Abstract submission versus full research paper submission
The conference link that you have provided (here) is not ranked in recent CORE-2018 database. So, if it is your hard work, you might want to be extra cautious about going ahead with this conference.

Moreover this conference is too generic. I would advise you to go for a specialized conference in your research area. Conferences are not just for publication, they offer way more than just that. You get chance to meet researchers around the globe. If the conference is specialized, then it would be really helpful to get some real feedback and inputs.

Generic conferences do offer some of the benefits, but are not comparable.

Regarding submission to this conference: You could put up your full paper as a preprint in any server and give a link to this shorter version.