Multi-level location disambiguation

A mobile station comprising:

• an antenna;
• a transceiver communicatively coupled to the antenna to transmit outbound wireless communications to, and receive inbound wireless communications from, a wireless transceiver;
• a pressure sensor configured to determine atmospheric pressure on the mobile station;
• and
• a processing unit communicatively coupled to the transceiver and the pressure sensor and configured to:
• measure a first pressure at the mobile station at a first location within the structure;
• measure a second pressure at the mobile station at a second location within the structure;
• determine a pressure differential threshold based on the first location within the structure, the pressure differential threshold being indicative of a pressure difference between adjacent vertically displaced floors within a structure, or a substantial portion thereof;
• make a determination, based on the second location relative to a floor transition within the structure, that a pressure differential between the first pressure and the second pressure exceeds the pressure differential threshold;
• and
• disambiguate a location of the mobile station in response to the determination that the pressure differential between the first pressure and the second pressure exceeds the pressure differential threshold.

A computer-readable storage device comprising processor-readable instructions configured to cause a processor to:

• measure a first pressure at a mobile station at a first location within the structure;
• measure a second pressure at the mobile station at a second location within the structure;
• determine a pressure differential threshold based on the first location within the structure, the pressure differential threshold being indicative of a pressure difference between adjacent vertically displaced floors within a structure, or a substantial portion thereof;
• make a determination, based on the second location relative to a floor transition within the structure, that a pressure differential between the first pressure and the second pressure exceeds the pressure differential threshold;
• and
• disambiguate a location of the mobile station in response to the determination that the pressure differential between the first pressure and the second pressure exceeds the pressure differential threshold.

A mobile station comprising:

• means for measuring a first pressure at the mobile station at a first location within the structure;
• means for measuring a second pressure at the mobile station at a second location within the structure;
• determining a pressure differential threshold based on the first location within the structure, the pressure differential threshold being indicative of a pressure difference between adjacent vertically displaced floors within the structure, or a substantial portion thereof;
• means for determining, based on the second location relative to a floor transition within the structure, that a pressure differential between the first pressure and the second pressure exceeds the pressure differential threshold;
• and
• means for disambiguating a location of the mobile station in response to a determination that the pressure differential between the first pressure and the second pressure exceeds the pressure differential threshold.