3G cellular networks aimed to provide higher bandwidth and data rates, global roaming, and support for multimedia services. The ITU defined the IMT-2000 standard to enable these capabilities. Major 3G technologies included W-CDMA, CDMA2000, and UWC-136. Early 3G networks rolled out starting in 2001, with the Japanese and Koreans among the first to offer services meeting IMT-2000 specifications. Key technologies like higher bandwidths, packet switching, coherent modulation, smart antennas, and interference management helped 3G networks provide improved performance over 2G networks.
Wireless communication is the transfer of information between two or more points that are not connected by an electrical conductor.
The most common wireless technologies use radio
Wireless communication is the transfer of information between two or more points that are not connected by an electrical conductor.
The most common wireless technologies use radio
Universal mobile telecommunication System (UMTS) is actually the third generation mobile, which uses WCDMA. The Dream was that 2G and 2.5G systems are incompatible around the world.
-Worldwide devices need to have multiple technologies inside of them, i.e. tri-band phones, dual-mode phones
To develop a single standard that would be accepted around the world.
-One device should be able to work anywhere.
Increased data rate.
- Maximum 2048Kbps
UMTS is developed by 3GPP (3 Generation Partnership Project) a joint venture of several organization
3G UMTS is a third-generation (3G): broadband, packet-based transmission of text, digitized voice, video, multimedia at data rates up to 2 Mbps
Also referred to as wideband code division multiple access(WCDMA)
Allows many more applications to be introduce to a worldwide
Also provide new services like alternative billing methods or calling plans.
The higher bandwidth also enables video conferencing or IPTV.
Once UMTS is fully available, computer and phone users can be constantly attached to the Internet wherever they travel and, as they roam, will have the same set of capabilities.
Introduction to basics of wireless networks such as
• Radio waves & wireless signal encoding techniques
• Wireless networking issues & constraints
• Wireless internetworking devices
Indoor propagation is necessary where outdoor propagation don't work perfectly like house, buildings, sports arena. Different material is used in different types of building then signal doesn't propagate as well as in outdoor. So There are different models for different Scenarios due to different environment, wall, etc.
Introduction to Cellular Mobile System,
Performance criteria,
uniqueness of mobile radio environment,
operation of cellular systems,
Hexagonal shaped cells,
Analog Cellular systems.
Digital Cellular systems
Universal mobile telecommunication System (UMTS) is actually the third generation mobile, which uses WCDMA. The Dream was that 2G and 2.5G systems are incompatible around the world.
-Worldwide devices need to have multiple technologies inside of them, i.e. tri-band phones, dual-mode phones
To develop a single standard that would be accepted around the world.
-One device should be able to work anywhere.
Increased data rate.
- Maximum 2048Kbps
UMTS is developed by 3GPP (3 Generation Partnership Project) a joint venture of several organization
3G UMTS is a third-generation (3G): broadband, packet-based transmission of text, digitized voice, video, multimedia at data rates up to 2 Mbps
Also referred to as wideband code division multiple access(WCDMA)
Allows many more applications to be introduce to a worldwide
Also provide new services like alternative billing methods or calling plans.
The higher bandwidth also enables video conferencing or IPTV.
Once UMTS is fully available, computer and phone users can be constantly attached to the Internet wherever they travel and, as they roam, will have the same set of capabilities.
Introduction to basics of wireless networks such as
• Radio waves & wireless signal encoding techniques
• Wireless networking issues & constraints
• Wireless internetworking devices
Indoor propagation is necessary where outdoor propagation don't work perfectly like house, buildings, sports arena. Different material is used in different types of building then signal doesn't propagate as well as in outdoor. So There are different models for different Scenarios due to different environment, wall, etc.
Introduction to Cellular Mobile System,
Performance criteria,
uniqueness of mobile radio environment,
operation of cellular systems,
Hexagonal shaped cells,
Analog Cellular systems.
Digital Cellular systems
Evolution of Wireless Communication TechnologiesAkhil Bansal
Detailed presentation on Wireless Communication Technologies.
The communication technology has evolved to provide lower latency network, faster and efficient data services.
