I apologize for the newbie question. . I've booked an economy award ticket using US Airways miles and will be flying Washington-Narita-Beijing next July. Am I elligible for premium economy seating since I have an award ticket? Can I get assigned this seating ahead of time by calling ANA--or do I just have to take my chances on the day of travel? Anything I can do to increase my chances of getting premium economy seating?

Thanks in advance for any insights!