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1,118 Results Found

  • Article
  • Open Access
22 Citations
2,595 Views
10 Pages

Relay Synchronization in a Weighted Triplex Network

  • Md Sayeed Anwar,
  • Dibakar Ghosh and
  • Nikita Frolov

2 September 2021

Relay synchronization in multi-layer networks implies inter-layer synchronization between two indirectly connected layers through a relay layer. In this work, we study the relay synchronization in a three-layer multiplex network by introducing degree...

  • Article
  • Open Access
4 Citations
2,419 Views
19 Pages

11 February 2022

Unmanned aerial vehicles (UAVs), in particular multirotors, are becoming the de facto tool for aerial sensing and remote inspection. In large industrial facilities, a UAV can transmit an online video stream to inspect difficult-to-access structures,...

  • Article
  • Open Access
6 Citations
4,318 Views
12 Pages

15 February 2019

In this paper, we propose a joint power allocation, time switching (TS) factor and relay selection scheme for an energy harvesting two-way relaying communication network (TWRN), where two transceivers exchange information with the help of a wireless-...

  • Article
  • Open Access
11 Citations
2,382 Views
7 Pages

Experimental Demonstration of Secure Relay in Quantum Secure Direct Communication Network

  • Min Wang,
  • Wei Zhang,
  • Jianxing Guo,
  • Xiaotian Song and
  • Guilu Long

16 November 2023

Quantum secure direct communication (QSDC) offers a practical way to realize a quantum network which can transmit information securely and reliably. Practical quantum networks are hindered by the unavailability of quantum relays. To overcome this lim...

  • Article
  • Open Access
7 Citations
2,088 Views
20 Pages

8 November 2022

In this paper, we propose a two-way relaying scheme using digital network coding in an underlay cognitive radio network. In the proposed scheme, the transmit antenna selection and selection techniques are combined using a primary transmitter and a pr...

  • Article
  • Open Access
2 Citations
1,223 Views
21 Pages

25 September 2024

This paper tackles the challenge of secure and reliable data transmission in diamond network configurations featuring two untrusted relays with low-security clearance. We propose an innovative approach that employs lossy-decode and -forward relaying...

  • Article
  • Open Access
3,776 Views
20 Pages

3 December 2019

This paper presents a relay selection algorithm based on fair battery power utilization for extending mobile network coverage and capacity by using a cooperative communication strategy where mobile devices can be utilized as relays. Cooperation impro...

  • Article
  • Open Access
2 Citations
2,984 Views
18 Pages

24 July 2018

Consider a network consisting of two independent single-antenna sources, a single-antenna destination and a helping multiple-antenna relay. This network is called a dual-hop multiple access relay network (MARN). In this network, sources transmit to t...

  • Communication
  • Open Access
2 Citations
2,436 Views
14 Pages

23 June 2021

In this paper, we investigated the performance of a two-way satellite-terrestrial DF relay network with asymmetric simultaneous wireless information and power transfer (SWIPT). In particular, selective physical-layer network coding (SPNC) was employe...

  • Article
  • Open Access
42 Citations
5,693 Views
23 Pages

Towards Efficient Wireless Body Area Network Using Two-Way Relay Cooperation

  • Maham Waheed,
  • Rizwan Ahmad,
  • Waqas Ahmed,
  • Micheal Drieberg and
  • Muhammad Mahtab Alam

13 February 2018

The fabrication of lightweight, ultra-thin, low power and intelligent body-borne sensors leads to novel advances in wireless body area networks (WBANs). Depending on the placement of the nodes, it is characterized as in/on body WBAN; thus, the channe...

  • Article
  • Open Access
15 Citations
4,296 Views
22 Pages

Throughput Analysis on 3-Dimensional Underwater Acoustic Network with One-Hop Mobile Relay

  • Xuefeng Zhong,
  • Fangjiong Chen,
  • Jiasheng Fan,
  • Quansheng Guan,
  • Fei Ji and
  • Hua Yu

16 January 2018

Underwater acoustic communication network (UACN) has been considered as an essential infrastructure for ocean exploitation. Performance analysis of UACN is important in underwater acoustic network deployment and management. In this paper, we analyze...

  • Article
  • Open Access
14 Citations
3,630 Views
20 Pages

12 March 2020

The relay reliability has an impact on the reliability of the entire electric vehicle system. This paper contributes to propose the improving fireworks algorithm optimizing the grey neural network model to predict the relay lifetime. This paper shows...

  • Article
  • Open Access
1 Citations
1,030 Views
18 Pages

10 February 2025

In relay-assisted underwater wireless optical communication (UWOC) systems, the traditional time-division-multiplexed relay forwarding strategy faces high latency and low throughput with the increase of relay users. To address these issues, this pape...

