Relaying SLT codes based on feedback for communication over multi-hop wireless networks

In multi-hop wireless networks, relay nodes generates new encoded packets by using XOR combinations of cached encoded packets to enhance the performance. This approach has been shown to be efficient. Meanwhile, SLT (Shifted Luby Transfer) codes are capable of adapting the degree distribution according to the feedback to achieve significant performance improvement, which makes it attractive in wireless channels. In this paper, we propose RSLT (Relaying SLT codes) based on feedback for communication over multi-hop wireless networks. Instead of simply generating encoded packets according to RSD (Robust Soliton Distribution), we consider encoded packets cached in relay nodes as native packets and generate new encoded packets according to degree distribution of SLT codes. Additional, we discuss that the number of encoded packets should be generated as few as possible in each relay nodes for saving energy. We describe the design and implementation of RSLT and experimental results show that RSLT achieves good performance compared with other relaying algorithms.