| 摘要 |
<p>An arrangement for providing IP mobility for a mobile station (MS). The mobile station (MS) has a care-of-address (COA) for routing data packets when the MS is away from home. The arrangement comprises support nodes, called access nodes (SGSN), and gateway nodes (GGSN), and a foreign agent (FA) having an IP address. In order to save IP addresses and radio resources the foreign agent (FA) is integrated into one of the support nodes (SGSN), and the IP address of, or provided by, the foreign agent (FA) is also used as the mobile station's (MS) care-of-address (COA).</p> |
