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Advanced Metering Infrastructure (AMI) forms a communication network for the collection of power data from smart meters in Smart Grid. As the communication within an AMI needs to be secure, key management becomes an issue due to overhead and limited resources. While using public-keys eliminate some of the overhead of key management, there is still challenges regarding certificates that store and certify...
Named Data Networking (NDN) is a promising Future Internet architecture to support efficient content distribution. Specifically, P2P may gain benefits from NDN, as NDN inherently provides a flexible forwarding plane for multi-source and multi-path communications. Existing studies in this area have proposed solutions, but these are adversely affected by link latency. This leads to illogical resource...
Video on Demand (VoD) streaming makes up an increasing portion of global IP traffic. Traditionally, data is served by content providers directly, putting a huge network load on the servers. We propose using our WebRTC-based protocols WebPeer and CodedWebPeer to create a P2P-assisted VoD streaming system with network coding. We introduce two metrics: network health to measure overall data saturation...
Motivated by the increasing trend of storing data for web applications in fast NoSQL systems, in this paper, we experiment with the leading NoSQL datastore — Cassandra — and a latest generation re-design of Cassandra — ScyllaDB — meant to deliver bleeding-edge performance on modern multicore machines. We evaluate the scalability claim of ScyllaDB, in terms of the number of clients, and provide diagnostic...
In recent years, the fifth revision of the HyperText Markup Language standard (HTML5) has promoted the porting of traditional desktop applications to the Web, thus allowing the rise of Rich Internet Applications (RIAs). Additionally, the progressive support to Web Real-Time Communication (WebRTC) standard in modern browsers for real-time communications is accelerating this process, enabling the migration...
Big data revolution has created an unprecedented demand for intelligent data management solutions on a large scale. While data management has traditionally been used as a synonym for relational data processing, in recent years a new group popularly known as NoSQL databases have emerged as a competitive alternative. There is a pressing need to gain greater understanding of the characteristics of modern...
Distributed key value storage systems are widely used by many popular networking corporations. Nevertheless, server power consumption has become a growing concern for key value storage system designers since the power consumption of servers contributes substantially to a data center's power bills. In this paper, we propose GreenCHT, a power-proportional replication scheme for consistent hashing based...
Several approaches to reduce the power consumption of data enters have been described in the literature, most of which aim to improve energy efficiency by trading off performance for reducing power consumption. However, these approaches do not always provide means for administrators and users to specify how they want to explore such trade-offs. This work provides techniques for assigning jobs to distributed...
Within the Future Internet, a new trend is foreseen with the creation of overlay networks composed of residential gateways (i.e. Home-Box), leveraging their storage and upload capacity in order to achieve scalable and cost-efficient content distribution. In this paper, we highlight an architecture of such a home-box overlay for Video On Demand (VOD) services, in cooperation with a network-aware request...
Content replication and placement is an effective technique to improve data availability and enhancing network performance. This area received attention in Content Delivery Networks (CDNs), but is less explored by the research community in Wireless Mesh Networks (WMNs). A number of replica placement algorithms were specifically designed for CDNs, but they do not consider the special features of wireless...
Networks are subject to attacks from malicious sources. Sending the data securely over the network is one of the most tedious processes. A peer-to-peer (P2P) network is a type of decentralized and distributed network architecture in which individual nodes in the network act as both servers and clients of resources. Peer to peer systems are incredibly flexible and can be used for wide range of functions...
This paper addresses the problem of maintaining replicated data in large scale P2P systems. Although this topic has been extensively studied in the literature, to maintain replicated data in this setting, in an efficient manner, still remains a significant challenge. This paper proposes novel policies to address this problem and evaluates their performance against different criteria, such as monitoring...
The Internet topology at the autonomous system (AS) level has been under heavy investigation in recent years. Previous studies have shown that the Internet AS topology exhibits a power-law node degree distribution and a small-world structure. With the proliferation of peering links and IXPs between ASes, the traditional hierarchical Internet has been more flattened. In this paper, we conducted a graph-theoretic...
In this paper, we propose a hybrid Peer-to-Peer (P2P) architecture for Content Delivery Networks (CDNs). The basic idea of the proposed method is to prepare a P2P overlay for each Autonomous System (AS) and to map nodes to the P2P overlays by referring to the information maintained by the DNS server deployed by the system. The performance of the proposed scheme is evaluated by simulation. The result...
In P2P (Peer-to-Peer) VoD (Video-on-Demand) systems, one of the key problems is cache replication. However, with the large scale P2P VoD systems deployed, people study on the log of these systems and gradually realize that the strategy which caches videos proportionally to their popularities is not optimal, especially for cold resources. In simulation, we show that cold videos produce the majority...
With the rapid increase of traffic on the web, content caching reduces user-perceived latency as well as the transmission of redundant traffic on the network. In this study, we analyze the gains of HTTP content caching at the location of SGW in an LTE Wireless network. High cache hit ratio can be achieved if the proxy server caches only those contents that are guaranteed of significant revisits. In...
Recent technical progress on the Internet and virtual reality has enabled the proliferation of distributed virtual environments (DVEs). In a DVE, high-resolution 3D contents may generate huge data, and the peer-to-peer (P2P) streaming takes advantages to carry these huge traffic in a cost-effective manner. In this P2P paradigm, peers can cache and share DVE data cooperatively to reduce server workload...
The peer-to-peer networking concept has revolutionized the cost structure of Internet data dissemination by making large scale content delivery with low server cost feasible. In a peer-to-peer network, the total upload capacity increases with the number of down loaders instead of staying constant as in a client-server architecture, making it highly scalable. Despite of its importance, the problem...
The goal of this paper is to minimize service disruption, a unique phenomenon in peer-to-peer (P2P) streaming system and the major contributing factor to degrade user experience. In order to improve its streaming quality and stability, a P2P system should select peers with abundant bandwidth resource and prospect longevity as the parents of other peers. Towards this end, we propose PRW (peer resilient...
Multiplayer Online Game has been extremely popular, in which peer-to-peer technology has been introduced to help with the scaling. This paper presents a measurement study on a P2P-based MOG supporting system, called PKTown, which has been fully deployed over the CERNET. By leveraging a large set of traces obtained recently over a 4-month period, we study the benefit of P2P architecture applying to...
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