Self-Adaptive Network Algorithm Of IPTV System

Through study in-depth on P2P IPTV system and ALM IPTV system,a self-adaptive network model(SANM)of IPTV system based on P2P and ALM is proposed,which supports the two technologies at the same time.The structure of SANM is two-tier structure,with the application layer multicast tree as upper tier and the P2P network as lower tier.The super peer of the P2P network is the leafage peer of the application layer multicast tree.SANM used the real time advantage of P2P,as well as high reliability of ALM.The paper quotes Hybrid Search P2P algorithm(HS algorithm)and Single Source ALM algorithm(SS algorithm)in achieving the SANM.Based on the two slgorthms above,self-adaptive network algorithm(SA Algorithm)of IPTV system based on P2P and ALM is proposed.SA algorithm makes each client in the network can take full advantages of P2P and ALM.The client can switch the role between P2P and ALM according to network conditions at any time.The result of simulated test shows that the SA algorithm proposed in this paper can greatly improve the network performance, including reduction of the data transmission delay in low-bandwidth network link.