| 摘要 |
<p>The number of required GWs is reduced to suppress the number of facilities by storing MS information on an M2M connection in an external device, and cooperating with the GWs such as mobile GWs in a mobile system in which the M2M connection and a connection other than the M2M connection are mixed together. When an MS migrates to an idle state, the MS stores the MS information in the external device once, and deletes information from an ASN-GW. When the MS migrates from the idle state to an active state, the ASN-GW again draws the MS information from the external device, and again stores the MS information within the device, to thereby enable a communication. If a resource of the active state is short within the device, a migration from the idle state to the active state is enabled with the use of another ASN-GW.</p> |
