通信网络中传送层技术教学案例设计  

Desigh of teaching case about transport layer technology in communication network

作　　者：陈美娟[1] 张颖[1] 刘旭[1] 朱晓荣[1] CHEN Meijuan;ZHANG Ying;LIU Xu;ZHU Xiaorong(School of Communications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《实验技术与管理》2024年第6期184-192,共9页Experimental Technology and Management

基　　金：国家自然科学基金项目(92367102);江苏省科技计划重点项目(BE2021013-2);南京邮电大学研究生教学改革项目(JGKT22_XYB12);南京邮电大学教学改革项目(JG00218JX75)。

摘　　要：针对通信网络中传送层技术教学中存在的理论容易理解但实践难以应用等问题,设计了多项传送层技术教学案例,实现了当前移动通信网络中端到端信息的传送。首先介绍了多种传送层关键技术的原理;然后介绍了当前移动通信网络的架构;最后在给出一种移动通信网络IP地址规划方案后,设计了多项理论与应用相结合的交换技术和路由技术教学案例,包括二层交换技术、三层交换技术、VLAN、路由和单臂路由技术。链路检测结果表明,所设计的教学案例实现了既定目标,是一种知行合一教学方法。[Objective]The communication network offers rich and diverse services to the public.To ensure the quality standards of these services,a variety of technologies are implemented in the transport layer of the communication network.To address the challenges associated with the theoretical comprehension and practical application of transport layer technology in teaching,multiple case-based teaching methods for transport layer technology have been designed and implemented.These methods enable end-to-end information transmission in current mobile communication networks.[Methods]First,this paper introduces the principles of various key technologies in the transport layer,encompassing switching technologies(such as layer two switching,VLAN,and layer three switching)and routing technologies(such as single-arm routing,static and dynamic routing).A layer two switch forwards packets based on MAC address tables.VLAN technology isolates broadcast domains within layer two switches and forwards packets based on MAC address tables and VLAN IDs.Layer three switches facilitate packet forwarding between different LANs or VLANs.Routers connect LANs to the public Internet by executing routing protocols,address translation,and other functions while providing security protection and other features for the LAN.Router interfaces achieve interoperability between previously isolated VLANs through the configuration of single-arm routing.Static routing requires manual configuration by administrators and suits small networks with stable network topologies.Dynamic routing is a routing protocol that autonomously learns routes and is appropriate for larger networks.Second,this article introduces the architecture of the 5G mobile communication network,covering Option 3x for non-standalone(NSA)and Option 2 for standalone(SA).In Option 3x,the core network comprises the 4G evolved packet core(EPC),while the wireless network incorporates both 4G and 5G base stations.In Option 2 architecture,the core network employs network function virtualization techn

关 键 词：移动通信网络 交换 路由 教学 案例 

分 类 号：TN915[电子电信—通信与信息系统]