Mobility Management using Proxy Mobile IPv4
Mobile IPv4 is a standard mobility protocol that enables IPv4 device to roam between networks. The mobile device has the Mobile IP function to signal its location to the routing anchor, known as the Home Agent. However, there are many IPv4 devices without such capability due to various reasons. This document describes a solution based on Proxy Mobile IPv4, which enables some other entity to provide mobility support on behalf of an unaltered and mobility- unaware IPv4 device.