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3G Evolution : HSPA and LTE for Mobile Broadband

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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Dissertation
02 May 2017
TL;DR: In this article, a backward shifted coding (BSC) scheme is proposed to improve the quality of experience (QoE) of the users in DASH/BSC system.
Abstract: Due to the growth of video traffic over the Internet in recent years, HTTP AdaptiveStreaming (HAS) solution becomes the most popular streaming technology because ithas been succesfully adopted by the different actors in Internet video ecosystem. Itallows the service providers to use traditional stateless web servers and mobile edgecaches for streaming videos. Further, it allows users to access media content frombehind Firewalls and NATs.In this thesis we focus on the design of a novel video streaming delivery solutioncalled Backward-Shifted Coding (BSC), a complementary solution to Dynamic AdaptiveStreaming over HTTP (DASH), the standard version of HAS. We first describe theBackward-Shifted Coding scheme architecture based on the multi-layer Scalable VideoCoding (SVC). We also discuss the implementation of BSC protocol in DASH environment.Then, we perform the analytical evaluation of the Backward-Sihifted Codingusing results from queueing theory. The analytical results show that BSC considerablydecreases the video playback interruption which is the worst event that users can experienceduring the video session. Therefore, we design bitrate adaptation algorithms inorder to enhance the Quality of Experience (QoE) of the users in DASH/BSC system.The results of the proposed adaptation algorithms show that the flexibility of BSC allowsus to improve both the video quality and the variations of the quality during thestreaming session.Finally, we propose new caching policies to be used with video contents encodedusing SVC. Indeed, in DASH/BSC system, cache servers are deployed to make contentsclosed to the users in order to reduce network latency and improve user-perceived experience.We use Linear Programming to obtain optimal static cache composition tocompare with the results of our proposed algorithms. We show that these algorithmsincrease the system overall hit ratio and offload the backhaul links by decreasing thefetched content from the origin web servers.

3 citations

Proceedings ArticleDOI
01 Dec 2013
TL;DR: This paper forms the UL scheduling problem with proportional fairness support by taking two constraints into consideration, and develops one heuristic algorithm that demonstrates that competitive performance can be achieved in terms of system throughput.
Abstract: Due to the power consumption issue of user equipment (UE), Single-Carrier FDMA (SC-FDMA) has been selected as the uplink multiple access scheme of 3GPP Long Term Evolution (LTE). Similar to OFDMA downlink, SC-FDMA enables multiple UEs to be served simultaneously in uplink as well. However, the single carrier characteristic requires that all the allocated subcarriers to a UE must be contiguous in frequency with each time slot. Moreover, a UE should adopt the same modulation and coding scheme at all allocated subcarriers. These two constraints do limit the scheduling flexibility. In this paper, we formulate the UL scheduling problem with proportional fairness support by taking two constraints into consideration. Since this optimization had been proven to be an NP-hard problem, we further develop one heuristic algorithm. We demonstrate that competitive performance can be achieved in terms of system throughput, which is evaluated by using 3GPP LTE system model simulations.

3 citations


Additional excerpts

  • ...Furthermore, the RB rates are known, and , =[3, 7, 10, 8, 4], , =[3, 5, 2, 10, 5], and , =[3, 2, 1, 3, 3], j=1, 2, .., 5....

