A Multi-Dimension Spatial Method for Topology Awareness and Multipath Generating

Abstract

Multipath diversity significantly impacts multipath transmission quality. Enough multipath diversity would minimize the negative influence brought by an individual path, thus improving tolerance capability of network congestion and failure. However, multipath diversity is hard to guarantee on overlay networks because of inaccurate awareness of underlay network and multipath generating methods considering little about underlay diversity. In this paper, we design a multi-dimension spatial method for topology awareness and multipath generating. Analyzing that the complicated underlay networks with multiple autonomous systems reduce the accuracy of network positioning for topology awareness, we decompose the underlay networks into multiple dimensions, namely intra and inter autonomous system dimensions. We generate independent views for each autonomous system and merge views by embedding exchange points. Then, we design some spatial mechanisms to evaluate link diversity and to constrain multipath generating. Based on the multi-dimensional view, multipath generating is conducted in inter and intra autonomous system phases. Experiments demonstrate that the proposed method improves topology awareness accuracy and guarantees multipath diversity better and the transmission quality is improved.

Research on the Load Distribution Strategy to Meet the QoE Requirements for Conversational Real-Time HD Video Service

“…(1) Providing an application layer relay service for conversational real-time HD video service involves many problems such as network resource scheduling, relay path generation, and relay path maintenance. The solutions to these problems have been detailed in our team's other published papers [25,26]. Therefore, in the research work of this paper, we used path generation and measurement information as known input conditions to adjust the real-time transmission load distribution strategy.…”

“…As shown in Figure 2, the function of software defined overlay network is to build a multipath relay transmission service based on the overlay network without changing the existing network architecture. The network node is the relay node supporting the service media forwarding, and the network link is the end-to-end link of the application layer [25,26]. The network element components in this network structure work in the application layer overlay network of the TCP/IP protocol group, and a logical overlay network is built on the underlying bearer network.…”

A QoE Evaluation Method for RT-HDMV Based on Multipath Relay Service

“…Without considering the intersection of the paths, we can set up the session link of RT-HDMV between the service terminal of Alice and Bob with the default route for the network layer [17]. If the access network of the terminal is not in the transmission bottleneck, the multipath relay service can provide application relay paths for the service transmission in addition to the default path [18].…”