Let's hope that U.S. SIGINT assets catch them and pass the info to Indians.
I think that this will be a low-tech fight — for the PLA. They will not be using their modernized units , for this is mountain warfare (understatement). This will be a light-infantry fight. Mortars, machine guns and light-howitzers. It’s difficult to even use helicopters at those altitudes.
I expect the PLA will use a lot of discipline on the signals front. They are well-aware that anything they broadcast will be vacuumed up by the NSA.