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2022 IEEE 47th Conference on Local Computer Networks (LCN)最新文献

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Unobtrusive Mechanism Interception 非突兀机制拦截
Pub Date : 2022-09-26 DOI: 10.1109/LCN53696.2022.9843536
Patrick Lampe, Markus Sommer, Artur Sterz, Jonas Hochst, Christian Uhl, Bernd Freisleben
Networked systems and applications are often based on proprietary hardware/software components that manufacturers might not be willing to adapt or update if new requirements arise. We present mechanism interception, a novel approach to unobtrusively add or modify functionality to/of an existing networked system or application without touching any proprietary components. Behavioral changes are achieved by functionality-enhancing yet unobtrusive interceptors, i.e., components introduced between systems and their environments adding or updating mechanisms. We illustrate our approach by unobtrusively adding a vertical handover mechanism between Wi-Fi and LTE to a mobile end device without disconnecting TCP sessions. Our results indicate that mechanism interception is a compelling approach to achieve improved service quality and provide previously unavailable functionality.
网络系统和应用程序通常基于专有的硬件/软件组件,如果出现新的需求,制造商可能不愿意调整或更新这些组件。我们提出了机制拦截,这是一种新颖的方法,可以在不触及任何专有组件的情况下不显眼地向现有网络系统或应用程序添加或修改功能。行为改变是通过增强功能但不引人注目的拦截器实现的,例如,在系统及其环境之间引入的组件添加或更新机制。我们通过在移动终端设备上不引人注目地添加Wi-Fi和LTE之间的垂直切换机制来说明我们的方法,而不会断开TCP会话。我们的研究结果表明,机制拦截是一种引人注目的方法,可以提高服务质量并提供以前不可用的功能。
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引用次数: 1
Dynamic Ad Substitution in Hybrid Broadband Broadcast Environments 混合宽带广播环境中的动态广告替代
Pub Date : 2022-09-26 DOI: 10.1109/LCN53696.2022.9843406
R. Seeliger, Louay Bassbouss
Technology environments are fragmented, hybrid and broadcast merge along online and digital paths, orchestration and distribution of individual content streams are evolving rapidly; DAI, SSAI, CSAI, DAS, targeted advertising and addressable TV are terms with different techniques but at the same time often used for similar use cases. There are standards such as HbbTV and MPEG-DASH available, but they meet these requirements only partially and require enhancements before they can be adopted by the industry. While HbbTV 2.0.3 is the latest version of the specification, it still has limitations in providing a seamless and personalized ad experience across broadcast and broadband. This demo showcases a real world, deployed and almost product ready implementation of Dynamic Ad Substitution for HbbTV Versions 1.5 and 2.0.X showcasing the feasibility for individual content replacements via broadband in broadcast environments.
技术环境是碎片化的,混合的,并沿着在线和数字路径广播合并,单个内容流的编排和分发正在迅速发展;DAI, SSAI, CSAI, DAS,目标广告和可寻址电视是不同技术的术语,但同时经常用于类似的用例。目前已有HbbTV和MPEG-DASH等标准,但它们只能部分满足这些要求,而且在被行业采用之前还需要改进。虽然HbbTV 2.0.3是该规范的最新版本,但它在提供跨广播和宽带的无缝和个性化广告体验方面仍然存在局限性。这个演示展示了HbbTV 1.5和2.0版本的动态广告替代的真实世界,部署和几乎产品就绪的实现。X展示了在广播环境中通过宽带进行个人内容替换的可行性。
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引用次数: 0
Efficient Mobile Computation Offloading over a Finite-State Markovian Channel using Spectral State Aggregation 基于频谱状态聚合的有限状态马尔可夫信道的高效移动计算卸载
Pub Date : 2022-09-26 DOI: 10.1109/LCN53696.2022.9843606
P. Teymoori, A. Boukerche, Feng Liang
This paper considers the problem of mobile computation offloading under stochastic wireless channels while task completion times are subject to deadline constraints. Our objective is to conserve energy for the mobile device by making an optimal decision to execute the task either locally or remotely. In the case of computation offloading, we dynamically vary the data transmission rate, in response to channel conditions. The wireless transmission channel is modelled using a Finite-State Markov Chain (FSMC). We formulate the problem of computation offloading as a constrained optimization problem, and develop an online algorithm to derive the optimal offloading policy. Moreover, to reduce the complexity, we estimate a suboptimal solution of the proposed online algorithm by reducing the size of the FSMC with the help of Markovian aggregation. The numerical results indicate that by applying Markovian aggregation, the running time of the algorithm can be significantly reduced without suffering unreasonable performance degradation.
