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Decentralized PHY/MAC Design for the Uplink of Multi-Packet Reception Wireless networks 14

Decentralized PHY/MAC Design for the Uplink of Multi-Packet ...

引用

14th IEEE international Wireless communications and Mobile Computing conference (IWCMC)

作者： Furtado, Antonio Oliveira, Rodolfo Bernardo, Luis Dinis, Rui Univ Nova Lisboa FCT Dept Engn Electrotecn P-2829516 Caparica Portugal IT Aveiro Portugal

ISBN: (纸本)9781538620700

Decentralized PHY/MAC techniques for the uplink of Multi-Packet Reception (MPR) schemes are of great interest in future wireless communication systems (e.g. IEEE 802.11ax). In MPR schemes the average number of successful received packets depends on the radio propagation effects, the number of nodes simultaneously transmitting and the capture threshold that characterizes the PHY-layer MPR technology. In this paper we adopt a MPR capture model capable of describing the average number of successful packets simultaneously received. the capture model is then used in an optimal reservation-based medium access control (MAC), designed to operate in a decentralized way through a random access policy. this work describes the PHY/MAC cross-layer design, as well as the rationale required to understand its optimality. While the main objective of the proposed MAC is to achieve the optimal number of simultaneous transmissions that maximize the PHY-layer performance, a cost due to the MAC reservation period must also be considered in the optimization process. A model of the PHY/MAC performance is derived, which allows the optimization of the parameters that regulate the nodes' random access. Different simulation results are described and compared with numerical results obtained with the proposed PHY/MAC model. the paper ends up discussing possible solutions to implement the proposed methodology in practical wireless networks formed by a high number of competing nodes.

关键词： Optimal Cross-layer Design Decentralized PHY/MAC modeling Multi-Packet Reception Wireless communication systems

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the Aspects of Doppler Assisted Wireless communication

The Aspects of Doppler Assisted Wireless Communication

引用

international conference on Industrial and Information systems, ICIIS

作者： Dushyantha A. Basnayaka Global Investment Operations at Aberdeen Standard Investments (ASI) Edinburgh UK

ISBN: (数字)9781728137063

ISBN: (纸本)9781728137070

Doppler assisted wireless communication (DAWC) is a narrow band communication technique that leverages a rotating drum conformal antenna for interference mitigation. the different multi-path components that impinge on this rotating drum antenna undergo different Doppler shifts giving rise to different spectral characteristics for different multi-path components. the rotation speed of the antenna could be adjusted such that the interfering multi-path components, that has reasonable azimuthal separation to the desired multi-path components, are filtered out by the receiver pulse shaping filter with no extra effort. In this paper, we study the effectiveness of DAWC to suppress co-channel interference (CCI) from a large number of co-channel users, which is a prevailing condition in highly dense cellular communication systems like 5G. We further discuss several key challenges associated with DAWC, including the inter-symbol interference (ISI) induced by Doppler effect.

关键词： Interference Doppler effect Receivers Low pass filters Antennas Wireless networks

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P-Rex: Fast Verification of MPLS networks with Multiple Link Failures 14

P-Rex: Fast Verification of MPLS Networks with Multiple Link...

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14th international conference on Emerging Networking EXperiments and Technologies (CoNEXT)

作者： Jensen, Jesper Stenbjerg Krogh, Troels Beck Madsen, Jonas Sand Schmid, Stefan Srba, Jiri thorgersen, Marc Tom Aalborg Univ Aalborg Denmark Univ Vienna Vienna Austria Aalborg Univ Aalborg Denmark TU Berlin Berlin Germany FI MU Brno Brno Czech Republic

ISBN: (纸本)9781450360807

Future communication networks are expected to be highly automated, disburdening human operators of their most complex tasks. However, while first powerful and automated network analysis tools are emerging, existing tools provide only limited (and inefficient) support of reasoning about failure scenarios. We present P-Rex, a fast what-if analysis tool, that allows us to test important reachability and policy-compliance properties even under an arbitrary number of failures, in polynomial-time, i.e., without enumerating all failure scenarios (the usual approach today, if supported at all). P-Rex targets networks based on Multiprotocol Label Switching (MPLS) and its Segment Routing (SR) extension and comes with an expressive query language based on regular expressions. It takes into account the actual router tables, and is hence well-suited for debugging. We also report on an industrial case study and demonstrate that P-Rex supports rich queries, performing what-if analyses in less than 70 minutes in most cases, in a 24-router network with over 100,000 MPLS forwarding rules.

