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2017 IEEE International Conference on Communications (ICC)最新文献

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On scalability and interference avoidance in nonlinear adjacent channel interference networks 非线性相邻信道干扰网络的可扩展性与干扰避免
Pub Date : 2017-05-21 DOI: 10.1109/ICC.2017.7996998
Aditya V. Padaki, R. Tandon, Jeffrey H. Reed
Adjacent channel interference caused by intermodulation distortion adversely affects the network operations in next generation heterogeneous and dynamic spectrum access networks. Multitudes of radio access technologies make the receivers susceptible to harmful interference due to nonlinear RF front ends. In this paper we analyze the intermodulation distortion arising from pairwise interactions of adjacent channel signals from a spectrum centric point of view and develop frameworks to ascertain the adjacent channel signals causing interference at a given desired channel. We further propose achievable schemes for interference avoidance and assess the scalability of the next generation Nonlinear Adjacent Channel Interference Networks. We further propose schemes for complete interference protection of incumbents with sensitive receiver requirements from secondary operations in adjacent channels in the spatio-temporal vicinity. This paper presents valuable insights on scalability and schemes for nonlinear adjacent channel interference avoidance in next generation shared spectrum networks.
在下一代异构和动态频谱接入网中,由互调失真引起的相邻信道干扰会对网络运行产生不利影响。多种无线接入技术由于射频前端的非线性,使得接收机容易受到有害干扰。在本文中,我们从频谱中心的角度分析了由相邻信道信号的配对相互作用引起的互调失真,并开发了框架来确定在给定的期望信道上引起干扰的相邻信道信号。我们进一步提出了可实现的干扰避免方案,并评估了下一代非线性相邻信道干扰网络的可扩展性。我们进一步提出了在时空附近的相邻信道中对具有敏感接收机需求的在位者进行二次操作的完全干扰保护的方案。本文对下一代共享频谱网络中非线性相邻信道干扰避免的可扩展性和方案提出了有价值的见解。
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引用次数: 3
Performance evaluation of LoRa networks in a smart city scenario 智慧城市场景下LoRa网络性能评估
Pub Date : 2017-05-21 DOI: 10.1109/ICC.2017.7996384
D. Magrin, Marco Centenaro, L. Vangelista
Low-Power Wide Area Networks (LPWANs) are continuously gaining momentum as fundamental enablers of the Internet of Things (IoT) paradigm. These networks provide longrange coverage to end nodes, exploiting license-free frequency bands. The focus of this work is on one of the most prominent LPWAN technologies: LoRa™. We implemented a new ns-3 module to study the performance of a LoRa-based IoT network in a typical urban scenario. Simulation results show that a LoRa network can scale well, achieving packet success rates above 95% in presence of a number of end devices in the order of 104.
低功耗广域网(lpwan)作为物联网(IoT)范式的基本推动者不断获得动力。这些网络利用免许可证的频段,为终端节点提供远距离覆盖。这项工作的重点是最突出的LPWAN技术之一:LoRa™。我们实现了一个新的ns-3模块来研究典型城市场景中基于lora的物联网网络的性能。仿真结果表明,LoRa网络具有良好的可扩展性,在终端设备数量为104的情况下,分组成功率在95%以上。
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引用次数: 280
Bridging the gap between big data and game theory: A general hierarchical pricing framework 弥合大数据和博弈论之间的差距:一个通用的分层定价框架
Pub Date : 2017-05-21 DOI: 10.1109/ICC.2017.7996334
Zijie Zheng, Lingyang Song, Zhu Han
In this paper, we propose a general pricing framework, helping the controller promote agents to achieve its objective, for a big data network with one controller and a large number of agents. The convergence of the framework is guaranteed for a general class of objective functions: a separable convex function for the controller and a convex function for each agent. Specially, the proposed framework can converge linearly, when the controller's objective is strongly convex, and the agents' objectives have a uniform Lipschitz gradient. The convergence, and especially the linear convergence is not dependent on the number of agents, which is important for a network with large size. Through numerical results, we apply our pricing framework in a wireless virtualized network to verify its fast convergence, where the pricing framework converges after just a few steps.