研究了随机无线信道下,任务完成时间受期限约束的移动计算卸载问题。我们的目标是通过做出本地或远程执行任务的最佳决策来为移动设备节省能量。在计算卸载的情况下,我们动态地改变数据传输速率,以响应信道条件。采用有限状态马尔可夫链(FSMC)对无线传输信道进行建模。我们将计算卸载问题表述为一个约束优化问题,并开发了一种在线算法来推导最优卸载策略。此外,为了降低复杂度,我们利用马尔可夫聚合方法减少FSMC的大小,估计出该在线算法的次优解。数值结果表明,采用马尔可夫聚合可以显著缩短算法的运行时间,而不会造成不合理的性能下降。
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引用次数: 0
Quantifying the Quality Attenuation of WiFi 量化WiFi的质量衰减
Pub Date : 2022-09-26 DOI: 10.1109/LCN53696.2022.9843690
Bjørn Ivar Teigen, N. Davies, K. Ellefsen, T. Skeie, J. Tørresen
WiFi is one of the most widely deployed networking technologies, and understanding WiFi performance is therefore of great importance. The WiFi MAC layer sometimes introduces significant and variable delays. No existing models of the WiFi protocol describe WiFi performance in terms of complete latency distributions. In this work, we present a novel model of WiFi performance. We explicitly define our model in terms of the latency introduced at each step in the protocol state machine, and the model produces complete latency distributions. We validate the model by comparing its outputs to previous modeling work and real-world measurements. Finally, we use our results to quantify the latency distribution of WiFi as a function of the duration of transmit opportunities and the number of stations competing for the channel. Quantifying this relation represents a significant improvement in our understanding of WiFi performance that would not be possible with existing models.
WiFi是最广泛部署的网络技术之一,因此了解WiFi性能非常重要。WiFi MAC层有时会引入显著的可变延迟。现有的WiFi协议模型都没有从完全延迟分布的角度来描述WiFi性能。在这项工作中,我们提出了一个新的WiFi性能模型。我们根据协议状态机中每一步引入的延迟显式地定义了我们的模型,并且该模型产生了完整的延迟分布。我们通过将其输出与之前的建模工作和实际测量结果进行比较来验证模型。最后,我们使用我们的结果来量化WiFi的延迟分布,作为传输机会持续时间和竞争信道的电台数量的函数。量化这种关系代表了我们对WiFi性能的理解的重大改进,这在现有模型中是不可能的。
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引用次数: 1
Encrypted Traffic Detection: Beyond the Port Number Era 加密流量检测:超越端口号时代
Pub Date : 2022-09-26 DOI: 10.1109/LCN53696.2022.9843432
Hossein Doroud, Ahmad Alaswad, F. Dressler
Internet service providers (ISP) rely on network traffic classifiers to provide secure and reliable connectivity for their users. Encrypted traffic introduces a challenge as attacks are no longer viable using classic Deep Packet Inspection (DPI) techniques. Distinguishing encrypted from non-encrypted traffic is the first step in addressing this challenge. Several attempts have been conducted to identify encrypted traffic. In this work, we compare the detection performance of DPI, traffic pattern, and randomness tests to identify encrypted traffic in different levels of granularity. In an experimental study, we evaluate these candidates and show that a traffic pattern-based classifier outperforms others for encryption detection.
