I tend to think that IMS and all-IP will make the telecommunications industry move from an era where the typical technical challenge was to design a specific solution for every problem to a new one where the main difficulty will be to select one solution among many candidates.
In this post I will try to make a panorama of standards and industry trends that may impact this topic in the years to come. In another one, I will express some personal opinions about the way to go.
Presence is a specific example of the user-data-in-SIP-AS approach described above.
So many possibilities... In the next post, I will provide personal opinions on them.