Method and device for indoor position resolution

A method for managing power consumption of a portable battery-powered user carried device, wherein the user carried device includes a direction sensor, a movement sensor and a radio receiver and an application for using the sensors for indoor positioning of the user carried device, the method comprising:

• determining a motion mode based on the information received from a first sensor selected from the direction sensor, the movement sensor and the radio receiver, wherein the motion mode describes a type of motion exhibited by the user carried device;
• and
• based on the determined motion mode, controlling a sampling rate of a second sensor so as to reduce power consumption, the second sensor being selected from the direction sensor, the movement sensor and the radio receiver, the second sensor being different from the first sensor;
• and
• selecting at least one of an operational mode and a location mode to be determined;
• and
• determining the operational mode based on the information received from one of the sensors, wherein the operational mode identifies a manner in which the user is operating the user carried device, and based on the determined operational mode, controlling a sampling rate of one or more of the sensors so as to reduce power consumption;
• and
• determining the location mode based on the information received from one of the sensors, wherein the location mode identifies a location of the user, and based on the determined location mode, controlling a sampling rate of one or more of the sensors so as to reduce power consumption.