本文针对一个控制器和大量代理的大数据网络,提出了一个通用的定价框架,帮助控制器促进代理实现其目标。对于一类一般的目标函数:控制器的可分离凸函数和每个代理的凸函数,保证了框架的收敛性。特别地,当控制器的目标是强凸且智能体的目标具有一致的Lipschitz梯度时,该框架可以线性收敛。网络的收敛性,特别是线性收敛性不依赖于智能体的数量,这对于一个大网络是很重要的。通过数值结果,我们将该定价框架应用于无线虚拟化网络,验证了其快速收敛性,其中定价框架只需几步即可收敛。
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引用次数: 5
Training-based synchronization for quantity-based modulation in inverse Gaussian channels 反高斯信道中基于数量调制的基于训练的同步
Pub Date : 2017-05-21 DOI: 10.1109/ICC.2017.7996905
B. Hsu, Po-Chun Chou, Chia-han Lee, Ping-Cheng Yeh
In time-slotted molecular communication systems, clock synchronization between transmitter and receiver is crucial. In this paper, training-based synchronization schemes in a molecular communication system with quantity-based modulation are proposed by utilizing the information of arrival times of molecules. For timing offset estimation, three estimators are proposed, including maximum likelihood estimation (MLE), unbiased linear estimation (ULE), and iterative ULE. For clock skew estimation, two algorithms, arithmetic mean estimation and weighted mean estimation, are proposed. Simulation results demonstrate that the proposed estimators are effective.
在时隙分子通信系统中,发送端和接收端之间的时钟同步至关重要。本文利用分子到达时间信息,提出了基于训练的量调制分子通信系统同步方案。对于时间偏移估计,提出了三种估计方法:极大似然估计(MLE)、无偏线性估计(ULE)和迭代估计(ULE)。对于时钟偏差估计,提出了算术平均估计和加权平均估计两种算法。仿真结果表明,该估计方法是有效的。
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引用次数: 9
Sampling-based tracking of time-varying channels for millimeter wave-band communications 基于采样的毫米波波段时变信道跟踪
Pub Date : 2017-05-21 DOI: 10.1109/ICC.2017.7996518
J. Yoo, Jisu Bae, Sun Hong Lim, Sunwoo Kim, J. Choi, B. Shim
In this paper, we propose a new recursive sparse channel recovery algorithm which can track time-varying support of angular domain channel response vector in mobility scenario for millimeter wave-band communications. We model the angle of departure (AoD) and the angle of arrival (AoA) using discrete state Markov random process and derive joint estimation of the time-varying support and amplitude of the angular domain channel vector. Using sequential Monte Carlo (SMC) method, the proposed channel estimation scheme tracks the support by drawing the samples from a posteriori distribution of the support indices while capturing the dynamics of time-varying amplitude using Kalman filter. Our simulation results show that the proposed algorithm yields significantly better tracking performance than the existing compressed sensing schemes.
本文提出了一种新的递归稀疏信道恢复算法,该算法可以跟踪毫米波移动场景下角域信道响应向量的时变支持度。利用离散状态马尔可夫随机过程对出发角和到达角进行建模,推导出角域信道矢量时变支持度和幅值的联合估计。该信道估计方案采用时序蒙特卡罗(SMC)方法,通过从支持指数的后检分布中提取样本来跟踪支持,同时利用卡尔曼滤波捕捉时变振幅的动态变化。仿真结果表明,该算法的跟踪性能明显优于现有的压缩感知算法。
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引用次数: 10
A hierarchical approach for the selection of optical ground stations maximizing the data transfer from low-earth observation satellites 利用近地观测卫星数据传输最大化的光学地面站分层选择方法
Pub Date : 2017-05-21 DOI: 10.1109/ICC.2017.7996550
Mikael Capelle, Marie-José Huguet, Nicolas Jozefowiez, X. Olive
For space industries, free-space optical communications are becoming a mature technology, but the impact of their use to download observations from spatial imagery systems has still to be evaluated. Unlike current radio-frequency technology, freespace optical communications are strongly impacted by weather conditions, and most notably by clouds. In order to cope with the later, it is necessary to achieve ground station diversity, i.e. having a network of optical ground stations able to receive data from satellites. In this paper, we aim to find a subset of a given number of ground stations maximizing the amount of data that can be downloaded from a low-earth orbiting satellite to the Earth during its missions. We present a Mixed Integer Linear Program model and a hierarchical method based on an exhaustive enumeration of the sets of stations and on a dynamic programming algorithm to solve it. The efficiency of this method is evaluated on several instances based on real ground station networks and on cloud cover throughout the last twenty years.
