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40 results on '"Physical layer (PHY)"'

1. Survey on 5G Physical Layer Security Threats and Countermeasures.

Author

Harvanek, Michal, Bolcek, Jan, Kufa, Jan, Polak, Ladislav, Simka, Marek, and Marsalek, Roman

Subjects
*PHYSICAL layer security, *TIME complexity, *SECURITY systems, *SOFTWARE frameworks, *DATA transmission systems
Abstract

With the expansion of wireless mobile networks into both the daily lives of individuals as well as into the widely developing market of connected devices, communication is an increasingly attractive target for attackers. As the complexity of mobile cellular systems grows and the respective countermeasures are implemented to secure data transmissions, the attacks have become increasingly sophisticated on the one hand, but at the same time the system complexity can open up expanded opportunities for security and privacy breaches. After an in-depth summary of possible entry points to attacks to mobile networks, this paper first briefly reviews the basic principles of the physical layer implementation of 4G/5G systems, then gives an overview of possible attacks from a physical layer perspective. It also provides an overview of the software frameworks and hardware tool-software defined radios currently in use for experimenting with 4G/5G mobile networks, and it discusses their basic capabilities. In the final part, the paper summarizes the currently most promising families of techniques to detect illegitimate base stations—the machine-learning-based, localization-based, and behavior-based methods. [ABSTRACT FROM AUTHOR]

Published
2024
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2. A Chisel Generator for Standardized 3-D Die-to-Die Interconnects

Author

Harrison Liew, Farhana Sheikh, Jong-Ru Guo, Zuoguo Wu, and Borivoje Nikolic

Subjects
3-D integrated circuits, die-to-die (D2D) interconnects, generator, physical design (PD), physical layer (PHY), redundancy, Computer engineering. Computer hardware, TK7885-7895
Abstract

A 3-D heterogeneous integration (3-D-HI) is poised to enable a new era of high-performance integrated circuits via a multitude of benefits, including a reduction in I/O power consumption and ability to tightly couple disparate technologies. However, a significant hurdle toward enabling a chiplet ecosystem is the standardization of 3-D die-to-die (D2D) interconnects that facilitate rapid integration. Technology-driven constraints highlighted in published works demonstrate that a unique approach to 3-D D2D interconnect design and implementation is required, while preserving the ability to customize the interconnect to accommodate future technology concerns and applications with minimal overhead. This article presents a framework to generate customized 3-D D2D interconnect physical layers (PHYs) that are simultaneously standard-compliant, physical-aware, and can be automatically integrated into all stacked chiplets. The generator framework leverages the Chisel hardware description language to allow designers to do the following: 1) compile a port list directly into a PHY; 2) automate design and physical design (PD); and 3) perform design space exploration of interconnect features (e.g., bump map pitch, clocking architecture, and others). The 3-D PHY generator framework and features detailed in this work can be used to produce a reference implementation for a standard like UCIe-3-D, representing a significant paradigm shift from current specification and design methodologies for 2.5-D D2D interconnect (e.g., UCIe) implementations. This work concludes with the results of a redundancy design space exploration tradeoff study, showing the benefits of a proposed spatial coding redundancy scheme in an example PHY using emulated 9- $\mu $ m hybrid bonding for a 4 Tx/4 Rx module array with 4:1 coding redundancy ratio.

Published
2024
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3. Survey on 5G Physical Layer Security Threats and Countermeasures

Author

Michal Harvanek, Jan Bolcek, Jan Kufa, Ladislav Polak, Marek Simka, and Roman Marsalek

Subjects
4G, 5G, security vulnerabilities, Physical Layer (PHY), machine learning, eavesdropping, Chemical technology, TP1-1185
Abstract

With the expansion of wireless mobile networks into both the daily lives of individuals as well as into the widely developing market of connected devices, communication is an increasingly attractive target for attackers. As the complexity of mobile cellular systems grows and the respective countermeasures are implemented to secure data transmissions, the attacks have become increasingly sophisticated on the one hand, but at the same time the system complexity can open up expanded opportunities for security and privacy breaches. After an in-depth summary of possible entry points to attacks to mobile networks, this paper first briefly reviews the basic principles of the physical layer implementation of 4G/5G systems, then gives an overview of possible attacks from a physical layer perspective. It also provides an overview of the software frameworks and hardware tool-software defined radios currently in use for experimenting with 4G/5G mobile networks, and it discusses their basic capabilities. In the final part, the paper summarizes the currently most promising families of techniques to detect illegitimate base stations—the machine-learning-based, localization-based, and behavior-based methods.

Published
2024
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4. M-Ary Aggregate Spread Pulse Modulation With Pulse-Shaping Power Control for Highly Scalable LPWANs

Author

Alexei V Nikitin and Ruslan L. Davidchack

Subjects
Aggregate spread pulse modulation (ASPM), the Internet of things (IoT), LoRa, low-power wide-area network (LPWAN), M-ary ASPM (M-ASPM), physical layer (PHY), Electrical engineering. Electronics. Nuclear engineering, TK1-9971
Abstract

M-ary Aggregate Spread Pulse Modulation (M-ASPM) is the physical layer (PHY) modulation technique that is well suited for use in low-power wide-area networks (LPWANs). Notably, M-ASPM combines high energy-per-bit efficiency, robustness, resistance to interference, and a number of other favorable technical characteristics, with the spread-spectrum ability to maintain the capacity of an uplink-focused network while extending its range. However, when all M-ASPM nodes transmit with the same average power, implementation of such capacity-preserving range extension may become impractical in complicated propagation environments with greatly varying path losses. Favorably, the efficiency of M-ASPM with constant-envelope pulses can be maintained effectively the same as the efficiency of transmitting a continuous constant-envelope waveform. Then the transmit power of different nodes can be adjusted, without sacrificing the transmission efficiency, to compensate for differences in the path attenuation. This enables us to significantly simplify planning and management of the network. In addition, such a variable-power approach generally increases the network capacity and the average energy efficiency of the nodes, as compared with the arrangement of the nodes with a constant transmit power. In this paper, we outline a practical approach to implementing such an energy-efficient M-ASPM power control, that can be used for scaling LPWANs with realistic desired and/or actual areal distributions of the uplink nodes under diverse propagation conditions.

Published
2023
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5. Intra-channel Interference Avoidance with the OGFDM Boosts Channel Capacity of Future Wireless Mobile Communication

Author

Kadhum, Mohammad R., Kanakis, Triantafyllos, Crockett, Robin, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Arai, Kohei, editor, Bhatia, Rahul, editor, and Kapoor, Supriya, editor

Published
2019
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6. Dynamic Bit Loading with the OGFDM Waveform Maximises Bit-Rate of Future Mobile Communications

Author

Kadhum, Mohammad R., Kanakis, Triantafyllos, Crockett, Robin, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Arai, Kohei, editor, Bhatia, Rahul, editor, and Kapoor, Supriya, editor

Published
2019
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7. 6G Wireless Systems: Vision, Requirements, Challenges, Insights, and Opportunities.

