Mobile networks use radio frequencies to allow cellular devices to connect to a network of base stations. Base stations transmit and receive signals within assigned frequency bands to serve mobile terminals in a given coverage area. As terminals move between areas covered by different base stations, the network performs handoffs to transfer service to the closest base station. A study measured the impact of mobility on HSPA networks, finding that mobility reduced available bandwidth for users on public transportation due to increased handoffs and interference between cells.
Mobile phones connect to a cellular network by communicating with nearby base stations using radio frequencies, with each base station serving an area called a cell, and cellular networks have evolved through generations from analog 1G networks to current digital 4G networks that provide high-speed wireless internet access.
This document provides a summary of lectures on cellular networks given at the Department of Electrical Engineering at University of Qatar. It discusses the basics of cellular networks including multiple access techniques used like FDMA, TDMA, and CDMA. It describes the evolution of cellular technologies from 1G to 4G including GSM, 3G, HSPA, and LTE. Key aspects covered include network architecture, frequency bands, protocols, and mobility management in cellular systems.
The document provides an overview of mobile handset cellular networks, including the evolution from 2G to 4G networks. It describes key aspects of 2G GSM networks such as architecture, channels, protocols and short message service. It also summarizes the development of 3G UMTS networks and 4G LTE networks, outlining their technical improvements over previous generations including increased data rates and new multiple access technologies.
The document provides an overview of mobile cellular networks from 1G to 4G technologies. It discusses the basics of cellular networks including frequency bands, cells, and handoffs. It then describes the multiple access schemes used in different generations including FDMA in 1G, TDMA in 2G, and CDMA in 3G. It provides details on 2G GSM network standards, protocols, and architecture. It also summarizes the evolution from 2G to 3G UMTS and 3.5G HSPA networks as well as the 4G LTE technology including its advantages over previous standards.
Mobile networks have evolved through generations from 0G to 4G. 2G networks like GSM used frequency division multiple access and provided basic voice and SMS services. 3G networks such as UMTS enabled higher speed digital services using WCDMA technology. Between 2G and 3G, networks added technologies like GPRS, EDGE, and HSDPA (3.5G) to improve speeds. 4G networks like LTE provide broadband access using OFDM and MIMO with speeds over 100 Mbps for voice, data and multimedia services on all-IP networks.
The document provides an overview of basic telecommunications systems and concepts. It describes how early communication methods used visual signals like smoke signals. A basic telecom system consists of a transmitter that converts information to a signal, a transmission medium that carries the signal, and a receiver that converts the signal back to usable information. Common types of multiplexing that allow multiple signals to share a channel are frequency-division, time-division, and code-division multiple access. Global System for Mobile Communication (GSM) is an accepted standard for digital cellular networks consisting of switching systems, base station systems, and mobile handsets.
This presentation is all about GSM (Global System for mobile Communication). All components, entities ,architecture ,advantages of GSM, future of GSM was the main focus.
Call routing for incoming and outgoing call is also included in the presentation.
Mobile phones connect to a cellular network by communicating with nearby base stations using radio frequencies, with each base station serving an area called a cell, and cellular networks have evolved through generations from analog 1G networks to current digital 4G networks that provide high-speed wireless internet access.
This document provides a summary of lectures on cellular networks given at the Department of Electrical Engineering at University of Qatar. It discusses the basics of cellular networks including multiple access techniques used like FDMA, TDMA, and CDMA. It describes the evolution of cellular technologies from 1G to 4G including GSM, 3G, HSPA, and LTE. Key aspects covered include network architecture, frequency bands, protocols, and mobility management in cellular systems.
The document provides an overview of mobile handset cellular networks, including the evolution from 2G to 4G networks. It describes key aspects of 2G GSM networks such as architecture, channels, protocols and short message service. It also summarizes the development of 3G UMTS networks and 4G LTE networks, outlining their technical improvements over previous generations including increased data rates and new multiple access technologies.
The document provides an overview of mobile cellular networks from 1G to 4G technologies. It discusses the basics of cellular networks including frequency bands, cells, and handoffs. It then describes the multiple access schemes used in different generations including FDMA in 1G, TDMA in 2G, and CDMA in 3G. It provides details on 2G GSM network standards, protocols, and architecture. It also summarizes the evolution from 2G to 3G UMTS and 3.5G HSPA networks as well as the 4G LTE technology including its advantages over previous standards.
Mobile networks have evolved through generations from 0G to 4G. 2G networks like GSM used frequency division multiple access and provided basic voice and SMS services. 3G networks such as UMTS enabled higher speed digital services using WCDMA technology. Between 2G and 3G, networks added technologies like GPRS, EDGE, and HSDPA (3.5G) to improve speeds. 4G networks like LTE provide broadband access using OFDM and MIMO with speeds over 100 Mbps for voice, data and multimedia services on all-IP networks.
The document provides an overview of basic telecommunications systems and concepts. It describes how early communication methods used visual signals like smoke signals. A basic telecom system consists of a transmitter that converts information to a signal, a transmission medium that carries the signal, and a receiver that converts the signal back to usable information. Common types of multiplexing that allow multiple signals to share a channel are frequency-division, time-division, and code-division multiple access. Global System for Mobile Communication (GSM) is an accepted standard for digital cellular networks consisting of switching systems, base station systems, and mobile handsets.
This presentation is all about GSM (Global System for mobile Communication). All components, entities ,architecture ,advantages of GSM, future of GSM was the main focus.
Call routing for incoming and outgoing call is also included in the presentation.
Global System For Mobile Communication by Ummer &MaroofUmmer Rashid Dar
Global System For Mobile Communication
By: Ummer Rashid Dar & Maroof Bashir Bhat
M.tech (ECE) ,1st year .
Pounduchery University.
Dept.of Electronics Engineering .
605014
What is GSM?
The Global System for Mobile communications is a digital cellular communications system. It was developed in order to create a common European mobile telephone standard but it has been rapidly accepted worldwide.
Formerly it was “Groupe Spéciale Mobile” (founded in 1982)
now: Global System for Mobile Communication.
