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arXiv 2019年

作者： Saltarin, Jonnahtan Braun, Torsten Bourtsoulatze, Eirina Thomos, Nikolaos University of Bern Bern Switzerland Imperial College London London United Kingdom University of Essex Colchester United Kingdom

In this paper, we propose PopNetCod, a popularity-based caching policy for network coding enabled Named Data networking. PopNetCod is a distributed caching policy, in which each router measures the local popularity of the content objects by analyzing the requests that it receives. It then uses this information to decide which Data packets to cache or evict from its content store. Since network coding is used, partial caching of content objects is supported, which facilitates the management of the content store. The routers decide the Data packets that they cache or evict in an online manner when they receive requests for Data packets. This allows the most popular Data packets to be cached closer to the network edges. The evaluation of PopNetCod shows an improved cache-hit rate compared to the widely used Leave Copy Everywhere placement policy and the Least Recently Used eviction policy. The improved cache-hit rate helps the clients to achieve higher goodput, while it also reduces the load on the source servers. Copyright © 2019, The Authors. All rights reserved.

关键词： network coding

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Multi-technology vs Single-technology Architecture for network coding in VANETs

Multi-technology vs Single-technology Architecture for Netwo...

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IEEE Symposium on Computers and Communications (IEEE ISCC)

作者： Gomes, Christian Luis, Miguel Sargento, Susana Zuquete, Andre Lopes, Rui Univ Aveiro Aveiro Portugal Inst Telecomunicacoes Aveiro Portugal Univ Aveiro DETI Aveiro Portugal Univ Aveiro IEETA Aveiro Portugal

ISBN: (纸本)9781538669501

The growing interest in vehicular networks (VANETs) is encouraging its deployment in new environments, for both safety applications and to provide Internet to its users. Vehicles can connect to others, or to the infrastructure, providing an Internet connection. The communication equipment placed inside the vehicles may have multiple network interfaces of diverse technologies, such as IEEE 802.11p/WAVE, IEEE 802.11a/g/n (Wi-Fi) and cellular. For this purpose, multihoming and network coding can be used to provide high bandwidth and reliability to these services, reducing packet losses due to poor wireless signal quality, therefore improving the final Quality-of-Service (QoS). This work evaluates the impact of a Systematic network coding (SNC) approach in multihoming when the coding is applied over traffic incoming from multiple technologies, or from a single technology, depending on the entity responsible for the encoding process. The multi-technology architecture proposed in this work will be evaluated using different coding configurations (generation and buffer sizes) and by analyzing its impact on the packet loss recovery ratio. The comparative results show that the multi-technology approach has a better delivery ratio when compared to the single-technology, despite the small impact on the packet delay.

关键词： network coding Decoding Encoding Computer architecture Packet loss Reliability

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Cross-Layer Offloading in Fog-RANs using Device Cooperation and network coding

Cross-Layer Offloading in Fog-RANs using Device Cooperation ...

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IEEE Global Telecommunications Conference (GC Wkshps)

作者： Kaneva, Kameliya Aboutorab, Neda Sorour, Sameh Reed, Mark C. Univ New South Wales Sch Engn & Informat Technol Sydney NSW Australia Univ Idaho Dept Elect & Comp Engn Moscow ID 83843 USA

ISBN: (纸本)9781538649206

This paper studies the Fog Radio Access networks (F-RANs) where smart user devices, called F-UEs, can communicate and cooperate with each other in order to reduce the load on the central baseband processing unit (BBU) and consequently, increase the capacity of the system. Here, we propose a cross-layer approach to offload the BBU taking into account each F-UE's download rates which represent the actual physical conditions of its channel. The algorithm's second priority is also to reduce the transmission times between the F-UEs. The BBU and F-UE devices in our system utilize network coding (NC) so that they can target more receivers with one coded transmission and thus, communicate more efficiently. Initially, we formulate the problem of cross-layer BBU offloading as an optimization problem, model it onto an NC conflict graph, and prove its NP-hardness. Then, a heuristic algorithm is proposed to efficiently schedule the coded transmissions between all devices in the network so that the BBU transmits in minimum time. Simulation results show that our proposed algorithm achieves not only better physical offloading of the BBU compared to the upper-layer (i.e., non cross-layer) scheme but also reduces the energy consumption of the F-UEs.

关键词： network coding Receivers Schedules Radio transmitters Baseband Libraries Optimization

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Softwarization of network coding Functions and Logical Mapping to SDN

Softwarization of Network Coding Functions and Logical Mappi...