对于空间工业来说,自由空间光通信正在成为一项成熟的技术,但是它们用于从空间成像系统下载观测结果的影响仍有待评估。与当前的射频技术不同,自由空间光通信受到天气条件的强烈影响,尤其是云层。为了应对后者,有必要实现地面站分集,即拥有一个能够接收卫星数据的光学地面站网络。在本文中,我们的目标是找到给定数量的地面站的一个子集,使其在执行任务期间可以从低地球轨道卫星下载到地球的数据量最大化。本文提出了一个混合整数线性规划模型和一种基于站集穷举和动态规划算法的分层求解方法。在近二十年来基于实际地面站网络和云量的若干实例中,对该方法的有效性进行了评价。
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引用次数: 4
Fundamental limits on latency in cloud- and cache-aided HetNets 在云和缓存辅助的HetNets中延迟的基本限制
Pub Date : 2017-05-21 DOI: 10.1109/ICC.2017.7996346
Jaber Kakar, S. Gherekhloo, Z. Awan, A. Sezgin
Hybrid architectures are generally composed of a cyber cloud with additional support of edge caching. By utilizing the benefits associated with cloud computing and caching, powerful enhanced interference management techniques can be readily utilized — that among others — also results in low-latency transmission. In this paper, we study the impact of cloud and edge processing on the latency for a heterogenous network (HetNet) consisting of two users and two transmitters. We define an information-theoretic metric, the delivery time per bit (DTB), that captures the delivery latency. We establish bounds on the DTB as a function of cache size, backhaul capacity and wireless channel parameters. We show the optimality on the DTB for various channel regimes.
混合架构通常由支持边缘缓存的网络云组成。通过利用与云计算和缓存相关的好处,可以很容易地利用强大的增强型干扰管理技术,从而实现低延迟传输。在本文中,我们研究了云和边缘处理对由两个用户和两个发射器组成的异构网络(HetNet)延迟的影响。我们定义了一个信息论度量,即每比特传递时间(DTB),它捕获了传递延迟。我们建立了DTB的边界作为缓存大小、回程容量和无线信道参数的函数。我们展示了各种信道体制下DTB的最优性。
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引用次数: 20
CryptMDB: A practical encrypted MongoDB over big data CryptMDB:一个实用的大数据加密MongoDB
Pub Date : 2017-05-21 DOI: 10.1109/ICC.2017.7997105
Guowen Xu, Yanzhi Ren, Hongwei Li, Dongxiao Liu, Yuan-Shun Dai, Kan Yang
In big data era, data are usually stored in databases for easy access and utilization, which are now woven into every aspect of our lives. However, traditional relational databases cannot address users' demands for quick data access and calculating, since they cannot process data in a distributed way. To tackle this problem, non-relational databases such as MongoDB have emerged up and been applied in various Scenarios. Nevertheless, it should be noted that most MongoDB products fail to consider user's data privacy. In this paper, we propose a practical encrypted MongoDB (i.e., CryptMDB). Specifically, we utilize an additive homomorphic asymmetric cryptosystem to encrypt user's data and achieve strong privacy protection. Security analysis indicates that the CryptMDB can achieve confidentiality of user's data and prevent adversaries from illegally gaining access to the database. Furthermore, extensive experiments demonstrate that the CryptMDB achieves better efficiency than existing relational database in terms of data access and calculating.
