Compressive RF Fingerprint Acquisition and Broadcasting for Dense BLE Networks

This paper presents a novel bluetooth low energy (BLE) protocol enabling a BLE node to perform RF fingerprint acquisition by measuring the received signal strength (RSS) from its neighboring nodes and simultaneously broadcast the acquired fingerprint via its advertising packet. However, the fingerprint acquisition and broadcast process in a dense BLE network is very challenging owing to: 1) the likelihood of packet collision; and 2) the length-constrained packet. To this end, we exploit a compressive sensing (CS) framework allowing each node to acquire no more than $M$ measurements from a very dense network, in which the number of nodes $N$ is far greater than $M$ . By aggregating the $M$ -dimensional compressed fingerprint vector from $s