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
Citations
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14 Nov 2014
TL;DR: Results of this paper show that by adopting proposed traffic handling strategy, capacity of the network can be increased.
Abstract: The target of this paper is to investigate different traffic handling strategies to increase the capacity of the network. Impact of deploying UMTS900 with other GSM900/1800 and UMTS2100 layer was also observed in terms of capacity of the network. Number of mobile users is increasing enormously, and it is expected that the demand for data services and different kind of multimedia services will grow with accelerated pace. UMTS2100 has been deployed to meet the requirement of data services. But due to higher frequency band of operation, signals at higher frequencies experience more path loss. Therefore, to provide better coverage to indoor data users more sites of UMTS2100 are required. UMTS900 deployment provides the solution for high deployment cost, and it provides the better coverage as compared to UMTS2100. The deployment of UMTS900 as an overlay with UMTS2100 also helps in enhancing the network capacity, both for the voice traffic and data traffic. A position and service based call handling scheme is proposed in this paper. Results of this paper show that by adopting proposed traffic handling strategy, capacity of the network can be increased.
5 citations
Cites background or methods from "3G Evolution : HSPA and LTE for Mob..."
...To improve the capacity, spectral efficiency and Signal to Interference plus Noise Ratio (SINR), advanced antenna solutions such as spatial multiplexing through conventional Multiple Input Multiple Output (MIMO) antenna system, distributed antenna system, higher order sectorization, multiple fixed beam antennas, switched beam antennas, smart antennas for beamforming, advanced adaptive antenna [10], and massive MIMO system [11] can be employed....
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...It covers the desired cell area with finite number of narrow fixed beams, where each beam can serve multiple users [10, 58]....
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...Spectral efficiency of a system can be improved by employing advanced Multiple Input and Multiple Output (MIMO) antennas, and smart antenna solutions [10]....
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TL;DR: A simulation model is proposed to evaluate different pricing strategies and their contribution margin impact for the mobile telecommunication industry and recommends fair use flat rates with a lower usage threshold of 1 or 3 GB which leads to an improved contribution margin.
Abstract: Die Fair-Use-Flatrate ist eine vielversprechende neue Tarifart, die verstarkt im Zugangsgeschaft zum mobilen Internet eingesetzt wird. Vergleichbar mit einer klassischen Flatrate gestattet sie die unbegrenzte Nutzung zu einem festen monatlichen Preis, drosselt allerdings die Geschwindigkeit nach Uberschreitung eines bestimmten Transfervolumens. Gegenwartig findet mit der weltweiten Einfuhrung von LTE (Long Term Evolution) eine Veranderung der Markt und Kostenstruktur der Telekommunikationsanbieter statt, wodurch der Einsatz und die Ausgestaltung von Fair-Use-Flatrates neu zu bewerten sind. Hierfur schlagen wir den Einsatz eines Simulationsmodells vor, um die Auswirkung unterschiedlicher Strategien auf den Deckungsbeitrag zu evaluieren. Zentraler Bestandteil dieses Modells ist die Durchfuhrung eines Discrete-Choice-Experiments zur Schatzung der Praferenzen und des Verhaltens von Kunden. Auf Basis der Praferenzerhebung und der Simulationsergebnisse lassen sich folgende Empfehlungen fur eine optimale Preisstrategie fur das mobile Internet aussprechen: Klassische Flatrates konnen aufgrund der aktuellen Kostensituation nicht profitabel am Markt angeboten werden. Stattdessen fuhren Fair-Use-Fatrates mit niedrigen Volumengrenzen von 1 oder 3 GB zu einer deutlichen Steigerung des Deckungsbeitrags. Dabei spielt die Ubertragungsgeschwindigkeit fur den wahrgenommenen Nutzen der Kunden nur eine eingeschrankte Rolle. Neue Mobilfunktechnologien wie LTE sollten daher vorwiegend mit dem Ziel der Kostenoptimierung statt einer vermuteten erhohten Zahlungsbereitschaft der Kunden eingefuhrt werden.
5 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...3.2 Der Hoffnungsträger: LTE Während HSPA technologisch weitestgehend auf UMTS aufbaut, steht mit dem Übergang auf dem durch das 3rd Generation Partnership Project als internationalen Standard entwickelten Long Term Evolution (LTE) ein tiefgreifender Generationswechsel bevor (Dahlman et al. 2008)1....
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...Diese Adoptionsbarriere wurde schließlich mit dem weltweit eingeleiteten Roll-Out des technologischen Standards High Speed Packet Access (HSPA) im Jahr 2007 überwunden und ermöglicht Übertragungsraten von bis zu 7,2 Mbit/s, vergleichbar mit einem DSL-Festnetzanschlusses (Dahlman et al. 2008)....
