NetSim (http://www.tetcos.com/) Best Network Simulator , provide wireless sensor network Based IEEE 802.15.4 Standard
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Versatile Low Power Media Access for Wireless Sensor NetworksMichael Rushanan
Media access control in wireless sensor networks must be small, efficient, and energy conscious. This presentation presented the findings of a paper from Berkley, "Versatile Low Power Media Access for Wireless Sensor Networks," where the authors present just such a MAC implementation called, BMAC. The presentation was delivered to a graduate students at Johns Hopkins University enrolled in Embedded Systems and Wireless Sensor Networks.
This slides about Wireless sensor network MAC protocol,
There are bunch of MAC protocol in research field.
It classify the MAC protocol and summarize the feature of typical sensor network MAC protcol
Introduction
Background
WSN Design Issues: MAC Protocols, Routing Protocols, Transport Protocols
Performance Modeling of WSNs: Performance Metrics, Basic Models, Network Models
Case Study: Simple Computation of the System Life Span
Practical Example.
How to put these nodes together to form a meaningful network.
How a network should function at high-level application scenarios .
On the basis of these scenarios and optimization goals, the design of networking protocols in wireless sensor networks are derived
A proper service interface is required and integration of WSNs into larger network contexts.
Proactive routing protocol
Each node maintain a routing table.
Sequence number is used to update the topology information
Update can be done based on event driven or periodic
Observations
May be energy expensive due to high mobility of the nodes
Delay can be minimized, as path to destination is already known to all nodes.
Versatile Low Power Media Access for Wireless Sensor NetworksMichael Rushanan
Media access control in wireless sensor networks must be small, efficient, and energy conscious. This presentation presented the findings of a paper from Berkley, "Versatile Low Power Media Access for Wireless Sensor Networks," where the authors present just such a MAC implementation called, BMAC. The presentation was delivered to a graduate students at Johns Hopkins University enrolled in Embedded Systems and Wireless Sensor Networks.
This slides about Wireless sensor network MAC protocol,
There are bunch of MAC protocol in research field.
It classify the MAC protocol and summarize the feature of typical sensor network MAC protcol
Introduction
Background
WSN Design Issues: MAC Protocols, Routing Protocols, Transport Protocols
Performance Modeling of WSNs: Performance Metrics, Basic Models, Network Models
Case Study: Simple Computation of the System Life Span
Practical Example.
How to put these nodes together to form a meaningful network.
How a network should function at high-level application scenarios .
On the basis of these scenarios and optimization goals, the design of networking protocols in wireless sensor networks are derived
A proper service interface is required and integration of WSNs into larger network contexts.
Proactive routing protocol
Each node maintain a routing table.
Sequence number is used to update the topology information
Update can be done based on event driven or periodic
Observations
May be energy expensive due to high mobility of the nodes
Delay can be minimized, as path to destination is already known to all nodes.
TIME SYNCHRONIZATION IN WIRELESS SENSOR NETWORKS: A SURVEYijujournal
Time synchronization is a critical piece of infrastructure for any distributed system. Wireless sensor networks have emerged as an important and promising research area in the recent years. Time synchronization is important for many sensor network applications that require very precise mapping of gathered sensor data with the time of the events, for example, in tracking and vehicular surveillance. It also plays an important role in energy conservation in MAC layer protocols. The paper studies different existing methods, protocols, significant time parameters (clock drift, clock speed, synchronization errors, and topologies) to achieve accurate synchronization in a sensor network. The studied Synchronization protocols include conventional time sync protocols (RBS, Timing-sync Protocol for Sensor Networks -TPSN, FTSP), and other application specific
approaches such as all node-based approach, a diffusion-based method and group sync approaches aiming at providing network-wide time. The goal for writing this paper is to study most common existing time synchronization approaches and stress the need of a new class of secure-time synchronization protocol that is scalable, topology independent, fast convergent, energy efficient, less latent and less application dependent in a heterogeneous hostile environment. Our survey provides a valuable framework by which protocol designers can compare new and
existing synchronization protocols from various metric discussed in the paper. So, we are hopeful that this paper will serve a complete one-stop investigation to study the characteristics of existing time synchronization protocols and its implementation mechanism in a Sensor network environment.
