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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07 Apr 2013
TL;DR: This paper defines and evaluates models for analysis of performance of mobile networks architectures defined by 3GPP and implements the Discrete-Event System Specification (DEVS) formalism to model the mobile networks and implement the framework.
Abstract: The fourth generation (4G) of mobile telecommunication technology provides ultra-band internet access for mobile devices such as smartphones, tablets, and laptops One of the challenges in the Long Term Evolution (LTE) 4G networks is the low data rate for cell-edge users as well as coverage gaps In this paper, we define and evaluate models for analysis of performance of mobile networks architectures defined by 3GPP We used the Discrete-Event System Specification (DEVS) formalism to model the mobile networks and implement the framework The proposed model implements the deployment layout of the Base Station (BS) cellular antennas, and it manages the distribution and movement of the User Equipment (UE) devices The model calculates the Propagation for each BS, as well as the path-loss in the links between BSs and the UEs in the range It also computes the power received by the BS and the UE in each link These results will be used in the design of models for Coordinated Multipoint approach in delivering faster data
3 citations
Cites background or methods from "3G Evolution : HSPA and LTE for Mob..."
...One of the challenges in the Long Term Evolution (LTE) 4G networks is the low data rate for cell-edge users as well as coverage gaps....
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...These results will be used in the design of models for Coordinated Multipoint approach in delivering faster data....
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01 Aug 2014
TL;DR: It is found that the computation complex can be decreased by deducing the semi-blind algorithm formulas further, and the times of complex multiplication after derivation is decreased to 2.61% to 8.67% than the non-simplified.
Abstract: Physical uplink control channel (PUCCH) in Long Term Evolution (LTE) consists of two basic transmission formats: format 1/la/lb and format 2/2a/2b. The semi-blind algorithm can improve channel estimation accuracy by using both data energy and RS energy for PUCCH format 2 in low-speed environment with a cost of higher computation complexity. This paper analyzes the semi-blind algorithm, and then we simplify the equations by further derivation. We find that the computation complex can be decreased by deducing the semi-blind algorithm formulas further. The times of complex multiplication after derivation is decreased to 2.61% to 8.67% than the non-simplified.
3 citations
TL;DR: This work generalizes existing analytical results on signal-to-interference-plus-noise-ratio distribution and outage probability under arbitrary number of unequal power interferers and includes interference rank as a parameter, allowing for a thorough study of its impact.
Abstract: Spatial multiplexing is one of the multi-antenna techniques employed by current generation wireless systems. Based on existing research, spatial multiplexing is known to be susceptible to interference. However, it is not well known what the effect of spatial multiplexing on other transmissions is, i.e., how does user performance depend on whether a neighboring cochannel interferer applies a single (spatial) stream or a multi stream transmission. This work attempts to alleviate this shortcoming by analyzing the impact of interference rank (number of spatial streams) on a beamforming and orthogonal space-time block coded user transmission. We generalize existing analytical results on signal-to-interference-plus-noise-ratio distribution and outage probability under arbitrary number of unequal power interferers. Our results are in close form and include interference rank as a parameter, allowing for a thorough study of its impact. Analysis shows that higher rank interference causes lower outage probability, and can support higher outage threshold especially in the case of beamforming.
3 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...This is an ideal version of the codebook approach present in LTE....
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...Modern cellular systems, such as 3GPP Long Term Evolution (LTE) [2], extensively rely on multiple-input and multiple-output (MIMO) techniques....
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...Majority of LTE BSs are equipped with the X2 interface to exchange control messages with other BSs and thus could take advantage of it....
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01 Jan 2014
TL;DR: This dissertation aims to provide a history of web exceptionalism from 1989 to 2002, a period chosen in order to explore its roots as well as specific cases up to and including the year in which descriptions of “Web 2.0” began to circulate.
3 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...To further enhance mobile communication, the 3 Generation Partnership Project (3GPP) has released the long-term evolution (LTE) or affectionately called 4G (Dahlman, 2008)which has the capacity to support a data transmission rate of 300Mbps, with network delay of less than 5ms, a considerable improvement in spectrum efficiency compared to previous mobile communication systems (Astély et al....
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...…enhance mobile communication, the 3rd Generation Partnership Project (3GPP) has released the long-term evolution (LTE) or affectionately called 4G (Dahlman, 2008)which has the capacity to support a data transmission rate of 300Mbps, with network delay of less than 5ms, a considerable improvement…...
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TL;DR: The problem of resource allocation in a cognitive long-term evolution (LTE) network, where the available bandwidth resources are shared among the primary (PUs) and secondary (unlicensed) users (SUs) is investigated, is investigated and algorithms show superior performance when compared with other relevant techniques.
Abstract: We investigate the problem of resource allocation in a cognitive long-term evolution (LTE) network, where the available bandwidth resources are shared among the primary (licensed) users (PUs) and secondary (unlicensed) users (SUs). Under such spectrum sharing conditions, the transmission of the SUs should have minimal impact on quality of service (QoS) and operating conditions of the PUs. To achieve this goal, we propose to assign the network resources based on the buffer sizes of the PUs and SUs in the uplink (UL) and downlink (DL) directions. To ensure that the QoS requirements of the PUs are satisfied, we enforce some upper bound on the size of their buffers considering two network usage scenarios. In the first scenario, PUs pay full price for accessing the spectrum and get full QoS protection; the SUs access the network for free and are served on a best-effort basis. In the second scenario, PUs pay less in exchange for sharing the bandwidth and get the reduced QoS guarantees; SUs pay some price for their access without any QoS guarantees. Performance of the algorithms proposed in the paper is evaluated using simulations in OPNET environment. The algorithms show superior performance when compared with other relevant techniques.
3 citations