| 1. | The key techinics of switched ethernet control networks when used in industrial field include : 1 , making sure to be within real time
交换式以太控制网络应用于工业现场的关键技术如下： 1 、确保通信实时性。 |
| 2. | Abstract : in this paper the author points out the construction pattern , properties , characteristics and technological parametres of the fast switch ethernet
文摘:本文针对快速交换以太网的组成模式，性能特点以及相关的技术参数进行了论述。 |
| 3. | 10 / 100 mbps switching ethernet network has been taking the place of existing 10 mbps ethernet step by step and being the leading solution scheme of desktop - linking technology
10 100mbps交换式以太网逐步替代现存的10mbps以太网，并成为桌面连接技术的主流解决方案。 |
| 4. | Companies finding they have a media congestion problem with stations that do not need to run more quickly than 10m bit / sec are better off going with switched ethernet , analysts said
分析家们认为，那些遇到有媒介拥挤问题，且其工作站不需要快于10兆位/秒速度的公司最好用交换式以太网。 |
| 5. | This protocol can get topology recovery rapidly , reduce the forwarding delay , and improve the temporal capacity . then , this paper gives the application of qos in switched ethernet
怎样维护无环路的拓扑结构，为网络节点之间的通信提供快速、高效的路径，是交换机必须完成的重要功能。 |
| 6. | The approach combines hop - by - hop selective backpressure scheme with hol protection to eliminate congestion and improve performance of switched ethernet l2 domains instead of random early drop ( red ) scheme or its variants considering the characteristics of ethernet technique
基于ieee802 . 1p和802 . 1q的队列机制，采用逐跳选择式背压流控机制和头端阻塞保护机制消除拥塞，改善系统性能。 |
| 7. | The second chapter introduces the essence of the switched ethernet and the switch devices , import the definition of the smart switch , point out the position of our broadband access switch sw1000 in the whole system , and make the partition of the logic modules
第二章介绍交换式以太网和交换机的工作原理，引入智能交换机概念，介绍sw1000在整个系统中的地位，给出了逻辑功能模块的划分。 |
| 8. | 3 . to the non - deterministic of traditional ethernet , we studied the technologies such as full - duplex switched ethernet network , vlan , qos and ipv6 technology in detail , which are used to realize the ability of real - time of industrial ethernet
3 、针对传统以太网的不确定性，我们结合现有技术，研究了采用全双工交换式以太网、虚拟局域网、服务质量( qos ) 、 ipv6等技术提高工业以太网实时性的方法和途径。 |
| 9. | 5 . in the industrial control application , information transmitted on control layer network has become more and more complex , requiring that communication network should satisfy real tune request diversity of information . to satisfy this requirement , a mixed schedule algorithm on switch ethernet is put forward based on information classification . according to information types , the algorithm takes different schedule algorithm which include setting priority level , modified rm schedule algorithm on hard real time information , priority level upgrade schedule algorithm
针对这一问题，通过研究交换式以太网的实时调度问题和过程监控层信息的实时性要求，对信息进行了分类，提出了基于交换式以太网的混合调度算法，对不同类型的信息采取不同的调度算法，在优先级分配上，对各类信息设置不同的优先级;对硬实时信息，提出了改进的rm调度算法;对硬实时信息和软实时信息的协调，提出了优先级提升调度算法。 |
| 10. | This paper introduces the the development of the switched ethernet lan , analyses the function structure of the ethernet switch and points out the plotting of the software domain and hardware domain in ethernet switch . this paper puts forward the the architecture of the layer 2 ethernet switch versatile software platform . following of the idea of layering in the network stack and adopting modular design method in the design of the versatile software platform provides it with the characteristics of good porting , good scalability , and good cutting . and because the design of the layer 2 switched protocol comforms to the specificaion of ieee 802 . 1 completely , the platform has the characteristic of versatility in the field of ethernet switch . at last , we implement a layer 2 managed switch in a specific switch hardware
本文介绍了交换式以太网的发展过程，认真分析了以太网交换机的功能结构，明确了交换机硬件域与软件域划分，在此基础上提出了二层以太网交换机通用软件平台的体系结构，并对其中关键技术进行了深入剖析与设计。该通用软件平台的设计遵循了网络协议栈分层设计的思想，采用模块化设计方法，使其具有可移植、可扩展、可裁剪的特点。同时，所设计的二层交换协议完全遵循ieee802 . 1标准，在以太网交换机领域具有通用性。 |