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Dissertation
22 Nov 2011
TL;DR: This thesis investigates a virtual-MIMO wireless syste m using the receiver-side cooperation with the compress-and-forward (CF) protocol, and proves that the smallest singular value of the cooperative channel matrix determine s th system error performance.
Abstract: Multiple-input multiple-output (MIMO) systems have recen tly emerged as one of the most significant wireless techniques, as they can greatly improv e the channel capacity and link reliability of wireless communications. These benefits have e ncouraged extensive research on a virtual MIMO system where the transmitter has multiple ante n as and each of the receivers has a single antenna. Single-antenna receivers can work togeth er to form a virtual antenna array and reap some performance benefits of MIMO systems. The idea of re ceiv r-side local cooperation is attractive for wireless networks since a wireless receiv er may not have multiple antennas due to size and cost limitations. In this thesis we investigate a virtual-MIMO wireless syste m using the receiver-side cooperation with the compress-and-forward (CF) protocol. Firstly, to p erform CF at the relay, we propose to use standard source coding techniques, based on the analy sis of its expected rate bound and the tightness of the bound. We state upper bounds on the syste m error probabilities over block fading channels. With sufficient source coding rates, the co operation of the receivers enables the virtual-MIMO system to achieve almost ideal MIMO perfor mance. A comparison of ideal and non-ideal conference links within the receiver group is also investigated. Considering the short-range communication and using a channel-aware adapt ive CF scheme, the impact of the non-ideal cooperation link is too slight to impair the syste m performance significantly. It is also evident that the practicality of CF cooperation wi ll be greatly enhanced if a efficient source coding technique can be used at the relay. It is even mo re desirable that CF cooperation should not be unduly sensitive to carrier frequency off sets (CFOs). Thus this thesis then presents a practical study of these two issues. Codebook des igns of the Voronoi VQ and the tree-structure vector quantization (TSVQ) to enable CF coo peration at the relay are firstly described. A comparison in terms of the codebook design comple xity and encoding complexity is presented. It is shown that the TSVQ is much simpler to desi gn and operate, and can achieve a favourable performance-complexity tradeoff. We then dem onstrate that CFO can lead to significant performance degradation for the virtual MIMO syste m. To overcome it, it is proposed to maintain clock synchronization and jointly estimate the CFO between the relay and the destination. This approach is shown to provide a significant per formance improvement. Finally, we extend the study to the minimum mean square error (MMSE) detection, as it has a lower complexity compared to maximum likelihood (ML) dete ction. A closed-form upper bound for the system error probability is derived, based on w hich we prove that the smallest singular value of the cooperative channel matrix determine s th system error performance. Accordingly, an adaptive modulation and cooperation scheme i s proposed, which uses the smallest singular value as the threshold strategy. Depending on the i nstantaneous channel conditions, the system could therefore adapt to choose a suitable modula tion type for transmission and an appropriate quantization rate to perform CF cooperation. T he adaptive modulation and cooperation scheme not only enables the system to achieve comparab le performance to the case with fixed quantization rates, but also eliminates unnecessary c omplexity for quantization operations and conference link communication. Declaration of originality I hereby declare that the research recorded in this thesis an d the thesis itself was composed and originated entirely by myself in the School of Engineering a t The University of Edinburgh.

3 citations


Cites methods from "3G Evolution : HSPA and LTE for Mob..."

  • ...Note that the adaptive modulation scheme studied here switc hes between QPSK, 16QAM and 64QAM modulations, but the approach could easily be extende d to multiple modulation and coding rate choices, for example, applied to High Speed Pack et Access (HSPA) and Long Term Evolution (LTE) systems [111]....

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13 Nov 2014
TL;DR: This work addresses the design of linear precoders and receivers in multiuser Multiple-Input Multiple-Output (MIMO) downlink channels using Orthogonal Frequency Division Multiplexing (OFDM) modulation when only partial Channel State Information is available at the transmitter.
Abstract: This work addresses the design of linear precoders and receivers in multiuser Multiple-Input Multiple-Output (MIMO) downlink channels using Orthogonal Frequency Division Multiplexing (OFDM) modulation when only partial Channel State Information (CSI) is available at the transmitter. Our aim is to minimize the total transmit power subject to per-user Quality-of-Service (QoS) constraints expressed as per-user rates. We propose a gradient-projection algorithm to optimally distribute the per-user rates among the OFDM subcarriers. Then, another algorithm is used to obtain the persubcarrier precoders and receivers that minimize the overall transmit power. Based on the Minimum Mean Square Error (MMSE) duality between the MIMO Broadcast Channel (BC) and the MIMO Multiple Access Channel (MAC), both algorithms perform an Alternating Optimization (AO).

3 citations

Journal ArticleDOI
01 Apr 2014
TL;DR: In this article, the authors proposed a 16-ary Amplitude Phase Shift Keying (16-APSK) modulation scheme for SC-FDMA instead of conventional M-QAM.
Abstract: Single Carrier Frequency Division Multiplexing (SC-FDMA) scheme has been considered to be promising technology for the uplink of the 4G mobile communication systems. The main disadvantage of SC-FDMA is the high envelope fluctuation of signal resulting in a presence of nonlinear distortion in transmitted signal due to the transmitter high power amplifier (HPA). In order to improve the SC-FDMA performance, the 16-ary Amplitude Phase Shift Keying (16-APSK) is proposed as a base-band modulation scheme for SC-FDMA instead of conventional M-QAM. The different types of 16-APSK modulations will be investigated and positions of constellation points will be optimized according to maximizing Mutual Information (MI) criteria. For given value of SNR will be found optimal 16-APSK modulation and it will be proposed adaptive approach of 16-APSK modulation. The performance properties of adaptive approach of 16-APSK and 16-QAM based SC-FDMA transmission scheme will be illustrated using numerical results. The obtained results will show that optimized 16-APSK modulation in SC-FDMA transmitted system provide better performance than 16-QAM SC-FDMA system if the nonlinear model of HPA has to be assumed.

3 citations


Cites methods from "3G Evolution : HSPA and LTE for Mob..."

  • ...For given value of SNR will be found optimal 16-APSK modulation and it will be proposed adaptive approach of 16-APSK modulation....

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