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This work introduces a new perspective for physical media sharing inmultiuser communication by jointly considering (i) the meaning of thetransmitted message and (ii) its function at the end user. Specifically, wehave defined a scenario where multiple users (sensors) are continuouslytransmitting their own states concerning a predetermined event. On the receiverside there is an alarm monitoring system, whose function is to decide whethersuch a predetermined event has happened in a certain time period and, if yes,in which user. The media access control protocol proposed constitutes analternative approach to the conventional physical layer methods, because thereceiver does not decode the received waveform directly; rather, the relativeposition of the absence or presence of energy within a multidimensionalresource space carries the (semantic) information. The protocol introduced hereprovides high efficiency in multiuser networks that operate withevent-triggered sampling by enabling a constructive reconstruction oftransmission collisions. We have demonstrated that the proposed method leads toa better event transmission efficiency than conventional methods like TDMA andslotted ALOHA. Remarkably, the proposed method achieves 100\% efficiency and0\% error probability in almost all the studied cases, while consistentlyoutperforming TDMA and slotted ALOHA.

A novel semantic-functional approach for multiuser event-trigger communication