Recording medium on which indoor/outdoor determination program is recorded, indoor/outdoor determination system, indoor/outdoor determination method, mobile terminal, and means for classifying and determining indoor/outdoor environment
AssigneeNEC Corporation
InventorAkio Aoyama
Life of this patent
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Abstract
An indoor/outdoor determination program, etc., whereby an indoor or outdoor state can be determined with higher precision than by a determination method based on satellite reception strength in which a threshold value is difficult to set. The indoor/outdoor determination program according to the present invention causes a step to be executed for determining whether a mobile terminal is present indoors or outdoors on the basis of satellite elevation angle information and/or satellite azimuth angle information acquired directly or indirectly from a satellite receiver provided to the mobile terminal.
Claims9
An indoor/outdoor determination method of determining whether a mobile terminal exists indoors or outdoors by use of a hardware resource, the method comprising:
- determining whether the mobile terminal exists indoors or outdoors, based on at least either of satellite elevation angle information and satellite azimuth angle information directly or indirectly acquired from a satellite receiver provided in the mobile terminal,
- counting a first satellite count existing in a first elevation angle range, based on the satellite elevation angle information;
- counting a second satellite count existing in a second elevation angle range higher than the first elevation angle range, based on the satellite elevation angle information;
- calculating a satellite count ratio between the first satellite count and the second satellite count;
- making a determination for locations of indoors when the satellite count ratio is greater than or equal to a first satellite count ratio threshold value which is preset;
- and
- making an outdoor determination when the satellite count ratio is not greater than or equal to the first satellite count ratio threshold value.
An indoor/outdoor determination method of determining whether a mobile terminal exists indoors or outdoors by use of a hardware resource, the method comprising:
- determining whether the mobile terminal exists indoors or outdoors, based on at least either of satellite elevation angle information and satellite azimuth angle information directly or indirectly acquired from a satellite receiver provided in the mobile terminal,
- calculating an average elevation angle, a maximum elevation angle, and an elevation angle standard deviation, based on the satellite elevation angle information;
- making an outdoor determination when the average elevation angle is not less than or equal to an average elevation angle threshold value which is preset;
- making an outdoor determination when the maximum elevation angle is not less than or equal to a first maximum elevation angle threshold value which is preset;
- making an outdoor determination when the elevation angle standard deviation is not less than or equal to an elevation angle standard deviation threshold value which is preset;
- and
- making a determination for locations of indoors when the average elevation angle is less than or equal to the average elevation angle threshold value, the maximum elevation angle is less than or equal to the maximum elevation angle threshold value, and the elevation angle standard deviation is less than or equal to the elevation angle standard deviation threshold value.
An indoor/outdoor determination method of determining whether a mobile terminal exists indoors or outdoors by use of a hardware resource, the method comprising:
- determining whether the mobile terminal exists indoors or outdoors, based on at least either of satellite elevation angle information and satellite azimuth angle information directly or indirectly acquired from a satellite receiver provided in the mobile terminal,
- calculating a composite standard deviation of an elevation angle and an azimuth angle of a satellite transmitting a receivable radio wave, based on the satellite elevation angle information and the satellite azimuth angle information;
- making an outdoor determination when the composite standard deviation is not less than or equal to a first composite standard deviation threshold value which is preset;
- assessing whether or not the composite standard deviation is less than or equal to a second composite standard deviation threshold value less than the first composite standard deviation threshold value when the composite standard deviation is less than or equal to the first composite standard deviation threshold value;
- making an indoor and not-near-a-window determination when the composite standard deviation is less than or equal to the second composite standard deviation threshold value;
- and
- making an indoor and near-a-window determination when the composite standard deviation is not less than or equal to the second composite standard deviation threshold value.
Dependencies are inferred from the claim text.