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communication, Computer Sciences and Engineering (IC3SE), International conference on

作者： Kumaran U Thammisetty Swetha Ishi Sharma R Keerthana V Tejashwini Ganesh Gopal Devarajan Department of Computer Science & Engineering Amrita School of Computing Amrita Vishwa Vidyapeetham Bengaluru India Department of Computer Science & Engineering (Data Science) Madanapalle Institute of Technology & Science Madanapalle Andhra Pradesh India Department of Electronics and Communication Engineering Amrita School of Engineering Amrita Vishwa Vidyapeetham Bengaluru India Department of Computer Science and Engineering SRM Institute of Science and Technology Delhi NCR campus Ghaziabad Uttar Pradesh India

ISBN: (数字)9798350366846

ISBN: (纸本)9798350366853

In the fast changing world of cloud based internet of things (IoT) eco-systems, secure connectivity between devices and cloud services is vital. On the other hand, the rising Man-in-the- Middle (MitM) attacks present serious threats to data integrity and confidentiality. In this regard, through a combination of Software Defined networking (SDN) and Blockchain technology, this study proposes an innovative technique for improving security architecture in cloud IoT settings against MitM attacks. The solution put forward relies on blockchain to provide immutable transactions that are used as tamper-proof ledgers for device authentication and secure data sharing. Smart contracts create unchangeable transactions that also maintain the anonymity of devices and their communication processes. Additionally, SDN technology segments traffic, implements dynamic network policies, and therefore reduces MitM attack vectors through traffic inspection and access control. The testing process has shown that the approach effectively prevents MitM attacks while ensuring safe communication channels in cloud-based IoT systems. This implementation demonstrates improved data integrity, confidentiality, and security against unwanted intrusion attempts. This research paper contributes to the development of the cloud-based IoT security paradigm and highlights the synergistic potential of Blockchain and SDN in dealing with common security issues and improving the trustworthiness of networked devices for the Internet of Things.

关键词： Cloud computing Data integrity Smart contracts Computer architecture Inspection Vectors Blockchains

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Ad hoc routing for cellular coverage extension

Ad hoc routing for cellular coverage extension

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IEEE conference on Vehicular Technology (VTC)

作者： I. Gruber G. Bandouch Hui Li Lehrstuhl für Kommunikationsnetze Technische Universität Munchen Munich Germany Lehrstuhl für Kommunikationsnetze Technische Universität München Munich Germany Siemens AG Munich Germany

In order to extend the cell coverage of upcoming 3G cellular systems, this paper proposes a novel routing algorithm based on ad hoc networking. The utilization of ad hoc network nodes as relays for calls designated to the base station greatly improves the flexibility of cellular networks. It reduces the CDMA inherent cell breathing behavior by reducing the maximum necessary cell radius. Further more, it increases the distance between adjacent base stations and therewith the cost of deployment. Due to the sake of efficiency, the ad hoc routing for cellular coverage extension (ARCE) algorithm violates the ad hoc networking paradigm of a distributed interworking between nodes. ARCE relies on architecture with base stations as central controls maintaining the entire network. all hops from a mobile node to the base station are within the ad hoc network; only the last hop towards the base station is inside the cellular domain. The algorithm requires route requests and route replies as in common ad hoc networks, but allows the efficient calculation of multiple, not necessary disjoint paths.

关键词： Routing Cellular networks Base stations Ad hoc networks Land mobile radio cellular systems Multiaccess communication Centralized control Mobile communication Geometry Relays

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Wireless Energy Transfer in RIS-Aided Cell-Free Massive MIMO systems: Opportunities and Challenges

arXiv

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arXiv 2022年

作者： Shi, Enyu Zhang, Jiayi Chen, Shuaifei Zheng, Jiakang Zhang, Yan Ng, Derrick Wing Kwan Ai, Bo The School of Electronic and Information Engineering Beijing Jiaotong University Beijing100044 China The State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing100044 China The School of Electrical Engineering and Telecommunications University of New South Wales NSW2052 Australia

In future sixth-generation (6G) mobile networks, the Internet-of-Everything (IoE) is expected to provide extremely massive connectivity for small battery-powered devices. Indeed, massive devices with limited energy storage capacity impose persistent energy demand hindering the lifetime of communication networks. As a remedy, wireless energy transfer (WET) is a key technology to address these critical energy supply issues. On the other hand, cell-free (CF) massive multiple-input multiple-output (MIMO) systems offer an efficient network architecture to realize the roll-out of the IoE. In this article, we first propose the paradigm of reconfigurable intelligent surface (RIS)-aided CF massive MIMO systems for WET, including its potential application scenarios and system architecture. The four-stage transmission procedure is discussed and analyzed to illustrate the practicality of the architecture. Then we put forward and analyze the hardware design of RIS. Particularly, we discuss the three corresponding operating modes and the amalgamation of WET technology and RIS-aided CF massive MIMO. Representative simulation results are given to confirm the superior performance achieved by our proposed schemes. Also, we investigate the optimal location of deploying multiple RISs to achieve the best system performance. Finally, several important research directions of RIS-aided CF massive MIMO systems with WET are presented to inspire further potential investigation. Copyright © 2022, The Authors. all rights reserved.

