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4G: LTE/LTE-Advanced for Mobile Broadband

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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Journal ArticleDOI
Adnan Aijaz1
TL;DR: The main objective of this paper is to investigate the problem of radio resource allocation for haptic communications over 5G networks and to reduce complexity, a two-step solution has been provided after decomposing the original optimization problems.
Abstract: The exchange of haptic information in remote operation systems allows humans to physically interact in remote environments with complete immersion. Such human-in-the-loop networks have been realized through wired solutions in the past. It is expected that the emerging 5G mobile communications networks will be able to meet the stringent requirements of real-time haptic interaction. By enabling haptic communications over 5G networks, human-in-the-loop mobile networks will emerge, that will support unprecedented applications. The main objective of this paper is to investigate the problem of radio resource allocation for haptic communications over 5G networks. The key requirements of haptic communications from a radio resource allocation perspective have been identified. These requirements have been translated into two distinct optimization problems for radio resource allocation, pertaining to perceptual coding and symmetric design cases. To reduce complexity, a two-step solution has been provided after decomposing the original optimization problems. In both cases, low-complexity greedy heuristic algorithms and near-optimal solutions have been proposed for resource allocation. Performance evaluation has been conducted based on a 5G air-interface design.

31 citations


Cites background from "4G: LTE/LTE-Advanced for Mobile Bro..."

  • ...For a detailed description of uplink and downlink schedulers, interested readers are referred to [35]....

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Patent
Erik Eriksson1, Pål Frenger1, Robert Baldemair1, Konstantinos Dimou1, Johan Bergman1 
17 Jan 2013
TL;DR: In this article, the authors propose a dynamic random access resource configuration and selection for a wireless device and a mobile communication network using random access, and more specifically to dynamic Random Access Resource Configuration and Selection.
Abstract: The disclosure relates to connection setup between a wireless device and a mobile communication network using random access, and more specifically to dynamic random access resource configuration and selection. The disclosure provides for a method in a wireless device, of selecting random access resources for performing a random access procedure to a wireless network. The method comprises the step receiving information from a radio network node comprised in a cell of the wireless network, wherein the received information indicates at least a first and a second random access resource having different resource sizes. The method further comprises selecting one of said at least first and a second random access resources based on an expected uplink power received by the radio network node and transmitting a random access message to said wireless network using the selected resource. The disclosure further relates to methods for providing random access resources, as well as to a wireless device, and to radio network nodes of a wireless network.

31 citations

Journal ArticleDOI
TL;DR: Both the proposed methods offer significant performance improvements as compared to the conventional CR downlink beamforming, while guaranteeing the QoS of primary users on an instantaneous basis, in contrast to the average QoS guarantees of conventional beamformers.
Abstract: This paper introduces novel transmit precoding approaches for the cognitive radio (CR) Z-channel. The proposed transmission schemes exploit noncausal information about the interference at the secondary base station to redesign the CR precoding optimization problem. This is done with the objective to improve the quality of service (QoS) of secondary users by taking advantage of constructive interference in the secondary link. The precoders are designed to minimize the worst secondary user's symbol error probability (SEP) under constraints on the instantaneous total transmit power, and the power of the instantaneous interference in the primary link. The problem is formulated as a bivariate probabilistic constrained programming (BPCP) problem. We show that the BPCP problem can be transformed for practical SEPs into a convex optimization problem that can be solved, for example, by the barrier method. A computationally efficient tight approximate approach is also developed to compute the near-optimal solutions. Simulation results and analysis show that the average computational complexity per downlink frame of the proposed approximate problem is comparable to that of the conventional CR downlink beamforming problem. In addition, both the proposed methods offer significant performance improvements as compared to the conventional CR downlink beamforming, while guaranteeing the QoS of primary users on an instantaneous basis, in contrast to the average QoS guarantees of conventional beamformers.

31 citations


Cites background or methods from "4G: LTE/LTE-Advanced for Mobile Bro..."

  • ...Existing studies in the traditional networks have shown that the QoS can be improved by exploiting the spatial domain with the use of multiple antennas at the SBS [8], [9]....

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  • ...Several beamforming techniques haven been developed for the conventional wireless downlink to amplify the signal an d suppress the interference by exploiting the CSI [8]–[16]....

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Journal ArticleDOI
TL;DR: In this article, a metal-rimmed multiple-input multiple-output (MIMO) antenna design operating below the 1 GHz frequency band is proposed that offers a wide bandwidth, high isolation, low correlation, and compact size.
Abstract: A metal-rimmed multiple-input multiple-output (MIMO) antenna design operating below the 1 GHz frequency band is proposed that offers a wide bandwidth, high isolation, low correlation, and compact size. The proposed technique is based on metal-rimmed mobile phones with four gaps, and the overall design occupies a small size in the ground plane. Orthogonal ground mode resonances are controlled to be equal to the operating frequencies, providing high antenna performance and good diversity performance. The proposed main antenna is achieved by utilizing the upper-side rim to tune the ground mode resonance along the length of the ground plane to be equal to the operating frequency; moreover, a coupling slot couples strongly with the ground mode resonance to achieve a -6 dB bandwidth from 0.695 to 1 GHz (305 MHz). The orthogonal ground mode along the width of the ground plane is used for diversity antenna design. Similarly, the ground mode resonance is made equal to the operating frequency by controlling the left-side metal rim such that a simulated -6 dB bandwidth from 0.850 to 0.920 GHz (70 MHz) is achieved. The simulated isolation is more than 11.5 dB in the operating band, and the measured envelope correlation coefficients is below 0.1.

31 citations

Proceedings ArticleDOI
31 Mar 2014
TL;DR: T-Fuzz is presented - a novel fuzzing framework that integrates with existing conformance testing environment and has shown to enhance the existing development already in place by finding previously unseen unexpected behaviour in the system.
Abstract: Telecommunication networks are crucial in today's society since critical socio-economical and governmental functions depend upon them. High availability requirements, such as the "five nines" uptime availability, permeate the development of telecommunication applications from their design to their deployment. In this context, robustness testing plays a fundamental role in software quality assurance. We present T-Fuzz - a novel fuzzing framework that integrates with existing conformance testing environment. Automated model extraction of telecommunication protocols is provided to enable better code testing coverage. The T-Fuzz prototype has been fully implemented and tested on the implementation of a common LTE protocol within existing testing facilities. We provide an evaluation of our framework from both a technical and a qualitative point of view based on feedback from key testers. T-Fuzz has shown to enhance the existing development already in place by finding previously unseen unexpected behaviour in the system. Furthermore, according to the testers, T-Fuzz is easy to use and would likely result in time savings as well as more robust code.

31 citations


Cites methods from "4G: LTE/LTE-Advanced for Mobile Bro..."

  • ...Finally, we briefly introduce the fuzzing testing technique....

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