The field is diverse and many. I would suggest that you apply your strengths, e.g. Java Programming to write a mobile application to solve a computer science related problem.

I think for M Tech Thesis you should first consult your supervisor to choose a problem because the supervisor will guide you. Find out his/her fields of interest and try to be confined within those fields.

Resource provisioning problem in distributed computing/Grid computing  with the help of some nature inspired algorithm may be a good topic  for M.Tech Thesis according to your area of interest. (In my opinion!)

Hi Guneet Walia,

i think you identify a real problem, then its share and discuses with your supervisor. Find out her/his fields of interest and try to be selected a topic within those fields.

Your Expertise include Computer Network, so you choose any one of these next generation computing technologies 

IoT

VANET (Network Layer and Transport Layer)

CRN  (Network Layer and Transport Layer)

MESH  (Network Layer and Transport Layer)

WIMAX  (Network Layer and Transport Layer)

Prefer by layers ,  (Network Layer and Transport Layer) -CSE background

(Physical and MAC layer) - ECE background