Services:
Tele-services
Bearer or Data Services
Supplementary services
Applications:
Mobile telephony
GSM-R
Telemetry System
- Fleet management
- Automatic meter reading
- Toll Collection
- Remote control and fault reporting of DG sets
Value Added Services
Advantages:
Better Quality of speech
Data transmission is supported
New services offered due to ISDN compatibility
International Roaming possible
Large market
Crisper, cleaner quieter calls
disadvantages:
Dropped and missed calls
Less Efficiency
Security Issues
conclusion
The mobile telephony industry rapidly growing and that has become backbone for business success and efficiency and a part of modern lifestyles all over the world.
In this session I have tried to give and over view of the GSM system. I hope that I gave the general flavor of GSM and the philosophy behind its design.
The GSM is standard that insures interoperability without stifling competition and innovation among the suppliers to the benefit of the public both in terms of cost and service quality.
The document provides an overview of the GSM network including its history, architecture, technical specifications, and applications. It discusses the key components of GSM including the mobile station, base station subsystem, network switching subsystem, logical and physical channels, and security features. The architecture consists of the mobile station, base station subsystem with BTS and BSC, and the network switching subsystem including the MSC, HLR, VLR, and AUC. GSM uses TDMA and FDMA and operates in the 900/1800MHz spectrum. It provides voice and data services and allows international roaming.
Global system for mobile communication(GSM)Jay Nagar
~Introduction
~GSM Architecture
~GSM Entities
~SMS Service In GSM
~Call Routing In GSM
~PLMN Interfaces
~GSM Addresses and Identifiers
~Network aspects in GSM
~Handover
~Mobility Management
~GSM Frequency Allocation
~Authentication and Security In GSM
This document provides an introduction to GSM networks and their history. It discusses [1] the origins and evolution of cellular networks prior to GSM, [2] the formation of GSM in 1982 to develop a pan-European cellular standard, and [3] the key phases and advances of GSM technology over time, including digital voice services, SMS, and mobile data. The document also outlines some of the main advantages of GSM networks, including international roaming, security, voice quality, and their use of a single global standard.
GSM is a 2G mobile communication system that provides voice and data services. It uses TDMA and FDMA to allow multiple users to access the network simultaneously. The key components of a GSM network are the radio subsystem including the BTS, BSC and MS; the network and switching subsystem including the MSC, HLR, VLR; and the operation subsystem including the OMC, AuC and EIR. GSM provides services like telephony, SMS, and data transmission using bearer channels while ensuring security, anonymity and authentication of users.
The document discusses GSM (Global System for Mobile Communication), including its definition as a 2G cellular standard, system architecture with components like the mobile station, base station subsystem, and network subsystem, basic features like call waiting and advanced features like roaming, future developments like UMTS, and advantages like international roaming capabilities and efficient use of spectrum.
This document provides an overview of digital switching systems and digital transmission systems. It discusses how telecommunication networks have transitioned from analog to digital technologies. Key topics covered include digital switching systems, components of transmission networks like digital distribution frames, synchronous digital hierarchy for digital transmission, and fiber-to-the-home (FTTH) technologies using dense wavelength division multiplexing (DWDM) to transmit multiple signals over fiber. The document is intended as an educational reference on modern digital telecommunication systems and technologies.
This document provides an overview of the GSM architecture, which includes the mobile station, base station subsystem, and network switching subsystem. The mobile station contains the mobile equipment and subscriber identity module. The base station subsystem consists of the base transceiver station and base station controller. The network switching subsystem contains the mobile switching center, home location register, visitor location register, authentication center, and equipment identity register. The interfaces between these subsystems enable communication and functionality across the different elements of the GSM network.
The GSM network architecture consists of three major subsystems: the network and switching subsystem (NSS), the base station subsystem (BSS), and the operation and support subsystem (OSS). The BSS is composed of the base transceiver station (BTS), base station controller (BSC), and transcoder (TCU/TRAU). The BTS handles radio transmission/reception, the BSC manages radio resources and handles radio call processing, and the TCU converts between GSM and PSTN/ISDN formats. The NSS contains the mobile switching center (MSC), home location register (HLR), visitor location register (VLR), and equipment identity register (EIR), which manage subscriber
Global System for Mobile Communications (GSM) is a digital cellular network developed to provide digital wireless voice and data services. It was designed to be a digital (wide area) wireless network driven by European Telecom manufacturers, operators, and standardization committees. GSM uses a combination of time division multiple access and frequency division multiple access and has become widely used around the world.
The GSM radio interface uses FDMA to divide the frequency band into channels and TDMA to divide each frequency channel into time slots to allow multiple users, with each user assigned a single time slot. The normal GSM burst carries digitized voice data or other information in a 57-bit data field, and includes guard periods and training sequences to help with timing synchronization and equalization between the mobile station and base transceiver station. GSM networks operate at different frequencies around the world, with GSM-900 being most common in Europe and other parts of the world.
GSM(Global system for mobile communication ) is a second generation cellular standard developed to cater voice services and data delivery using digital modulation.
GSM - (CHARACTERISITCS, FEATURES & ADVANTAGES AND DISADVANTAGES)kalpanait16
This document discusses the characteristics, features, advantages, and disadvantages of GSM. The key characteristics of GSM include it being a fully digital system, providing security against fraud and enhanced privacy, full international roaming capability, support for new services, and support of short message service. The advantages are better quality of speech, support for data transmission and new digital services, international roaming ability, and a large market. However, some disadvantages include dropped and missed calls, less efficiency in dense areas, and potential security issues.
Topics covered in this presentation:
What is a Base Transceiver Station ?
Components of any BTS
BTS transceiver, BTS O&M module, clock module
BTS Transmitter and Receiver Characteristics
BTS configurations
BTS functions and Protocols on Um and Abis Interface
BTS security aspects
Lectures on 2 g,3g,3.5g,4g By Professor Dr Arshad Abbas KhanProfArshadAbbas
This document provides a summary of lectures on cellular networks given at the Department of Electrical Engineering at University of Qatar. It discusses the basics of cellular networks including frequency bands used, multiple access techniques like FDMA, TDMA, and CDMA. It describes the evolution of cellular technologies from 1G to 4G including GSM, 3G UMTS, HSPA 3.5G, and LTE 4G. Key aspects of these technologies like their network architecture, protocols, and frequency spectrums are summarized. The document concludes with a case study on the impact of user mobility on bandwidth sharing in HSPA networks for mobile users on public transportation.
