The contributions of this paper are:
- Propose the vehicle density-based location privacy (DLP) scheme, which can mitigate the location tracking of vehicles by changing pseudonyms based on a threshold in neighboring vehicle count within a density zone.
- Derive the delay distribution and the expected total delay of a vehicle within the density zone.
- By experiment comparison results between proposed DLP scheme with both AMOEBA and Mix-Zone, the author claimed that proposed DLP scheme has a better
Question answer session
Q: What is density zone? How to know vehicle stay in density zone?
A: The density zone i is an zone area which consists of mi ports and ni intersections. All vehicles can enter and exit the density zone only via these ports. By installing radio receivers at opportune locations, the GPA can observe entering and exiting events of vehicles.
Q: What is ki , Iw?
A: ki is the total number of neighboring vehicles in a density zone i.
Iw is the instantaneous neighboring node density of vehicle w (or neighboring vehicle count). Each vehicle w determines its instantaneous neighboring node density Iw, (or neighboring vehicle count) by listening for beacon messages from its set of neighbors. If a vehicle w has not received a beacon message from another neighbor for ∆t, the vehicle w assumes that the link to its neighbor is lost. Therefore, the vehicle w decreases its neighboring vehicle count by 1. On the other hand, whenever vehicle w receives a beacon message from a new neighbor (i.e., with a new pseudonym), w will increase its neighboring vehicle count by 1.
