This genre has not really been explored by Indian authors, has it? Even the Fantasy genre for that matter. Most books of the genres end up transforming into myth-fics. Authors need to move beyond the history and mythology and test new waters.
I've hardly read any sci-fi books by Indian authors, coming to think of it... Especially if you don't count Satyajit Ray's short stories. It'd be a good idea to look up a few when I get time.
Hey. I've uploaded an anthology of selected science fiction stories by Indian authors, edited by Bal Phondke (https://www.craxme.com/thread-9869-1-1.html). It's not groundbreaking or anything but some of the stories are quite interesting. Let me know how you find it.