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.

Centralized and Distributed Solutions for Fast Muting Adaptation in LTE-Advanced HetNets

Abstract: Enhanced intercell interference coordination (eICIC) is known to provide promising performance benefits for Long-Term Evolution Advanced heterogeneous networks (LTE-Advanced HetNets). The use of eICIC facilitates more flexible interlayer load balancing by means of small-cell range extension (RE) and almost blank subframes (ABSs). Although the eICIC configuration (RE and ABS) ideally should be instantaneously adapted to follow the fluctuations of the traffic and the channel conditions over time, previous studies have focused on slow intercell coordination. In this paper, we investigate fast-dynamic eICIC solutions for centralized and distributed radio resource management (RRM) architectures. The centralized RRM architecture assumes macrocells and remote radio heads (RRHs) interconnected via high-speed fronthaul connections, whereas the distributed architecture is based on traditional macrocell and picocell deployments with an X2 backhaul interface. Two different fast muting adaptation algorithms are derived, and it is shown how those can be applied to both the centralized and distributed architectures. Performance results with bursty traffic show that the fast-dynamic adaptation provides significant gains, both in fifth-percentile and 50th-percentile user throughputs, and improvements in user fairness. The best performance is naturally obtained for the centralized architecture, although the performance of the distributed architecture is comparable for the cases where enhanced X2 intercell information exchange is exploited.

A 5G cellular technology for distributed monitoring and control in smart grid

Abstract: In Smart Grids the flow of electricity and information is strictly interrelated with the management and control of the electricity supply system. ICT is not only an extension or a modernization of the power system equipment, but a fundamental requirement for supporting the distribution network monitoring, operation and control. To enable monitoring and control of the Smart Grid and accommodate the large realtime data flow between controlled equipment and the distribution management system it is necessary the deployment of advanced sensors and measurement systems along with the communication network infrastructure. In this paper two different strategies for power network monitoring and control are compared: an LTE-based centralized management approach and a 5G-based distributed management approach. The two types of communications systems are compared considering their performances during fault management in a Smart Grid scenario.

A privacy-preserving group authentication protocol for machine-type communication in LTE/LTE-A networks

Abstract: Machine-type communication MTC is a very important application of the Internet of things. It has a vast market and application scenarios. However, supporting a large number of low-power devices transmission is an important issue in long-term evolution/long-term evolution advanced LTE/LTE-A networks. Specifically, when a large number of machine-type communication devices MTCDs with low-power consumption requirements simultaneously request access to the LTE/LTE-A networks, each MTCD needs an independent complete access authentication process with core network, which may cause a serious signaling congestion in the core network. To solve this problem, in this paper, we propose a novel group authentication protocol with privacy-preserving for MTC in the LTE/LTE-A networks. The proposed protocol cannot only simultaneously authenticate a group of MTCDs and minimize the signaling overhead but also provide robust privacy-preserving for each MTCD including anonymity, unlinkability, and traceability. In particular, our scheme can avoid denial of service attack by filtering some illegal devices in the first four procedures of the mutual authentication. Moreover, our scheme fulfills all the security requirements of the MTC in LTE/LTE-A networks. In addition, the formal verification by the ProVerif tool shows that the proposed scheme is secure against various malicious attacks, and the performance evaluation indicates that it achieves outstanding results in terms of signaling and computation overhead. Copyright © 2016 John Wiley & Sons, Ltd.

A 1Gbps LTE-advanced turbo-decoder ASIC in 65nm CMOS

Abstract: This paper presents a turbo-decoder ASIC for 3GPP LTE-Advanced supporting all specified code rates and block sizes. The highly parallelized architecture employs 16 SISO decoders with an optimized state-metric initialization scheme that reduces SISO-decoder latency, which is key for achieving very-high throughput. A novel CRC implementation for parallel turbo decoding prevents the decoder from performing redundant turbo iterations. The 65nm ASIC achieves a record data throughput of 1.013Gbps at 5.5 iterations with unprecedented energy efficiency of 0.17nJ/bit/iter.

Downlink Scheduling in 3GPP Long Term Evolution (LTE)

Abstract: LTE is the evolution of the Universal Mobile Telecommunications System (UMTS) A scheduler assigns the shared resources (time and frequency) among users terminals I have examined the impact of different scheduling schemes on the throughput and I also have investigated the fairness of each scheduling scheme The main contribution of this thesis is to propose a new scheduling algorithm that can be comprise between the throughput and the fairness