通信工程专业英语课文翻译Word格式文档下载.docx

1、蓝牙规范定义了一个统一的结构，适用范围广的设备连接并相互沟通。Bluetooth technology has achieved global acceptance such that any Bluetooth enable device, almost everywhere in the world, can connect to other Bluetooth enabled devices in proximity. Bluetooth enabled electronic devices connect and communicate wirelessly through short

2、-range, ad hoc（特别） networks known as piconets Each device can simultaneously communicate with up to seven other devices within a single piconet. Each device can also belong to several piconets simultaneously. Piconets are established dynamically and automatically as Bluetooth enabled devices enter a

3、nd leave radio proximity.蓝牙技术已取得全球认可，使得任何支持蓝牙的设备，几乎在世界各地，可以连接到其他支持蓝牙的邻近装置。蓝牙功能的电子设备连接并通过短距离无线通信，特别网络，被称为微微网。每个设备可以同时在一个单一的微微网最多七个其他设备进行通信。每个设备也可以同时属于几个微微网。微网是动态和自动建立蓝牙功能的设备进入和离开无线电近炸。A fundamental Bluetooth wireless technology strength is the ability to simultaneously handle both data and voice tran

4、smissions .This enables users to enjoy variety of innovative solutions such as a hands-free headset （耳机）for voice calls, printing and fax capabilities, and synchronizing PDA , laptop, and mobile phone applications to name a few.一个基本的蓝牙无线技术的力量是同时处理数据和语音传输的能力，这使得用户可以享受各种创新的解决方案，如免提耳机进行语音通话，打印和传真功能，并同步

5、PDA，笔记本电脑，以及手机应用仅举几例。Core systemThe Bluetooth core system, defined by Bluetooth specification, is a common service layer protocol which covers four lower layers in seven layer protocol. Service Discovery Protocol （SDP） and the overall profile requirements are defined by Generic Access Profile （GAP）

6、A complete Bluetooth application requires a number of additional services and higher layer protocols that are defined in the Bluetooth specification核心系统 蓝牙核心系统，通过蓝牙规范中定义的，是一种常见的服务层协议，它包括在7层协议四个较低层。服务发现协议（SDP）和整体轮廓的要求是由通用访问模式（GAP）定义一个完整的蓝牙应用程序需要的一定数量的在蓝牙规范中定义额外的服务和更高层协议。The lowest three layers are so

7、metimes grouped into a subsystem known as the Bluetooth controller（蓝牙控制器）. This is a common implementation involving a standard physical communications interface（通信接口） between the Bluetooth controller and remainder of the Bluetooth system including thdeL2CAP,service layers and higher layers （known a

8、s the Bluetooth host）. Although this interface is optional ,the architecture is designed to allow for its existence and characteristics .The Bluetooth specification enable interoperability between independent Bluetooth enabled systems by defining the protocol messages exchanged between equivalent la

9、yers ,and also interoperability between independent Bluetooth sub-systems by defining a common interface between Bluetooth controllers and Bluetooth hosts.最低的3层有时被分为称为蓝牙控制器的子系统。这是一个常见的实现涉及到蓝牙控制器和蓝牙系统，包括thdeL2CAP ，服务层和更高的层（被称为蓝牙主机）的其余部分之间的物理标准通信接口。虽然这个接口是可选的，该架构的设计允许它的存在和特性。蓝牙规范定义的协议报文交换的对等层之间实现互操作性（

10、互用性，协同工作的能力）的独立蓝牙系统之间，也通过定义蓝牙控制器和蓝牙主机之间的通用接口独立的蓝牙子系统之间的互操作性。A number of functional blocks are shown and the path of services and data between these. The functional blocks shown in the diagram are informative; in general the Bluetooth specification does not define the details of implementation except

11、 where this is required for interoperability.若干功能模块被示出并在它们之间的服务和数据的路径。在图中所示的功能块是信息;在一般的蓝牙规范没有定义实现的细节除非这是必需的互操作性。Standard interactions are defined for all inter-device operation, where Bluetooth devices exchange protocol signaling according to the Bluetooth specification. The Bluetooth core system pr

12、otocols are the radio （RF（射频） protocol , link control （LC） protocol, link manager （LM） protocol and logical link control and adaptation protocol （L2CAP）, all of which are fully defined in subsequent parts of the Bluetooth specification. In addition, the service discovery protocol （SDP） is a service

13、layer protocol required by all Bluetooth applications.标准的交互定义的所有设备间的操作，根据蓝牙规范，其中的蓝牙设备交换协议信令。蓝牙核心系统协议是无线电（RF（射频）协议，链路控制（LC）协议，链路管理器（LM）协议和逻辑链路控制和适配协议（L2CAP） ，所有这些在以后的部分被完全定义蓝牙规范。此外，该服务发现协议（SDP）是由所有的蓝牙应用所需的服务层协议。The Bluetooth core system offers services through a number of service access points that a

14、re shown in the diagram as ellipses（椭圆）. These services consist of the basic primitives that control the Bluetooth core system. The services can be split into three types. There are device control services that modify the behavior and modes of a Bluetooth device, transport control services that crea

15、te, modify and release traffic bears（搬运者，载体） （channels and links）, and data services that are used to submit data for transmission over traffic bearers.It is common to consider the first two as belong to the C-plane and the last as belong to the U-plane.蓝牙核心系统提供服务通过一些被图中所示为椭圆形服务访问点。这些服务包括用于控制蓝牙核心系统的

