Patent ID: 7415243

Claim:
A method for receiving data from a satellite radio network, comprising: receiving a datagram broadcast via a satellite radio network utilizing a receiver in a vehicle; wherein the datagram has a header portion that includes a first group identifier identifying a group of one or more receivers in the satellite radio network to which the datagram is directed, and an area identifier identifying a geographic area in which the datagram is directed; obtaining information about a geographic location of the recipient receiver utilizing a global positioning system receiver coupled to the recipient receiver; wherein the receiver has a locally stored individual identifier and a locally stored group identifier associated therewith; comparing the group identifier and the area identifier of the datagram with the locally stored group identifier and obtained geographic location information of the recipient receiver to determine if the recipient receiver is an intended recipient of the datagram; wherein the datagram has a body portion that includes a set of one or more individual identifiers of receivers in the satellite radio network and an instruction for replacing the locally stored group identifiers of the receivers identified by the set of one or more individual identifiers with a second group identifier; determining whether the locally stored individual identifier of the recipient receiver matches at least one individual identifier in the set of one or more individual identifiers of the datagram by comparing the locally stored individual identifier of the recipient receiver to the set of one or more individual identifiers of the datagram; and replacing the locally stored group identifier of the recipient receiver with the second group identifier of the datagram if a match is found.