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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TL;DR: Fairness-oriented packet scheduling schemes with power-efficient control mechanism for future packet radio systems are proposed and it is demonstrated that by using the proposed power-aware multi-user scheduling schemes, significant coverage and fairness improvements can be obtained, at the expense of average throughput loss.
Abstract: In this paper, we propose fairness-oriented packet scheduling (PS) schemes with power-efficient control mechanism for future packet radio systems In general, the radio resource management functionality plays an important role in new OFDMA based networks The control of the network resource division among the users is performed by packet scheduling functionality based on maximizing cell coverage and capacity satisfying, and certain quality of service requirements Moreover, multiantenna transmit-receive schemes provide additional flexibility to packet scheduler functionality In order to mitigate inter-cell and co-channel interference problems in OFDMA cellular networks soft frequency reuse with different power masks patterns is used Stemming from the earlier enhanced proportional fair scheduler studies for single-input multiple-output (SIMO) and multiple-input multipleoutput (MIMO) systems, we extend the development of efficient packet scheduling algorithms by adding transmit power considerations in the overall priority metrics calculations and scheduling decisions Furthermore, we evaluate the proposed scheduling schemes by simulating practical orthogonal frequency division multiple access (OFDMA) based packet radio system in terms of throughput, coverage and fairness distribution among users As a concrete example, under reduced overall transmit power constraint and unequal power distribution for different sub-bands, we demonstrate that by using the proposed power-aware multi-user scheduling schemes, significant coverage and fairness improvements in the order of 70% and 20%, respectively, can be obtained, at the expense of average throughput loss of only 15%
6 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...…fair scheduler studies for single-input multiple-output (SIMO) and multiple-input multipleoutput (MIMO) systems, we extend the development of efficient packet scheduling algorithms by adding transmit power considerations in the overall priority metrics calculations and scheduling decisions....
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...Notice that if the sub-band allocated to the cell-edge UEs is not fully occupied, it can be still used by the other UEs....
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...KEYWORDS Radio Resource Management, Packet Scheduling, Soft Frequency Reuse, Proportional-fair, Power Masks, Channel Quality Feedback, Fairness, Throughput...
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25 Sep 2015
TL;DR: In this article, a comparative analysis over simulation in a virtual environment (Simulink Based) for these two types of digital modulation schemes in 4G and beyond 4G communication architecture is presented.
Abstract: In recent days, there have been a race among the communication systems in different schemes and generations. Day by day the data transmission rate is increasing and breaking the record of previous generations. Now, people are thinking of transmitting data beyond imagination. Also, engineers and scientists are also stepping forward for transmitting in a huge range of data. In recent times, 4th Generation and 5th Generation communication system are on transitional state. 4th Generation is almost getting replaced with 5th Generation communication architecture. For LTE and beyond LTE communication system several types of digital modulation schemes are used. Among them QPSK and QAM are quite frequently used. In this research paper, comparative analysis over simulation in a virtual environment (Simulink Based) for these two types of digital modulation schemes in 4G and beyond 4G communication architecture. In both of the cases, BER (Bit Error Rate) with respect to SNR (Signal to Noise Ratio) have been compared for the better and efficient output.
6 citations
Dissertation•
01 Jan 2011
TL;DR: This doctoral thesis aims to address several key issues in optimal multiple-antenna system design for compact multi-band MIMO terminals, with the first half focusing on the performance characterization of such terminals in the presence of user interaction and propagation channel, under the challenging constraint that the terminals are compact.
Abstract: Co-band multiple-antenna implementation in compact user terminals is necessary for harvesting the full potential of diversity and multiple-input multiple-output (MIMO) technology in cellular communication systems. The recent worldwide deployment of Long Term Evolution (LTE), which requires the use of MIMO technology in the downlink, adds to the urgency of achieving both practical and optimal multiple-antenna systems in user terminals. Contrary to conventional understanding, an optimal multiple-antenna implementation does not only involve the design and placement of antenna elements in the terminals, but extends beyond the antenna elements and common antenna parameters to comprise interactions with the near field user and the propagation environment. Moreover, these interactions are non-static, which implies that the multiple-antenna system must adapt to the prevailing overall communication channel in order to assure the highest performance gains. This doctoral thesis aims to address several key issues in optimal multiple-antenna system design for compact multi-band MIMO terminals, with the first half (Papers I to III) focusing on the performance characterization of such terminals in the presence of user interaction and propagation channel, under the challenging constraint that the terminals are compact. The second half of the thesis (Papers IV to VI) considers two performance enhancement approaches suitable for compact MIMO terminals in realistic usage conditions. In particular, the potential benefits of harmonizing compact multiple-antenna systems with the propagation channel and user influence are determined with respect to reconfigurability in antenna patterns and impedance matching circuits.
