In this chapter we will study the design principles for layer 2, the data link layer.
在这一章中，我们将研究网络第二层——数据链路层的设计原则。
Then the data link layer and network layer design schemes of several typical systems are described in detail.
分类阐述了几种典型的数据链路层和网络层的设计方案和设计思想。
Secondly two layers are described in the thesis: the data link layer(DLL) and the fieldbus access sublayer(FAS).
分析了两个目标层：数据链路层和现场总线访问子层。
On the other hand, it adopts ARQ and RRM in the data link layer to control the time delay and jitter of voice services.
另一方面，通过链路层的ARQ技术和无线资源管理策略来控制语音业务的时延及时延抖动。
This study deals with the algorithms for achieving reliable, efficient communication between two adjacent machines at the data link layer.
我们将主要研究的是在数据链路层上，两台相连的机器之间进行可靠、有效通信而涉及到的一些算法。
The conversion was finished on the physical layer and the data link layer, and the problem of direct communications between fieldbus and Ethernet was solved.
该网关在网络的物理层和数据链路层完成协议转换，解决了现场总线和以太网无法实现直接通信的问题。
The difference of topology discovery between the network layer and the data link layer is described and the development and defect of the data link layer are analyzed.
阐述了网络层拓扑发现与数据链路层拓扑发现之间的区别，分析了数据链路层拓扑发现的研究现状和存在的不足。
This algorithm combined sub-carrier allocation in the physical(PHY) layer with traffic scheduling at the data link layer (DLL) by employing the channel state information.
利用物理层的信道状态信息，该算法将物理层（PHY）的子载波分配同数据链路层（DLL）的数据包业务调度结合起来。
But the intrinsic error exists in PP model for the effect of the data link layer and physical layer, and the incorrect result is obtained by filter algorithm when the network load is heavy.
由于受数据链路层和物理层的影响，PP测量模型本身存在着固有的测量误差；当网络负载较重时，PP测量模型就不能够通过过滤算法得出正确的测量结果。
PPP is the basic protocol of the Data Link Layer in this solution.
这种模式下使用的数据链路层协议主要是PPP。
We add the function of the per interface label space based on the source code, which enables to extend the LDP implementation to systems in which the data-link layer is ATM or FR.
我们在原实现基础上添加了每端口标记空间功能，使LDP实现可以向数据链路层为ATM或者帧中继的系统扩展。
We add the function of the per interface label space based on the source code, which enables to extend the LDP implementation to systems in which the data-link layer is ATM or FR.
我们在原实现基础上添加了每端口标记空间功能，使LDP实现可以向数据链路层为ATM或者帧中继的系统扩展。
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