A method and system for providing location-based information to a group of mobile user agents. A group of mobile user agents may be identified based at least in part on agent information for each of the mobile user agents in the group. The location information may indicate a location for the mobile user agents, which may be determined using GPS information or GPS assistance information. Location-based information may be determined for the group and provided to the group by broadcasting or multicasting. The mobile user agents may be configured to receive and process the location-based information. The location-based information may comprise GPS assistance information.