Author

Tataria, Harsh, Shafi, Mansoor, Molisch, Andreas F., Dohler, Mischa, Sjoland, Henrik, and Tufvesson, Fredrik

Subjects
LINEAR network coding, NEXT generation networks, RADIO transmitter-receivers, SIGNAL processing, RADIO frequency, ANTENNA arrays
Abstract

Mobile communications have been undergoing a generational change every ten years or so. However, the time difference between the so-called “G’s” is also decreasing. While fifth-generation (5G) systems are becoming a commercial reality, there is already significant interest in systems beyond 5G, which we refer to as the sixth generation (6G) of wireless systems. In contrast to the already published papers on the topic, we take a top-down approach to 6G. More precisely, we present a holistic discussion of 6G systems beginning with lifestyle and societal changes driving the need for next-generation networks. This is followed by a discussion into the technical requirements needed to enable 6G applications, based on which we dissect key challenges and possibilities for practically realizable system solutions across all layers of the Open Systems Interconnection stack (i.e., from applications to the physical layer). Since many of the 6G applications will need access to an order-of-magnitude more spectrum, utilization of frequencies between 100 GHz and 1 THz becomes of paramount importance. As such, the 6G ecosystem will feature a diverse range of frequency bands, ranging from below 6 GHz up to 1 THz. We comprehensively characterize the limitations that must be overcome to realize working systems in these bands and provide a unique perspective on the physical and higher layer challenges relating to the design of next-generation core networks, new modulation and coding methods, novel multiple-access techniques, antenna arrays, wave propagation, radio frequency transceiver design, and real-time signal processing. We rigorously discuss the fundamental changes required in the core networks of the future, such as the redesign or significant reduction of the transport architecture that serves as a major source of latency for time-sensitive applications. This is in sharp contrast to the present hierarchical network architectures that are not suitable to realize many of the anticipated 6G services. While evaluating the strengths and weaknesses of key candidate 6G technologies, we differentiate what may be practically achievable over the next decade, relative to what is possible in theory. Keeping this in mind, we present concrete research challenges for each of the discussed system aspects, providing inspiration for what follows. [ABSTRACT FROM AUTHOR]

Published
2021
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8. SECURE PERFORMANCE ANALYSIS OF ADAPTIVE ENERGY HARVESTING ENABLED RELAYING NETWORKS

Author

NGUYEN XUAN VIET, DAO THI THU THUY, LE SI PHU, NGUYEN HONG NHU, NGO TIEN HOA, DINH-THUAN DO, and MIROSLAV VOZNAK

Subjects
Cooperative jamming dual hop, Outage probability, Physical layer (PHY), Security, Engineering (General). Civil engineering (General), TA1-2040, Technology (General), T1-995
Abstract

In this paper, the impact of the jamming signal on the secrecy performance of Energy Harvesting (EH) enabled dual-hop amplify-and-forward relaying network is investigated. First, the security outage probability analysis is studied for conventional networks under a single passive eavesdropper attack. Then, the outage performance analysis in two cases regarding energy harvesting is investigated. Moreover, the proposed work enhances Physical Layer (PHY) security performance of two-hop relaying model using Cooperative Jamming Dual-Hop Techniques (CJDH). For this purpose, new closed-form expressions are derived for the outage probability of CJDH model in the presence of interference over Rayleigh fading channels. A power allocation optimization problem for energy harvesting protocol is formulated and solved for enhancing the system security. The derived analytical formulas herein are supported by numerical and simulation results to clarify the main contributions of the paper.

Published
2018

9. A Robust Symbol Timing Synchronization Scheme for OFDM Systems Applied in a Vehicular Network.

Author

Salih Abdelgader, Abdeldime Mohamed, Shu, Feng, Wu, Lenan, Wang, Jin, and Wang, Jun

Abstract

This paper presents a novel timing synchronization scheme for orthogonal frequency-division multiplexing communication systems by leveraging the phase shift caused by the timing error and the power difference between subcarriers. The proposed scheme is applied in the physical layer of vehicular ad hoc networks using the IEEE 802.11p standard. The proposed work joints three different estimators to present a robust synchronizer. The results demonstrate that the proposed estimators greatly improve the performance of the communication system and outperform other approaches in terms of the mean square error and the bit error rate. The estimators can either work as totally blind or data-aided using the preamble field of the IEEE 802.11p. [ABSTRACT FROM AUTHOR]

Published
2019
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10. Monitoring of Large-Area IoT Sensors Using a LoRa Wireless Mesh Network System: Design and Evaluation.

Author

Lee, Huang-Chen and Ke, Kai-Hsiang

Subjects
*ACQUISITION of data, *INTERNET of things, *SENSOR networks, *WIRELESS mesh networks, *WIRELESS communications
Abstract

Although many techniques exist to transfer data from the widely distributed sensors that make up the Internet of Things (IoT) (e.g., using 3G/4G networks or cables), these methods are associated with prohibitively high costs, making them impractical for real-life applications. Recently, several emerging wireless technologies have been proposed to provide long-range communication for IoT sensors. Among these, LoRa has been examined for long-range performance. Although LoRa shows good performance for long-range transmission in the countryside, its radio signals can be attenuated over distance, and buildings, trees, and other radio signal sources may interfere with the signals. Our observations show that in urban areas, LoRa requires dense deployment of LoRa gateways (GWs) to ensure that indoor LoRa devices can successfully transfer data back to remote GWs. Wireless mesh networking is a solution for increasing communication range and packet delivery ratio (PDR) without the need to install additional GWs. This paper presents a LoRa mesh networking system for large-area monitoring of IoT applications. We deployed 19 LoRa mesh networking devices over an $800\,\,\text {m} \times 600$ m area on our university campus and installed a GW that collected data at 1-min intervals. The proposed LoRa mesh networking system achieved an average 88.49% PDR, whereas the star-network topology used by LoRa achieved only 58.7% under the same settings. To the best of our knowledge, this is the first academic study discussing LoRa mesh networking in detail and evaluating its performance via real experiments. [ABSTRACT FROM AUTHOR]

Published
2018
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11. Performance analysis of WiMAX 802.16e physical layer model.

Author

Patidar, Mukesh, Dubey, Rupesh, Kumar Jain, Nitin, and Kulpariya, Sarita

Abstract

The WiMAX (Worldwide Interoperability for Microwaves Access) is a promising technology which can offer high speed voice, video and data service up to the customer end. The development of 802.16 standards for BWA (Broadband Wireless Access) technologies was motivated by the rapidly growing need for high-speed, ubiquitous and cost effective access. The WiMAX can also be considered to be the main technology in the implementation of other networks like wireless sensor networks. Developing an understanding of the WiMAX system can be best achieved by looking at a model of the WiMAX system. This paper discusses the model building of the WiMAX physical layer using simulink in Matlab R2009a version. This model is a useful tool for BER (Bit Error Rate) performance evaluation for the real time audio data communication by the WiMAX physical layer, under different channel encoding rate, and digital modulation schemes and channel conditions, besides serving as a helpful resource for the students and the researchers who want to base their studies and research in the field of WiMAX. In this paper, transmitter and reciver model are simulated according to the parameters established by the standards, to evaluate the performance. Also convolution coding is used to improve the system performance. The performance analysis is being done by studying the bit loss and packet losses occurred during transmission over the channel. [ABSTRACT FROM PUBLISHER]

Published
2012
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12. Adaptive Mechanism for Aggragation with fragments retransmission in high-speed wireless networks.

Author

Ibrahim, Firas

Subjects
ACCESS control, IEEE 802.11 (Standard), TIME-varying systems, WIRELESS LANs, LOCAL area networks, WIRELESS communications
Abstract

The aim of this paper is to propose an adaptive mechanism for aggregation with fragments retransmission, to create appropriate simulator and to examine performance of this aggregation mechanism, taking into account time-varying radio channel characteristics and their strong relation with errors. [ABSTRACT FROM AUTHOR]

Published
2011

13. UWB Systems for Wireless Sensor Networks.

Author

ZHANG, JINYUN, ORLIK, PHILIP V., SAHINOGLU, ZAFER, MOLISCH, ANDREAS F., and KINNEY, PATRICK

Subjects
DETECTORS, CODING theory, MULTIPLE access protocols (Computer network protocols), LINE-of-sight radio links, INDUSTRIAL engineering, COMMUNICATION & technology
Abstract

Wireless sensor networks are emerging as an important area for communications. They enable a wealth of new applications including surveillance, building control, factory automation, and in-vehicle sensing. The sensor nodes have to operate under severe constraints on energy consumption and form factor, and provide the ability for precise selflocation of the nodes. These requirements can be fulfilled very well by various forms of ultra-wide-band (UWB) transmission technology. We discuss various techniques and tradeoffs in UWB systems and indicate that time-hopping and frequencyhopping impulse radio physical layers combined with simple multiple-access techniques like ALOHA are suitable designs. We also describe the IEEE 802.15.4a standard, an important system that adopts UWB impulse radio to ensure robust data communications and precision ranging. In order to accommodate heterogeneous networks, it uses specific modulation, coding, and ranging waveforms that can be detected well by both coherent and noncoherent receivers. [ABSTRACT FROM AUTHOR]

Published
2009
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14. An energy-efficient centralized dynamic time scheduling for internet of healthcare things.

