Due to minimum consideration of an actual network topology, the existing peer-to-peer (P2P) overlay networks, such as CAN, Chord, Pastry and Tapestry, will lead to high latency and low efficiency. In TaChord, a topolo...Due to minimum consideration of an actual network topology, the existing peer-to-peer (P2P) overlay networks, such as CAN, Chord, Pastry and Tapestry, will lead to high latency and low efficiency. In TaChord, a topology-aware routing approach in P2P overlays and an improved design in Chord are presented. TaChord and other algorithms are evaluated by physical hops, interdomain-adjusted latency, and aggregate bandwidth used per message. Experimental results demonstrate that TaChord has the drastic improvement in routing performance where average physical hop is half that of chord, and the impact of cache management strategies in the TaChord overlay cannot be neglected.展开更多
With the development of wireless network and the popularity of mobile terminal devices,users can watch videos through both the traditional fixed terminals and smart mobile terminals.However,network resources cannot be...With the development of wireless network and the popularity of mobile terminal devices,users can watch videos through both the traditional fixed terminals and smart mobile terminals.However,network resources cannot be effectively shared between fixed terminals and mobile terminals,which causes a huge waste of resources.To solve this problem,this paper proposes a super peer-based P2P VoD architecture for supporting multiple terminals.In the architecture,resources of various terminals can be shared and server load can be reduced.An architecture was first built based on super peers.And then,a super peer selection algorithm was proposed to select super peers to manage other terminals.Considering the characteristics of the different types of terminals,a corresponding caching mechanism was designed for different terminals to achieve efficient resource sharing.Final,the maintenance of the architecture was discussed.The experiment demonstrates that the architecture is feasible.The architecture can effectively improve the quality and fluency of video playback,and reduce the server load.展开更多
Efficient resource search method has significant impact on the scalability and availability of P2P network. Generally there are two search methods, pure Peer-to-Peer method and central index method. Recently, some sea...Efficient resource search method has significant impact on the scalability and availability of P2P network. Generally there are two search methods, pure Peer-to-Peer method and central index method. Recently, some search methods with super-peer concept are appearing, which are the compromise of those two methods and have favorable scalability and avafiability. In this paper, we compare the advantage and deficiency of these three kinds of search methods, and based on JXTA platform design the super-peer search method.展开更多
文摘Due to minimum consideration of an actual network topology, the existing peer-to-peer (P2P) overlay networks, such as CAN, Chord, Pastry and Tapestry, will lead to high latency and low efficiency. In TaChord, a topology-aware routing approach in P2P overlays and an improved design in Chord are presented. TaChord and other algorithms are evaluated by physical hops, interdomain-adjusted latency, and aggregate bandwidth used per message. Experimental results demonstrate that TaChord has the drastic improvement in routing performance where average physical hop is half that of chord, and the impact of cache management strategies in the TaChord overlay cannot be neglected.
基金the National Natural Science Foundation(No.61762029,No.U1811264,No.61662012)Guangxi Natural Science Foundation(No.2016GXNSFAA380193)+1 种基金Guangxi Key Laboratory of Trusted Software(No.kx201726)and the Foundation of Key Laboratory of Cognitive Radio and Information Processing,Ministry of Education(No.CRKL150105)。
文摘With the development of wireless network and the popularity of mobile terminal devices,users can watch videos through both the traditional fixed terminals and smart mobile terminals.However,network resources cannot be effectively shared between fixed terminals and mobile terminals,which causes a huge waste of resources.To solve this problem,this paper proposes a super peer-based P2P VoD architecture for supporting multiple terminals.In the architecture,resources of various terminals can be shared and server load can be reduced.An architecture was first built based on super peers.And then,a super peer selection algorithm was proposed to select super peers to manage other terminals.Considering the characteristics of the different types of terminals,a corresponding caching mechanism was designed for different terminals to achieve efficient resource sharing.Final,the maintenance of the architecture was discussed.The experiment demonstrates that the architecture is feasible.The architecture can effectively improve the quality and fluency of video playback,and reduce the server load.
文摘Efficient resource search method has significant impact on the scalability and availability of P2P network. Generally there are two search methods, pure Peer-to-Peer method and central index method. Recently, some search methods with super-peer concept are appearing, which are the compromise of those two methods and have favorable scalability and avafiability. In this paper, we compare the advantage and deficiency of these three kinds of search methods, and based on JXTA platform design the super-peer search method.
