公开(公告)号：WO1986000717A1

公开(公告)日：1986-01-30

申请号：PCT/GB1985000312

申请日：1985-07-11

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  CAMERON, Keith, Henderson

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: G02B06/30

CPC classification number: G02B6/4212 ,  G02B6/30 ,  G02B6/4239

Abstract: To make a low loss connection between the core (5) of a single mode optical fibre (1) and a waveguide (2) on a waveguide substrate (3), a support block (4) which straddles the waveguide (2) is mounted on the waveguide substrate (3). The end-face (6) of the optical fibre (1) is fixed to both the waveguide substrate (3) and the support block (4) with transparent, light curable, adhesive (8). The support block (4) may be affixed to the substrate (3) with the same adhesive as is used to fix the optical fibre (1) to the substrate (3).

公开(公告)号：WO1985005519A1

公开(公告)日：1985-12-05

申请号：PCT/GB1985000203

申请日：1985-05-14

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  GLEEN, Keith, Ernest

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: H04L11/00

CPC classification number: H04L43/50 ,  H04L1/24

Abstract: Apparatus for interfacing with X21 equipment is a microprocessor based device. The apparatus has a microprocessor (10) with associated memory (11, 12) which can be coupled to an X21 link by input/output devices (15, 16). The device (15) is a serial input/output device which is employed to operate bit/byte synchronous portions of the X21 protocol and the device (16) is a parallel input/output device which is arranged to carry out steady state functions. The apparatus can function as a tester for X21 equipment and may function as a DTE, a DCE or an exchange simulator between two DTES; alternatively it may function as an adaptor to allow non-X21 equipment such as a V24 terminal (141) to communicate with X21 equipment.

Abstract translation: 与X21设备接口的设备是基于微处理器的设备。 该装置具有一个具有相关存储器（11,12）的微处理器（10），该存储器可通过输入/输出装置（15,16）耦合到X21链路。 设备（15）是用于操作X21协议的比特/字节同步部分的串行输入/输出设备，并且设备（16）是并行输入/输出设备，其被配置为执行稳态功能。 该设备可用作X21设备的测试仪，可用作DTE之间的DTE，DCE或交换模拟器; 或者它可以用作适配器，以允许诸如V24终端（141）的非X21设备与X21设备通信。

公开(公告)号：WO1998018087A1

公开(公告)日：1998-04-30

申请号：PCT/GB1997002887

申请日：1997-10-20

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  BENYON, Paul, Robert

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: G06F17/30

CPC classification number: G06F17/30067 ,  G06F17/24

Abstract: Apparatus for use in a file storage and transfer system, the apparatus comprising a web server with a file store for storing at least a first HTML document, and a communications port for sending said first document via the Internet towards a terminal computer running a web browser, at which it may be edited and for receiving an edited file therefrom, arranged to recognise separate sections of said document, in which during stages of said editing, only sections of said document which are to be edited are carried over the Internet.

Abstract translation: 一种用于文件存储和传送系统的装置，该装置包括具有用于存储至少第一HTML文档的文件存储器的web服务器，以及用于经由因特网向运行web浏览器的终端计算机发送所述第一文档的通信端口 ，其可以被编辑并用于从其接收编辑的文件，被布置成识别所述文档的单独部分，其中在所述编辑的阶段期间，仅通过因特网承载要被编辑的所述文档的部分。

公开(公告)号：WO1997041668A1

公开(公告)日：1997-11-06

申请号：PCT/GB1997001125

申请日：1997-04-23

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  JOHNSON, David

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: H04L12/56

CPC classification number: H04L45/00 ,  H04Q3/0029 ,  H04Q2213/13522 ,  H04Q2213/13524 ,  H04Q2213/13541

Abstract: Communication traffic is allocated through a network of interconnected nodes (103). A communication path may be established between terminals (101) via a plurality of routes. Parameters are processed for portions of a set of potential routes to determine a notional cost of using each of these routes. An optimal level of traffic is identified for each route portion and a parameter (such as notional route length) is adjusted to make the use of said route more costly if the traffic for that portion exceeds said notional value and, in addition, if said traffic for said portion falls below said optimum value. A route is then selected with reference to route cost comparisons.

Abstract translation: 通过互连节点（103）的网络分配通信业务。 可以经由多条路径在终端（101）之间建立通信路径。 针对一组潜在路线的部分处理参数，以确定使用这些路线中的每一个的名义成本。 为每个路线部分识别最佳的业务水平，并且调整参数（例如概念路线长度）以使得如果该部分的业务超过所述名义值，并且另外如果所述业务量 所述部分的下降低于所述最佳值。 然后参考路线成本比较选择路线。

公开(公告)号：WO1996027966A1

公开(公告)日：1996-09-12

申请号：PCT/GB1996000536

申请日：1996-03-08

Applicant: OXFORD BROOKES UNIVERSITY ,  BRITISH TELECOMMUNICATIONS PLC ,  SMITH, Avril, Joy ,  ADAMS, John, Leonard

