An effective redundant coded mesh overlay streaming network

The network dynamics is one of the most important factors that impact the stability of the mesh streaming networks. A streaming multicast mechanism using redundant coding is proposed to alleviate the influence to the transmission performance from dynamic nodes. The media source encodes the stream into several sub-streams with equal length redundantly, and distributes them to different successors. Each node in the network establishes the cooperative relationships with others to get the required sub-streams. A parent selection algorithm with relatively lower complexity is proposed to take full advantage of redundant coding. In case of node's failure, a repairing algorithm of swap-in-turn between different sources of sub-streams is proposed. The algorithm makes the best use of the current parents to ensure high continuity of steaming transmission. Simulation results show that the multicast mechanism can ensure high quality for more than 90% users when the churn rate is below 10; and the codes with higher redundant degree can adapt to more dynamic scenario; and that the codes with redundancy less than 33.3% does not significantly decrease the effective transmission rate when the churn rate is beyond 8.