Patent ID: 8171076

Claim:
A presence information provision method directed to a communication system which includes a plurality of communication terminals each associated with the presence of a specific user and a presence server for collecting presence information from the communication terminals and delivering presence information to the communication terminals, the method comprising: a circumstance presence information creation step for creating circumstance presence information pertaining to the user associated with one of the communication terminals in response to a change in value of sensor data transmitted from at least one sensor node terminal; and for the presence server to provide presence information, a circumstance presence information delivery step for delivering the circumstance presence information created in relation to said user associated with one of the communication terminals either in place of any previous presence information for said user associated with one of the communication terminals or in combination with any previous presence information for said user associated with one of the communication terminals, wherein the sensor data is transmitted from a non-presence-ready terminal, and wherein the circumstance presence information creation step creates the circumstance presence information from the sensor data in accordance with contents of a conversion table having a correspondence predefined between contents of the sensor data and contents of the circumstance presence information.