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2022 IEEE 22nd International Conference on Communication Technology (ICCT)最新文献

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Research on IMS Packet Service Triggering Algorithm Based on Double Filtering Criterion 基于双过滤准则的IMS分组业务触发算法研究
Pub Date : 2022-11-11 DOI: 10.1109/ICCT56141.2022.10072892
Ning Ma, Qing Miao, Yu Qin, JinJin Li, TangJie Yuan
The Service trigger algorithm is the core of the entire IMS system platform, which can affect the work efficiency and service quality of the entire system. In the early days, the service trigger algorithm officially defined by 3GPP can no longer meet the overall requirements of current big data and big user information services. In order to meet the Service needs of the multimedia network platform and the huge user group in the future, this paper conducts an in-depth study on the official Service trigger algorithm, and proposes an IMS packet Service trigger algorithm based on the double filter criteria. This algorithm achieves the goal of quickly processing multiple services by combining the packet Service trigger mechanism with the iFC+sFC dual service filter criteria. The simulation results show that the new service triggering algorithm can effectively reduce the overall session setup delay, improve the system throughput, and greatly improve the IMS system service triggering efficiency.
业务触发算法是整个IMS系统平台的核心,它直接影响到整个系统的工作效率和服务质量。早期,3GPP官方定义的业务触发算法已经不能满足当前大数据、大用户信息业务的整体需求。为了满足未来多媒体网络平台和庞大用户群的业务需求,本文对官方业务触发算法进行了深入研究,提出了一种基于双过滤标准的IMS分组业务触发算法。该算法将分组业务触发机制与iFC+sFC双业务过滤标准相结合,实现了快速处理多个业务的目的。仿真结果表明,新的业务触发算法可以有效地降低会话建立的总体延迟,提高系统吞吐量,大大提高IMS系统的业务触发效率。
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引用次数: 0
Performance Analysis and Optimization for RIS-Aided Communication Systems ris辅助通信系统的性能分析与优化
Pub Date : 2022-11-11 DOI: 10.1109/ICCT56141.2022.10072573
Hao Liu, Yaxuan Liu, Wei Xun, Zhuoran Xu
Reconfigurable Intelligent Surface (RIS) stands out for its unique low-cost and low-energy characteristics, which is expected to break through the uncontrollability of wireless channels and build an intelligent programmable wireless environment. In this paper, we consider a RIS-aided downlink communication system including one access point serving a user terminal and derive closed-form expressions of ergodic achievable rate and outage probability. Then, we analyze the ergodic achievable rate in terms of high signal-to-noise ratio slope and power offset. A phase shift optimization scheme is also proposed to improve the ergodic achievable rate. Finally, simulation results are conducted to validate the accuracy of the analytical results. According to the simulation results, the proposed phase shift optimization scheme can improve the system performance, compared to the random phase shift scheme.
可重构智能表面(Reconfigurable Intelligent Surface, RIS)以其独特的低成本、低能耗特点脱颖而出,有望突破无线信道的不可控性,构建智能可编程无线环境。本文考虑一个包含一个接入点的ris辅助下行通信系统,并推导出遍历可达率和中断概率的封闭表达式。然后,我们从高信噪比斜率和功率偏置的角度分析遍历可达率。为了提高遍历可达率,提出了一种相移优化方案。最后通过仿真结果验证了分析结果的准确性。仿真结果表明,与随机相移方案相比,所提出的相移优化方案能够提高系统性能。
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引用次数: 0
DACS: A Double-layer Application Classification Scheme for Hybrid Zero-day Traffic DACS:混合零日流量的双层应用分类方案
Pub Date : 2022-11-11 DOI: 10.1109/ICCT56141.2022.10073219
Yulong Liang, Fei Wang, Shuhui Chen
As a fundamental countermeasure for network management and security, traffic classification has attracted public attention for a long time. All the time, the presence of zero-day traffic, network traffic of unknown applications in a classification system, leads to a significant reduction in the practicability and effectiveness of conventional traffic classification methods. This paper innovatively proposes a traffic classification scheme named DACS, which achieves accurate zero-day traffic detection, application traffic classification and high-performance incremental model updating, fitting for open-world and online traffic classification with plenty of zero-day traffic. DACS uses training samples to cross-simulate zero-day flows and combines the idea of distributed training. With a two-layer structure and a special voting mechanism, DACS is able to perform comprehensive traffic classification tasks in hybrid unknown traffic. In addition, DACS provides great convenience for updating the system knowledge and supports efficient incremental updates. The evaluations with real-world traffic verify the core advantages of the proposed scheme. DACS maintains over 95% classification accuracy on a public dataset (NUDT_MobileTraffic), which is better than the compared methods, and it only needs 1/K retraining computational cost to achieve model updates for new applications, where K is the number of sub-classifiers.
