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MIMO Technologies in 3GPP LTE and LTE-Advanced  [cached]
Lee Juho,Han Jin-Kyu,Zhang Jianzhong(Charlie)
EURASIP Journal on Wireless Communications and Networking , 2009,
Abstract: 3rd Generation Partnership Project (3GPP) has recently completed the specification of the Long Term Evolution (LTE) standard. Majority of the world's operators and vendors are already committed to LTE deployments and developments, making LTE the market leader in the upcoming evolution to 4G wireless communication systems. Multiple input multiple output (MIMO) technologies introduced in LTE such as spatial multiplexing, transmit diversity, and beamforming are key components for providing higher peak rate at a better system efficiency, which are essential for supporting future broadband data service over wireless links. Further extension of LTE MIMO technologies is being studied under the 3GPP study item "LTE-Advanced" to meet the requirement of IMT-Advanced set by International Telecommunication Union Radiocommunication Sector (ITU-R). In this paper, we introduce various MIMO technologies employed in LTE and provide a brief overview on the MIMO technologies currently discussed in the LTE-Advanced forum.
MIMO Technologies in 3GPP LTE and LTE-Advanced  [cached]
Juho Lee,Jin-Kyu Han,Jianzhong (Charlie) Zhang
EURASIP Journal on Wireless Communications and Networking , 2009, DOI: 10.1155/2009/302092
Abstract: 3rd Generation Partnership Project (3GPP) has recently completed the specification of the Long Term Evolution (LTE) standard. Majority of the world's operators and vendors are already committed to LTE deployments and developments, making LTE the market leader in the upcoming evolution to 4G wireless communication systems. Multiple input multiple output (MIMO) technologies introduced in LTE such as spatial multiplexing, transmit diversity, and beamforming are key components for providing higher peak rate at a better system efficiency, which are essential for supporting future broadband data service over wireless links. Further extension of LTE MIMO technologies is being studied under the 3GPP study item “LTE-Advanced” to meet the requirement of IMT-Advanced set by International Telecommunication Union Radiocommunication Sector (ITU-R). In this paper, we introduce various MIMO technologies employed in LTE and provide a brief overview on the MIMO technologies currently discussed in the LTE-Advanced forum.
The Evolution of LTE towards IMT-Advanced  [cached]
Stefan Parkvall,David Astely
Journal of Communications , 2009, DOI: 10.4304/jcm.4.3.146-154
Abstract: This paper provides a high-level overview of some technology components currently considered for the evolution of LTE, referred to as LTE-Advanced. First, a brief overview of LTE and some of its technologies are given and then the IMT-Advanced requirements are discussed. One of the targets with the evolution of LTE is to reach or seven surpass these requirements. The technology components considered for LTE-Advanced include extended spectrum flexibility to support up to 100MHz bandwidth, enhanced multi-antenna solutions with up to eight layer transmission in the downlink and up to four layer transmission in the uplink, coordinated multi-point transmission/reception, and the use of advanced repeaters/relaying.
SOPHISTICATION TECHNIQUES OF FOURTH GENERATIONS IN NEOTERIC MOBILE LTE AND LTE-ADVANCED
A. Z. Yonis,M. F. L. Abdullah
International Journal of Cyber-Security and Digital Forensics , 2012,
Abstract: Long Term Evolution (LTE-Advanced) is a preliminary mobile communication standard formally submitted as a candidate for 4G systems to the ITU-T. LTE-A is being standardized by the 3rd Generation Partnership Project (3GPP) as a major enhancement of the 3GPP Long Term Evolution (LTE-Release 8) standard, which proved to be sufficient to satisfy marketa€ s demand. The 3GPP group has been working on different aspects to improve LTE performance, where the purpose of the framework provided by LTE-Advanced, includes higher order MIMO, carrier aggregation (carriers with multiple components), peak data rate, and mobility. This paper presents a study on LTE evolution toward LTE-Advanced in terms of LTE enabling technologies (Orthogonal Frequency Division Multiplexing (OFDM) and Multiple-Input Multiple-Output (MIMO)), and also focuses on LTE- Advanced technologies MIMO enhancements for LTE-Advanced, Coordinated Multi Point transmission (CoMP).
Dynamic Relaying in 3GPP LTE-Advanced Networks  [cached]
Teyeb Oumer,Van Phan Vinh,Raaf Bernhard,Redana Simone
EURASIP Journal on Wireless Communications and Networking , 2009,
Abstract: Relaying is one of the proposed technologies for LTE-Advanced networks. In order to enable a flexible and reliable relaying support, the currently adopted architectural structure of LTE networks has to be modified. In this paper, we extend the LTE architecture to enable dynamic relaying, while maintaining backward compatibility with LTE Release 8 user equipments, and without limiting the flexibility and reliability expected from relaying. With dynamic relaying, relays can be associated with base stations on a need basis rather than in a fixed manner which is based only on initial radio planning. Proposals are also given on how to further improve a relay enhanced LTE network by enabling multiple interfaces between the relay nodes and their controlling base stations, which can possibly be based on technologies different from LTE, so that load balancing can be realized. This load balancing can be either between different base stations or even between different networks.
