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.

Capacity and Energy Efficiency of Picocell Deployment in LTE-A Networks

Abstract: In this paper, we show the impact of deploying picocells on the capacity and energy efficiency of LTE-A networks. We analyze the Erlang-like capacity of a network composed of macro networks only and study the impact of introducing a number of picocells per site. Knowing that the capacity is not the only factor that will drive the evolution of the network, we also consider the energy efficiency as a Key Performance Indicator (KPI). Our results show that, in some scenarios, introducing picocells is a good network densification method as they achieve a higher network capacity with good energy efficiency.

MIMO Schemes in UTRA LTE, A Comparison

Abstract: The long term evolution of UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access, abbreviated as UTRA LTE, will be based on OFDM (orthogonal frequency division multiplexing). Furthermore, MIMO (multiple-input multiple-output) techniques have been considered as a means for the improvement of wireless connectivity. In wireless systems, high data rates in the downlink are desirable: Furthermore, with respect to an efficient implementation, the downlink requires a thorough assessment. In particular, the Alamouti and the V-BLAST (Vertical Bell Labs Layered Space Time) schemes are seen as interesting concepts. In this communication, the authors will compare these two MIMO schemes w.r.t. the achievable performance in the UTRA LTE downlink using up to two transmit and two receive antennas. Furthermore, the authors will discuss the deployment of spatial multiplexing in the UTRA LTE downlink and will show that the performance of successive interference cancellation (SIC) based data detection techniques for MIMO-OFDM is beneficial.

Uplink Performance Evaluation of Wireless Self-Backhauling Relay in LTE-Advanced

Abstract: LTE-Advanced is the next major evolution step for E-UTRAN LTE in 3rd Generation Partnership Project (3GPP). One of the key technology enhancements in LTE-Advanced to fulfill the performance requirement and to improve the user experience at cell edge is wireless self-backhauling relay, so called "Type-1 Relay". In the recent 3GPP RAN plenary, Type-1 relay was approved as a work item in release 10. Type-1 relay is an in-band and half-duplex relay which means the access link and backhaul link operates in the same band and the transmission on access link and backhaul link are time multiplexed. In this paper, Type-1 relay is modeled with the realistic backhaul link and the consideration on the limitations to access link scheduling. Microsoft C++ based system-level simulator is used to evaluate the performance gain that brings by Type-1 relay, and also shows the limitation of Type-1 relay.

Resource Allocation for Device-to-Device Communication in LTE-A Network: A Stackelberg Game Approach

Abstract: As a promising technology, Device-to-Device (D2D) communication can bring some advantages such as high bit rates, low delays, low power consumption by reusing frequency band with the cellular user equipments (UEs). While at the same time, inter-cell and intra-cell interference is inevitable. In this paper, we propose an algorithm Stackelberg game based to jointly allocate power and resources when uplink frequency is shared. Specially, we group evolved NodeB (eNB) and D2D UE to form the seller- buyer pair. In the game, eNB sets prices to reduce the interference that it suffers from, meanwhile maximize its revenue. For given specified prices, the D2D users compete the resources to communicate with each other and reach their individual utility maximization. Simulation results prove that satisfying performance can be achieved by using the proposed mechanisms.

EC-AKA2 a revolutionary AKA protocol

Abstract: Security is increasingly demanding in mobile communication, especially LTE, and the incremental value of transmitted assets over wireless networks pushes risk way above acceptable thresholds. Decision is continuously moving towards the user side, while the need for seamless security is becoming a must. Under all these requirements, 3GPP failed to propose a new Authentication and Key Agreement Protocol that solves the vulnerabilities found in the current AKA, and implement user preferences in network selection, thus 3GPP failed to meet LTE's current security needs. This paper proposes a complete AKA protocol that solve four different LTE-AKA weaknesses. The proposed protocol is backward compatible, needs no additional investment and achieves great QoS performance.