Inventor： OXFORD BROOKES UNIVERSITY ,  BRITISH TELECOMMUNICATIONS PLC

IPC: H04L12/56

CPC classification number: H04L12/5602 ,  H04L2012/5615 ,  H04L2012/5632 ,  H04L2012/5635 ,  H04L2012/5636 ,  H04L2012/5639 ,  H04L2012/5649 ,  H04Q11/0478

Abstract: In a broadband switching system for the switching of asynchronously transferred cells of data, a dynamic bandwidth controller (DBC) controls the application of data cells to an input port of the system, the data cells being supplied by a number of transmitting end-systems. When an end-system begins transmitting data cells, the DBC detects the presence of incoming cells and requests bandwidth from a connection admission control (CAC) forming part of the system. The switching system stores a table associating a number of signal sources connected to the input port with respective predetermined maximum transmission times and maximum transmission rates for the sources. When arrival of cells at the input port from one of the source is detected, the DBC and CAC operate together to allocate sufficient bandwidth in the switching system to allow the respective message size to be transmitted within the respective maximum transmission time. A guaranteed minimum rate of transmission is also guaranteed for the source.

Abstract translation: 在用于切换异步传输的数据单元的宽带交换系统中，动态带宽控制器（DBC）控制数据信元到系统的输入端口的应用，数据信元由许多发送终端系统提供。 当终端系统开始发送数据单元时，DBC检测入站单元的存在，并从构成系统一部分的连接许可控制（CAC）请求带宽。 切换系统存储将连接到输入端口的信号源的数量与各个预定的最大传输时间和源的最大传输速率相关联的表格。 当检测到来自一个源的信元到达输入端口时，DBC和CAC一起工作以在交换系统中分配足够的带宽，以允许相应的最大传输时间内发送相应的消息大小。 保证最低传输速率也能得到保证。

公开(公告)号：WO1996020545A1

公开(公告)日：1996-07-04

申请号：PCT/GB1995003017

申请日：1995-12-21

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  DAVIES, David, Arthur, Owen ,  ELLIS, Andrew, David

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: H04J14/08

CPC classification number: H04J14/08 ,  H04J14/083 ,  H04L7/0075

Abstract: A node for an optical time division multiplexed communication system, and a method of operating such a node, are disclosed. In embodiments of the invention, the node comprises a multiplexer for receiving a plurality of optical signals, and a source of optical radiation, which may be a continuous wave source, or a source of optical pulses. The node is arranged so that the outgoing optical time division multiplexed signal consists only of optical pulses from the source of optical radiation.

Abstract translation: 公开了一种用于光时分多路复用通信系统的节点和操作这种节点的方法。 在本发明的实施例中，节点包括用于接收多个光信号的多路复用器以及可以是连续波源或光脉冲源的光辐射源。 该节点被布置成使得出射光时分多路复用信号仅由来自光辐射源的光脉冲组成。

公开(公告)号：WO1996007281A1

公开(公告)日：1996-03-07

申请号：PCT/GB1995002070

申请日：1995-09-01

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  AZARMI, Nader ,  CORLEY, Stephen, Leslie

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: H04Q03/00

CPC classification number: H04L41/06 ,  H04L41/0896 ,  H04L41/32 ,  H04L41/5003 ,  H04L41/5009 ,  H04L2012/5626 ,  H04M3/2254 ,  H04Q3/0066 ,  H04Q11/0478 ,  H04Q2213/13503 ,  H04Q2213/13523

Abstract: A network management system (162) for a communications network (163) comprises management function software accessible to one or more workstations (160) and incorporating a data store (161) for management information. The network management system (162) is structured to accommodate a layered model of the network and pays particular attention to the Service Management Layer/Network Management Layer (SML/NML) interface. In fault and test management, the network management system (162) incorporates elements to apply constraints, feature agreements (Fas), which elements then determine diagnosis and reporting procedures in response to fault or performance report or test inputs to the system (162). The system (162) can be used to manage specific services, such as flexible bandwith services, carried by selected network technology, such as Asynchronous Transfer Mode (ATM) switching.

Abstract translation: 用于通信网络（163）的网络管理系统（162）包括可由一个或多个工作站（160）访问并且包括用于管理信息的数据存储（161）的管理功能软件。 网络管理系统（162）被构造为适应网络的分层模型，并特别注意服务管理层/网络管理层（SML / NML）接口。 在故障和测试管理中，网络管理系统（162）包括应用约束，特征协议（Fas）的元件，然后响应于对系统的故障或性能报告或测试输入，确定诊断和报告过程的元件（162）。 系统（162）可以用于管理诸如异步传输模式（ATM）切换等选择的网络技术所携带的特定服务，例如灵活的带宽服务。

