Despite the basic premise that next-generation wireless networks (e.g., 6G) will be artificial intelligence (AI)-native, to date, most existing efforts remain either qualitative or incremental extensions to existing “AI for wireless” paradigms. Indeed, creating AI-native wireless networks faces significant technical challenges due to the limitations of data-driven, … [Read more...] about Causal Reasoning: Charting a Revolutionary Course for Next-Generation AI-Native Wireless Networks
6G mobile communication
Perpetual Reconfigurable Intelligent Surfaces Through In-Band Energy Harvesting: Architectures, Protocols, and Challenges
Reconfigurable intelligent surfaces (RISs) are considered a key enabler of highly energy-efficient 6G and beyond networks. This property arises from the absence of power amplifiers in the structure, in contrast to active nodes, such as small cells and relays. However, a certain amount of power is still required for RIS operation. To improve their energy efficiency further, we … [Read more...] about Perpetual Reconfigurable Intelligent Surfaces Through In-Band Energy Harvesting: Architectures, Protocols, and Challenges
Orthogonal Frequency Division Multiplexing: The Way Forward for 6G Physical Layer Design?
Sixth generation promises to have a variety of applications, as well as network entities, in terms of power, range, data rates, latency, and propagation environment. The overall heterogeneity of the network poses significant challenges in terms of physical (PHY) layer design. This article first identifies some of the areas where the 5G multinumerology orthogonal frequency … [Read more...] about Orthogonal Frequency Division Multiplexing: The Way Forward for 6G Physical Layer Design?
Toward 6G Multicell Orthogonal Time Frequency Space Systems: Interference Coordination and Cooperative Communications
Supporting high mobility is an important feature of the 6G mobile communication systems, which puts forward a great challenge for conventional orthogonal frequency division multiplexing (OFDM) systems due to the severe Doppler effects. Recently, orthogonal time frequency space (OTFS) has been proposed as a promising waveform for high-mobility scenarios, due to its excellent … [Read more...] about Toward 6G Multicell Orthogonal Time Frequency Space Systems: Interference Coordination and Cooperative Communications
Reconfigurable Intelligent Surface-Aided Near-Field Communications for 6G: Opportunities and Challenges
Reconfigurable intelligent surface (RIS)-aided near-field communications are investigated. First, the necessity of investigating RIS-aided near-field communications and the advantages brought about by the unique spherical wave-based near-field propagation are discussed. Then, the family of patch array-based RISs and metasurface-based RISs is introduced along with respective … [Read more...] about Reconfigurable Intelligent Surface-Aided Near-Field Communications for 6G: Opportunities and Challenges
