工业物联网终端5G LAN组网方案研究

随着网络侧日趋成熟,5G LAN行业示范应用层出不穷,这对商业化工业物联网5G终端也提出新的需求。为了满足工业现场组网规范要求,首先分析行业应用对工业物联网终端5G LAN组网的具体要求,然后提出相应的组网解决方案,方案的核心在于设计了5G终端系统内L2/L3数据混合转发、转发优先级保障。方案已经在相关5G物联网终端产品中采用,该方案解决其生产区、运维混合组网问题。最后,展望了未来的研究方向。

基于5GLAN技术的配网智能分布式馈线自动化系统实用方案

为解决配电网智能分布式馈线自动化系统现有光纤通信方案存在建设成本高、运维困难及可拓展性差等难题,文章利用5G LAN全互联二层通信高可靠低时延网络技术,提出基于5G LAN技术的配电网智能分布式馈线自动化系统快速对等通信和组网实用化方案。文章围绕5G LAN适配应用、网络拓扑、业务通信指标等几个关键方面进行分析,开展实网试验验证,验证结果表明5G LAN通信技术满足智能分布式馈线自动化系统应用要求,可以快速、精确地切除故障,实现故障自愈,对提高配电自动化系统的智能化数字化运行水平和供电的可靠性有较高的实践应用价值。

“2024METAL THAILAND”(2024泰国展)通知

由中国铸造协会联合锻压、热处理、焊接等行业协会主办的“2024 METAL THAILAND”将于2024年9月18-20日在泰国曼谷国际贸易展览中心举办。

关于组织参加METAL THAILAND 2024考察团的通知

各会员及相关单位:由中国铸造协会联合锻压、热处理、焊接等行业协会主办的“METAL THAILAND 2024”,将于9月18-20日在泰国曼谷国际贸易展览中心举办。为助力产业链、供应链联动发展,推动企业全球化布局,我会将在展会后组织企业考察东南亚铸造市场,现将相关事宜通知如下:*为方便大家安排行程,本次团组均在曼谷集合。

“METAL THAILAND 2024”(2024泰国展)通知

由中国铸造协会联合锻压、热处理、焊接等行业协会主办的“2024 METAL THAILAND”将于2024年9月18-20日在泰国曼谷国际贸易展览中心举办。一、组织机构主办单位:中国铸造协会中国锻压协会中国热处理行业协会中国焊接协会承办单位:北京中铸世纪展览有限公司二、日程安排布展时间:2024年9月15-17日开展时间:2024年9月18-20日撤展时间:2024年9月21日三、同期活动第六届亚洲铸造论坛、先进铸造技术研讨会、中泰铸造企业交流对接会等。

基于LAN的分布式光伏发电通信组网

针对分布式光伏发电布局分散性及光伏场电磁干扰强,通信组网难度大等特点,提出光伏场组网以现场总线为主,光伏场各子单位工程组建独立LAN,若干子单位工程构筑环网形成虚WAN网与站控层组网。介绍分布式光伏系统的组成,并以“渔光互补”为例,对分布式光伏发电通信组网进行论述。随着当代工业文明的发展,能源问题越来越受到重视和关注,电力的需求量也随之增长,其中核电、水电和火电等占比大。

DS-CDMA system outer loop power control and improvement for multi-service

When a new user accesses the CDMA system, the load will change drastically, and therefore, the advanced outer loop power control （OLPC） technology has to be adopted to enrich the target signal interference ratio （Silt） and improve the system performance. The existing problems about DS-CDMA outer loop power control for multi-service are introduced and the power control theoretical model is analyzed. System simulation is adopted on how to obtain the theoretical performance and parameter optimization of the power control algorithm. The OLPC algorithm is improved and the performance comparisons between the old algorithm and the improved algorithm are given. The results show good performance of the improved OLPC algorithm and prove the validity of the improved method for multi-service.

