Event-Triggered Differentially Private Average Consensus for Multi-agent Network

This paper investigates the differentially private problem of the average consensus for a class of discrete-time multi-agent network systems(MANSs). Based on the MANSs,a new distributed differentially private consensus algorithm(DPCA) is developed. To avoid continuous communication between neighboring agents, a kind of intermittent communication strategy depending on an event-triggered function is established in our DPCA. Based on our algorithm, we carry out the detailed analysis including its convergence, its accuracy, its privacy and the trade-off between the accuracy and the privacy level, respectively. It is found that our algorithm preserves the privacy of initial states of all agents in the whole process of consensus computation. The trade-off motivates us to find the best achievable accuracy of our algorithm under the free parameters and the fixed privacy level. Finally, numerical experiment results testify the validity of our theoretical analysis.

Security Risk Prevention and Control Deployment for 5G Private Industrial Networks

In this paper,we investigate and analyze the network security risks faced by 5G private industrial networks.Based on current network security architecture and 3GPP requirements and considering the actual application of 5G private industrial networks,a comparative analysis is used to plan and design a private network security construction scheme.The network security construction model,network organization,and key processes of 5G private industrial networks at the current stage are investigated.In addition,the key direction for the next stage of construction is discussed.

Performance Evaluation of an Internet Protocol Security (IPSec) Based Multiprotocol Label Switching (MPLS) Virtual Private Network

This paper evaluates the performance of Internet Protocol Security (IPSec) based Multiprotocol Label Switching (MPLS) virtual private network (VPN) in a small to medium sized organization. The demand for security in data networks has been increasing owing to the high cyber attacks and potential risks associated with networks spread over distant geographical locations. The MPLS networks ride on the public network backbone that is porous and highly susceptible to attacks and so the need for reliable security mechanisms to be part of the deployment plan. The evaluation criteria concentrated on Voice over Internet Protocol (VoIP) and Video conferencing with keen interest in jitter, end to end delivery and general data flow. This study used both structured questionnaire and observation methods. The structured questionnaire was administered to a group of 70 VPN users in a company. This provided the study with precise responses. The observation method was used in data simulations using OPNET Version 14.5 Simulation software. The results show that the IPSec features increase the size of data packets by approximately 9.98% translating into approximately 90.02% effectiveness. The tests showed that the performance metrics are all well within the recommended standards. The IPSec Based MPLS Virtual private network is more stable and secure than one without IPSec.

Effective and Extensive Virtual Private Network

A Virtual Private Network (VPN) allows the provisioning of private network services for an organization over a public network such as the Internet. In other words a VPN can transform the characteristics of a public which may be non-secure network into those of a private secure network through using encrypted tunnels. This work customized a standard VPN to a newly one called EEVPN (Effective Extensive VPN). It transmits a small data size in through a web based system in a reasonable time without affecting the security level. The proposed EEVPN is more effective where it takes small data transmission time with achieving high level of security. Also, the proposed EEVPN is more extensive because it is not built for a specific environment.

Investigation and Analysis on the Status Quo of College Students’Network Entrepreneurship in Private University

This year,the number college graduates in China surpassed tens of millions for the first time.The employment rate of fresh graduates has been concerning.In view of this,network entrepreneurship has become an important channel and platform to solve the problem of college students’employment.The government,society and universities has been actively encouraging college students'network entrepreneurship as the value of college students'network entrepreneurship is significant.This paper analyzes the current situation of college students'network entrepreneurship and the problems faced through the survey data and thus suggests corresponding countermeasures.

PIR-based data integrity verification method in sensor network

Since a sensor node handles wireless communication in data transmission and reception and is installed in poor environment, it is easily exposed to certain attacks such as data transformation and sniffing. Therefore, it is necessary to verify data integrity to properly respond to an adversary's ill-intentioned data modification. In sensor network environment, the data integrity verification method verifies the final data only, requesting multiple communications. An energy-efficient private information retrieval(PIR)-based data integrity verification method is proposed. Because the proposed method verifies the integrity of data between parent and child nodes, it is more efficient than the existing method which verifies data integrity after receiving data from the entire network or in a cluster. Since the number of messages for verification is reduced, in addition, energy could be used more efficiently. Lastly, the excellence of the proposed method is verified through performance evaluation.

E2E KEEP: End to End Key Exchange and Encryption Protocol for Accelerated Satellite Networks

Accelerating methods are used to enhance TCP performance over satellite links by employing Performance Enhancement Proxies (PEPs). However, providing a secure connection through the PEPs seems to be impossible. In this paper an appropriate method is proposed in order to provide an accelerated secure E2E connection. We show an efficient secure three-party protocol, based on public key infrastructure (PKI), which provides security against spiteful adversaries. Our construction is based on applying asymmetric cryptography techniques to the original IKE protocol. Security protocols use cryptography to set up private communication channels on an insecure network. Many protocols contain flaws, and because security goals are seldom specified in detail, we cannot be certain what constitute a flaw. Proofing security properties is essential for the development of secure protocol. We give a logic analysis of the proposed protocol with the BAN-logic and discuss the security of the protocol. The result indicates that the protocol is correct and satisfies the security requirements of Internet key exchange. Based on the results of this preliminary analysis, we have implemented a prototype of our security protocol and evaluated its performance and checked safety properties of security protocol, and the results show that the protocol is robust and safe against major security threats.

