Topic
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.
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Papers
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TL;DR: A stochastic geometry based framework to analyze the coverage probability and average data rate of a three-hop M2M network deployed along with User Equipments (UEs) and extensive simulations to study the system performance show that the three- Hopkins formed from out-of-range MTC devices and UEs can significantly improve the coverage and average rate of the entire network.
Abstract: With a wide range of applications, Machine-to-Machine (M2M) communication has become an emerging technology for connecting generic machines to the Internet. To ensure ubiquity in connections across all machines, it is necessary to have a standard infrastructure, such as 3GPP LTE-A network infrastructure, that facilitates such type of communications. However, owing to the huge scale of ?> machines to be deployed in near future and the nature of data transactions, ensuring ubiquitous connections among all the machines will be difficult. Solutions that not only maintain connectivity but also route machine data in a cost effective manner are the need of the hour. In this context, it has been suggested that Device-to-Device (D2D) communication can play a very important role in expanding network coverage and routing the data between source-destination machine pairs. In this paper, we conduct a feasibility study to highlight the impact of multi-hop D2D communication in increasing the network coverage and average rate of a Machine Type Communication (MTC) device. We present a stochastic geometry based framework to analyze the coverage probability and average data rate of a three-hop M2M network deployed along with User Equipments (UEs) and conduct extensive simulations to study the system performance. Our simulation results show that the three-hop M2M network formed from out-of-range MTC devices and UEs can significantly improve the coverage and average rate of the entire network. Due to the mobility of users in the network, design of robust routing mechanisms in such a time evolving network becomes difficult. Hence, we suggest the use of space-time graph built from the predicted user locations to design a cost efficient multi-hop D2D topology that enables routing of MTC data to its destination.
27 citations
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TL;DR: Simulation results show that high system throughput can be realized with the proposed algorithm and the fairness requirement can also be satisfied.
Abstract: In TD-LTE-A system, dual layer beamforming is introduced to improve throughput of specific users with high SINRs. In order to solve the problem of resource allocation for multi-user dual layer beamforming, a low complexity joint user grouping and resource allocation algorithm is proposed in this letter. We first calculate priorities of all active users according to channel quality and then the resource block (RB) corresponding to the user with highest priority is decided. After that, other users allocated to the above RB are selected based on our proposed user grouping method which considers both inter-user interference and channel quality. The process repeats so that inter-user interference can be reduced and system throughput can be improved. Simulation results show that high system throughput can be realized with the proposed algorithm and the fairness requirement can also be satisfied.
27 citations
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08 Jun 2015TL;DR: A simple and secure uniform group-based handover authentication scheme for a lot of MTC devices based on the multi-signature and aggregate message authentication codes (AMAC) techniques, which is to fit in with all of the mobility scenarios in the LTE-A networks.
Abstract: Machine Type Communication (MTC) as one of the most important wireless communication technologies in the future wireless communication, has become the new business growth point of mobile communication network. It is a key point to achieve seamless handovers within Evolved Universal Terrestrial Radio Access Network (E-UTRAN) for a large number of MTC devices in order to support mobility in the Long Term Evolution Advanced (LTE-A) networks. When a good deal of MTC devices simultaneously roam from a base station to another, the current handover mechanisms suggested by the third Generation Partnership Project (3GPP) require several handover signaling interactions, which could cause the signaling load over the network nodes. Besides, several distinct handover procedures are proposed for different mobility scenarios, which will increase the system complexity. In this paper, we propose a simple and secure uniform group-based handover authentication scheme for a lot of MTC devices based on the multi-signature and aggregate message authentication codes (AMAC) techniques, which is to fit in with all of the mobility scenarios in the LTE-A networks. Compared with the current 3GPP standards, our scheme can achieve a simple authentication process with robust security protection, and thus avoid signaling congestion.
27 citations
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01 Oct 2012TL;DR: Results show that reducing the number of active cells using sleep mode at base stations, in low to medium traffic load conditions, combined with the deployment of small cells offer energy gains in both homogeneous and heterogeneous networks, but the most significant gains are observed inheterogeneous networks.
Abstract: Traditionally mobile operators have met the surge in mobile data traffic and the growing number of rural subscribers by deploying more macro base stations. This increases overall energy consumption, operational costs and carbon footprint of cellular networks. In this paper we investigate solutions for reducing the number and size of active macro cells following traffic load conditions in both homogeneous and heterogeneous networks. Results are presented as overall energy reduction gains for homogeneous macro-only and micro-only networks and heterogeneous joint macro-relay and micro-relay networks, using long-term-evolution-advanced technology. Results show that reducing the number of active cells using sleep mode at base stations, in low to medium traffic load conditions, combined with the deployment of small cells offer energy gains in both homogeneous and heterogeneous networks, but the most significant gains are observed in heterogeneous networks.
27 citations
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24 Sep 2009TL;DR: CoMP not only reduces the inter-cell interference (ICI), but also increases the cell average and cell edge user throughput in the both uplink and downlink.
Abstract: In this paper a new technology is introduced for LTE-Advanced to meet the requirement of IMT-Advanced. The proposed scheme is Coordinated multi-point transmission and reception (CoMP). This method not only reduces the inter-cell interference (ICI), but also increases the cell average and cell edge user throughput in the both uplink and downlink. CoMP is specifically introduced in the following part.
27 citations