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Journal Article•DOI•

LTE-advanced: next-generation wireless broadband technology [Invited Paper]

Amitava Ghosh1, Rapeepat Ratasuk1, Bishwarup Mondal1, Nitin Mangalvedhe1, Timothy A. Thomas1 •
Motorola1
01 Jun 2010-IEEE Wireless Communications (IEEE Press)-Vol. 17, Iss: 3, pp 10-22
TL;DR: An overview of the techniques being considered for LTE Release 10 (aka LTEAdvanced) is discussed, which includes bandwidth extension via carrier aggregation to support deployment bandwidths up to 100 MHz, downlink spatial multiplexing including single-cell multi-user multiple-input multiple-output transmission and coordinated multi point transmission, and heterogeneous networks with emphasis on Type 1 and Type 2 relays.
Abstract: LTE Release 8 is one of the primary broadband technologies based on OFDM, which is currently being commercialized. LTE Release 8, which is mainly deployed in a macro/microcell layout, provides improved system capacity and coverage, high peak data rates, low latency, reduced operating costs, multi-antenna support, flexible bandwidth operation and seamless integration with existing systems. LTE-Advanced (also known as LTE Release 10) significantly enhances the existing LTE Release 8 and supports much higher peak rates, higher throughput and coverage, and lower latencies, resulting in a better user experience. Additionally, LTE Release 10 will support heterogeneous deployments where low-power nodes comprising picocells, femtocells, relays, remote radio heads, and so on are placed in a macrocell layout. The LTE-Advanced features enable one to meet or exceed IMT-Advanced requirements. It may also be noted that LTE Release 9 provides some minor enhancement to LTE Release 8 with respect to the air interface, and includes features like dual-layer beamforming and time-difference- of-arrival-based location techniques. In this article an overview of the techniques being considered for LTE Release 10 (aka LTEAdvanced) is discussed. This includes bandwidth extension via carrier aggregation to support deployment bandwidths up to 100 MHz, downlink spatial multiplexing including single-cell multi-user multiple-input multiple-output transmission and coordinated multi point transmission, uplink spatial multiplexing including extension to four-layer MIMO, and heterogeneous networks with emphasis on Type 1 and Type 2 relays. Finally, the performance of LTEAdvanced using IMT-A scenarios is presented and compared against IMT-A targets for full buffer and bursty traffic model.
Citations
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Proceedings Article•DOI•
Exploring sustainability of the deployment of wireless broadband in Malaysia rural areas: Comprehensive insights

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Kok-Lim Alvin Yau1, Corinne Jacqueline Perera1, Heng Tze David Chieng2, Kae Hsiang Kwong2, Alvin Ting2 •
Sunway University1, MIMOS2
01 Dec 2011
TL;DR: This paper considers WBN as a distributed network comprised of wireless hosts that can communicate with each other in the absence of fixed network infrastructure such as a base station, to understand the challenges brought about by the future deployment of WBN tailor-made to rural Malaysia.
Abstract: The Malaysian government has outlined the expansion and development of communication infrastructure as one of the twelve National Key Economic Areas of the Economic Transformation Program (ETP). In line with this effort, Wireless Broadband Network (WBN) has been proposed as the enabling technology to provide wireless broadband access to the rural population. This paper considers WBN as a distributed network comprised of wireless hosts that can communicate with each other in the absence of fixed network infrastructure such as a base station. The deployment of WBN in Malaysia rural areas has complex effects across various domains including social, technological, economical, environmental, and political domains. We expect several parties are involved in the deployment of WBN, including the government (or policy makers), rural communities, service providers, as well as standardization. Due to the complexity of the entire deployment process, this paper provides initial investigation, in a holistic manner, through the technology forecasting approach in order to understand the challenges brought about by the future deployment of WBN tailor-made to rural Malaysia. The outcome of this investigation explores new research direction, and this is important for making future investment and strategic decisions. To the best of our knowledge, this is the first attempt in the literature to date to perform technology forecasting on wireless broadband access in rural areas in order to achieve sustainable deployment. This paper aims to discover new research directions and areas in order to expedite the ETP program implementation.

2 citations

Cites background from "LTE-advanced: next-generation wirel..."

  • ...Choice of communication technologies are IEEE 802.11 (WiFi) [15], IEEE 802.16 (WiMAX) [16], IEEE 802.22 (cognitive radio) [17], Very Small Aperture Terminal (VSAT) [18], Long Term Evolution (LTE) [19] or cellular networks [20], and wire line [21]....

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  • ...22 (cognitive radio) [17], Very Small Aperture Terminal (VSAT) [18], Long Term Evolution (LTE) [19] or cellular networks [20], and wire line [21]....

