Dynamic MBSFN Beam Area Formation in 6G Multibeam Non-Terrestrial Networks

Models, Methods, and Solutions for Multicasting in 5G/6G mmWave and Sub-THz Systems

“…Sidelink technology, which is an extension of the LTE system allowing for D2D communications without using BS as an intermediate point, can be utilized to bridge over the multicast difficulties [198], [199]. For example, in such a system, sidelinks may provide service to UEs experiencing degraded Sidelink assistance [122] Energy reduction Heuristic algorithms for multicast data delivery [123] Optimal multicast scheduling Group partition and beam selection algorithm [124] Optimal user partitioning Multicast scheduling algorithm [125] Power consumption/interference minimization Relay selection and power allocation algorithm [126] Latency, reliability, data rate, and spectral efficiency Location-based hybrid multiple access scheme [127] Secure data delivery Approach for assessment of relay trustworthiness [128] Sidelink transmission security Reliable management of multicast services in a 5G IoT [129] System capacity maximization Spectrum sharing and caching selection strategy RIS assistance [130] Power control, QoS, fairness RIS optimization algorithm [131] Downlink power control Passive beamforming scheme [132] Energy efficiency maximization RIS-based resource allocation methods [133] Choice of the optimal reflection coefficients Analytical method for RIS configuration [134] Secure RIS beamforming Analytical optimization via semidefinite relaxation [135] Maximization of RIS secrecy rate Analytical assessment via stochastic geometry [136] Channel capacity maximization Optimization via gradient descent method [137] Simultaneously transmitting and reflecting RISs Overview of state-of-the-art algorithms [138] RIS-assisted multicasting modeling Analytical model via queuing theory NTN assistance [139] Radio resource sharing Resource allocation cooperative T-NTN algorithm [140] Simultaneous usage of NTN/terrestrial systems Cooperative multicast/unicast transmission scheme [141] Spectral efficiency maximization Radio resource management scheme [142] Capacity and spectral efficiency maximization Dynamic beam area formation algorithm [143]- [146] Exhaustive coverage of NTN usage in 5G/6G Survey covering NTN-aided multicasting MEC assistance…”

“…The schemes are compared in terms of the Aggregate Data Rate (ADR), UE throughput, and system spectral efficiency. The idea of grouping adjacent beams into a single MBA is further studied in [142], where the Dynamic MBSFN Beam Area Formation (D-MBAF) algorithm is proposed. D-MBAF leverages multicast subgrouping and simultaneously serves subsets of users at different data rates.…”