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.

Energy Consumption Minimization for FiWi Enhanced LTE-A HetNets with UE Connection Constraint

Abstract: The fiber-wireless (FiWi) enhanced LTE-A HetNet, which consists of fiber optic networks as its backhaul and LTE-A HetNets as its wireless front-end, is regarded as a promising technique for a 5G radio access network to host large-scale mobile data transmission. In order to reduce the energy consumption of a FiWi enhanced LTE-A HetNet, we should offload the traffic of lightly loaded BSs to other active BSs and turn them into sleep state, while in order to provide stable service to more user equipments (UEs), we should put as many BSs into active state as possible. Obviously, there is a trade-off between minimizing the energy consumption and maximizing the number of UEs associated with the BSs. However, previous research works either focused on energy consumption minimization or placed emphasis on UE connection maximization, and few of them integrate these two parts together and give an optimal solution. Toward this end, this article studies the issues in energy consumption minimization with the UE connection constraint in FiWi enhanced LTE-A HetNets, and propose a heuristic greedy solution to find an optimal list of active BSs and their associated UEs.

MEC architectural implications for LTE/LTE-A networks

Abstract: Towards 5G mobile networks, the low-latency and high-bandwidth services are highly anticipated; however, legacy 3G and 4G networks now suffers from the mobile data surge. In this sense, pushing network services to the network edge has the potential to improve the traffic latency, user experience, and offload Internet traffic. Although the LTE/LTE-A network can highly benefit from the Mobile Edge Computing (MEC) principle, a detailed MEC architecture is not currently in place. In this work, we propose a modular architecture for the Mobile Edge Host that is ETSI compliant and describe the functional mapping of the architecture to LTE systems. Proof-of-concept demonstrations based on the OpenAirInterface (OAI), a software implementation of LTE/LTE-A systems, present significant benefits of adopting the MEC concept in data caching use case.

Channel and interference measurement in lte/lte-a networks including unlicensed spectrum

Abstract: Channel and interference measurement in long term evolution (LTE)/LTE-Advanced (LTE-A) networks including unlicensed spectrum is discussed in which a user equipment (UE) detects a reference signal from a serving base station over a carrier of a shared spectrum for measurement. The reference signal may be a channel usage beacon signal (CUBS) transmitted by the serving base station prior to transmission or may be a specific channel state information (CSI) reference signal transmitted in the first subframe of a transmission frame. The UE generates a fast CSI feedback report based on the measured reference signal and transmits it to the serving base station. The fast CSI feedback report is received quickly enough by the serving base station such that the base station may apply the CSI feedback to additional transmissions in subsequent subframes within the same transmission frame.

802.11p and LTE/LTE-A based vehicle networking message propagation method

Abstract: The invention relates to an 802.11p and LTE/LTE-A based vehicle networking message propagation method, which is characterized in that a GPS information collection module collects the running speed, the running direction and positional information of a vehicle, a 802.11p communication module of a vehicle which is in the same road section and runs in the same direction and a 802.11p communication module located in an effective communication range form an Ad hoc network, vehicles in the Ad hoc network form a vehicle cluster, the cluster head sends a secure message to an LTE/LTE-A base station at a scheduled time interval, and the LTE/LTE-A base station updates a road table of the vehicle cluster; in an emergency case, vehicles in the same vehicle cluster use the 802.11p communication module to carry out message broadcasting, the cluster head sends the message to the LTE/LTE-A base station, and the LTE/LTE-A base station broadcasts the message to the cluster head of a related vehicle cluster according to the vehicle cluster road table. The 802.11p and LTE/LTE-A based vehicle networking message propagation method has the advantages of high practicability, low deployment cost and the like.

Investigation on elevation beamforming for future LTE-Advanced

Abstract: This paper investigates and analyzes three typical elevation beamforming scenarios which are most likely to be applied in future LTE-Advanced systems: vertical sectorization with same carrier frequency, vertical sectorization with different carrier frequency based on carrier aggregation, and user-specific elevation beamforming. Preliminary evaluation using WINNERII/WINNER+ based 3D MIMO channel modeling is carried out to compare these scenarios with the conventional system with single downtilting. It is shown that the latter two elevation beamforming scenarios can achieve good performance.