In LoRa (Long Range), when a collision occurs in the network, each end-device has to retransmit its colliding frame, which reduces the throughput, and increases the energy consumption of the end-devices and the delay of the frames. In this paper, we propose an algorithm to decode colliding synchronized LoRa signals and thus improve the overall performance of the network. Indeed, we use successive transmissions of bitmaps by the end-devices to determine the correct symbols of each colliding frame, instead of retransmitting the whole frames. Simulation results show that our algorithm is able to significantly improve the overall throughput of LoRaWAN, and to decrease the energy consumption and the delay of the transmitters.
In @cite_7 , the authors provide an analysis and report experimental validation of the various performance metrics of the LoRa technology. The LoRa modulation is based on CSS, which enables low-quality oscillators in the end-device, and faster and more reliable synchronization. Therefore, LoRa seems to be a promising option for implementing communication in many diverse IoT applications. Authors first overviewed the features and analyzed the scalability of LoRa network. Then, they introduced setups of the performance measurements. Their results showed that using the transmit power of 14 dBm and the highest spreading factor of 12, more than 60
@cite_7
2595511394
The article provides an analysis and reports experimental validation of the various performance metrics of the LoRa low-power wide-area network technology. The LoRa modulation is based on chirp spread spectrum, which enables use of low-quality oscillators in the end device, and to make the synchronization faster and more reliable. Moreover, LoRa technology provides over 150 dB link budget, providing good coverage. Therefore, LoRa seems to be quite a promising option for implementing communication in many diverse Internet of Things applications. In this article, we first briefly overview the specifics of the LoRa technology and analyze the scalability of the LoRa wide-area network. Then, we introduce setups of the performance measurements. The results show that using the transmit power of 14 dBm and the highest spreading factor of 12, more than 60 of the packets are received from the distance of 30 km on water. With the same configuration, we measured the performance of LoRa communication in mobile scenar...