I am not sure why he was referrering to a document called Dyn[17] (nor do I have any idea what that document is) because the ANT commands are listed in ANT Message Protocol and Usage in chapter 9.
I believe that is a reference to the bibliography (Literaturverzeichnis in the thesis) entry :
[17] ANT Message Protocol and Usage. Dynastream Innovations Inc., Rev 4.1 edition, July 2007.