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923 Results Found

  • Review
  • Open Access
14 Citations
5,999 Views
33 Pages

Spectrum Sharing in the Sky and Space: A Survey

  • Ling Zhang,
  • Zhiqing Wei,
  • Lin Wang,
  • Xin Yuan,
  • Huici Wu and
  • Wenyan Xu

29 December 2022

In order to achieve the vision of seamless wireless communication coverage, a space–air–ground integrated network is proposed as a key component of the sixth-generation (6G) mobile communication system. However, the spectrum used by aeria...

  • Article
  • Open Access
2,408 Views
23 Pages

Towards Collaborative and Dynamic Spectrum Sharing via Interpretation of Spectrum Access Policies

  • Jakub Moskal,
  • Jae-Kark Choi,
  • Mieczyslaw M. Kokar,
  • Soobin Um and
  • Jeung Won Choi

30 July 2021

This paper describes some of the challenges that need to be addressed in order to develop collaborative spectrum-sharing systems. The importance of these challenges stems from the assumption that rules for spectrum sharing can change after the deploy...

  • Communication
  • Open Access
17 Citations
6,644 Views
15 Pages

Dynamic Spectrum Sharing for Future LTE-NR Networks

  • Gordana Barb,
  • Florin Alexa and
  • Marius Otesteanu

19 June 2021

5G is the next mobile generation, already being deployed in some countries. It is expected to revolutionize our society, having extremely high target requirements. The use of spectrum is, therefore, tremendously important, as it is a limited and expe...

  • Article
  • Open Access
5,130 Views
21 Pages

15 July 2017

Sharing of radio spectrum between different types of wireless systems (e.g., different service providers) is the foundation for making more efficient usage of spectrum. Cognitive radio technologies have spurred the design of spectrum servers that coo...

  • Article
  • Open Access
5 Citations
2,533 Views
19 Pages

11 September 2024

The anticipated surge of Internet of Things (IoT) devices is expected to intensify the demand for mid-band spectrum resources, posing challenges to traditional spectrum sharing methods. This paper addresses the limitations of static database-assisted...

  • Proceeding Paper
  • Open Access
2 Citations
2,567 Views
9 Pages

Spectrum Sharing Opportunities for 6G Terrestrial and Non-Terrestrial Networks

  • Valeria Petrini,
  • Manuel Faccioli and
  • Claudia Carciofi

This work analyzes the spectrum sharing scenarios of the evolution of terrestrial and non-terrestrial networks at a European and international level. The evolution and interoperability of terrestrial and non-terrestrial networks are key elements in p...

  • Article
  • Open Access
4 Citations
3,961 Views
13 Pages

A Spectrum Management Platform Architecture to Enable a Sharing Economy in 6G

  • Faycal Bouhafs,
  • Alessandro Raschellà,
  • Michael Mackay and
  • Frank den Hartog

28 October 2022

We propose a novel vision to trade and allocate wireless spectrum in 6G communication networks inspired by the concept of the sharing economy. We argue that such an approach will help ease the surge in demands for wireless spectrum that will characte...

  • Article
  • Open Access
5 Citations
5,039 Views
27 Pages

The CODYSUN Approach: A Novel Distributed Paradigm for Dynamic Spectrum Sharing in Satellite Communications

  • Irfan Jabandžić,
  • Fadhil Firyaguna,
  • Spilios Giannoulis,
  • Adnan Shahid,
  • Atri Mukhopadhyay,
  • Marco Ruffini and
  • Ingrid Moerman

2 December 2021

With a constant increase in the number of deployed satellites, it is expected that the current fixed spectrum allocation in satellite communications (SATCOM) will migrate towards more dynamic and flexible spectrum sharing rules. This migration is acc...

  • Article
  • Open Access
2 Citations
1,731 Views
23 Pages

10 September 2024

Unmanned aerial vehicles (UAVs) are promising tools in mobile communication due to their flexibility. However, the rapid development of mobile communications further intensifies the challenge of spectrum scarcity, necessitating spectrum sharing with...

