Method for collaborative storage of event-related data in sensor networks and sensor network capable of providing a file system for storing event-related data

For storing event-related data within a wireless sensor network more efficiently, the invention proposes a method for storing event-related data of pre-defined events detected with a wireless sensor network comprising a plurality of sensor nodes with the steps of a) providing at least one event type by defining at least one condition, wherein an event of said event type is detected when sensor data generated by at least one of said sensor nodes (100, 312, 314, 322, 324) satisfies said defined condition, b) defining a storage size for storing event-related data for detected events of the defined event type, c) automatically organizing the sensor network (200) to form at least one zone (310, 320) associated with the defined event type, said zone (310, 320) comprising a group of sensor nodes (312, 314, 322, 324), wherein the total storage capacity of the sensor nodes of said group has at least the defined storage size for storing the event-related data. The invention further proposes a wireless sensor network adapted to perform the method.