关键词： network architecture

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Wireless Ad-Hoc network: Analysis for Power control architecture

Wireless Ad-Hoc Network: Analysis for Power Control Architec...

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International conference on network Applications Protocols and Services (NETAPPS)

作者： Bharat Singh Neel Mani Sumit Kadyan Bhaskar Deosarkar Chandra Shekhar Department of CSE Rajasthan Technical University Kota Rajasthan India Department of CSE Jamia Hamdard University New Delhi India Malaviya National Institute of Technology Jaipur Rajasthan India

Ad-hoc networks have been proposed for a variety of applications where support for real time, multimedia services may be necessary. In order to operate ad hoc networks several protocols, for media access control, power control, routing, and transport are needed. We take a holistic approach to the problems in ad hoc networks. We start by postulating general design principles for power control based on the effect of transmit power on various performance metrics. These are used to design a set of protocols which attempt to optimize different performance metrics, as all the metrics cannot be simultaneously optimized in general. Some of these protocols have been implemented in the Linux kernel in an architecturally appropriate manner. Extensive testing was not possible due to the limitations of the current generation of hardware, and so performance results obtained through NS2 simulations are used to illustrate the potential benefits of the power control protocols. Our work at the routing layer is motivated by the difficulty in implementing on-demand routing protocols for ad hoc networks in common operating systems. It provides an API and its implementation in Linux as a user-space library (ASL), which facilitates implementation of on-demand routing protocols. It has been used to implement a few routing protocols.

关键词： Ad hoc networks Power control Topology Protocols network topology Wireless communication Routing

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Routing and wavelength assignment vs. wavelength converter placement in all-optical networks

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IEEE communications Magazine 2003年第8期41卷 S22-S28页

作者： Li, Bo Chu, Xiaowen Sohraby, Kazem Computer Science Department Hong Kong Univ. of Sci. and Technol. Hong Kong Hong Kong Computer Science Department College of Engineering University of Arkansas Fayetteville AR United States

Blocking has been the key performance index in the design of an all-optical network. Existing research demonstrates that an effective routing and wavelength assignment strategy and a proper wavelength converter placement algorithm are the two primary vehicles for improving the blocking performance. However, these two issues have largely been investigated separately in that the existing RWA algorithms have seldom considered the presence of wavelength conversion, while the wavelength converter placement algorithms have largely assumed that a static routing and random wavelength assignment algorithm is employed. The main objective of this article is to present some strong evidences that these two issues need to be considered jointly, and call for the reexamination of both RWA and wavelength converter placement.

关键词： optical communication

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A fairness study of the adaptive RIO active queue management algorithm

A fairness study of the adaptive RIO active queue management...

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Mexican International conference on Computer Science (ENC)

作者： R. Cartas J. Orozco J. Incera D. Ros ITAM Mexicali Mexico GET/ENST Bretagne IRISA ARMOR Research Team Rennes France GET/ENST Bretagne IRISA ARMOR Research Team Cesson-Sevigne France

Active queue management (AQM) mechanisms manage queue lengths by dropping packets when congestion is building up; end-systems can then react to such losses by reducing their packet rate, hence avoiding severe congestion. They are also very useful for the differentiated forwarding of packets in the DiffServ architecture. Many studies have shown that setting the parameters of an AQM algorithm may prove difficult and error-prone, and that the performance of AQM mechanisms is very sensitive to network conditions. The adaptive RIO mechanism (A-RIO) addresses both issues. It requires a single parameter, the desired queuing delay and adjusts its internal dynamics accordingly. A-RIO has been thoroughly evaluated in terms of delay response and network utilization but no study has been conducted in order to evaluate its behaviour in terms of fairness. By way of ns-2 simulations, This work examines A-RIO's ability to fairly share the network's resources (bandwidth) between the flows contending for those resources. Using Jain's fairness index as our performance metric, we compare the bandwidth distribution among flows obtained with A-RIO and with RIO.

关键词： Quality of service Aggregates Diffserv networks Bandwidth Harmonic analysis Traffic control Tin Throughput communication system traffic control Delay

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Simulation of a 3 priority queueing model to improve the quality of service (QOS) in ATM network

Simulation of a 3 priority queueing model to improve the qua...