Author

Mahendran, Rakesh Kumar, V., Prabhu, V., Parthasarathy, Thirunavukkarasu, Usharani, A., Mary Judith, and S., Jagadeesan

Subjects
*INTERNET of things, *SCHEDULING, *ELLIPTIC curve cryptography, *TRAFFIC congestion, *CONSERVATION of energy, *WIRELESS sensor networks
Abstract

[Display omitted] Recently, The conservation of energy in these nodes is of utmost importance for Internet of Things (IoT) systems used in monitoring patients. The significant factors that cause power consumption in an Internet of Healthcare Things (IoHT) network. Hence, a novel MAC resource allocation protocol called Centralized Dynamic Time Scheduling (CDTS) is designed to overcome these issues. The CDTS system helps to avoid congestion and network traffic in the IoHT network. This proposed approach is compared with a fuzzy-based technique to measure efficiency. It is observed that our proposed technique reduced power consumption by up to 20% and is suitable for real-time healthcare applications. • The conservation energy in IoHT network is cited as major concern. • To avoid congestion and network traffic in the IoHT network. • A novel CDTS resource allocation protocol is designed to increase network lifetime. • A new dynamic feedback loop method reduces the total bit error rate in the network. • Our proposed method power consumption by up to 20%. Due to the limited energy source in the sensor nodes, the conservation of energy in these nodes is of utmost importance for Internet of Things (IoT) systems used in monitoring patients. The significant factors that cause power consumption in an Internet of Healthcare Things (IoHT) network are network interference, resource allocation, and time spent idly by body sensors. Moreover, complex encoding, decoding, and encryption processes could increase the processing time in both Media Access Control (MAC) and Physical (PHY) layers. Hence, a novel MAC resource allocation protocol called Centralized Dynamic Time Scheduling (CDTS) is designed to overcome these issues. The CDTS system helps to avoid congestion and network traffic in the IoHT network. The main objective of this algorithm is to reduce the active time of each sensor in the network. We also reduced the total bit error rate in the network by introducing a dynamic bit interleaving method with a feedback loop. It is known that In the PHY layer, encoding and decoding are implemented with the help of a passive modulation scheme to reduce the delay in the network. In the encryption process, the Elliptic curve cryptography(ECC) method is used, which reduces the number of iterations required for encrypting the data. This proposed approach is compared with a fuzzy-based technique to measure efficiency. It is observed that our proposed technique reduced power consumption by up to 20% and is suitable for real-time healthcare applications. [ABSTRACT FROM AUTHOR]

Published
2021
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15. Beyond the LAN: Ethernet's Evolution into the Public Network.

Author

Kellett, Paul

Subjects
*ETHERNET, *LOCAL area networks, *WIDE area networks, *COMPUTER networks, *TECHNOLOGICAL innovations
Abstract

This article details the evolution of Ethernet into Gigabit Ethernet and how this LAN-based technology has undergone major transformations over time. From its data rates and distances to supported media and functionality, Ethernet has greatly improved, enabling it to surmount many of its former limitations and in so doing to expand beyond the LAN into the MAN and now even the WAN. In this article, Pioneer Consulting explores the evolution further by focusing on some of the major technological directions in the Ethernet equipment industry. [ABSTRACT FROM AUTHOR]

Published
2003
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16. Energy-Efficient Mapping of LTE-A PHY Signal Processing Tasks on Microservers

Author

Andre Bourdoux, Bert Gyselinckx, Anup Das, and Francky Catthoor

Subjects
Technology, neural network, Computer Networks and Communications, Computer science, Cloud computing, 02 engineering and technology, physical layer (PHY), PHY, 0202 electrical engineering, electronic engineering, information engineering, principal component analysis (PCA), Network architecture, Radio access network, Science & Technology, Renewable Energy, Sustainability and the Environment, business.industry, Physical layer, deep learning, 020206 networking & telecommunications, LTE-advanced, LTE Advanced, Computer architecture, Telecommunications, Baseband, 020201 artificial intelligence & image processing, business, Centralized radio access network (C-RAN), 5G
Abstract

Centralized radio access network (C-RAN) is a network architecture that is emerging as a key technology enabler for 5G mobile networks as capacity demands for mobile traffic continue to proliferate. Essentially, C-RAN involves separating the remote radio heads from baseband units to be processed in the cloud. A systematic design of C-RAN involves mapping of individual baseband signal processing tasks to general purpose cloud infrastructures, such as the microserver to reduce the energy footprint. In this paper, we start with mapping the lowest protocol stack, i.e., the physical layer (PHY), which is characterized by strict latency and dynamic data rate. To achieve this, we explore the use of machine intelligence for energy-efficient mapping of PHY signal processing on microservers. Fundamental to this approach is: 1) the use of principal component analysis to represent workload from multi-dimensional hardware performance statistics, demonstrating 99.88% correlation with the critical PHY processing latency and 2) the use of deep learning to model latency and predict dynamic workload for on-demand resource allocation, resulting in up to 36% reduction in hardware usage. These principles are built into a cross-layer run-time framework, which adapts resource allocation in response to time-varying data rate, guaranteeing latency, and improving energy efficiency by up to 48% (average 28%).

Published
2018
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17. Exploiting mm-wave communications to boost the performance of industrial wireless networks

Author

Giuseppe Anastasi, Filippo Giannetti, Bruno Neri, and Sergio Saponara

Subjects
Engineering, HW design, Link modeling, Millimeter waves (mmW) Communications, Physical layer (PHY), Wireless industrial networks, Control and Systems Engineering, Computer Science Applications, Electrical and Electronic Engineering, Word error rate, 02 engineering and technology, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Wireless, Electronics, business.industry, Wireless network, 020208 electrical & electronic engineering, Physical layer, 020206 networking & telecommunications, Converters, Millimeter, business, Information Systems, Communication channel
Abstract

This work explores the potentiality of millimeter waves (mmW) as physical layer in industrial wireless networks. Innovative models and a link design method are proposed to achieve reliable communication, at a distance of tens of meters for a single hop, even in harsh environments. By exploiting the worldwide-free band of several GHz, available around 60 GHz, mmW links allow to achieve a performance boosting of up to two orders of magnitude, w.r.t. conventional sub-6-GHz wireless links, in indoor industrial environments. Time slotted channel hopping and frequency-diversity can be implemented with a large number of channels, and with high bit rate (several Mb/s per channel). This allows for robust networking of high data-rate sensors, such as cameras, radars, or laser scanners. Featuring a low bit error rate, mmW communication allows for low-latency link and large number of hops in networks with a large radius. Finally, it ensures interference separation from operating frequencies of electrical machines, switching converters, and other industrial wireless networks (e.g., 802.11 or 802.15). Implementation results for key HW blocks in low-cost technologies show the feasibility of mmW communication nodes with low-power and compact size.

