3G wireless systems provide improved digital voice communications and higher data rates compared to 2G systems. Key 3G technologies include WCDMA, CDMA2000, and UMTS. WCDMA uses direct sequence spread spectrum and supports capabilities like voice quality comparable to PSTN, data rates from 144 kbps to 2 Mbps, and both circuit-switched and packet-switched services. It also addresses issues like handover, power control, and quality of service support. 4G systems are still being developed and will offer higher data rates than 3G through the use of technologies like OFDM and operation at frequency bands below 5 GHz.
This document provides an overview of 3G wireless systems and the transition to 4G. It describes the advantages of 3G including higher data rates and bandwidth. The key 3G technologies are identified as WCDMA, CDMA2000, and UMTS. The document outlines aspects of the WCDMA protocol including the physical, MAC, RLC, and RRC layers. It also discusses handover, power control, and quality of service support in 3G. 4G is predicted to provide even higher data rates while using smaller cell sizes and frequency bands below 5 GHz.
3G wireless systems provide improved digital voice communications and higher data rates compared to 2G. Key 3G technologies include WCDMA, CDMA2000, and UMTS. WCDMA uses direct sequence spread spectrum and supports features like handover, power control, and quality of service. 4G aims for even higher data rates and spectral efficiency using technologies like OFDM. It is still in development with commercial deployment expected around 2010. 3G continues to spread globally with WCDMA and CDMA2000 as leading standards.
3G technologies provide improved digital voice and higher bandwidth data services over 2G. The key 3G standards are WCDMA, CDMA2000, and TD-SCDMA. WCDMA addresses issues like handover and power control. 4G will offer even higher data rates and bandwidth below 5GHz, along with lower costs per bit than 3G.
WCDMA uses direct sequence spread spectrum technology where user data is multiplied by pseudo-random codes to spread it across a wide bandwidth. This processing gain allows multiple users to transmit simultaneously while maintaining sufficient signal to interference ratios. Power control is used to ensure each user transmits with the minimum necessary power level to reduce interference. Admission control and power control work together to manage system capacity and maintain quality of service as user numbers and noise levels change.
This document discusses CDMA technology, including its key attributes and components. It describes CDMA's high system capacity which is enabled by features like soft handoff and RAKE receivers that handle multipath signals. It also discusses power control in CDMA systems, which helps maximize capacity by adjusting mobile transmit power levels. The document outlines CDMA handoff methods and the sets of pilot channels used. It provides an overview of the CDMA2000 standard and its protocol stack.
UMTS is the 3G cellular standard proposed by ETSI to evolve GSM and GPRS networks. It uses WCDMA as its air interface and includes the following key aspects:
- A complete system architecture with standardized interfaces to allow interoperability between vendors.
- A UTRAN subsystem comprising Node B base stations and RNC controllers to handle radio functionality using WCDMA.
- A core network subsystem including elements like MSC, SGSN, GGSN to support both circuit switched and packet switched services.
- WCDMA uses CDMA with variable spreading factors to provide different data rates. It employs channelization codes, scrambling codes and modulation like QPSK.
UMTS-WCDMA is a 3G mobile communication standard that uses CDMA technology. It uses wideband CDMA with a chip rate of 3.84 Mcps for its air interface along with orthogonal variable spreading factor codes. The standard defines protocols and procedures for cell search, handover, uplink and downlink physical channels, and support for multirate services through variable spreading factors. Long term targets for UMTS-WCDMA evolution include higher data rates up to 100 Mbps for full mobility and 1 Gbps for low mobility, as well as improved spectral efficiency.
3G is defined by the ITU and called IMT-2000. It evolved from 2G technologies through intermediary 2.5G and 3.5G standards. UMTS is the 3G standard developed by 3GPP as an upgrade from GSM, using W-CDMA technology. UMTS network architecture consists of the core network, UTRAN radio access network, and user equipment. The UTRAN air interface uses W-CDMA technology with Node-B base stations controlled by RNCs. 3.5G technologies like HSPA extend UMTS with features like adaptive modulation and fast scheduling to enhance performance.
This document provides an overview of 3G wireless systems and the transition to 4G. It describes the advantages of 3G including higher data rates and bandwidth. The key 3G technologies are identified as WCDMA, CDMA2000, and UMTS. The document outlines aspects of the WCDMA protocol including the physical, MAC, RLC, and RRC layers. It also discusses handover, power control, and quality of service support in 3G. 4G is predicted to provide even higher data rates while using smaller cell sizes and frequency bands below 5 GHz.
3G wireless systems provide improved digital voice communications and higher data rates compared to 2G. Key 3G technologies include WCDMA, CDMA2000, and UMTS. WCDMA uses direct sequence spread spectrum and supports features like handover, power control, and quality of service. 4G aims for even higher data rates and spectral efficiency using technologies like OFDM. It is still in development with commercial deployment expected around 2010. 3G continues to spread globally with WCDMA and CDMA2000 as leading standards.
3G technologies provide improved digital voice and higher bandwidth data services over 2G. The key 3G standards are WCDMA, CDMA2000, and TD-SCDMA. WCDMA addresses issues like handover and power control. 4G will offer even higher data rates and bandwidth below 5GHz, along with lower costs per bit than 3G.