Mobile communication lectures
engineering + education purpose
This series of lectures was prepared for the fourth class of computer networks department IN AL-Bani University College / Baghdad / Iraq.
I depend in make these lectures on-
1. Lecture Notes on Mobile Communication/ Dr. Abhijit Mitra
2. ANTENNA SYSTEM IN CELLULAR MOBILE COMMUNICATION/ SANJAYA GURUNG NILAB PRADHAN
3. RADIO COVERAGE OF CELLULAR MOBILE NETWORK IN BAGHDAD CITY/ MARWA MOUTAZ
This series of lectures is not finished yet; I will complete it and update the PDF as soon as possible.
Forgive me for any wrong by mistake.
My regards
Marwa Moutaz/ M.Sc. studies of Communication Engineering / University of Technology/ Bagdad / Iraq.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
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
Search and Society: Reimagining Information Access for Radical FuturesBhaskar Mitra
The field of Information retrieval (IR) is currently undergoing a transformative shift, at least partly due to the emerging applications of generative AI to information access. In this talk, we will deliberate on the sociotechnical implications of generative AI for information access. We will argue that there is both a critical necessity and an exciting opportunity for the IR community to re-center our research agendas on societal needs while dismantling the artificial separation between the work on fairness, accountability, transparency, and ethics in IR and the rest of IR research. Instead of adopting a reactionary strategy of trying to mitigate potential social harms from emerging technologies, the community should aim to proactively set the research agenda for the kinds of systems we should build inspired by diverse explicitly stated sociotechnical imaginaries. The sociotechnical imaginaries that underpin the design and development of information access technologies needs to be explicitly articulated, and we need to develop theories of change in context of these diverse perspectives. Our guiding future imaginaries must be informed by other academic fields, such as democratic theory and critical theory, and should be co-developed with social science scholars, legal scholars, civil rights and social justice activists, and artists, among others.
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
From Daily Decisions to Bottom Line: Connecting Product Work to Revenue by VP...
Imt 2000
1. Wireless &Mobile Communications
Chapter 9: 3G Cellular
What is 3G?
The ITU’s International Vision
The need/motivation for 3G
The Major Players
3G Architecture and Services
W-CDMA and CDMA2000 technologies
2. What is 3G?
The current cellular system is referred to as 2G cellular.
It differs from the the first generation cellular in that the
system is fully digital and provides roaming on a national or
regional basis
The next generation cellular, 3G, is envisioned to enable
communication at any time, in any place, with any form, as
such, it will:
allow global roaming
provide for wider bandwidths to accommodate different types
of applications
support packet switching concepts
The ITU named this vision: IMT-2000 (International Mobile
Telecommunications 2000) with the hope of having it
operational by the year 2000 in the 2000MHz range.
Ch9: 3G Cellular
Winter 2001
9.2
3. IMT 2000 Vision
Common spectrum worldwide (2.8 – 2.2 GHz band)
Multiple environments, not only confined to cellular,
encompasses: cellular, cordless, satellite, LANs, wireless
local loop (WLL)
Wide range of telecommunications services (data, voice,
multimedia, etc.)
Flexible radio bearers for increased spectrum efficiency
Data rates of: 9.6Kbps or higher for global (mega cell),
144Kbps or higher for vehicular (macro cell), 384Kbps or
higher for pedestrian (micro cell) and up to 2Mbps for
indoor environments (pico cell)
Global seamless roaming
Enhanced security and performance
Full integration of wireless and wireline
Ch9: 3G Cellular
Winter 2001
9.3
4. Major 3G Technologies Proposed for IMT 2000
W-CDMA backward compatible with GSM (called UMTS by
the ETSI)
The IS-95 standard (CDMAOne) is evolving its own vision of
3G: CDMA2000
The IS-136 standard is evolving its own migration to 3G,
Universal Wireless Communications, UWC-136 or IS-136 HS
Ch9: 3G Cellular
Winter 2001
9.4
5. Who will be first to offer IMT 2000?
The Japanese are leading the pack with their W-CDMA
implementation. It is being rolled out in the year 2001.
