LTE-Advanced employs Orthogonal Frequency-Division Multiplexing (OFDM), Carrier Aggregation (CA), Multi Input Multi Output (MIMO), Co-ordinated Multi-Point Transmission (CoMP) and Relay Station state of the art techniques to significantly enhance transmission performance and extend BS service coverage. On the other hand, Femtocell, specified in 3GPP Rel-8, has the advantages of low power consumption, zero-touch PnP, low […]
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Efficient downlink scheduling with discontinuous reception (DRX) mechanism in LTE network
Long Term Evolution (LTE) is being widely deployed to support real-time applications, such as voice over IP and video games. These power consuming applications create new challenges for resource allocation. Therefore, providing efficient resource allocation as well as extending user equipment’s (UE) battery lifetime are two important goals in LTE network. Maximum Largest Weighted Delay First (M-LWDF) […]
Read moreThe communication delay, which has great impact on vehicle-to-infrastructure (V2I) networks, faces a large challenge on account of complex network topology. In this paper, a novel architecture that integrates LTE networks with IEEE 802.11 based Vehicle Ad Hoc Networks (VANETs) is proposed, due to their high data transmission rates and wide coverage area, respectively. The proposed scheme […]
Read moreIn this paper, we discuss several Coordinated Multi-Point (CoMP) schemes proposed for LTE- Advanced systems. We investigate their benefits in a multi-antenna beamforming system where multiple cells may share their resources and jointly coordinate their transmissions to improve the performance at cell edge and the overall system capacity. We evaluate the system performance by combining flow-level […]
Read moreReliable and repeatable video quality assessment is essential for performance analysis of wireless multimedia applications in the third generation (3G) Long Term Evolution (LTE) network. In this article we report on a database containing subjective assessment scores and the corresponding Quality-of-Service parameters of 70 video test sequences encoded with H.264, which are corrupted when transmitted […]
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On demand SINR based scheduling algorithm (ODSSA) for mobile uplink communication in LTE networks
Long Term Evolution (LTE) a Third Generation Partnership Project (3GPP) is developed for multimedia applications on mobile user equipment with very high data rates of the order 75/300 Mbps and low latency of 10msec. The high data rates are achieved by using SC-FDMA radio access mechanism for uplink communication and OFDM access mechanism for downlink. […]
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Second-Order Cyclostationarity-Based Detection of LTE SC-FDMA Signals for Cognitive Radio Systems
In this paper, we investigate the detection of long-term evolution (LTE) single carrier-frequency division multiple access (SC-FDMA) signals, with application to cognitive radio systems. We explore the second-order cyclostationarity of the LTE SC-FDMA signals and apply results obtained for the cyclic autocorrelation function to signal detection. The proposed detection algorithm provides a very good performance under various […]
Read moreIn this paper, we address dynamic spectrum access for Primary Operators (POs) for LTE-Advanced systems. We propose a dynamic spectrum access framework that exploits the capabilities of carrier aggregation to efficiently utilize the unutilized spectrum which varies with time and space when static spectrum access policies are adopted. A spectrum owner (SO) adopts an auction scheme […]
Read moreThis letter proposes a solution to the multicast subgroup formation problem that aims to maximize the aggregate data rate in Long Term Evolution (LTE) and beyond systems. We analytically demonstrate that, by reducing the solution search space and releasing some constraints, the problem can be solved in a closed form, and a very small number […]
Read moreAmong the solutions for broadband wireless access (BWA) provisioning, Long Term Evolution (LTE) represents one the most promising technologies. In order to effectively support the tremendous growth of mobile broadband services required by the users of the fifth generation (5G) systems, LTE is claimed to efficiently manage the contemporary presence of traditional unicast and value-added multicast services. […]
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