A multicast mechanism for mobile networks

This letter proposes a multicast table approach to support GSM/UMTS multicast that minimizes the paging cost. The implementation and execution of the multicast tables are very efficient. The costs for updating these tables can be ignored compared with the costs of standard location update procedures. Furthermore, our mechanism can be implemented within the mobility databases without modifying the standard location update messages. We show that our mechanism always outperforms the existing GSM/UMTS multicast mechanisms.