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2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)最新文献

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Lightweight Architecture for IoT Devices with Context-aware Autonomous Control 具有上下文感知自主控制的物联网设备的轻量级架构
Pub Date : 2019-04-01 DOI: 10.1109/WCNCW.2019.8902882
Bruno Serra, L. Gomes, Z. Vale
The integration of the Internet of Things (IoT) devices in our buildings is already a reality and the dissemination of such devices would grow in the future. However, much of these devices deal with remote monitoring and/or control without an intrinsic context-aware control. This paper proposes hardware and software architectures for the development of IoT devices with context-aware autonomous control. The efficient and effective control, of the proposed architectures, is demonstrated using two scenarios where one television and one air conditioner unit are controlled according to their contexts. The context-aware control can increase users’ comfort while decreases the use of appliances and resources, resulting in a decrease in energy consumption.
物联网(IoT)设备在我们的建筑中的集成已经成为现实,未来这些设备的传播将会增长。然而,许多这些设备处理远程监控和/或控制,没有内在的上下文感知控制。本文提出了开发具有上下文感知自主控制的物联网设备的硬件和软件架构。通过两个场景演示了所建议的架构的高效和有效控制,其中一个电视和一个空调单元根据其上下文进行控制。情境感知控制可以增加用户的舒适度,同时减少设备和资源的使用,从而降低能耗。
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引用次数: 2
Intelligent Offloading Strategies For High Throughput Traffic Intersection Coordination 高吞吐量交通交叉口协调的智能卸载策略
Pub Date : 2019-04-01 DOI: 10.1109/WCNCW.2019.8902659
Yangan Mo, Mengqi Wang, Tingting Zhang, Qinyu Zhang
Appropriate traffic coordination at road intersections plays a crucial part in modern intelligent transportation systems (ITS). However, in some existing coordination algorithms, the complexity is too high to achieve real time solutions, that restricts their applications. Therefore, we try to propose an efficient computation offloading method based on an optimal coordination framework, by which the traffic throughput can be maximized [1]. Two different objective functions are adopted to make the computation simultaneously, under the constraints of the traffic statistics and communications capabilities. Numerical results show that both strategies can reduce the computation time of the system by approximate 20%. Additionally, as the computation capability of vehicles increases, the optimal offloading schemes achieved by the two proposed strategies may vary accordingly.
交叉口交通协调是现代智能交通系统的重要组成部分。然而,在现有的一些协调算法中,由于复杂度太高而无法实现实时解,限制了它们的应用。因此,我们尝试提出一种基于最优协调框架的高效计算卸载方法,使交通吞吐量最大化[1]。在交通统计和通信能力的约束下,采用两种不同的目标函数同时进行计算。数值结果表明,这两种策略都能使系统的计算时间减少约20%。此外,随着车辆计算能力的增加,两种策略的最优卸载方案可能会有所不同。
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引用次数: 4
A Framework for MEC-enabled Platooning 用于支持mec的队列的框架
Pub Date : 2019-04-01 DOI: 10.1109/WCNCW.2019.8902910
A. Virdis, G. Nardini, G. Stea
In this paper we argue that Multi-access Edge Computing can be an enabler for platooning services. We design a MEC-based application for platooning, whereby vehicles report their speed and position periodically, and the MEC runs a platoon formation algorithm to form platoons, and a platoon coordination control algorithm, to set the acceleration of each vehicle to maintain formation with the necessary safety distance. We simulate the above framework in a realistic scenario, where communications occur through a LTE-Advanced network, and we show that it is effective and inexpensive from a communication point of view.
在本文中,我们认为多访问边缘计算可以成为队列服务的推动者。我们设计了一个基于MEC的队列应用程序,车辆定期报告自己的速度和位置,MEC运行排队算法形成队列,并运行排队协调控制算法,设置每辆车的加速度以保持必要的安全距离。我们在一个通过LTE-Advanced网络进行通信的现实场景中模拟了上述框架,并从通信的角度证明了它是有效且廉价的。
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引用次数: 13
Hybrid Processing for Multi-user Millimeter-Wave Massive MIMO Systems via Matrix Decomposition 基于矩阵分解的多用户毫米波海量MIMO系统混合处理
Pub Date : 2019-04-01 DOI: 10.1109/WCNCW.2019.8902608
Wei Wu, Danpu Liu
Millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) systems utilize hybrid beamforming techniques to alleviate the implementation complexity of combining a large number of antennas. In this paper, we propose a hybrid processing algorithm via matrix decomposition for mmWave massive MU-MIMO systems. Both inter-user interference (IUI) and inter-stream interference (ISI) within the user are taken into consideration. We derive a closed-form expression of digital and analog precoder/combiner to achieve nearlyoptimal performance. In the large system analysis, we prove that the proposed algorithm can obtain unconstrained optimal performance when the number of antennas is infinite. The results indicate that the proposed algorithm outperforms other existing hybrid designs in terms of BER and sum-rate.