1. Cellular networks use multiple base stations that transmit and receive from mobile devices using assigned frequencies to allow frequency reuse and increase both coverage and capacity.
2. Multiple access schemes like FDMA, TDMA, and CDMA allow multiple users to access the network simultaneously by dividing the available bandwidth.
3. Generations of cellular networks have increased capabilities with 2G supporting digital signals and data, 3G allowing faster data rates including video calls, and 4G providing high-speed multimedia access.
GSM is a second generation cellular technology developed to provide digital voice and data services using TDMA and FDMA. It initially provided circuit switched services but later added packet switched capabilities with GPRS. The key components of GSM are the mobile station, base station subsystem including base transceiver stations and base station controllers, and the network switching subsystem centered around mobile switching centers and databases like HLR, VLR, EIR and AUC. GSM supports various voice and data services as well as supplementary services and saw continual upgrades over time to improve data capabilities.
This presentation covers:
How evolution has happened from First Generation Mobile Communication Systems to present day 3G/UMTS/WCMDA systems
Brief introduction of each Generation: GSM - 2G, 2.5 G - GPRS, 2.75G - EDGE, 3G and then LTE/4G
GSM is a 2G mobile communication system that provides voice and data services using radio frequency bands between 800-2000MHz. It has a three-part architecture including the radio subsystem with mobile stations, base stations and controllers; the network and switching subsystem with mobile switching centers and registers; and the operation subsystem for network management. Key protocols used in GSM include LAPDm for signaling, mobility management for registration and location updating, and call management for call establishment and control. GSM provides location tracking as users roam between different visitor location registers.
Global System For Mobile Communication by Ummer &MaroofUmmer Rashid Dar
Global System For Mobile Communication
By: Ummer Rashid Dar & Maroof Bashir Bhat
M.tech (ECE) ,1st year .
Pounduchery University.
Dept.of Electronics Engineering .
605014
What is GSM?
The Global System for Mobile communications is a digital cellular communications system. It was developed in order to create a common European mobile telephone standard but it has been rapidly accepted worldwide.
Formerly it was “Groupe Spéciale Mobile” (founded in 1982)
now: Global System for Mobile Communication.
Services:
Tele-services
Bearer or Data Services
Supplementary services
Applications:
Mobile telephony
GSM-R
Telemetry System
- Fleet management
- Automatic meter reading
- Toll Collection
- Remote control and fault reporting of DG sets
Value Added Services
Advantages:
Better Quality of speech
Data transmission is supported
New services offered due to ISDN compatibility
International Roaming possible
Large market
Crisper, cleaner quieter calls
disadvantages:
Dropped and missed calls
Less Efficiency
Security Issues
conclusion
The mobile telephony industry rapidly growing and that has become backbone for business success and efficiency and a part of modern lifestyles all over the world.
In this session I have tried to give and over view of the GSM system. I hope that I gave the general flavor of GSM and the philosophy behind its design.
The GSM is standard that insures interoperability without stifling competition and innovation among the suppliers to the benefit of the public both in terms of cost and service quality.
The document provides an overview of the GSM network including its history, architecture, technical specifications, and applications. It discusses the key components of GSM including the mobile station, base station subsystem, network switching subsystem, logical and physical channels, and security features. The architecture consists of the mobile station, base station subsystem with BTS and BSC, and the network switching subsystem including the MSC, HLR, VLR, and AUC. GSM uses TDMA and FDMA and operates in the 900/1800MHz spectrum. It provides voice and data services and allows international roaming.
Global system for mobile communication(GSM)Jay Nagar
~Introduction
~GSM Architecture
~GSM Entities
~SMS Service In GSM
~Call Routing In GSM
~PLMN Interfaces
~GSM Addresses and Identifiers
~Network aspects in GSM
~Handover
~Mobility Management
~GSM Frequency Allocation
~Authentication and Security In GSM
This document provides an introduction to GSM networks and their history. It discusses [1] the origins and evolution of cellular networks prior to GSM, [2] the formation of GSM in 1982 to develop a pan-European cellular standard, and [3] the key phases and advances of GSM technology over time, including digital voice services, SMS, and mobile data. The document also outlines some of the main advantages of GSM networks, including international roaming, security, voice quality, and their use of a single global standard.
GSM is a 2G mobile communication system that provides voice and data services. It uses TDMA and FDMA to allow multiple users to access the network simultaneously. The key components of a GSM network are the radio subsystem including the BTS, BSC and MS; the network and switching subsystem including the MSC, HLR, VLR; and the operation subsystem including the OMC, AuC and EIR. GSM provides services like telephony, SMS, and data transmission using bearer channels while ensuring security, anonymity and authentication of users.
The document discusses GSM (Global System for Mobile Communication), including its definition as a 2G cellular standard, system architecture with components like the mobile station, base station subsystem, and network subsystem, basic features like call waiting and advanced features like roaming, future developments like UMTS, and advantages like international roaming capabilities and efficient use of spectrum.
This document provides an overview of digital switching systems and digital transmission systems. It discusses how telecommunication networks have transitioned from analog to digital technologies. Key topics covered include digital switching systems, components of transmission networks like digital distribution frames, synchronous digital hierarchy for digital transmission, and fiber-to-the-home (FTTH) technologies using dense wavelength division multiplexing (DWDM) to transmit multiple signals over fiber. The document is intended as an educational reference on modern digital telecommunication systems and technologies.
This document provides an overview of the GSM architecture, which includes the mobile station, base station subsystem, and network switching subsystem. The mobile station contains the mobile equipment and subscriber identity module. The base station subsystem consists of the base transceiver station and base station controller. The network switching subsystem contains the mobile switching center, home location register, visitor location register, authentication center, and equipment identity register. The interfaces between these subsystems enable communication and functionality across the different elements of the GSM network.
