Showing papers on "LTE Advanced published in 2007"

3G Evolution : HSPA and LTE for Mobile Broadband

Abstract: This very up-to-date and practical book, written by engineers working closely in 3GPP, gives insight into the newest technologies and standards adopted by 3GPP, with detailed explanations of the specific solutions chosen and their implementation in HSPA and LTE. The key technologies presented include multi-carrier transmission, advanced single-carrier transmission, advanced receivers, OFDM, MIMO and adaptive antenna solutions, advanced radio resource management and protocols, and different radio network architectures. Their role and use in the context of mobile broadband access in general is explained. Both a high-level overview and more detailed step-by-step explanations of HSPA and LTE implementation are given. An overview of other related systems such as TD SCDMA, CDMA2000, and WIMAX is also provided.This is a 'must-have' resource for engineers and other professionals working with cellular or wireless broadband technologies who need to know how to utilize the new technology to stay ahead of the competition.The authors of the book all work at Ericsson Research and are deeply involved in 3G development and standardisation since the early days of 3G research. They are leading experts in the field and are today still actively contributing to the standardisation of both HSPA and LTE within 3GPP. * Gives the first explanation of the radio access technologies and key international standards for moving to the next stage of 3G evolution: fully operational mobile broadband* Describes the new technologies selected by the 3GPP to realise High Speed Packet Access (HSPA) and Long Term Evolution (LTE) for mobile broadband * Gives both higher-level overviews and detailed explanations of HSPA and LTE as specified by 3GPP

Physical Layer Performance of Long Term Evolution Cellular Technology

Abstract: Despite commercial 3G networks are starting to be fully operational and high speed data packet access (HSDPA) is on its way to be deployed, operators and manufacturers are already in a race towards 4G technologies. The road to 4G has a mandatory milestone in long term evolution (LTE) as it is a promising technology which will allow backwards compatibility besides a higher performance. Thus operators, manufacturers and research institutes are cooperating in the definition of LTE specifications. This paper presents a performance evaluation of LTE downlink physical layer according to the latest 3GPP specifications. Particularly, the main features at the LTE physical layer (like spatial multiplexing or adaptive modulation and coding) are described and analyzed.

Mobile Terminals toward LTE and Requirements on Device Technologies

Abstract: This paper overviews the universal mobile telecommunications system long term evolution (LTE) and discusses the requirements for device technologies pertaining to mobile terminals. The LTE represents the next generation cellular phone technology that is intended to achieve a high peak data rate, low latency, and high radio efficiency in addition to low cost and sufficiently high mobility characteristics. Vigorous discussion regarding the specifications for LTE is currently ongoing in the 3rd generation partnership project. This paper also introduces various device technologies that support current mobile terminals.

A Techno-Economic Analysis of 3G Long-Term Evolution for Broadband Access

Abstract: 3G long-term evolution (LTE) can bring substantial technological and economical benefits to operators deploying mobile networks beyond 3G. With significant improvements in the radio interface, enabling a lower data access cost per megabyte as well as several potentially important new services, 3G LTE could have a decisive advantage over alternative wireless technologies that currently compete with 3GPP technologies. 3G LTE provides a cost-efficient way to deliver the most popular services to large numbers of people, with a technology that is directly based on existing 2G and 3G systems. This paper analyzes the economics of 3G LTE for a system architecture evolution (SAE) network. This starts with examining the drivers for broadcasting and mobility convergence, which is followed by a description of the business case for the 3G LTE technology and its SAE network structure. Concluding the paper is a techno-economic analysis for a 3G LTE operator with its own 3G network. The analysis is carried out by the construction of a techno-economic simulation model, which looks at a large Western European type country from 2010 to 2019. Two different cases are taken into account: a fixed use case, which is similar to that of wireless DSL, and a mobile use case, which is similar to that of 3G cellular data. The respective addressable markets arc assumed to be one million and ten million users. For these two cases, the total costs of building and operating the SAE network arc approximately 120 million and 1.9 billion euros. For the lived case, an ARPU of 15 euros per month is sufficient for breakeven; for the mobile case, an ARPU of 10 euros.

Channel Quality Information Reporting and Channel Quality Dependent Scheduling in LTE

Abstract: Telecommunication systems are under constant development. Currently 3GPP is working on an evolution of the 3G-standard, under the name 3G Long Term Evolution (LTE). Some of the goals are higher thr ...

Scheduling of Multi-Media over 3GPP LTE

Abstract: As the 3rd Generation Partnership Project is in the process of defining the Long-Term Evolution (LTE) of 3G, there is a high need for evaluations of different approaches in this future cellular ...

Low-complexity OFDM transceiver design for UMTS-LTE

Abstract: Over the past two decades the mobile wireless communication systems has been growing fast and continuously. Therefore, the standardization bodies together with wireless researchers and mobile operators around the globe have been constantly working on new technical specifications in order to meet the demand for this rapid growth. The 3rd Generation Partnership Project (3GPP) one of the largest of such standardization bodies, works on developing the current third generation (3G) mobile telecommunication systems towards the future 4th generation. Research towards meeting the higher demands for higher data rates was the main reason for the birth of an evolution technology towards the 4th generation mobile systems. This evolution to the current 3rd generation UMTS systems was given the name E-UTRA/UTRAN Long Term Evolution (LTE) by the 3GPP. This thesis research has been carried out at the Telecommunications Research Center (ftw.) in Vienna. It was conducted in the framework of the C10 project “Wireless Evolution Beyond 3G”. One of the fields of research within this project is to have a special focus on the OFDM modulation schemes that are discussed under the new evolution technology (LTE) of the UMTS mobile networks. Therefore, this thesis focuses mainly in analyzing the new requirements, and evaluating them by designing a low-complexity UMTS-LTE OFDM based transceiver. This thesis aims mainly in studying the feasibility of this technology by means of simulation.

LTE radio access: An overview

Abstract: This chapter provides an overview of some of the most important components and features of Long-Term Evolution (LTE). These include transmission schemes, scheduling, hybrid ARQ with soft combining, multi-antenna support, and spectrum flexibility. The LTE downlink transmission scheme is based on orthogonal frequency division multiplex (OFDM). Due to the relatively long OFDM symbol time in combination with a cyclic prefix, OFDM provides a high degree of robustness against channel frequency selectivity. Moreover, OFDM with its inherent robustness to frequency-selective fading is attractive for the downlink, especially when combined with spatial multiplexing. At the heart of the LTE transmission scheme is the use of shared-channel transmission. In this transmission, the time-frequency resource is dynamically shared between users. The use of shared-channel transmission is well matched to the rapidly varying resource requirements posed by packet data and also enables several of the other key technologies used by LTE. Finally, one important part of the LTE requirements in terms of spectrum flexibility is the possibility to deploy LTE-based radio access in both paired and unpaired spectrum that is LTE should support both frequency- and time-division-based duplex arrangements.

Progress of 3GPP LTE Standardization

Abstract: 3GPP initiated its Long Term Evolution (LTE) standardization work to retain its technology and standard advantages in the field of mobile communications. Several advanced technologies and novel concepts related to the physical layer (layer 1), air interface protocol structure layer (layer 2) and network architecture are adopted. Solutions to Voice over IP (VoIP) and Multimedia Broadcast/Multicast Service (MBMS) are in the optimization process. 3GPP LTE has fulfilled the high data rate, low latency and an all-packet basis.