HashBeam: Enabling Feedback Through Downlink Beamforming in Unsourced Random Access
HashBeam: Enabling Feedback Through Downlink Beamforming in Unsourced Random Access
Unsourced random access (URA) has emerged as a candidate paradigm for massive machine-type communication (mMTC) in next-generation wireless networks. While many excellent uplink schemes have been developed for URA, these schemes do not specify a mechanism for providing feedback regarding whether a user's message was successfully decoded. While this may …