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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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Journal ArticleDOI
TL;DR: A new radio (NR) resource scheduling scheme designed to jointly manage this heterogeneous traffic in downlink OFDMA-based 5G NR, called enhanced joint scheduling (eJS) scheme, which aims at guaranteeing the minimum data rate requirements of accommodated data radio bearers.
Abstract: Next 5G networks will support different kind of services covering a large number of use cases with very distinct quality of service (QoS) requirements. In particular, in enhanced mobile BroadBand usage scenarios, guaranteed bit rate (GBR) services with minimum GBR requirements and non-GBR services are provided. In the 5G radio access network, the data flows for these services are mapped into GBR data radio bearers (GBR DRBs) and non-GBR DRBs, respectively. This paper presents a new radio (NR) resource scheduling scheme designed to jointly manage this heterogeneous traffic in downlink OFDMA-based 5G NR. More specifically, our approach provides for a QoS aware joint scheduling framework, called enhanced joint scheduling (eJS) scheme, which aims at guaranteeing the minimum data rate requirements of accommodated data radio bearers. In this framework any chosen scheduling strategy can be implemented. In particular, we propose two different channel aware scheduling strategies, at the aim of being able to choose a different trade-off between the goals of maximizing the system throughput and reaching the fairness among DRBs. Moreover, the eJS scheme is designed to work well in realistic scenarios where non-ideal connection admission controls are adopted. We benchmark our eJS scheme against other existing scheduling schemes via a several number of simulations, under different traffic and channel conditions. The comparative analysis shows that our joint control scheme outperforms the reference schemes in terms of throughput and fairness, while satisfying a larger number of GBR DRBs.

12 citations

Proceedings ArticleDOI
01 Sep 2011
TL;DR: It is demonstrated that HARQ with CC allows to communicate at a rate close to the ergodic capacity, especially at low and medium SNR, which makes HARQ very attractive for V2V communications.
Abstract: In this paper, we study the performance of hybrid automatic repeat request (HARQ) with code combining (CC) over double Rayleigh channels. This channel can be utilized to model the fading envelope of vehicle-to-vehicle (V2V) channels. We derive analytical solutions for the characteristic quantities of double Rayleigh channels, such as the outage probability, the ergodic capacity, and the bit error probability (BEP). Moreover, we study the performance of HARQ with CC. Our analysis focuses on information theoretic aspects of HARQ with CC. closed-form analytical approximations are derived for the e-outage capacity, the average number of transmissions, and the average transmission rate of HARQ with CC assuming a maximum number of rounds M for the HARQ protocol. In our study, the communication rate per HARQ round is adjusted to the average signal-to-noise ratio (SNR) such that a target outage probability e is not exceeded. This setting is conform with modern communication systems, in which a quality of service should be ensured independently of the channel conditions. We demonstrate that HARQ with CC allows to communicate at a rate close to the ergodic capacity, especially at low and medium SNR. This rate is achieved in absence of channel state information (CSI) at the transmitter. This feature makes HARQ very attractive for V2V communications. In fact, in V2V channels, the coherence time is too short to allow for feedback of the instantaneous channel conditions from the receiver to the transmitter.

12 citations


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

  • ...HARQ is widely used in contemporary communication systems such as High Speed Packet Access (HSPA) and Long Term Evolution (LTE) [2]....

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Proceedings ArticleDOI
01 Dec 2009
TL;DR: The new scheme is compared to the well known algorithm of Cox and Schmidl, also using two training symbols, and found to outperform it especially in timing acquisition for both AWGN and Rayleigh channels.
Abstract: In this contribution, we propose a novel scheme for time and frequency synchronization in OFDM systems. A differential modulation is indeed used to design two training symbols with appropriate properties used as a preamble for the detection of the frame start and for the recovery of the integral carrier frequency offset. The new scheme is compared to the well known algorithm of Cox and Schmidl, also using two training symbols, and found to outperform it especially in timing acquisition for both AWGN and Rayleigh channels. As a byproduct, an estimator for the channel power profile is obtained. All the derived estimators performance depend on the choice of the symbols involved in training. We here discuss the properties for optimal performance and compare the results for a set of Gold, Kasami and Zadoff-Chu sequences.

12 citations


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

  • ...Following reference signals choice requirements in LTE [10], we here consider and compare the relevance of constant amplitude with good time domain auto correlation properties sequences....

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  • ...Also, the mobile standard 3GPP LTE air interface named HSOPA (High Speed OFDM Packet Access) uses OFDM....

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  • ...Namely, a set of Gold and Kasami sequences will be considered besides of a set of Constant Amplitude Zero Auto Correlation (CAZAC) sequences named Zadoff-Chu sequences [10]....

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Proceedings ArticleDOI
09 Jun 2013
TL;DR: It is shown that, by adding a few users in only one or two groups, the overall system performance can be improved significantly, and it is proved that multiuser diversity gain scales with the number of users if the authors add an equal number of Users in all three groups.
Abstract: In this paper, a MIMO-Y channel based three-group information exchange problem is considered, where users from each group would like to exchange information with the other users in another two groups. In particular, a Max-Min user selection is proposed, which aims to harvest the multiuser diversity gain for reliable transmission in the MIMO-Y channel. The impacts of user configurations on the multiuser diversity gains are investigated by theoretical bounds as well as numerical results. It is shown that, by adding a few users in only one or two groups, the overall system performance can be improved significantly. This observation reveals an interesting behavior of MIMO-Y channel, i.e., the local configuration has a global impact. However, we prove that such asymmetrical multiuser diversity gain does not scale with the number of users. Finally, we show that multiuser diversity gain scales with the number of users if we add an equal number of users in all three groups.

12 citations


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

  • ...Due to limited size and power supply, the UE is usually equipped with limited number of antennas [8]....

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Journal ArticleDOI
TL;DR: The analyses show that free and paid access to TV white space complement each other; and that despite considerable infrastructure costs, the bicameral geo-location database is positioned to create viable TV white spaces exploitation value chains; hence have the most optimal technological, business and regulatory prospects.

12 citations