Spatial-Temporal Query for Cognitive IoT Contexts

A computing device comprising:

• a processor;
• a first storage device storing a set of instructions, wherein an execution of the set of instructions by the processor configures the computing device to perform acts, comprising:
• receiving a query range in a multi-dimensional space;
• mapping the query range into a set of fragments of a space-filling curve that fills the multi-dimensional space;
• and
• using each mapped fragment in the set of mapped fragments as a key to query a database for context objects;
• and
• a second storage device storing the context objects of the database.

A computer program product comprising:

• a non-transitory computer-readable storage device having program instructions stored thereon, the program instructions being executable by a processor, the program instructions comprising sets of instructions for:
• receiving a context object having a context range in a multi-dimensional space;
• mapping the context range into a set of fragments of a space-filling curve that fills the multi-dimensional space;
• and
• storing the context object in a database by using each mapped fragment as an index.