STUDY ON NEIGHBORHOOD DISCOVERY PROTOCOL IN COMMUNICATION NETWORKSGRANULAR SLUDGE BY BATCH TESTS

One algorithm and one method for PNNI(Private Network to Network Interface) routing were presented. The algorithm is OIL (Older Is Leader) algorithms for Peer Group selection, and the method is the DOO (Distributed object-oriented) method for HDOS (Hierarchy Distributed-Object System), PNNI systems and IP(Internet Protocol) networks. Based on the specifications from ATM forum, and the creative ideas from Distributed System realization, this paper studies and analyzes the private ATM network environment. The OIL algorithm and the DOO method are both for PNNI routing protocol. Through the PNNI simulation, the availability and robustness are proved for the above two improvements.

STUDY ON NEIGHBORHOOD DISCOVERY PROTOCOL IN COMMUNICATION NETWORKS

A fuzzy requirement based strategy for QoS service in broadband networks was presented. With the analysis of QoS service in ATM networks and broadband IP networks, it gave a requirement based strategy for QoS service application with Fuzzy language evaluation principles. The requirement parameters are chosen according to the WANT/COST rule, and a fuzzy set is constructed to realize the fuzzy determinant. The simulation results show that it is useful to evaluate the QoS service in broadband networks, and to effectively simplify the access protocols and solve the billing issues in broadband networks.

5G高铁专网覆盖综合解决方案研究和应用

5G高铁覆盖面临着资源占时短、瞬时容量高、车体损耗大、移动速度快、基站交替快和远近兼顾难等多重挑战。本文针对5G高铁专网的覆盖方案、容量方案、公专网频率协同方案、主设备与天线选型方案、优化创新方案五大关键点开展了对比论证和深入研究,并应用于某高铁规划建设优化实践中,提升了高铁客户的感知,满足了“5G高铁上车”过渡期的高铁场景5G覆盖需求,为后续高铁覆盖项目的应用推广提供了重要的参考。

5G专网部署AI大模型能力的研究

为满足行业终端安全接入组织专网的移动性需求,能随时以自然语言交流方式实现行业应用与知识库的人机交互,文章对5G专网和交互式AI模型应用部署进行研究,阐述了在5G专网中部署行业AI大模型能力的解决方案,通过网络切片、安全策略和边缘云计算的部署方案解决网络安全和信息交互时延等问题,从而拓展5G专网在AI领域的应用场景,保障行业信息和敏感数据,提升工作效率。

从2B到4B——电信行业与垂直行业的供需协同倍增发展

为更好地发展下一代移动通信技术,加快5G/6G建设,需将发力点由“面向企业”的2B(To Business)向“为了企业”的4B(For Business)转变。从2B到4B,是从供给侧主导向需求侧主导的转变,是从“供给外生赋能”向“供需内生协同”本质的转变。发展5G/6G公专网,需要树立全生命周期的可持续发展理念,深度理解目标企业的核心诉求,充分发挥企业的主体作用。应由垂直行业主导公专网应用的标准制定与生态建设,设计可复制、可定义的商业模式,从顶层设计开始,将数字技术融入到垂直行业数字化转型之中,实现5G/6G公专网发展从2B到4B的转变,创造电信行业与垂直行业供需协同、价值倍增的可持续发展模式。

基于5G的专科联盟分级诊疗平台的构建与应用

目的:为了进一步推进医联体远程医疗协作业务向基层医疗卫生机构提供远程医疗相关服务,通过信息化手段促进资源的纵向流动,提高优质医疗资源的可及性以及医疗服务整体效率。方法:基于5G虚拟专网技术,在医联体内建立集远程会诊、远程示教、远程培训、数字资源共享等多种功能为一体的远程医疗协助服务平台。结果:在医联体内部,通过移动专网的使用,医护人员能够更加便捷、安全地进行远程会诊和教学工作。结论:充分利用虚拟专网优势,实现了通信主体间高速、高可靠、低时延以及安全的信息传输,保障了远程医疗协作业务应用场景的顺利开展。

基于RTD1296的私有存储设备的设计

为满足私有存储设备传输安全、传输数据高效、节省电能的需求,设计一种以RTD1296为控制核心的千兆私有存储设备。该设备搭载Ubuntu系统和SFTP服务器,确保数据传输安全;采用千兆以太网和千兆无线网卡无缝连接互联网,确保数据高效传输;使用ZeroTier异地组网技术实现内网穿透;使用MQTT技术实现设备远程开关机,达到节省电能和保护磁盘数据安全的效果;使用AIRKISS+ESPTOUCH技术实现智能手机配网;具有蓝牙连接一键唤醒设备,提醒用户备份,易用高效。实验结果表明,所设计的私有存储设备能够保证数据传输安全,相比于RTD1195存储设备,该设备的下载速度快3倍,上传速度快7倍,整机节能高达50%,可实现安全、高效、节能、易用的目标。