互联网服务提供商(ISP)依靠网络流量分类器为其用户提供安全可靠的连接。加密流量带来了挑战,因为使用经典的深度数据包检测(DPI)技术攻击不再可行。区分加密流量和非加密流量是解决这一挑战的第一步。已经进行了几次尝试来识别加密的流量。在这项工作中,我们比较了DPI、流量模式和随机性测试的检测性能,以识别不同粒度级别的加密流量。在一项实验研究中,我们评估了这些候选分类器,并表明基于流量模式的分类器在加密检测方面优于其他分类器。
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引用次数: 0
A Robust Monte-Carlo-Based Deep Learning Strategy for Virtual Network Embedding 一种鲁棒的蒙特卡罗深度学习虚拟网络嵌入策略
Pub Date : 2022-09-26 DOI: 10.1109/LCN53696.2022.9843683
G. Dandachi, Anouar Rkhami, Y. H. Aoul, A. Outtagarts
Network slicing is one of the building blocks in Zero Touch Networks. It mainly consists in a dynamic deployment of services in a substrate network. However, the Virtual Network Embedding (VNE) algorithms used generally follow a static mechanism, which results in sub-optimal embedding strategies and less robust decisions. Some reinforcement learning algorithms have been conceived for a dynamic decision, while being time-costly. In this paper, we propose a combination of deep Q-Network and a Monte Carlo (MC) approach. The idea is to learn, using DQN, a distribution of the placement solution, on which a MC-based search technique is applied. This improves the solution space exploration, and achieves a faster convergence of the placement decision, and thus a safer learning. The obtained results show that DQN with only 8 MC iterations achieves up to 44% improvement compared with a baseline First-Fit strategy, and up to 15% compared to a MC strategy.
网络切片是零接触网络的基石之一。它主要包括在底层网络中动态部署业务。然而,所使用的虚拟网络嵌入(VNE)算法通常遵循静态机制,导致嵌入策略次优且决策鲁棒性较差。一些强化学习算法已经被设想为一个动态决策,而时间昂贵。在本文中,我们提出了一种深度q网络和蒙特卡罗(MC)方法的结合。这个想法是学习,使用DQN,一个分布的安置解决方案,在此基础上,一个基于mc的搜索技术应用。这改进了解空间探索,实现了更快的布局决策收敛,从而实现了更安全的学习。获得的结果表明,与基线First-Fit策略相比,只有8个MC迭代的DQN实现了高达44%的改进,与MC策略相比,高达15%的改进。
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引用次数: 4
A Framework for Flexible ILDA Digital Network (IDN) Audio Streaming 一个灵活的ILDA数字网络(IDN)音频流的框架
Pub Date : 2022-09-26 DOI: 10.1109/LCN53696.2022.9843411
M. Frank
This demo paper presents an update on ILDA (International Laser Display Association) audio stream specification in the context of the ILDA Digital Network (IDN). A framework of software elements is introduced to interface with audio hardware on a computer and other software that is able to handle multi-channel audio data. The demo will showcase the new elements in action and also will point out the interoperability to existing IDN elements.
本演示论文介绍了在ILDA数字网络(IDN)背景下ILDA(国际激光显示协会)音频流规范的更新。介绍了一种软件元素框架,用于与计算机上的音频硬件和其他能够处理多通道音频数据的软件进行接口。该演示将展示正在运行的新元素,并指出与现有IDN元素的互操作性。
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引用次数: 0
Securing MPTCP Connections: A Solution for Distributed NIDS Environments 保护MPTCP连接:分布式NIDS环境的解决方案
Pub Date : 2022-09-26 DOI: 10.1109/LCN53696.2022.9843271
João Pedro Meira, Rui Pedro C. Monteiro, J. M. Silva
With continuous technological advancement, multihomed devices are becoming common. They can connect simultaneously to multiple networks through different interfaces. However, since TCP sessions are bound to one interface per device, it hampers applications from taking advantage of all the available connected networks. This has been solved by MPTCP, introduced as a seamless extension to TCP, allowing more reliable sessions and enhanced throughput. However, MPTCP comes with an inherent risk, as it becomes easier to fragment attacks towards evading NIDS. This paper presents a study of how MPTCP can be used to evade NIDS through simple cross-path attacks. It also introduces tools to facilitate assessing MPTCP-based services in diverse network topologies using an emulation environment. Finally, a new solution is proposed to prevent cross-path attacks through uncoordinated networks. This solution consists of a host-level plugin that allows MPTCP sessions only through trusted networks, even in the presence of a NAT.
