You could buy some call options on the USD/INR. That way if the dollar goes up, you'll make the difference, and if the dollar goes down, then you'll lose the premium you paid.
I found some details on USD/INR options here
Looks like the furthest out you can go is 3 months. Note they're european style options, so they can only be exercised on the expiration date (as opposed to american style, which can be exercised at any time up to the expiration date).
Alternatively, you could buy into some futures contracts for the USD/INR. Those go out to 12 months. With futures if the dollar goes up, you get the difference, if the dollar goes down, you pay the difference.
I'd say if you were going to do something like this, stick with the options, since the most you could lose there is the premium you put up for the option contracts. With futures, if it suddenly moved against you you could find yourself with huge losses.
Note that playing in the futures and options markets are an easy way to get burned -- it's not for the faint of heart.