WCDMA uses direct sequence spread spectrum technology where user data is multiplied by pseudo-random codes to spread it across a wide bandwidth. This processing gain allows multiple users to transmit simultaneously while maintaining sufficient signal to interference ratios. Power control is used to ensure each user transmits with the minimum necessary power level to reduce interference. Admission control and power control work together to manage system capacity and maintain quality of service as user numbers and noise levels change.
This document discusses CDMA technology, including its key attributes and components. It describes CDMA's high system capacity which is enabled by features like soft handoff and RAKE receivers that handle multipath signals. It also discusses power control in CDMA systems, which helps maximize capacity by adjusting mobile transmit power levels. The document outlines CDMA handoff methods and the sets of pilot channels used. It provides an overview of the CDMA2000 standard and its protocol stack.
UMTS is the 3G cellular standard proposed by ETSI to evolve GSM and GPRS networks. It uses WCDMA as its air interface and includes the following key aspects:
- A complete system architecture with standardized interfaces to allow interoperability between vendors.
- A UTRAN subsystem comprising Node B base stations and RNC controllers to handle radio functionality using WCDMA.
- A core network subsystem including elements like MSC, SGSN, GGSN to support both circuit switched and packet switched services.
- WCDMA uses CDMA with variable spreading factors to provide different data rates. It employs channelization codes, scrambling codes and modulation like QPSK.
UMTS-WCDMA is a 3G mobile communication standard that uses CDMA technology. It uses wideband CDMA with a chip rate of 3.84 Mcps for its air interface along with orthogonal variable spreading factor codes. The standard defines protocols and procedures for cell search, handover, uplink and downlink physical channels, and support for multirate services through variable spreading factors. Long term targets for UMTS-WCDMA evolution include higher data rates up to 100 Mbps for full mobility and 1 Gbps for low mobility, as well as improved spectral efficiency.
3G is defined by the ITU and called IMT-2000. It evolved from 2G technologies through intermediary 2.5G and 3.5G standards. UMTS is the 3G standard developed by 3GPP as an upgrade from GSM, using W-CDMA technology. UMTS network architecture consists of the core network, UTRAN radio access network, and user equipment. The UTRAN air interface uses W-CDMA technology with Node-B base stations controlled by RNCs. 3.5G technologies like HSPA extend UMTS with features like adaptive modulation and fast scheduling to enhance performance.
Third Generation (3G) wireless systems focused on improving speed and effectiveness of critical communication over 3G standards - W-CDMA, UMTS, and CDMA2000. 4G provides even higher broadband speeds for live streaming, video conferencing, and location-based services. The document compares capabilities and standards of 3G and emerging 4G wireless technologies.
The document provides information on the fundamentals and evolution of 3G mobile communication standards. It discusses:
- 1st generation standards including AMPS, TACS, NMT, and others operating between 30-200 KHz.
- 2nd generation standards including GSM, IS-136, IS-95, and PDC operating at 200 KHz, utilizing TDMA and early digital technologies.
- UMTS (3G) evolution through 3GPP releases, utilizing WCDMA technology, and achieving speeds up to 2 Mbps through improvements like HSPA and LTE.
Modern Wireless Communication Systems
This document discusses the evolution of wireless communication systems from 1G to 4G. It provides details on each generation including the technologies used, key standards, capabilities and comparisons. 1G systems were analog and offered basic voice calls. 2G introduced digital networks and supported limited data. 2.5G enhanced 2G for higher speeds. 3G enabled multimedia and high-speed data using standards like W-CDMA, CDMA2000 and TD-SCDMA. 4G provides speeds up to 20 Mbps for improved multimedia services on mobile networks. The document also discusses short-range wireless technologies like Bluetooth and wireless LANs that operate without licensed spectrum.
The document discusses the development of 3G cellular networks and standards. The International Telecommunication Union (ITU) established the IMT-2000 standard to harmonize 3G systems worldwide and enable global roaming. IMT-2000 outlined performance targets for 3G networks to provide high-speed data and multimedia services to mobile users. Two main proposals were developed under IMT-2000: UMTS, backed by 3GPP in Europe, and CDMA2000, backed by 3GPP2 in North America and Asia.
This document provides an overview of WCDMA network measurements. It begins with an introduction to the evolution of mobile technologies leading to 3G WCDMA networks. It then discusses key aspects of WCDMA including its use of CDMA, channel structure, and differences from GSM. The document concludes by describing specific measurements that can be taken of WCDMA networks including code domain power, channel power, carrier frequency, and carrier feedthrough. These measurements help technicians evaluate WCDMA network performance and identify any issues.
The document discusses 3G systems and technologies including IMT-2000 performance requirements, WCDMA, CDMA2000, UMTS, and network architectures. Key points include minimum data rates of 144-384 kbps for IMT-2000, WCDMA uses CDMA with a 5 MHz bandwidth and supports data rates up to 2 Mbps, and UMTS network consists of the UE, UTRAN, and core network domains.
Maria D'cruz_WCDMA UMTS Wireless NetworksMaria D'cruz
The document provides an overview of WCDMA/UMTS architecture and radio resource management. It describes the evolution from 2G to 3G networks and the standardization of WCDMA. The key aspects of WCDMA air interface, UTRAN architecture, core network functionality, and radio resource management techniques like admission control, load control, packet scheduling, handover control and power control are summarized. Diagrams illustrate the system architecture and information flow between network elements.