毫米波(mmWave)大规模多输入多输出(MIMO)系统利用混合波束形成技术来减轻组合大量天线的实现复杂性。本文提出了一种基于矩阵分解的毫米波海量MU-MIMO系统混合处理算法。同时考虑了用户内部的用户间干扰(IUI)和流间干扰(ISI)。我们推导了数字和模拟预编码器/组合器的封闭表达式,以实现近乎最佳的性能。在大系统分析中,我们证明了该算法在天线数量为无穷大时可以获得无约束的最优性能。结果表明,该算法在误码率和和率方面优于现有的混合算法。
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引用次数: 1
A 3D Ellipsoid Model for Isotropic and Non-Isotropic Scatterers Co-existing Massive MIMO Channels 大规模MIMO信道中各向同性和非各向同性散射体共存的三维椭球模型
Pub Date : 2019-04-01 DOI: 10.1109/WCNCW.2019.8902685
Lingfeng Wang, Jianqiao Chen, Xiaoli Yang, Nan Ma, Ping Zhang
In this paper, we propose a three-dimensional (3D) multi-confocal ellipsoid channel model for massive multiple-input multiple-output (MIMO) communication systems, which considers the coexistence of isotropic scatterers and non-isotropic scatterers. Specifically, the inner ellipsoids are used to model the isotropic scatterers, and the outer ellipsoids are used to model the non-isotropic scatterers. First, under the spherical wavefront assumption, we develop the mathematical relationships between the angle of arrival (AOA) and the angle of departure (AOD), which is more precise than conventional approximation, and can be used to capture the channel non-stationary properties. Second, we study the correlations of the proposed model in detail, and study the impacts of important parameters such as scatterer type and scatterer distribution on it. Finally, our numerical and the simulation results demonstrate that the proposed model can capture features of realistic massive MIMO channels and can be matched well to existing literatures.
本文提出了一种用于大规模多输入多输出(MIMO)通信系统的三维(3D)多共焦椭球信道模型,该模型考虑了各向同性散射体和非各向同性散射体的共存。其中,内椭球体用于模拟各向同性散射体,外椭球体用于模拟非各向同性散射体。首先,在球面波前假设下,我们建立了到达角(AOA)和离开角(AOD)之间的数学关系,该关系比传统近似更精确,可以用来捕捉信道的非平稳特性。其次,详细研究了模型的相关性,研究了散射体类型、分布等重要参数对模型的影响。最后,数值和仿真结果表明,所提出的模型能够很好地捕捉到实际的大规模MIMO信道的特征,并且与已有的文献能够很好地匹配。
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引用次数: 1
Recharging of Flying Base Stations using Airborne RF Energy Sources 使用机载射频能量源的飞行基站充电
Pub Date : 2019-03-31 DOI: 10.1109/WCNCW.2019.8902900
J. Hassan, Ayub Bokani, S. Kanhere
This paper presents a new method for recharging flying base stations, carried by Unmanned Aerial Vehicles (UAVs), using wireless power transfer from dedicated, airborne, Radio Frequency (RF) energy sources. In particular, we study a system in which UAVs receive wireless power without being disrupted from their regular trajectory. The optimal placement of the energy sources are studied so as to maximize received power from the energy sources by the receiver UAVs flying with a linear trajectory over a square area. We find that for our studied scenario of two UAVs, if an even number of energy sources are used, placing them in the optimal locations maximizes the total received power, while achieving fairness among the UAVs. However, in the case of using an odd number of energy sources, we can either maximize the total received power, or achieve fairness, but not both at the same time. Numerical results show that placing the energy sources at the suggested optimal locations results in significant power gain compared to non-optimal placements.