The GSM network architecture consists of three major subsystems: the network and switching subsystem (NSS), the base station subsystem (BSS), and the operation and support subsystem (OSS). The BSS is composed of the base transceiver station (BTS), base station controller (BSC), and transcoder (TCU/TRAU). The BTS handles radio transmission/reception, the BSC manages radio resources and handles radio call processing, and the TCU converts between GSM and PSTN/ISDN formats. The NSS contains the mobile switching center (MSC), home location register (HLR), visitor location register (VLR), and equipment identity register (EIR), which manage subscriber
Global System for Mobile Communications (GSM) is a digital cellular network developed to provide digital wireless voice and data services. It was designed to be a digital (wide area) wireless network driven by European Telecom manufacturers, operators, and standardization committees. GSM uses a combination of time division multiple access and frequency division multiple access and has become widely used around the world.
The GSM radio interface uses FDMA to divide the frequency band into channels and TDMA to divide each frequency channel into time slots to allow multiple users, with each user assigned a single time slot. The normal GSM burst carries digitized voice data or other information in a 57-bit data field, and includes guard periods and training sequences to help with timing synchronization and equalization between the mobile station and base transceiver station. GSM networks operate at different frequencies around the world, with GSM-900 being most common in Europe and other parts of the world.
GSM(Global system for mobile communication ) is a second generation cellular standard developed to cater voice services and data delivery using digital modulation.
GSM - (CHARACTERISITCS, FEATURES & ADVANTAGES AND DISADVANTAGES)kalpanait16
This document discusses the characteristics, features, advantages, and disadvantages of GSM. The key characteristics of GSM include it being a fully digital system, providing security against fraud and enhanced privacy, full international roaming capability, support for new services, and support of short message service. The advantages are better quality of speech, support for data transmission and new digital services, international roaming ability, and a large market. However, some disadvantages include dropped and missed calls, less efficiency in dense areas, and potential security issues.
Topics covered in this presentation:
What is a Base Transceiver Station ?
Components of any BTS
BTS transceiver, BTS O&M module, clock module
BTS Transmitter and Receiver Characteristics
BTS configurations
BTS functions and Protocols on Um and Abis Interface
BTS security aspects
Lectures on 2 g,3g,3.5g,4g By Professor Dr Arshad Abbas KhanProfArshadAbbas
This document provides a summary of lectures on cellular networks given at the Department of Electrical Engineering at University of Qatar. It discusses the basics of cellular networks including frequency bands used, multiple access techniques like FDMA, TDMA, and CDMA. It describes the evolution of cellular technologies from 1G to 4G including GSM, 3G UMTS, HSPA 3.5G, and LTE 4G. Key aspects of these technologies like their network architecture, protocols, and frequency spectrums are summarized. The document concludes with a case study on the impact of user mobility on bandwidth sharing in HSPA networks for mobile users on public transportation.
1. Cellular networks use multiple base stations that transmit and receive from mobile devices using assigned frequencies to allow frequency reuse and increase both coverage and capacity.
2. Multiple access schemes like FDMA, TDMA, and CDMA allow multiple users to access the network simultaneously by dividing the available bandwidth.
3. Generations of cellular networks have increased capabilities with 2G supporting digital signals and data, 3G allowing faster data rates including video calls, and 4G providing high-speed multimedia access.
GSM is a second generation cellular technology developed to provide digital voice and data services using TDMA and FDMA. It initially provided circuit switched services but later added packet switched capabilities with GPRS. The key components of GSM are the mobile station, base station subsystem including base transceiver stations and base station controllers, and the network switching subsystem centered around mobile switching centers and databases like HLR, VLR, EIR and AUC. GSM supports various voice and data services as well as supplementary services and saw continual upgrades over time to improve data capabilities.
This presentation covers:
How evolution has happened from First Generation Mobile Communication Systems to present day 3G/UMTS/WCMDA systems
Brief introduction of each Generation: GSM - 2G, 2.5 G - GPRS, 2.75G - EDGE, 3G and then LTE/4G
GSM is a 2G mobile communication system that provides voice and data services using radio frequency bands between 800-2000MHz. It has a three-part architecture including the radio subsystem with mobile stations, base stations and controllers; the network and switching subsystem with mobile switching centers and registers; and the operation subsystem for network management. Key protocols used in GSM include LAPDm for signaling, mobility management for registration and location updating, and call management for call establishment and control. GSM provides location tracking as users roam between different visitor location registers.
GSM is a digital cellular network standard that allows for compatibility between networks and devices. It divides geographic coverage areas into cells served by base stations. GSM uses paired frequencies between 890-960 MHz for uplinks and 935-960 MHz for downlinks, separated by 45 MHz. The network components include the mobile station containing the mobile equipment and SIM card, base station subsystem including base transceiver stations and base station controllers, switching centers, databases, and interfaces to other networks.
The document provides an introduction to the Global System for Mobile Communications (GSM). It describes key aspects of GSM including that it uses a digital cellular network, divides service areas into cells with equipment to transmit and receive calls, operates in specific radio frequency ranges, and uses subscriber identities like IMSI and TMSI. It also summarizes important GSM network components like the MSC, BTS, HLR, VLR, EIR and SIM card.
The document provides an introduction to the Global System for Mobile Communications (GSM). It describes key aspects of GSM including that it uses a digital cellular network, divides service areas into cells with equipment to transmit and receive calls, operates in specific radio frequency ranges, and uses subscriber identity modules (SIMs) and mobile equipment (ME). The document also summarizes key GSM network components like the mobile switching center (MSC), home location register (HLR), visitor location register (VLR), and base station subsystem (BSS).
The document provides information on Global System for Mobile (GSM) network. It discusses that GSM is a second generation cellular standard developed to provide voice and data services using digital modulation. It details the history and development of GSM standards. The document describes the various GSM services including teleservices, bearer services, and supplementary services. It explains the GSM system architecture including components like mobile station, base station subsystem, network switching subsystem and their functions. It also covers GSM specifications, call routing process, advantages of GSM over analog systems, and the future of GSM network.
