Set the same time stamp to inform decoder which frames belong to image of the same frame. Priority of discard is for N3,N2 ,N1. The packing method has the merits that it just receives packet of N1 you can figure out ordinary quality of the multimedia data in the poor condition of the 3 G wireless network. Receiving of N2 and N3 packet in good condition of the 3 G wireless network can enhance the quality of the image.