The document discusses 3G network architecture, security, and handover between GSM and UMTS networks. It describes the key components of 3G network architecture including the user equipment and UTRAN consisting of layers like physical, MAC, RLC, and RRC layers. It explains the functions of the RRC layer including establishment of connections and allocation of resources. It also summarizes the functions of lower layers like RLC and MAC. Furthermore, it outlines the core network components including MSC, SGSN, GGSN and shared elements like HLR, EIR, and AuC. Finally, it briefly discusses the security mechanisms in 3G networks including network access, domain, and application layer security.
This document provides an overview of modern wireless communication systems, beginning with an outline of 1G, 2G, 2.5G, and 3G technologies. It then discusses 2G networks in more detail, including TDMA/FDD and CDMA/FDD standards used in 2G as well as pros and cons. 2.5G technologies brought increased data rates to 2G networks. 3G enabled faster speeds up to 2Mbps for voice, data, and video. The document also covers wireless fundamentals, modulation techniques including FDMA, TDMA, and CDMA, and the 3G W-CDMA and UMTS standards. Finally, it summarizes the GSM system architecture, including its
The document discusses 4G mobile communications standards including WiMAX and LTE. It provides information on:
- IEEE 802.22 which uses white spaces in TV frequencies for wireless regional area networks.
- Requirements for 4G standards defined by ITU including peak speeds of 1Gbps.
- How early versions of Mobile WiMAX and LTE did not meet the full 4G requirements but were still branded as 4G.
- Mobile WiMAX Release 2 and LTE Advanced promising speeds of 1Gbps in 2013.
The document discusses 4G mobile communications technologies WiMAX and LTE. It provides an overview of the IEEE 802.22 standard for wireless regional area networks using vacant TV channels. It also discusses the history and development of 4G standards, requirements for IMT-Advanced 4G, and early commercial versions of Mobile WiMAX and LTE that provided speeds less than 1 Gbit/s. It compares key aspects of 3G and 4G mobile networks.
The document provides an overview of advanced wireless networks and UMTS. It discusses the evolution from 2G to 3G networks, including the limitations of 2G and requirements for 3G. It describes the UMTS architecture, including the UTRAN, core network, and protocols on the Iu interface. It also covers basic UMTS principles such as CDMA techniques, radio resources including frequency, time, and power/code, and radio resource management.
The document provides an overview of the Global System for Mobile communications (GSM) including its history, architecture, key components, and technical aspects. It describes GSM concepts such as cellular structure and multiple access techniques. It also outlines the roles of core network elements like the HLR, VLR, MSC, BSC, BTS, and identifies interfaces between them. Finally, it covers topics like channel structure, encryption, and mobility management in GSM.
CDMA2000 is a 3G mobile technology standard that provides improved voice quality and support for multimedia services compared to previous standards like cdmaOne. It was approved as part of the IMT-2000 3G standard and first launched commercially in 2000. Today there are over 100 million CDMA2000 subscribers worldwide. It provides data transmission speeds of up to 2.4 Mbps using technologies like CDMA2000 1x and CDMA2000 1xEV-DO. The CDMA2000 network architecture includes elements like the PCF, PDSN, and HA to support both Simple IP and Mobile IP connectivity and provide packet data services to users.
TETRA is a trunked radio standard used in public safety networks. It allows for fast call setup, voice and data services, and operates in both infrastructure and ad-hoc modes. UMTS is the 3G cellular standard developed by ETSI for wide-area mobile communication. It uses W-CDMA technology and supports high data rates through variable spreading factors and orthogonal codes. UMTS has an architecture with domains for the user equipment, access network, core network and home network connected by defined interfaces.
This document provides an overview of cellular network technologies from 1G to 4G. It summarizes the evolution from analog 1G networks to digital 2G networks, then to 2.5G and 3G networks with increased data capabilities. 4G networks are described as providing further increased throughput through advanced technologies like OFDMA. Key multiple access technologies like FDMA, TDMA, CDMA used in different generations are explained. Popular cellular standards GSM and CDMA are discussed in detail along with their network architecture and capabilities. The transition from 2G to 2.5G to 3G using technologies like GPRS, EDGE is outlined. The goals and applications of 4G networks are described as fully converged services on a range
This document provides an overview of 3rd generation WCDMA/UMTS wireless networks. It describes the evolution from 2G to 3G networks and the key aspects of WCDMA/UMTS architecture, including the air interface, radio access network, core network and radio resource management functions such as admission control, load control, packet scheduling, handover control and power control. The document also briefly discusses additional topics such as radio network planning issues, high speed data packet access, and a comparison of WCDMA and CDMA2000.
This document provides an overview of a course on wireless and cellular communication focusing on CDMA technology. The course objectives are to understand wireless channel propagation, and analyze GSM, CDMA, and LTE systems. The document describes CDMA network architecture and operations, including initialization, registration, call establishment, call handoff, and 3G CDMA standards.
End-to-end pipeline agility - Berlin Buzzwords 2024Lars Albertsson
We describe how we achieve high change agility in data engineering by eliminating the fear of breaking downstream data pipelines through end-to-end pipeline testing, and by using schema metaprogramming to safely eliminate boilerplate involved in changes that affect whole pipelines.
