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Cache-Aware Cooperative Multicast Beamforming in Dynamic Satellite-Terrestrial Networks by Yuan, Shuo; Sun, Yaohua; Peng, Mugen is a scholarly article available to read on EtoBox.

What is Cache-Aware Cooperative Multicast Beamforming in Dynamic Satellite-Terrestrial Networks about?

With the burgeoning demand for data-intensive services, satellite-terrestrial networks (STNs) face increasing backhaul link congestion, deteriorating user quality of service (QoS), and escalating power consumption. Cache-aided STNs are acknowledged as a promising paradigm for accelerating content delivery to users and alleviating the load of backhaul links. However, the dynamic nature of low earth orbit (LEO) satellites and the complex interference among satellite beams and terrestrial base stations pose challenges in effectively managing limited edge resources. To address these issues, this paper proposes a method for dynamically scheduling caching and communication resources, aiming to reduce network costs in terms of transmission power consumption and backhaul traffic, while meeting user QoS demands and resource constraints. We formulate a mixed timescale problem to jointly optimize cache placement, LEO satellite beam direction, and cooperative multicast beamforming among satellite beams and base stations. To tackle this intricate problem, we propose a two-stage solution framework, where the primary problem is decoupled into a short-term content delivery subproblem and a long-te

Author

Yuan, Shuo; Sun, Yaohua; Peng, Mugen

Published

2025

Language

EN