Retransmission scheduling for multimedia delivery over wireless home networks

Abstract

The key technique for wireless TVs is to deliver multimedia streams stably over an unstable wireless link. In wireless LANs, a link level retransmission mechanism is used to deal with packet losses due to unstable wireless links. While the retransmission mechanism is effective to hide link level losses to users, it may causes additional delay to other packets which is fatal for real time multimedia traffic such as TV streams. In this paper, we propose a retransmission scheduling scheme to remove the impact of packets. to unstable links. In the proposed scheme, when a link to a node observes bad state, packets to the node are exclusively scheduled from others. Through extensive simulations, we show that the proposed scheme effectively removes unnecessary delay caused by retransmitted packets(1).