Glossary of Acronyms
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02-03 Korthet
2 ERICSSON IN BRIEF 1999 - : In November, itu established wcdma as the standard for g mobile systems under the name imt Direct Spread. The decision was welcomed by Erics- son, which can now offer its operator customers all three major versions of this standard. : In terms of number of employees, the takeover of Qualcomm’s infrastructure division was Ericsson’s largest acquisition during , provid- ing Ericsson with a complete product portfolio of second- and third-generation mobile systems. It also accelerated the pace of work in the standardiza- tion area, which was appreciated by the industry as a whole, particularly by the operators. : Ericsson acquired the American companies Torrent and TouchWave and the Danish company Telebit a/s to further strengthen its position in the market for ip and datacom solutions. : In December, Ericsson and Microsoft announced that they would cooperate in the devel- opment and marketing of total solutions for wire- less Internet access. The parties will establish a ERICSSON’S MISSION is jointly owned company to market and supply to understand its mobile e-mail solutions. Ericsson will be the customers’ opportunities majority owner in the new company. and needs, and to provide : During , Ericsson achieved major communication solutions successes with engine, a solution for migrating better than any circuit-switched fixed telecommunications net- competitor. works to a next-generation network that can handle circuit-switched and ip-based, packet-linked traf- IN DOING SO, Ericsson fic. bt in the U.K., kpn in the Netherlands, Telia shall generate a in Denmark and Telefónica in Spain chose engine competitive economic during the year. -
Teaching Protocol Exchanges Over Cellular Air Interface Olufemi Oyedapo, Xavier Lagrange, Philippe Martins, B Van Wyk
Teaching protocol exchanges over cellular air interface Olufemi Oyedapo, Xavier Lagrange, Philippe Martins, B van Wyk To cite this version: Olufemi Oyedapo, Xavier Lagrange, Philippe Martins, B van Wyk. Teaching protocol exchanges over cellular air interface. AFRICON 2007 : 8th IEEE africon conference, Sep 2007, Windhoek, Namibia. pp.1 - 7, 10.1109/AFRCON.2007.4401606. hal-02165725 HAL Id: hal-02165725 https://hal.archives-ouvertes.fr/hal-02165725 Submitted on 26 Jun 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. 1 Teaching Protocol Exchanges over Cellular Air Interfaces O. J. Oyedapo, X. Lagrange, P. Martins, and B. Van Wyk attempts were made to examine and study the behavior of MS Abstract—The evolutionary path taken by cellular standards (using trace MS) by analyzing the Dm-channels to suitably to the current and future standards is incomplete without fully support transport of information between the MS and the understanding the older standards. The comprehension of the network. This study culminated from an attempt to have better GSM standard, specifically the procedures for protocols understanding of the services and supplementary services in exchange over the air interface will help students understand radio resource allocation procedures in GPRS and UMTS, and integrated services digital network (ISDN). -
Network Experience Evolution to 5G
Network Experience Evolution to 5G Table of Contents Executive Summary ........................................................................................................... 4 Introduction ........................................................................................................................ 5 Definition of Terms ............................................................................................................... 5 Typical MBB Services and Network Experience Requirements in the 5G Era ............. 7 VR ........................................................................................................................................ 8 Video.................................................................................................................................... 9 Voice .................................................................................................................................... 9 Mobile Gaming ................................................................................................................... 10 FWA ................................................................................................................................... 11 Summary ........................................................................................................................... 13 Network Evolution Trends .............................................................................................. 13 5G-oriented LTE Experience Improvement Technologies .......................................... -
CDMA2000—A World View