Published
2017

18. Chip Error Pattern Analysis in IEEE 802.15.4

Author

Wu, Kaishun CSE, Tan, Haoyu, Ngan, Hoi Lun, Liu, Yunhuai, Ni, Lionel Ming-Shuan, Wu, Kaishun CSE, Tan, Haoyu, Ngan, Hoi Lun, Liu, Yunhuai, and Ni, Lionel Ming-Shuan

Abstract

IEEE 802.15.4 standard specifies physical layer (PHY) and medium access control (MAC) sublayer protocols for low-rate and low-power communication applications. In this protocol, every 4-bit symbol is encoded into a sequence of 32 chips that are actually transmitted over the air. The 32 chips as a whole is also called a pseudonoise code (PN-Code). Due to complex channel conditions such as attenuation and interference, the transmitted PN-Code will often be received with some PN-Code chips corrupted. In this paper, we conduct a systematic analysis on these errors occurring at chip level. We find that there are notable error patterns corresponding to different cases. We then show that recognizing these patterns enables us to identify the channel condition in great details. We believe that understanding what happened to the transmission in our way can potentially bring benefit to channel coding, routing, and error correction protocol design. Finally, we propose Simple Rule, a simple yet effective method based on the chip error patterns to infer the link condition with an accuracy of over 96 percent in our evaluations.

Published
2012

19. Chip Error Pattern Analysis in IEEE 802.15.4

Author

Wu, Kaishun, Tan, Haoyu, Ngan, Hoi Lun, Liu, Yunhuai, Ni, Lionel Ming-shuan, Wu, Kaishun, Tan, Haoyu, Ngan, Hoi Lun, Liu, Yunhuai, and Ni, Lionel Ming-shuan

Abstract

IEEE 802.15.4 standard specifies physical layer (PHY) and medium access control (MAC) sublayer protocols for low-rate and low-power communication applications. In this protocol, every 4-bit symbol is encoded into a sequence of 32 chips that are actually transmitted over the air. The 32 chips as a whole is also called a pseudonoise code (PN-Code). Due to complex channel conditions such as attenuation and interference, the transmitted PN-Code will often be received with some PN-Code chips corrupted. In this paper, we conduct a systematic analysis on these errors occurring at chip level. We find that there are notable error patterns corresponding to different cases. We then show that recognizing these patterns enables us to identify the channel condition in great details. We believe that understanding what happened to the transmission in our way can potentially bring benefit to channel coding, routing, and error correction protocol design. Finally, we propose Simple Rule, a simple yet effective method based on the chip error patterns to infer the link condition with an accuracy of over 96 percent in our evaluations.

Published
2012

20. Chip Error Pattern Analysis in IEEE 802.15.4

Author

Wu, Kaishun CSE, Tan, Haoyu, Ngan, Hoi Lun, Ni, Lionel Ming-Shuan, Wu, Kaishun CSE, Tan, Haoyu, Ngan, Hoi Lun, and Ni, Lionel Ming-Shuan

Abstract

IEEE 802.15.4 standard specifies physical layer (PHY) and medium access control (MAC) sublayer protocols for low-rate and low-power communication applications. In this protocol, every 4-bit symbol is encoded into a sequence of 32 chips that are actually transmitted over the air. The 32 chips as a whole is also called a pseudo-noise code (PN-Code). Due to complex channel conditions such as attenuation and interference, the transmitted PN-Code will often be received with some PN-Code chips corrupted. In this paper, we conduct a systematic analysis on these errors occurring at chip-level. We find that there are notable error patterns corresponding to different cases. Recognizing these patterns will enable us to identify the channel condition in great details. We believe that understanding what happened to the transmission in our setup can potentially bring benefit to channel coding, routing and error correction protocol design.

Published
2010

21. Chip Error Pattern Analysis in IEEE 802.15.4

Author

Wu, Kaishun, Tan, Haoyu, Ngan, Hoi Lun, Ni, Lionel Ming-Shuan, Wu, Kaishun, Tan, Haoyu, Ngan, Hoi Lun, and Ni, Lionel Ming-Shuan

Abstract

IEEE 802.15.4 standard specifies physical layer (PHY) and medium access control (MAC) sublayer protocols for low-rate and low-power communication applications. In this protocol, every 4-bit symbol is encoded into a sequence of 32 chips that are actually transmitted over the air. The 32 chips as a whole is also called a pseudo-noise code (PN-Code). Due to complex channel conditions such as attenuation and interference, the transmitted PN-Code will often be received with some PN-Code chips corrupted. In this paper, we conduct a systematic analysis on these errors occurring at chip-level. We find that there are notable error patterns corresponding to different cases. Recognizing these patterns will enable us to identify the channel condition in great details. We believe that understanding what happened to the transmission in our setup can potentially bring benefit to channel coding, routing and error correction protocol design.

Published
2010

22. Využití sítě WLAN pro detekci lidské aktivity uvnitř budov

Author

Miloš, Jiří, Vašina, Petr, Sekanina, Tomáš, Miloš, Jiří, Vašina, Petr, and Sekanina, Tomáš

Abstract

Bakalářská práce představuje možnosti využití sítě WLAN a bezdrátový komunikační standard IEEE 802.11n na detekci objektů nebo lidské aktivity v místnosti pro různé měřicí scénáře. Práce obsahuje teoretický popis sítě WLAN a rodiny standardů IEEE 802.11 s detailním zaměřením na standard IEEE 802.11n, respektive na jeho fyzickou vrstvu. Určitá pozornost je tu věnována i popisu šíření vln uvnitř budov. Dále popis měřicí Wi-Fi karty INTEL 5300, nástroje CSI Tool 802.11n a ovládání měřicí karty v prostředí Linux. V praktické části je demonstrována analýza paketů přenášených pomocí standardu 802.11n v módu vysoké propustnosti. Výsledky měření detekce objektů a aktivity v místnosti jsou exportovány do programového prostředí MATLAB, kde jsou analyzovány. Výsledky experimentů jsou diskutovány v závěru., Bachelor thesis represents possibilities of use WLAN network and standard IEEE 802.11n for object or human detection in a room with different scenarios. Bachelor thesis includes a theoretical description of WLAN network and family of WLAN standards IEEE 802.11 with detailed focus on standard IEEE 802.11n and its physical layer. Attention is also paid to the wave propagation inside buildings. It also includes description of measuring Wi-Fi INTEL 5300 NIC, CSI Tool 802.11n and controlling measuring NIC in operating system Linux. In practical part is demonstrated analysis of high-throughput packets using standard 802.11n. Results of measurement of object and human detection in a room are exported to programming language MATLAB and there are analyzed. Results of experiments are discussed in conclusion of bachelor thesis.

23. Implementace standardu IEEE 802.11ah pro přenos M2M dat

Author

Mašek, Pavel, Fujdiak, Radek, Masár, Marek, Mašek, Pavel, Fujdiak, Radek, and Masár, Marek

Abstract

Táto diplomová práca sa zaoberá implementáciou štandardu IEEE 802.11ah do sieťového simulátora NS-3 (Network Simulator). V úvodnej časti diplomovej práce je opísaná M2M komunikácia, na ktorú by bol štandard IEEE 802.11ah vhodný. M2M komunikácia sa postupne viacej využíva v spoločnosti, preto je snaha o vytvorenie nového štandardu na tento typ komunikácie. V práci je uvedená charakteristika tohto štandardu na základe dosiaľ dostupných špecifikácií, ktoré vydáva skupina TGah (Task Group ah). V tejto práci sú vykonané zmeny v NS-3 na podporu tohto štandardu. Následne je vytvorený scenár so základnou topológiou v NS-3 s využitím štandardu IEEE 802.11ah, kde sa testuje funkčnosť štandardu. Výsledkom práce je opis vykonaných zmien a analýza výstupných súborov vytvorených v rámci simulácie., This diploma thesis deals with the implementation of standard IEEE 802.11ah into network simulator NS-3. The first part of the diploma thesis describes M2M communication for which the standard IEEE 802.11ah would be suitable. M2M communication is being more and more used in the society, that is why there is an effort to develop a new standard for this type of communication. The thesis contains a description of this standard based on technical specifications brought out by the Task Group ah (TGah). Some changes have been made in NS-3 for the purpose of this thesis in order to support this standard. In the next part there is a created scenario with basic topology in NS-3 with usage of standard IEEE 802.11ah, in which the functionality of the standard is tested. The result of this diploma thesis is a description of the changes which have been made and analysis of the output files from the simulation.