A quick poll on agility in changing pipelines from end to end indicated a huge span in capabilities. For the question "How long time does it take for all downstream pipelines to be adapted to an upstream change," the median response was 6 months, but some respondents could do it in less than a day. When quantitative data engineering differences between the best and worst are measured, the span is often 100x-1000x, sometimes even more.
A long time ago, we suffered at Spotify from fear of changing pipelines due to not knowing what the impact might be downstream. We made plans for a technical solution to test pipelines end-to-end to mitigate that fear, but the effort failed for cultural reasons. We eventually solved this challenge, but in a different context. In this presentation we will describe how we test full pipelines effectively by manipulating workflow orchestration, which enables us to make changes in pipelines without fear of breaking downstream.
Making schema changes that affect many jobs also involves a lot of toil and boilerplate. Using schema-on-read mitigates some of it, but has drawbacks since it makes it more difficult to detect errors early. We will describe how we have rejected this tradeoff by applying schema metaprogramming, eliminating boilerplate but keeping the protection of static typing, thereby further improving agility to quickly modify data pipelines without fear.
Third Generation (3G) wireless systems focused on improving speed and effectiveness of critical communication over 3G standards - W-CDMA, UMTS, and CDMA2000. 4G provides even higher broadband speeds for live streaming, video conferencing, and location-based services. The document compares capabilities and standards of 3G and emerging 4G wireless technologies.
The document provides information on the fundamentals and evolution of 3G mobile communication standards. It discusses:
- 1st generation standards including AMPS, TACS, NMT, and others operating between 30-200 KHz.
- 2nd generation standards including GSM, IS-136, IS-95, and PDC operating at 200 KHz, utilizing TDMA and early digital technologies.
- UMTS (3G) evolution through 3GPP releases, utilizing WCDMA technology, and achieving speeds up to 2 Mbps through improvements like HSPA and LTE.
Modern Wireless Communication Systems
This document discusses the evolution of wireless communication systems from 1G to 4G. It provides details on each generation including the technologies used, key standards, capabilities and comparisons. 1G systems were analog and offered basic voice calls. 2G introduced digital networks and supported limited data. 2.5G enhanced 2G for higher speeds. 3G enabled multimedia and high-speed data using standards like W-CDMA, CDMA2000 and TD-SCDMA. 4G provides speeds up to 20 Mbps for improved multimedia services on mobile networks. The document also discusses short-range wireless technologies like Bluetooth and wireless LANs that operate without licensed spectrum.
The document discusses the development of 3G cellular networks and standards. The International Telecommunication Union (ITU) established the IMT-2000 standard to harmonize 3G systems worldwide and enable global roaming. IMT-2000 outlined performance targets for 3G networks to provide high-speed data and multimedia services to mobile users. Two main proposals were developed under IMT-2000: UMTS, backed by 3GPP in Europe, and CDMA2000, backed by 3GPP2 in North America and Asia.
This document provides an overview of WCDMA network measurements. It begins with an introduction to the evolution of mobile technologies leading to 3G WCDMA networks. It then discusses key aspects of WCDMA including its use of CDMA, channel structure, and differences from GSM. The document concludes by describing specific measurements that can be taken of WCDMA networks including code domain power, channel power, carrier frequency, and carrier feedthrough. These measurements help technicians evaluate WCDMA network performance and identify any issues.
The document discusses 3G systems and technologies including IMT-2000 performance requirements, WCDMA, CDMA2000, UMTS, and network architectures. Key points include minimum data rates of 144-384 kbps for IMT-2000, WCDMA uses CDMA with a 5 MHz bandwidth and supports data rates up to 2 Mbps, and UMTS network consists of the UE, UTRAN, and core network domains.
Maria D'cruz_WCDMA UMTS Wireless NetworksMaria D'cruz
The document provides an overview of WCDMA/UMTS architecture and radio resource management. It describes the evolution from 2G to 3G networks and the standardization of WCDMA. The key aspects of WCDMA air interface, UTRAN architecture, core network functionality, and radio resource management techniques like admission control, load control, packet scheduling, handover control and power control are summarized. Diagrams illustrate the system architecture and information flow between network elements.
The document discusses 3G network architecture, security, and handover between GSM and UMTS networks. It describes the key components of 3G network architecture including the user equipment and UTRAN consisting of layers like physical, MAC, RLC, and RRC layers. It explains the functions of the RRC layer including establishment of connections and allocation of resources. It also summarizes the functions of lower layers like RLC and MAC. Furthermore, it outlines the core network components including MSC, SGSN, GGSN and shared elements like HLR, EIR, and AuC. Finally, it briefly discusses the security mechanisms in 3G networks including network access, domain, and application layer security.
This document provides an overview of modern wireless communication systems, beginning with an outline of 1G, 2G, 2.5G, and 3G technologies. It then discusses 2G networks in more detail, including TDMA/FDD and CDMA/FDD standards used in 2G as well as pros and cons. 2.5G technologies brought increased data rates to 2G networks. 3G enabled faster speeds up to 2Mbps for voice, data, and video. The document also covers wireless fundamentals, modulation techniques including FDMA, TDMA, and CDMA, and the 3G W-CDMA and UMTS standards. Finally, it summarizes the GSM system architecture, including its
The document discusses 4G mobile communications standards including WiMAX and LTE. It provides information on:
- IEEE 802.22 which uses white spaces in TV frequencies for wireless regional area networks.