本文提出了一种利用专用机载射频(RF)能量源的无线电力传输为无人机(uav)携带的飞行基站充电的新方法。特别是,我们研究了一种系统,其中无人机接收无线电源而不受其常规轨迹的干扰。研究了能量源的最佳布置,使接收无人机在一个正方形区域上以线性轨迹飞行时,能最大限度地从能量源接收功率。我们发现,对于两架无人机的研究场景,如果使用偶数个能量源,将它们放置在最优位置可使总接收功率最大化,同时实现无人机之间的公平性。然而,在使用奇数个能源的情况下,我们可以最大化接收到的总功率,或者实现公平,但不能同时实现两者。数值结果表明,与非最佳位置相比,将能源放置在建议的最佳位置可以获得显着的功率增益。
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引用次数: 12
Low-Complexity Iterative Receiver for Orthogonal Chirp Division Multiplexing 正交调频分复用低复杂度迭代接收机
Pub Date : 2019-03-19 DOI: 10.1109/WCNCW.2019.8902857
Roberto Bomfin, Marwa Chafii, G. Fettweis
This paper proposes a low-complexity iterative receiver for the recently proposed Orthogonal Chirp Division Multiplexing (OCDM) modulation scheme, where we consider a system under frequency-selective channels and constrained to channel state information availability only at the receiver. It has been shown that under these assumptions, OCDM becomes an optimal waveform in terms of performance, i.e., frame error rate (FER), when employing a receiver capable of achieving perfect feedback equalizer (PFE) performance. Thus, this work targets proposing such a receiver for OCDM with low-complexity. Our approach is based on the well accepted minimum mean squared error with parallel interference cancellation (MMSE-PIC), where we derive an approximated equalizer whose complexity is reduced to two fast Fourier transforms (FFTs) per iteration. The FER results reveal that i) the proposed low-complexity receiver performs as good as the original MMSE-PIC, ii) OCDM performs very closely to PFE, and iii) OCDM has approximately 2 dB improvement over OFDM.
本文针对最近提出的正交调频分复用(OCDM)调制方案,提出了一种低复杂度的迭代接收机,其中我们考虑了频率选择信道下的系统,并且仅在接收机处受信道状态信息可用性的约束。已经证明,在这些假设下,当采用能够实现完美反馈均衡器(PFE)性能的接收器时,OCDM在性能方面成为最优波形,即帧错误率(FER)。因此,本工作的目标是提出这样一个低复杂度的OCDM接收器。我们的方法基于公认的最小均方误差并行干扰抵消(MMSE-PIC),其中我们推导出一个近似均衡器,其复杂性降低到每次迭代的两个快速傅里叶变换(fft)。FER结果表明,i)所提出的低复杂度接收器的性能与原始MMSE-PIC一样好,ii) OCDM的性能非常接近PFE, iii) OCDM比OFDM提高了约2db。
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引用次数: 22
On the Resource Utilization of Multi-Connectivity Transmission for URLLC Services in 5G New Radio 5G新无线电URLLC业务多连接传输资源利用研究
Pub Date : 2019-03-13 DOI: 10.1109/WCNCW.2019.8902865
N. Mahmood, A. Karimi, Gilberto Berardinelli, K. Pedersen, D. Laselva
Multi-connectivity with packet duplication, where the same data packet is duplicated and transmitted from multiple transmitters, is proposed in 5G New Radio as a reliability enhancement feature. This paper presents an analytical study of the outage probability enhancement with multi-connectivity, and analyses its cost in terms of resource usage. The performance analysis is further compared against conventional single-connectivity transmission. Our analysis shows that, for transmission with a given block error rate target, multi-connectivity results in more than an order of magnitude outage probability improvement over the baseline single-connectivity scheme. However, such gains are achieved at the cost of almost doubling the amount of radio resources used. Multi-connectivity should thus be selectively used such that its benefits can be harnessed for critical users, while the price to pay in terms of resource utilization is simultaneously minimized.
在5G新无线电中提出了具有分组复制的多连接,其中相同的数据包被复制并从多个发射器传输,作为可靠性增强功能。本文对多连通性下的中断概率增强进行了分析研究,并从资源使用的角度分析了其成本。性能分析进一步与传统的单连接传输进行了比较。我们的分析表明,对于具有给定块错误率目标的传输,与基线单连接方案相比,多连接可使中断概率提高一个数量级以上。然而,取得这些成果的代价是所使用的无线电资源几乎增加了一倍。因此,应该有选择地使用多重连接,以便为关键用户提供好处,同时尽量减少在资源利用方面付出的代价。
{"title":"On the Resource Utilization of Multi-Connectivity Transmission for URLLC Services in 5G New Radio","authors":"N. Mahmood, A. Karimi, Gilberto Berardinelli, K. Pedersen, D. Laselva","doi":"10.1109/WCNCW.2019.8902865","DOIUrl":"https://doi.org/10.1109/WCNCW.2019.8902865","url":null,"abstract":"Multi-connectivity with packet duplication, where the same data packet is duplicated and transmitted from multiple transmitters, is proposed in 5G New Radio as a reliability enhancement feature. This paper presents an analytical study of the outage probability enhancement with multi-connectivity, and analyses its cost in terms of resource usage. The performance analysis is further compared against conventional single-connectivity transmission. Our analysis shows that, for transmission with a given block error rate target, multi-connectivity results in more than an order of magnitude outage probability improvement over the baseline single-connectivity scheme. However, such gains are achieved at the cost of almost doubling the amount of radio resources used. Multi-connectivity should thus be selectively used such that its benefits can be harnessed for critical users, while the price to pay in terms of resource utilization is simultaneously minimized.","PeriodicalId":121352,"journal":{"name":"2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131826645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Effect of Mutual Coupling on the Performance of STCM-MIMO Systems 互耦合对STCM-MIMO系统性能的影响
