Building BIOS Architecture

The BIOS shall provide authoritative time, location, and operational context to components and higher-level services.

The Time Service shall provide:

current time;

timezone;

synchronization status;

time source;

accuracy estimate;

monotonic sequence reference;

daylight-saving handling where applicable.

A loss or correction of wall-clock time shall not reverse event ordering. Safety-critical durations shall use monotonic time sources where possible.

The Location Service shall maintain hierarchical building locations such as:

site;

building;

level;

zone;

room;

structural grid;

Node;

Interface;

The Context Service may represent:

normal occupancy;

unoccupied condition;

construction;

commissioning;

maintenance;

emergency;

fire response;

power outage;

network isolation;

severe weather;

Location and context data derived from inference shall be identified as inferred. Privacy-sensitive occupant context shall be minimized, protected, and separated from basic engineering configuration where possible.