CDMA2000—A world view Johan Langer and Gwenn Larsson The world’s first CDMA2000 networks were launched in Korea in October while maintaining the 1.25 MHz band- 2000, providing 144 kbit/s data rates to subscribing customers and deliv- width. Operators and manufactures soon re- ering nearly twice the voice capacity that operators experienced with their alized that there were inherent cost, back- cdmaOne (IS-95) systems. The success of the CDMA2000 1X system in ward compatibility and timing advantages Korea has encouraged many operators in the Americas and Asia to follow in keeping with the 1.25 MHz bandwidth for evolution. Thus, CDMA2000 3X has through with their plans to launch CDMA2000 this year. now been put on the wayside until market The authors outline some of the products and describe product advan- demands make it necessary to migrate to a tages that Ericsson CDMA customers will gain when rolling out Ericsson’s widerband carrier (3.75 MHz). CMS 11 R3 to provide third-generation services early next year. The authors also describe some of the key enablers in CMS 11 R3. 1xEV-DO The two phases of 1xEV are labeled 1xEV-DO and 1xEV-DV. DO stands for data only; DV stands for data and voice. Updates in the evolution CDMA2000 1xEV-DO was standardized by the Telecommunications Industry Associa- of CDMA2000 tion (TIA) in October 2000. 1xEV-DO was Since the spring of 2000, the evolution of recently recognized by the ITU-R WP8F as third-generation CDMA systems has an IMT-2000 standard. Formal approval is changed dramatically. -
UMTS Overview
UMTS overview David Tipper Associate Professor Graduate Telecommunications and Networking Program University of Pittsburgh 2720 Slides 12 UMTS • ETSI proposed GSM/NA-TDMA /GPRS evolution under name Universal Mobile Telecom. Services (UMTS) • Most of 3G licenses in Europe required operator to deploy a UMTS system covering x% of population by a specific date y – Germany: 25% of population by 12/03, 50% by 12/05 –Norway: 80% of population by 12/04 – In most countries operators have asked for and received deployment delay due to dot.com bust and equipment delays • Estimate 2.5 Billion euros to deploy a 5000 base station UMTS system • According to UMTS Forum – More than 90 million UMTS users as of 10/06 on operating networks in more than 50 countries – Most deployments of UMTS in Europe (~40% of market) and Pacific Rim (~38% market) Telcom 2720 2 UMTS • UMTS is a complete system architecture – As in GSM emphasis on standardized interfaces • mix and match equipment from various vendors – Simple evolution from GPRS – allows one to reuse/upgrade some of the GPRS backhaul equipment – Backward compatible handsets and signaling to support intermode and intersystem handoffs • Intermode; TDD to FDD, FDD to TDD • Intersystem: UMTS to GSM or UMTS to GPRS – UMTS supports a variety of user data rates and both packet and circuit switched services – System composed of three main subsystems Telcom 2720 3 UMTS System Architecture Node B MSC/VLR GMSC PSTN RNC USIM Node B HLR ME Internet Node B RNC SGSN GGSN Node B UE UTRAN CN External Networks • UE (User Equipment) that interfaces with the user • UTRAN (UMTS Terrestrial Radio Access Network) handles all radio related functionality – WCDMA is radio interface standard here. -
Introduction to Mobile Wimax Radio Access Technology: PHY and MAC Architecture
Introduction to mobile WiMAX Radio Access Technology: PHY and MAC Architecture Dr. Sassan Ahmadi Wireless Standards and Technology Intel Corporation December 7, 2006 Outline y What is mobile WiMAX? y Salient features of mobile WiMAX y IEEE 802.16 Reference Model y Air-Interface Protocol Stack y WiMAX Network Reference Model y Review of mobile WiMAX Physical Layer y Review of mobile WiMAX MAC Layer y Performance of mobile WiMAX y Next Generation of mobile WiMAX y Back up – mobile WiMAX system profile feature set 2 Sassan Ahmadi/UCSB Presentation/December 2006 What is mobile WiMAX? y Mobile WiMAX is a rapidly growing broadband wireless access technology based on IEEE 802.16-2004 and IEEE 802.16e-2005 air-interface standards. y The WiMAX Forum* is developing mobile WiMAX system profiles that define the mandatory and optional features of the IEEE standard that are necessary to build a mobile WiMAX compliant air interface which can be certified by the WiMAX Forum. y mobile WiMAX is not the same as IEEE 802.16e-2005, rather a subset of the IEEE STD 802.16 standard features and functionalities. * http://www.wimaxforum.org 3 Sassan Ahmadi/UCSB Presentation/December 2006 Salient Features of mobile WiMAX y The mobile WiMAX air interface utilizes Orthogonal Frequency Division Multiple Access (OFDMA) as the radio access method for improved multipath performance in non-line-of-sight environments. y High Data Rates: The use of multiple-input multiple-output (MIMO) antenna techniques along with flexible sub-channelization schemes, adaptive modulation and coding enable the mobile WiMAX technology to support peak downlink (DL) data rates up to 128 Mbps per sector and peak uplink (UL) data rates up to 56 Mbps per sector in 20 MHz bandwidth (DL 2x2 MIMO, UL 1x2 Virtual MIMO). -
End-Of-Life Treatment of Radio Base Station Transceivers in Europe, Japan and the USA – a Life Cycle Assessment Study