Pub Date : 2019-03-10 DOI: 10.1109/WCNCW.2019.8902766
Fatemeh Asghari Azhiri, R. Abdolee, B. M. Tazehkand
Space-time coded massive (STCM) multiple-input multiple-output (MIMO) system provides superior bit error rate (BER) performance compared with the conventional space-time coding and massive MIMO techniques. The transmitter of the STCM-MIMO system consists of a large antenna array. In a practical system, the self-interference created by the signals transmitted by the elements of this antenna array, known as mutual coupling (MC), degrades the performance of the system. The MC effect is pronounced in communication systems with a large antenna array. On the other hand, increasing the number of transmitting antennas results in improved BER performance. Hence, there is a trade off in selecting the optimum number of transmitting antennas in an STCM-MIMO system. In order to take the impact of MC into account, we have derived an analytical expression for the received signal to accurately model the STCM-MIMO system under the existence of the MC effect. We present an algorithm to select the optimal number of antennas to minimize mutual coupling and the system bit error rate (BER). Through computer simulations, we investigate the BER performance of the STCM-MIMO system for different numbers of array elements.
空时编码海量(STCM)多输入多输出(MIMO)系统与传统的空时编码和海量MIMO技术相比,具有更好的误码率性能。STCM-MIMO系统的发射机由一个大型天线阵列组成。在实际系统中,这种天线阵列的元件所传输的信号所产生的自干扰,即互耦(MC),会降低系统的性能。在具有大型天线阵的通信系统中,MC效应非常明显。另一方面,增加发射天线的数量可以提高误码率性能。因此,在STCM-MIMO系统中选择最佳发射天线数量需要权衡。为了考虑MC的影响,我们推导了接收信号的解析表达式,以准确地模拟存在MC效应下的STCM-MIMO系统。提出了一种选择最佳天线数的算法,以最小化互耦和系统误码率(BER)。通过计算机仿真,研究了不同阵列元数下STCM-MIMO系统的误码率性能。
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引用次数: 4
Flexible MEC service consumption through edge host zoning in 5G networks 在5G网络中,通过边缘主机分区实现灵活的MEC业务消耗
Pub Date : 2019-03-05 DOI: 10.1109/WCNCW.2019.8902852
Miltiades Filippou, D. Sabella, Vincenzo Riccobene
Multi-access Edge Computing (MEC) is commonly recognized as a key supporting technology for the emerging 5G systems. When deployed in fully virtualized networks, i.e., following the Network Function Virtualization (NFV) paradigm, it will enable a multitude of new applications and use cases. However, the growing number of devices, combined with the vastly increasing traffic demand, call for low End-to-End (E2E) latency packet transfer and processing in an NFV environment, both in user and control plane. In this paper, focusing on control plane packet traffic, we investigate the general case of a MEC application consuming a MEC service running on a different MEC host. To enable flexible MEC platform service consumption at different localities, based on a state-of-the-art statistical model of the total processing time, we define latency-aware proximity zones around MEC servers hosting MEC application instances. Exemplary scenarios exhibit the E2E performance benefit of introducing the awareness of proximity zones around MEC hosts and service producing MEC application instances. This performance-aware service consumption will be beneficial in view of the future evolution towards distributed computing systems.
多接入边缘计算(MEC)被普遍认为是新兴5G系统的关键支撑技术。当部署在完全虚拟化的网络中,即遵循网络功能虚拟化(NFV)范式时,它将启用大量新的应用程序和用例。然而,随着设备数量的不断增加,加上流量需求的急剧增长,NFV环境需要低端到端(E2E)延迟的数据包传输和处理,无论是在用户面还是控制面。本文以控制平面数据包流量为重点,研究了MEC应用程序使用运行在不同MEC主机上的MEC服务的一般情况。为了在不同位置实现灵活的MEC平台服务消费,基于最先进的总处理时间统计模型,我们在托管MEC应用程序实例的MEC服务器周围定义了延迟感知邻近区域。示例场景展示了通过在MEC主机和服务生成MEC应用程序实例周围引入邻近区域的感知,从而获得的端到端性能优势。考虑到分布式计算系统的未来发展,这种对性能敏感的服务消费将是有益的。
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引用次数: 12
期刊
2019 IEEE Wireless Communications and Networking Conference Workshop (WCNCW)
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