Satellite Internet of Things (IoT) requires the use of satellites as the access points for IoT devices for achieving global coverage of future IoT systems. It is expected to support burgeoning IoT applications, including communication, sensing, and computing. However, the complex and dynamic satellite environments and limited network resources raise new challenges in the design of satellite IoT systems

Satellite-terrestrial integrated communication constitutes an appealing paradigm for future wireless communication, and has been deemed inevitable in order to achieve seamless global coverage. It is foreseeable that satellite-terrestrial integrated communication will realize information transmission in a more complex space-time environment. Affected by fading, noise, and interference, the signal will

Radiative wireless power transfer plays a vital role in addressing the challenges facing today's Internet of Things. Challenges include frequent battery replacement, excessive electronic waste, and autonomous operation in hard-to-reach places. Concurrent charging is a fundamental pattern in radiative wireless power transfer where multiple chargers transmit energy waves concurrently, or the signals

Flying ad-hoc networks (FANETs) enable an unmanned aerial vehicle (UAV) to work as both the task operator and the relay node, providing adaptive communication coverage for remote areas. However, the FANET's open communication lines pose significant security risks. In particular, when the eavesdropper detects communication activities between FANET and ground base stations, there is a possibility of

The flexible-position multiple-input multiple-output (FLP-MIMO) -- used in, for example, fluid antennas and movable antennas -- is a promising technology for future wireless communications. This is due to the fact that the positions of antennas at the transceiver and reflector can be dynamically optimized using FLP-MIMO to achieve better channel conditions and, as such, can provide high spectral efficiency

Ultra-dense low Earth orbit (LEO) satellite communications have been regarded as an important solution for 6G to provide seamless and high-throughput network services. However, the qualified data transmissions among satellites are challenged by the routing policy design which is significantly difficult due to the ultra density, high dynamics, complex inter-satellite links (ISLs), and diversified quality

Multiple-input-multiple-output (MIMO) has proved to be a success for the fourth generation (4G) long term evolution (LTE) and is one of the key technical enablers for evolved mobile broadband (eMBB) in the fifth generation (5G) wireless communications. However, along with the number of antennas eventually increasing greatly and onehop communication distance gradually reducing, significantly increasing

Cell-free massive multiple-input multiple-output (mMIMO) and extremely large-scale MIMO (XL-MIMO) are regarded as promising innovations for the forthcoming generation of wireless communication systems. Their significant advantages in augmenting the number of degrees of freedom have garnered considerable interest. In this article, we first review the essential opportunities and challenges induced by

Physical layer key generation (PLKG) is a promising technology to obtain symmetric keys between a pair of wireless communication users in a plug-and-play manner. The shared entropy source almost entirely comes from the intrinsic randomness of the radio channel, which is highly dependent on the wireless environments. However, in some static/block fading wireless environments, it is hard to guarantee

Sixth-generation (6G) network slicing is the backbone of future communications systems. It inaugurates the era of extreme ultra-reliable and low-latency communication (xURLLC), and pervades the digitalization of the various vertical immersive use cases. Since 6G inherently underpins artificial intelligence (AI), we propose a systematic and standalone slice termed SliceOps that is natively embedded

Image transmission over wireless communications can be used in a variety of applications, such as smart city, surveillance systems, and Metaverse construction. Massive image transmission can indeed be a burden for wireless communication networks, especially in situations where a large number of users are trying to transmit high-resolution images simultaneously. An efficient image transmission framework

Because wireless communication network attacks continue to evolve, cyber security is becoming more and more important, requiring network security solutions to be constantly updated. In addition, wireless communication network traffic in high-speed networks is massive, high-dimensional, dynamic, and so on, making attacks difficult to detect in real-time. Unknown attacks are also difficult to identify

The soaring number of connected vehicles poses a challenge for processing the vast amount of onboard data. Local processing is hindered by scarce onboard resources, and cloud uploading is undesirable due to high latency. To address the last-mile network connection issue, vehicular fog computing (VFC) has been proposed, where roadside infrastructures and specific vehicles installed with computing and

