On Proximity Application Server

In this article, we consider application programming issues for proximity-based services. The work uses the abbreviation ProSe (Proximity Services), introduced in the 3GPP specifications. According to the 3GPP specifications, proximity-based services are designed to find devices suitable for organizing direct interaction between devices (D2D - Device to Device). In our case, we consider another approach in which the determination of closely spaced devices is the ultimate goal of the process. The direct connection of devices is not considered at all, and the main reason for this is security-related problems. The paper considers an approach in which the determination of proximity to a device or devices is the basis for the presentation of data or services without the direct connections between devices.