Book•
4G: LTE/LTE-Advanced for Mobile Broadband
21 Mar 2011-
TL;DR: In this article, the authors focus on LTE with full updates including LTE-Advanced to provide a complete picture of the LTE system, including the physical layer, access procedures, broadcast, relaying, spectrum and RF characteristics, and system performance.
Abstract: Based on the bestseller "3G Evolution - HSPA and LTE for mobile broadband" and reflecting the ongoing success of LTE throughout the world, this book focuses on LTE with full updates including LTE-Advanced to provide a complete picture of the LTE system. Overview and detailed explanations are given for the latest LTE standards for radio interface architecture, the physical layer, access procedures, broadcast, relaying, spectrum and RF characteristics, and system performance. 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 the LTE/LTE-Advanced implementation are given. An overview of other related systems such as GSM/EDGE, HSPA, CDMA2000, and WIMAX is also provided. This book is a 'must-have' resource for engineers and other professionals in the telecommunications industry, working with cellular or wireless broadband technologies, giving an understanding of how to utilize the new technology in order to stay ahead of the competition. The authors of the book all work at Ericsson Research and have been deeply involved in 3G and 4G 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 LTE within 3GPP. Includes full details of the latest additions to the LTE Radio Access standards and technologies up to and including 3GPP Release 10Clear explanations of the role of the underlying technologies for LTE, including OFDM and MIMO Full coverage of LTE-Advanced, including LTE carrier aggregation, extended multi-antenna transmission, relaying functionality and heterogeneous deploymentsLTE radio interface architecture, physical layer, access procedures, MBMS, RF characteristics and system performance covered in detail
Citations
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TL;DR: The research presented herein explores the development of a standards aligned, multi-stream aware framework; allowing mobile network operators the efficiency gains of broadcast while continuing to offer personalized experiences to subscribers.
Abstract: The era of ubiquitous access to a rich selection of interactive and high quality multimedia has begun; with it, significant challenges in data demand have been placed on mobile network technologies. Content creators and broadcasters alike have embraced the additional capabilities offered by network delivery; diversifying content offerings and providing viewers with far greater choice. Mobile broadcast services introduced as part of the long term evolution standard, that are to be further enhanced with the release of 5G, do aid in spectrally efficient delivery of popular live multimedia to many mobile devices, but, ultimately rely on all users expressing interest in the same single stream. The research presented herein explores the development of a standards aligned, multi-stream aware framework; allowing mobile network operators the efficiency gains of broadcast while continuing to offer personalized experiences to subscribers. An open source, system level simulation platform is extended to support broadcast, characterized, and validated. This is followed by the implementation of a hybrid unicast broadcast synchronization (HUBS) framework able to dynamically vary broadcast resource allocation. The HUBS framework is then further expanded to make use of scalable video content.
14 citations
Cites methods from "4G: LTE/LTE-Advanced for Mobile Bro..."
...For any eNodeB that provides an eMBMS service, certain frames are periodically allocated for the transmission of the Multicast Channel (MCH) [10]....
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...via IP Multicast, efficiently using the backhaul network [10]....
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Journal Article•
TL;DR: This thesis studies the dominant power consumer in future cellular networks, the Long Term Evolution radio base stations, and proposes mechanisms that enhance the BS energy efficiency by reducing its power consumption under target rate constraints.
Abstract: This thesis is concerned with the energy efficiency of cellular networks. It studies the dominant power consumer in future cellular networks, the Long Term Evolution radio base stations (BS), and proposes mechanisms that enhance the BS energy efficiency by reducing its power consumption under target rate constraints. These mechanisms trade spare capacity for power saving.
13 citations
01 Nov 2013
TL;DR: Simulation results show that, the CA technique employing AMC scheme based on the formulated mathematical expression significantly achieve the best possible performance in terms of spectral efficiency in the downlink transmission compared to the performance of Non-CA based on single Component Carrier (CC) employing AMC Scheme.
Abstract: High spectral efficiency is considered as one of the most significant requirements that should be achieved in LTE-Advanced standard in order to fulfil the requirements of IMT-Advanced technology. Carrier Aggregation (CA) and Adaptive Modulation and Coding (AMC) techniques are considered as two potential techniques that can provide high spectral efficiency in wireless communication systems. In this paper, CA technique employing AMC scheme will be implemented to further enhance spectral efficiency performance. Meanwhile, this paper is targeted to simplify a mathematical formulation for calculating spectral efficiency when CA technique is implemented employing AMC scheme. Simulation results show that, the CA technique employing AMC scheme based on the formulated mathematical expression significantly achieve the best possible performance in terms of spectral efficiency in the downlink transmission compared to the performance of Non-CA based on single Component Carrier (CC) employing AMC scheme.