- Requirements for 4G standards defined by ITU including peak speeds of 1Gbps.
- How early versions of Mobile WiMAX and LTE did not meet the full 4G requirements but were still branded as 4G.
- Mobile WiMAX Release 2 and LTE Advanced promising speeds of 1Gbps in 2013.
The document discusses 4G mobile communications technologies WiMAX and LTE. It provides an overview of the IEEE 802.22 standard for wireless regional area networks using vacant TV channels. It also discusses the history and development of 4G standards, requirements for IMT-Advanced 4G, and early commercial versions of Mobile WiMAX and LTE that provided speeds less than 1 Gbit/s. It compares key aspects of 3G and 4G mobile networks.
The document provides an overview of advanced wireless networks and UMTS. It discusses the evolution from 2G to 3G networks, including the limitations of 2G and requirements for 3G. It describes the UMTS architecture, including the UTRAN, core network, and protocols on the Iu interface. It also covers basic UMTS principles such as CDMA techniques, radio resources including frequency, time, and power/code, and radio resource management.
The document provides an overview of the Global System for Mobile communications (GSM) including its history, architecture, key components, and technical aspects. It describes GSM concepts such as cellular structure and multiple access techniques. It also outlines the roles of core network elements like the HLR, VLR, MSC, BSC, BTS, and identifies interfaces between them. Finally, it covers topics like channel structure, encryption, and mobility management in GSM.
CDMA2000 is a 3G mobile technology standard that provides improved voice quality and support for multimedia services compared to previous standards like cdmaOne. It was approved as part of the IMT-2000 3G standard and first launched commercially in 2000. Today there are over 100 million CDMA2000 subscribers worldwide. It provides data transmission speeds of up to 2.4 Mbps using technologies like CDMA2000 1x and CDMA2000 1xEV-DO. The CDMA2000 network architecture includes elements like the PCF, PDSN, and HA to support both Simple IP and Mobile IP connectivity and provide packet data services to users.
TETRA is a trunked radio standard used in public safety networks. It allows for fast call setup, voice and data services, and operates in both infrastructure and ad-hoc modes. UMTS is the 3G cellular standard developed by ETSI for wide-area mobile communication. It uses W-CDMA technology and supports high data rates through variable spreading factors and orthogonal codes. UMTS has an architecture with domains for the user equipment, access network, core network and home network connected by defined interfaces.
This document provides an overview of cellular network technologies from 1G to 4G. It summarizes the evolution from analog 1G networks to digital 2G networks, then to 2.5G and 3G networks with increased data capabilities. 4G networks are described as providing further increased throughput through advanced technologies like OFDMA. Key multiple access technologies like FDMA, TDMA, CDMA used in different generations are explained. Popular cellular standards GSM and CDMA are discussed in detail along with their network architecture and capabilities. The transition from 2G to 2.5G to 3G using technologies like GPRS, EDGE is outlined. The goals and applications of 4G networks are described as fully converged services on a range
This document provides an overview of 3rd generation WCDMA/UMTS wireless networks. It describes the evolution from 2G to 3G networks and the key aspects of WCDMA/UMTS architecture, including the air interface, radio access network, core network and radio resource management functions such as admission control, load control, packet scheduling, handover control and power control. The document also briefly discusses additional topics such as radio network planning issues, high speed data packet access, and a comparison of WCDMA and CDMA2000.
This document provides an overview of a course on wireless and cellular communication focusing on CDMA technology. The course objectives are to understand wireless channel propagation, and analyze GSM, CDMA, and LTE systems. The document describes CDMA network architecture and operations, including initialization, registration, call establishment, call handoff, and 3G CDMA standards.
End-to-end pipeline agility - Berlin Buzzwords 2024Lars Albertsson
We describe how we achieve high change agility in data engineering by eliminating the fear of breaking downstream data pipelines through end-to-end pipeline testing, and by using schema metaprogramming to safely eliminate boilerplate involved in changes that affect whole pipelines.
A quick poll on agility in changing pipelines from end to end indicated a huge span in capabilities. For the question "How long time does it take for all downstream pipelines to be adapted to an upstream change," the median response was 6 months, but some respondents could do it in less than a day. When quantitative data engineering differences between the best and worst are measured, the span is often 100x-1000x, sometimes even more.
A long time ago, we suffered at Spotify from fear of changing pipelines due to not knowing what the impact might be downstream. We made plans for a technical solution to test pipelines end-to-end to mitigate that fear, but the effort failed for cultural reasons. We eventually solved this challenge, but in a different context. In this presentation we will describe how we test full pipelines effectively by manipulating workflow orchestration, which enables us to make changes in pipelines without fear of breaking downstream.
Making schema changes that affect many jobs also involves a lot of toil and boilerplate. Using schema-on-read mitigates some of it, but has drawbacks since it makes it more difficult to detect errors early. We will describe how we have rejected this tradeoff by applying schema metaprogramming, eliminating boilerplate but keeping the protection of static typing, thereby further improving agility to quickly modify data pipelines without fear.
