Dataset of Communication Latency in U Space system

DATASET MIGRATED FROM FIGSHARE: <p dir="ltr">In the U-Space ecosystem, effective communication between U-Space Service Providers (USSP), Common Information Service Providers (CISP), and drone operators is critical for ensuring the safety and efficiency of Unmanned Aerial Vehicle (UAV) operations. One key challenge is reducing communication latency, which impacts the responsiveness of time-critical services. This study evaluates latency performance across two communication protocols—push–pull (using REST-API and ZeroMQ) and publish–subscribe (using AMQP and MQTT)—within a real case study on drone detection. Latency measurements were collected for core operations such as conformance monitoring, flight plan approval, and alert dissemination under varying message intervals and payload sizes. The findings reveal that message interval significantly affects latency, whereas payload size has a lesser impact. Push–pull protocols consistently achieved lower and more stable latency than publish–subscribe mechanisms, although both approaches met the latency requirements outlined by EASA for U-Space systems. </p>