| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an IP packet/multicast method which reduces information volume managed by a GGSN, etc., and does not pressing the transmission capac ity of a network. SOLUTION: An MS makes a multicast participation request to an RNC (S31), the same participation request is further made to an SGSN in the case of a new participation request (S33), and the same participation request is further made to the GGSN here, too, in the case of the new participation request (S34-2). When the participation request is not new at the GGSN, the information of a lower node is added to a PDP context held in each multicast group (S34-4).</p> |