关键词： Network Verification MPLS Prefix Rewriting systems

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A Practical Protocol for Wireless Powered communications

A Practical Protocol for Wireless Powered Communications

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international conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service (TELSIKS)

作者： Marija Poposka Zoran Hadzi-Velkov Slavche Pejoski Faculty of Electrical Engineering and Information Technologies Ss. Cyril and Methodius University Skopje N.Macedonia

ISBN: (数字)9781728108780

ISBN: (纸本)9781728108797

In the literature, wireless powered communication networks (WPCNs) are typically assumed to employ dynamic time division multiple access (TDMA), such that the rate and duration for information transmission of each energy harvesting user (EHU) is adjusted in each TDMA frame. Such implementations are fairly complex, so, in this paper, we propose a simple model for a WPCN employing a static TDMA, where each EHU employs fixed rate transmission over fixed time slot duration. Specifically, we develop a simple communication scheme that maximizes the network throughput by proper selection of the duration of the radio frequency energy broadcasts by the base station (BS), and the optimal information rate and optimal transmission duration of each EHU. the performance of such system depends only on the average gains of the channels between the BS and each EHU, which can be estimated more cost effectively than the instantaneous channel state information.

关键词： Time division multiple access Wireless communication throughput communication networks Energy harvesting Batteries Resource management

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2018 14th international conference on Perspective Technologies and Methods in MEMS Design, MEMSTECH 2018 - Proceedings

2018 14th International Conference on Perspective Technologi...

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14th international conference on Perspective Technologies and Methods in MEMS Design, MEMSTECH 2018

the proceedings contain 61 papers. the topics discussed include: a prototype of the mobile stethoscope for telemedical application;accuracy of marker location identification for investigation into mechanics of ball;algorithms of automated formulation of the operability condition of complex technical systems;analysis of metal defects by distributed cumulative histogram;application of fractional order transfer function with zero and pole in approximation of electromechanical systems high order objects;application of MEMS sensors for the automation of a laboratory stand for the measurement of the flow resistance of porous materials;M2M communication protocol for low bandwidth MEMS sensor networks;and computer investigation of the process of thermoelastic energy dissipation in the electroconductive hollow cylindrical sensor under the radio impulse action.

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SMARthO: A Network Initiated Handover in NG-RAN using P4-based Switches 14

SMARTHO: A Network Initiated Handover in NG-RAN using P4-bas...

引用

14th international conference on Network and Service Management (CNSM)

作者： Palagummi, Phanindra Sivalingam, Krishna M. Indian Inst Technol Madras Dept CSE Chennai Tamil Nadu India

ISBN: (纸本)9783903176140

this paper deals with the design of protocols for 5G-and-beyond wireless networks. In particular, it considers a Next Generation RAN (NG-RAN), where the Base Band Unit (BBU) functions are split across a Central Unit (CU) and a Distributed Unit (DU). this paper proposes the use of Programming Protocol independent Packet Parsers (P4) based switches between the CU and DU for processing packets exchanged between the two. We demonstrate the smart hand-over (SMARthO) scheme for a mobile User Equipment (UE) that traverses a known fixed path. the idea is to perform the resource allocation in subsequent macro-cells in advance of the user's movement, by having the P4 switch spoof the behaviour of the UE. Based on an implementation using Mininet and P4BM software switches, it is seen that the proposed method leads to around 18% and 25% reduction in handover time, for two- and three-handover sequences, respectively.

关键词： 5G mobile communication systems

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Adaptive Secrecy Amplification With Radio Channel Key Extraction 14

Adaptive Secrecy Amplification With Radio Channel Key Extrac...

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14th Annual international conference on Distributed Computing in Sensor systems (DCOSS)

作者： Nemec, Lukas Ostadal, Radim Matyas, Vashek Svenda, Petr Masaryk Univ Fac Informat Ctr Res Cryptog & Secur Brno Czech Republic

ISBN: (纸本)9781538654705

Wireless sensor networks with a large number of cheap low-power interconnected devices bring up challenging tasks when considering the security of their communications. Our paper addresses the issue how cryptographic link keys between communicating sensor nodes can be continuously re-secured even in presence of an attacker who can read the memory of captured nodes. Distributed sensor systems enable us to use two different approaches to link key (re-)establishment - secrecy amplification and key extraction from radio channel fading. A secrecy amplification protocol lets a group of neighboring nodes cooperate together to re-secure previously compromised link keys using the non-compromised paths, and previous research showed the ability of secrecy amplification protocols to improve the security of a network from 50% of compromised link keys to 90% of secure keys. Key extraction then exploits radio channel properties to generate secret bits shared between two radio-enabled devices. We propose to combine secrecy amplification and key extraction into a dynamic protocol, where every node will dynamically decide what approach provides a greater benefit, considering the probability of getting the link key re-secured and the resources available. In principle, the more standard traffic messages are exchanged on a given link, the more beneficiary is the usage of key extractions. And less busy links then rely on secrecy amplification(1).

