协议数据单元

ATM适配层（AAL）在ATM网络上支持语音、视频、数据等通信业务，基本功能是高层协议数据单元和ATM信元的转换。

ATM adaptation layer supports communication services such as voice , video , data over ATM network , It 's function is conversion between higher protocol data unit and ATM cell .

设计了TEMP的协议数据单元，说明各类型报文的主要作用，并介绍了TEMP的工作流程。

Then , we design the protocol data unit of TEMP , explain the main function of various types of packets , and introduce the workflow of TEMP .

并讨论了协议数据单元PDU对网络带宽资源的开销分析方法，以便于系统组网设计。

We also discuss the analyzing method for the expense of network transmission bands , which is the basis for designing DIS network .

在典型的分布式交互环境中，环境信息动态更新是基于协议数据单元（PDU），它不提供数据可靠性传输保证。

In a typical distributed interaction environment , environment information dynamic update is based on Protocol Data Unit ( PDU ), which does not guarantee reliable message transfer .

在本文中，我们利用两个帧聚合技术，即A-MPDU（MAC协议数据单元聚集）和A-MSDU（MAC服务数据单元聚合），来探讨MAC协议的性能改进。

In this thesis , we investigate the performance improvement of the MAC protocol by using the two frame aggregation techniques , namely A-MPDU ( MAC Protocol Data Unit Aggregation ) and A-MSDU ( MAC Service Data Unit Aggregation ) .

从应用角度讨论了分布式交互仿真（DIS）的协议数据单元PDU的类型、结构和格式等方面；并论述了PDU的设计方法，及与基于DIS体系结构的商业平台VRLink通信的实现。

This paper describes the type , structure and format of PDU ( Protocol Data Unit ) in DIS ( Distributed Interactive Simulation ) and discusses the designing method of PDU which can communicate with VR - Link , a commercial platform of network interface based on DIS architecture .

1作为表述应用层协议数据单元的方法。

As the method for representing APDU .

桥接协议数据单元：网桥使用这种信息类型进行管理和控制信息交换。

Bridge Protocol Data Unit : A message type used by bridges to exchange management and control information .

通过单个子网络运输，协议数据单元可到达的相邻系统。

An adjacent system reachable by traversal of a single subnetwork by a Protocol Data Unit ( PDU ) .

并给出了该安全子层的协议处理功能和协议数据单元的格式，介绍了该子层传输和接收的过程。

The protocol process function and the format of protocol data unit are given , and the procedure of transmission and receiption are presented .

本文描述了MOTIS系统结构、功能模型和通信实体间的各种通信协议，以及在信息交换中使用的各种协议数据单元（PDU）的应用。

This paper describes the system structures , function models and communication protocols between the communication entities in MOTIS , introduces some protocol data units of different kinds used in information interchange and analyses the service elements and performance environment of MOTIS .

第二章首先介绍了SNMP协议体系的组成，主要介绍了管理信息库和协议数据单元的内容，然后分析了SNMP消息的工作机制和传输过程。

The second chapter firstly introduces the composing of SNMP protocol system , emphasizes the content of MIB and PDU , then analyses the work mechanism and transport course of SNMP messages .

本文主要讨论了当前发展中的3G高频自适应网络通信协议与技术，重点包括有3GALE概念与协议族、数据协议单元（PDU）、3G网络组成与技术性能等。

This paper describes the developing technology of 3G-ALE HF communications including the concept and protocol of 3G , protocol data unit as well as 3G network .

本文首先介绍了DICOM标准信息模型及其网络协议构架，并且深入浅出地介绍DICOM的服务和对象定义、消息数据编码、协议数据单元PDU（ProtocolDataUnite）的封装以及DICOM消息的交换机制等基本原理。

At first , this article introduces the DICOM information model and DICOM network protocol architecture ; specify the definition of DICOM Service and Object , message data coding , encapsulation of protocol data unite ( PDU ) and the mechanism of message exchange , etc.

随着愈来愈多的网络协议和业务协议的投入应用，作为表示信息的抽象句法ASN.1，在表达协议数据单元PDU字段之间的依赖关系面临着很大的困惑。

With the increasing application of network protocols and service protocols , ASN . 1 , as an abstract syntax notation for information expression , faces great confusion in expressing the dependence relations among fields of PDU .

首先，论文对SNMP网络管理的基础理论及协议规范做了必要的介绍，包括管理信息结构、管理信息库、协议操作过程和具体的协议数据单元的定义格式。

Firstly , some theories and protocols about SNMP network management are introduced in paper , include SMI ( Structure of Management Information ), MIB ( Management Information Base ), protocol operations and definition formats of PDU ( Protocol Data Unit ) .

当协议出现更新时，协议解析器仍然可以根据修改后的XML配置文件重新配置自身结构并正确解析新的协议数据单元。

When the EDCP is updated , Protocol parser can still reconfigure its structure according to the revised XML configuration file and parse the new PDU correctly .

本文从简单网络管理协议（SNMP）入手，着重对管理信息库（MIB）的结构、抽象句法表示法以及SNMP协议中的具体协议数据单元进行了分析。

This article analyzes the MIB ( Management Information Base ) structure , ASN . 1 ( Abstract Syntax Notation One ) and PDU ( Protocol Data Unit ) in SNMP .