  • Article
  • Open Access
4 Citations
1,618 Views
14 Pages

Dynamic Credible Spectrum Sharing Based on Smart Contract in Vehicular Networks

  • Qinchi Li,
  • Qin Wang,
  • Haitao Zhao,
  • Tianshui Chang,
  • Yuting Yang and
  • Sisi Xia

21 June 2024

With the rapid development of the Internet of Vehicles (IoV), the demand for wireless spectrum resources has significantly increased. Dynamic spectrum sharing technology is regarded as a key solution to alleviate the shortage of spectrum resources. H...

  • Article
  • Open Access
2 Citations
3,786 Views
21 Pages

29 March 2022

The coexistence of radar and communication systems is necessary to facilitate new wireless systems and services due to the shortage of the useful radio spectrum. Moreover, changes in spectrum regulation will be introduced in which the spectrum is all...

  • Article
  • Open Access
915 Views
21 Pages

13 April 2025

As the popularity of smartphones, wearable devices, intelligent vehicles, and countless other devices continues to rise, the surging demand for mobile data traffic has resulted in an increasingly crowded electromagnetic spectrum. Spectrum sharing ser...

  • Article
  • Open Access
1 Citations
3,271 Views
22 Pages

8 February 2020

In this paper, we present two spectrum sharing techniques for a multisystem, incorporating an integrated satellite-mobile system and an autonomous terrestrial-mobile system (iSMS/aTMS), namely orthogonal spectrum sharing (OSS) and non-orthogonal spec...

  • Letter
  • Open Access
5 Citations
3,277 Views
13 Pages

28 August 2020

In this paper, we propose a novel opportunistic interference alignment technique for spectrum-shared radar and uplink cellular communication systems where both systems are equipped with multiple antennas. In the proposed OIA technique, the radar syst...

  • Article
  • Open Access
1,196 Views
28 Pages

Spectrum Sharing Design for Integrated Aeronautical Communication and Radar System

  • Lanchenhui Yu,
  • Jingjing Zhao,
  • Quan Zhou,
  • Yanbo Zhu and
  • Kaiquan Cai

28 March 2025

The novel framework of an integrated aeronautical communication and radar system (IACRS) to realize spectrum sharing is investigated. A non-orthogonal multiple access (NOMA)-motivated multi-input–multi-output (MIMO) scheme is proposed for the d...

  • Feature Paper
  • Article
  • Open Access
3 Citations
2,620 Views
16 Pages

25 June 2021

Massive MIMO is a key 5G technology that achieves high spectral efficiency and capacity by significantly increasing the number of antennas per cell. Furthermore, due to precoding, massive MIMO allows co-channel interference cancellation across cells....

  • Article
  • Open Access
4 Citations
3,806 Views
16 Pages

1 December 2019

This paper presents a cognitive satellite communication based wireless sensor network, which combines the wireless sensor network and the cognitive satellite terrestrial network. To address the conflict between the continuously increasing demand and...

  • Article
  • Open Access
3,467 Views
17 Pages

6 November 2018

This paper proposes a reciprocal-selection-based ‘Win–Win’ overlay spectrum-sharing scheme for device-to-Device-enabled cellular networks to address the resource sharing between Device-to-Device devices and the cellular users by usi...

  • Article
  • Open Access
18 Citations
4,048 Views
15 Pages

12 November 2018

With the growing demand, Wireless Multimedia Sensor Networks (WMSNs) play an increasingly important role, which enhances the capacity of typical Wireless Sensor Networks (WSNs). Additionally, integrating satellite systems into WMSNs brings about the...

  • Article
  • Open Access
6 Citations
3,239 Views
20 Pages

Interference Cancellation Based Spectrum Sharing for Massive MIMO Communication Systems

  • Milembolo Miantezila Junior,
  • Bin Guo,
  • Chenjie Zhang and
  • Xuemei Bai

21 May 2021

Cellular network operators are predicting an increase in space of more than 200 percent to carry the move and tremendous increase of total users in data traffic. The growing of investments in infrastructure such as a large number of small cells, part...

