HIGHLIGHTS
SUMMARY
Future wireless networks will meet an increasing requirement for wireless applications such as high spectral efciency and low power consumption. With these advantages, the RIS has sparked great research interests, such as the nonorthogonal multiple access (NOMA) networks, the SWIPT networks, the hybrid satellite-terrestrial networks, the multicell network, and the mobile edge computing (MEC) network, where a passive RIS and relay-assisted MEC scheme was proposed. Ten, the authors of_[22, 23] investigated the active RIS-assisted secure transmission for satellite terrestrial networks, and the results suggested the superiority of active RIS when . . .
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