BLE networking systems and methods providing central and peripheral role reversal with enhanced peripheral location determination using constant tone extension analysis for a same channel

A BLE communications system, comprising:

• an end node (EN);
• an access point (AP) configured to connect to a network and transmit a first beacon advertisement message;
• and
• a plurality of reference points (RPs) configured to transmit a second beacon advertisement message,
• wherein
• the EN is configured to
• detect the first and second beacon advertisement messages,
• initiate a connection with at least one of the plurality of RPs at a first frequency, and
• transmit a Constant Tone Extension (CTE) to the at least one of the plurality of RPs, and
• the at least one of the plurality of RPs is configured to
• receive the CTE, and sample the CTE in in-phase and quadrature (IQ) format, and
• transmit the sampled CTE, a signature CTE, and position information to the EN at the first frequency, in which
• the EN is further configured to determine a location thereof based on the sampled CTE, the signature CTE, and the position information, and transmit the location via the AP based on a positive evaluation at a time of transmission of the first beacon advertisement message of each of at least (a) whether a proximity of the AP to the EN is a nearest AP proximity and (b) a loading of the network to which the AP is connected.