Book•
3G Evolution : HSPA and LTE for Mobile Broadband
31 Jul 2007-
TL;DR: In this paper, the authors present a very up-to-date and practical book, written by engineers working closely in 3GPP, gives insight into the newest technologies and standards adopted by threeGPP with detailed explanations of the specific solutions chosen and their implementation in HSPA and LTE.
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
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30 Nov 2012
TL;DR: The results show that compared to dedicated indoor systems, similar indoor performance can be provided by extending macrocellular coverage inside buildings using an outdoor-to-indoor repeater or a dedicated indoor system with various antenna and cell configurations.
Abstract: T he capacity requirements of cellular networks continue to grow. This has forced cellular operators to seek new ways of improving the availability and transmission rate experienced by users. The majority of cellular network data users are located inside buildings, where coverage is difficult to ensure due to high penetration loss. Indoor users also cause high load to outdoor networks, reducing the quality and availability for outdoor users. This has given rise to a growing need for implementing dedicated indoor systems, and further optimizing their performance to provide high capacity. It was estimated that in 2011 there were 5.37 billion mobile subscriptions in 3GPP-supported GSM, UMTS/HSPA and LTE networks, of which 890.7 million were using UMTS/HSPA. Currently, UMTS is the leading standard for providing mobile broadband, although LTE is becoming increasingly popular. The planning of radio networks is well known and documented. However, the planning and optimization of indoor networks has not been widely studied, although clear improvements in both coverage and capacity can be achieved by optimizing celland antenna line configuration. This thesis considers the special characteristics of the indoor environment with regard to radio propagation and radio network planning. The aspects of radio network planning are highlighted especially for WCDMA radio access technology. The target is to provide guidelines for indoor radio network planning and optimization using an outdoor-to-indoor repeater or a dedicated indoor system with various antenna and cell configurations. The studies conducted here are intended to provide better understanding of the indoor functionality and planning of WCDMA radio access, and UMTS cellular system including the latest HSPA updates. The studies show that the indoor performance of a high data rate WCDMA system can be improved by increasing the antenna density in the distributed antenna system, or by utilizing uplink diversity reception. It is also shown how system capacity can be further improved by adding more indoor cells to a single building. The inter-cell interference is analyzed, and the limits for cell densification are discussed. The results show that compared to dedicated indoor systems, similar indoor performance can be provided by extending macrocellular coverage inside buildings using an outdoor-to-indoor repeater. However, good performance
4 citations
TL;DR: Different types of Handover and comparison performance between different decision algorithms are focused on and a speed based Handover algorithm for macro-femto scenario is proposed with simulation results.
Abstract: LTE is an emerging wireless data communication technology to provide broadband ubiquitous Internet access. Femtocells are included in 3GPP since Release 8 to enhance the indoor network coverage and capacity. The main challenge of mobility management in hierarchical LTE structure is to guarantee efficient handover to or from/to/between Femtocells. This paper focuses, on different types of Handover and comparison performance between different decision algorithms. Furthermore, a speed based Handover algorithm for macro-femto scenario is proposed with simulation results
4 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...The LTE macro system based on flat architecture connects all the eNBs through X2 interface and the RRM procedure is done by eNB....
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...The main challenge of mobility management in hierarchical LTE structure is to guarantee efficient handover to or from/to/between Femtocells....
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...The rest of the article is organized as follows: Section.2 describes the LTE Network architecture with Femtocells, Section.3 depicts the HO types and open challenges in HO management, Section 4....
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...Different packet scheduler (PF, EXP-PF, MLWDF, FLS) are available in LTE-Sim module eNB to perform data flow and resource allocation....
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...LTE doesn’t support X2 interface between eNB and FAP and the large asymmetry in received signal strengths makes inbound and interFAP HO more complex....
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Dissertation•
12 Aug 2011
TL;DR: A distributed architecture on the mobile architecture that is secure by mitigating those attacks, efficient by solving the over dimensioning problem and cost-effective by utilizing `off the shelf' low-cost hardware in the distributed nodes is proposed.
Abstract: The 4G of mobile networks is considered a technology-opportunistic and user-centric system combining the economical and technological advantages of
various transmission technologies Part of its new architecture dubbed as the System Architecture Evolution, 4G mobile networks will implement an evolved packet core Although this will provide various critical advantages, it will however expose telecom networks to serious IP-based attacks One often adopted solution by the industry to mitigate such attacks is based on a centralized security architecture This centralized approach nonetheless, requires large processing resources to handle huge amount of traffic, which results in a significant over dimensioning problem in the centralized nodes causing this approach to fail from achieving its security task\\
In this thesis, we primarily contribute by highlighting on two Spam flooding attacks, namely RTP VoIP SPIT and SMTP SPAM and demonstrating, through simulations and comparisons, their feasibility and DoS impact on 4G mobile networks and subsequent effects on mobile network operators We further contribute by proposing a distributed architecture on the mobile architecture that is secure by mitigating those attacks, efficient by solving the over dimensioning problem and cost-effective by utilizing `off the shelf' low-cost hardware in the distributed nodes Through additional simulation and analysis, we reveal the viability and effectiveness of our approach
3 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...4 billion by 2014 and about 80% of these consumers will use mobile broadband [1]....
