Beamforming-Aided NOMA Expedites Collaborative Multiuser Computational Offloading

Trust Degree-Based MISO Cooperative Communications with Two Relay Nodes

“…For multiple antenna systems, trust degree-based transmission strategies were proposed in [11][12][13][14][15]. In these works, the trust degree was considered as a parameter to quantify the social relationship.…”

“…In [14,15], the authors considered multiple trust degrees in their system models. However, in these works, the trust degrees were simply used for an on-off concept as a threshold.…”

“…The users who have trust degrees higher than the threshold are selected as the trustworthy users, so the users who have trust degrees lower than the threshold are filtered as the untrustworthy users. In [14], for a multiple-antenna system with multiple users, the multiuser computational offloading technique was investigated by combing the social trust degrees of the users. In [14], certain users were selected as trusted users based on their social trust degrees, and then the selected users were grouped into multiple pairs for the computational offloading.…”

“…In [14], for a multiple-antenna system with multiple users, the multiuser computational offloading technique was investigated by combing the social trust degrees of the users. In [14], certain users were selected as trusted users based on their social trust degrees, and then the selected users were grouped into multiple pairs for the computational offloading. In this work, the social trust degrees were only used to filter out untrustworthy users and the conventional zero-forcing (ZF) beamformer was applied as the cooperative beamforming.…”

“…In their proposed strategy, multiple users who have sufficiently high trust degrees cooperatively transmit data or jamming signals via virtual MISO channels among the users. In this work, similar to [14], the trust degree was used to select trustworthy users and filter out untrustworthy users. Hence, the relationship between multiple trust degrees was not fully exploited in designing the transmission strategy.…”