This work introduces a new perspective for physical media sharing in multiuser communication by jointly considering (i) the meaning of the transmitted message and (ii) its function at the end user. Specifically, we have defined a scenario where multiple users (sensors) are continuously transmitting their own states concerning a predetermined event. On the receiver side there is an alarm monitoring system, whose function is to decide whether such a predetermined event has happened in a certain time period and, if yes, in which user. The media access control protocol proposed constitutes an alternative approach to the conventional physical layer methods, because the receiver does not decode the received waveform directly; rather, the relative position of the absence or presence of energy within a multidimensional resource space carries the (semantic) information. The protocol introduced here provides high efficiency in multiuser networks that operate with event-triggered sampling by enabling a constructive reconstruction of transmission collisions. We have demonstrated that the proposed method leads to a better event transmission efficiency than conventional methods like TDMA and slotted ALOHA. Remarkably, the proposed method achieves 100\% efficiency and 0\% error probability in almost all the studied cases, while consistently outperforming TDMA and slotted ALOHA.

翻译：本文通过联合考虑(i)传输消息的含义及其(ii)在终端用户处的功能，为多用户通信中的物理介质共享引入了新的视角。具体而言，我们定义了一个场景：多个用户（传感器）持续传输其关于预定事件的状态。接收端设有报警监控系统，其功能是判断在特定时间段内是否发生了该预定事件，若发生则进一步确定是哪个用户。所提出的媒体访问控制协议构成了对传统物理层方法的替代方案，因为接收器并不直接解码接收波形；相反，多维资源空间中能量存在或缺失的相对位置承载了（语义）信息。本文提出的协议通过实现传输碰撞的建设性重构，在采用事件触发采样的多用户网络中提供了高效率。我们已证明，所提方法在事件传输效率上优于TDMA和时隙ALOHA等传统方法。值得注意的是，在几乎所有研究案例中，所提方法均实现了100%的效率及0%的错误概率，并且始终优于TDMA和时隙ALOHA。