面向5G 2B业务的5G LAN解决方案分析

与4G网络相比,5G网络在带宽、时延、安全性、可靠性等网络性能方面具有显著优势。随着5G行业应用的普及,5G网络能力增强对于网络服务能力拓展和业务差异化保障愈发重要,尤其是3GPP启动的5G LAN研究,助力推动了5G网络和行业应用的结合。深入分析了面向5G 2B业务的5G LAN技术解决方案,包括在5G 2B业务中的应用场景、关键技术和应用方案对比。最后,基于差异化的行业应用需求给出实施建议。

SERVICE-AWARE BASED FUZZY ADMISSION CONTROL SCHEME IN MULTI-SERVICE NETWORKS

Multi-service aggregated transmission is the direction of IP network. Providing different Quality of Service (QoS) assurance for different services has become a crucial problem in future network. Admission control is a vital function for multi-service IP network. This paper proposes a novel fuzzy admission control scheme based on coarse granularity service-aware technique. Different service has discriminative sensitivity to the same QoS characteristic parameter in general. The traffic class can be perceived by the service request parameter and the proposed QoS function. And requirements of dif- ferent applications can be met by maintaining the life parameter. From simulation results, the proposed scheme shows a better QoS provisioning than those traditional fuzzy logic based methods under the same admission probability.

5G LAN技术在智慧楼宇控制中的应用探索与实践

3GPP在R16版本定义了5G LAN技术,引入了网络原生支持层二通信、广播、组播、终端直连通信等新能力。创新的提出基于5G LAN技术的智能楼宇控制系统应用方案,并开展基于外场实际环境的改造实践,通过对终端、基站、核心网设备开展端到端5G LAN升级改造,以免布线方式高效便捷实现了楼宇原有各级、各类控制器与楼宇系统管理服务器的5G化全连接,使楼宇空调温度和新风系统的智能化自动控制,促进节能降耗,助力“双碳”目标。

Study on Task Assignment of Two-stage Multi-service Capability Port Logistics Service Providers

This paper mainly studies the problem of multi-task assignment of providers in port logistics service supply chain.As a core enterprise,port plays the role of logistics service integrator.With the continuous development of industrial integration,logistics service providers not only provide one kind of logistics service,but also develop into composite suppliers who capable of providing a variety of logistics services.This paper studies the task assignment problem of multi-service capability providers in the port logistics service supply chain.The two-stage logistics service provider task assignment model was built,which is based on the mixed evaluation method(including MOORA and FMEA)and the multi-objective planning method.Eventually,the effectiveness of the model method was verified by combining with an example.

面向行业专网的5G LAN技术应用研究

随着垂直行业专网的蓬勃发展,5GLAN功能逐渐成为5G网络在工业互联网应用中最重要的增强能力之一。文章深入分析了5G LAN的技术优势、关键技术及应用场景,对比说明了不同的流量转发方式,并提供了典型的行业应用方案以及5G LAN后续的研究方向,以期能够为5G LAN技术研究和应用提供参考。

COMBINED ADMISSION CONTROL AND SCHEDULING IN MULTI-SERVICE NETWORKS

Providing the required metrics for different service respectively is a basic characteristic in multi-service networks. The different service can be accessed and forwarded differently to provide the different transmission performance. The state information between admission control and scheduling can be exchanged each other by the defined correlation coefficient to adjust the flow distribution in progress. The priority queue length measured by scheduler implicitly can describe the priority flows load. And the fair rate can describe the non-priority flows load. Different admission decision will be made according to the state of scheduler to assure the time-delay upper threshold for the priority flows under heavy load and the fairness for elastic flows in light load, respectively. The stability condition was conduced and proved. Simulation results show the policy can ensure both the delay for the priority flows and the minimal throughput for non-priority flows.

THE STUDY OF SCP OVERLOAD CONTROL IN MULTI-SERVICE ENVIRONMENT

This paper first gives a SCP abstract model, then SCP’s overload detection and maximum processing capability are discussed quantitatively. Based upon dynamic adjustment, a new two-level SCP overload control algorithm is proposed. Theoretical analysis and simulation prove the algorithm’s effectiveness and fairness.