Codeless Generative AI Pipelines
(GenAI with Milvus)
https://ml.dssconf.pl/user.html#!/lecture/DSSML24-041a/rate
Discover the potential of real-time streaming in the context of GenAI as we delve into the intricacies of Apache NiFi and its capabilities. Learn how this tool can significantly simplify the data engineering workflow for GenAI applications, allowing you to focus on the creative aspects rather than the technical complexities. I will guide you through practical examples and use cases, showing the impact of automation on prompt building. From data ingestion to transformation and delivery, witness how Apache NiFi streamlines the entire pipeline, ensuring a smooth and hassle-free experience.
Timothy Spann
https://www.youtube.com/@FLaNK-Stack
https://medium.com/@tspann
https://www.datainmotion.dev/
milvus, unstructured data, vector database, zilliz, cloud, vectors, python, deep learning, generative ai, genai, nifi, kafka, flink, streaming, iot, edge
State of Artificial intelligence Report 2023kuntobimo2016
Artificial intelligence (AI) is a multidisciplinary field of science and engineering whose goal is to create intelligent machines.
We believe that AI will be a force multiplier on technological progress in our increasingly digital, data-driven world. This is because everything around us today, ranging from culture to consumer products, is a product of intelligence.
The State of AI Report is now in its sixth year. Consider this report as a compilation of the most interesting things we’ve seen with a goal of triggering an informed conversation about the state of AI and its implication for the future.
We consider the following key dimensions in our report:
Research: Technology breakthroughs and their capabilities.
Industry: Areas of commercial application for AI and its business impact.
Politics: Regulation of AI, its economic implications and the evolving geopolitics of AI.
Safety: Identifying and mitigating catastrophic risks that highly-capable future AI systems could pose to us.
Predictions: What we believe will happen in the next 12 months and a 2022 performance review to keep us honest.
Learn SQL from basic queries to Advance queriesmanishkhaire30
Dive into the world of data analysis with our comprehensive guide on mastering SQL! This presentation offers a practical approach to learning SQL, focusing on real-world applications and hands-on practice. Whether you're a beginner or looking to sharpen your skills, this guide provides the tools you need to extract, analyze, and interpret data effectively.
Key Highlights:
Foundations of SQL: Understand the basics of SQL, including data retrieval, filtering, and aggregation.
Advanced Queries: Learn to craft complex queries to uncover deep insights from your data.
Data Trends and Patterns: Discover how to identify and interpret trends and patterns in your datasets.
Practical Examples: Follow step-by-step examples to apply SQL techniques in real-world scenarios.
Actionable Insights: Gain the skills to derive actionable insights that drive informed decision-making.
Join us on this journey to enhance your data analysis capabilities and unlock the full potential of SQL. Perfect for data enthusiasts, analysts, and anyone eager to harness the power of data!
#DataAnalysis #SQL #LearningSQL #DataInsights #DataScience #Analytics
ViewShift: Hassle-free Dynamic Policy Enforcement for Every Data LakeWalaa Eldin Moustafa
Dynamic policy enforcement is becoming an increasingly important topic in today’s world where data privacy and compliance is a top priority for companies, individuals, and regulators alike. In these slides, we discuss how LinkedIn implements a powerful dynamic policy enforcement engine, called ViewShift, and integrates it within its data lake. We show the query engine architecture and how catalog implementations can automatically route table resolutions to compliance-enforcing SQL views. Such views have a set of very interesting properties: (1) They are auto-generated from declarative data annotations. (2) They respect user-level consent and preferences (3) They are context-aware, encoding a different set of transformations for different use cases (4) They are portable; while the SQL logic is only implemented in one SQL dialect, it is accessible in all engines.
#SQL #Views #Privacy #Compliance #DataLake
Predictably Improve Your B2B Tech Company's Performance by Leveraging DataKiwi Creative
Harness the power of AI-backed reports, benchmarking and data analysis to predict trends and detect anomalies in your marketing efforts.
Peter Caputa, CEO at Databox, reveals how you can discover the strategies and tools to increase your growth rate (and margins!).
From metrics to track to data habits to pick up, enhance your reporting for powerful insights to improve your B2B tech company's marketing.
- - -
This is the webinar recording from the June 2024 HubSpot User Group (HUG) for B2B Technology USA.
Watch the video recording at https://youtu.be/5vjwGfPN9lw
Sign up for future HUG events at https://events.hubspot.com/b2b-technology-usa/
The Building Blocks of QuestDB, a Time Series Databasejavier ramirez
Talk Delivered at Valencia Codes Meetup 2024-06.
Traditionally, databases have treated timestamps just as another data type. However, when performing real-time analytics, timestamps should be first class citizens and we need rich time semantics to get the most out of our data. We also need to deal with ever growing datasets while keeping performant, which is as fun as it sounds.
It is no wonder time-series databases are now more popular than ever before. Join me in this session to learn about the internal architecture and building blocks of QuestDB, an open source time-series database designed for speed. We will also review a history of some of the changes we have gone over the past two years to deal with late and unordered data, non-blocking writes, read-replicas, or faster batch ingestion.
6. 3G- Advantages
3G phones promise :-
Improved digital voice communications
Larger Bandwidth – Higher Data rate
Greater subscriber capacity
Fast packet-based data services like e-mail, short message
service (SMS), and Internet access at broadband speeds.
Most carriers also expect consumers to want :-
• location services
• interactive gaming
• streaming video
• home monitoring and control
• and who knows what else, while being fully mobile anywhere in the
world.