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Journal Article•DOI•
An Opportunistic Subchannel Allocation Scheme in Relay-based Marine Communication Networks

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Deokhui Lee1, Seong Ro Lee1, Jaewoo So2•
Sogang University1, Mokpo National University2
31 Jul 2014-The Journal of Korean Institute of Communications and Information Sciences
TL;DR: 이터를 선박에게 즉시 전달 해준다, 홉 네트워크(기지국과 릴레이), 효율적으로 �’�
Abstract: 본 논문에서는 릴레이 기반의 선박 통신 네트워크에서 데이터 전송률을 높이기 위한 기회주의적 서브채널 할당 기법을 제안한다. 릴레이 시스템을 기반으로 하는 기존 연구에서, 릴레이는 매 프레임마다 기지국으로부터 수신 받은 데이터를 선박에게 즉시 전달 해준다. 이때, 이중 홉 네트워크(기지국과 릴레이, 릴레이와 선박 간 링크)에서 전송 가능한 최대 수율은 두 링크의 채널 상태에 의해 결정된다. 만약, 채널 상태에 따른 두 링크가 가지는 채널 용량의 차이가 크다면 자원이 낭비되는 상황이 발생하게 된다. 이러한 문제점은 시스템의 성능을 저하시키며, 제한된 무선 자원을 효율적으로 활용하지 못하는 문제점이 발생하게 된다. 따라서 본 논문에서는 두 링크 사이에서 발생하는 자원의 낭비를 최소화 시킴과 동시에 자원을 효율적으로 할당 할 수 있는 기법을 제안한다. 또한 제안하는 기법의 계산 복잡도를 줄이기 위해서 차선의 기법을 제안한다. 시뮬레이션 결과를 통해서, 제안하는 기법은 기존 연구 대비 계산의 복잡도는 증가하지만 시스템의 데이터 전송률 성능이 최대 14.0% 향상됨을 확인 할 수 있다.

2 citations

Cites background or methods from "LTE-advanced: next-generation wirel..."

  • ...Many researchers have endeavored to develop efficient subchannel allocation schemes to improve the system performance in relay-based OFDMA networks ([1,5-9])....

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  • ...The authors of [6] propose a subchannel allocation scheme, where the transmission time in each link is adaptively adjusted according to the channel state in an OFDMA cellular system with fixed RSs....

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  • ...However, although [1] and [5-9] proposed various subchannel allocation schemes to maximize the system performance, the conventional schemes do not exploit the frequency diversity in a two-hop relay link....

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Proceedings Article•DOI•
A Critical Study on Campus Energy Monitoring System and Role of IoT

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Mopuri Deepika1, Merugu Kavitha1, N. S. Kalyan Chakravarthy1, J. Srinivas Rao1, D. Mohan Reddy, B. Mouli Chandra1 •
QIS College of Engineering and Technology1
21 Jan 2021
TL;DR: In this article, a typical case study on energy monitoring system in a campus where hybrid energy is being used i.e., both solar and grid power is also included in this paper.
Abstract: This paper provides a typical case study on energy monitoring system in a campus where hybrid energy is being used i.e., both solar and grid power. A critical review on previously used energy monitoring systems is also included in this paper. As the current trend is going with the smartness which includes smart-cities, smart buildings, smart phones, etc., same thing can be extended in terms of energy monitoring. This can be done by using the most widely using IoT technology. A proper monitoring of energy delivered, energy consumed and real time updates on the power analysis may assists to estimate the cost of electricity consumed. Also, the ways to reduce the electricity bill in efficient manner. A campus in the near-by location is selected, power consumption analysis is performed and some significant outcomes are reported. The renewable (solar) energy maintenance is another important point to be noticed. Having real time updates on the solar energy generation and distribution may help the users to maintain cost-effective environment.

2 citations

Journal Article•DOI•
Optimal Threshold of LTE-Femtocell Network Based Bayes-Nash Equilibrium Theory

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Hao Chen, Kan Liu, Tunhua Wu
31 Dec 2015
TL;DR: A self-optimized power control scheme for LTE-femtocell networks, in which the transmitted power of a femtocell base station is adjusted based on the optimal SINR threshold, to enable robust communication against cross-tier interference.

2 citations

Cites background from "LTE-advanced: next-generation wirel..."

  • ...In order to improve the LTE network throughputs and spectrum efficiency, LTE-femtocell two-tired networks [2-5] have been studied....

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Journal Article•DOI•
On the applicability of steerable beams in LTE-Advanced networks with high user mobility

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C. Papathanasiou1, Nikos Dimitriou2, Leandros Tassiulas1•
University of Thessaly1, National and Kapodistrian University of Athens2
27 Jul 2012-Eurasip Journal on Wireless Communications and Networking
TL;DR: By applying coordinated transmission of steerable beams at neighboring eNodeBs, the coverage area and total throughput may significantly be enhanced, compared to the current LTE standard where inter-cell interference coordination technique is adopted for low-speed UEs.
Abstract: This article deals with the problem of applying scanning narrow beams to long-term evolution (LTE)-advanced networks that include in their coverage areas fast moving mobiles. The system scenario is assumed to include eNodeBs that can form multiple beams which can steer (rotate) their respective coverage areas. Additionally, the user downlink transmissions are supposed to be dynamically scheduled based on signal-to-noise plus interference ratio reports for physical resource blocks. The mobile user equipments (UEs) have multiple antenna elements which allow maximal ratio combining of the received signals. By applying coordinated transmission of steerable beams at neighboring eNodeBs, we could mitigate inter-cell interference in a multi-cell interference deployment. The coverage area and total throughput may significantly be enhanced, compared to the current LTE standard where inter-cell interference coordination technique is adopted for low-speed UEs. Furthermore, the proposed schemes involve low-complexity hardware implementation and low power consumption.

