P-CSCF fast handoff for IMS/MMS architecture

摘要

A mechanism by which handoff delay can be minimized while not compromising the IMS/MMD security and also protecting the media if required by certain applications is presented. One proactive method includes proactive authentication. Another proactive method includes proactive security association, such as transferring SA keys from old proxy to new proxy, or transferring keys through serving signal entities. Reactive methods include transferring SA keys from old proxy to new proxy, using either push or pull technology. Other reactive methods include transferring keys through serving signal entities using either push or pull technology.

主权项

1. A method for handoff in IMS/MMD architecture of a mobile node in a first network, said mobile node associated with a first protocol component in said first network, said first protocol component associated with a second protocol component in said first network, said mobile node moving from said first network to a second network, said method comprising:
preparing to move said mobile node to said second network by transferring context information from said first protocol component to a third protocol component in said second network while said mobile node is in said first network; and establishing a security association between said mobile node and said third protocol component using said context information while said mobile node is in said first network, thereby reducing handoff delay and packet loss for said mobile node.