  • Article
  • Open Access
1 Citations
2,503 Views
15 Pages

29 November 2022

In this paper, cognitive technology is introduced into the integrated satellite terrestrial system to realize the dynamic spectrum sharing of the system and improve the utilization rate of spectrum resources. To overcome the effects of low signal-to-...

  • Article
  • Open Access
4 Citations
2,230 Views
20 Pages

10 December 2022

In cognitive radio networks (CRNs), the performance of the primary users (PUs) may suffer adverse effects from the secondary users (SUs) if the spectrum of PUs is haphazardly shared with SUs. In this paper, we propose a hybrid cognitive cooperative p...

  • Article
  • Open Access
2 Citations
3,027 Views
12 Pages

13 June 2019

In this paper, we propose subcarrier allocation based cooperative spectrum sharing protocol for OFDM relaying networks with wireless energy harvesting. In the proposed protocol, the cognitive relay node utilizes different subcarriers to forward the p...

  • Article
  • Open Access
12 Citations
4,926 Views
18 Pages

27 November 2017

In Wireless Sensor Networks (WSNs), unlicensed users, that is, sensor nodes, have excessively exploited the unlicensed radio spectrum. Through Cognitive Radio (CR), licensed radio spectra, which are owned by licensed users, can be partly or entirely...

  • Article
  • Open Access
6 Citations
4,470 Views
20 Pages

Heterogeneous Multi-Agent Deep Reinforcement Learning for Cluster-Based Spectrum Sharing in UAV Swarms

  • Xiaomin Liao,
  • Yulai Wang,
  • Yang Han,
  • You Li,
  • Chushan Lin and
  • Xuan Zhu

17 May 2025

Unmanned aerial vehicle (UAV) swarms are widely applied in various fields, including military and civilian domains. However, due to the scarcity of spectrum resources, UAV swarm clustering technology has emerged as an effective method for achieving s...

  • Article
  • Open Access
10 Citations
3,386 Views
13 Pages

In recent years, the ultra-dense low Earth orbit (LEO) satellite communication (UD-LSC) networks such as SpaceX and OneWeb are under rapid development to provide worldwide and broadband services. However, the deployment of thousands of LEO satellites...

  • Feature Paper
  • Article
  • Open Access
8 Citations
3,015 Views
22 Pages

10 October 2019

In this paper, we propose a technique to share the licensed spectrums of all mobile network operators (MNOs) of a country with in-building small cells per MNO by exploiting the external wall penetration loss of a building and introducing the time-dom...

  • Article
  • Open Access
11 Citations
2,100 Views
17 Pages

14 June 2023

The integration of non-orthogonal multiple access (NOMA) technology and cognitive radio networks (CRNs) promises to enhance the spectrum utilization efficiency of 5G and beyond-5G (B5G) mobile communication systems. In this article, a NOMA-based spec...

  • Article
  • Open Access
19 Citations
4,502 Views
28 Pages

22 July 2019

In this paper, we show how to realize numerous spectrum licensing policies by means of time-domain enhanced inter-cell interference coordination (eICIC) technique to share both the licensed and unlicensed spectrums with small cells in order to addres...

  • Article
  • Open Access
5 Citations
1,851 Views
26 Pages

A Multi-Objective Genetic Algorithm–Deep Reinforcement Learning Framework for Spectrum Sharing in 6G Cognitive Radio Networks

  • Ancilla Wadzanai Chigaba,
  • Sindiso Mpenyu Nleya,
  • Mthulisi Velempini and
  • Samkeliso Suku Dube

5 September 2025

The exponential growth in wireless communication demands intelligent and adaptive spectrum-sharing solutions, especially within dynamic and densely populated 6G Cognitive Radio Networks (CRNs). This paper introduces a novel hybrid framework combing t...