The Koreans plan to have CDMA2000 up an running before
the world cup in 2002.
The Europeans are pushing hard to UMTS up soon but the
current push is fro 2.5G, a middle of the road to protect
current infrastructure investments.
In the US no major push yet, some service providers are
following in the footsteps of the Europeans by pushing a
2.5G solution.
Ch9: 3G Cellular
Winter 2001
9.5
6. IMT 2000 Services/Capabilities 1/2
All what 2G support including:
Registration, authentication and encryption
SMS
Emergency calling
Bit rates:
144Kbps or higher for vehicular (macro cell),
384Kbps or higher for pedestrian (micro cell) and
up to 2Mbps for indoor environments (pico cell)
Billing/charging/user profiles
Sharing of usage/rate information between service providers
Standardized call detail recording
Standardized user profiles
Ch9: 3G Cellular
Winter 2001
9.6
7. IMT 2000 Services/Capabilities 2/2
Support of geographic position finding services
For the mobile
For the network
Support of multimedia services
QoS
Assymmetric links
Fixed and variable rate
Bit rates of up to 2Mpbs
Support of packet services
Internet Access (wireless cellular IP)
Ch9: 3G Cellular
Winter 2001
9.7
8. IMT 2000 Family Concept
The IMT 2000 family concept defines some basic
interoperability capabilities between different IMT 2000
technologies to enable global roaming!
Different Radio Access Networks (RANs):
CDMA2000
W-CDMA
UWC-136
Different Core Network standards
IS 41
GSM
ISDN
Ch9: 3G Cellular
Winter 2001
9.8
9. Challenge for the Family Concept
With IMT 2000 Standard Interfaces and Capabilities:
Any Family RAN could interface with any Family Core Network
for some minimum set of features.
More advanced features are possible in limited regions
where the Family RAN and the Family Core Network are
optimally matched
The Core Network functionality should be kept independent
of the Radio technology.
By maintaining independence, each can evolve separately
based on needs
User Identity Modules (UIM) Plug-In modules could be used
in locally rented handsets for Global Roaming with at least
the minimum feature set. (similar to GSM SIMs)
Ch9: 3G Cellular
Winter 2001
9.9
10. UIM Roaming
UIM cards should allow a subscriber to obtain:
Any IMT 2000 service/capability basic feature set on
Any IMT 2000 Network family member (W-CDMA, CDMA2000
and UWC-136)
UIM Card: will be a superset of the current GSM SIM
Contains all necessary information about the user’s service
subscriptions
Supports user identity separate from handset identity:
Allows a user to use different handsets, with all usage billed to the
single user
Allows a user to rent a handset in a foreign country/network and obtain
instant service
Ch9: 3G Cellular
Winter 2001
9.10
11. To reach the IMT 2000 vision
Physical interfaces are being standardized:
UIM to handset interface
Radio/Air interfaces
RAN to Core Network
Network to Network Interfaces (NNI) between Core Networks
Radio independent functions are being standardized:
UIM to handset
Handset to Core Network
NNI
Ch9: 3G Cellular
Winter 2001
9.11
12. Key Technology Concepts for 3G
Higher bit rates required -> more bandwidth
Packet and circuit switched services
Coherent demodulation
TDD
Architecting for minimum required Eb/Io
Control Eb
Limit/Cancel Io
Smart antennas
Ch9: 3G Cellular
Winter 2001
9.12
13. Higher bit rates -> larger bandwidths
No free lunch!!!