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International conference on communication systems

作者： S. Ahmed B.M. Ali M. Abbas B. Moorehead Microelectronics and Communication Research Group Department of Electronics and Computer Engineering Faculty of Engineering Universiti Pertanian Malaysia Serdang Selangor Darul Ehsan Malaysia Department ofCommunication Engineering Faculty of Electrical Universiti Teknologi Malaysia Kuala Lumpur Malaysia

We introduce computer simulation results that illustrate performance trade-offs associated with the mixed priority queueing model (MPQ) for the initial introductory phase of switching and demultiplexing fabrics for ATM based high-speed multimedia networking services. We study the hierarchical shared memory ATM switch architecture in which the queues for all the switch output ports share space flexibly in a common buffer. Using computer simulation of this shared buffer ATM switch under both uniform and bursty traffic, we investigate the delay and cell loss probability (CLP) for the each class of traffic. Our finding supports the MPQ model as a worthwhile strategy for buffer management to improve the quality of service (QOS) in an ATM etwork.< >

关键词： Switches Asynchronous transfer mode Computer simulation Traffic control Quality of service Computational modeling Demultiplexing Fabrics Computer architecture Memory architecture

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AMS: an adaptive middleware system for wireless ad hoc networks

AMS: an adaptive middleware system for wireless ad hoc netwo...

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MILCOM, Military communications conference

作者： C.-Y.J. Chiang R. Chadha G. Levin Shihwei Li Yuu-Heng Cheng A. Poylisher Telcordia Technologies Inc. Piscataway NJ USA

The characteristics of ad hoc networks greatly increase the complexity of programming distributed applications with respect to both sending and receiving messages. This is because the network programming API based upon TCP and UDP was designed for the relatively stable, stationary Internet. The semantics of the API does not address the emerging issues from the dynamic mobile wireless ad hoc networks. One promising approach for alleviating this problem is to develop applications on top of a middleware system to shield applications from dealing with the dynamics of ad hoc networks. However, conventional middleware systems were not designed to cope with the frequently changing communications characteristics of military ad hoc networks. In order to address the above problem, we have designed and implemented a prototype of AMS , an Adaptive Middleware System with the following features. First, this middleware system is specifically designed to deal with dynamic and unreliable networks. Second, it shields communicating entities from coping with frequently changing networks via an API with semantics that provide a suitable abstraction of the underlying dynamic networks. Third, it allows individual applications to define their own communications requirements while the middleware system can set the lowest common requirements for all the communications per the military situations. Lastly, this middleware system has an interface that allows an external control system to adjust the values of its parameters to optimize the overall system performance.

关键词： Adaptive systems Middleware Mobile ad hoc networks Ad hoc networks Military communication IP networks Mobile communication Prototypes communication system control control systems

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Using genetic algorithms to optimize the behaviour of adaptive multimedia applications in wireless and mobile scenarios

Using genetic algorithms to optimize the behaviour of adapti...

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IEEE conference on Wireless communications and networking

作者： P.M. Ruiz A.F. Gomez-Skarmeta Research and Development Department Agora Systems S. A. Madrid Spain Department Information Engineering Communications Facultad de Informtica University of Murcia Murcia Spain

Adaptive applications are a key concept to take into account when dealing with multimedia internetworking in wireless and mobile environments in which abrupt changes in the network conditions may occur. In these scenarios not all the problems in the multimedia quality are due to congestion, as it happens in fixed networks, but also to interference, mobility, and many other issues. This paper presents an adaptation architecture allowing applications to use adaptation techniques at the application layer to minimize the impact of adverse and changing network conditions. This allows maintaining the QoS perceived by the user in an acceptable level. In addition, we optimize the adaptive behavior using genetic algorithms to estimate the optimal triggers for the adaptation function. We present some results comparing the fitness of using such adaptive techniques against the traditional multimedia internetworking.

关键词： Genetic algorithms Wireless networks Bandwidth Streaming media Internetworking Interference Radio link Multimedia systems Research and development Mobile communication

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Exploring intelligent peripheral configurations

Exploring intelligent peripheral configurations

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International conference on Universal Personal communications

作者： M. Chopra GTE Laboratories Inc. Carrollton TX USA

The intelligent peripheral (IP) is one of the most important components of the advanced intelligent network (AIN) infrastructure for implementing new network based services that cannot be easily provided by the traditional switching elements. Bellcore has developed requirements for the IP interface in document TA-NWT-001129; this document recommends that all the IP-SCP communication be routed through the service switching point (SSP). This IP interface recommendation is unnecessarily expensive in terms of SSP central processing unit (CPU) resources as every message exchanged between the SCP and the IP is translated by the SSP. Furthermore, the Bellcore recommended interface will not be available for a few more years from the major switching vendors. This may delay the deployment of AIN services leading the customers to seek other competing technologies. In GTEs AIN testbed we have implemented direct control of the IP from the service control point (SCP) as an alternative to Bellcore IP interface, and in our experience, this interface definitely proves a worthy alternative. The paper gives an overview of alternative TP configurations and how they are used in services such as UPT registration and out-call. A brief qualitative comparison of the Bellcore recommended architecture and the direct IP-SCP interface and a hybrid interface is presented.< >

关键词： Testing Intelligent networks Switching systems Switches IEEE news communication switching Central Processing Unit Telecommunication switching Laboratories Delay

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