  • Article
  • Open Access
8 Citations
2,551 Views
22 Pages

1 August 2022

To efficiently utilize nonexclusive underwater acoustic frequencies, we propose an Underwater Cooperative Spectrum Sharing (UCSS) protocol for a centralized underwater cognitive acoustic network that mainly consists of two parts. In the first part, t...

  • Article
  • Open Access
8 Citations
2,853 Views
11 Pages

30 March 2020

With the growth of the number of Internet of Things (IoT) devices, a wide range of wireless sensor networks (WSNs) will be deployed for various applications. In general, WSNs are constrained by limitations in spectrum and energy resources. In order t...

  • Article
  • Open Access
20 Citations
3,852 Views
20 Pages

Deep Q-Learning-Based Transmission Power Control of a High Altitude Platform Station with Spectrum Sharing

  • Seongjun Jo,
  • Wooyeol Yang,
  • Haing Kun Choi,
  • Eonsu Noh,
  • Han-Shin Jo and
  • Jaedon Park

19 February 2022

A High Altitude Platform Station (HAPS) can facilitate high-speed data communication over wide areas using high-power line-of-sight communication; however, it can significantly interfere with existing systems. Given spectrum sharing with existing sys...

  • Review
  • Open Access
15 Citations
8,833 Views
17 Pages

A smart city is an environment where a pervasive, multi-service network is employed to provide citizens improved living conditions as well as better public safety and security. Advanced communication technologies are essential to achieve this goal. I...

  • Article
  • Open Access
219 Views
20 Pages

12 February 2026

With the rapid development of the Internet of Vehicles (IoV), the explosive growth of data traffic within the system has led to a surge in demand for spectrum resources. However, the strict limitations on spectrum supply make the construction of an e...

  • Article
  • Open Access
16 Citations
7,646 Views
18 Pages

Performance Modeling Framework for IoT-over-Satellite Using Shared Radio Spectrum

  • Chiu Chun Chan,
  • Akram Al-Hourani,
  • Jinho Choi,
  • Karina Mabell Gomez and
  • Sithamparanathan Kandeepan

22 May 2020

Delivering Internet-of-Things (IoT) connectivity over satellite is a promising solution for applications in remote and sparsely populated areas. These applications range from smart agriculture, logistics, asset tracking to emergency services. Using a...

  • Article
  • Open Access
11 Citations
4,756 Views
13 Pages

28 August 2021

To meet the increasing demands for remote sensing, a number of radar systems using Linear Frequency Modulation (LFM) waveforms have been deployed, causing the problem of depleting frequency resources. To address this problem, several researchers have...

  • Article
  • Open Access
14 Citations
2,461 Views
20 Pages

6 November 2021

In this paper, we consider a novel cooperative underlay cognitive radio network based on non-orthogonal multiple access (CR-NOMA) with adaptive relay selection and power allocation. In secondary networks, dedicated relay assistance and user assistanc...

  • Article
  • Open Access
1,605 Views
17 Pages

18 September 2024

The electromagnetic spectrum is a limited resource. With the widespread application of the electromagnetic spectrum in various fields, the contradiction between the demand for the electromagnetic spectrum and electromagnetic spectrum resources has be...

  • Article
  • Open Access
2,621 Views
13 Pages

Anti-Wiretap Spectrum-Sharing for Cooperative Cognitive Radio Communication Systems

  • Peiyuan Si,
  • Weidang Lu,
  • Kecai Gu,
  • Xin Liu,
  • Bo Li,
  • Hong Peng and
  • Yi Gong

24 September 2019

As wireless communication technology keeps progressing, people’s requirements for wireless communication quality are getting higher and higher. Wireless communication brings convenience, but also causes some problems. On the one hand, the tradi...