24. Zpracování signálů v systému ZigBee

Author

Hanus, Stanislav, Bradáč, Zdeněk, Miloš, Jiří, Hanus, Stanislav, Bradáč, Zdeněk, and Miloš, Jiří

Abstract

Diplomová práce na téma Zpracování signálů v systému ZigBee je zaměřena na vlastnosti fyzické vrstvy systému ZigBee (standard IEEE 802.15.4 - 2003). Práce se skládá ze tří částí. První část obsahuje obecný náhled na použití a vlastnosti systému. Druhá část se zaměřuje na vrstvu řízení přístupu k fyzickému médiu a detailně pak na fyzickou vrstvu systému ZigBee. Zde je popsáno zpracování signálů v jednotlivých rádiových pásmech. V poslední části práce je detailně popsán vytvořený model systému v programovém prostředí MATLAB pro frekvenční pásmo 868/915 MHz resp. 2450 MHz. Poslední část práce se věnuje simulacím BER v závislosti na poměru C/N. Vyšetřena je rovněž koexistence se systémy pracujícími ve stejném nebo blízkém kmitočtovém pásmu. Na základě výsledků simulací jsou v práci uvedeny doporučení pro minimalizaci bitové chybovosti při používání systému ZigBee., Master's thesis The Signal Processing in ZigBee System is focused on properties of Physical Layer of ZigBee (standard IEEE 802.15.4 - 2003). The work consists of three parts. The first part contains common view on using and properties of ZigBee. The next part focuses on the Medium Access Control Layer and in detail on the Physical Layer. There described signal processing in the Physical Layer in individual radio bands. The last part of the project contains the process of modeling in the MATLAB for both models of system ZigBee (bands 868/915 MHz and 2450 MHz). The last part of thesis deals with the simulations of BER depending on Carrier-to-Noise Ratio. Also examined the coexistence of systems operating in the same or a nearby frequency band. Based on the results of simulations there are given recommendations for the use of the ZigBee system in minimizing BER.

25. Implementace standardu IEEE 802.11ah pro přenos M2M dat

Author

Mašek, Pavel, Fujdiak, Radek, Masár, Marek, Mašek, Pavel, Fujdiak, Radek, and Masár, Marek

Abstract

Táto diplomová práca sa zaoberá implementáciou štandardu IEEE 802.11ah do sieťového simulátora NS-3 (Network Simulator). V úvodnej časti diplomovej práce je opísaná M2M komunikácia, na ktorú by bol štandard IEEE 802.11ah vhodný. M2M komunikácia sa postupne viacej využíva v spoločnosti, preto je snaha o vytvorenie nového štandardu na tento typ komunikácie. V práci je uvedená charakteristika tohto štandardu na základe dosiaľ dostupných špecifikácií, ktoré vydáva skupina TGah (Task Group ah). V tejto práci sú vykonané zmeny v NS-3 na podporu tohto štandardu. Následne je vytvorený scenár so základnou topológiou v NS-3 s využitím štandardu IEEE 802.11ah, kde sa testuje funkčnosť štandardu. Výsledkom práce je opis vykonaných zmien a analýza výstupných súborov vytvorených v rámci simulácie., This diploma thesis deals with the implementation of standard IEEE 802.11ah into network simulator NS-3. The first part of the diploma thesis describes M2M communication for which the standard IEEE 802.11ah would be suitable. M2M communication is being more and more used in the society, that is why there is an effort to develop a new standard for this type of communication. The thesis contains a description of this standard based on technical specifications brought out by the Task Group ah (TGah). Some changes have been made in NS-3 for the purpose of this thesis in order to support this standard. In the next part there is a created scenario with basic topology in NS-3 with usage of standard IEEE 802.11ah, in which the functionality of the standard is tested. The result of this diploma thesis is a description of the changes which have been made and analysis of the output files from the simulation.

26. Využití sítě WLAN pro detekci lidské aktivity uvnitř budov

Author

Miloš, Jiří, Vašina, Petr, Sekanina, Tomáš, Miloš, Jiří, Vašina, Petr, and Sekanina, Tomáš

Abstract

Bakalářská práce představuje možnosti využití sítě WLAN a bezdrátový komunikační standard IEEE 802.11n na detekci objektů nebo lidské aktivity v místnosti pro různé měřicí scénáře. Práce obsahuje teoretický popis sítě WLAN a rodiny standardů IEEE 802.11 s detailním zaměřením na standard IEEE 802.11n, respektive na jeho fyzickou vrstvu. Určitá pozornost je tu věnována i popisu šíření vln uvnitř budov. Dále popis měřicí Wi-Fi karty INTEL 5300, nástroje CSI Tool 802.11n a ovládání měřicí karty v prostředí Linux. V praktické části je demonstrována analýza paketů přenášených pomocí standardu 802.11n v módu vysoké propustnosti. Výsledky měření detekce objektů a aktivity v místnosti jsou exportovány do programového prostředí MATLAB, kde jsou analyzovány. Výsledky experimentů jsou diskutovány v závěru., Bachelor thesis represents possibilities of use WLAN network and standard IEEE 802.11n for object or human detection in a room with different scenarios. Bachelor thesis includes a theoretical description of WLAN network and family of WLAN standards IEEE 802.11 with detailed focus on standard IEEE 802.11n and its physical layer. Attention is also paid to the wave propagation inside buildings. It also includes description of measuring Wi-Fi INTEL 5300 NIC, CSI Tool 802.11n and controlling measuring NIC in operating system Linux. In practical part is demonstrated analysis of high-throughput packets using standard 802.11n. Results of measurement of object and human detection in a room are exported to programming language MATLAB and there are analyzed. Results of experiments are discussed in conclusion of bachelor thesis.

27. Implementace standardu IEEE 802.11ah pro přenos M2M dat

Author

Mašek, Pavel, Fujdiak, Radek, Masár, Marek, Mašek, Pavel, Fujdiak, Radek, and Masár, Marek

Abstract

Táto diplomová práca sa zaoberá implementáciou štandardu IEEE 802.11ah do sieťového simulátora NS-3 (Network Simulator). V úvodnej časti diplomovej práce je opísaná M2M komunikácia, na ktorú by bol štandard IEEE 802.11ah vhodný. M2M komunikácia sa postupne viacej využíva v spoločnosti, preto je snaha o vytvorenie nového štandardu na tento typ komunikácie. V práci je uvedená charakteristika tohto štandardu na základe dosiaľ dostupných špecifikácií, ktoré vydáva skupina TGah (Task Group ah). V tejto práci sú vykonané zmeny v NS-3 na podporu tohto štandardu. Následne je vytvorený scenár so základnou topológiou v NS-3 s využitím štandardu IEEE 802.11ah, kde sa testuje funkčnosť štandardu. Výsledkom práce je opis vykonaných zmien a analýza výstupných súborov vytvorených v rámci simulácie., This diploma thesis deals with the implementation of standard IEEE 802.11ah into network simulator NS-3. The first part of the diploma thesis describes M2M communication for which the standard IEEE 802.11ah would be suitable. M2M communication is being more and more used in the society, that is why there is an effort to develop a new standard for this type of communication. The thesis contains a description of this standard based on technical specifications brought out by the Task Group ah (TGah). Some changes have been made in NS-3 for the purpose of this thesis in order to support this standard. In the next part there is a created scenario with basic topology in NS-3 with usage of standard IEEE 802.11ah, in which the functionality of the standard is tested. The result of this diploma thesis is a description of the changes which have been made and analysis of the output files from the simulation.