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International Symposium on networks, Computers and Communications (ISNCC)

作者： Vazquez-Castro, M. A. Contreras-Murillo, L. M. Autonomous Univ Barcelona Sch Engn Bellaterra 08193 Spain Telefon I D Global CTIO Unit Transport IP & Interconnect Networks Technol & Planning Barcelona Spain

ISBN: (纸本)9781538637784

It is becoming clear that softwarization and virtualization of networking entail fundamental changes in how networking industry can control or troubleshoot traffic flows or enforce network-wide policies. Also application developers bystander major changes, with new opportunities for fast development of innovative applications and services. network functions (NFs) are key building blocks to realise such potential. Indeed, NFs are currently subject of great development by diverse vendors for a large range of applications beyond traditional well known networking functionalities. Such new capabilities may benefit from flexible and scalable design as opposite to current blackbox view of NFs. In this paper we propose one such novel NF with flexible and scalable design. Our NF exploits the capabilities of the network coding (NC) concept to improve different metrics of service performance, hence resulting in a NC service that can be offered either to external customers or used as internal service by the network provider. Our main contribution is three-fold. First, we justify our approach of internal logical visibility of network coding functions (NCFs), which allows proprietary while interoperable NCFs. Second, we propose the modelling of NCFs internal logic in terms of their software functional architecture. Finally, we show that our functional logic naturally maps to softwarized network architectures, which in turn facilitates NCFs virtualization. We also discuss the applicability of our architectures to representative conceptual scenarios and identify next steps.

关键词： Encoding network coding Computer architecture Software Task analysis Decoding Noise measurement

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Secure physical layer network coding versus secure network coding

Secure physical layer network coding versus secure network c...

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IEEE Information Theory Workshop (ITW)

作者： Hayashi, Masahito Nagoya Univ Grad Sch Math Nagoya Aichi Japan Southern Univ Sci & Technol Shenzhen Inst Quantum Sci & Engn Shenzhen Peoples R China Natl Univ Singapore Ctr Quantum Technol Singapore Singapore

ISBN: (纸本)9781538635995

Secure network coding realizes the secrecy of the message when the message is transmitted via noiseless network and a part of edges or a part of intermediate nodes are eavesdropped. In this framework, if the channels of the network has noise, we apply the error correction to noisy channel before applying the secure network coding. In contrast, secure physical layer network coding is a method to securely transmit a message by a combination of coding operation on nodes when the network is given as a set of noisy channels. In this paper, we give several examples of network, in which, secure physical layer network coding realizes a performance that cannot be realized by secure network coding.

关键词： secrecy analysis secure communication noisy channel network coding computation and forward physical layer security

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network-coding Approach for Information-Centric networking

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IEEE SYSTEMS JOURNAL 2019年第2期13卷 1376-1385页

作者： Bilal, Muhammad Kang, Shin-Gak Hankuk Univ Foreign Studies Yongin 17035 South Korea Elect & Telecommun Res Inst Daejeon 305700 South Korea

The current internet architecture is inefficient in fulfilling the demands of newly emerging internet applications. To address this issue, several over-the-top application-level solutions have been employed, making the overall architecture very complex. Information-centric-networking (ICN) architecture has emerged as a promising alternative solution. The ICN architecture decouples the content from the host at the network level and supports the temporary storage of content in an in-network cache. Fundamentally, the ICN can be considered a multisource, multicast content-delivery solution. Because of the benefits of network coding in multicasting scenarios and proven benefits in distributed storage networks, the network coding is apt for the ICN architecture. In this study, we propose a solvable linear network-coding scheme for the ICN architecture. We also propose a practical implementation of the network-coding scheme for the ICN, particularly for the content-centric network (CCN) architecture, which is termed the coded CCN. The performance results show that the network-coding scheme improves the performance of the CCN and significantly reduces the network traffic and average download delay.

关键词： Content delivery download delay informationcentric networking (ICN) in-network caching multicast network coding network traffic

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Reliable Video Streaming over mmWave with Multi Connectivity and network coding

Reliable Video Streaming over mmWave with Multi Connectivity...

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International Conference on Computing, networking and Communications (ICNC)

作者： Drago, Matteo Azzino, Tommy Polese, Michele Stefanovic, Cedomir Zorzi, Michele Univ Padua Dept Informat Engn Padua Italy Aalborg Univ Dept Elect Syst Aalborg Denmark

ISBN: (纸本)9781538636527

The next generation of multimedia applications will require the telecommunication networks to support a higher bitrate than today, in order to deliver virtual reality and ultra-high quality video content to the users. Most of the video content will be accessed from mobile devices, prompting the provision of very high data rates by next generation (5G) cellular networks. A possible enabler in this regard is communication at mmWave frequencies, given the vast amount of available spectrum that can be allocated to mobile users;however, the harsh propagation environment at such high frequencies makes it hard to provide a reliable service. This paper presents a reliable video streaming architecture for mmWave networks, based on multi connectivity and network coding, and evaluates its performance using a novel combination of the ns-3 mmWave module, real video traces and the network coding library Kodo. The results show that it is indeed possible to reliably stream video over cellular mmWave links, while the combination of multi connectivity and network coding can support high video quality with low latency.