UNIT IV WIRELESS SENSOR NETWORKS (WSNS) AND MAC PROTOCOLS 9 Single node architecture: hardware and software components of a sensor node - WSN Network architecture: typical network architectures-data relaying and aggregation strategies -MAC layer protocols: self-organizing, Hybrid TDMA/FDMA and CSMA based MAC- IEEE 802.15.4.
TIME SYNCHRONIZATION IN WIRELESS SENSOR NETWORKS: A SURVEYijujournal
Time synchronization is a critical piece of infrastructure for any distributed system. Wireless sensor networks have emerged as an important and promising research area in the recent years. Time synchronization is important for many sensor network applications that require very precise mapping of gathered sensor data with the time of the events, for example, in tracking and vehicular surveillance. It also plays an important role in energy conservation in MAC layer protocols. The paper studies different existing methods, protocols, significant time parameters (clock drift, clock speed, synchronization errors, and topologies) to achieve accurate synchronization in a sensor network. The studied Synchronization protocols include conventional time sync protocols (RBS, Timing-sync Protocol for Sensor Networks -TPSN, FTSP), and other application specific
approaches such as all node-based approach, a diffusion-based method and group sync approaches aiming at providing network-wide time. The goal for writing this paper is to study most common existing time synchronization approaches and stress the need of a new class of secure-time synchronization protocol that is scalable, topology independent, fast convergent, energy efficient, less latent and less application dependent in a heterogeneous hostile environment. Our survey provides a valuable framework by which protocol designers can compare new and
existing synchronization protocols from various metric discussed in the paper. So, we are hopeful that this paper will serve a complete one-stop investigation to study the characteristics of existing time synchronization protocols and its implementation mechanism in a Sensor network environment.
UNIT IV WIRELESS SENSOR NETWORKS (WSNS) AND MAC PROTOCOLS 9 Single node architecture: hardware and software components of a sensor node - WSN Network architecture: typical network architectures-data relaying and aggregation strategies -MAC layer protocols: self-organizing, Hybrid TDMA/FDMA and CSMA based MAC- IEEE 802.15.4.
Single node architecture: hardware and software components of a sensor node - WSN
Network architecture: typical network architectures-data relaying and aggregation strategies -
MAC layer protocols: self-organizing, Hybrid TDMA/FDMA and CSMA based MAC- IEEE
802.15.4
One can Simulate Wireless Sensor network using NetSim (http://www.tetcos.com/ ) Network Simulator follow this link for more Details
http://www.tetcos.com/
NetSim (http://www.tetcos.com/ ) is a network simulation and network emulation tool used for network design & planning, defense applications and network R & D. Various technologies such as Cognitive Radio, Wireless Sensor Networks, Wireless LAN, Wi Max, TCP, IP, etc. are covered in NetSim. Please Follow this linkhttp://www.tetcos.com/:
Maharastra University CCN NetSIm (http://www.tetcos.com/ ) Experiment Manual , which can be done using NetSim Simulator , follow this Link :http://www.tetcos.com/
Maharastra University electronics and Telecommunication Department NetSim (http://www.tetcos.com/ ) Experiment Manual , which can be done using NetSim Simulator , follow this Link :http://www.tetcos.com/
Simulation (http://www.tetcos.com/ ) of Sink Hole Attack in Mobile Ad-Hoc Networks can be done NetSim Network Simulator
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NetSim(http://www.tetcos.com/ ) Simulator provide Cognative Radio network
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Cognitive radio (CR) is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which are not, and instantly move into vacant channels while avoiding occupied ones
SAP Sapphire 2024 - ASUG301 building better apps with SAP Fiori.pdfPeter Spielvogel
Building better applications for business users with SAP Fiori.