随着技术的不断进步,多主设备变得越来越普遍。它们可以通过不同的接口同时连接到多个网络。然而,由于TCP会话绑定到每个设备的一个接口,它阻碍了应用程序利用所有可用的连接网络。MPTCP解决了这个问题,它作为TCP的无缝扩展引入,允许更可靠的会话和增强的吞吐量。然而,MPTCP带有固有的风险,因为它变得更容易将攻击碎片化以逃避NIDS。本文介绍了如何使用MPTCP通过简单的跨路径攻击来逃避NIDS的研究。本文还介绍了一些工具,以便使用仿真环境在不同的网络拓扑中评估基于mptcp的服务。最后,提出了一种防止非协调网络跨路径攻击的新方案。该解决方案由一个主机级插件组成,该插件只允许MPTCP会话通过可信网络,即使在存在NAT的情况下也是如此。
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引用次数: 0
A Novel Frame Forwarding Algorithm for Switched Networks 交换网络中一种新的帧转发算法
Pub Date : 2022-09-26 DOI: 10.1109/LCN53696.2022.9843759
P. Willis, N. Shenoy, Yin Pan, John F. Hamilton
Switched networks use meshed topologies for path redundancy; loop-free frame forwarding paths are established by protocols that use either the spanning or Dijkstra tree algorithms. When a network link or device fails, the tree must be repaired, leading to high convergence latencies impacting both broadcast and unicast traffic. Unicast frames are constrained to use the tree paths, which may not be the shortest path and links are not utilized uniformly. We propose a new meshed tree algorithm and meshed tree protocol (MTP) to provide non-looping paths (with backup) for broadcast frames. We also propose a new scheme for unicast frames to use shortest paths (provisioned with backup) between end devices. A novel virtual ID technique to construct the trees makes the protocol robust and provides fast failure recovery. In this article, we present implementation details of MTP on the GENI testbed and compare its performance with state-of-the-art loop-avoidance protocols.
交换网络使用网状拓扑实现路径冗余;无环帧转发路径由使用生成或Dijkstra树算法的协议建立。当网络链路或设备出现故障时,必须对树进行修复,导致高收敛延迟,影响广播和单播流量。单播帧被限制使用树路径,这可能不是最短路径,链路也没有统一使用。我们提出了一种新的网状树算法和网状树协议(MTP)来为广播帧提供非环路路径(带备份)。我们还提出了一种新的单播帧方案,在终端设备之间使用最短路径(配备备份)。一种新的虚拟ID技术构造树,使协议具有鲁棒性和快速的故障恢复能力。在本文中,我们介绍了MTP在GENI测试平台上的实现细节,并将其性能与最先进的环避免协议进行了比较。
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引用次数: 0
Reliable Water-Air Direct Wireless Communication: Kalman Filter-Assisted Deep Reinforcement Learning Approach 可靠的水气直接无线通信:卡尔曼滤波辅助深度强化学习方法
Pub Date : 2022-09-26 DOI: 10.1109/LCN53696.2022.9843503
Jinglong Wang, Hanjiang Luo, Rukhsana Ruby, Jiangang Liu, Kai Guo, Kaishun Wu
Optical wireless communication (OWC) is an emerging technology for direct communication through the water-air interface. However, due to the high directionality of optical beams and the harsh oceanic environment, it faces significant challenges to achieve the alignment and preserve the link availability, as the waves cause beam deflection and the mobility of the transceivers makes the link worse. To tackle these challenges and achieve reliable optical communication between autonomous underwater vehicles and unmanned aerial vehicles, we propose a deep reinforcement learning algorithm assisted by an extended Kalman filter to solve the alignment issue. To improve the reliability of communication, we present an algorithm to obtain the optimal beam divergence angle to maximize the link availability. The numerical simulations demonstrate that the proposed scheme achieves better performance in terms of energy consumption and alignment accuracy, and the link availability is increased by 25% compared to that without adjustment.
光无线通信(OWC)是一种通过水-空气接口直接通信的新兴技术。然而,由于光束的高方向性和恶劣的海洋环境,由于波浪引起光束偏转和收发器的移动性使链路恶化,因此实现对准和保持链路可用性面临着重大挑战。为了解决这些挑战并实现自主水下航行器和无人机之间可靠的光通信,我们提出了一种扩展卡尔曼滤波器辅助的深度强化学习算法来解决对准问题。为了提高通信的可靠性,提出了一种获取最佳波束发散角的算法,使链路可用性最大化。数值仿真结果表明,该方案在能量消耗和对准精度方面取得了更好的性能,链路可用性比未调整时提高了25%。
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引用次数: 2
期刊
2022 IEEE 47th Conference on Local Computer Networks (LCN)
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