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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TL;DR: The proposed cross-layer scheduling algorithm takes care of allocating resource blocks with different modulation and coding schemes according to target bit error rate (BER), user equipment supportable MCS, queue stability constraints and available transmit power constraints for real time applications.
Abstract: GPP has defined the long term evolution (LTE) for 3G radio access in order to maintain the future competitiveness for 3G technology, the system provides the capability of supporting a mixture of services with different quality of service (QoS) requirements. This paper proposes a new cross-layer scheduling algorithm to satisfy better QoS parameters for real time applications. The proposed algorithm takes care of allocating resource blocks (RBs) with different modulation and coding schemes (MCS) according to target bit error rate (BER), user equipment supportable MCS, queue stability constraints and available transmit power constraints. The proposed algorithm has been valued, compared with an earlier allocation algorithm in terms of service rate and packet delay and showed better performance regards the real time applications.
7 citations
Cites methods from "3G Evolution : HSPA and LTE for Mob..."
...In this paper, user-level QoS allocation algorithm has been proposed where the resources (RBs and MCS) are allocated separately and sequentially according to each user traffic profile which represents its channel condition, traffic load and QoS requirements so as to minimize the overall average…...
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TL;DR: In this article, the authors investigate how W-CDMA and LTE SEPs are globally distributed and discover SEP owners' strategies, future opportunities, and threats in their international businesses.
7 citations
01 Nov 2014
TL;DR: The results indicate that MIMO works surprisingly well and it is discussed that by combining 8×8 MIMo with carrier aggregation in future releases of 4G, it may be possible to bring gigabit internet connections to trains.
Abstract: Providing broadband passenger internet on board trains with continuous connectivity at high speeds and over large rural distances is a challenging issue. One solution to the problem is to use an onboard WiFi network connected to multiple 3G and 4G networks deployed outside the train and aggregate their combined capacity at the IP protocol level. In order to be able to provide the capacity and the data rates that tomorrow's travelers are expecting, the future 4G standard (LTE-Advance) uses a combination of high order MIMO and carrier aggregation. In this study we use the Swedish company Icomera's passenger internet system for our investigation. The system provides aggregation of multiple carrier and handover on an IP level. For about 10 years the system has in Sweden primarily been using multiple 3G communication links. However, here we present analysis and onboard measurements of a 2×2 MIMO channel to fast moving train in a live LTE 900 network. The results indicate that MIMO works surprisingly well and it is discussed that by combining 8×8 MIMO with carrier aggregation in future releases of 4G, it may be possible to bring gigabit internet connections to trains.
7 citations
Cites background or methods from "3G Evolution : HSPA and LTE for Mob..."
...2 IN Sweden the Icomera X6 or the Asynchronous Transfer System”, [2] is a the used communication system on board trai seamlessly use different access networks in (Fig....
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...Our measurements were done for 2x2 MIMO channels to X2000 trains in Sweden where the maximum train speed is 200km/h....
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...In Sweden the first commercial systems for passenger internet were deployed in 2003 by Icomera....
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...However, in Sweden there are in practice only two LTE networks and two shared 3G networks in operation....
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...Icomera’s mponents, the Icomera he X6 is installed on the teway is hosted in a X6 has built in multiple nnect more links via ter establishes multiple he Gateway and via the he X6 can host up to 6 iple for combining multiple IMO PERFORMANCE TO A SPEED In order to investigate the plausibility of achieving MIMO functionality to a moving high speed train using measurements in a live LTE 900 network, we conducted measurements along the main track between Stockholm and Gothenburg across Sweden [4]....
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24 Oct 2008
TL;DR: The system-level performance and potential capacity gain of MBSFN (Multicast/Broadcast Single Frequency Network) operation in wideband CDMA (WCDMA) is evaluated and it is compared to conventional multimedia broadcast/multicast service (MBMS) provision with macro-diversity combining.
Abstract: We evaluate the system-level performance and potential capacity gain of MBSFN (Multicast/Broadcast Single Frequency Network) operation in wideband CDMA (WCDMA) and compare it to conventional multimedia broadcast/multicast service (MBMS) provision with macro-diversity combining. MBSFN operation has recently been specified in the 3rd Generation Partnership Project (3GPP) as an enhancement to MBMS. It aims to mitigate the cell-edge problem of multicast/broadcast applications, which are typically dimensioned for a predefined coverage. In WCDMA as considered here, MBSFN operation refers to the use of a single common scrambling code and the same set of spreading codes to simultaneously broadcast bit identical MBMS data in a number of cells that form an MBMS cluster. Since intercell interference is drastically reduced by this concept, it has the potential of considerably increasing the spectral efficiency of MBMS. Nevertheless, coarse synchronization of the transmitting base stations is expected to degrade the performance of MBSFN. We study the system-level performance of MBSFN for WCDMA with imperfect synchronization of the base stations considering different equalization strategies.
7 citations
01 Mar 2017
TL;DR: A CM2M mechanism, where the primary network is based on the orthogonal frequency division multiple access technique, while the M2M communication-based secondary network uses a novel medium access control technique, named data aided cognitive technique (DACT).
Abstract: Machine to machine (M2M) communications have gained in the last years an increasing interest due to ever growing number of machine-type devices that are used in different application fields by allowing low cost and efficient communications among devices mainly in an autonomous manner. Even if M2M protocols need of dedicated resources, a new paradigm called cognitive M2M (CM2M) has been recently introduced in order to exploit cognitive/opportunistic radio communications. The aim of this paper is to outline a CM2M mechanism, where the primary network is based on the orthogonal frequency division multiple access technique, while the M2M communication-based secondary network uses a novel medium access control technique, named data aided cognitive technique (DACT). The performance of the proposed DACT protocol is derived by means of suitable analytical methods under different operational conditions. Analytical predictions are also validated by comparisons with numerical results obtained through computer simulations, in order to show the effectiveness of the proposed solution in terms of throughput, delay, resource wastage and CM2M devices queue length; to this aim, the proposed DACT protocol has been implemented with different alternatives. Among them, an adaptive approach allows to optimise the system performance by increasing the overall throughput while keeping under control the system delay and the resource wastage. Copyright © 2015 John Wiley & Sons, Ltd.
7 citations