Characteristics of Transmit Power Allocation for Poor Conditioned End Devices in LPWAN with Peak Detection Based Carrier Sense

This paper investigates characteristics of transmit power allocation technique in low-power wide-area networks (LPWANs) with a carrier sense. Traditionally, we have studied the performance improvement technique for the end devices with high path loss to the gateway in the LPWAN. The technique can improve the performance of such end devices by allocating the transmit power so as to provide the benefit of the capture effect for all end devices. However, the effectiveness of the technique in the LPWAN with the carrier sense has never been verified. In Japan, wireless transceivers in sub-GHz band shall execute the carrier sense based on peak detection before transmitting a packet, and the performance must be verified. Numerical examples are provided to analysis the characteristics of the conventional technique in the LPWAN with the carrier sense based on peak detection.