Nericell - Nericell: Rich Monitoring of Road and Traffic...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Nericell: Rich Monitoring of Road and Traffic Conditions using Mobile Smartphones Prashanth Mohan, Venkata Padmanabhan, Ramachandran Ramjee. Microsoft Research India, Bangalore Presented by: Philip Shibly
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Topics What is Nericell? Framework Acceleration Orientation and Reorientation Validation Road and Traffic Conditions Bump Detection Stop-and-Go Audio Localization Energy
Background image of page 2
What is Nericell? Smartphone system that monitors road and conditions in developing regions. Tailored to complex traffic flow and degraded roadways. Avoids usage of infrastructure or area networks. Tested in Bangalore, India.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Framework How to sense congestion? How to sense road conditions? How to determine location? How to be efficient?
Background image of page 4
Congestion: accelerometer Monitors acceleration to determine braking and congestion. Uses the 3-axis accelerometer but must account for orientation. Does not make assumption that everyone has their phone in the same orientation in the car. Developed an algorithm for determining orientation and then virtually reorienting the accelerometer. Monitors for user-interaction with the phone and neglects those readings. Validates the reorientation and develops heuristics to detect bumps, potholes and braking under certain speed conditions.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Defines orthogonal axes with respect to the phone as (x, y, z). Defines orthogonal axes with respect to the vehicle as (X, Y, Z). If they are equal, we say that the phone is well-oriented . If not, it is disoriented. Accelerometer readings relate to the frame of references as
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 21

Nericell - Nericell: Rich Monitoring of Road and Traffic...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online