7. 3G Capabilities
Voice quality comparable to the public switched
telephone network
144 Kbps- user in high-speed motor vehicles
384 Kbps- pedestrians standing or moving slowly
over small areas
Up to 2 Mbps- fixed applications like office use
Symmetrical/asymmetrical data transmission rates
Support for both packet switched and circuit switched
data services like Internet Protocol (IP) traffic and
real time video
8. Organizations
• 3G is also known as UMTS (Universal Mobile
Telecommunication System)
• 3GPP 3rd Generation Partnership Project.
• 3GPP2 3rd Generation Partnership Project 2
• Internet Engineering Taskforce (IETF)
• ITU-IMT-2000 Standard (International
Telecommunication Union- International Mobile
Telecommunication)
11. Technologies
3G is superior to the other digital standards like:-
• GSM (Global System for Mobile) communications standard used worldwide
• And IS-136 TDMA standard used primarily in North America.
3G Technologies:-
• WCDMA or UMTS-FDD (Universal Mobile Telecommunications System -
Frequency Division Duplex)---Direct Spread
• CDMA2000 - 1x-EvDO/EvDV---Multi carrier
• UMTS – TDD (Time Division Duplex) or TD-SCDMA (Time Division -
Synchronous Code Division Multiple Access) ---Time Code
4G Technologies:-
• Digital Audio Broadcast (DAB) and Digital Video Broadcast (DVB) for wide
area broadcasting
• Local Multipoint Distribution System (LMDS)
• Microwave Multipoint Distribution System (MMDS)
15. UMTS-FDD / WCDMA
Wideband Direct Sequence Code Division
Multiple Access
Does not assign a specific frequency to each
user. Instead every channel uses the full
available spectrum. Individual conversations
are encoded with a pseudo-random digital
sequence
Narrowband option for TDD.
16. WCDMA Parameters
Channel B.W 5 MHz
Forward RF Channel Structure Direct Spread
Chip Rate 3.84 Mcps
Frame Length 10 ms (38400 chips)
No. of slots/frame 15
No. of chips/slot 2560chips (Max. 2560 bits)
Power Control Open and fast close loop (1.6
KHz)
Uplink SF 4 to 256
Downlink SF 4 to 512
17. Spreading Operation
Spreading means increasing the signal bandwidth
Strictly speaking, spreading includes two operations:
(1) Channelisation (increases signal bandwidth)
- using orthogonal codes
(2) Scrambling (does not affect the signal bandwidth)
- using pseudo noise codes
18. Codes
Channellization Code Scrambling Code
Usage UL: Separation of physical data
and control channels from same UE
DL: Separation of different users
within one cell
UL: Separation of terminals
DL: Separation of
cells/sectors
Length UL:4-256 chips
DL:4-512 chips
38400 chips
No. of
codes
No. of codes under one scrambling code=
SF
UL: Several million
DL: 512
Code
Family
Orthogonal Variable Spreading Factor Long 10ms code: Gold
code
Short code: Extended S(2)
code Family
Increase
B.W?
YES NO
22. Physical Layer
The physical layer offers information transfer services to the
MAC layer. These services are denoted as Transport channels
(TrCh’s). There are also Physical channels.
Physical layer comprises following functions:
• Various handover functions
• Error detection and report to higher layers
• Multiplexing of transport channels
• Mapping of transport channels to physical channels
• Fast Close loop Power control
• Frequency and Time Synchronization
• Other responsibilities associated with transmitting
and receiving signals over the wireless media.
23. Transport & Physical Channels
Transport Channel Physical Channel
(UL/DL) Dedicated Channel DCH Dedicated Physical Data Channel DPDCH
Dedicated Physical Control Channel DPCCH
(UL) Random Access Channel RACH Physical random access channel PRACH
(UL) Common packet channel CPCH Physical common packet channel PCPCH
(DL) Broadcast channel BCH Primary common control physical channel P-CCPCH
(DL) Forward access channel FACH
(DL) Paging channel PCH
Secondary common control physical channel S-CCPCH
(DL) Downlink shared channel DSCH Physical downlink shared channel PDSCH
Signaling physical channels
Synchronization channel SCH
Common pilot channel CPICH
Acquisition indication channel AICH
Paging indication channel PICH
CPCH Status indication channel CSICH
Collision detection/Channel assignment indicator
channel CD/CA-ICH
25. MAC Layer
The MAC layer offers Data transfer to RLC and higher layers.
The MAC layer comprises the following functions:
• Selection of appropriate TF (basically bit rate), within a predefined set,
per information unit delivered to the physical layer
• Service multiplexing on RACH, FACH, and dedicated channels
• Priority handling between ‘data flows’ of one user as well as between
data flows from several users—the latter being achieved by means of
dynamic scheduling
• Access control on RACH
• Address control on RACH and FACH
• Contention resolution on RACH
27. RLC Layer
The RLC layer offers the following services to the higher
layers:
• Layer 2 connection establishment/release
• Transparent data transfer, i.e., no protocol overhead is appended to the
information unit received from the higher layer
• Assured and un assured data transfer
The RLC layer comprises the following functions:
• Segmentation and assembly
• Transfer of user data
• Error correction by means of retransmission optimized for the
WCDMA physical layer
• Sequence integrity (used by at least the control plane)
• Duplicate detection
• Flow control
• Ciphering
29. RRC Layer
The RRC layer offers the core network the following services:
• General control service, which is used as an information broadcast
service
• Notification service, which is used for paging and notification of a
selected UEs
• Dedicated control service, which is used for establishment/release of a
connection and transfer of messages using the connection.
