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IP Mobility Support for IPv4
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2002
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Transparent RoutingMobility ProtocolMobile IpInternet ProtocolMobility ManagementMobile ComputingInternet Of ThingsHome AddressProtocol EnhancementsFuture InternetIp Mobility Support
Mobile nodes are identified by a permanent home address and, when away from home, also by a care‑of address indicating their current attachment point. This document defines protocol enhancements that enable transparent routing of IP datagrams to mobile nodes. The protocol registers the care‑of address with a home agent, which tunnels datagrams to that address and then delivers them to the mobile node.
This document specifies protocol enhancements that allow transparent routing of IP datagrams to mobile nodes in the Internet. Each mobile node is always identified by its home address, regardless of its current point of attachment to the Internet. While situated away from its home, a mobile node is also associated with a care-of address, which provides information about its current point of attachment to the Internet. The protocol provides for registering the care-of address with a home agent. The home agent sends datagrams destined for the mobile node through a tunnel to the care- of address. After arriving at the end of the tunnel, each datagram is then delivered to the mobile node.