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Minimizing response times to meet legal requirements and serve patients in a timely manner is crucial for Emergency Medical Service (EMS) systems. Achieving this goal necessitates optimizing operational decision-making to efficiently manage…

机器学习 · 计算机科学 2025-03-18 Maximiliane Rautenstrauß , Maximilian Schiffer

The vehicular ad-hoc network (VANET) based on dedicated short-range communication (DSRC) is a distributed communication system, in which all the nodes share the wireless channel with carrier sense multiple access/collision avoid (CSMA/CA)…

网络与互联网体系结构 · 计算机科学 2022-08-02 Yong Zhang , Mao Ye , Lin Guan

For orthogonal multiple access (OMA) systems, the number of served user equipments (UEs) is limited to the number of available orthogonal resources. On the other hand, non-orthogonal multiple access (NOMA) schemes allow multiple UEs to use…

网络与互联网体系结构 · 计算机科学 2022-09-01 Eike-Manuel Bansbach , Yigit Kiyak , Laurent Schmalen

This paper studies joint uplink (UL) and downlink (DL) resource allocation in user-centric orthogonal frequency division multiple access (OFDMA) cloud radio access network (CRAN), where the users select the distributed remote radio heads…

信息论 · 计算机科学 2019-06-21 Zehong Lin , Yuan Liu

Spectrum management has been identified as a crucial step towards enabling the technology of a cognitive radio network (CRN). Most of the current works dealing with spectrum management in the CRN focus on a single task of the problem, e.g.,…

信息论 · 计算机科学 2011-02-11 Mingyi Hong , Alfredo Garcia , Stephen Wilson

Software Defined Vehicles face an increasing computational gap as advanced algorithms and frequent software updates demand more processing power while onboard hardware remains static throughout a vehicle's 10+ year lifespan. This mismatch…

软件工程 · 计算机科学 2026-04-30 Falk Dettinger , Matthias Weiß , Baran Can Gül , Sruthi Mangala Suresh , Nasser Jazdi , Michael Weyrich

Next-generation wireless networks need to handle massive user access effectively. This paper addresses the problem of joint group scheduling and multicast beamforming for downlink transmission with many active user groups. Aiming to…

信息论 · 计算机科学 2024-06-26 Chong Zhang , Min Dong , Ben Liang , Ali Afana , Yahia Ahmed

Most optimal routing problems focus on minimizing travel time or distance traveled. Oftentimes, a more useful objective is to maximize the probability of on-time arrival, which requires statistical distributions of travel times, rather than…

Recently, the paradigm of massive ultra-reliable low-latency IoT communications (URLLC-IoT) has gained growing interest. Reliable delay-critical uplink transmission in IoT is a challenging task since low-complex devices typically do not…

信息论 · 计算机科学 2024-01-23 Jyri Hämäläinen , Rui Dinis , Mehmet C. Ilter

This paper focuses on the analytical probabilistic modeling of vehicular traffic. It formulates a stochastic node model. It then formulates a network model by coupling the node model with the link model of Lu and Osorio (2018), which is a…

计算机科学与博弈论 · 计算机科学 2022-09-07 Jing Lu , Carolina Osorio

We investigate the downlink multi-user MIMO (MU-MIMO) scheduling problem in the presence of imperfect Channel State Information at the transmitter (CSIT) that comprises of coarse and current CSIT as well as finer but delayed CSIT. This…

信息论 · 计算机科学 2013-03-21 Wenzhuo Ouyang , Narayan Prasad , Sampath Rangarajan

We study real-time routing policies in smart transit systems, where the platform has a combination of cars and high-capacity vehicles (e.g., buses or shuttles) and seeks to serve a set of incoming trip requests. The platform can use its…

最优化与控制 · 数学 2021-03-22 Siddhartha Banerjee , Chamsi Hssaine , Noémie Périvier , Samitha Samaranayake

As the automotive industry is developing autonomous driving systems and vehicular networks, attention to truck platooning has increased as a way to reduce costs (fuel consumption) and improve efficiency in the highway. Recent research in…

系统与控制 · 电气工程与系统科学 2022-11-15 Thiago S. Gomides , Evangelos Kranakis , Ioannis Lambadaris , Yannis Viniotis

Despite being the subject of a growing body of research, non-orthogonal multiple access has failed to garner sufficient support to be included in modern standards. One of the more promising approaches to non-orthogonal multiple access is…

信号处理 · 电气工程与系统科学 2024-10-28 Dylan Wheeler , Erin E. Tripp , Balasubramaniam Natarajan

We consider uncoordinated random uplink non-orthogonal multiple access (NOMA) systems using a set of predetermined power levels. We propose to optimize the probabilities of selection of power levels in order to minimize performance metrics…

信号处理 · 电气工程与系统科学 2025-11-20 Noura Sellami , Mohamed Siala

Dynamic Time-division duplex (TDD) can provide efficient and flexible splitting of the common wireless cellular resources between uplink (UL) and downlink (DL) users. In this paper, the UL/DL optimization problem is formulated as a…

网络与互联网体系结构 · 计算机科学 2016-11-18 Mohammed S. ElBamby , Mehdi Bennis , Walid Saad , Matti Latva-aho

We consider the problem of simultaneous user-scheduling, power-allocation, and rate-selection in an OFDMA downlink, with the goal of maximizing expected sum-utility under a sum-power constraint. In doing so, we consider a family of generic…

信息论 · 计算机科学 2015-05-20 Rohit Aggarwal , Mohamad Assaad , C. Emre Koksal , Philip Schniter

In this paper, we study the resource allocation and user scheduling problem for a downlink nonorthogonal multiple access network where the base station allocates spectrum and power resources to a set of users. We aim to jointly optimize the…

网络与互联网体系结构 · 计算机科学 2016-11-17 Boya Di , Lingyang Song , Yonghui Li

With the explosive growth of vehicle applications, vehicular networks based on millimeter wave (mmWave) bands have attracted interests from both academia and industry. mmWave communications are able to utilize the huge available bandwidth…

信息论 · 计算机科学 2022-06-02 Lan Su , Yong Niu , Zhu Han , Bo Ai , Ruisi He , Yibing Wang , Ning Wang , Xiang Su

With the rapid growth of mobile traffic demand, a promising approach to relieve cellular network congestion is to offload users' traffic to small-cell networks. In this paper, we investigate how the mobile users (MUs) can effectively…

网络与互联网体系结构 · 计算机科学 2015-10-01 Yuan Wu , Yanfei He , Liping Qian , Jianwei Huang , Xuemin , Shen