13 citations
Cites background from "4G: LTE/LTE-Advanced for Mobile Bro..."
...The Third Generation Partnership Project (3GPP) develops the new mobile communication standard, which known as Long Term Evolution Advanced (LTE– Advanced) Release 10 &11 (R-10&11) [1]....
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...Based on 3GPP specifications as have been introduced in [1], [11], [17] and [18], one radio frame consists of ten subframes (i....
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...Therefore, the normalized user spectral efficiency c; for user j can be expressed by the following formula [1]....
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...LTE-Advanced standard can provide peak data rate up to 1 Gbps in the Downlink (DL) and 500 Mbps in the UpLink (UL) over a wider system bandwidth up to 100MHz [1], [3] – [6], thereby giving it the potential to meet the increasing demand for users’ mobile broadband access....
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TL;DR: This paper derives the asymptotic expressions of downlink and D2D signal-to-interference-plus-noise ratios (SINRs) for sufficiently large antenna number, and shows that their distributions can be approximated by Gaussian or exponential random variables and distributive learning algorithms are proposed to evaluate the means and variances of these random variables.
Abstract: In this paper, a novel learning-based rate adaptation mechanism is proposed for a downlink massive multiple-input-multiple-output (MIMO) network with underlaid device-to-device (D2D) links, where the link signal-to-interference-plus-noise ratio (SINR) cannot be accurately predicted before transmission, even its distribution statistics are unknown at the very beginning. Specifically, two coexistence schemes are considered: (1) the D2D links only reuse the downlink subframes; and (2) the D2D receivers also join the uplink channel estimation of the associated cells. For the second scheme, the downlink interference to the D2D receivers is suppressed at the cost of channel training overhead. The geographic distributions of the selected downlink and D2D users in each frame are modeled as two independent stochastic processes with unknown statistics. As a result, the distribution of interference power is unknown to the transmitters. In order to facilitate robust rate allocation, we first derive the asymptotic expressions of downlink and D2D signal-to-interference-plus-noise ratios (SINRs) for sufficiently large antenna number, and show that their distributions can be approximated by Gaussian or exponential random variables. Subsequently, distributive learning algorithms are proposed to evaluate the means and variances of these random variables. This enables the BSs and D2D transmitters to determine the transmission rates under a constraint on packet outage probability.
13 citations
Cites background from "4G: LTE/LTE-Advanced for Mobile Bro..."
...Remark 1 (Channel Knowledge Acquisition): The available large-scale fading coefficients in Definition 1 and Definition 2 can be estimated via the periodic broadcasting reference signals of each BS, which is a natural requirement due to potential handover and commonly adopted in cellular systems [22]....
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01 Jul 2017
TL;DR: An IoT enabled approach that can provide emergency communication and location tracking services in a remote car that meets an unfortunate accident or any other emergency situation and is designed with Raspberry Pi 3 Model B and UMTS-HSDPA communication protocol.
Abstract: Internet of Things is an emerging technology having the ability to change the way we live. In IoT vision, each and every 'thing' has the ability of talking to each other that brings the idea of Internet of Everything in reality. Numerous IoT services can make our daily life easier, smarter, and even safer. Using IoT in designing some special services can make a lifesaver system. In this paper, we have presented an IoT enabled approach that can provide emergency communication and location tracking services in a remote car that meets an unfortunate accident or any other emergency situation. Immediately after an accident or an emergency, the system either starts automatically or may be triggered manually. Depending upon type of emergency (police and security, fire and rescue, medical, or civil) it initiates communication and shares critical information e.g. location information, a set of relevant images taken from prefixed angles etc. with appropriate server / authority. Provision of interactive real-time multimedia communication, real-time location tracking etc. have also been integrated to the proposed system to monitor the exact condition in real-time basis. The system prototype has been designed with Raspberry Pi 3 Model B and UMTS-HSDPA communication protocol.
13 citations
Cites methods from "4G: LTE/LTE-Advanced for Mobile Bro..."
...• An USB 4G/LTE [19] Dongle is used to track location of the car and also for communication unit....
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