  • Article
  • Open Access
676 Views
15 Pages

14 March 2025

Full-duplex relay networks have been studied to enhance network performance under the assumption that the number and positions of relay nodes are fixed. To account for the practical randomness in the number and locations of relays, this paper investi...

  • Article
  • Open Access
2 Citations
1,166 Views
14 Pages

18 November 2024

Full-duplex relay (FDR) has attracted considerable interest in enhancing the performance of relay networks by utilizing resources more efficiently. In this paper, we propose a framework for full-duplex random relay networks (FDRRNs), where relay node...

  • Article
  • Open Access
1 Citations
2,238 Views
16 Pages

3 October 2021

In long distance sensor nodes, propagation delay is the most crucial factor for the successful transmission of data packets in underwater acoustic sensors networks (UWAs). Therefore, to cope with the problem of propagation delay, we propose examining...

  • Article
  • Open Access
5 Citations
2,609 Views
19 Pages

Improved Deep Neural Network (IDNN) with SMO Algorithm for Enhancement of Third Zone Distance Relay under Power Swing Condition

  • Cholleti Sriram,
  • Jarupula Somlal,
  • B. Srikanth Goud,
  • Mohit Bajaj,
  • Mohamed F. Elnaggar and
  • Salah Kamel

6 June 2022

A zone 3 distance relay is utilized to provide remote backup protection in the event that the primary protection fails. However, under stressful situations such as severe loads, voltage, and transient instability, the danger of malfunction in distanc...

  • Article
  • Open Access
12 Citations
1,839 Views
22 Pages

19 November 2022

Due to the shortcomings of the standard bat algorithm (BA) for multi-parameter optimization, an improved bat algorithm is proposed. The benchmark function test shows that the proposed algorithm has better realization of high-dimensional function opti...

  • Article
  • Open Access
5 Citations
3,355 Views
14 Pages

3 June 2019

In this paper, we introduce a half-duplex (HD) energy harvesting (EH) relay network over the different fading environment with the effect of hardware impairment (HI). The model system was investigated with the amplify-and-forward (AF) and the power s...

  • Communication
  • Open Access
3 Citations
3,153 Views
22 Pages

Microwave line-of-sight radio relay (RR) systems are a constitutive part of a telecom operator transport network, as an alternative to optical transmission systems when the latter are not technically possible or rational to implement. Nowadays, RR li...

  • Review
  • Open Access
11 Citations
4,244 Views
17 Pages

The relay selection is a promising approach of maximizing the diversity gain achieved in the cooperative wireless sensor networks. In the cooperative networks, the proper selection of relay node is a challenging task. The proper selection of relay no...

  • Article
  • Open Access
2 Citations
1,803 Views
14 Pages

In this paper, we investigate the trust-degree-based secure relay selection in simultaneous wireless information and power transfer (SWIPT)-enabled relay networks. In particular, we optimize the interference power by selecting the appropriate relay a...

  • Article
  • Open Access
4 Citations
3,004 Views
19 Pages

22 September 2020

Due to the global coverage and real-time access advantages of the Tracking and Data Relay Satellite System (TDRSS), the demonstration platform based on TDRSS can satisfy the new technology verification and demonstration needs of the space information...

  • Article
  • Open Access
18 Citations
4,665 Views
14 Pages

Machine Learning-Based Relay Selection for Secure Transmission in Multi-Hop DF Relay Networks

  • Tien-Tung Nguyen,
  • Jong-Ho Lee,
  • Minh-Tuan Nguyen and
  • Yong-Hwa Kim

A relay selection method is proposed for physical-layer security in multi-hop decode-and-forward (DF) relaying systems. In the proposed method, cooperative relays are selected to maximize the achievable secrecy rates under DF-relaying constraints by...

  • Feature Paper
  • Article
  • Open Access
4 Citations
3,792 Views
13 Pages

A Time Synchronization Protocol for Barrage Relay Networks

  • Woong Son,
  • Jungwook Choi,
  • Soobum Park,
  • Howon Lee and
  • Bang Chul Jung

22 February 2023

Time-division multiple access (TDMA)-based medium access control (MAC) protocol has been widely used for avoiding access conflicts in wireless multi-hop ad hoc networks, where the time synchronization among wireless nodes is essential. In this paper,...

  • Article
  • Open Access
1 Citations
3,040 Views
13 Pages

19 September 2019

The fast increase of users in existing mobile networks requires more base stations (BSs) to bear more communication traffic. Future heterogeneous network is considered to be a promising candidate architecture to meet the demands of wireless networks...