  • Article
  • Open Access
11 Citations
5,936 Views
27 Pages

Spectrum Sharing Based on a Bertrand Game in Cognitive Radio Sensor Networks

  • Biqing Zeng,
  • Chi Zhang,
  • Pianpian Hu and
  • Shengyu Wang

7 January 2017

In the study of power control and allocation based on pricing, the utility of secondary users is usually studied from the perspective of the signal to noise ratio. The study of secondary user utility from the perspective of communication demand can n...

  • Article
  • Open Access
1,906 Views
16 Pages

Achievable Rate of NOMA-Based Cooperative Spectrum-Sharing CRN over Nakagami-m Channels

  • Sajid Hussain Alvi,
  • Bakhtiar Ali,
  • Jawad Mirza,
  • Ali Khaqan,
  • Muhammad Awais Javed,
  • Jehad Ali and
  • Niamat Hussain

24 November 2022

Efficient data dissemination is a key challenge for IoT applications. In this paper, we present an ergodic achievable rate analysis of the non-orthogonal multiple access (NOMA)-based cooperative transmission scheme in spectrum-sharing cognitive radio...

  • Article
  • Open Access
14 Citations
3,716 Views
15 Pages

A Hybrid Multi-Agent Reinforcement Learning Approach for Spectrum Sharing in Vehicular Networks

  • Mansoor Jamal,
  • Zaib Ullah,
  • Muddasar Naeem,
  • Musarat Abbas and
  • Antonio Coronato

28 April 2024

Efficient spectrum sharing is essential for maximizing data communication performance in Vehicular Networks (VNs). In this article, we propose a novel hybrid framework that leverages Multi-Agent Reinforcement Learning (MARL), thereby combining both c...

  • Article
  • Open Access
20 Citations
5,714 Views
16 Pages

Dynamic Spectrum Sharing Based on Deep Reinforcement Learning in Mobile Communication Systems

  • Sizhuang Liu,
  • Changyong Pan,
  • Chao Zhang,
  • Fang Yang and
  • Jian Song

27 February 2023

The rapid development of mobile communication services in recent years has resulted in a scarcity of spectrum resources. This paper addresses the problem of multi-dimensional resource allocation in cognitive radio systems. Deep reinforcement learning...

  • Article
  • Open Access
17 Citations
3,290 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...

  • Review
  • Open Access
7 Citations
9,015 Views
26 Pages

Misbehavior Scenarios in Cognitive Radio Networks

  • Stamatios Arkoulis,
  • Giannis F. Marias,
  • Pantelis A. Frangoudis,
  • Jens Oberender,
  • Alexandru Popescu,
  • Markus Fiedler,
  • Hermann de Meer and
  • George C. Polyzos

29 July 2010

Recent advances in the fields of Cognitive Radio and the proliferation of open spectrum access promise that spectrum-agile wireless communication will be widespread in the near future, and will bring significant flexibility and potential utility impr...

  • Article
  • Open Access
6 Citations
3,961 Views
15 Pages

This paper investigates the impact of cooperative spectrum sharing policy on the performance of hybrid radio frequency and free space optical wireless communication networks, where primary users and secondary users develop a band of the same spectrum...

  • Article
  • Open Access
1 Citations
5,134 Views
10 Pages

12 October 2025

Background/Objectives: Lipedema is a chronic, progressive disorder of the adipo-fascial tissue characterized by abnormal subcutaneous fat accumulation, inflammation, fibrosis, pain, and edema. Despite its considerable impact on patients’ qualit...

  • Article
  • Open Access
15 Citations
4,952 Views
23 Pages

Fifth generation (5G) mobile networks can accomplish enhanced communication capabilities and desired to connect things in addition to people. By means of optimally splitting the spectrum to integrate more efficient segments, mobile operators can deli...

  • Article
  • Open Access
2 Citations
2,968 Views
18 Pages

24 June 2020

This paper proposes a blockchain-based automated frequency coordination system (BAFCS) for secure and reliable spectrum sharing without causing any harmful interference to an existing system. For the exact assessment of whether the incumbent is inter...

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