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Multipath TCP is an extension to TCP protocol that allows a single connection to be split across multiple paths. MPTCP overcomes few limitations of TCP thereby offering added benefits like increased throughput and network resource utilization and resilience to possible link failures. Different data paths over the network face different end-to-end path delay. The performance of MPTCP is affected not...
Content distribution schemes for Video on Demand (VoD) systems, based on the peer-to-peer (P2P) technology, have attracted more and more attention. Recently, people mainly focus on the latency performance, security, interaction, scalability, and so on. We propose a new network topology model — Similarity Crossed Cube(S-CQ for short), which combines with the feature of crossed cube and establishes...
MPLS-Traffic Engineering (MPLS-TE) provides many recovery mechanisms such as rerouting and protection. Existing one-to-one backup and path-based backup schemes are not resource efficient. We propose Common Protection Path (CPP), a novel protection scheme which selects a common protection path for traffic demands having the same ingress and egress routers. CPP also factors in path failure probability...
Video-on-demand (VoD) is a rapidly growing method for viewing and sharing video content over the Internet. However, video on demand consumes a significant amount of bandwidth, forcing content publishers and content delivery networks to examine approaches such as the use of peer-to-peer (P2P) technologies to assist in video distribution. We study the performance impact of a peer localization strategy...
In this paper, we present design and implementation aspects of a network resource provisioning module proposed for the Polish Initiative of Future Internet called System IIP (being currently one of major European projects aimed at designing the Internet of the Future). In particular, we introduce novel LP optimization models of network resource provisioning designed to minimize the resource consumption,...
In the view of the large scale and increasing kinds of service of space information networks, a service- oriented topology control algorithm is proposed. According to demands of existing service, the topology of network is divided into several logical sub-topologies, on which construct the corresponding topology. Taking the communication pattern as an example, the augmentation-based approach is adopted...
We present experimental results for performance of the 2D hypermesh NoC topology, realized with the Altera Family of FPGAs. Hypermeshes are based on the concept of hypergraphs, which consist of a set of nodes and a set of hyper-edges, where the hyper-edges represent low-latency distributed switches. In a 2D hypermesh, the nodes in each row or column are members of a hyperedge, where packets can traverse...
Experimentation is typically the last step before launching a network application in the wild. However, it is often difficult to gather enough hardware resources for experimenting with a reasonably sized overlay application inside a controlled environment. Virtualization is thus a handy technique for creating such an experimentation testbed. We propose a tool called NEmu designed to create virtual...
On real-time video streaming, the distribution with multi-tree Application Level Multicast (ALM) is effective in terms of delay and jitter. In constructing multi-tree networks, a joining node selects counterpart nodes based on their performance or bandwidth capacity and they are connected each other. However, tree-based ALM has the overhead of reconstructing the tree topology when any node leaves...
This paper proposes a GPON-based transmission hierarchy (GTH) for mesh network. An OPNET testbed is constructed to test the performance of GTH on supporting metro aggregation service. From this testbed, the performance of the network and the terminals are got, which will definitely provide some references for optimizing GTH's usage in mesh network.
Flash data dissemination transmits time-critical data to distributed receivers in a timely manner, which is widely used in many mission-critical applications. However, existing flash data dissemination approaches fail to guarantee the timely transmission due to the unpredictability of the dissemination process. Overlay routing has been widely used as an efficient routing primitive for providing better...
Despite the many proposals for data center network (DCN) architectures, designing a DCN remains challenging. DCN design is especially difficult when expanding an existing network, because traditional DCN design places strict constraints on the topology (e.g., a fat-tree). Recent advances in routing protocols allow data center servers to fully utilize arbitrary networks, so there is no need to require...
Overlay networking has emerged as an alternative solution to solve many problems related to massive information distribution and processing tasks by providing enhanced services in application layer. For instance, overlay networks can improve data dissemination in P2P file sharing overlays and Content Distribution Networks (CDNs) in which delay is considered as a critical performance metric. A viable...
The selection of a path in a network from one node to another is performed by a routing protocol, often using the shortest path approach. However, it has been shown that in wireless networks, the shortest path approach tends to select paths with wireless links that are only intermittently available and often unstable, resulting in extensive loss of packets in the data delivery process. Instead of...
With the emergence of bandwidth intensive applications new methodologies need to be developed for improvement of network blocking performance, without supplying extra resources in dynamic wavelength-division-multiplexing (WDM) networks. Rerouting is one among the viable and cost-effective solutions to reduce the blocking probability (BP) of optical WDM networks. Similarly, set-up delay tolerance,...
It is known fact that modern IP networks are adopting eXplicit Control Protocol (XCP) as the de-facto standard. In the implementation of XCP, the XCP sender outputs packets in bursts such that all the packets inside the congestion window are outputted without any interval between them. The burst not only increases the queuing delay, but also makes XCP with heterogeneous delays to be unstable. In the...
When designing routing protocols for space-based networks, we must take into consideration the unique characteristics of such networks. Since space-based networks are inherently sparse with constrained resources, one needs to design smart routing algorithms that use the resources efficiently to maximize network performance. In Space Exploration Missions, the trajectories and orbits of spacecraft are...
In the past decade, significant research has been carried out for realizing intelligent network routing using advertisement, position and near-optimum node selection schemes. In this paper, a grade-based two-level node selection method along with genetic algorithm (GA) is proposed for realizing an efficient routing scheme. This method assumes that the nodes are intelligent and that there exists a...
As the dominant Internet application, peer-to-peer (P2P) file sharing systems account for the major portion of Internet traffic, posing significant burden on ISPs. Many ISPs have attempted to discriminate against P2P traffic, making it important to alleviate such severe conflict. In this paper, we propose a novel architecture called iDTT that aims to use the underutilized off-peak time network capacity...
Major challenge for TCP is to keep up the new and modern generation in communications networks such as networks with large bandwidth and long delay because when TCP applies on next generation networks will suffer from degradation in performance. The reason behind this shortcoming in performance is due to the congestion control mechanisms supported by TCP variants where these mechanisms depending on...
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