16、基本原语。该服务可以分为三种类型：修改蓝牙设备的行为和模式，设备控制服务，创造交通管制服务，修改和释放的搬运者（信道和链路），数据服务通过交通搬运者用于提交数据传输的.它是常见的首先要考虑的两成属于C面，最后为属于U平面。A service interface to the Bluetooth controller sub-system is defined such that the Bluetooth controller may be considered a standard part. In this configuration the Bluetooth controller op

17、erates the lowest three layers and the L2CAP layer is contained with the rest of the Bluetooth application in a host system. The standard interface is called the host to controller interface （HCI）. Implication of this standard service interface is optional.服务接口到蓝牙控制器子系统被定义，使得所述蓝牙控制器可以被认为是标准的一部分。在此配置

18、蓝牙控制器运行的最低三层和L2CAP层包含与蓝牙应用程序的其余部分在一个主机系统。标准的接口称为主机控制器接口（HCI）（主机控制接口）。言下之意这个标准的服务接口是可选的。As the Bluetooth architecture is defined with the possibility of a separate host and controller communicating through an HCI, a number of general assumptions are made. The Bluetooth controller is assumed to have l

19、imited data buffering capabilities in comparison with the host. Therefore the L2CAP layer is expected to carry out some simple resource management when submitting L2CAP PDUs（Protocol Data Unit to the controller for transport to a peer device. This includes segmentation of L2CAP SDUs into more manage

20、able PDUs and then the fragmentation of PDUs into start and continuation packets of a size suitable for the controller buffers, and management of the use of controller buffers to ensure availability for channels with quality of service （QoS） commitments.作为蓝牙架构中定义了一个单独的主机和控制器通过HCI通信的可能性，一些一般假定。假定蓝牙控制

21、器具有有限的数据缓冲能力与主机相比。因此，预计L2CAP层进行一些简单的资源管理提交的L2CAP PDU（协议数据单元协议数据单元）的控制器传输到对端（对等的）设备时。这包括分割L2CAP SDU的分成更容易管理的PDU和PDU的再破碎成适合的控制器缓冲区大小的开始和延续的数据包，并使用控制缓冲区的管理，以确保可用性通道，服务质量（QoS ）承诺。The baseband layer provides the basic ARQ protocol（Auto Repeat Request） in Bluetooth technology. The L2CAP layer can optional

22、ly provide a further error detection and retransmission to the L2CAP PDUs. This feature is recommended for applications with requirements for a low probability of undetected errors in the user data. A further optional feature of L2CAP is a window-based flow control that can be used to buffer allocat

23、ion in the receiving device. Both of these optional features augment the QoS performance in certain scenarios.基带层提供基本的ARQ协议（自动重传请求协议）蓝牙技术。 L2CAP层可以选择性地提供进一步的错误检测和重发来的L2CAP的PDU。该功能被推荐用于对未检测到错误，在用户数据的概率低要求的应用程序。 L2CAP的又一可选特征在于，可用于在接收设备中缓冲区分配一个基于窗口的流量控制。这两个可选功能增强在某些情况下的QoS性能Although these assumptions m

24、ay not be required for embedded Bluetooth technology implementations that combine all layers in a single system, the general architectural and QoS models are defined with these assumptions in mind, in effect a lowest common denominator虽然可能不需要的嵌入式蓝牙技术实现，将所有图层在一个系统中这些假设，一般的建筑和QoS模型定义与这些假设一点，实际上是一个最小的共

25、同特性Automated conformance testing（符合性检测） of implementations of the Bluetooth core system is required. This is achieved by allowing the tester to control the implementation through the RF interface, which is common to all Bluetooth system, and through the test control interface （TCI）, which is only re

26、quired for conformance testing.蓝牙核心系统实现自动化的一致性测试是必需的。这是通过允许测试仪（试验者），通过RF接口，这是通用于所有蓝牙系统，并通过测试控制接口，这是唯一需要的一致性测试，以控制方面取得。The tester uses exchanges with the implementation under test （ITU） through the RF interface to ensure the correct responses to requests from remote devices. The tester controls the I

27、UT through the TCI to cause the ITU to originate exchanges through the RF interface so that these can also be verified as conformant.该测试仪采用交流下，通过RF接口测试（ ITU）的实施，确保从远程设备的请求的正确响应。测试仪控制IUT通过TCI使国际电联通过RF接口发起交换，使这些物质也可以作为符合性验证。The TCI uses a different command-set （service interface） for the testing of ea

28、ch architectural layer and protocol. A subset of the HCI command-set issued（发行） as the TCI service interface for each of the layers and protocols within the Bluetooth controller subsystem. A separate service interface is used for testing the L2CAP layer and protocol. As an L2CAP service interface is

29、 not defined in the Bluetooth core specification it is defined separately in the TCI specification. Implementation of the L2CAP service interface is only required for conformance testing.TCI使用不同的命令集（服务接口）为每个架构层和协议的测试。发出的HCI命令集作为TCI服务接口为每个蓝牙控制器子系统内的层和协议的一个子集。一个单独的服务接口是用于测试的L2CAP层和协议。作为一个L2CAP服务接口未在蓝牙

30、核心规范中定义它是在TCI规范分别定义的。只需要进行一致性测试的L2CAP服务接口的实现。Why choose Bluetooth wireless technologyBluetooth wireless technology is the simple choice for convenient, wire free, and short-range communication between devices. It is a globally available standard that wirelessly connects mobile phones, portable compu

31、ters, cars, stereo headsets, MP3 players, and more. Thanks to the unique concept of “profiles”, Bluetooth enabled products do not need to installed driver software. The technology is now available in its fourth version of the specification and continues to develop, building on its inherent strengths small-form factor radio, low power, low cost, built-in security, robustness, ease