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PhD Defense - Hongsheng Lu

Start: 7/23/2015 at 8:30AM
End: 7/23/2015 at 12:00PM
Location: 258 Fitzpatrick Hall
Attendees: Faculty and students are welcome to attend the presentation portion of the defense. Light refreshments will be served.
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Hongsheng Lu

July 23, 2015                          8:30 am                    258 Fitzpatrick Hall

Adviser:  Dr. Christian Poellabauer

Committee Members:

Dr. Sharon Hu        Dr. John Kenney        Dr. Aaron Striegel


Title

"IMPROVING THE SCALABILITY PERFORMANCE OF DEDICATED SHORT RANGE COMMUNICATIONS" 

The technology of Dedicated Short Range Communication provides a cost-effective alternative to construct a futuristic accident-free traffic system by connecting vehicles, infrastructures and pedestrians wirelessly. The fundamental concept is to enable information exchange between different road participants so that enhanced awareness of traffic situation is obtained. Human errors which are the primary contributor to traffic accidents will be limited and improved road safety can be achieved.
  
  This dissertation focuses on DSRC-based safety communications between vehicles which by default can transmit up to ten messages every second. These messages, without regulation, may saturate the channel, leading to significant packet loss and reduced message throughput. On the application level, this indicates deteriorated accuracy in vehicle tracking, resulting in inconsistent user experience. This dissertation proposed several techniques to improve the scalability performance of DSRC. We leveraged adaptation of several control parameters including transmission power, message rate of a DSRC device to prevent channel from being saturated. These algorithms are demonstrated to achieve a better utilization of channel bandwidth and lead to supreme application performance than the existing DSRC communication scheme in a wide range of vehicle-density environments.

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