In IP access networks that support host mobility, the routing paths between the host and the network may change frequently and rapidly. In some cases, the host may establish certain context transfer candidate services on subnets that are left behind when the host moves. Examples of such services are Authentication, Authorization, and Accounting (AAA), header compression, and Quality of Service (QoS). In order for the host to obtain those services on the new subnet, the host must explicitly re-establish the service by performing the necessary signaling flows from scratch. In some cases, this process would considerably slow the process of establishing the mobile host on the new subnet. An alternative is to transfer information on the existing state associated with these services, or context, to the new subnet, a process called "context transfer". This document discusses the desirability of context transfer for facilitating seamless IP mobility.
|Number of pages||14|
|Publication status||Published - 2002|
|MoE publication type||D4 Published development or research report or study|
|Name||Request for Comments|