中国民营经济高质量发展空间关联网络结构特征及影响因素分析

了解民营经济高质量发展的空间关联网络结构状态及其影响因素,对促进民营经济实现高质量发展具有重要作用。以2014年至2021年我国31个省(自治区、直辖市)民营经济的省际面板数据为样本,基于修正后的引力模型测算民营经济高质量发展空间关联关系,在此基础上运用社会网络分析法(SNA)和二次指派程序(QAP)探究其空间关联网络结构整体、个体、块模特征及其影响因素。结果表明:我国民营经济高质量发展的空间关联网络结构特征相对稳定,并具有一定等级性;省际民营经济高质量发展的空间关联网络可以分为四个板块;城市距离对民营经济高质量发展的空间关联强度产生显著负向作用,科技投入水平差异、贸易经济水平差异和经济发展水平差异对其产生显著正向影响。研究结果可为推动民营经济高质量发展及引导省际民营经济形成高质量发展的关联网络结构提供参考。

基于5G行业虚拟专网的海量可调节用户侧资源互动方案

为满足新型电力系统建设的需要,应对电力行业用户侧资源的不断扩张和结构变化,需要用户侧资源在互动时具有广连接、低时延的特点。基于上述问题,对当前用户侧可调节资源的需求进行了分析,结合5G行业虚拟专网的优势,给出了5G行业虚拟专网应用于用户侧资源互动领域的可行性,提出了基于5G虚拟专网的资源互动方案,通过虚拟专网配合柔性网络切片技术,实现对海量可调节用户侧资源的分区管理,从而支撑低时延、高质量和高安全性的可调节用户侧资源互动。

面向集成的VPN解决方案

针对传统方式构建的VPN不支持承载多种数据类型、承载数据缺乏安全性、标签边缘设备负载过重等问题,提出了集成的VPN解决方案。该方案设计包含GRE VPN的建立、IPSEC VPN的建立、网络设备虚拟化、MPLS VPN的建立、私网数据的识别与隔离5个关键步骤,实现了各VPN技术数据的嵌套与各VPN技术的相互融合,融合后的VPN既支持承载多种数据类型,又支持数据交互的安全,且能实现私网数据访问控制与地址复用,还能实现数据的负载分担。为验证方案的可行性,对方案建立的隧道、网络资源池、标签转发路径等方面进行了测试与验证,达到了预期设定的目标。为凸显方案的优势,与传统方式在背板带宽、端口速率等方面进行了对比分析。分析结果表明,该方案的背板带宽与端口速率随着资源池中设备数的增加而增长,其数据传输能力相比传统方式成倍增长,且在数据的负载分担、数据安全、可管理性与可维护性等方面优于传统方案,为构建实用、可靠、安全的VPN提供了思路。

校企共建多网融合下的“5G+智慧校园”研究

以5G技术为信息化新基建载体,设计“5G+智慧校园”的实施框架。从运用5G技术全面赋能高校智慧校园实现共建、共融、共享为切入点,剖析智慧校园视域下5G智慧应用的现实需求,分析“5G+智慧应用”的作用与研究意义。结合某高校 “5G+智慧应用”多类应用场景实践,从部署模式、分流及认证、信息安全保障三个方面探究校园5G专网模式下基建新生态关键技术方案,为构筑泛在接入、多网融合、部署灵活、安全可控的5G创新应用提供支撑。

校园5G专网的设计与实现

目前校园网存在明确的地域边界,应用限制在校园网内部,外部用户需要通过各种VPN系统接入校园网,存在使用不便性能下降的问题;其次,校园内移动终端接入校园网需要大量WiFi设施,投资大效果一般。利用5G网络高速率、低时延和高并发的特点,使用UPF分流技术构建校园5G融合专网,将访问校园网的数据通过5G融合网关到达校园网,扩展校园网边界,二次鉴权系统保证校园网接入安全,实现了大规模移动终端和物联网设备接入校园网,具备投资少性能好的优势。测试表明校园5G专网用户与校内用户体验一致,使用方便且性能优良。

一种基于虚拟专用网的网络安全解决方法

随着信息社会化的到来,网络安全形势日益严峻。组织单位内的个人身份信息、生物识别信息、单位财务信息、商业机密等敏感信息一旦泄露,可能会导致组织单位遭受重大财产损失。本文提供一种组织内部敏感信息安全访问的解决方案,其思路是将网络划分成三个区域,将组织单位服务器及敏感信息置于授权的虚拟专用网络中,其他区域均应通过严格的身份认证和授权方可访问授权区域,同时通过高强度的加密技术和安全传输通道实现信息的安全传输。