流分类作为网络管理和安全的根本对策,一直受到人们的关注。一直以来,零日流量,即未知应用的网络流量在分类系统中的存在,导致常规流量分类方法的实用性和有效性显著降低。本文创新性地提出了一种名为DACS的流量分类方案,该方案实现了精确的零日流量检测、应用流量分类和高性能的增量模型更新,适合开放世界和大量零日流量的在线流量分类。DACS使用训练样本交叉模拟零日流,并结合了分布式训练的思想。DACS采用两层结构和一种特殊的投票机制,能够在混合未知流量中执行全面的流量分类任务。此外,DACS为系统知识的更新提供了极大的便利,并支持高效的增量更新。实际流量的评估验证了该方案的核心优势。DACS在公共数据集(NUDT_MobileTraffic)上保持95%以上的分类准确率,优于比较的方法,并且只需要1/K的再训练计算成本就可以实现新应用的模型更新,其中K为子分类器的数量。
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引用次数: 0
Characterizations on Non-stationary Channel Statistics for High-Speed Train Communications in Viaduct Scenario 高架桥场景下高速列车通信非平稳信道统计特性研究
Pub Date : 2022-11-11 DOI: 10.1109/ICCT56141.2022.10073258
Kaien Zhang, Yan Zhang
In this paper, results for non-stationary channel statistics based on the wideband high-speed train (HST) channel measurement in the rich-scattering viaduct scenario are presented. Due to the fast movement of the train, both the fading characteristics and the Doppler-delay statistics change rapidly with time. The measurement campaign is implemented on the Guangzhou-Shenzhen passenger-dedicated railway at a central frequency of 2.4 GHz. The parameters of multi-path components (MPCs) are estimated by the Subspace-Alternating Generalized Expectation-maximization (SAGE) algorithm. The large-scale fading properties and the small-scale Doppler-delay statistics, including path loss, shadow fading, Rician K factor, number of MPCs, root-mean-square (RMS) delay spread, RMS angular spread, power-delay profile (PDP), and Doppler-power spectrum are analyzed. The non-stationary statistical models of the above parameters are given based on the measured results. The correlation property is characterized by the correlation matrix distance (CMD). It is shown that the HST channel in the rich-scattering viaduct scenario has strong non-stationarity characteristics. This work provides references for the design of HST communication systems and promotes technical developments.
本文给出了基于高架桥场景中宽带高速列车(HST)信道测量的非平稳信道统计结果。由于列车的快速运动,列车的衰落特性和多普勒延迟统计量都随时间快速变化。该测量活动在广深客运专线上实施,中心频率为2.4 GHz。采用子空间交替广义期望最大化(SAGE)算法对多路径分量(MPCs)参数进行估计。大规模的衰落特性和小规模Doppler-delay统计数据,包括路径损耗、阴影衰落,Rician K因子,mpc,均方根(RMS)延迟传播,RMS角蔓延,power-delay概要(PDP), Doppler-power频谱进行了分析。根据实测结果,给出了上述参数的非平稳统计模型。相关性用相关矩阵距离(CMD)来表征。结果表明,高架桥场景下的高通量通道具有较强的非平稳性。这个工作为HST通信系统的设计提供参考,促进技术的发展。
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引用次数: 0
How to Deploy RIS to Minimize Delay Spread in HST Communications: Railroad Side, or Train Side? 如何部署RIS以最小化HST通信中的延迟传播:铁路侧,还是列车侧?
Pub Date : 2022-11-11 DOI: 10.1109/ICCT56141.2022.10073344
Ke Wang, C. Lam, B. Ng
High-speed train (HST) communications are challenging due to fast time-varying channels and Doppler effects. Recently, reconfigurable intelligent surface (RIS) has been envisioned to be one of the most promising technologies for tackling the difficult problems of HST communications. In this paper, we first propose a transmission model of the HST communication system using RIS on the train side. Then, different strategies for mitigating delay spread (DS) are compared from the perspectives of the phase shift set design and deployment of the RIS. In addition, we derive the spectral efficiency (SE) expression of the proposed system. Numerical evaluations validate the analytical results and reveal that the RIS on the train side not only increases SE but also reduces DS.
