328 citations · 620 across the 45 of their papers we have counts for
21 papers · 1 filter
A Note on Decoding Order in User Grouping and Power Optimization for Multi-Cell NOMA with Load Coupling
Lei You, Di Yuan
In this technical note, we present a new theoretical result for resource optimization with non-orthogonal multiple access (NOMA). For multi-cell scenarios, a so-called load-couplin…
Resource Optimization with Flexible Numerology and Frame Structure for Heterogeneous Services
Lei You, Qi Liao, Nikolaos Pappas +1
We explore the potential of optimizing resource allocation with flexible numerology in frequency domain and variable frame structure in time domain, in presence of services with di…
A Framework for Optimizing Multi-cell NOMA: Delivering Demand with Less Resource
Lei You, Lei Lei, Di Yuan +3
Non-orthogonal multiple access (NOMA) allows multiple users to simultaneously access the same time-frequency resource by using superposition coding and successive interference canc…
Wireless Network-Level Partial Relay Cooperation: A Stable Throughput Analysis
Nikolaos Pappas, Jeongho Jeon, Di Yuan +2
In this work, we study the benefit of partial relay cooperation. We consider a two-node system consisting of one source and one relay node transmitting information to a common dest…
User-centric Performance Optimization with Remote Radio Head Cooperation in C-RAN
Lei You, Di Yuan
In a cloud radio access network (C-RAN), distributed remote radio heads (RRHs) are coordinated by baseband units (BBUs) in the cloud. The centralization of signal processing provid…
Resource Optimization with Load Coupling in Multi-cell NOMA
Lei You, Di Yuan, Lei Lei +3
Optimizing non-orthogonal multiple access (NOMA) in multi-cell scenarios is much more challenging than the single-cell case because inter-cell interference must be considered. Most…
An Examination of the Benefits of Scalable TTI for Heterogeneous Traffic Management in 5G Networks
Emmanouil Fountoulakis, Nikolaos Pappas, Qi Liao +2
The rapid growth in the number and variety of connected devices requires 5G wireless systems to cope with a very heterogeneous traffic mix. As a consequence, the use of a fixed TTI…
Joint CoMP-Cell Selection and Resource Allocation with Fronthaul-Constrained C-RAN
Lei You, Di Yuan
Cloud-based Radio Access Network (C-RAN) is a promising architecture for future cellular networks, in which Baseband Units (BBUs) are placed at a centralized location, with capacit…
Energy-Aware Wireless Relay Selection in Load-Coupled OFDMA Cellular Networks
Lei You, Di Yuan, Nikolaos Pappas +1
We investigate transmission energy minimization via optimizing wireless relay selection in orthogonal-frequency-division multiple access (OFDMA) networks. We take into account the…
Power and Channel Allocation for Non-orthogonal Multiple Access in 5G Systems: Tractability and Computation
Lei Lei, Di Yuan, Chin Keong Ho +1
Network capacity calls for significant increase for 5G cellular systems. A promising multi-user access scheme, non-orthogonal multiple access (NOMA) with successive interference ca…
A Performance Study of Energy Minimization for Interleaved and Localized FDMA
Lei You, Lei Lei, Di Yuan
Optimal channel allocation is a key performance engineering aspect in single-carrier frequency-division multiple access (SC-FDMA). It is of significance to consider minimum sum pow…
Range Assignment for Power Optimization in Load-Coupled Heterogeneous Networks
Lei You, Lei Lei, Di Yuan
We consider the problem of transmission energy op- timization via range assignment for Low Power Nodes (LPNs) in Long Term Evolution (LTE) Heterogenous Networks (HetNets). The opti…
Load Balancing via Joint Transmission in Heterogeneous LTE: Modeling and Computation
Lei You, Lei Lei, Di Yuan
As one of the Coordinated Multipoint (CoMP) techniques, Joint Transmission (JT) can improve the overall system performance. In this paper, from the load balancing perspective, we s…
Optimizing Power and User Association for Energy Saving in Load-Coupled Cooperative LTE
Lei You, Lei Lei, Di Yuan
We consider an energy minimization problem for cooperative LTE networks. To reduce energy consumption, we investigate how to jointly optimize the transmit power and the association…
Load Optimization with User Association in Cooperative and Load-Coupled LTE Networks
Lei You, Di Yuan
We extend the problem of optimizing user association for load balancing in cellular networks along two dimensions. First, we consider joint transmission (JT), which is one of the c…
Optimal Cell Clustering and Activation for Energy Saving in Load-Coupled Wireless Networks
Lei Lei, Di Yuan, Chin Keong Ho +1
Optimizing activation and deactivation of base station transmissions provides an instrument for improving energy efficiency in cellular networks. In this paper, we study optimal ce…
On Power and Load Coupling in Cellular Networks for Energy Optimization
Chin Keong Ho, Di Yuan, Lei Lei +1
We consider the problem of minimization of sum transmission energy in cellular networks where coupling occurs between cells due to mutual interference. The coupling relation is cha…
Data Offloading in Load Coupled Networks: A Utility Maximization Framework
Chin Keong Ho, Di Yuan, Sumei Sun
We provide a general framework for the problem of data offloading in a heterogeneous wireless network, where some demand of cellular users is served by a complementary network. The…
Minimum-Length Scheduling with Finite Queues: Solution Characterization and Algorithmic Framework
Vangelis Angelakis, Anthony Ephremides, Qing He +1
We consider a set of transmitter-receiver pairs, or links, that share a common channel and address the problem of emptying backlogged queues at the transmitters in minimum time. Th…
Analysis of Cell Load Coupling for LTE Network Planning and Optimization
Iana Siomina, Di Yuan
System-centric modeling and analysis are of key significance in planning and optimizing cellular networks. In this paper, we provide a mathematical analysis of performance modeling…
On Optimal Link Activation with Interference Cancellation in Wireless Networking
Di Yuan, Vangelis Angelakis, Lei Chen +2
A fundamental aspect in performance engineering of wireless networks is optimizing the set of links that can be concurrently activated to meet given signal-to-interference-and-nois…