  The focus of this paper is on the rate and power control algorithms in
Dedicated Short Range Communication (DSRC) for vehicular networks. We first
propose a utility maximization framework by leveraging the well-developed
network congestion control, and formulate two subproblems, one on rate control
with fixed transmit powers and the other on power control with fixed rates.
Distributed rate control and power control algorithms are developed to solve
these two subproblems, respectively, and are proved to be asymptotically
optimal. Joint rate and power control can be done by using the two algorithms
in an alternating fashion. The performance enhancement of our algorithms
compared with a recent rate control algorithm, called EMBARC, is evaluated by
using the network simulator ns2.