• What is SAP Fiori and why it matters to you
• How a better user experience drives measurable business benefits
• How to get started with SAP Fiori today
• How SAP Fiori elements accelerates application development
• How SAP Build Code includes SAP Fiori tools and other generative artificial intelligence capabilities
• How SAP Fiori paves the way for using AI in SAP apps
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
GridMate - End to end testing is a critical piece to ensure quality and avoid...ThomasParaiso2
End to end testing is a critical piece to ensure quality and avoid regressions. In this session, we share our journey building an E2E testing pipeline for GridMate components (LWC and Aura) using Cypress, JSForce, FakerJS…
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024Neo4j
Neha Bajwa, Vice President of Product Marketing, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Communications Mining Series - Zero to Hero - Session 1DianaGray10
This session provides introduction to UiPath Communication Mining, importance and platform overview. You will acquire a good understand of the phases in Communication Mining as we go over the platform with you. Topics covered:
• Communication Mining Overview
• Why is it important?
• How can it help today’s business and the benefits
• Phases in Communication Mining
• Demo on Platform overview
• Q/A
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
2. IntroductionIntroduction
• IEEE 802.15.4 LR-WPAN(Low data Rate -
Wireless Personal Area Networks) standard is
widely used because of its position
independent sensing capabilities even in toxic
and inaccessible regions to humans.
• Sensors are low cost and can be randomly
placed as long as they are in some sensors
coverage area.
3. ApplicationsApplications
• Area Monitoring
– WSN is deployed over a region where some
phenomenon is to be monitored like detecting
enemy intrusion etc.,
• Forest Fire Detection
– A network of Sensor Nodes can be installed in a
forest to detect when a fire has started.
• Battlefield surveillance
• Reference: Wikipedia
4. Devices in WSNDevices in WSN
• WSN has mainly two types for devices;FFD,RFD
• FFD or Full Functional Device
– Senses the agent
– Routes packets and
– Initialize the Network(act as PAN Coordinator)
– Can communicate with another RFD or FFD
• RFD or Reduced Functional Device
– Can only sense the agent
– Can communicate with FFD only
5. Sink nodeSink node
• Sink node is the principal controller in WPAN
and there is only one PAN Coordinator in a
WSN.
• If Sink node uses Beacon enabled mode then
nodes use Slotted CSMA/CA algorithm for
transmitting packets else nodes use Unslotted
CSMA/CA.
6. AgentAgent
• Sensors sense the Agent and generate a packet
containing its position if the agent is in its
sensitivity range.
• In NetSim, Agent mobility is modeled by
RandomWalk and RandomWayPoint which are
followed internationally to test WSN.
• For each of the models we can set its velocity and
pause time(only random way point) and also we
can capture the agents path for the whole
simulation.
7. SensorSensor
• WSN consists of spatially distributed sensors
to monitor physical or environmental
conditions, such as temperature, sound,
pressure, etc. and to cooperatively pass their
data through the network to a main
location(Sink node).
10. Beacon FrameBeacon Frame
• Beacons occupy the first slot in SuperFrame.
• Beacons are used to synchronize the attached
devices, to identify the PAN, and to describe the
structure of the super frames.
• Beacon frames are transmitted periodically to
announce the presence of a network.
13. Active PeriodActive Period
• Active period consists of two periods
– Contention Access Period (CAP)
– Contention Free Period (CFP)
• Length of active period is determined by the
SuperFrame Order
• Active Period Length =
aBaseSuperframeDuration * symbols
2
SO
14. Contention Access Period (CAP)Contention Access Period (CAP)
• In CAP all the nodes having a packet to transmit
compete for the channel and follows Slotted CSMA/CA
algorithm.
• A sufficient portion of the CAP remains for contention-
based access of other networked devices or new
devices wishing to join the network.
15. Contention Free Period (CFP)Contention Free Period (CFP)
• CFP is used to allocate slots for the nodes which require low latency
i.e., PAN coordinator allocates guaranteed time slots (GTS) for such
nodes.
• A node issues GTS allocation request to the PAN coordinator, which
can allocate available GTS to nodes.
• In the CFP, the node requested for GTS can transmit during its GTS
if it is allocated, without any contention with other devices.
• CFP can be disabled by disabling GTS.
16. Inactive periodInactive period
• In the inactive period, the coordinator may enter
a low-power mode and doesn’t interact with its
PAN which helps in reduced energy consumption
and so extends the network lifetime
• Inactive period can be remove by setting
SuperFrame Order same as Beacon Order
SOBO ≡
17. PacketPacket
• Packet is generated by the sensor whenever agent comes
with in its sensor range and for every sensing interval.