End-of-Life treatment of Radio Base Station transceivers in Europe, Japan and the USA – a Life Cycle Assessment study Anna Grunewald Jessica Gustavsson Stockholm 991210 TRITA-KTH-IM 1999:22 Lith-IKP-ING-EX--99/19--SE Preface This study was initiated by Ericsson Radio Systems AB and carried out as a co-operation between Ericsson Radio Systems AB, Linköping Institute of Technology and the Royal Institute of Technology in Stockholm during the summer and autumn of 1999. First of all, we would like to thank our supervisors during the project, Susanne Lundberg at Ericsson Radio Systems AB, Jörgen Furuhjelm at Linköping Institute of Technology and Lennart Nilson at the Royal Institute of Technology for valuable help and guidance throughout the project. We would also like to express our gratitude to Jens Malmodin, Richard Trankell and Elaine Weidman at Ericsson Radio Systems AB and to Fjalar Kommonen at FFK Ltd for all their help. One of the most difficult tasks in this study was to develop probable logistic scenarios for the take-back of discarded transceivers. We would like to take this opportunity to thank amongst others Rickard Slettmyr and Mattias Sundstedt at Ericsson Radio Systems AB and Mikael Hietarinta at Nippon Ericsson for taking time to help us with this. Finally, we would like to thank our contact persons at the involved recycling companies, who have provided valuable information to the study; Kazuo Suzuki at Total Environmental Recycling Management, Mike Ogle and Darrel Stoecklin at United Recycling Industries Inc., Johan Zwart at MIREC B.V., Lennart Edvinsson at Ragn-Sells Elektronikåtervinning AB, Anders Axelsson and Sune Nordström at AB Arv Andersson, Sören Brännström and Theo Lehner at Boliden AB, Lars Cronquist at Gotthard Aluminium AB and Christer Forsgren at SAKAB. -
Multiple Access Techniques for 4G Mobile Wireless Networks Dr Rupesh Singh, Associate Professor & HOD ECE, HMRITM, New Delhi
International Journal of Engineering Research and Development e-ISSN: 2278-067X, p-ISSN: 2278-800X, www.ijerd.com Volume 5, Issue 11 (February 2013), PP. 86-94 Multiple Access Techniques For 4G Mobile Wireless Networks Dr Rupesh Singh, Associate Professor & HOD ECE, HMRITM, New Delhi Abstract:- A number of new technologies are being integrated by the telecommunications industry as it prepares for the next generation mobile services. One of the key changes incorporated in the multiple channel access techniques is the choice of Orthogonal Frequency Division Multiple Access (OFDMA) for the air interface. This paper presents a survey of various multiple channel access schemes for 4G networks and explains the importance of these schemes for the improvement of spectral efficiencies of digital radio links. The paper also discusses about the use of Multiple Input/Multiple Output (MIMO) techniques to improve signal reception and to combat the effects of multipath fading. A comparative performance analysis of different multiple access schemes such as Time Division Multiple Access (TDMA), FDMA, Code Division Multiple Access (CDMA) & Orthogonal Frequency Division Multiple Access (OFDMA) is made vis-à-vis design parameters to highlight the advantages and limitations of these schemes. Finally simulation results of implementing some access schemes in MATLAB are provided. I. INTRODUCTION 4G (also known as Beyond 3G), an abbreviation of Fourth-Generation, is used for describing the next complete evolution in wireless communications. A 4G system will be a complete replacement for current networks and will be able to provide a comprehensive and secure IP solution. Here, voice, data, and streamed multimedia can be given to users on an "Anytime, Anywhere" basis, and at much higher data rates than the previous generations [1], [2], [3]. -
Cellular Technology.Pdf
Cellular Technologies Mobile Device Investigations Program Technical Operations Division - DFB DHS - FLETC Basic Network Design Frequency Reuse and Planning 1. Cellular Technology enables mobile communication because they use of a complex two-way radio system between the mobile unit and the wireless network. 2. It uses radio frequencies (radio channels) over and over again throughout a market with minimal interference, to serve a large number of simultaneous conversations. 3. This concept is the central tenet to cellular design and is called frequency reuse. Basic Network Design Frequency Reuse and Planning 1. Repeatedly reusing radio frequencies over a geographical area. 2. Most frequency reuse plans are produced in groups of seven cells. Basic Network Design Note: Common frequencies are never contiguous 7 7 The U.S. Border Patrol uses a similar scheme with Mobile Radio Frequencies along the Southern border. By alternating frequencies between sectors, all USBP offices can communicate on just two frequencies Basic Network Design Frequency Reuse and Planning 1. There are numerous seven cell frequency reuse groups in each cellular carriers Metropolitan Statistical Area (MSA) or Rural Service Areas (RSA). 2. Higher traffic cells will receive more radio channels according to customer usage or subscriber density. Basic Network Design Frequency Reuse and Planning A frequency reuse plan is defined as how radio frequency (RF) engineers subdivide and assign the FCC allocated radio spectrum throughout the carriers market. Basic Network Design How Frequency Reuse Systems Work In concept frequency reuse maximizes coverage area and simultaneous conversation handling Cellular communication is made possible by the transmission of RF. This is achieved by the use of a powerful antenna broadcasting the signals. -
LTE Air Interface Operation