关键词： adaptive autonomous cryptography distributed protocol security wireless radio communication

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An Enhanced Machine Larning based threat Hunter An Intelligent Network Intrusion Detection System

An Enhanced Machine Larning based Threat Hunter An Intellige...

引用

international conference on Computer Engineering and systems

作者： Sayed Salah Ahmed Hasan Hussein Abdel Atty Elsayed Mohamed Ayman M. Bahaa-Eldin Ain Shams University Cairo Egypt Misr International University on leave from Ain Shams University Cairo Egypt

ISBN: (数字)9781728152608

ISBN: (纸本)9781728152615

In network security, there are many applications and techniques that can be used to maintain targets of high-level security such as confidentiality, integrity, availability, and nonrepudiation for safe communication between different sources. this can be done by supporting networks with security systems to thwart any chances of exploitations by any attacker. Intrusion Detection System (IDS) is one of the major systems as it is capable of monitoring all network traffics (ingoing and outgoing) and performs some analysis and inspection to evaluate the behavior of such traffics. IDS can block all suspicious activities that are trying to breach any network based on policies that are demanded by a system administrator. Traditional IDS has some limits and does not provide a complete solution for some kind of problems. IDS searches for potential abnormal activities on the network traffic and sometimes succeeds to find some vulnerability which may result in compromising the network. We, therefore, suggest an efficient application in this paper of Machine Learning (ML) based IDS.

关键词： Intrusion detection IP networks Firewalls (computing) Telecommunication traffic Monitoring Protocols

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Modelling and Analysis of Wi-Fi and LAA Coexistence with Priority Classes 14

Modelling and Analysis of Wi-Fi and LAA Coexistence with Pri...

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14th international conference on Wireless and Mobile Computing, Networking and communications, WiMob 2018

作者： Baswade, Anand M. Beltramelli, Luca Antony, Franklin A Gidlund, Mikael Tamma, Bheemarjuna Reddy Guntupalli, Lakshmikanth Department of Computer Science and Engineering Indian Institute of Technology Hyderabad India Department of Information Systems and Technology Mid Sweden University Sweden

ISBN: (纸本)9781538668764

the Licensed Assisted Access (LAA) is shown as a required technology to avoid overcrowding of the licensed bands by the increasing cellular traffic. Proposed by 3GPP, LAA uses a Listen Before Talk (LBT) and backoff mechanism similar to Wi-Fi. While many mathematical models have been proposed to study the problem of the coexistence of LAA and Wi-Fi systems, few have tackled the problem of QoS provisioning, and in particular analysed the behaviour of the various classes of priority available in Wi-Fi and LAA. this paper presents a new mathematical model to investigate the performance of different priority classes in coexisting Wi-Fi and LAA networks. Using Discrete Time Markov Chains, we model the saturation throughput of all eight priority classes used by Wi-Fi and LAA. the numerical results show that with the 3GPP proposed parameters, a fair coexistence between Wi-Fi and LAA cannot be achieved. Wi-Fi users in particular suffer a significant degradation of their performance caused by the collision with LAA transmissions which has a longer duration compared to Wi-Fi transmissions. © 2018 IEEE.

关键词： Wi-Fi

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Implementation of an Intrusion Detection and Prevention System Module for Corporate Network Traffic Management 14

Implementation of an Intrusion Detection and Prevention Syst...

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14th international Scientific-Technical conference on Actual Problems of Electronic Instrument Engineering, APEIE 2018

作者： Basinya, Evgeny A. Ravtovich, Yuliya K. Research Institute of Information and Communication Technologies Novosibirsk Russia Novosibirsk State Technical University Novosibirsk Russia

ISBN: (纸本)9781538670545

the paper addresses an algorithm of functioning of an intrusion detection and prevention system module, based on the principles of disguise and modification of the information system parameters. An implementation of an integrated local area network security control system using the designed module is described. the proposed concept allows providing protection of the corporate computer networks and information systems from a range of network attacks (impersonation, imposition of improper route, distributed denial of service, man-in-the-middle attacks, etc). © 2018 IEEE.

关键词： Network security

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