The document provides an introduction to the Global System for Mobile Communications (GSM). It discusses key aspects of GSM including that it uses digital cellular networks divided into regions called cells. Each cell has equipment to transmit and receive calls within its coverage area. GSM networks operate in specific radio frequency ranges and use frequency reuse to increase capacity. The network components work together to provide mobile communication services, identifying and authenticating subscribers as they roam across different cells.
GSM (Global System for Mobile Communications) is a 2G digital cellular network that was developed to provide improved voice services and support data transmission using digital modulation. It operates in the 900MHz or 1800MHz frequency bands. GSM digitizes and compresses data before transmitting it in time slots on a channel along with other user data. The key components of GSM architecture are the mobile station (comprising the mobile equipment and SIM card), base station subsystem (including base transceiver stations and base station controllers), and networking switching subsystem (consisting of elements like the home location register, visitor location register, and authentication center).
Global System for Mobile Communications(1).pdfbutrukerdu
The document provides an overview of the Global System for Mobile Communications (GSM). Key points include:
- GSM is a digital cellular network developed to provide improved voice quality, capacity, and security compared to earlier analog networks.
- The network uses a cell structure where each cell contains radio transmission equipment and is connected to switches that provide access to wired networks.
- Core network components include Mobile Switching Centers (MSCs), Home Location Registers (HLRs), Visitor Location Registers (VLRs), and Authentication Centers (AUCs) that manage subscriber data and authentication.
- Radio access is handled by Base Transceiver Stations (BTSs) and Base Station Controllers (BSCs)
Mobile communication has evolved from 1G to 4G networks over time. 1G networks used analog technologies while newer generations like 2G, 3G and 4G use digital technologies. 2G networks like GSM use TDMA to allow multiple users to access the network simultaneously. The GSM network architecture consists of mobile stations, base station subsystem and network subsystem. The base station subsystem comprises of base transceiver stations and base station controllers. The network subsystem includes switching centers, databases and registers that control connectivity and mobility. GSM ensures security using authentication and encryption algorithms.
GSM (Global System for Mobile Communications) is a digital cellular network developed to provide a common mobile telecommunications system across Europe. It includes specifications for a mobile network including the architecture and functions of the network components. GSM provides both basic voice services as well as advanced features like caller ID, call forwarding, and short messaging. The GSM network architecture includes mobile stations, base station subsystems, and a network subsystem with components like the mobile switching center and home location register. GSM was developed to provide an international roaming capability and has since expanded globally.
Mobile, wireless and pervasive computing technologies have evolved from large computers to smaller portable devices like PDAs and smartphones. This allows computing to be done anywhere and anytime through wireless connectivity standards like WiFi, Bluetooth, and cellular networks. Wearable computers embed technology into everyday items to provide an "anywhere" computing experience. Mobile computing enables personalization, instant access to information, and location-based services through ubiquitous connectivity.
GSM. Global System for Mobile Communication.Student
This document provides an overview of Global System for Mobile Communication (GSM) technology. It discusses the history and evolution of GSM from 1G to future 5G networks. The key components of a GSM network are described, including the mobile equipment, subscriber identity module, base station system consisting of base transceiver stations and base station controllers, mobile switching center, home location register, visitor location register, and authentication center. Applications, advantages like worldwide connectivity, and disadvantages like limited range are highlighted. The presentation concludes with references and an acknowledgment.
Global system for mobile communcation by Maroof and Ummer MaroofMtechECE
GSM was developed in the 1980s to standardize cellular networks in Europe and beyond. It uses a cellular network structure with Base Transceiver Stations that define cells and connect to Base Station Controllers and Mobile Switching Centers in the core network. A mobile device contains a Mobile Equipment unit and Subscriber Identity Module smart card. GSM provides voice calls and supports additional features like text messaging, caller ID, and international roaming across networks. It was a major advancement over previous analog systems and paved the way for 3G and 4G cellular standards.
STATATHON: Unleashing the Power of Statistics in a 48-Hour Knowledge Extravag...sameer shah
"Join us for STATATHON, a dynamic 2-day event dedicated to exploring statistical knowledge and its real-world applications. From theory to practice, participants engage in intensive learning sessions, workshops, and challenges, fostering a deeper understanding of statistical methodologies and their significance in various fields."
Unleashing the Power of Data_ Choosing a Trusted Analytics Platform.pdfEnterprise Wired
In this guide, we'll explore the key considerations and features to look for when choosing a Trusted analytics platform that meets your organization's needs and delivers actionable intelligence you can trust.
Global Situational Awareness of A.I. and where its headedvikram sood
You can see the future first in San Francisco.
Over the past year, the talk of the town has shifted from $10 billion compute clusters to $100 billion clusters to trillion-dollar clusters. Every six months another zero is added to the boardroom plans. Behind the scenes, there’s a fierce scramble to secure every power contract still available for the rest of the decade, every voltage transformer that can possibly be procured. American big business is gearing up to pour trillions of dollars into a long-unseen mobilization of American industrial might. By the end of the decade, American electricity production will have grown tens of percent; from the shale fields of Pennsylvania to the solar farms of Nevada, hundreds of millions of GPUs will hum.
The AGI race has begun. We are building machines that can think and reason. By 2025/26, these machines will outpace college graduates. By the end of the decade, they will be smarter than you or I; we will have superintelligence, in the true sense of the word. Along the way, national security forces not seen in half a century will be un-leashed, and before long, The Project will be on. If we’re lucky, we’ll be in an all-out race with the CCP; if we’re unlucky, an all-out war.
Everyone is now talking about AI, but few have the faintest glimmer of what is about to hit them. Nvidia analysts still think 2024 might be close to the peak. Mainstream pundits are stuck on the wilful blindness of “it’s just predicting the next word”. They see only hype and business-as-usual; at most they entertain another internet-scale technological change.