Like robust connectivity, precise positioning is evolving into an innovative component of 5G service offerings for industrial use-cases and verticals with challenging indoor radio environments. Therefore, the 3GPP Rel-16 standard has been a tipping point in specifying critical innovations, followed by enhancements in Rel-17 and Rel-18. In this article, we discuss the 5G positioning framework, measurements

With rapid development of Internet of Things (IoT), the number of deployed IoT devices increases dramatically to meet the requirements of various applications, such as smart homes, smart cities, and environmental monitoring. WiFi, ZigBee, and LoRa are well-known wireless technologies used to connect IoT devices. The trend of rapid growth shows that these devices will coexist in large quantities in

As study of reconfigurable intelligent surface (RIS) moves from theoretical analysis to practical engineering, field trials become more important to understand how RIS performs in the real world. So far comprehensive field trials have been scanty, particularly in commercial networks. In this article, we carry out a field trial of RIS-aided 5G networks where the element phases of RIS are optimized with

The Terahertz (THz) band with abundant multiten-GHz bandwidth is capable of supporting terabit-per-second wireless communications, which is a pillar technology for 6G and beyond systems. With sub-millimeter-long antennas, ultra-massive (UM)-MIMO and reflective intelligent surface (RIS) systems with thousands of array elements can be exploited to effectively combat the distance limitation and blockage

Artificial intelligence-generated content (AIGC) refers to the use of AI to automate the information creation process while fulfilling the personalized requirements of users. However, due to the instability of AIGC models - for example, the stochastic nature of diffusion models - the quality and accuracy of the generated content can vary significantly. In wireless edge networks, the transmission of

Summary form only. Provides an overview and summary of the technical articles and features of interest to readers that appear in select Communications Society publications.

Terahertz (THz) band has attracted increasingly attention from the academic and industry for communications, as it enables gigabit-level data rates for 6G. However, as compared to sub-6GHz signals, THz signals suffer from more severe coverage issue due to more significant propagation loss and vulnerability to line-of-sight (LoS) blockage, which hinders the applications of THz communications. In this

Sub-terahertz (Sub-THz) technology, as one of the key candidates for the six generation (6G) systems, has attracted increasing attention from academia and industry, due to its promise to unleash vast amounts of new frequency spectrum. Sub-THz system designs pose unique and more challenging circumstances compared to traditional communication systems. These challenges arise from the demanding propagation

Sub-THz communication systems are anticipated to play a major part in 6G. To develop those systems further, it is important to both analyze the possible coverage, and investigate the propagation channel properties that impact the design of equalizers, guard intervals, and other measures for combatting dispersion. This article describes the key effects based on extensive measurements with both a channel

The use of sub-Terahertz (sub-THz) band is gaining considerable attention in 6G networks. In this study, we introduce hardware and propagation integrated 3D Propagation Model to describe sub-THz channels and discuss its advantages over both deterministic and stochastic 6G channel models. The unexplored mutuality of localization and communication is presented and its potential in integrated sensing

Large reflection and diffraction losses in the Terahertz (THz) band give rise to degraded coverage abilities in non-line-of-sight (NLoS) areas. To overcome this, a non-intelligent reflecting surface (NIRS) can be used, which is essentially a rough surface made by metal materials. NIRS is not only able to enhance received power in large NLoS areas through rich reflections and scattering, but also costless

One of the principal differences between 5G-grade mobile millimeter wave (mmWave) and 6G (and beyond) terahertz (THz) band communications is the fact that the latter will often operate in the near field. This is because next-generation THz wireless solutions will have to keep the current physical size of the antenna systems or even increase them at the infrastructure side to combat spreading losses

Given the wide coverage of communication networks and tremendous number of mobile devices, it has been proposed to integrate wireless sensing capabilities into mobile communication networks so that the growing demands for ubiquitous sensing can be satisfied without extensively deploying dedicated sensing devices. In this article, we study integrated sensing and communication (ISAC) functionalities