For randomly distributed nodes sending packets to a central gateway using slotted Aloha with a constrained number of retransmissions over a wireless fading channel, we take an iterative approach to compute the total traffic density of packet transmissions and collision-induced retransmissions as a function of the node-gateway distance. From this, we compute the outage probability, throughput, and energy consumption. This method can be used to analyze and dimension Low-Power Wide-Area Networks (LPWANs). Applying it in LoRa illustrates design tradeoffs concerning outage probability, spreading factors, energy consumption, and cell size. It notably shows that permitting more retransmissions helps the nodes near the gateway but hurts distant ones.
Calculating the Traffic Density in LPWANs with Finite Retransmissions
2024-06-24
435686 byte
Conference paper
Electronic Resource
English
Reducing Retransmissions in Point-to-Point Satellite Transmissions
British Library Conference Proceedings | 2008
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