高速列车(HST)通信具有快速时变信道和多普勒效应。近年来,可重构智能表面(RIS)被认为是解决HST通信难题的最有前途的技术之一。本文首先提出了一种基于列车侧RIS的HST通信系统的传输模型。然后,从相移集设计和RIS部署的角度比较了不同的延迟扩散缓解策略。此外,我们还推导了该系统的谱效率表达式。数值计算验证了分析结果,表明列车侧的RIS不仅提高了SE,而且降低了DS。
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引用次数: 2
Quantum Cryptography Technology and Application in Smart Grid 量子密码技术及其在智能电网中的应用
Pub Date : 2022-11-11 DOI: 10.1109/ICCT56141.2022.10072299
Julaiti Abulizi, Hu Qingsheng, Wen Wang
Recently, more and more governments and institutions are paying attention to quantum security communication because of its strict security. In China, some significant progresses have been made in practice when the research goes deeper. This paper investigates some key technologies of quantum cryptography in smart grid of China. First, the applications and challenges of quantum communication in smart grid are depicted, then the key technologies utilized in smart grid based on quantum key distribution (QKD) are explored in tail. At last quantum secure communication, including fault locating, long distance transmission and WDM technology are discussed. Our researches on the application of quantum cryptography in smart grid are very effective and hopeful to be extended to more application fields.
近年来,量子安全通信因其严格的安全性受到越来越多政府和机构的重视。在中国,随着研究的深入,在实践中取得了一些显著的进展。本文研究了中国智能电网中量子密码的一些关键技术。本文首先介绍了量子通信在智能电网中的应用和面临的挑战,然后探讨了基于量子密钥分发(QKD)的智能电网关键技术。最后讨论了量子保密通信的故障定位、远程传输和波分复用技术。我们对量子密码学在智能电网中的应用的研究是非常有效的,并且有望扩展到更多的应用领域。
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引用次数: 0
Integrated Sensing and Communication for Ambient Backscatter Communication Systems 环境后向散射通信系统的集成传感与通信
Pub Date : 2022-11-11 DOI: 10.1109/ICCT56141.2022.10072764
Tao Huang, Xinyue Xu, Xiaoyan Kuai, Ying-Chang Liang, Xu Zhao
This paper investigates integrated sensing and communication for an ambient backscatter communication (AmBC) system. The backscatter devices (BDs) modulate information over ambient orthogonal frequency division multiplexing (OFDM) signals, and the receiver (RX) realizes joint localization and information detection of the BDs. The system model is first established and the link-layer protocol is designed. Then the discrete Fourier transform (DFT) based and compressed sensing (CS) based methods are proposed to estimate the locations of BDs. The attenuation coefficients of the paths backscattered by BDs are estimated through least square (LS) method, and finally the information transmitted by the BDs is decoded. Simulation results have verified the performance of the algorithms, and it is shown that the larger bandwidth and antenna aperture are beneficial to improving the localization accuracy.
本文研究了环境后向散射通信(AmBC)系统的传感与通信集成。后向散射器件通过环境正交频分复用(OFDM)信号调制信息,接收机(RX)实现对后向散射器件的联合定位和信息检测。首先建立了系统模型,设计了链路层协议。然后提出了基于离散傅里叶变换(DFT)和基于压缩感知(CS)的bd位置估计方法。利用最小二乘法估计北斗系统后向散射路径的衰减系数,最后对北斗系统传输的信息进行解码。仿真结果验证了算法的性能,表明较大的带宽和天线孔径有利于提高定位精度。
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引用次数: 0
WindArms: More Efficient DGF Coverage-Guided Tracing WindArms:更有效的DGF覆盖引导跟踪
Pub Date : 2022-11-11 DOI: 10.1109/ICCT56141.2022.10073335
Yunheng Luo, Jianshan Peng, Jiahan Lin
Directed Graybox Fuzzing is an enhanced fuzzing technique that is widely used in security testing of network communication protocols, desktop software, file systems, etc. It guides the execution flow of the program to the code area of the target site by constructing specific input data, and realizes the test of the specific code area. It is usually used in scenarios such as patch testing, crash reproduction, and static analysis report verification. However, we found that coverage-guided tracing used by the existing Directed Graybox Fuzzing not only has high performance overhead but also has little value, because most test cases cannot discover new execution paths, and are even less likely to reach the target area. It doesn't make much sense to trace the coverage of these test cases. To address this challenge, we propose a new coverage-guided tracing mechanism and implement it prototype, WindArms. It will only trace the coverage of those which can discover new execution paths or reach the target area to reduce the performance overhead of those meaningless coverage-guided tracing. Our evaluation show WindArms not only significantly improves the performance of Directed Graybox Fuzzing, but also can discover security vulnerabilities in real-world software.
