Advanced Multimedia and Presence Services using Classical and P2P SIP

Initially, Internet multimedia services focused on either replicating
the existing telephone services or small-group video conferences. While
there remain a number of open issues in achieving feature parity for
open-standard, Internet-based multimedia systems, we can now start to
look beyond this base level of functionality. In this talk, I will
discuss new developments in advanced services, including:

- Service mobility provides the ability to move sessions across both
mobile and stationary devices, splitting and merging sessions to make
best use of locally-available resources.

- Rich presence, which provides a much better indication of the
desirability of communication than the current ring-and-hope model.

- Peer-to-peer SIP, which offers the opportunity to combine largely
infrastructureless multimedia, IM and presence systems with more
traditional server-based environments

- Standards-based application sharing, which fills one of the remaining
large holes in the IETF-based collaboration architecture.

Most of these efforts are being discussed in various IETF working
groups.