Method for determining positions of a plurality of terminal devices by a server

A computing apparatus, comprising:

• a processing unit and a communication unit for communicating with a plurality of terminal devices,
• wherein the communication unit is configured to:
• receive from at least one of the plurality of terminal devices wherein each terminal device is allocated to one of predetermined one or more clusters, first global navigation satellite system (GNSS) information according to predetermined transmission patterns of the plurality of terminal devices, and receive from at least one of the plurality of terminal devices second GNSS information at random;
• collect context related data from one or more context sources that are different from the plurality of terminal devices;
• and wherein the processing unit is configured to:
• update the set of predetermined one or more clusters by allocating each terminal device to a respective cluster based on at least a part of the context related data and the first and the second GNSS information and a predetermined criteria of cluster's accuracy;
• determine, based on the first and the second GNSS information and on the updated one or more clusters of the plurality of terminal devices, respective positions of the one or more clusters;
• and
• obtain individual positions of the plurality of terminal devices according to the respective positions of the one or more clusters.

An apparatus comprising one or more tangible, non-transitory, computer-readable media storing instructions which, when executed by one or more processors, cause the one or more processors to perform operations comprising:

• collecting context related data from one or more context sources that are different from a plurality of terminal devices, wherein the collecting occurs in response to receiving, from at least one of the plurality of terminal devices wherein each terminal device is allocated to one of predetermined one or more clusters, first global navigation satellite system (GNSS) information according to predetermined transmission patterns of the plurality of terminal devices, and from at least one of the plurality of terminal devices second GNSS information at random;
• updating the set of predetermined one or more clusters by allocating each terminal device to a respective cluster based on at least a part of the context related data and the first and the second GNSS information and a predetermined criteria of cluster's accuracy;
• determining based on the first and the second GNSS information and on the updated one or more clusters of the plurality of terminal devices, respective positions of the one or more clusters;
• and
• obtaining individual positions of the plurality of terminal devices according to the respective positions of the one or more clusters.