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LTE Advanced

About: LTE Advanced is a research topic. Over the lifetime, 4055 publications have been published within this topic receiving 74262 citations. The topic is also known as: Long-Term Evolution Advanced & LTE-A.


Papers
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Proceedings ArticleDOI
07 Mar 2012
TL;DR: This paper investigates the throughput and energy benefits of JT-CoMP transmission (over the conventional single-point transmission) in Long-Term Evolution (LTE) and LTE-Advanced homogeneous and heterogeneous network scenarios and proposes a link-level modeling framework based on Finite State Markov Chain models for physical layer transport block transmission over the LTE radio access network.
Abstract: Coordinated Multi-Point (CoMP) transmission by neighboring base stations to mobile users is recently considered for both the cell-edge and the overall system throughput enhancements in next-generation cellular systems. As one of the most promising CoMP techniques, Joint Transmission (JT)-CoMP achieves higher spectral efficiency by exploiting cooperative diversity gains and inter-cell interference mitigation by coordinated transmission of the same information from multiple transmitting points. In this paper, we investigate the throughput and energy benefits of JT-CoMP transmission (over the conventional single-point transmission) in Long-Term Evolution (LTE) and LTE-Advanced homogeneous and heterogeneous network scenarios. For realistic rate/energy efficiency analysis, we propose a link-level modeling framework based on Finite State Markov Chain models for physical layer transport block transmission over the LTE radio access network. Results obtained show significant rate gains and energy savings using JT-CoMP (compared to the single-point transmission) especially for users in the cell-edge area.

23 citations

Proceedings ArticleDOI
20 Aug 2013
TL;DR: An algorithm combining BS sleeping with dynamic clustering (SMDC) to maximize EE is proposed and the simulation results show that the proposed method can greatly improve the EE of the whole system.
Abstract: Due to the increasing number of wireless devices, power consumption and energy efficiency (EE) have become important performance indicators of the cellular network. It is an effective method to reduce energy consumption by switching off some underutilized base stations (BSs). The user equipments (UEs) left by the sleeping BS can be serviced by the nearby active BSs. And through Coordinated Multi-Point technology (CoMP), it does not need to increase transmit power of the active BSs to ensure the coverage of the network. The method combining sleep mode with static clustering is only applied to the scenario during off-peak time and uniform user distributed. Static clustering is fixed once it formed, which does not change with the movement of the user's position. In order to solve this problem, we propose an algorithm combining BS sleeping with dynamic clustering (SMDC) to maximize EE. The simulation results show that the proposed method can greatly improve the EE of the whole system. Besides, we use system level simulation to estimate the performance of this method.

23 citations

Proceedings ArticleDOI
18 Apr 2010
TL;DR: Different MU (Multi User) CoMP schemes based on two different coordinated topologies and transparent/non-transparent MU(Multi User)-MIMO achieve different gains in average sector throughput and 5% edge-user throughput as compared to the performance of conventional pre-coding scheme.
Abstract: As one of the key technologies in TD-LTE-Advanced downlink system, MIMO-OFDMA (Multi-Input and Multi-Output Orthogonal Frequency Division Multiplexing Access) achieves high system throughput by using multiple antennas at both the transmitter and receiver while eliminating intra-cell interference by utilizing closely-spaced orthogonal sub-carriers. Nonetheless, the inter-cell interference among several UEs remains unsolved. Therefore CoMP(Coordinated Muti-Point transmission/reception) is introduced to solve this problem. This paper studies different MU(Multi User) CoMP schemes based on two different coordinated topologies and transparent/non-transparent MU(Multi User)-MIMO. The simulation results shows the CoMP schemes achieve different gains in average sector throughput and 5% edge-user throughput as compared to the performance of conventional pre-coding scheme.

23 citations

Proceedings Article
16 Apr 2013
TL;DR: It is shown that the DRoF is an enabler of several LTE-Advanced features that need high information exchanges and coordination between base stations and it can also reduce the network deployment costs and increase the energy saving.
Abstract: This paper investigates the opportunities of using the Digital-RoF for LTE-Advanced and beyond systems. It shows that the DRoF is an enabler of several LTE-Advanced features that need high information exchanges and coordination between base stations. It can also reduce the network deployment costs and increase the energy saving. However, this implies several challenges such as the existence of standards able to define connections between different base station components with the fiber. Besides, the use of carrier aggregation and the enhanced MIMO increases the bit rate supported by the D-RoF which could be critical for the fiber availability.

23 citations

Proceedings ArticleDOI
29 Sep 2014
TL;DR: A theoretical framework to systematically explore the attack space which consists of communication services attacked, planes of attack, and network components under attack is developed and carried out extensive simulations to evaluate the impact of some representative attacks on LTE network performance.
Abstract: Because of ever-increasing performance and capacity gains, the popularity of LTE as a 4G technology has skyrocketed. Unfortunately, cyber adversaries may launch attacks against the LTE network. In this paper, we develop a theoretical framework to systematically explore the attack space which consists of three dimensions: communication services attacked, planes of attack, and network components under attack. Based on the developed framework, we carried out extensive simulations to evaluate the impact of some representative attacks on LTE network performance. Our developed framework and simulation models enables a foundation for advancing the understanding of threats on the LTE network and assists in developing countermeasures to secure LTE networks.

23 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202316
202242
202156
202082
2019135
2018192