2 citations

Cites methods from "LTE-advanced: next-generation wirel..."

  • ...Our contribution is that only this article studies the performance of applying scanning narrow beams in the LTE-Advanced system for high-speed users with stringent QoS requirements and inter-cell interference....

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  • ...Keywords: High speed users, LTE-Advanced, Limited feedback, Multiuser diversity, Coordinated multi-point transmission, Rotated beams Introduction Long-term evolution (LTE), introduced in 3rd Generation Partnership Project’s (3GPP) Release 8, represents a significant change to the existing 3G radio access networks [1,2]....

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  • ..., beamforming with four antenna at the transmitter and receiver side, Orthogonal frequency-division multiplexing access which is the core of the LTE downlink transmission, adaptive modulation and coding (AMC) scheme, a real-time scheduler and cooperative multipoint transmission (CoMP), an extensively discussed technique within the context of LTE-Advanced [3]....

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  • ...Commons Attribution License (http://creativeco reproduction in any medium, provided the orig study, we enable advanced antenna techniques, e.g., beamforming with four antenna at the transmitter and receiver side, Orthogonal frequency-division multiplexing access which is the core of the LTE downlink transmission, adaptive modulation and coding (AMC) scheme, a real-time scheduler and cooperative multipoint transmission (CoMP), an extensively discussed technique within the context of LTE-Advanced [3]....

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  • ...LTE-Advanced which is an evolution of LTE introduces beamforming and CoMP technologies....

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References
More filters
Proceedings Article•DOI•
Overview of UMTS Air-Interface Evolution

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Brian K. Classon1, Kevin L. Baum1, Vijay Nangia1, R. Love, Yakun Sun, R. Nory, K. Stewart, Arunabha Ghosh, Rapeepat Ratasuk, Weimin Xiao, Jun Tan •
Motorola1
01 Sep 2006
TL;DR: A preliminary look at the air interface for Evolved UTRA (E-UTRA) and associated key technologies required to reach its design objectives are provided.
Abstract: With the emergence of packet-based wireless broadband systems such as 802.16e, it is evident that a comprehensive evolution of the universal mobile telecommunications system specifications is required to remain competitive. As a result, work has begun on long term evolution (LTE) of the UMTS terrestrial radio access and radio access network aimed for commercial deployment in 2010. Goals for the evolved system include support for improved system capacity and coverage, high peak data rates, low latency, reduced operating costs, multi-antenna support, flexible bandwidth operations and seamless integration with existing systems. To reach these goals, a new design for the air interface is envisioned. This paper provides a preliminary look at the air interface for Evolved UTRA (E-UTRA) and associated key technologies required to reach its design objectives. Initial E-UTRA system performance results show a 2 to 3x improvement over a reference Rel-6 UMTS system configuration [1, 2] for both uplink and downlink.

30 citations

Proceedings Article•DOI•
On UMTS-LTE Physical Uplink Shared and Control Channels

[...]

A.D. Dabbagh1, Rapeepat Ratasuk1, A. Ghosh•
Motorola1
24 Oct 2008
TL;DR: The proposed channel estimation technique is shown to have significant gains in performance compared to other well known channel estimation techniques such as the maximum-likelihood (ML) and the inverse fast Fourier transform (IFFT) channel estimation methods.
Abstract: The performance of the uplink physical channel of the 3GPP LTE system is considered in this paper. Assuming a single user spatial division multiple access transmission scheme, where users' signals are transmitted over different subcarriers, a low complexity channel estimation technique is proposed for the physical uplink shared channel (PUSCH). The proposed channel estimation technique is shown to have significant gains in performance compared to other well known channel estimation techniques such as the maximum-likelihood (ML) and the inverse fast Fourier transform (IFFT) channel estimation methods [5]. Simulation results for different channel models and modulation and coding schemes (MCS) using incremental redundancy (IR) based hybrid automatic repeat request (HARQ) operation are also shown. Finally, a robust detection scheme is proposed for the physical uplink control channel (PUCCH) and simulation results are summarized.

10 citations

"LTE-advanced: next-generation wirel..." refers methods in this paper

  • ...The DFT precoding operation is performed to reduce the cubic metric (CM) of the signal, leading to higher maximum transmit power [2]....

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Trending Questions (1)
What is the difference between LTE Home Internet and FIOS?

LTE-Advanced (also known as LTE Release 10) significantly enhances the existing LTE Release 8 and supports much higher peak rates, higher throughput and coverage, and lower latencies, resulting in a better user experience.

See answers from 10 other papers