Before long, the world will wake up. But right now, there are perhaps a few hundred people, most of them in San Francisco and the AI labs, that have situational awareness. Through whatever peculiar forces of fate, I have found myself amongst them. A few years ago, these people were derided as crazy—but they trusted the trendlines, which allowed them to correctly predict the AI advances of the past few years. Whether these people are also right about the next few years remains to be seen. But these are very smart people—the smartest people I have ever met—and they are the ones building this technology. Perhaps they will be an odd footnote in history, or perhaps they will go down in history like Szilard and Oppenheimer and Teller. If they are seeing the future even close to correctly, we are in for a wild ride.
Let me tell you what we see.
06-04-2024 - NYC Tech Week - Discussion on Vector Databases, Unstructured Data and AI
Discussion on Vector Databases, Unstructured Data and AI
https://www.meetup.com/unstructured-data-meetup-new-york/
This meetup is for people working in unstructured data. Speakers will come present about related topics such as vector databases, LLMs, and managing data at scale. The intended audience of this group includes roles like machine learning engineers, data scientists, data engineers, software engineers, and PMs.This meetup was formerly Milvus Meetup, and is sponsored by Zilliz maintainers of Milvus.
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
Enhanced Enterprise Intelligence with your personal AI Data Copilot.pdfGetInData
Recently we have observed the rise of open-source Large Language Models (LLMs) that are community-driven or developed by the AI market leaders, such as Meta (Llama3), Databricks (DBRX) and Snowflake (Arctic). On the other hand, there is a growth in interest in specialized, carefully fine-tuned yet relatively small models that can efficiently assist programmers in day-to-day tasks. Finally, Retrieval-Augmented Generation (RAG) architectures have gained a lot of traction as the preferred approach for LLMs context and prompt augmentation for building conversational SQL data copilots, code copilots and chatbots.
In this presentation, we will show how we built upon these three concepts a robust Data Copilot that can help to democratize access to company data assets and boost performance of everyone working with data platforms.
Why do we need yet another (open-source ) Copilot?
How can we build one?
Architecture and evaluation
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
06-04-2024 - NYC Tech Week - Discussion on Vector Databases, Unstructured Data and AI
Round table discussion of vector databases, unstructured data, ai, big data, real-time, robots and Milvus.
A lively discussion with NJ Gen AI Meetup Lead, Prasad and Procure.FYI's Co-Found
2. Cellular Network Basics
• There are many types of cellular services; before delving into
details, focus on basics (helps navigate the “acronym soup”)
• Cellular network/telephony is a radio-based technology; radio
waves are electromagnetic waves that antennas propagate
• Most signals are in the 850 MHz, 900 MHz, 1800 MHz, and 1900
MHz frequency bands
Cell phones operate in this frequency
range (note the logarithmic scale)
3. Cellular Network
• Base stations transmit to and receive from mobiles at the
assigned spectrum
– Multiple base stations use the same spectrum (spectral reuse)
• The service area of each base station is called a cell
• Each mobile terminal is typically served by the ‘closest’ base
stations
– Handoff when terminals move
4. Cellular Network Generations
• It is useful to think of cellular Network/telephony in
terms of generations:
– 0G: Briefcase-size mobile radio telephones
– 1G: Analog cellular telephony
– 2G: Digital cellular telephony
– 3G: High-speed digital cellular telephony (including video
telephony)
– 4G: IP-based “anytime, anywhere” voice, data, and
multimedia telephony at faster data rates than 3G
(to be deployed in 2012–2015)
6. The Multiple Access Problem
• The base stations need to serve many mobile
terminals at the same time (both downlink
and uplink)
• All mobiles in the cell need to transmit to the
base station
• Interference among different senders and
receivers
• So we need multiple access scheme
8. Frequency Division Multiple Access
• Each mobile is assigned a separate frequency channel for the
duration of the call
• Sufficient guard band is required to prevent adjacent channel
interference
• Usually, mobile terminals will have one downlink frequency band
and one uplink frequency band
• Different cellular network protocols use different frequencies
• Frequency is a precious and scare resource. We are running out of
it
– Cognitive radio
frequency
9. Time Division Multiple Access
• Time is divided into slots and only one mobile terminal transmits
during each slot
– Like during the lecture, only one can talk, but others may take the
floor in turn
• Each user is given a specific slot. No competition in cellular network
– Unlike Carrier Sensing Multiple Access (CSMA) in WiFi
Guard time – signal transmitted by mobile
terminals at different locations do no arrive
at the base station at the same time
10. Code Division Multiple Access
• Use of orthogonal codes to separate different transmissions
• Each symbol of bit is transmitted as a larger number of bits
using the user specific code – Spreading
– Bandwidth occupied by the signal is much larger than the information
transmission rate
– But all users use the same frequency band together
Orthogonal among users
12. GSM
• Abbreviation for Global System for Mobile
Communications
• Concurrent development in USA and Europe
in the 1980’s
• The European system was called GSM and
deployed in the early 1990’s
13. GSM Services
• Voice, 3.1 kHz
• Short Message Service (SMS)
– 1985 GSM standard that allows messages of at most 160 chars. (incl.
spaces) to be sent between handsets and other stations
– Over 2.4 billion people use it; multi-billion $ industry
• General Packet Radio Service (GPRS)
– GSM upgrade that provides IP-based packet data transmission up to
114 kbps
– Users can “simultaneously” make calls and send data
– GPRS provides “always on” Internet access and the Multimedia
Messaging Service (MMS) whereby users can send rich text, audio,
video messages to each other
– Performance degrades as number of users increase
– GPRS is an example of 2.5G telephony – 2G service similar to 3G
14. GSM Channels
• Physical Channel: Each timeslot on a carrier is referred to as a
physical channel
• Logical Channel: Variety of information is transmitted
between the MS and BTS. Different types of logical channels:
– Traffic channel
– Control Channel
Downlink
Uplink
Channels
15. GSM Frequencies
• Originally designed on 900MHz range, now also
available on 800MHz, 1800MHz and 1900 MHz
ranges.
