PDP context and IPv4/6

[Bilajbegovic Damir <damir.bilajbegovic@siemens.com>]

Hi,
    I am working on IMS, on transition of IPv4 to IPv6, and I need help.
    Where can I find explained process of activation PDP context, depending
on IP version.
    If you know some file or link, I would be grateful. 
         Thanks in advance
                               Damir Bilajbegovic