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.

A comprehensive performance analysis of LTE and Mobile WiMAX

Abstract: LTE (3GPP Release8) and Mobile WiMAX (IEEE 802.16e) are discussed extensively as choices for the next generation of mobile broadband technologies. In this paper, LTE and Mobile WiMAX are analyzed comprehensively from a physical layer performance point of view for different antenna diversity modes in downlink and uplink transmissions. The objective of this study is to fill the current gaps in published literature for comparative in-depth analysis of the performance of LTE and Mobile WiMAX. Our study considers maximum channel bandwidth and the least control information overhead for both protocols. Performance comparison results for different scenarios of TDD (Time Division Duplex) operation in similar configurations suggest that LTE in general outperforms Mobile WiMAX. The throughput comparison of FDD (Frequency Division Duplex) and TDD operations is also presented in this paper to provide a complete discussion of physical layer maximum throughput in LTE.

Secure and privacy-preserving AMI-utility communications via LTE-A networks

Abstract: In smart grid Automatic Metering Infrastructure (AMI) networks, smart meters should send consumption data to the utility company (UC) for grid state estimation. Creating a new infrastructure to support this communication is costly and may take long time which may delay the deployment of the AMI networks. The Long Term Evolution-Advanced (LTE-A) networks can be used to support the communications between the AMI networks and the UC. However, since these networks are owned and operated by private companies, the UC cannot ensure the security and privacy of the communications. Moreover, the data sent by the AMI networks have different characteristics and requirements than most of the existing applications in LTE-A networks. For example, there is a strict data delay requirement, data is short and transmitted every short time, data is sent at known/predefined time slots, and there is no handover. In this paper, we study enabling secure and privacy preserving AMI-UC communications via LTE-A networks. The proposed scheme aims to achieve essential security requirements such as authentication, confidentiality, key agreement and data integrity without trusting the LTE-A networks. Furthermore, an aggregation scheme is used to protect the privacy of the electricity consumers. It can also reduce the amount of required bandwidth which can reduce the communication cost. Our evaluations have demonstrated that our proposals are secure and require low communication/computational overhead.

Grouping based inter-cell interference coordination in LTE-A dense small-cell networks

Abstract: Deployment of small cells in a cellular network has emerged as a cost-effective way of supporting exponentially increasing demand of wireless data services. However, an unplanned small cell deployment with full frequency reuse could bring severe inter-cell interference. In this study, an enhanced small cell grouping based inter-cell interference control has been presented for dense small cell networks (SCN) in LTE-Advanced. Specifically, we divide the small cells into different coordinated multi-point processing (CoMP) groups according to the mutual interference with adjacent small cells. Within a CoMP group, multi-cell cooperation is implemented for intra-cell interference cancellation, while for different small cell groups, we propose a shifted frequency scheduling with dynamic power control to reduce the inter-group interference. The performance gain is evaluated and verified in a system level simulator.

IP Design and Implementation of a LTE-A Cell Blind Detect Scheme

Abstract: The current LTE-Advanced system architecture tends to flatten and the data transfer rate of mobile communication system continues to increase, which needs to complete cell blind detect more accurate and quick, and indicates that the design of the LTE-A system terminal need to be updated. Therefore, this paper will find a new cell blind detect scheme, then designing a corresponding IP which considers the hardware performance, area, power and scalability from the perspective of ASIC implementation, and using ASIC tools to verification and logic synthesis. Implementation results show that the designed IP can be used for a mobile terminal chip design.

Review of studies on end-to-end QoS in LTE networks

Abstract: The study of the end-to-end QoS (Quality of Service) features of wireless networks may give to mobile operators ways to manage the network infrastructures from a trustworthy and robustness perspective, to optimize the network usage and guarantee desired quality of services to end user. In this paper a review of studies on end-to-end QoS in LTE networks is presented. The most important features of the LTE (Long Term Evolution) 3GPP Standard are its network architecture, its ability to support the end-to-end QoS and its ability to differentiate the user services. The wireless standard which has immediately preceded LTE is the WiMAX Standard. Such a standard is based on the same radio transmission system (OFDM). Therefore in the first part of the paper we compare the QoS aspects of the LTE and WiMAX. In the second part of the paper we focus on QoS aspects in E-UTRAN (Evolved Universal Terrestrial Radio Access Network) section of LTE networks. In the third part of the paper we also analyze the QoS aspects of the end-to-end LTE network: the E-UTRAN section and the EPC (Evolved Packet Core) section.