Comparison of adaptive medium access control schemes for beacon-vehicle communications

Efficient medium access control schemes are essential for beacon-vehicle communications because of the limited communication zone and randomly arriving vehicles. Several options of data collision recovery mechanisms (such as random delay and persist mechanisms) are presented and evaluated through simulation based on realistic traffic scenarios, antenna configurations and channel characteristics. It is shown that, by choosing the appropriate protocol options and control parameters, high system performance can be achieved. The presented medium access control protocol options are currently being introduced in European standardization bodies for dedicated short-range communications.