Proposal and Evaluation of a Hidden Terminal Identification Method Using Terminal-to-Terminal Information Exchange for Highly Sensitive Carrier Sensing in LPWAN

Competitive access methods using carrier sense are used in LPWA-based wireless networks. Since the sensing detection range is finite, there is a problem of packet collision due to the inability to detect the signal being accessed. Identifying hidden terminals, which are terminals that cannot detect packet accesses, is effective in avoiding packet collisions. This study es-tablished a method to identify hidden terminals by evaluating the sensing performance of each terminal and sharing the evaluation results through inter-terminal communication. The effectiveness of the proposed method is demonstrated by computer simulation.