28. Implementace standardu IEEE 802.11ah pro přenos M2M dat

Author

Mašek, Pavel, Fujdiak, Radek, Mašek, Pavel, and Fujdiak, Radek

Abstract

Táto diplomová práca sa zaoberá implementáciou štandardu IEEE 802.11ah do sieťového simulátora NS-3 (Network Simulator). V úvodnej časti diplomovej práce je opísaná M2M komunikácia, na ktorú by bol štandard IEEE 802.11ah vhodný. M2M komunikácia sa postupne viacej využíva v spoločnosti, preto je snaha o vytvorenie nového štandardu na tento typ komunikácie. V práci je uvedená charakteristika tohto štandardu na základe dosiaľ dostupných špecifikácií, ktoré vydáva skupina TGah (Task Group ah). V tejto práci sú vykonané zmeny v NS-3 na podporu tohto štandardu. Následne je vytvorený scenár so základnou topológiou v NS-3 s využitím štandardu IEEE 802.11ah, kde sa testuje funkčnosť štandardu. Výsledkom práce je opis vykonaných zmien a analýza výstupných súborov vytvorených v rámci simulácie., This diploma thesis deals with the implementation of standard IEEE 802.11ah into network simulator NS-3. The first part of the diploma thesis describes M2M communication for which the standard IEEE 802.11ah would be suitable. M2M communication is being more and more used in the society, that is why there is an effort to develop a new standard for this type of communication. The thesis contains a description of this standard based on technical specifications brought out by the Task Group ah (TGah). Some changes have been made in NS-3 for the purpose of this thesis in order to support this standard. In the next part there is a created scenario with basic topology in NS-3 with usage of standard IEEE 802.11ah, in which the functionality of the standard is tested. The result of this diploma thesis is a description of the changes which have been made and analysis of the output files from the simulation.

29. Využití sítě WLAN pro detekci lidské aktivity uvnitř budov

Author

Miloš, Jiří, Vašina, Petr, Miloš, Jiří, and Vašina, Petr

Abstract

Bakalářská práce představuje možnosti využití sítě WLAN a bezdrátový komunikační standard IEEE 802.11n na detekci objektů nebo lidské aktivity v místnosti pro různé měřicí scénáře. Práce obsahuje teoretický popis sítě WLAN a rodiny standardů IEEE 802.11 s detailním zaměřením na standard IEEE 802.11n, respektive na jeho fyzickou vrstvu. Určitá pozornost je tu věnována i popisu šíření vln uvnitř budov. Dále popis měřicí Wi-Fi karty INTEL 5300, nástroje CSI Tool 802.11n a ovládání měřicí karty v prostředí Linux. V praktické části je demonstrována analýza paketů přenášených pomocí standardu 802.11n v módu vysoké propustnosti. Výsledky měření detekce objektů a aktivity v místnosti jsou exportovány do programového prostředí MATLAB, kde jsou analyzovány. Výsledky experimentů jsou diskutovány v závěru., Bachelor thesis represents possibilities of use WLAN network and standard IEEE 802.11n for object or human detection in a room with different scenarios. Bachelor thesis includes a theoretical description of WLAN network and family of WLAN standards IEEE 802.11 with detailed focus on standard IEEE 802.11n and its physical layer. Attention is also paid to the wave propagation inside buildings. It also includes description of measuring Wi-Fi INTEL 5300 NIC, CSI Tool 802.11n and controlling measuring NIC in operating system Linux. In practical part is demonstrated analysis of high-throughput packets using standard 802.11n. Results of measurement of object and human detection in a room are exported to programming language MATLAB and there are analyzed. Results of experiments are discussed in conclusion of bachelor thesis.

30. Implementace standardu IEEE 802.11ah pro přenos M2M dat

Author

Mašek, Pavel, Fujdiak, Radek, Mašek, Pavel, and Fujdiak, Radek

Abstract

Táto diplomová práca sa zaoberá implementáciou štandardu IEEE 802.11ah do sieťového simulátora NS-3 (Network Simulator). V úvodnej časti diplomovej práce je opísaná M2M komunikácia, na ktorú by bol štandard IEEE 802.11ah vhodný. M2M komunikácia sa postupne viacej využíva v spoločnosti, preto je snaha o vytvorenie nového štandardu na tento typ komunikácie. V práci je uvedená charakteristika tohto štandardu na základe dosiaľ dostupných špecifikácií, ktoré vydáva skupina TGah (Task Group ah). V tejto práci sú vykonané zmeny v NS-3 na podporu tohto štandardu. Následne je vytvorený scenár so základnou topológiou v NS-3 s využitím štandardu IEEE 802.11ah, kde sa testuje funkčnosť štandardu. Výsledkom práce je opis vykonaných zmien a analýza výstupných súborov vytvorených v rámci simulácie., This diploma thesis deals with the implementation of standard IEEE 802.11ah into network simulator NS-3. The first part of the diploma thesis describes M2M communication for which the standard IEEE 802.11ah would be suitable. M2M communication is being more and more used in the society, that is why there is an effort to develop a new standard for this type of communication. The thesis contains a description of this standard based on technical specifications brought out by the Task Group ah (TGah). Some changes have been made in NS-3 for the purpose of this thesis in order to support this standard. In the next part there is a created scenario with basic topology in NS-3 with usage of standard IEEE 802.11ah, in which the functionality of the standard is tested. The result of this diploma thesis is a description of the changes which have been made and analysis of the output files from the simulation.

31. Využití sítě WLAN pro detekci lidské aktivity uvnitř budov

Author

Miloš, Jiří, Vašina, Petr, Miloš, Jiří, and Vašina, Petr

Abstract

Bakalářská práce představuje možnosti využití sítě WLAN a bezdrátový komunikační standard IEEE 802.11n na detekci objektů nebo lidské aktivity v místnosti pro různé měřicí scénáře. Práce obsahuje teoretický popis sítě WLAN a rodiny standardů IEEE 802.11 s detailním zaměřením na standard IEEE 802.11n, respektive na jeho fyzickou vrstvu. Určitá pozornost je tu věnována i popisu šíření vln uvnitř budov. Dále popis měřicí Wi-Fi karty INTEL 5300, nástroje CSI Tool 802.11n a ovládání měřicí karty v prostředí Linux. V praktické části je demonstrována analýza paketů přenášených pomocí standardu 802.11n v módu vysoké propustnosti. Výsledky měření detekce objektů a aktivity v místnosti jsou exportovány do programového prostředí MATLAB, kde jsou analyzovány. Výsledky experimentů jsou diskutovány v závěru., Bachelor thesis represents possibilities of use WLAN network and standard IEEE 802.11n for object or human detection in a room with different scenarios. Bachelor thesis includes a theoretical description of WLAN network and family of WLAN standards IEEE 802.11 with detailed focus on standard IEEE 802.11n and its physical layer. Attention is also paid to the wave propagation inside buildings. It also includes description of measuring Wi-Fi INTEL 5300 NIC, CSI Tool 802.11n and controlling measuring NIC in operating system Linux. In practical part is demonstrated analysis of high-throughput packets using standard 802.11n. Results of measurement of object and human detection in a room are exported to programming language MATLAB and there are analyzed. Results of experiments are discussed in conclusion of bachelor thesis.