DESIGN OF MULTI-SERVICE SDH NETWORKS: FORMULATION AND HEURISTICS

Multi-service SDH networks support both packet- and circuit-switched traffic. Optimal design of such a network means to guarantee the circuit connections and configure a logical packet-switched topology with lowest congestion. This letter first formulates the problem as a mixed integer linear programming, which achieves optimal solution but has high computation. Then a heuristic algorithm is proposed to yield near-optimal solution efficiently. Performance of the algorithm is verified by an example.

STUDY ON THE ACCOUNT-SHARING STRATEGY FOR MULTI-SERVICES IN IMS ONLINE CHARGING MECHANISM

A prepaid subscriber is allowed to simultaneously implement multiple services in online charging mechanism of IP Multimedia Subsystem (IMS). It is a noteworthy discussion to effectively distribute the limited account resources among concurrent services. An account-sharing algorithm is proposed for multi-services,which introduces resource reclamation and redistribution processes based on the resource reservation of standard specifications and dynamically adjusts them according to the changes of Quality of Service (QoS). Three performance indexes are investigated in the simulation experiments, which are average number of accommodated sessions, average number of completed ses- sions, and average number of iterations per accommodated session. The results show that in the normal QoS level, the three indexes of the proposed algorithm averagely increase by 18.7%, 5.4%, and 3.1% compared with the Prepaid Credit Distribution (PCD) algorithm, and by 2.1%, 1.0%, and 1.8% compared with the Prepaid Credit Reclaim (PCR) algorithm. In the poor QoS level, the performance advantages are greater, which averagely increase by 29.1%, 7.1%, and 2.8% compared with PCD, and by 9.4%, 4.1%, and 3.6% compared with PCR.

基于VxLAN协议的新型SDN架构及应用

针对指挥信息系统云数据中心的传统网络架构存在的网络资源利用率不高、网络策略与业务无法自适应以及虚拟机迁移困难等问题,设计了一种基于虚拟扩展本地局域网(VxLAN)协议的新型软件定义网络(SDN)架构。分析了该架构的优势及信息处理流程,并以指挥信息系统双活云数据中心为例给出了该架构的应用效果。应用分析可见,该架构既可满足网络集中控制和网络服务质量适应差异化业务的需求,又可提升网络资源利用率、虚拟机跨域迁移能力以及指挥信息系统运行稳定性与可靠性。

基于5G LAN技术的自动化集装箱码头多场景集成应用系统

自动化集装箱码头主要装卸设备自动控制系统的稳定运行对通信传输的可靠性有严苛要求。设计了一种基于5G LAN技术的自动化集装箱码头集成应用系统。系统测试表明,该技术可提升系统运行稳定性及其运维效率,能够更经济、更灵活、更可靠地为自动化集装箱码头提供技术支持。

Echo-state-network classification based multi-services awareness in high-speed optical passive networks

With the challenge of great growing of services diversity,service-oriented supporting ability is required by current high-speed passive optical network( PON). Aimed at enhancing the quality of service( Qo S) brought by diversified-services,this study proposes an echo state network( ESN)based multi-service awareness mechanism in 10-Gigabite ethernet passive optical network( 10GEPON). In the proposed approach,distributed architecture is adopted to realize this ESN based multi-service awareness. According to the network architecture of 10G-EPON,where a main ESN is running in OLT and a number of ESN agents works in ONUs. The main-ESN plays the main function of service-awareness from the total view of various kinds of services in 10G-EPON system,by full ESN training. Then,the reservoir information of well-trained ESN in OLT will be broadcasted to all ONUs and those ESN agents working in ONUs are allowed to conduct independent service-awareness function. Thus,resources allocation and transport policy are both determined only in ONUs. Simulation results show that the proposed mechanism is able to better support the ability of multiple services.

5G LAN的应用需求与拓展研究

随着5G技术的快速发展,其在工业互联网、企业办公、家居环境等场景中的应用越来越广泛。然而,在这些场景中,传统的局域网技术往往难以满足高速、低时延和大规模连接的需求。因此,5G LAN作为一种新型的局域网技术应运而生,为多个细分市场提供与局域网和VPN(虚拟专网)相似的功能,且具备5G的大带宽、广域接入、移动性和高安全性的优势。