  • Article
  • Open Access
1,546 Views
24 Pages

A Novel Compute-and-Forward Relaying Method for Multi-Antenna Wireless Relay Networks

  • Xuan Yang,
  • Jiaqi Yan,
  • Yonggang Xu,
  • Desheng Wang and
  • Gang Hua

3 November 2023

Compute-and-Forward (CoF) is an innovative physical layer network coding strategy, designed to enable receivers in wireless communications to effectively utilize interference. The key idea of CoF is to implement integer combinations based on the code...

  • Article
  • Open Access
2 Citations
1,244 Views
21 Pages

A Secure Cooperative Transmission of Image Super-Resolution in Wireless Relay Networks

  • Hien-Thuan Duong,
  • Ca V. Phan,
  • Quoc-Tuan Vien and
  • Tuan T. Nguyen

6 September 2023

The image transmission over wireless media experiences not only unavailable performance loss caused by the environment and hardware issues, but also information leakage to eavesdroppers who can overhear and attempt to recover the images. This paper p...

  • Article
  • Open Access
11 Citations
2,496 Views
16 Pages

25 July 2022

Integrated satellite multiple terrestrial relay network (ISMTRN) is a new network architecture that combines satellite communication with terrestrial communication. It both utilizes the advantages of the two systems and overcomes their shortcomings....

  • Article
  • Open Access
12 Citations
2,556 Views
16 Pages

28 December 2022

In this paper, a dual-hop underlay cognitive relay network (CRN) with a best-relay selection (BRS) scheme under spectrum-sharing constraints from the primary user (PU) is investigated. The system model in this work consists of one PU, one secondary u...

  • Article
  • Open Access
15 Citations
3,291 Views
18 Pages

15 May 2018

In this paper, we investigate the performance of a two-way hybrid satellite multi-terrestrial cooperative network with hardware impairments (HIs). Particularly, opportunistic relay selection scheme is employed in the considered network, which can sub...

  • Article
  • Open Access
16 Citations
3,855 Views
25 Pages

An Optimized Relay Selection Technique to Improve the Communication Reliability in Wireless Sensor Networks

  • Suelen Laurindo,
  • Ricardo Moraes,
  • Ríad Nassiffe,
  • Carlos Montez and
  • Francisco Vasques

28 September 2018

Wireless Sensor Networks (WSN) are enabler technologies for the implementation of the Internet of Things (IoT) concept. WSNs provide an adequate infrastructure for the last-link communication with smart objects. Nevertheless, the wireless communicati...

  • Article
  • Open Access
4 Citations
2,973 Views
18 Pages

20 May 2019

This paper considers a simultaneous wireless information and power transfer (SWIPT) based decode-and-forward (DF) relaying sensor network, where the “save-and-forward” strategy is utilized at the relay sensor node. We investigate a joint...

  • Feature Paper
  • Article
  • Open Access
2 Citations
2,705 Views
17 Pages

In this paper, we investigate the performance of a detector recently proposed by us that is applied in the relay station receiving signals from two terminals concurrently exchanging data in the two-way relaying system. This is one of the potential co...

  • Feature Paper
  • Article
  • Open Access
744 Views
20 Pages

1 August 2025

This study presents a semi-random mobility model called Semi-Random Elliptical Movement (SREM), developed for relay-oriented Flying Ad Hoc Networks (FANETs). In FANETs, node distribution has a major impact on network performance, making the mobility...

  • Article
  • Open Access
36 Citations
6,257 Views
11 Pages

UAV Based Relay for Wireless Sensor Networks in 5G Systems

  • Shu Fu,
  • Lian Zhao,
  • Zhou Su and
  • Xin Jian

25 July 2018

Relay is one of the most significant issues in smart industrial wireless sensor networks (WSN) due to the low transmitting power of sensors. By relay, the signals of sensors can be concentrated at the relay and further transmitted to the base station...

  • Article
  • Open Access
12 Citations
3,584 Views
13 Pages

10 May 2020

Magneto-inductive (MI) waveguide technology is often proposed to increase the MI communication distance without adding significant cost and power consumption to the wireless sensor network. The idea is to add intermediate relaying nodes between trans...

  • Article
  • Open Access
17 Citations
5,014 Views
21 Pages

Securing Relay Networks with Artificial Noise: An Error Performance-Based Approach

  • Ying Liu,
  • Liang Li,
  • George C. Alexandropoulos and
  • Marius Pesavento

26 July 2017

We apply the concept of artificial and controlled interference in a two-hop relay network with an untrusted relay, aiming at enhancing the wireless communication secrecy between the source and the destination node. In order to shield the square quadr...