在大数据时代,数据通常存储在数据库中,方便访问和利用,现在已经融入我们生活的方方面面。然而,传统的关系数据库无法以分布式的方式处理数据,无法满足用户对数据快速访问和计算的需求。为了解决这个问题,出现了MongoDB等非关系数据库,并应用于各种场景。然而,需要注意的是,大多数MongoDB产品都没有考虑到用户的数据隐私。在本文中,我们提出了一个实用的加密MongoDB(即CryptMDB)。具体来说,我们利用加性同态非对称密码系统对用户数据进行加密,实现了强大的隐私保护。安全性分析表明,CryptMDB可以实现用户数据的保密性,防止攻击者非法访问数据库。此外,大量的实验表明,在数据访问和计算方面,CryptMDB比现有的关系数据库具有更高的效率。
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引用次数: 17
Throughput maximization and resource optimization in NFV-enabled networks nfv网络中的吞吐量最大化和资源优化
Pub Date : 2017-05-21 DOI: 10.1109/ICC.2017.7996514
Zichuan Xu, W. Liang, A. Galis, Yu Ma
Network function virtualization (NFV) has been emerging as a new paradigm to enable elastic and inexpensive network services in modern computer networks, through deploying flexible virtualized network functions (VNFs) running in virtual computing platforms. Different VNFs can be chained together to form different service chains, to meet various user data routing demands for different network services. In this paper we consider provisioning network services in an NFV-enabled network that consists of data centers for implementing VNF instances of service chains and switches. We study the throughput maximization problem with the aim to admit as many user requests as possible while minimizing the implementation cost of the requests, assuming that limited numbers of instances of each service chain have been stored in data centers. We first propose an optimal algorithm for the problem if all requests have identical packet rates; otherwise, we devise two approximation algorithms with probable approximation ratios, depending on whether the packet traffic of each request is splittable. We finally conduct experiments to evaluate the performance of the proposed algorithms by simulations. Experimental results show that the proposed algorithms achieve at least 15% more throughput than that of a greedy algorithm.
网络功能虚拟化(NFV)通过在虚拟计算平台上部署灵活的虚拟网络功能(VNFs),成为在现代计算机网络中实现弹性和廉价网络服务的新范例。可以将不同的VNFs链接在一起,形成不同的服务链,以满足不同网络业务的各种用户数据路由需求。在本文中,我们考虑在支持nfv的网络中提供网络服务,该网络由数据中心组成,用于实现服务链和交换机的VNF实例。假设每个服务链在数据中心中存储的实例数量有限,我们研究吞吐量最大化问题的目的是在允许尽可能多的用户请求的同时最小化请求的实现成本。我们首先提出了一个最优算法,如果所有请求具有相同的数据包速率;另外,根据每个请求的数据包流量是否可分割,我们设计了两种具有可能近似比率的近似算法。最后,我们进行了实验,通过模拟来评估所提出算法的性能。实验结果表明,该算法的吞吐量比贪婪算法至少提高15%。
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引用次数: 28
Matching game approach for charging scheduling in vehicle-to-grid networks 车网充电调度的匹配博弈方法
Pub Date : 2017-05-21 DOI: 10.1109/ICC.2017.7997149
Guanhua Qiao, S. Leng, M. Zeng, Yan Zhang
This paper study a new paradigm of heterogeneous charging stations (CSs) for the excellent charging services of Electric Vehicles (EVs) in a dense urban environment. When a large number of EVs are driving on the roads, their travel demands and charging activities have significant impact on the charging management of multiple CSs including large-CSs (LCSs) and small-CSs (SCSs). The problem of charging scheduling can be formulated as a two-side Hospital/Residents (HR) matching game. In this matching game, we not only consider the economic interest of multiple CSs and charging experience of EVs but also utilize the natural advantages of SCSs to balance the traffic on the roads around LCSs. Furthermore, a two-stage scheme that is composed of distributed HR admission scheme and centralized HR reassignment scheme is proposed to reduce the computational complexity of the matching process. Simulation results indicate that the proposed algorithms can effectively offer the scheduling management among multiple CSs while providing good satisfaction to EV drivers.
本文研究了在人口密集的城市环境中为电动汽车提供优质充电服务的异构充电站的新模式。当大量电动汽车在道路上行驶时,其出行需求和充电活动对包括大型和小型云存储系统在内的多个云存储系统的充电管理产生重大影响。收费调度问题可以表述为一个双方医院/居民(HR)匹配博弈。在此匹配博弈中,我们既考虑了多个CSs的经济利益和电动汽车的充电体验,又利用了CSs的天然优势来平衡lcs周围道路的交通。此外,为了降低匹配过程的计算复杂度,提出了一种由分布式人力资源准入和集中式人力资源重新分配两阶段方案。仿真结果表明,该算法能够在满足电动汽车驾驶员需求的同时,有效地实现多个CSs之间的调度管理。
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引用次数: 6
期刊
2017 IEEE International Conference on Communications (ICC)
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