Determining positions of beacon devices

A second apparatus comprising at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the second apparatus to at least perform:

• obtaining a report information, or a report information and at least one further report information, wherein the report information or the report information and the at least one further report information respectively comprise one or more identifiers and/or one more further identifiers of one or more beacon devices and a position information or a device identifier of a device that provided the report information and/or the at least one further report information, wherein obtaining the report information, or the report information and at least one further report information, comprises obtaining the report information, or the report information and at least one further report information, from a plurality of devices with the report information, or the report information and at least one further report information, having been collected during a same time interval having a duration that was calibrated by iteratively increasing or decreasing the duration of the time interval depending on an accuracy of a determined position of at least one of the one or more beacon devices;
• determining the position information associated with the report information and/or with the further report information in case the report information and/or the further report information do not comprise such position information, wherein the position information is determined based at least partially on the device identifier and/or the further device identifier comprised by the obtained report information and/or the obtained further report information;
• and
• determining a position of at least one of the one or more beacon devices based at least partially on the one or more identifiers and/or the one or more further identifiers of the one or more beacon devices and the position information comprised by the obtained report information and/or by the obtained further report information and/or the determined position information, wherein determining the position of the at least one of the one or more beacon devices comprises determining the position of the at least one of the one or more beacon devices based on the report information, or the report information and at least one further report information, from the plurality of devices that was collected during the same time interval and that includes the identifier of the at least one of the one or more beacon devices.