Coded random access with simple header detection for finite length wireless IoT networks

In this paper, we propose a simple header detection technique to identify multiple device connections for finite length wireless Internet-of-things (IoT) networks. The Hadamard codes are selected to guarantee low computational complexity, while finite length, defined as finite number of time-slots, is considered to fulfill the requirement of low network latency required by the fifth generation (5G) networks. The capture effect algorithm is exploited to detect multiple packets in a single time-slot. We also analyze the IoT wireless networks behavior using network extrinsic information transfer (EXIT) analysis followed by packet-loss rate (PLR) performances evaluated theoretically and numerically by computer simulations. We found that Hadamard codes work effectively as identity (ID) of devices for finite length wireless IoT networks even though the number of users per time-slot is unknown. PLR derived theoretically is also found to be valid enough even for very short number of time-slots.

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