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2015 IEEE International Conference on Advanced Networks and Telecommuncations Systems (ANTS)最新文献

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MCRB for synchronization parameters offset in the presence of self-phase modulation in coherent optical communication 相干光通信中存在自相位调制时同步参数偏移的MCRB
D. Sen
In this paper we derive the Modified Cramér-Rao Bound (MCRB) for symbol timing, phase and frequency offset in presence of non-linear self-phase modulation (SPM) in a dispersion compensated long-haul coherent fiber link. We consider dual polarization multilevel quadrature amplitude modulation and multiple span of fiber each associated with optical amplifier. In presence of a realistic low pass filter (LPF) at the receiver front end, we find that SPM degrades the MCRB significantly. Moreover, SPM induces underdamped oscillation on the bounds. Simulation is carried out with self-generated asymmetric pulse to verify the theoretical results.
本文推导了色散补偿长途相干光纤链路中存在非线性自相位调制(SPM)时的符号定时、相位和频率偏移的修正cram - rao界(MCRB)。我们考虑了双偏振、多电平正交调幅和光纤的多跨度,并分别与光放大器相关联。在接收机前端存在一个现实的低通滤波器(LPF)时,我们发现SPM显著地降低了MCRB。此外,SPM在边界上引起欠阻尼振荡。利用自生成的非对称脉冲进行了仿真,验证了理论结果。
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引用次数: 1
An improved numerical optimization method for efficient beam search in 60 GHz indoor millimeter wave wireless networks 60 GHz室内毫米波无线网络高效波束搜索的改进数值优化方法
Shajahan Kutty, D. Sen
Directional communication is a key element in the sustenance of high data rate links in millimeter wave communications, and can be realized using antenna beamforming. To reduce training overhead and establish a reliable link in indoor millimeter wave communications, the beam switching technique is adopted with an objective to identify the optimal transmit-receive beam pair that maximizes the signal-to-noise ratio. Numerical optimization techniques based on direct search further seek to reduce the search complexity. The existing methods explored in literature work effectively for relatively smooth objective functions. However, indoor millimeter wave channels are typically characterized by non-smooth complicated objective functions. In this paper we propose a numerical search algorithm based on the Rosenbrock's direct search technique applicable for 60 GHz indoor millimeter wave systems. The proposed method is shown to yield an improved search success percentage during the beam search procedure without affecting the search complexity as compared to state-of-the-art techniques.
定向通信是毫米波通信中维持高数据速率链路的关键因素,可以通过天线波束形成来实现。为了减少训练开销,建立可靠的室内毫米波通信链路,采用波束交换技术,以确定最大信噪比的最佳收发波束对为目标。基于直接搜索的数值优化技术进一步降低了搜索复杂度。文献中探索的现有方法对于相对光滑的目标函数是有效的。然而,室内毫米波信道具有非光滑复杂目标函数的特点。本文提出了一种适用于60ghz室内毫米波系统的基于Rosenbrock直接搜索技术的数值搜索算法。与目前的技术相比,所提出的方法在波束搜索过程中产生了更高的搜索成功率,而不影响搜索复杂度。
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引用次数: 7
Behavioral epidemic analysis on Random Graph model for smart wireless networks 基于随机图模型的智能无线网络行为流行分析
Rohit Singh, H. Jamadagni
In distributed wireless networks, nodes are expected to spend their own resources so as to relay other nodes messages. This setup is governed by the trade-off between connectivity across the network and minimum interference, which maps to the standard Random Geometric Graph model. Even though smart network helps here, problem is that cognitive nodes may violate rules of cooperation with selfish intention of reaping the benefits from other nodes without bearing its cost. This leads to a behavioral epidemic causing nodes to follow non-cooperative strategy bringing down the network performance. In this paper, we examine the optimal way to choose control nodes using a central coordinator. We show by analysis that contrary to the general intuition, there exists a range of interest where random selection of control nodes outperforms that by highest degree ordering for the number of control nodes. We then simulate the mechanisms of inspections and counter-epidemic for these two control node selection procedures and verify the result.