For a CDMA system;
For 2-4Mbps you need around 20MHz channel
For 1-2Mbps you need around 10MHz channel
For 256Kbps-1Mbps you need around 5MHz channel
Ch9: 3G Cellular
Winter 2001
9.13
14. Packet and Circuit Switched Services
CS channels: 32 – 384 Kbps
PS channels: 64Kbps to 2Mbps
Circuit mode versus packet mode for data services:
Circuit mode
provides a dedicated channel for the duration of the call
Can mux control with data in same channel, can be a problem for data if bit
stealing is used
Packet mode
Requires a scheduling scheme to control access to the shared channel
Generally supports a separate control channel
CDMA Packet Mode: two main approaches
Users share a dedicated channel (code):
Sequential access or scheduled on a need basis
Users share the allowable total interference for the carrier:
Each user gets a unique code
Users must be scheduled and transmissions controlled to limit the load in the
system
Combination of the above two
Ch9: 3G Cellular
Winter 2001
9.14
15. Coherent vs Non coherent demodulation
Non coherent demodulation – where the receiver has no
reference phase with which to compare the received signal
Coherent demodulation – where the receiver does have a
reference pahse, supplied by the transmitted
A continuous Pilot ( or Reference) channel transmitted along
with the signal (e.g. pilot channel in IS-95 for downlink)
A known sequence of Pilot (or Reference) symbols (or bits)
embedded, periodically, in the signal bit stream (e.g. proposed
for W-CDMA in both uplink and downlink channels, also
CDMA2000 incorporates a pilot channel in reverse direction)
Ch9: 3G Cellular
Winter 2001
9.15
16. TDD
All the standards naturally support FDD
TDD can be added to allow transmission and reception in
single frequency band.
Symmetric channels for up and down links
Japanese W-CMDA supports an asymmetric TDD channel in
addition to the FDD support
TDD allows for flexible spectrum usage, does not require
paired frequency bands
Simpler, lower cost handsets – no need for duplex filters
More complex synchronization, the channel flips back and
forth between uplink and downlink.
Ch9: 3G Cellular
Winter 2001
9.16
17. Architecting for Minimum Required Eb/Io
Eb/Io vs Eb/No vs C/SIR or SNR:
The former two refer to the energy per bit and are therefore
more applicable to digital systems. The latter two are generally
used to refer to analog systems.
Using I vs N basically has to do with what the noise source is,
in cellular systems it is primarily due to interference so ``I” is
the preferred term.
Eb =P/R
P is the power per bit in units of energy/sec
R is the signal bit rate in bits/sec
Eb is the received energy per bit of the signal, Io is the
interference power density
Eb is directionally proportional to the received power of the
signal
For CDMA: Eb/Io = (Pm/Itot) x (W/R) = SIR x Processing Gain
Eb/Io is the key parameter in determining the probability of
receiving a bit correctly (I.e., the BER)
Ch9: 3G Cellular
Winter 2001
9.17
18. Techniques to keep Eb/Io low with higher bit rates
Maximize Frequency diversity – wider bands -> higher
processing gains
Maximize Time diversity –
Rake receivers -> multiple signals with different delays at
receiver,
interleaving with FEC
Maximize Space diversity –
diverse receive antennas at base station,
rake receivers -> different signal paths
Use FEC (forward error correction)
All of the above techniques come at a cost:
Higher bandwidth
More complex receivers (rake, multiple antennas)
More overhead bits (FEC) per signal
Ch9: 3G Cellular
Winter 2001
9.18
19. Controlling Eb
More power is required for the transmission of bits at
higher bit rates over the same distance
Limit the distance over which high bit rates maybe sent
Using better antennas that will focus the beam so that:
The transmitter aims at the target without wasting energy in all
directions
The receiver captures more of the signal as it is focused on a
narrow beam
Fast power control to counteract changes in interference
due to
Changing loads
Changing environments
Ch9: 3G Cellular
Winter 2001
9.19
20. Limit Io
Use better antennas with focused beams in conjunction
with sectors
Use interference cancellation -> receive all signals and
subtract all but the desired one from the total
Use more accurate and fasted power control techniques
To not transmit signals when there is a silence in the signal
Ch9: 3G Cellular
Winter 2001
9.20
21. Smart Antennas
Switched beams:
Several antenna beams used to receive the signal
Use the antenna that receives the strongest signal
Not well suited to CDMA:
Switching will cause chip errors
Switching could disturb synchronization and demodulation
Works against the concept of the Rake receiver
Adaptive Arrays:
Narrow beam antenna which is steered to follow the mobile(s)
Better suited to CDMA but still have the Rake receiver problem
Ch9: 3G Cellular
Winter 2001
9.21