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01 Jan 2014
TL;DR: In this article, the spatial dimension in a coordinated manner has been shown to be a fruitful technique for improving the spectral efficiency in wireless interference net. But it is not suitable for wireless interference networks.
Abstract: Enabling multiple base stations to utilize the spatial dimension in a coordinated manner has been shown to be a fruitful technique for improving the spectral efficiency in wireless interference net ...
5 citations
01 Nov 2016
TL;DR: A hierarchical blockage model where, an arbitrary path (LOS or NLOS) undergoes a blockage with probability p independent of the other paths is proposed, implying that, the range of reliable communication shrinks in the presence of environmental blockages.
Abstract: Future systems of the 5th generation are slated to use the mm-wave bands due to the large slices of bandwidth available at those frequencies. Relative to the contemporary microwave bands, to compensate for the harsh propagation conditions, highly directional communication using beamforming methods is necessary to achieve a level of reliable communication, however minimal. Due to the fragile nature of directional communication (especially in dense urban environments or high mobility environments), there is a need to understand the effect of blockages on the system performance. Blockages on links (post beamforming) necessitate time and power expensive mechanisms such as beam adaptation or even re-training the beam setup. In systems aiming for less than 1ms latency, this can be impracticable. While the channel modeling effort for mm-wave bands is underway, the nature of environmental blockages for outdoor cellular communications is still not well understood. In this paper, to study the impact of blockages, in addition to the real-world challenges of mm-wave communications, we propose a hierarchical blockage model where, an arbitrary path (LOS or NLOS) undergoes a blockage with probability p (model parameter) independent of the other paths. Our results show that, even in the event of an unblocked LOS, there is a notable degradation in the received SNR. We also show that the increase in the path loss due to a severe level of environmental blockages is about 15dB relative to environments with a low level of blockages, for a distance of 150m which is approximately the envisioned cell radius for 5G cellular systems. Thus implying that, the range of reliable communication shrinks in the presence of environmental blockages.
5 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...In addition to the frequency dependent free-space path loss (upto 30dB relative to the currently deployed 2GHz cellular frequency [6]), penetration losses due to commonly used building materials such as concrete and bricks can be upwards of 150 dB [3]....
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Dissertation•
23 Jan 2012
TL;DR: In this paper, a novel design technique for tunable filters with controlled and predictable bandwidth variation is presented along with an analysis and modeling method for predicting the final filter response during design optimization.
Abstract: Multi-band and multi-mode radios are becoming prevalent and necessary in order to provide optimal data rates across a network with a diverse and spotty landscape of coverage areas (3G, HSPA, LTE, etc.). As the number of required bands and modes increases, the aggregate cost of discrete RF signal chains justifies the adoption of tunable solutions. Tunable filters are one of the pieces crucial to signal chain amalgamation. The main requirements for a tunable filter are high unloaded quality factor, wide tuning range, high tuning speed, high linearity, and small size. MEMS technology is the most promising in terms of tuning range, quality factor, linearity and size. In addition, a filter that maintains a constant passband bandwidth as the center frequency is tuned is preferred since the analog baseband processing circuitry tends to be tailored for a particular signal bandwidth. In this work, a novel design technique for tunable filters with controlled and predictable bandwidth variation is presented. The design technique is presented alongside an analysis and modeling method for predicting the final filter response during design optimization. The method is based on the well known coupling matrix model. In order to demonstrate the design and modeling technique, a novel coupling structure for stripline filters is presented that results in substantial improvements in coupling bandwidth variation over an octave tuning range when compared to combline and interdigitated coupled line filters. In order for a coupled resonator filter to produce an equal ripple Chebyshev response, each resonator of the filter must be tuned to precisely the same resonant frequency. Production tuned filters are routinely tuned in the lab and production environments by skilled technicians in order to compensate for manufacturing tolerances. However, integrated tunable filters cannot be tuned by traditional means since they are integrated into systems on circuit boards or inside front end modules. A fixed tuning table for all manufactured modules is inadequate since the required tuning accuracy exceeds the tolerance of the tuning elements. In this work, we develop tuning techniques for the automatic in-circuit tuning of tunable filters using scalar transmission measurement. The scalar transmission based techniques obviate the use of directional couplers. Techniques based on both swept and single frequency scalar transmission measurement are developed. The swept frequency technique, based on the Hilbert transform derived relative group
5 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...1: Frequency bands as defined by the 3GPP [5]....
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...1 Frequency bands as defined by the 3GPP [5]....
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