• Each packet is characterized by 3 variables NB,CW,BE
– NB, Number of backoffs the node has underwent while
attempting the current transmission, initialized to 0 before
every new transmission
– CW, Contention Window Length, which defines the number of
backoff periods that need to be clear of channel activity before
starting transmission. CW is only used with the slotted CSMA/CA
version. This value is initialized to 2 before each transmission
attempt and reset to 2 each time the channel is assessed to be
busy.
– BE, Backoff exponent is related to backoff periods (0 to 2BE
-1) a
device has to wait before attempting to assess the channel.
18. Clear Channel Assessment (CCA)Clear Channel Assessment (CCA)
• CCA is responsible for sensing channel as busy or idle.
• The CCA is performed in three operational modes:
– Energy Detection mode: If the Channel energy is less than ED
threshold then the channel is reported as Idle else channel is
reported as busy.
– Carrier Sense mode: CCA reports a busy medium only if it
detects a signal with the modulation and the spreading
characteristics of IEEE 802.15.4 and which may be higher or
lower than the ED threshold.
– Carrier Sense with Energy Detection mode: This is a
combination of the fore mentioned techniques. CCA reports the
medium is busy only if it detects a signal with the modulation
and the spreading characteristics of IEEE 802.15.4 and with
energy above the ED threshold.
20. DescriptionDescription
Unslotted CSMA/CA Slotted CSMA/CA
Step1 NB(=0),CW(=1),BE are initialized. NB(=0),CW(=2),BE are initialized.
Locate the backoff boundary and
attempt for transmission or channel
assess at the start of the slot.
Step2 MAC layer shall delay for a random number of
backoff periods in the range (0 to )
Same
Step3 MAC will request PHY to perform CCA.
If the frame transmission and acknowledgment
can be completed before the end of the current
CAP then MAC sub layer shall proceed else it shall
wait until the start of the CAP in the next
SuperFrame and repeat the evaluation.
Same
Step4
(Channel is
busy)
MAC sub layer shall increment both NB and BE by
one, ensuring that BE shall be no more than
aMaxBE and if NB is greater than
maxMaxCSMABackoffs then the packet is
discarded else return to step 2.
Same and CW is reset to 2.
Step5
(Channel is
Idle)
MAC sub layer starts transmission. If CW is zero then start transmission
else return to step 3
21. Data Link Layer ParametersData Link Layer Parameters
Parameter Standard Name Standard Value
Beacon Order BO [0 to 15]
SuperFrame Order SO [0 to 15]
Base SuperFrame Duration aBaseSuperframeDuration 15.36 milliseconds
Min Backoff Exponent macMinBE 3
Max Backoff Exponent aMaxBE 5
Max Frame Retries aMaxframeRetries 3
Max CSMA Backoffs macMaxCSMABackoffs 4
22. PHY ParametersPHY Parameters
Parameter Standard Value
Frequency Band 2.4 GHz
Chip Rate 2000 McPS
Symbol Rate 62.5 kSymbolsPS
Modulation Technique O-QPSK
Unit Backoff Time 20 Symbols
Turn Around Time 12 Symbols
Transmitter Power 100 mW
Sensor Range 100 m
Receiver Sensitivity -85 dbm
ED Threshold -95 dbm
23. ReferencesReferences
1. Specification-based Intrusion Detection for
Home Area Networks in Smart Grids
Paria Jokar, Hasen Nicanfar, Victor C.M. Leung Department of
Electrical and Computer Engineering The University of British
Columbia
1. ZigBee for Building Control Wireless Sensor
Networks
Fabio L. Zucatto1,2, Clecio A. Biscassi2 Ferdinando Monsignore2,
Francis Fidélix2, Samuel Coutinho2, and Mônica L. Rocha1
1. ZigBee Based Wireless Sensor Networks and Its
Applications in Industrial
Shizhuang Lin1, Jingyu Liu2 and Yanjun Fang3 Department of
Automation, Wuhan University