The invention provides a method for accessing a quiescent mobile vehicle using
a wireless communication system. A vehicle communication device is placed into
a discontinuous-receive mode. The vehicle communication device is periodically
awakened to a service-ready mode based on the discontinuous-receive mode. A determination
is made whether a short message service communication is waiting to be delivered
during the service-ready mode. A short message service communication is received
in response to the short message service communication determination, and an operation
is performed based on the received short message service communication.