The problem solved in this paper is to design a video streaming protocol which is accomplished by the application layer multicast in the WLAN. This protocol, WVALM, divides the whole video streaming into small blocks, and achieves the requirement of streaming multicast by multicasting those small blocks. The receiver and the sender use streaming window and retransmit window respectively to coordinate their relationship. Through experiment test, WVALM achieves the original object and could work well in the wireless environment.
