Accurate short range positioning with wireless signals

A method implemented by a positioning cell for supporting positioning determination of a communication device in a wireless communication network, the method comprising:

• receiving by the positioning cell from a master positioning cell a plurality of tight synchronization signals;
• determining by the positioning cell a plurality of time differences between times of arrival of the plurality of tight synchronization signals and theoretical times of arrival of the plurality of tight synchronization signals, where the theoretical times of arrival are corrected by theoretical times of flight along a direct line-of-sight path from the master positioning cell to the positioning cell;
• synchronizing the positioning cell based on one or more of the received tight synchronization signals adjusted by one or more of the plurality of time differences, wherein the synchronizing comprises synchronizing a clock in the positioning cell;
• emitting by the positioning cell to the communication device in the wireless communication network a positioning signal at a time determined by the synchronized clock;
• wherein the positioning signal comprises data indicative of an identifier of the positioning cell;
• wherein the positioning signal is transmitted so as not to interfere with positioning pilot signals transmitted by the wireless communication network.