ER: Efficient Retransmission Scheme for Wireless LANs
Wireless LANs (WLANs) have been deployed at a remarkable rate at university campuses, office buildings, airports, hotels, and malls. Providing efficient and reliable wireless communications is challenging due to inherent lossy wireless medium and imperfect packet scheduling that results in packet collisions. In this paper, the authors develop an Efficient Retransmission scheme (ER) for wireless LANs. Instead of retransmitting the lost packets in their original forms, ER codes packets lost at different destinations and uses a single retransmission to potentially recover multiple packet losses. They develop a simple and practical protocol to realize the idea and implement it in both simulation and testbed, and the results demonstrate the effectiveness of this approach.