公开(公告)号：WO1995004432A1

公开(公告)日：1995-02-09

申请号：PCT/GB1994001651

申请日：1994-07-29

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  PARKE, Ian

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: H04N07/32

CPC classification number: H04N19/577 ,  H04N19/433 ,  H04N19/51 ,  H04N19/61

Abstract: A system for encoding video frames in accordance with the MPEG standard, in real-time. Motion vectors are calculated during the forward prediction of B frames and P frames using a telescoping procedure. Similarly, a telescoping procedure is used for calculating motion vectors for B frames during backwards predictive coding. The use of telescoping for the backward predictive coding results in B frames being coded in the wrong order. The correct order for B frames is re-established by writing the frames to a buffer (97) in the order in which they are generated and then reading the frame data from the buffer in the order in which they are required for transmission or recording purposes. The use of the telescoping procedure reduces significantly the amounts of computation required for calculating motion vectors during predictive coding for frames which are displaced by more than one frame period. The use of a buffer to reorganise the frames does not add significantly to the overall hardware requirement because such a buffer would often be used for smoothing out irregular data rates.

Abstract translation: 一种用于根据MPEG标准实时编码视频帧的系统。 在使用伸缩程序的B帧和P帧的前向预测期间计算运动矢量。 类似地，在向后预测编码期间，使用伸缩程序来计算B帧的运动矢量。 对于反向预测编码，使用伸缩来导致B帧以错误的顺序编码。 通过将帧按照它们生成的顺序写入缓冲器（97），然后按照传输或记录目的的顺序从缓冲器读取帧数据来重新建立B帧的正确顺序 。 使用伸缩程序显着减少了在对多于一帧周期移位的帧的预测编码期间计算运动矢量所需的计算量。 使用缓冲区重新组织帧并不会显着增加总体硬件要求，因为这种缓冲区通常用于平滑不规则的数据速率。

公开(公告)号：WO1994008409A1

公开(公告)日：1994-04-14

申请号：PCT/GB1993002075

申请日：1993-10-06

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  PHOENIX, Simon, James, Daniel ,  BARNETT, Stephen, Mark

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: H04L09/08

CPC classification number: H04L9/0858

Abstract: A communication system uses single-channel quantum cryptography for the secure transmission of a key. A transmitter randomly selects one of a number of encryption alphabets corresponding to different non-commutating quantum mechanical operators. The transmitter and receiver then subsequently communicate to establish which of the transmitted signals were encoded and decoded using common operators. The signals which were transmitted and received using different operators, the discarded data, are analysed and the expected and measured statistics compared to determine whether an eavesdropper has intercepted the transmission. In a preferred example, the transmitter selects from three or more different encoding alphabets comprising at least two mutually orthogonal alphabets and one other intermediate alphabet. In this case, separate statistical tests may be applied to the discarded data encoded with the orthogonal alphabets and to the discarded data encoded with the intermediate alphabet.

Abstract translation: 通信系统使用单通道量子密码术来进行密钥的安全传输。 发射机随机选择对应于不同非换向量子力学算子的多个加密字母中的一个。 然后，发射机和接收机随后进行通信，以确定哪些传输的信号被编码和使用常规的操作符解码。 分析使用不同运营商发送和接收的信号，丢弃的数据，并比较预期和测量的统计数据，以确定窃听者是否已经拦截了传输。 在优选示例中，发射机从包括至少两个相互正交的字母和另一个中间字母表的三个或更多个不同的编码字母中选择。 在这种情况下，可以将单独的统计测试应用于用正交字母编码的丢弃数据和用中间字母编码的丢弃数据。

公开(公告)号：WO1993022855A1

公开(公告)日：1993-11-11

申请号：PCT/GB1993000863

申请日：1993-04-26

Applicant: BRITISH TELECOMMUNICATIONS PLC ,  SMITH, Kevin

Inventor： BRITISH TELECOMMUNICATIONS PLC

IPC: H04L07/027

CPC classification number: H04B10/299 ,  H04B10/2912 ,  H04L7/0075

Abstract: A system for recovering a clock from an optically encoded signal uses a mode-locked laser (4). A modulator (2) is connected in common with the laser cavity (3) of the laser and with a transmission path (1) which applies the input optically encoded signal to the modulator (2). The modulator (2) in response to the optically encoded signal modulates the phase and/or amplitude of light in the laser cavity (3) thereby locking the phase and frequency of an output pulse stream to the timing wave of the optically encoded signal. In a preferred example, the modulator is a non-linear optical modulator used for cross-phase modulation (XPM) of the light in the laser cavity.

Abstract translation: 用于从光学编码信号恢复时钟的系统使用锁模激光器（4）。 调制器（2）与激光器的激光腔（3）共同连接，并具有将输入的光编码信号施加到调制器（2）的传输路径（1）。 响应于光学编码信号的调制器（2）调制激光腔（3）中的光的相位和/或振幅，从而将输出脉冲流的相位和频率锁定到光学编码信号的定时波。 在优选示例中，调制器是用于激光腔中的光的交叉相位调制（XPM）的非线性光学调制器。