http://www.csun.edu/~andrzej/COMP529-S05/papers/Mesh%20Networks%20Survey.pdf

Wireless mesh networks: a survey

Named Data Networking (NDN) is one of five projects funded by the U.S. National Science Foundation under its Future Internet Architecture Program. NDN has its roots in an earlier project, Content-Centric Networking (CCN), which Van Jacobson first publicly presented in 2006. The NDN project investigates Jacobson's proposed evolution from today's host-centric network architecture (IP) to a data-centric network architecture (NDN). This conceptually simple shift has far-reaching implications for how we design, develop, deploy, and use networks and applications. We describe the motivation and vision of this new architecture, and its basic components and operations. We also provide a snapshot of its current design, development status, and research challenges. More information about the project, including prototype implementations, publications, and annual reports, is available on named-data.net.

/pdf/named-data-networking-4kzv69blab.pdf

Named data networking

Home PURPOSE OF THE CENTER: To develop the center to address state-of-the-art research, create innovating educational programs, and support technology transfers using commercially viable results to assist the Army Research Laboratory to develop the next generation Future Combat System in the telecommunications sector that assures prevention of perceived threats, and Non Line of Sight/Beyond Line of Sight lethal support.

How to… home page

Network function virtualization (NFV) has drawn significant attention from both industry and academia as an important shift in telecommunication service provisioning. By decoupling network functions (NFs) from the physical devices on which they run, NFV has the potential to lead to significant reductions in operating expenses (OPEX) and capital expenses (CAPEX) and facilitate the deployment of new services with increased agility and faster time-to-value. The NFV paradigm is still in its infancy and there is a large spectrum of opportunities for the research community to develop new architectures, systems and applications, and to evaluate alternatives and trade-offs in developing technologies for its successful deployment. In this paper, after discussing NFV and its relationship with complementary fields of software defined networking (SDN) and cloud computing, we survey the state-of-the-art in NFV, and identify promising research directions in this area. We also overview key NFV projects, standardization efforts, early implementations, use cases, and commercial products.

/pdf/network-function-virtualization-state-of-the-art-and-29gg3feprt.pdf

Network Function Virtualization: State-of-the-Art and Research Challenges

The current Internet architecture was founded upon a host-centric communication model, which was appropriate for coping with the needs of the early Internet users. Internet usage has evolved however, with most users mainly interested in accessing (vast amounts of) information, irrespective of its physical location. This paradigm shift in the usage model of the Internet, along with the pressing needs for, among others, better security and mobility support, has led researchers into considering a radical change to the Internet architecture. In this direction, we have witnessed many research efforts investigating Information-Centric Networking (ICN) as a foundation upon which the Future Internet can be built. Our main aims in this survey are: (a) to identify the core functionalities of ICN architectures, (b) to describe the key ICN proposals in a tutorial manner, highlighting the similarities and differences among them with respect to those core functionalities, and (c) to identify the key weaknesses of ICN proposals and to outline the main unresolved research challenges in this area of networking research.

A Survey of Information-Centric Networking Research

One of the most discussed features offered by Information-centric Networking (ICN) architectures is the ability to support packet-level caching at every node in the network. By individually naming each packet, ICN allows routers to turn their queueing buffers into packet caches, thus exploiting the network's existing storage resources. However, the performance of packet caching at commodity routers is restricted by the small capacity of their SRAM, which holds the index for the packets stored at the, slower, DRAM. We therefore propose Object-oriented Packet Caching (OPC), a novel caching scheme that overcomes the SRAM bottleneck, by combining object-level indexing in the SRAM with packet-level storage in the DRAM. We implemented OPC and experimentally evaluated it over various cache placement policies, showing that it can enhance the impact of ICN packet-level caching, reducing both network and server load.

Object-oriented Packet Caching for ICN

For network music performance (NMP), end-to-end delay is the most critical factor affecting the quality of experience (QoE) of the musicians, as longer delays prevent the musicians from synchronizing. To analyze the sensitivity of QoE to delay, we performed a controlled NMP experiment, where 11 pairs of musicians performed under a wide range of delays. The analysis of the QoE questionnaires answered by the participants produced results with wide variances, making the extraction of solid conclusions quite difficult. In this paper, we complement the subjective study with an analysis of the performance tempo of the NMP sessions. Specifically, we used signal processing techniques to analyze the audio recordings of the experiments, to recover the performance tempo of the musicians, assess its evolution during each session, and correlate it with the underlying delay. The results of the analysis indicate that musicians in real NMP settings are more tolerant to delay than previously thought, managing to reach and maintain a steady tempo even with one-way delays of 40 ms. We also study how the performance tempo is related to delay, finding that the exact relationship between the two depends on the musicians. 

/pdf/assessing-the-effects-of-delay-to-nmp-via-audio-analysis-2obpqqo0.pdf

Assessing the Effects of Delay to NMP via Audio Analysis

We present alternative designs for efficiently supporting multicast for mobile hosts on the Internet. Methods for separately supporting multicasting and mobility along with their possible interactions are briefly described, and then various solutions to the combined problem are explored. We examine three different multicast delivery mechanisms and compare them based on their efficiency and impact on host protocol software.

Content-Centric Routing is the cornerstone of the standardization efforts related to Named Data Networking (NDN). It enables advanced communication paradigms and facilitates content replication and caching, by allowing routers to exchange information and perform forwarding based on content item identifiers rather than location identifiers (e.g., network addresses). However, since content may originate from multiple locations, malicious nodes can advertise content that they do not host, effectively hijacking the corresponding content name prefixes. In this paper, we leverage two recent W3C recommendations, Decentralized Identifiers (DIDs) and Verifiable Credentials (VCs), to enable routing nodes to independently check whether a content advertisement was generated by an authorized node, in a fully decentralized manner that does not rely on trusted third parties. We implement and evaluate our solution in a system where advertisements are verified by the content routers at the edge of the network, showing that it prevents fake routing advertisements with minimal overhead.

Authentication and Authorization for Content-Centric Routing using W3C DIDs and VCs

The Radio Link Control (RLC) protocol, used in Universal Mobile Telecommunication System (UMTS) networks, is one of the most advanced and complex link layer protocols Among its notable features are the absence of retransmission timers, which makes it tolerant to contention for the link, and the ability to abandon persistently lost frames, which makes it suitable for reliable transport layers In order to assess whether it makes sense to use RLC with non-UMTS wireless links, especially in the face of the enhanced error recovery offered by TCP with the Selective Acknowledgment (SACK) option, we implemented it in the ns-2 simulator and measured the throughput achieved by File Transfer and Web Browsing over RLC, either with or without contention from a Media Distribution application While we found that RLC adapts well to the available bandwidth, providing considerable performance gains with random losses, with bursty losses RLC hardly improved upon TCP SACK

/pdf/rlc-protocol-performance-over-tcp-sack-39io0d7ucw.pdf

George Xylomenos

Papers

Object-oriented Packet Caching for ICN

Assessing the Effects of Delay to NMP via Audio Analysis

Authentication and Authorization for Content-Centric Routing using W3C DIDs and VCs

RLC protocol performance over TCP SACK