119 citations · 884 across the 130 of their papers we have counts for
15 papers · 1 filter
Efficient Beam Alignment in Millimeter Wave Systems Using Contextual Bandits
Morteza Hashemi, Ashutosh Sabharwal, C. Emre Koksal +1
In this paper, we investigate the problem of beam alignment in millimeter wave (mmWave) systems, and design an optimal algorithm to reduce the overhead. Specifically, due to direct…
The Age of Information in Multihop Networks
Ahmed M. Bedewy, Yin Sun, Ness B. Shroff
Information updates in multihop networks such as Internet of Things (IoT) and intelligent transportation systems have received significant recent attention. In this paper, we minim…
A Change-Detection based Framework for Piecewise-stationary Multi-Armed Bandit Problem
Fang Liu, Joohyun Lee, Ness Shroff
The multi-armed bandit problem has been extensively studied under the stationary assumption. However in reality, this assumption often does not hold because the distributions of re…
Information Directed Sampling for Stochastic Bandits with Graph Feedback
Fang Liu, Swapna Buccapatnam, Ness Shroff
We consider stochastic multi-armed bandit problems with graph feedback, where the decision maker is allowed to observe the neighboring actions of the chosen action. We allow the gr…
Designing Low-Complexity Heavy-Traffic Delay-Optimal Load Balancing Schemes: Theory to Algorithms
Xingyu Zhou, Fei Wu, Jian Tan +2
We establish a unified analytical framework for load balancing systems, which allows us to construct a general class of policies that are both throughput optimal and heavy-traf…
Energy-Efficient Power and Bandwidth Allocation in an Integrated Sub-6 GHz -- Millimeter Wave System
Morteza Hashemi, C. Emre Koksal, Ness B. Shroff
In mobile millimeter wave (mmWave) systems, energy is a scarce resource due to the large losses in the channel and high energy usage by analog-to-digital converters (ADC), which sc…
Minimizing the Age of Information through Queues
Ahmed M. Bedewy, Yin Sun, Ness B. Shroff
In this paper, we investigate scheduling policies that minimize the age of information in single-hop queueing systems. We propose a Last-Generated, First-Serve (LGFS) scheduling po…
On Resource Pooling and Separation for LRU Caching
Jian Tan, Guocong Quan, Kaiyi Ji +1
Caching systems using the Least Recently Used (LRU) principle have now become ubiquitous. A fundamental question for these systems is whether the cache space should be pooled toget…
Towards Fast-Convergence, Low-Delay and Low-Complexity Network Optimization
Sinong Wang, Ness Shroff
Distributed network optimization has been studied for well over a decade. However, we still do not have a good idea of how to design schemes that can simultaneously provide good pe…
Concurrent Channel Probing and Data Transmission in Full-duplex MIMO Systems
Zhenzhi Qian, Fei Wu, Zizhan Zheng +2
An essential step for achieving multiplexing gain in MIMO downlink systems is to collect accurate channel state information (CSI) from the users. Traditionally, CSIs have to be col…
Reward Maximization Under Uncertainty: Leveraging Side-Observations on Networks
Swapna Buccapatnam, Fang Liu, Atilla Eryilmaz +1
We study the stochastic multi-armed bandit (MAB) problem in the presence of side-observations across actions that occur as a result of an underlying network structure. In our model…
Age-Optimal Information Updates in Multihop Networks
Ahmed M. Bedewy, Yin Sun, Ness B. Shroff
The problem of reducing the age-of-information has been extensively studied in the single-hop networks. In this paper, we minimize the age-of-information in general multihop networ…
Delay-Optimal Probabilistic Scheduling with Arbitrary Arrival and Adaptive Transmission
Xiang Chen, Wei Chen, Joohyun Lee +1
In this paper, we aim to obtain the optimal delay-power tradeoff and the corresponding optimal scheduling policy for an arbitrary i.i.d. arrival process and adaptive transmissions.…
Security Game with Non-additive Utilities and Multiple Attacker Resources
Sinong Wang, Ness Shroff
There has been significant interest in studying security games for modeling the interplay of attacks and defenses on various systems involving critical infrastructure, financial sy…
Dual Sub-6 GHz -- Millimeter Wave Beamforming and Communications to Achieve Low Latency and High Energy Efficiency in 5G Systems
Morteza Hashemi, C. Emre Koksal, Ness B. Shroff
We propose a hybrid architecture that integrates RF (i.e., sub-6 GHz) and millimeter wave (mmWave) technologies for 5G cellular systems. In particular, communications in the mmWave…