Abstract

AbstractThis chapter studies massive access in cell-free massive MIMO-based IoT systems and solves the challenging AUD and CE problems. For the uplink transmission, we propose an advanced frame structure design to reduce the access latency. Moreover, by considering the cooperation of all access points (APs), we investigate two processing paradigms at the receiver for massive access: cloud computing and edge computing. We reveal that the edge computing can achieve the similar massive access performance as the cloud computing, and the edge computing is capable of alleviating the burden on cloud processing unit (CPU), having a faster access response, and supporting more flexible AP cooperation.

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