ENERGY-EFFICIENT INDOOR LOCALIZATION SYSTEM AND A METHOD OF REDUCING POWER CONSUMPTION OF A RADIO BADGE IN THE INDOOR LOCALIZATION SYSTEM
First Claim
1. A method of reducing power consumption of a radio badge in a localization system, the radio badge being carried by a tracked target and being provided with a pedometer for detecting a footstep count of the tracked target, said method comprising:
- (a) estimating a velocity of the radio badge according to the footstep count detected by the pedometer;
(b) calculating a sleep time from the velocity of the radio badge; and
(c) controlling the radio badge to discontinue emitting radio signals during the sleep time.
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Accused Products
Abstract
A method of reducing power consumption of a radio badge in a localization system is disclosed, in which the radio badge is carried by a tracked target and is provided with a pedometer for detecting a footstep count of the tracked target. The method includes: estimating a velocity of the radio badge according to the footstep count detected by the pedometer; calculating a sleep time from the velocity of the radio badge; and controlling the radio badge to discontinue emitting radio signals during the sleep time. An indoor localization system that performs the method is also disclosed.
31 Citations
16 Claims
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1. A method of reducing power consumption of a radio badge in a localization system, the radio badge being carried by a tracked target and being provided with a pedometer for detecting a footstep count of the tracked target, said method comprising:
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(a) estimating a velocity of the radio badge according to the footstep count detected by the pedometer; (b) calculating a sleep time from the velocity of the radio badge; and (c) controlling the radio badge to discontinue emitting radio signals during the sleep time. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An indoor localization system comprising:
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a radio badge adapted to be carried by a tracked target and capable of emitting radio signals; a pedometer disposed on said radio badge, and detecting and outputting a footstep count of the tracked target; a mobility estimator for estimating a velocity of said radio badge according to the footstep count outputted by said pedometer; and a sampling rate adaptor for calculating a sleep time from the velocity of said radio badge, and for outputting a sleep time signal corresponding to the sleep time; wherein said radio badge receives the sleep time signal and responds thereto by discontinuing emitting of the radio signals during the sleep time. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification