33 research outputs found
High-Throughput Covert Channels in Adaptive Rate Wireless Communication Systems
In this paper, we outline a novel, forward error correction-based information hiding technique for adaptive rate wireless communication systems. Specifically, we propose lever- aging the functionality of wireless local area network modulation and coding schemes (MCS) and link adaptation mechanisms to significantly increase covert channel throughput. After describing our generalized information hiding model, we detail implementa- tion of this technique within the IEEE 802.11ad, directional multi- Gigabit standard. Simulation results demonstrate the potential of the proposed techniques to develop reliable, high-throughput covert channels under multiple MCS rates and embedding techniques. Covert channel performance is evaluated in terms of the observed packet error ratio of the underlying communication system as well as the bit error ratio of the hidden data
Evaluation of IEEE 802.11ad for mmWave V2V Communications
Autonomous vehicles can construct a more accurate perception of their
surrounding environment by exchanging rich sensor data with nearby vehicles.
Such exchange can require larger bandwidths than currently provided by
ITS-G5/DSRC and Cellular V2X. Millimeter wave (mmWave) communications can
provide higher bandwidth and could complement current V2X standards. Recent
studies have started investigating the potential of IEEE 802.11ad to support
high bandwidth vehicular communications. This paper introduces the first
performance evaluation of the IEEE 802.11ad MAC (Medium Access Control) and
beamforming mechanism for mmWave V2V communications. The study highlights
existing opportunities and shortcomings that should guide the development of
mmWave communications for V2V communications.Comment: 6 pages, 5 figures, 1 tabl
An Overview on IEEE 802.11bf: WLAN Sensing
With recent advancements, the wireless local area network (WLAN) or wireless
fidelity (Wi-Fi) technology has been successfully utilized to realize sensing
functionalities such as detection, localization, and recognition. However, the
WLANs standards are developed mainly for the purpose of communication, and thus
may not be able to meet the stringent requirements for emerging sensing
applications. To resolve this issue, a new Task Group (TG), namely IEEE
802.11bf, has been established by the IEEE 802.11 working group, with the
objective of creating a new amendment to the WLAN standard to meet advanced
sensing requirements while minimizing the effect on communications. This paper
provides a comprehensive overview on the up-to-date efforts in the IEEE
802.11bf TG. First, we introduce the definition of the 802.11bf amendment and
its formation and standardization timeline. Next, we discuss the WLAN sensing
use cases with the corresponding key performance indicator (KPI) requirements.
After reviewing previous WLAN sensing research based on communication-oriented
WLAN standards, we identify their limitations and underscore the practical need
for the new sensing-oriented amendment in 802.11bf. Furthermore, we discuss the
WLAN sensing framework and procedure used for measurement acquisition, by
considering both sensing at sub-7GHz and directional multi-gigabit (DMG)
sensing at 60 GHz, respectively, and address their shared features,
similarities, and differences. In addition, we present various candidate
technical features for IEEE 802.11bf, including waveform/sequence design,
feedback types, as well as quantization and compression techniques. We also
describe the methodologies and the channel modeling used by the IEEE 802.11bf
TG for evaluation. Finally, we discuss the challenges and future research
directions to motivate more research endeavors towards this field in details.Comment: 31 pages, 25 figures, this is a significant updated version of
arXiv:2207.0485
Capacity Estimation for Error Correction Code-based Embedding in Adaptive Rate Wireless Communication Systems
In this paper, we explore the performance of error correction code-based embedding in adaptive rate wireless communication systems. We first develop a model to illustrate the relationship between the selected modulation and coding scheme index, the current channel state, and the embedding capacity. Extensive simulations facilitate the development of expressions to describe the estimated embedding capacity for the proposed scheme when implemented within the single carrier physical layer of the IEEE 802.11ad, directional multi-Gigabit standard. We further identify and characterize various types of distortion and describe additional constraints that may serve to reduce the available embedding margin and overall embedding capacity
IEEE 802.11ac Sebagai Standar Pertama Untuk Gigabit Wireless LAN