32. Zpracování signálů v systému ZigBee

Author

Hanus, Stanislav, Bradáč, Zdeněk, Hanus, Stanislav, and Bradáč, Zdeněk

Abstract

Diplomová práce na téma Zpracování signálů v systému ZigBee je zaměřena na vlastnosti fyzické vrstvy systému ZigBee (standard IEEE 802.15.4 - 2003). Práce se skládá ze tří částí. První část obsahuje obecný náhled na použití a vlastnosti systému. Druhá část se zaměřuje na vrstvu řízení přístupu k fyzickému médiu a detailně pak na fyzickou vrstvu systému ZigBee. Zde je popsáno zpracování signálů v jednotlivých rádiových pásmech. V poslední části práce je detailně popsán vytvořený model systému v programovém prostředí MATLAB pro frekvenční pásmo 868/915 MHz resp. 2450 MHz. Poslední část práce se věnuje simulacím BER v závislosti na poměru C/N. Vyšetřena je rovněž koexistence se systémy pracujícími ve stejném nebo blízkém kmitočtovém pásmu. Na základě výsledků simulací jsou v práci uvedeny doporučení pro minimalizaci bitové chybovosti při používání systému ZigBee., Master's thesis The Signal Processing in ZigBee System is focused on properties of Physical Layer of ZigBee (standard IEEE 802.15.4 - 2003). The work consists of three parts. The first part contains common view on using and properties of ZigBee. The next part focuses on the Medium Access Control Layer and in detail on the Physical Layer. There described signal processing in the Physical Layer in individual radio bands. The last part of the project contains the process of modeling in the MATLAB for both models of system ZigBee (bands 868/915 MHz and 2450 MHz). The last part of thesis deals with the simulations of BER depending on Carrier-to-Noise Ratio. Also examined the coexistence of systems operating in the same or a nearby frequency band. Based on the results of simulations there are given recommendations for the use of the ZigBee system in minimizing BER.

33. Implementace standardu IEEE 802.11ah pro přenos M2M dat

Author

Mašek, Pavel, Fujdiak, Radek, Mašek, Pavel, and Fujdiak, Radek

Abstract

Táto diplomová práca sa zaoberá implementáciou štandardu IEEE 802.11ah do sieťového simulátora NS-3 (Network Simulator). V úvodnej časti diplomovej práce je opísaná M2M komunikácia, na ktorú by bol štandard IEEE 802.11ah vhodný. M2M komunikácia sa postupne viacej využíva v spoločnosti, preto je snaha o vytvorenie nového štandardu na tento typ komunikácie. V práci je uvedená charakteristika tohto štandardu na základe dosiaľ dostupných špecifikácií, ktoré vydáva skupina TGah (Task Group ah). V tejto práci sú vykonané zmeny v NS-3 na podporu tohto štandardu. Následne je vytvorený scenár so základnou topológiou v NS-3 s využitím štandardu IEEE 802.11ah, kde sa testuje funkčnosť štandardu. Výsledkom práce je opis vykonaných zmien a analýza výstupných súborov vytvorených v rámci simulácie., This diploma thesis deals with the implementation of standard IEEE 802.11ah into network simulator NS-3. The first part of the diploma thesis describes M2M communication for which the standard IEEE 802.11ah would be suitable. M2M communication is being more and more used in the society, that is why there is an effort to develop a new standard for this type of communication. The thesis contains a description of this standard based on technical specifications brought out by the Task Group ah (TGah). Some changes have been made in NS-3 for the purpose of this thesis in order to support this standard. In the next part there is a created scenario with basic topology in NS-3 with usage of standard IEEE 802.11ah, in which the functionality of the standard is tested. The result of this diploma thesis is a description of the changes which have been made and analysis of the output files from the simulation.

34. Využití sítě WLAN pro detekci lidské aktivity uvnitř budov

Author

Miloš, Jiří, Vašina, Petr, Miloš, Jiří, and Vašina, Petr

Abstract

Bakalářská práce představuje možnosti využití sítě WLAN a bezdrátový komunikační standard IEEE 802.11n na detekci objektů nebo lidské aktivity v místnosti pro různé měřicí scénáře. Práce obsahuje teoretický popis sítě WLAN a rodiny standardů IEEE 802.11 s detailním zaměřením na standard IEEE 802.11n, respektive na jeho fyzickou vrstvu. Určitá pozornost je tu věnována i popisu šíření vln uvnitř budov. Dále popis měřicí Wi-Fi karty INTEL 5300, nástroje CSI Tool 802.11n a ovládání měřicí karty v prostředí Linux. V praktické části je demonstrována analýza paketů přenášených pomocí standardu 802.11n v módu vysoké propustnosti. Výsledky měření detekce objektů a aktivity v místnosti jsou exportovány do programového prostředí MATLAB, kde jsou analyzovány. Výsledky experimentů jsou diskutovány v závěru., Bachelor thesis represents possibilities of use WLAN network and standard IEEE 802.11n for object or human detection in a room with different scenarios. Bachelor thesis includes a theoretical description of WLAN network and family of WLAN standards IEEE 802.11 with detailed focus on standard IEEE 802.11n and its physical layer. Attention is also paid to the wave propagation inside buildings. It also includes description of measuring Wi-Fi INTEL 5300 NIC, CSI Tool 802.11n and controlling measuring NIC in operating system Linux. In practical part is demonstrated analysis of high-throughput packets using standard 802.11n. Results of measurement of object and human detection in a room are exported to programming language MATLAB and there are analyzed. Results of experiments are discussed in conclusion of bachelor thesis.

35. Zpracování signálů v systému ZigBee

Author

Hanus, Stanislav, Bradáč, Zdeněk, Hanus, Stanislav, and Bradáč, Zdeněk

Abstract

Diplomová práce na téma Zpracování signálů v systému ZigBee je zaměřena na vlastnosti fyzické vrstvy systému ZigBee (standard IEEE 802.15.4 - 2003). Práce se skládá ze tří částí. První část obsahuje obecný náhled na použití a vlastnosti systému. Druhá část se zaměřuje na vrstvu řízení přístupu k fyzickému médiu a detailně pak na fyzickou vrstvu systému ZigBee. Zde je popsáno zpracování signálů v jednotlivých rádiových pásmech. V poslední části práce je detailně popsán vytvořený model systému v programovém prostředí MATLAB pro frekvenční pásmo 868/915 MHz resp. 2450 MHz. Poslední část práce se věnuje simulacím BER v závislosti na poměru C/N. Vyšetřena je rovněž koexistence se systémy pracujícími ve stejném nebo blízkém kmitočtovém pásmu. Na základě výsledků simulací jsou v práci uvedeny doporučení pro minimalizaci bitové chybovosti při používání systému ZigBee., Master's thesis The Signal Processing in ZigBee System is focused on properties of Physical Layer of ZigBee (standard IEEE 802.15.4 - 2003). The work consists of three parts. The first part contains common view on using and properties of ZigBee. The next part focuses on the Medium Access Control Layer and in detail on the Physical Layer. There described signal processing in the Physical Layer in individual radio bands. The last part of the project contains the process of modeling in the MATLAB for both models of system ZigBee (bands 868/915 MHz and 2450 MHz). The last part of thesis deals with the simulations of BER depending on Carrier-to-Noise Ratio. Also examined the coexistence of systems operating in the same or a nearby frequency band. Based on the results of simulations there are given recommendations for the use of the ZigBee system in minimizing BER.

36. Implementace standardu IEEE 802.11ah pro přenos M2M dat

Author

Mašek, Pavel, Fujdiak, Radek, Mašek, Pavel, and Fujdiak, Radek

Abstract

Táto diplomová práca sa zaoberá implementáciou štandardu IEEE 802.11ah do sieťového simulátora NS-3 (Network Simulator). V úvodnej časti diplomovej práce je opísaná M2M komunikácia, na ktorú by bol štandard IEEE 802.11ah vhodný. M2M komunikácia sa postupne viacej využíva v spoločnosti, preto je snaha o vytvorenie nového štandardu na tento typ komunikácie. V práci je uvedená charakteristika tohto štandardu na základe dosiaľ dostupných špecifikácií, ktoré vydáva skupina TGah (Task Group ah). V tejto práci sú vykonané zmeny v NS-3 na podporu tohto štandardu. Následne je vytvorený scenár so základnou topológiou v NS-3 s využitím štandardu IEEE 802.11ah, kde sa testuje funkčnosť štandardu. Výsledkom práce je opis vykonaných zmien a analýza výstupných súborov vytvorených v rámci simulácie., This diploma thesis deals with the implementation of standard IEEE 802.11ah into network simulator NS-3. The first part of the diploma thesis describes M2M communication for which the standard IEEE 802.11ah would be suitable. M2M communication is being more and more used in the society, that is why there is an effort to develop a new standard for this type of communication. The thesis contains a description of this standard based on technical specifications brought out by the Task Group ah (TGah). Some changes have been made in NS-3 for the purpose of this thesis in order to support this standard. In the next part there is a created scenario with basic topology in NS-3 with usage of standard IEEE 802.11ah, in which the functionality of the standard is tested. The result of this diploma thesis is a description of the changes which have been made and analysis of the output files from the simulation.

