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.

Signalling Overhead Evaluation of HeNB Mobility Enhanced Schemes in 3GPP LTE-Advanced

Abstract: Home eNodeB (HeNB) is a low-power access point using the local broadband connections or a separate RF backhaul to access the mobile operator's network for the user equipment(UE), which can provide better indoor coverage and satisfy the upcoming demand of high data rate for users. Considering the potential frequent mobility between HeNB-HeNB and HeNBeNB, HeNB mobility enhancement is proposed as one of the most important work items in 3GPP LTE-Advanced. In this paper, four X2 interface based HeNB mobility enhanced architectures are explicitly discussed in terms of signalling overhead evaluation. The numerical results show that the direct-X2 based option 2 in HeNB-HeNB scenario and the X2-GW based option 3 in eNB-HeNB scenario have the best trade-off in signalling overhead and complexity respectively.

Investigation on Mobility Management for Carrier Aggregation in LTE-Advanced

Abstract: In Long-Term Evolution-Advanced (LTE-A), which is currently in the process of standardization in the 3rd generation partnership project (3GPP), carrier aggregation (CA) was introduced as a main feature for bandwidth extension while maintaining backward compatibility with LTE Release 8 (Rel. 8). In the CA mode of operation, since two or more component carriers (CCs), each of which is compatible with LTE Rel. 8, are aggregated, mobility management for CCs such as inter/intra-frequency handover, CC addition, and CC removal is needed to provide sufficient coverage and better overall signal quality. Therefore, the signaling overhead for Radio Resource Control (RRC) reconfiguration for the mobility management of CCs in LTE-A is expected to be larger than that in LTE Rel. 8. In addition, CA allows aggregation of cells with different types of coverage, and therefore, the signaling overhead might be dependent on the coverage of each CC assumed in a CA deployment scenario. This paper presents evaluation results on the CC control overhead with several CC management policies in some CA deployment scenarios, and shows that the increase in the control overhead is not significant even in a CA deployment scenario with overlaid picocells.

Bandwidth and energy efficiency of video broadcasting services over LTE/LTE-A

Abstract: Mobile video services are becoming a dominant traffic category in emerging fourth generation (4G) cellular networks such as the 3GPP Long-Term Evolution (LTE) and LTE-Advanced (LTE-A). In particular, mobile video broadcasting services such as 3GPP evolved Multimedia Multicast/Broadcast Service (eMBMS) will require considerable resources for highquality video service delivery with high coverage probability. Faced with the challenge of bandwidth and energy efficient eMBMS provisioning over LTE/LTE-A, in this paper, we develop simple analytical tools for evaluation of average service data rates, bandwidth and energy-consumption requirements in different eMBMS LTE/LTE-A service configurations. Moreover, we introduce and evaluate novel bandwidth and energy performance measures defined per unit of service with the goal of comparing the service delivery efficiency of different LTE/LTE-A configurations. The results in the paper focus on eMBMS provisioning over two macro-cellular LTE/LTE-A configurations in 3GPP: i) a single frequency network eMBMS, and ii) a single-cell eMBMS.

Adaptive and Distributed CoMP Scheduling in LTE-Advanced Systems

Abstract: Coordinated Multi-Point (CoMP) transmission and reception is one of the most promising technologies introduced in 3GPP Long Term Evolution-Advanced (LTE-Advanced) standard. Especially targeting the User Equipments (UEs) in the celledge region, CoMP technology improves the edge throughput and reliability in two ways: Joint Transmission (JT) and Coordinated Scheduling/Beamforming (CS/CB). This paper proposes an adaptive and distributed CoMP scheduling algorithm which allocates the frequency band to each UE and could operate in either JT or CS/CB mode of CoMP. Our contributions include (a) proposing an algorithm resolving subband allocation, UE selection, and CoMP mode decision jointly; and (b) defining the message format exchanged among eNBs for cooperation. The performance of the proposed algorithm is comparatively evaluated along with that of other schemes such as non-coordination and frequency reuse schemes in terms of both average and outage throughput.