在分布式无线网络中,节点需要花费自己的资源来转发其他节点的消息。这种设置是由跨网络的连接性和最小干扰之间的权衡所控制的,这映射到标准的随机几何图模型。尽管智能网络在这方面有所帮助,但问题是,认知节点可能会违反合作规则,自私地从其他节点获取利益,而不承担其成本。这导致了一种行为流行病,导致节点遵循非合作策略,从而降低了网络性能。在本文中,我们研究了使用中心协调器选择控制节点的最佳方法。我们通过分析表明,与一般的直觉相反,存在一个兴趣范围,其中随机选择控制节点优于控制节点数量的最高程度排序。然后,我们对这两个控制节点选择程序的检查和反流行机制进行了模拟,并验证了结果。
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引用次数: 1
On service chaining using Virtual Network Functions in Network-enabled Cloud systems 在支持网络的云系统中使用虚拟网络功能的服务链
Abhishek K. Gupta, M. F. Habib, P. Chowdhury, M. Tornatore, B. Mukherjee
Network functions (e.g., firewalls, load balancers, etc.) are traditionally implemented in hardware appliances and provide services to traffic flows. Since these functions are traditionally hardware-based, they make service innovation difficult in today's scenario of rapidly-increasing and evolving service demands. Network Function Virtualization (NFV) is seen as a key enabler for service innovation as it virtualizes these network functions that can be therefore located more flexibly in the network. In this paper, we analyze network resource consumption in a Network-enabled Cloud (NeC) where the cloud-computing paradigm also comprises of network nodes in addition to the data center, by employing service chaining of Virtual Network Functions (VNF). Using an Integer Linear Program formulation, we study different NeC scenarios having varying number of network nodes. Our results indicate that scenarios with distributed NFV capability (as in NeC) can reduce network resource consumption.
网络功能(如防火墙、负载平衡器等)传统上是在硬件设备中实现的,并为通信流提供服务。由于这些功能传统上是基于硬件的,因此在当今快速增长和演变的服务需求场景中,它们使服务创新变得困难。网络功能虚拟化(NFV)被视为服务创新的关键推动者,因为它将这些网络功能虚拟化,从而可以更灵活地定位在网络中。在本文中,我们通过使用虚拟网络功能(VNF)的服务链,分析了网络支持云(NeC)中的网络资源消耗,其中云计算范式除了数据中心之外还包括网络节点。使用整数线性规划公式,我们研究了具有不同数量网络节点的不同NeC场景。我们的研究结果表明,具有分布式NFV功能的场景(如NeC)可以减少网络资源消耗。
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引用次数: 28
Queuing model-based optimal traffic flow in a grid network 基于排队模型的网格网络最优交通流
Sayan Sen Sarma, G. Chakraborty
A transportation network describes a network structure to allow flow of some commodity. Flow maximization is a classical problem in this domain. In this paper, we address the problem of flow maximization in a transportation network with fix sources and a fixed sink. For simplicity to find an analytical solution, we start with a grid structured road network. The goal is to find a traffic distribution over the road network such that the total average time of travel from source to sink is minimized. The theoretical result obtained was verified using linear programming problem solving tool in MATLAB.
运输网络描述了允许某些商品流动的网络结构。流量最大化是该领域的经典问题。本文研究了具有固定源和固定汇的运输网络中的流量最大化问题。为了简单地找到解析解,我们从网格结构的道路网络开始。目标是找到路网上的交通分布,使从源到汇的总平均旅行时间最小化。利用MATLAB中的线性规划问题求解工具对理论结果进行了验证。
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引用次数: 5
LTE - Wi-Fi coexistence in 5 GHz band LTE - Wi-Fi共存于5ghz频段
V. Janardhanan, Nishad Muhammed, V. Gonuguntla, N. Akhtar
The proliferation of smart phones combined with increasing mobile data demand, cellular network operators around the world are considering various ways to augment network capacity. To meet the projected 1000x increase capacity by 2020 [3], a holistic approach is needed. The proposed solutions include hyper-dense small cell deployment, intelligent utilization of existing spectrum and offloading to other networks like Wi-Fi. Extending the LTE-Advanced (LTE-A) to unlicensed spectrum is a new approach being considered by the global standards body 3GPP, as part of LTE Release-13. The feasibility of LTE operation in 5 GHz band, also known as Licensed Assisted Access (LAA), is being studied. The main challenge is to ensure LTE do not affect the performance of existing technologies/systems in this band such as Wi-Fi, Radar etc. In this paper, we provide simulation study on LTE - Wi-Fi coexistence in the unlicensed spectrum.