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...1: Broadband growth 2007–2014 [1] pool of undeserved consumers that can only be satisfied with next generation networks....
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...It consists of finding one or more generally all the occurrences of a short pattern P=P[0]P[1]· · ·P[m−1] of length m in a large text...
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...T=T[0]T[1]· · ·T[n−1] of length n, where m, n>0 and m ≤ n....
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01 Oct 2012
TL;DR: In this paper, the design and performance of fiber-optic relay node in which the antenna facing to the serving eNB and another antennafacing to UE are geographically separated via optical fiber are discussed.
Abstract: This paper presents the design and performance of fiber-optic relay node in which the antenna facing to the serving eNB and another antenna facing to UE are geographically separated via optical fiber. The way of proper arrangement of the two antennas is described considering interference between the backhaul and access links as parameters of optical fiber length and radio frequency. Theoretical CNR performance in the optical link and DUR performance due to the interference are described. Based on these results, the design examples for fiber-optic relay node are pointed out for system requirements. This strategy will play a role in realizing relaying in future mobile communication systems such as LTE-advanced and beyond.
3 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...Coordinated multipoint transmission and/or reception called CoMP is one of key technology to improve the cell-edge performance [1-4,5]....
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...Furthermore, research on LTE release 10, so-called LTE–Advanced, has been carried out, which is the candidates for IMT-Advanced [1-4]....
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01 Jan 2012
TL;DR: A computational efႡcient method for calculating the effective Signal-to-Interference-and-Noise-Ratio (SINR) mapping as advanced L2S interface for MIMO–OFDM transmission at the system-level is introduced and a fast and accurate rank adaptation method based on system level capacity is developed.
Abstract: Multi-antenna and multi-carrier wireless transmission techniques are expected to provide high peak data rates and spectral efficiency, good coverage and reliable transmission required by emerging wireless standards such as 3GPP Long Term Evolution (LTE) and 3GPP LTE-Advanced. The multi-stream transmission via Multiple-Output Multiple-Input (MIMO) systems achieves different gains using beamforming, spatial diversity and spatial multiplexing techniques. The multi-carrier modulation via Orthogonal Frequency Division Multiplexing (OFDM) enhances spectral efficiency and facilitates using simple transceiver structures for broadband communications.
MIMO-OFDM transmission impacts the design of many physical-level, system-level and radio resource management (RRM) functions as well as interaction between link and system level called Link-to-System (L2S) interface. In this thesis methods for optimizing L2S interface and RRM for MIMO-OFDM wireless systems and performance measures suitable for the system level performance evaluation are developed. The derived techniques are needed in network planning and optimization in order to analyze coverage, interference, frequency utilization, traffic loading. Moreover, they are used in dynamic system level simulations.
In this thesis a computational efficient method for calculating the effective Signal-to-Interference-and-Noise-Ratio (SINR) mapping as advanced L2S interface for MIMO-OFDM transmission at the system-level is introduced. Asymptotic distribution of the effective SINR is established. In case of fast link adaptation with adaptive modulation and coding a mixture distribution model is used. The established distribution allows to utilize system capacity measure with a confidence and to evaluate the overall system performance. A measure for ergodic system capacity is established analytically through the mean value of the effective SINR. The proposed performance measure is attractive for the system level since it incorporates the L2S model used as a quality measure of a radio link. The simulation results carried out in specific mobility scenarios in 3GPP LTE downlink network verify the analytical results and show clear impact of mobility on the system capacity. In addition, fast and accurate rank adaptation method based on system level capacity is developed. It provides efficient and computationally simple procedure for adaptation to the varying channel conditions.; Monen antennin ja usean kantoaallon hyodyntamiseen perustuvien langattomien lahetystekniikoiden odotetaan saavuttavan korkeita tiedonsiirtonopeuksia, spektritehokkuutta, hyvan kantaman, seka parantavan radioyhteyden luotettavuutta. Nama ovat vaatimuksia uusissa langattomissa standardeissa, kuten 3GPP LTE (Long Term Evolution) seka 3GPP LTE-Advanced jarjestelmissa. Monikanavaisissa moniantenni (MIMO, Multiple-Input-Multiple-Output) jarjestelmissa voidaan hyodyntaa keilanmuodostusta (beamforming), tilan monimuotoisuutta (spatial diversity) seka tilakanavointia (spatial multiplexing). Usean kantoaallon moduloiminen OFDM…
3 citations