37. Implementace standardu IEEE 802.11ah pro přenos M2M dat

Author

Mašek, Pavel, Fujdiak, Radek, Mašek, Pavel, and Fujdiak, Radek

Abstract

Táto diplomová práca sa zaoberá implementáciou štandardu IEEE 802.11ah do sieťového simulátora NS-3 (Network Simulator). V úvodnej časti diplomovej práce je opísaná M2M komunikácia, na ktorú by bol štandard IEEE 802.11ah vhodný. M2M komunikácia sa postupne viacej využíva v spoločnosti, preto je snaha o vytvorenie nového štandardu na tento typ komunikácie. V práci je uvedená charakteristika tohto štandardu na základe dosiaľ dostupných špecifikácií, ktoré vydáva skupina TGah (Task Group ah). V tejto práci sú vykonané zmeny v NS-3 na podporu tohto štandardu. Následne je vytvorený scenár so základnou topológiou v NS-3 s využitím štandardu IEEE 802.11ah, kde sa testuje funkčnosť štandardu. Výsledkom práce je opis vykonaných zmien a analýza výstupných súborov vytvorených v rámci simulácie., This diploma thesis deals with the implementation of standard IEEE 802.11ah into network simulator NS-3. The first part of the diploma thesis describes M2M communication for which the standard IEEE 802.11ah would be suitable. M2M communication is being more and more used in the society, that is why there is an effort to develop a new standard for this type of communication. The thesis contains a description of this standard based on technical specifications brought out by the Task Group ah (TGah). Some changes have been made in NS-3 for the purpose of this thesis in order to support this standard. In the next part there is a created scenario with basic topology in NS-3 with usage of standard IEEE 802.11ah, in which the functionality of the standard is tested. The result of this diploma thesis is a description of the changes which have been made and analysis of the output files from the simulation.

38. Zpracování signálů v systému ZigBee

Author

Hanus, Stanislav, Bradáč, Zdeněk, Miloš, Jiří, Hanus, Stanislav, Bradáč, Zdeněk, and Miloš, Jiří

Abstract

Diplomová práce na téma Zpracování signálů v systému ZigBee je zaměřena na vlastnosti fyzické vrstvy systému ZigBee (standard IEEE 802.15.4 - 2003). Práce se skládá ze tří částí. První část obsahuje obecný náhled na použití a vlastnosti systému. Druhá část se zaměřuje na vrstvu řízení přístupu k fyzickému médiu a detailně pak na fyzickou vrstvu systému ZigBee. Zde je popsáno zpracování signálů v jednotlivých rádiových pásmech. V poslední části práce je detailně popsán vytvořený model systému v programovém prostředí MATLAB pro frekvenční pásmo 868/915 MHz resp. 2450 MHz. Poslední část práce se věnuje simulacím BER v závislosti na poměru C/N. Vyšetřena je rovněž koexistence se systémy pracujícími ve stejném nebo blízkém kmitočtovém pásmu. Na základě výsledků simulací jsou v práci uvedeny doporučení pro minimalizaci bitové chybovosti při používání systému ZigBee., Master's thesis The Signal Processing in ZigBee System is focused on properties of Physical Layer of ZigBee (standard IEEE 802.15.4 - 2003). The work consists of three parts. The first part contains common view on using and properties of ZigBee. The next part focuses on the Medium Access Control Layer and in detail on the Physical Layer. There described signal processing in the Physical Layer in individual radio bands. The last part of the project contains the process of modeling in the MATLAB for both models of system ZigBee (bands 868/915 MHz and 2450 MHz). The last part of thesis deals with the simulations of BER depending on Carrier-to-Noise Ratio. Also examined the coexistence of systems operating in the same or a nearby frequency band. Based on the results of simulations there are given recommendations for the use of the ZigBee system in minimizing BER.

39. Implementace standardu IEEE 802.11ah pro přenos M2M dat

Author

Mašek, Pavel, Fujdiak, Radek, Masár, Marek, Mašek, Pavel, Fujdiak, Radek, and Masár, Marek

Abstract

Táto diplomová práca sa zaoberá implementáciou štandardu IEEE 802.11ah do sieťového simulátora NS-3 (Network Simulator). V úvodnej časti diplomovej práce je opísaná M2M komunikácia, na ktorú by bol štandard IEEE 802.11ah vhodný. M2M komunikácia sa postupne viacej využíva v spoločnosti, preto je snaha o vytvorenie nového štandardu na tento typ komunikácie. V práci je uvedená charakteristika tohto štandardu na základe dosiaľ dostupných špecifikácií, ktoré vydáva skupina TGah (Task Group ah). V tejto práci sú vykonané zmeny v NS-3 na podporu tohto štandardu. Následne je vytvorený scenár so základnou topológiou v NS-3 s využitím štandardu IEEE 802.11ah, kde sa testuje funkčnosť štandardu. Výsledkom práce je opis vykonaných zmien a analýza výstupných súborov vytvorených v rámci simulácie., This diploma thesis deals with the implementation of standard IEEE 802.11ah into network simulator NS-3. The first part of the diploma thesis describes M2M communication for which the standard IEEE 802.11ah would be suitable. M2M communication is being more and more used in the society, that is why there is an effort to develop a new standard for this type of communication. The thesis contains a description of this standard based on technical specifications brought out by the Task Group ah (TGah). Some changes have been made in NS-3 for the purpose of this thesis in order to support this standard. In the next part there is a created scenario with basic topology in NS-3 with usage of standard IEEE 802.11ah, in which the functionality of the standard is tested. The result of this diploma thesis is a description of the changes which have been made and analysis of the output files from the simulation.

40. SECURE PERFORMANCE ANALYSIS OF ADAPTIVE ENERGY HARVESTING ENABLED RELAYING NETWORKS

Author

NGUYEN XUAN VIET, DAO THI THU THUY, LE SI PHU, NGUYEN HONG NHU, NGO TIEN HOA, DINH-THUAN DO, and MIROSLAV VOZNAK

Subjects
Physical layer (PHY), lcsh:TA1-2040, Cooperative jamming dual hop, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, lcsh:Technology (General), Computer Science::Networking and Internet Architecture, Security, lcsh:T1-995, Data_CODINGANDINFORMATIONTHEORY, Outage probability, lcsh:Engineering (General). Civil engineering (General), Computer Science::Cryptography and Security, Computer Science::Information Theory
Abstract

In this paper, the impact of the jamming signal on the secrecy performance of Energy Harvesting (EH) enabled dual-hop amplify-and-forward relaying network is investigated. First, the security outage probability analysis is studied for conventional networks under a single passive eavesdropper attack. Then, the outage performance analysis in two cases regarding energy harvesting is investigated. Moreover, the proposed work enhances Physical Layer (PHY) security performance of two-hop relaying model using Cooperative Jamming Dual-Hop Techniques (CJDH). For this purpose, new closed-form expressions are derived for the outage probability of CJDH model in the presence of interference over Rayleigh fading channels. A power allocation optimization problem for energy harvesting protocol is formulated and solved for enhancing the system security. The derived analytical formulas herein are supported by numerical and simulation results to clarify the main contributions of the paper.

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