随着智能手机的普及和移动数据需求的增加,世界各地的蜂窝网络运营商都在考虑各种增加网络容量的方法。为了满足预计到2020年将增加1000倍的容量,需要采取全面的方法。提出的解决方案包括超密集小型蜂窝部署、现有频谱的智能利用以及卸载到Wi-Fi等其他网络。将LTE- advanced (LTE- a)扩展到非授权频谱是全球标准机构3GPP正在考虑的一种新方法,作为LTE Release-13的一部分。LTE在5ghz频段运行的可行性,也被称为许可辅助接入(LAA),目前正在研究中。主要的挑战是确保LTE不会影响该频段现有技术/系统的性能,如Wi-Fi、Radar等。本文对LTE - Wi-Fi在无许可频谱下的共存进行了仿真研究。
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引用次数: 4
Mechanism for adaptive and context-aware inter-IoT communication 自适应和上下文感知的物联网间通信机制
Sudipta Ghosh, S. Seetharaman
The expected proliferation of massive number of connected devices in the Internet of Things (IoT) context imposes several challenges and constraints to inter & intra IoT communication. Current mechanism has limited capability for handling a number of aspects associated with this exponential rise in connected devices, types and functions of IoT networks, and availability of heterogeneous modes of communications. Such aspects include network & device specific identity and session maintenance, context-aware and adaptive communication, security needs, reliability and criticality of communication, etc. To address some of these challenges, we present a novel approach for adaptive and context-aware inter-IoT communication across heterogeneous networks supporting IoT service requirements and mobility.
物联网(IoT)环境中大量连接设备的预期激增给物联网内部和内部通信带来了一些挑战和限制。目前的机制在处理与连接设备、物联网网络的类型和功能以及异构通信模式的可用性指数增长相关的许多方面的能力有限。这些方面包括网络和设备特定的身份和会话维护、上下文感知和自适应通信、安全需求、通信的可靠性和关键性等。为了解决其中的一些挑战,我们提出了一种新的方法,用于跨异构网络的自适应和上下文感知的物联网间通信,支持物联网服务需求和移动性。
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引用次数: 3
Characterization of Traffic Analysis based video stream source identification 基于流量分析的视频流源识别特性研究
Yan Shi, S. Biswas
This paper presents the concept and characterization of Traffic Analysis (TA) for identifying sources of tunneled video streaming traffic. Such identification can be used in enterprise firewalls for blocking unauthorized viewing of tunneled video. We attempt to characterize and evaluate the impacts of the primary TA-influencing factors, namely, streaming protocol, codec, and the actual video content. A test environment is built to study the influence of those factors while Packet Size Distribution is used as the classification feature during Traffic Analysis. Analysis done on data obtained from the test environment has shown that the streaming protocols provide the most dominant source identification distinction. Also, while the codecs provide some weak distinctions, the influence of video content is marginal. In addition to in-laboratory experiments, a real-world verification for corroborating those observations is also made with commercial streaming service providers. Such long-haul experiments indicate that the end-to-end network conditions between the streaming server and video client can act as an additional influencing factor for traffic analysis towards video stream source identification. Overall, the results suggest the feasibility of TA for unknown video stream source identification with sufficiently diverse video examples.
