A Fully Distributed P2P Communications Architecture for Network Virtual Environments

Distributed Network Virtual Environments (NVEs) are becoming more and more popular in today´s computing and communications. The scalability of NVEs is an important problem, and faces many challenges. Voronoi-based Overlay Network (VON) has been proposed that promises to maintain the P2P topology in a fully-distributed, low-latency, and message-efficient manner. However, since node heterogeneity in VON does not be considered, communication and message exchange cannot be regulated properly. Additionally, as nodes need to connect to all of their AOI neighbors directly, if there are too many AOI neighbors the transmission size will be too big to transfer in time. Even packet loss can generate in certain some nodes. To these problems, a fully distributed P2P communications architecture for Network Virtual Environments is presented. The architecture calculates optimal AOI-radii according to node ability, and the node crowding may be avoided to a great extent. In constructing multicast tree, node´s fan-out is selected based on node´s degree in theory which can be calculated by node ability. The child node degrees can be adjusted dynamically in system, and the nodes can balance message load independently based node load. The simulation results show that the algorithm gains a greater improvement on multicast efficiency, and achieves better scalability.