In Paper I, the diversity performance of internal multiple antennas with multi-band coverage in a mock-up with the size of a typical mobile handset is investigated in different user interaction scenarios. For comparison, a second mock-up with only one multi-band antenna is also evaluated in the same user cases. An ideal uniform propagation environment is assumed. The performance at frequency bands below and above 1 GHz are presented and analyzed in detail.
Paper II extends the study in Paper I by evaluating the single-input multiple-output (SIMO) and MIMO capacity performance of the same antenna prototypes under the same user interaction scenarios and propagation environment.
In Paper III, the impacts of gain imbalance and antenna separation on the throughput performance of a dual-dipole configuration are studied at frequencies below and above 1 GHz in a repeatable dynamic multi-path environment, using a live HSPA network. Since the compactness of a user terminal has implications on the antenna separation and gain imbalance of the multiple antennas, the focus is to gain knowledge on how these two factors affect the end user experience in practice.
In Paper IV, three simple dual-antenna topologies implemented in compact smart phone prototypes of identical form factors are evaluated in MIMO channel measurements in noise-limited and interference-limited urban scenarios. Each dual-antenna topology is intentionally designed to provide a distinct set of antenna patterns. The goal is to investigate the potential of antenna system design as one of the key performance differentiators in real terminal implementations.
Paper V extends the work in Paper IV by introducing user interaction to the same MIMO channel measurement setup. Furthermore, the focus of this paper is on the evaluation of both the average and local channel performances and their potential enhancements.
Finally, Paper VI ascertains the potential capacity gains of applying uncoupled adaptive matching to a compact dual-antenna terminal in an indoor office environment, under a realistic user scenario. The performance gains are evaluated by means of extensive MIMO channel measurements at frequency bands below and above 1 GHz.
6 citations
Cites background or methods from "3G Evolution : HSPA and LTE for Mob..."
...For example, the implementation of dual RX antennas is available as an option for UEs in the HSPA family of standards (3GPP Release 6 and onwards) and it is the minimum requirement in the LTE cellular communication system (from 3GPP Release 8 and onwards) [2]....
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..., full rank), the “multi-stream” communication is enabled through spatial multiplexing [2]....
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11 Dec 2013
6 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...Therefore LTE network has been designed to support only packet-switched traffic with seamless Internet Protocol (IP) connectivity between UE and SAE gateway [5]....
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...The RLC layer is responsible for segmentation/concatenation, retransmission handling, and in-sequence delivery to PDCP layer [5, 6]....
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...Therefore, it can be seen as a local mobility anchor to the eNBs [5]....
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...On the other hand, with TDD transmissions, there is only a single carrier frequency and uplink and downlink transmissions are separated in the time domain on that single cell [5]....
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...The amount of data traffic and customer demand have caused great pressure on mobile industry and it is already hard to find a technical solution that would allow mobile networks to meet the growing demand for wireless broadband services [5]....
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30 Dec 2010
TL;DR: Results of the IEEE 802.16m and 3GPP LTE Release 10 technologies evaluation obtained by the Russian Evaluation Group (REG) show that performance of both IEEE and3GPP technologies meets the IMT-Advanced requirements for all the considered evaluation scenarios.
Abstract: The IMT-Advanced standardization process is executed by International Telecommunications Union Radiocommunication Sector (ITU-R) to define requirements to the next 4-th generation mobile communication systems and certify technologies meeting these requirements. This work presents results of the IEEE 802.16m and 3GPP LTE Release 10 technologies evaluation obtained by the Russian Evaluation Group (REG) as part of the ITU-R IMT-Advanced standardization process. The evaluation was done mainly by system level simulations and considered four mandatory test environments of IMT-Advanced: indoor, microcellular, base coverage urban and high speed. Cell spectral efficiency and cell-edge user spectral efficiency were evaluated for downlink and uplink transmissions. It was found out that performance of both IEEE and 3GPP technologies meets the IMT-Advanced requirements for all the considered evaluation scenarios. This conclusion was conveyed by the REG to ITU in the evaluation report submitted in June 2010.
6 citations