Innovating Telecoms Training Instructor’s knowledge was excellent. Great real-world experience. Watch our course intro video. LTE Air Interface Operation Course Description With the introduction of LTE came the development of a new radio technology based on OFDMA / SC-FDMA. This course focuses on the LTE Air interface and provides a detailed analysis of the structure and features of the physical layer, as well as the layer 2 and 3 protocols, before explaining how these are used in the operation of the radio link from initial attach, through service delivery and mobility. Finally, the concept and operation of LTE-M and NB-IoT are detailed. Prerequisites: LTE System Engineering, or equivalent knowledge. 12 12 Hours Learning CPD Learning Level: 3 (OnlineAnytime) Credits (Advanced) This course will contain the following sections: 1. LTE Air Interface 2. LTE Physical Layer Structure Topic areas covered include: Topic areas covered include: • Frequency Bands. • LTE Frame Structure: - LTE FFT Sizes. • 3GPP Spectrum Bands. - Subcarriers and Reference Signals. • EARFCN. - Combating Interference in the Time Domain. - Cyclic Prefix. • E-UTRA Protocols: - Frame Structure: - Uu Interface: - Ts (Time Unit). - RRC, PDCP, RLC and MAC. - Type 1 Radio Frames, Slots and Subframes. - S1-MME Interface: - Type 2 Radio Frames, Slots and Subframes. - S1AP and SCTP. - S1-U Interface: • Resource Grid and Resource Blocks: - GTP-U. - Downlink PRB Parameters: - X2 Interface: - RB and RE. - X2AP. - Uplink PRB Parameters. • UE and eNB Capabilities: • Downlink Channel for Initial Access: - eNB Capabilities. - Downlink Synchronization Signals (FDD): • Home Evolved Node B. - PSS and SSS. • UE Capabilities. • Downlink Reference Signals: - Cell Specific Reference Signals: • Air Interface Identities: - CRS-RS vs CSI-RS. -
Wimax Solutions Airspan’S Wimax Deployments Around the World
Industry’s most complete WiMAX product family in the widest selection of frequency bands WiMAX Solutions Airspan’s WiMAX Deployments Around the World 1 Airspan - The Recognized Leader in WiMAX • The widest range of WiMAX products • The widest range of frequency bands • The most advanced technologies and features Airspan is a worldwide leader in capability enables them to broadband wireless with over 400 simultaneously oer both WiMAX and customers in more than 100 countries. Wi-Fi, thus enabling the service provider to address a variety of As a founding member of the WiMAX markets including xed, nomadic, Forum™, Airspan has led the way in portable and Mobile WiMAX together WiMAX, being among the rst wave of with any Wi-Fi enabled device. companies to achieve certication for its base station and end user premises The challenges associated with equipment. delivering time critical services such as voice and video over a shared medium Airspan is also leading the race to such as wireless access are well known. Introducing WiMAX Mobile WiMAX. Through a careful Airspan’s VoiceMAX gives operators choice of advance technologies, the the ability to deliver carrier-grade VoIP agship base station HiperMAX is through a software suite that provides software upgradeable to Mobile admission control and manages WiMAX. The recently announced network congestion to deliver the best Over 400 customers in more than MicroMAXe also use the same user experience for VoIP calls across a 100 countries baseband technology rst HiperMAX network operating xed, • Maximize your CAPEX and developed for HiperMAX. nomadic and mobile proles OPEX returns simultaneously. -
Cdma2000-1X EV-DO Wireless Networks: Technology Overview
Technical Brief cdma2000-1x EV-DO Wireless Networks: Technology Overview Cellular networks continue to grow at a rapid pace around the world. In many regions, network operators are bringing cdma2000 1xEV-DO capabilities into commercial service as part of the evolution towards Third-Generation (3G) networks. This technical brief will introduce the reader to cdma2000 1xEV-DO wireless network concepts and will provide understanding and insight into the air interface. In order to assist maintenance personnel in achieving the high data rates promised by EVDO technology, a particular focus will be given to base station forward-link transmissions. We begin with a review of the evolution of cdma2000 1xEV-DO, followed by a description of the forward-link air interface and key RF parameters. We will then discuss some of the testing challenges in cdma2000 1xEV-DO and describe state-of-the-art test tools that can help wireless networks meet quality of service (QoS) goals. cdma2000-1x EV-DO Overview Technical Brief Figure 1. The Evolution of CDMA Technology Evolution of cdma2000 1xEV-DO While cdma2000 1xRTT is capable of data rates of approximately 144 kbps, the higher data rates significantly Code division multiple access (CDMA) is a second-genera- reduce the ability of the CDMA carrier to support voice tion cellular technology that utilizes spread-spectrum traffic channels. As a result, many wireless service providers techniques. CDMA came to market as an alternative to have been reluctant to allow high data rates in 1xRTT and, GSM-based frequency-hopping architectures. Basic CDMA instead, have opted to implement a dedicated carrier using systems deliver approximately 10X the voice capacity of EVDO technology.