ICCW.2019.8757160 (DOI)978-1-7281-2373-8 (ISBN)
Conference
IEEE International Conference on Communications IEEEICC, 20 May 2019, Shanghai, China
Projects
FORA - Fog Computing for Robotics and Industrial Automation
Available from: 2019-08-22 Created: 2019-08-22 Last updated: 2019-08-22Bibliographically approved
Vo, V. N., Tran, H. V., Uhlemann, E., Truong, Q. X., So-In, C. & Balador, A. (2019). Reliable Communication Performance for Energy Harvesting Wireless Sensor Networks. In: 2019 IEEE 89TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2019-SPRING): . Paper presented at 89th IEEE Vehicular Technology Conference (VTC Spring), APR 28-MAY 01, 2019, Kuala Lumpur, MALAYSIA. IEEE
Open this publication in new window or tab >>Reliable Communication Performance for Energy Harvesting Wireless Sensor Networks
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2019 (English)In: 2019 IEEE 89TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2019-SPRING), IEEE , 2019Conference paper, Published paper (Refereed)
Abstract [en]

In this paper, we study the problem of how to provide reliable communications for energy harvesting (EH) wireless sensor network (WSN). Using the example of an autonomous quarry, where self-driving trucks autonomously collect and transport goods, there is a need for multiple wireless sensors collecting data about where and when goods can be collected, while guaranteeing reliable operation of the quarry. The vehicles transfer energy to the wireless sensors within range, forming a cluster. The sensors use this energy to transmit data to the vehicles. Finally, the vehicles relay information to an access point (AP). The AP processes the collected information and synchronize the operation of all vehicles. We propose an interference channel selection policy for the sensors-to-vehicles links and vehicles-to-AP links to improve the reliability of the communications, while enhancing the energy utilization. Accordingly, closed-form expression on how to achieve reliable communication within the considered system is derived and numerical results show that the proposed channel selection strategy not only improves the probability of achieving sufficiently reliable communication but also enhances the energy utilization.

Place, publisher, year, edition, pages
IEEE, 2019
Series
IEEE Vehicular Technology Conference Proceedings, ISSN 1550-2252
Keywords
Energy Harvesting, Wireless Sensor Networks, Interference Level, Reliable Communication Probability
National Category
Communication Systems
Identifiers
urn:nbn:se:mdh:diva-45266 (URN)10.1109/VTCSpring.2019.8746317 (DOI)000482655600031 ()2-s2.0-85068972186 (Scopus ID)978-1-7281-1217-6 (ISBN)
Conference
89th IEEE Vehicular Technology Conference (VTC Spring), APR 28-MAY 01, 2019, Kuala Lumpur, MALAYSIA
Available from: 2019-09-19 Created: 2019-09-19 Last updated: 2020-02-20Bibliographically approved
Tran, H. V., Åkerberg, J., Björkman, M. & Tran, H.-V. (2019). RF energy harvesting: an analysis of wireless sensor networks for reliable communication. Wireless networks, 25(1), 185-199
Open this publication in new window or tab >>RF energy harvesting: an analysis of wireless sensor networks for reliable communication
2019 (English)In: Wireless networks, ISSN 1022-0038, E-ISSN 1572-8196, Vol. 25, no 1, p. 185-199Article in journal (Refereed) Published
Abstract [en]

In this paper, we consider a wireless energy harvesting network consisting of one hybrid access point (HAP) having multiple antennas, and multiple sensor nodes each equipped with a single antenna. In contrast to conventional uplink wireless networks, the sensor nodes in the considered network have no embedded energy supply. They need to recharge the energy from the wireless signals broadcasted by the HAP in order to communicate. Based on the point-to-point and multipoints-to-point model, we propose two medium access control protocols, namely harvesting at the header of timeslot (HHT) and harvesting at the dedicated timeslot (HDT), in which the sensor nodes harvest energy from the HAP in the downlink, and then transform its stored packet into bit streams to send to the HAP in the uplink. Considering a deadline for each packet, the cumulative distribution functions of packet transmission time of the proposed protocols are derived for the selection combining and maximal ratio combining (MRC) techniques at the HAP. Subsequently, analytical expressions for the packet timeout probability and system reliability are obtained to analyze the performance of proposed protocols. Analytical results are validated by numerical simulations. The impacts of the system parameters, such as energy harvesting efficiency coefficient, sensor positions, transmit signal-to-noise ratio, and the length of energy harvesting time on the packet timeout probability and the system reliability are extensively investigated. Our results show that the performance of the HDT protocol outperforms the one using the HHT protocol, and the HDT protocol with the MRC technique has the best performance and it can be a potential solution to enhance the reliability for wireless sensor networks.

Place, publisher, year, edition, pages
SPRINGER, 2019
Keywords
Energy harvesting, Wireless power transfer, Wireless sensor networks, Packet transmission time, Reliable communication
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:mdh:diva-42765 (URN)10.1007/s11276-017-1546-6 (DOI)000457945500014 ()2-s2.0-85025069932 (Scopus ID)
Projects
SafeCOP - Safe Cooperating Cyber-Physical Systems using Wireless Communication
Funder
EU, Horizon 2020, 692529 Vinnova
Available from: 2019-02-22 Created: 2019-02-22 Last updated: 2019-04-16Bibliographically approved
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