定向灰盒模糊测试是一种增强的模糊测试技术,广泛应用于网络通信协议、桌面软件、文件系统等的安全测试。通过构造特定的输入数据,将程序的执行流程引导到目标站点的代码区,并实现对特定代码区的测试。它通常用于补丁测试、崩溃再现和静态分析报告验证等场景。然而,我们发现现有的Directed Graybox Fuzzing所使用的覆盖引导跟踪不仅有很高的性能开销,而且没有什么价值,因为大多数测试用例不能发现新的执行路径,甚至不太可能到达目标区域。跟踪这些测试用例的覆盖率没有多大意义。为了解决这一挑战,我们提出了一种新的覆盖引导跟踪机制,并实现了它的原型——WindArms。它将只跟踪那些能够发现新的执行路径或到达目标区域的覆盖,以减少那些无意义的覆盖引导跟踪的性能开销。我们的评估表明,WindArms不仅显著提高了定向灰盒模糊测试的性能,而且可以发现现实软件中的安全漏洞。
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引用次数: 0
The Smart SD-WAN Architecture 智能SD-WAN架构
Pub Date : 2022-11-11 DOI: 10.1109/ICCT56141.2022.10072627
Weiqiang Cheng, Feng Yang, Tingting Han, Ruibo Han, Wenying Jiang, Geng Zhang, Jin Yang, Xiaoqiu Zhang
In this paper, we propose the Smart Software-Defined Wide Area Network (SD-WAN) Architecture, which combined the traditional SD-WAN and Segment Routing over IPv6 (SRv6) to realize an end-to-end SRv6 tunnel connection. Compared to traditional SD-WAN, the Smart SD-WAN can integrate with the underlay network to realize the collaboration of underlay and overlay. In this way, many services such as the ability of underlay network slicing when subscribers have bought the underlay network slicing service can be used. Furthermore, the Smart SD-WAN can provide differentiated, guaranteed Service Level Agreement (SLA) service and integrate virtual network elements in the cloud to provide service function chain (SFC).
本文提出了智能软件定义广域网(SD-WAN)架构,该架构将传统的SD-WAN与IPv6段路由(SRv6)相结合,实现端到端的SRv6隧道连接。与传统的SD-WAN相比,智能SD-WAN可以与底层网络集成,实现底层与叠加的协同。这样,用户购买了底层网络切片服务后,就可以使用底层网络切片等许多服务。此外,智能SD-WAN还可以提供差异化、有保障的SLA (Service Level Agreement)服务,并在云端集成虚拟网元,提供SFC (Service function chain)服务。
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引用次数: 0
Simulation Evaluation of Delay Tolerance Network Performance in Air-Ground Cooperative Scenarios 空地协同场景下时延容忍网络性能仿真评估
Pub Date : 2022-11-11 DOI: 10.1109/ICCT56141.2022.10073173
Qihang Chen, Chunyuan Tian, Dawei Ma, Shuangze Yang
With the development of unmanned aerial vehicle (UAV), the air-ground collaborative communication network which composed of UAV and ground base stations has also been developed and innovated. It can improve the performance of a delay tolerant network (DTN) consisted by a single network node. In this paper, we conduct a comprehensive evaluation and analysis of the performance of DTN air-ground cooperative networking through various features, such as UAV's the movement mode, movement speed, node cache, message survival time, network node density, routing protocol and others. The results show that the addition of UAV relay nodes can effectively improve the information transmission efficiency of DTN. In the scenario of large-scale node air-ground cooperative networking, air-ground cooperative networking is suitable for time-sensitive services and can improve the message delivery rate by 75% in a low message survival time.
随着无人机的发展,由无人机和地面基站组成的空地协同通信网络也得到了发展和创新。它可以提高单节点容错网络(DTN)的性能。本文从无人机的移动方式、移动速度、节点缓存、消息存活时间、网络节点密度、路由协议等多个方面对DTN地空协同组网的性能进行了综合评价和分析。结果表明,无人机中继节点的增加可以有效提高DTN的信息传输效率。在大规模节点地空协同组网场景下,地空协同组网适用于时间敏感型业务,在较低的消息生存时间下,可将消息投递率提高75%。
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引用次数: 0
期刊
2022 IEEE 22nd International Conference on Communication Technology (ICCT)
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