A method includes, responsive to a trigger event, establishing a session between a first device and a set of second devices. Session data is exchanged with the second devices in the session. The session data includes identity data and position data. A relative position of each of the second devices in the session relative to the first device is determined based on the position data. Event data and data including the relative position associated with the session are logged. A selected one of the set of second devices is removed from the session responsive to a termination event and the exchanging of the session data with the selected one of the second devices is terminated.