Lei Liu - IEEE Xplore Author Profile

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This paper studies the application of cognitive radio inspired non-orthogonal multiple access (CR-NOMA) to reduce age of information (AoI) for uplink transmission. In particular, a time division multiple access (TDMA) based legacy network is considered, where each user is allocated with a dedicated time slot to transmit its status update information. The CR-NOMA is implemented as an add-on to the ...Show More
Ensuring reliable communication can be incredibly challenging in emergencies due to the breakdown of conventional infrastructure. However, a promising solution is on the horizon: the integration of reconfigurable intelligent surfaces (RIS) onto unmanned aerial vehicles (UAV), known as UAV-RIS. This innovative approach holds the potential to offer agile and adaptable communication services during c...Show More
Satellite-based Internet of Things (IoT), as an augment and extension of the terrestrial IoT, is expected to achieve the true interconnection of everything in the sixth-generation vision. However, in view of the massive and concurrent access requests within wide area coverage and the limited spectrum re-sources, the realization of efficient random access (RA) contention resolution has become one o...Show More
In view of the huge satellite images, which will consume a large amount of resources if they are completely transmitted to the ground for processing, an improved lightweight on-orbit image classification model is proposed in this study. By pushing the image processing task to the satellite, real-time processing is achieved and the ground communication burden is significantly reduced. The model is ...Show More