A Low-Power Self-service Bus Arrival Reminding
Algorithm on Smart Phone
Xuefeng Liu, Jingjing Fan, Jianhua Mao, and Fenxiao Ye
School of Communication and Information
Engineering, Shanghai University, China
Abstract: In this paper, a low-power self-service bus arrival
reminding algorithm on smart phone is proposed and implemented. The algorithm
first determines the current position of the bus by Global Positioning
System (GPS) module in smart phone and calculates the linear distance from
the bus current position to the destination station, then sets a buffer
distance for reminding passengers of getting off the bus, estimates the bus
maximum speed and calculates the minimum time of approaching the buffer. In
terms of the time, the frequency of the GPS location and the distance
calculation between the bus and the destination station is intelligently
adjusted. Once the distance to destination station is within the buffer
distance, smart phone will immediately remind passengers to get off. The test
result shows that the algorithm can timely provide personalized arrival
reminding service, efficiently meet the requirements of different passengers
and greatly reduce the power consumption of smart phone.
Keywords: Bus arrival reminding algorithm, power consumption, buffer
distance, GPS location.