The RRC layer comprises the following functions:
• Broadcasting information from network to all UEs
• Radio resource handling (e.g., code allocation, handover, admission
control, and measurement reporting/control)
• QoS Control
• UE measurement reporting and control of the reporting
• Power Control, Encryption and Integrity protection
31. Hand Over
Intra-mode handover
• Include soft handover, softer handover and hard
handover.
• Rely on the Ec/No measurement performed from
the CPICH.
Inter-mode handover
• Handover to the UTRA TDD mode.
Inter-system handover
• Handover to other system, such as GSM.
• Make measurement on the frequency during
compressed mode.
33. Power Control
Fast Closed Loop PC – Inner Loop PC
• Feedback information.
• Uplink PC is used for near-far problem. Downlink PC is to
ensure that there is enough power for mobiles at the cell
edge.
Two special cases for fast closed loop PC:
• Soft handover:- how to react to multiple power control
commands from several sources. At the mobile, a “power
down” command has higher priority over “power up”
command.
• Compressed mode:- Large step size is used after a
compressed frame to allow the power level to converge
more quickly to the correct value after the break.
34. Power Control (Contd.)
Open loop PC
• No feedback information.
• Make a rough estimate of the path loss by means
of a downlink beacon signal.
• Provide a coarse initial power setting of the mobile
at the beginning of a connection.
• Apply only prior to initiating the transmission on
RACH or CPCH.
36. UMTS/WCDMA QoS
The standard provides an overview of the
functionality needed to establish, modify and
maintain a UMTS link with a specific QoS.
Divided into:
• Control plane
Managing, translating, admitting and controlling users
requests and network resources.
• User plane
QoS signaling and monitoring of user data traffic
37. QoS Classes
Conversational (real time):-
• VoIP
• Telephony
• Video conferencing
Streaming (real time):-
• Video and audio streams
Interactive:-
• Web browsing
• Data retrieval
• Server access
Background:-
• Download of emails and files
38. What next after 3G?
1990 2000 2010
GSM
(2G)
W-CDMA
(3G)
GPRS/
EDGE
(2.5G)
• The future path has fractured
into a number of possibilities
• Operators and vendors must
create viable strategies to
prosper within this complexity
4G
3G+
3G &
WLAN
3G &
WLAN &
Brdcst
3G+ &
WLAN
3G &
WLAN &
Ad-hoc
3G+ &
WLAN &
Ad-hoc
4G &
WLAN
4G &
WLAN &
Brdcst
4G &
WLAN &
Ad-hoc
2.5G &
WLAN
39. 4G Air Interface
Higher bit rates than 3G (20 Mbps < peak < 200 Mbps)
Higher spectral efficiency and Lower Cost per bit than 3G
Air interface and MAC optimized for IP traffic
• Adaptive modulation/coding with power control, hybrid ARQ
Smaller cells, on average, than 3G
• However, cell size will be made as large as possible via:
High power base station to boost downlink range
Asymmetry - used to boost uplink range when necessary
Adaptive antennas option
Higher frequency band than 3G (below 5 GHz preferred)
RF channel bandwidths of 20 MHz and higher
Frequency Domain methods:
• OFDM is promising for downlink
40. OFDM
Divides the spectrum into a number of equally spaced tones.
Each tone carries a portion of data.
A kind of FDMA, but each tone is orthogonal with every other
tone. Tones can overlap each other.
Example: 802.11a WLAN
41. Summary
3G wireless services are rapidly spreading the global market place with CDMA as the
preferred technology solution
The following are the key 3G Technologies that have emerged to be the key commercial
players:
• CDMA2000 1X
• CDMA2000 1xEV-DO
• UMTS/WCDMA
WCDMA is one of them, which provides:-
• Larger Bandwidth – Higher Data rate – Lower cost
• Greater subscriber capacity
• IMT-2000 Radio interface standard offers 3G standard
• Hand Over, Power Control problems are addressed
• QoS offered But Customers really want them?
4G still in a formative stage (commercial 2010)
Frequency bands less than 5 GHz preferred for wide-area, mobile services
4G system bandwidth between 20 and 100 MHz
Lower cost per bit than 3G
42. References
Websites:-
http://www.sss-mag.com
www.electronicdesign.com
www.3g-generation.com
www.3gtoday.com
http://www.pctechguide.com
Articles:-
Latest Trends and New Enhancements in 3G Wireless Communications- By Rao Yallapragada, QualComm
WCDMA—The Radio Interface for Future Mobile Multimedia Communications-By Erik Dahlman, Per
Beming, Jens Knutsson, Fredrik Ovesj¨o, Magnus Persson, and Christiaan Roobol
UMTS -Mobile Telematics 2004-Anne Nevin
Fourth Generation Cellular Systems:
Spectrum Requirements-By Joseph M. Nowack-Motorola Labs
IMT Project. What is IMT-2000, Geneva-2001
WCDMA-Physical Layer- By Peter Chong, Ph.D. (UBC, Canada)
3G-4G wireless, COMPT 880 Presentation- By Simon Xin Cheng,Simon Fraser University