WLAN is a technology that currently has been used widely. This technology is considered as a data transferring media technology within the LAN/MAN. To ensure that WLAN technology can be used widely in the whole world, the IEEE has set a standard known as 802.11 to be an International standard for the WLAN technology. This standard was appeared in 1997, and has been revised and improved for several times. This improvement is done to anticipate the rapidly grown WLAN market as well as to keep this technology remains effective, efficient, and reliable at any time. At the beginning of 2014, the IEEE has set 802.11ac-2013 as a new standard for WLANs that operate below 6 GHz to achieve a data rate for up to 7 Gbps. The purpose of this article is to describe comprehensively the IEEE 802.11ac standard as a result of recent changes to the regulatory for WLAN technology which is known as the first standard issued by the IEEE for the gigabit WLANs. This article discusses the goals and objectives to be achieved by 802.11ac standard as well as the parts that have been enhanced significantly both in its PHY and MAC layers. This article will also contrast the differences between the 802.11ac standard and previous WLAN standards. Finally it will also explain the level of compatibility and interoperability of 802.11ac standards with some of previous WLAN standard
Modelling and Analysis of Performance Characteristics in a 60 Ghz 802.11ad Wireless Mesh Backhaul Network for an Urban 5G Deployment
With the widespread deployment of 5G gaining pace, there is increasing interest in deploying this technology beyond traditional Mobile Network Operators (MNO) into private and community scenarios. These deployments leverage the flexibility of 5G itself to support private networks that sit alongside or even on top of existing public 5G. By utilizing a range of virtualisation and slicing techniques in the 5G Core (5GC) and heterogeneous Radio Access Networks (RAN) at the edge, a wide variety of use cases can be supported by 5G. However, these non-typical deployments may experience different performance characteristics as they adapt to their specific scenario. In this paper we present the results of our work to model and predict the performance of millimeter wave (mmWave) backhaul links that were deployed as part of the Liverpool 5G network. Based on the properties of the 802.11ad protocol and the physical characteristics of the environment, we simulate how each link will perform with different signal-to-noise ratio (SNR) and Packet Error Rate (PER) values and verify them against real-world deployed links. Our results show good convergence between simulated and real results and provide a solid foundation for further network planning and optimization
ERROR CORRECTION CODE-BASED EMBEDDING IN ADAPTIVE RATE WIRELESS COMMUNICATION SYSTEMS
In this dissertation, we investigated the methods for development of embedded channels within error
correction mechanisms utilized to support adaptive rate communication systems. We developed an error
correction code-based embedding scheme suitable for application in modern wireless data communication
standards. We specifically implemented the scheme for both low-density parity check block codes and
binary convolutional codes. While error correction code-based information hiding has been previously
presented in literature, we sought to take advantage of the fact that these wireless systems have the ability to
change their modulation and coding rates in response to changing channel conditions. We utilized this
functionality to incorporate knowledge of the channel state into the scheme, which led to an increase in
embedding capacity. We conducted extensive simulations to establish the performance of our embedding
methodologies. Results from these simulations enabled the development of models to characterize the
behavior of the embedded channels and identify sources of distortion in the underlying communication
system. Finally, we developed expressions to define limitations on the capacity of these channels subject to
a variety of constraints, including the selected modulation type and coding rate of the communication
system, the current channel state, and the specific embedding implementation.Commander, United States NavyApproved for public release; distribution is unlimited
How Well Sensing Integrates with Communications in MmWave Wi-Fi?
The development of integrated sensing and communication (ISAC) systems has
recently gained interest for its ability to offer a variety of services
including resources sharing and new applications, for example, localization,
tracking, and health care related. While the sensing capabilities are offered
through many technologies, rending to their wide deployments and the high
frequency spectrum they provide and high range resolution, its accessibility
through the Wi-Fi networks IEEE 802.11ad and 802.11ay has been getting the
interest of research and industry. Even though there is a dedicated
standardization body, namely the 802.11bf task group, working on enhancing the
Wi-Fi sensing performance, investigations are needed to evaluate the
effectiveness of various sensing techniques. In this project, we, in addition
to surveying related literature, we evaluate the sensing performance of the
millimeter wave (mmWave) Wi-Fi systems by simulating a scenario of a human
target using Matlab simulation tools. In this analysis, we processed channel
estimation data using the short time Fourier transform (STFT). Furthermore,
using a channel variation threshold method, we evaluated the performance while
reducing feedback. Our findings indicate that using STFT window overlap can
provide good tracking results, and that the reduction in feedback measurements
using 0.05 and 0.1 threshold levels reduces feedback measurements by 48% and
77%, respectively, without significantly degrading performance.Comment: arXiv admin note: substantial text overlap with arXiv:2207.04859 by
other author