Reliable and Efficient Multicast Protocol for MPEG - 4 Transmissions over IEEE 802.11n

© 2015, IJCSMC All Rights Reserved 344 Abstract— Multicasting is the communication between single sender and multiple receivers. The legacy multicasting over the WLAN standard IEEE 802.11 has two problemspoor reliability and low transmission rates. Existing multicast protocols for 802.11 are not so efficient when they are used along with the frame aggregation of IEEE 802.11n WLANS. Therefore we propose a new multicast protocol for WLAN standard IEEE 802.11n, named as Reliable and Efficient Multicast Protocol (REMP), which selectively retransmits the errored multicast frames. In addition, we propose the extension by transmitting MPEG-4 video transmission over IEEE 802.11n. In our proposed approach, (1) P and B frames will be discarded by the MPEG 4 decoder at the receiver if the corresponding I frame is lost; (2) the individual MPEG-4 frames are prioritized at the receiver in such a way that I frames have a higher priority than P frames, which have higher priority than B frames.