Dynamic Relaying in 3GPP LTE-Advanced Networks  [cached]
Oumer Teyeb,Vinh Van Phan,Bernhard Raaf,Simone Redana
EURASIP Journal on Wireless Communications and Networking , 2009, DOI: 10.1155/2009/731317
Abstract: Relaying is one of the proposed technologies for LTE-Advanced networks. In order to enable a flexible and reliable relaying support, the currently adopted architectural structure of LTE networks has to be modified. In this paper, we extend the LTE architecture to enable dynamic relaying, while maintaining backward compatibility with LTE Release 8 user equipments, and without limiting the flexibility and reliability expected from relaying. With dynamic relaying, relays can be associated with base stations on a need basis rather than in a fixed manner which is based only on initial radio planning. Proposals are also given on how to further improve a relay enhanced LTE network by enabling multiple interfaces between the relay nodes and their controlling base stations, which can possibly be based on technologies different from LTE, so that load balancing can be realized. This load balancing can be either between different base stations or even between different networks.
Evolution of the 4th Generation Mobile Communication Network: LTE-Advanced  [PDF]
Khondokar Fida Hasan,Md. Morshedul Islam
International Journal of Computer Technology and Applications , 2011,
Abstract: Mobile communication network experiences dramatic advances and changes over the last two decades. With the growing demand, the development of the design and optimization of radio access technologies and a further evolution of the existing system, the Third Generation Partnership Project (3GPP) had laid down the foundation of the future Long Term Evolution (LTE) advanced standards as the 3GPP candidates for 4G. This research work provides a high-level technical overview of LTE Release-10, also known as LTE-Advanced. This article covers a quick overview of LTE-Advanced technology and its predecessor technologies. It also describes all the technological enhancements introduced to LTE-Advanced. Thus, this paper can steer all those learners and researchers who desire to have a foundation for further research and study in the field of next generation mobile communication system
TAKING THE JOURNEY FROM LTE TO LTE-ADVANCED
Arshed Oudah,Tharek Abd Rahman
International Journal of Advances in Engineering and Technology , 2011,
Abstract: This paper addresses the main features of the transition from the Long Term Evolution standard (LTE) to its successor Long Term Evolution-Advanced (LTE-A). The specifications of the new release have taken several years and included thousands of temporary documents. The output, thus, would be tens of volumes of details. Turning this number of volumes into a single manuscript is a very useful resource for many researchers. One paper of this length must therefore choose its contents wisely if it has to do more than just scratching the surface of such a complex standard.
Editorial: Advanced learning technologies  [cached]
Stephen J.H. Yang,Gang-Shan Fu,Yu-Ju Lan,Jeff J.S. Huang
Knowledge Management & E-Learning : an International Journal , 2012,
Abstract: Recent rapid development of advanced information technology brings high expectations of its potential to improvement and innovations in learning. This special issue is devoted to using some of the emerging technologies issues related to the topic of education and knowledge sharing, involving several cutting edge research outcomes from recent advancement of learning technologies. Advanced learning technologies are the composition of various related technologies and concepts such as mobile technologies and social media towards learner centered learning. This editorial note provides an overview of relevant issues discussed in this special issue.
Interference Coordination for E-MBMS Transmissions in LTE-Advanced  [PDF]
Alberto A. Lopes,José Seguro,Paulo Gomes,Nuno Souto,Américo Correia
International Journal of Digital Multimedia Broadcasting , 2010, DOI: 10.1155/2010/689705
Abstract: Interference coordination methods for Evolved-Multimedia Broadcast/Multicast Service (E-MBMS) in Long-Term Evolution Advanced (LTE-A) are presented. In addition, we consider signal space diversity based on Rotation Matrices (RM) known to provide good performance gains over uncorrelated Rayleigh fading channels. OFDM/OFDMA systems can make the use of RM very attractive both for single and multiple antenna transmissions. In this paper, OFDM/OFDMA signals based on LTE parameters are combined with RM, MIMO, Turbo, or LDPC codes. We have considered different types of receivers, namely, we used an MMSE (Minimum Mean Squared Error) equalizer and a Maximum Likelihood Soft Output criterion (MLSO). Frequency, signal, and space diversity gains are evaluated for different spatial channel models (SCM) based on ITU multipath propagation channels. Different adaptive frequency reuse and schedulers are considered to evaluate the E-MBMS spectral efficiency at the cell borders. 1. Introduction Long-Term Evolution Advanced (LTE-A) considers a series of new transmission technologies, such as, coordinated multipoint transmission and reception, relay and carrier aggregation. The objective is to meet the high technical and services requirements of IMT-Advanced standards, such as, peak data rate up to 100?Mbps in high-speed mobility environment and 1?Gbps in a pedestrian environment. The bandwidth varies from 20?MHz to 100?MHz. The LTE standard is the basic standard that paves the way for the future 4th Generation (4G) wireless networks. LTE addresses the emerging trend for the mass provision of rich multimedia services, such as Mobile TV, in a more powerful and spectral efficient way than its predecessors. The Evolved-Multimedia Broadcast/Multicast Service (E-MBMS) framework is envisaged to play an essential role for the LTE-A proliferation in mobile environments. E-MBMS constitutes the evolutionary successor of MBMS, which was introduced in the Release 6 of Universal Mobile Telecommunication System (UMTS). With E-MBMS, the mass provision of multimedia applications to mobile users will be a reality. With the introduction of Multimedia Broadcast and Multicast Service (MBMS) [1], cellular broadcast will become an essential delivery option of Mobile TV. TV channels can then be broadcasted to an unlimited number of users. On the other hand, the number of channels is limited due to the available broadcast capacity. As MBMS indicates, there are two types of service mode: the broadcast mode and the multicast mode. Each mode has different characteristics in terms of complexity and
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