• Separate Uplink and Downlink frequencies
– One example channel on the 1800 MHz frequency band,
where RF carriers are space every 200 MHz
1710 MHz 1880 MHz1805 MHz1785 MHz
UPLINK FREQUENCIES DOWNLINK FREQUENCIES
UPLINK AND DOWNLINK FREQUENCY SEPARATED BY 95MHZ
17. Mobile Station (MS)
• MS is the user’s handset and has two parts
• Mobile Equipment
– Radio equipment
– User interface
– Processing capability and memory required for
various tasks
• Call signalling
• Encryption
• SMS
– Equipment IMEI number
• Subscriber Identity Module
18. Subscriber Identity Module
• A small smart card
• Encryption codes needed to identify the subscriber
• Subscriber IMSI number
• Subscriber’s own information (telephone directory)
• Third party applications (banking etc.)
• Can also be used in other systems besides GSM, e.g., some
WLAN access points accept SIM based user authentication
19. Base Station Subsystem
• Transcoding Rate and Adaptation Unit (TRAU)
– Performs coding between the 64kbps PCM coding used in the
backbone network and the 13 kbps coding used for the Mobile
Station (MS)
• Base Station Controller (BSC)
– Controls the channel (time slot) allocation implemented by the
BTSes
– Manages the handovers within BSS area
– Knows which mobile stations are within the cell and informs the
MSC/VLR about this
• Base Transceiver System (BTS)
– Controls several transmitters
– Each transmitter has 8 time slots, some used for signaling, on a
specific frequency
20. Network and Switching Subsystem
• The backbone of a GSM network is a telephone network with
additional cellular network capabilities
• Mobile Switching Center (MSC)
– An typical telephony exchange (ISDN exchange) which supports
mobile communications
– Visitor Location Register (VLR)
• A database, part of the MSC
• Contains the location of the active Mobile Stations
• Gateway Mobile Switching Center (GMSC)
– Links the system to PSTN and other operators
• Home Location Register (HLR)
– Contain subscriber information, including authentication information
in Authentication Center (AuC)
• Equipment Identity Register (EIR)
– International Mobile Station Equipment Identity (IMEI) codes for e.g.,
blacklisting stolen phones
21. Home Location Register
• One database per operator
• Contains all the permanent subscriber information
– MSISDN (Mobile Subscriber ISDN number) is the telephone
number of the subscriber
– International Mobile Subscriber Identity (IMSI) is a 15 digit code
used to identify the subscriber
• It incorporates a country code and operator code
– IMSI code is used to link the MSISDN number to the subscriber’s
SIM (Subscriber Identity Module)
– Charging information
– Services available to the customer
• Also the subscriber’s present Location Area Code, which
refers to the MSC, which can connect to the MS.
22. Other Systems
• Operations Support System
– The management network for the whole GSM network
– Usually vendor dependent
– Very loosely specified in the GSM standards
• Value added services
– Voice mail
– Call forwarding
– Group calls
• Short Message Service Center
– Stores and forwards the SMS messages
– Like an E-mail server
– Required to operate the SMS services
23. Location Updates
• The cells overlap and usually a mobile station
can ‘see’ several transceivers (BTSes)
• The MS monitors the identifier for the BSC
controlling the cells
• When the mobile station reaches a new BSC’s
area, it requests an location update
• The update is forwarded to the MSC, entered
into the VLR, the old BSC is notified and an
acknowledgement is passed back
24. Handoff (Handover)
• When a call is in process, the changes in location
need special processing
• Within a BSS, the BSC, which knows the current
radio link configuration (including feedbacks from
the MS), prepares an available channel in the
new BTS
• The MS is told to switch over to the new BTS
• This is called a hard handoff
– In a soft handoff, the MS is connected to two BTSes
simultaneously
25. Roaming
• When a MS enters another operators network, it
can be allowed to use the services of this
operator
– Operator to operator agreements and contracts
– Higher billing
• The MS is identified by the information in the SIM
card and the identification request is forwarded
to the home operator
– The home HLR is updated to reflect the MS’s current
location
29. Service Roadmap
Improved performance, decreasing cost of delivery
Typical
average bit
rates
(peak rates
higher)
WEB browsing
Corporate data access
Streaming audio/video
Voice & SMS Presence/location
xHTML browsing
Application downloading
E-mail
MMS picture / video
Multitasking
3G-specific services take
advantage of higher bandwidth
and/or real-time QoS
3G-specific services take
advantage of higher bandwidth
and/or real-time QoS
A number of mobile
services are bearer
independent in nature
A number of mobile
services are bearer
independent in nature
HSDPA
1-10
Mbps
WCDMA
2
Mbps
EGPRS
473
kbps
GPRS
171
kbps
GSM
9.6
kbps
Push-to-talk
Broadband
in wide area
Video sharing
Video telephony
Real-time IP
multimedia and games
Multicasting
CDMA
2000-
EVDO
CDMA
2000-
EVDV
CDMA
20001x
30. GSM Evolution to 3G
GSM
9.6kbps (one timeslot)
GSM Data
Also called CSD
GSM
General Packet Radio Services
Data rates up to ~ 115 kbps
Max: 8 timeslots used as any one time
Packet switched; resources not tied up all the time
Contention based. Efficient, but variable delays
GSM / GPRS core network re-used by WCDMA (3G)
GPRS
HSCSD
High Speed Circuit Switched Data
Dedicate up to 4 timeslots for data connection ~ 50 kbps
Good for real-time applications c.w. GPRS
Inefficient -> ties up resources, even when nothing sent
Not as popular as GPRS (many skipping HSCSD)
EDGE
Enhanced Data Rates for Global
Evolution
Uses 8PSK modulation
3x improvement in data rate on short distances
Can fall back to GMSK for greater distances
Combine with GPRS (EGPRS) ~ 384 kbps
Can also be combined with HSCSD
WCDMA
31. UMTS
• Universal Mobile Telecommunications System
(UMTS)
• UMTS is an upgrade from GSM via GPRS or EDGE
• The standardization work for UMTS is carried out
by Third Generation Partnership Project (3GPP)
• Data rates of UMTS are:
– 144 kbps for rural
– 384 kbps for urban outdoor
– 2048 kbps for indoor and low range outdoor
• Virtual Home Environment (VHE)
32. UMTS Frequency Spectrum
• UMTS Band
– 1900-2025 MHz and 2110-2200 MHz for 3G transmission
– In the US, 1710–1755 MHz and 2110–2155 MHz will be
used instead, as the 1900 MHz band was already used.
