Elec. & comm. to MS in CS ?? does Research paper matters?

I’m a B.tech student pursuing in Electronics and communication course from NIT , I would like to do MS in computer science and want to apply for GRE , but i heard that i can do MS in computer science because I’m from Electronics and communication branch.
so my query is ; can i change my field line from electronic and communication to computer science as i’m very much interested in computer science ???
and also , before applying for GRE i would like to say that i havn’t published any research paper so how much the research paper matters for the admission in good university for computer science program???

Yes, you can. Read this article Graduate school Change of Majors Study in USA

That should not matter much. Admission is a holistic decision and does not just depend on one thing.