  • Article
  • Open Access
16 Citations
3,976 Views
19 Pages

Optimal Relay Selection Scheme with Multiantenna Power Beacon for Wireless-Powered Cooperation Communication Networks

  • Oussama Messadi,
  • Aduwati Sali,
  • Vahid Khodamoradi,
  • Asem A. Salah,
  • Gaofeng Pan,
  • Shaiful J. Hashim and
  • Nor K. Noordin

29 December 2020

Unlike the fixed power grid cooperative networks, which are mainly based on the reception reliability parameter while choosing the best relay, the wireless-powered cooperative communication network (WPCCN) and in addition to the reception reliability...

  • Article
  • Open Access
22 Citations
4,319 Views
27 Pages

Reinforcement Learning Based Relay Selection for Underwater Acoustic Cooperative Networks

  • Yuzhi Zhang,
  • Yue Su,
  • Xiaohong Shen,
  • Anyi Wang,
  • Bin Wang,
  • Yang Liu and
  • Weigang Bai

15 March 2022

In the complex and dynamically varying underwater acoustic (UWA) channel, cooperative communication can improve throughput for UWA sensor networks. In this paper, we design a reasonable relay selection strategy for efficient cooperation with reinforc...

  • Article
  • Open Access
8 Citations
5,087 Views
17 Pages

3 July 2017

This paper obtains optimal power allocation to the data aggregator units (DAUs) and relays for cognitive wireless networks in a smart grid (SG). Firstly, the mutual interference between the primary user and the DAU are considered, and the expressions...

  • Article
  • Open Access
1 Citations
2,518 Views
18 Pages

27 September 2022

Distributed fountain coding plays an important role in rateless code research. The reliability and effectiveness of these coding schemes are increasingly challenged with the growing applications. In this paper, a novel multiple-access network with co...

  • Article
  • Open Access
19 Citations
4,602 Views
21 Pages

28 March 2017

Wireless sensor networks (WSNs) will play a fundamental role in the realization of Internet of Things and Industry 4.0. Arising from the presence of spatially distributed sensor nodes in a sensor network, cooperative diversity can be achieved by usin...

  • Article
  • Open Access
6 Citations
5,734 Views
20 Pages

18 January 2016

Pocket switched networks (PSNs) take advantage of human mobility to deliver data. Investigations on real-world trace data indicate that human mobility shows an obvious spatial regularity: a human being usually visits a few places at high frequencies....

  • Article
  • Open Access
2 Citations
685 Views
11 Pages

A Fuzzy-Based Relay Security Algorithm for Wireless Sensor Networks

  • Nan-I Wu,
  • Tung-Huang Feng and
  • Min-Shiang Hwang

16 July 2025

Wireless sensor network data is an important source of big data. A sensor node cooperatively transmits or forwards data through intermediate nodes to a collection center, which is then aggregated for big data analysis and application. The relay selec...

  • Article
  • Open Access
2 Citations
5,441 Views
20 Pages

29 June 2015

Wireless sensor networks have been considered as an enabling technology for constructing smart cities. One important feature of wireless sensor networks is that the sensor nodes collaborate in some manner for communications. In this manuscript, we fo...

  • Article
  • Open Access
17 Citations
3,201 Views
16 Pages

19 November 2019

In this paper, we investigate the auction-based secondary relay selection on overlay spectrum sharing in hybrid satellite–terrestrial sensor networks (HSTSNs), where both the decode-and-forward (DF) and amplify-and-forward (AF) relay protocols are an...

  • Article
  • Open Access
10 Citations
6,188 Views
28 Pages

Exploiting Outage and Error Probability of Cooperative Incremental Relaying in Underwater Wireless Sensor Networks

  • Hina Nasir,
  • Nadeem Javaid,
  • Muhammad Sher,
  • Umar Qasim,
  • Zahoor Ali Khan,
  • Nabil Alrajeh and
  • Iftikhar Azim Niaz

12 July 2016

This paper embeds a bi-fold contribution for Underwater Wireless Sensor Networks (UWSNs); performance analysis of incremental relaying in terms of outage and error probability, and based on the analysis proposition of two new cooperative routing prot...

  • Article
  • Open Access
4 Citations
3,331 Views
13 Pages

Energy-Efficient Subcarrier Pairing and Power Allocation for DF Relay Networks with an Eavesdropper

  • Keshav Singh,
  • Meng-Lin Ku,
  • Sudip Biswas and
  • Tharmalingam Ratnarajah

24 November 2017

Algorithms for joint subcarrier pairing and power allocation are investigated in order to maximize the worst-case energy efficiency (EE) in dual-hop decode-and-forward (DF) relay networks in the presence of an active eavesdropper. Accordingly, we stu...

  • Article
  • Open Access
6 Citations
3,228 Views
26 Pages

3 December 2018

Employment of a relay node can extend the coverage of a message in vehicular networks (VNET). In addition, the prior information regarding the road structure, which determines the structure of VNET, can benefit relay-node selection. However, the non-...

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