关键词： Streaming media network coding Long Term Evolution Decoding Reliability Encoding Cellular networks

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Signal-Aligned network coding in Interference Channels with Limited Receiver Cooperation

Signal-Aligned Network Coding in Interference Channels with ...

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IEEE/CIC International Conference on Communications in China (ICCC)

作者： Chan, Tse-Tin Lok, Tat-Ming Chinese Univ Hong Kong Dept Informat Engn Hong Kong Peoples R China

ISBN: (纸本)9781538670057

In this paper, we propose the ideas of signal-aligned network coding (SNC). We present the ideas in two-user time-varying interference channels with limited receiver cooperation. We assume that the receivers are connected to a central processor via wired cooperation links with individual limited capacities. Our SNC scheme determines the precoding matrices of the transmitters so that the transmitted signals are aligned at the receivers. The aligned signals are then decoded into linear combinations of messages by physical-layer network coding strategy. The key idea of our scheme is to ensure that independent linear combinations of messages, also known as network-coded messages, can be decoded at the receivers. Hence the central processor can recover the original messages of the transmitters by solving the linearly independent equations. We prove that our SNC scheme achieves full degrees of freedom (DoF) by utilizing signal alignment and physical-layer network coding. Simulation results show the DoF achieved by our SNC scheme almost doubles that by the orthogonal transmission scheme in two-user time-varying interference channels with limited receiver cooperation. The performance improvement of our SNC scheme mainly comes from efficient utilization of the signal subspaces for conveying independent linear combinations of messages to the central processor.

关键词： Receivers Transmitters Interference channels network coding Precoding Mathematical model

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Practical deployment of network coding for real-time applications in 5G networks 15

Practical deployment of network coding for real-time applica...

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15th IEEE Annual Consumer Communications and networking Conference (CCNC)

作者： Gabriel, Frank Nguyen, Giang T. Schmoll, Robert-Steve Cabrera, Juan A. Muehleisen, Maciej Fitzek, Frank H. P. Deutsch Telekom Chair Commun Networks Dresden Germany Tech Univ Dresden SFB HAEC 912 Dresden Germany Ericsson Res Aachen Germany

ISBN: (纸本)9781538647905

The 5G communication system will provide flexible and programmable networks by leveraging softwarization technologies such as NFV and SDN. That advanced feature of 5G networks will be demonstrated in the context of real-time video surveillance for public safety. Specifically, we demonstrate for the first time a practical deployment of Random Linear network coding (RLNC) with NFV and SDN technologies to improve video quality against packet loss due to congestion at the core network and signal impairment of lossy channels at network edges. The demonstration implements NFV and SDN applications on COTS devices to prove its flexibility and portability.

关键词： network coding RLNC NFV SDN real-time video 5G surveillance

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Experimental Performance Analysis of network coding in Wireless Systems 87

Experimental Performance Analysis of Network Coding in Wirel...

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87th IEEE Vehicular Technology Conference (VTC-Spring)

作者： Qazi, Shahzaib Zafar, Syed Muhammad Zain Salman, Atif Hassan, Syed Ali Jayakody, Dushantha Nalin K. Natl Univ Sci & Technol NUST Sch Elect Engn & Comp Sci SEECS Islamabad 44000 Pakistan Natl Res Tomsk Polytech Univ Tomsk Russia

ISBN: (纸本)9781538663554

network coding (NC) holds great significance in the upcoming 5G paradigm because of the potential improvements it offers in terms of network throughput, energy efficiency and data security. However, the evidence for these potential advantages comes mainly from within a theoretical framework or is based on simulations;there is a paucity of empirical evidence. Secondly, few works have evaluated NC in terms of its impacts on both throughput and bit error rate (BER) simultaneously. The work outlined in this paper addresses both of the aforementioned issues. We implement both the NC and non-NC schemes for a communication system in the context of n-source multiple-input single-output (MISO) topologies on software-defined radios (SDRs). The performances of the two schemes have been compared in terms of BER, throughput and goodput or useful throughput. Our results show that the goodput improvement in NC when compared to non-NC is more pronounced at higher transmitter (Tx) gains and that below a certain Tx gain threshold, non-NC should be preferred over NC.

关键词： network coding BER two-way relay channel multiple-input single-output USRP GNU Radio

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