33. UMTS Architecture
Mobile Station
MSC/
VLR
Base Station
Subsystem
GMSC
Network Subsystem
AUCEIR HLR
Other Networks
Note: Interfaces have been omitted for clarity purposes.
GGSN
SGSN
BTS
BSC
Node
B
RNC
RNS
UTRAN
SIM
ME
USIM
ME
+
PSTN
PLMN
Internet
34. UMTS Network Architecture
• UMTS network architecture consists of three
domains
– Core Network (CN): Provide switching, routing and
transit for user traffic
– UMTS Terrestrial Radio Access Network (UTRAN):
Provides the air interface access method for user
equipment.
– User Equipment (UE): Terminals work as air interface
counterpart for base stations. The various identities
are: IMSI, TMSI, P-TMSI, TLLI, MSISDN, IMEI, IMEISV
35. UTRAN
• Wide band CDMA technology is selected for UTRAN air
interface
– WCDMA
– TD-SCDMA
• Base stations are referred to as Node-B and control
equipment for Node-B is called as Radio Network
Controller (RNC).
– Functions of Node-B are
• Air Interface Tx/Rx
• Modulation/Demodulation
– Functions of RNC are:
• Radio Resource Control
• Channel Allocation
• Power Control Settings
• Handover Control
• Ciphering
• Segmentation and reassembly
36. 3.5G (HSPA)
High Speed Packet Access (HSPA) is an amalgamation of two
mobile telephony protocols, High Speed Downlink Packet Access
(HSDPA) and High Speed Uplink Packet Access (HSUPA), that
extends and improves the performance of existing WCDMA
protocols
3.5G introduces many new features that will enhance the UMTS
technology in future. 1xEV-DV already supports most of the
features that will be provided in 3.5G. These include:
- Adaptive Modulation and Coding
- Fast Scheduling
- Backward compatibility with 3G
- Enhanced Air Interface
37. 4G (LTE)
• LTE stands for Long Term Evolution
• Next Generation mobile broadband
technology
• Promises data transfer rates of 100 Mbps
• Based on UMTS 3G technology
• Optimized for All-IP traffic
40. Major LTE Radio Technogies
• Uses Orthogonal Frequency Division
Multiplexing (OFDM) for downlink
• Uses Single Carrier Frequency Division
Multiple Access (SC-FDMA) for uplink
• Uses Multi-input Multi-output(MIMO) for
enhanced throughput
• Reduced power consumption
• Higher RF power amplifier efficiency (less
battery power used by handsets)
42. LTE vs UMTS
• Functional changes compared to the current
UMTS architecture
43. Case Study
Mobility:
A Double-Edged Sword
for HSPA Networks
Fung Po Tso, City University of Hong Kong
Jin Teng, Ohio State University
Weijia Jia, City University of Hong Kong
Dong Xuan, Ohio State University
ACM Mobihoc’10
48. Context
48MobiHoc '10
Can HSPA provide
the same level of
service to mobile
users on public
transport?
pictures’ source: Wikipedia
HSPA Node B
HSPA Node B
49. Outline
• Measurement Methodology
• General Impact of Mobility
• Mobility Impact on Bandwidth Sharing
• Mobility Impact in Transitional Region
• Conclusion
MobiHoc '10 49
52. Measurement Setup
• Two Servers:
– Lab & Data Center
• Three types of
evaluations:
– download only;
upload only;
simultaneous
download & upload.
52MobiHoc '10
53. General Impact of Mobility
• A large spread of HSDPA bit rates and signal
quality
53MobiHoc '10
54. Context
54MobiHoc '10
Common View: Mobility is irrelevant, if not detrimental,
to the fairness in HSPA bandwidth sharing among users
Observation: The bandwidth sharing practice in
stationary HSPA environments is unfair. In
contrast, mobility surprisingly improves fairness
of bandwidth sharing (fairer).
55. Bandwidth Sharing among Users
• Mobility actually improves the fairness of
bandwidth sharing among users
55MobiHoc '10
56. Bandwidth Sharing among Users
• UE can hardly keep its dominancy under rapid
change of radio environment.
– Mobile nodes may see better signal quality at new
locations
• Cell to cell based scheduling algorithm
prevent unfairness from propagating
56MobiHoc '10
57. Context
57MobiHoc '10
Common View: Mobility affects all flows equally. And
TCP flows suffer more than UDP ones
Observation: TCP flows unexpectedly see much
better performance during mobility than UDP
flows.
58. Bandwidth Sharing among Traffic Flows
• TCP flows see better performance during
mobility
58MobiHoc '10
59. Bandwidth Sharing among Traffic Flows
• TCP traffic is much constrained and adaptive
to the channel condition, while UDP traffic
keeps pumping almost the same amount of
data regardless of the channel condition
59MobiHoc '10
60. Context
60MobiHoc '10
Common View: Handoffs are triggered in the
transitional region between cells and always result in a
better wireless connection
Observation: Nearly 30% of all handoffs, selection
of a base station with poorer signal quality can be
witnessed
61. Mobility Impact in Transitional Regions
• throughput often
drops sharply, and
sometimes, as high
as 90% during
handoff period.
61MobiHoc '10
62. Mobility Impact in Transitional Regions
• Ec/Io of the new
base stations are
statistically better
than the original
base stations by
10dBm.
• But almost 30% of
all the handoffs do
not end up with a
better base stations
62MobiHoc '10
63. Conclusion
• Mobility is a double edged sword
– Degrades HSPA services, e.g. throughput
– Improves fairness in bandwidth allocation among
users and traffic flows
• Communication characteristics in HSPA
transitional regions are very complicated
MobiHoc '10 63
64. Acknowledgement
• Part of the slides are adapted from the slides
of Posco Tso, Harish Vishwanath, Erran Li and
Justino Lorenco, Saro Velrajan and TCL India