Orthogonal Time Frequency Space-Special Interest Group (OTFS-SIG)

Over the past few years, communication technologies for emerging high-mobility applications are much less understood and significantly under-developed. The recently developed OTFS has been recognized globally for its great potential to achieve high-speed and high-reliable communications in a high-mobility environment. While some initial works on the concepts and the implementations of OTFS have been investigated, there are still several challenges and open problems to be addressed.

This SIG is to provide a platform to bring together academic and industrial researchers in an effort to identify and discuss the major technical challenges, recent breakthroughs, and new applications related to OTFS.

Satellite Mega-constellations: Communications and Networking

There is rejuvenated interest in satellite communications and networking. Both the satellite and cellular (3GPP) industries aim at developing a seamlessly integrated one network with both terrestrial and satellite components. One main difference between the legacy satellite systems and the mega-constellations of the 6G era (next-generation) satellite system is the networking aspect. The next-generation satellite networks are expected to have very high-speed inter-satellite links. For efficient operation, the network will have to be autonomous, intelligent, resilient, self-organizing & self-controlling as much as possible to reduce the cost and risk of human intervention in such highly complicated settings. Distributed decision making, fault recovery, resilience, and scalability are among the important features of the envisioned satellite networks. These networks will rely on artificial intelligence (AI) techniques as much as possible, at all levels: Ground operations, on-board operations, as well as inter-satellite (FSO) and satellite-to-ground links (RF and/or FSO). In addition to networking, the scope of the SIG includes the communications aspects as well for AI-enabled channel prediction and optimized physical layer; grouping them in a single project is envisioned to provide synergy. High altitude platform station (HAPS) systems and HAPS constellations are also expected to play a significant role in the seamless integration of the mega-constellations with the terrestrial networks. Clearly, the satellite mega-constellations in the 6G era will create unprecedented opportunities once the unprecedented challenges are addressed by the research community.