本文介绍了用于识别隧道视频流流量来源的流量分析(TA)的概念和特征。这种识别可以用于企业防火墙,以阻止未经授权的隧道视频观看。我们试图描述和评估主要ta影响因素的影响,即流媒体协议、编解码器和实际视频内容。在流量分析中采用分组大小分布作为分类特征,建立测试环境研究这些因素的影响。对测试环境中获得的数据进行的分析表明,流协议提供了最主要的源识别区别。此外,虽然编解码器提供了一些微弱的区别,但视频内容的影响是微不足道的。除了实验室实验外,还与商业流媒体服务提供商进行了真实世界的验证,以证实这些观察结果。这样的长途实验表明,流服务器和视频客户端之间的端到端网络条件可以作为流量分析对视频流源识别的额外影响因素。总的来说,结果表明,在充分多样化的视频示例中,TA对未知视频流源识别是可行的。
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引用次数: 9
Benefits of sliceable photonic based transponders in metro networks 城域网络中可切片光子应答器的优点
Sourav Das, O. Turkcu, A. Malik, Pravin Mahajan, Biao Lu
In this paper, we analyze benefits of sliceable photonics based transponders (line modules) compared to designs with discrete optics transponder based solutions (CFP/CFP2 - C form-factor pluggable) in Metro Network. The parameters considered are the cost in terms of number of transponders and power utilization. We assume OTN based network with QPSK and 16QAM modulation schemes for the both. We observed that photonic integration based sliceable transponders (sliceable photonics) is much more advantageous than discrete transponder optics, both running with either QPSK or 16QAM modulation schemes. Finally, we compare the effect of modulation schemes on the efficiency of the network by comparing QPSK and 16QAM in discrete transponder optics and show that 16QAM in discrete transponder optics makes the network more inefficient.
在本文中,我们分析了基于可切片光子的转发器(线路模块)与基于离散光学转发器解决方案(CFP/CFP2 - C外形因子可插拔)的设计在城域网络中的优势。考虑的参数是按应答器数量和功率利用率计算的成本。我们假设基于OTN的网络采用QPSK和16QAM调制方案。我们观察到基于光子集成的可切片转发器(可切片光子学)比离散转发器光学更有优势,两者都运行在QPSK或16QAM调制方案下。最后,我们通过比较离散转发器光学中的QPSK和16QAM,比较了调制方案对网络效率的影响,表明16QAM使离散转发器光学中的网络效率更低。
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引用次数: 1
Game-theoretic green electric vehicle energy networks management in smart grid 智能电网中的博弈论绿色电动汽车能源网络管理
A. Mondal, S. Misra
In this paper, the problem of green electric vehicle energy networks management is studied using a non-cooperative Stackelberg game theoretic model. The micro-grid acts as the leader, and needs to decide the price per unit energy based on the amount of energy requested by the plug-in hybrid electric vehicles (PHEVs) for charging and the amount of energy to be requested to each PHEV for discharging, respectively. On the other hand, the PHEVs act as the followers, and need to decide the amount energy to be consumed and the price per unit energy for charging and discharging, respectively, in order to reduce CO2 emission, i.e., using green energy. Using the proposed electric vehicle energy networks management (EVENT) scheme, there exists Nash equilibrium solution for charging and discharging, and the satisfaction factors are high using proposed EVENT scheme.
本文采用非合作的Stackelberg博弈论模型研究了绿色电动汽车能源网络的管理问题。微电网作为领导者,需要根据插电式混合动力汽车(PHEV)充电所需的能量和每辆PHEV放电所需的能量分别确定单位能量价格。另一方面,插电式混合动力汽车作为追随者,需要分别决定充电和放电的能量消耗量和单位能量价格,以减少二氧化碳的排放,即使用绿色能源。采用本文提出的电动汽车能量网络管理(EVENT)方案,充放电存在纳什均衡解,且该方案具有较高的满意度。
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引用次数: 2
期刊
2015 IEEE International Conference on Advanced Networks and Telecommuncations Systems (ANTS)
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