-
公开(公告)号：US5453865A
公开(公告)日：1995-09-26
申请号：US211411
申请日：1994-05-24
CPC分类号： H04B10/071 , H04B10/07
摘要： A system for monitoring a network in which a station is connected to the network and includes a transmitter and a receiver. The transmitter outputs a signal modulated with outgoing traffic onto the network and the receiver receives a signal from the network modulated with incoming traffic. The station includes a monitoring circuit which introduces a variable delay in a signal from the transmitter and combines the delayed signal with the received signal so as to produce an output dependent upon the correlation of the signal from the transmitter and the received signal at the given delay. Preferably, the network is an optical network and the delay is introduced by a programmable delay line.
摘要翻译： PCT No.PCT / GB92 / 01807 Sec。 371日期：1994年5月24日 102（e）日期1994年5月24日PCT提交1992年10月1日PCT公布。 出版物WO93 / 07687 日期：1993年04月15日。一种用于监测站点连接到网络并包括发射机和接收机的网络的系统。 发射机将输出业务调制的信号输出到网络上，并且接收机从接收到的流量调制的网络接收信号。 该站包括监测电路，其将来自发射机的信号中的可变延迟引入，并将延迟的信号与接收的信号进行组合，以产生取决于来自发射机的信号与给定延迟的接收信号的相关性的输出 。 优选地，网络是光网络，并且延迟由可编程延迟线引入。
-
公开(公告)号：US5572349A
公开(公告)日：1996-11-05
申请号：US371550
申请日：1995-01-11
CPC分类号： H04N7/17309 , H04J14/08 , H04J3/1694 , H04N7/22
摘要： A communications system having a line terminal(1), a plurality of customer terminals (2), and a passive optical network for supporting traffic between the line terminal and the customer terminals. The line terminal(I) has a terminal unit (BTS(n)) for relatively narrow bandwidth traffic, and a second terminal unit (BTS(1) to BTS(n-1)) for relatively wider bandwidth traffic. A time domain multiplexer (14) is arranged to multiplex the traffic from the first and second terminal unit for downstream transmission over the network (18). Each customer terminal (2) has a first service unit for relatively narrow bandwidth traffic and a second service unit for relatively wider bandwidth traffic. Each customer terminal (2) has a demultiplexer (22) arranged to receive multiplexed downstream traffic from the network (18), and to segregate the traffic between the first and second service unit. Each customer terminal (2) has control elements for generating relatively narrow bandwidth control signals for upstream transmission over the network, the second terminal unit (BTS(1) to BTS(n-1)) of the line terminal (1) being responsive to the control signals from a given customer terminal (2) to control the transmission of the relatively wider bandwidth traffic to that customer terminal. The downstream transmission is by TDM and the upstream transmission is by TDMA.
摘要翻译： 一种具有线路终端（1），多个客户终端（2）和用于支持线路终端与客户终端之间的业务的无源光网络的通信系统。 线路终端（I）具有用于相对窄带宽业务的终端单元（BTS（n））和用于相对较宽带宽业务的第二终端单元（BTS（1）至BTS（n-1））。 时域多路复用器（14）被布置为对来自第一和第二终端单元的业务进行复用，以便通过网络（18）进行下行传输。 每个客户终端（2）具有用于相对窄带宽流量的第一服务单元和用于相对较宽带宽流量的第二服务单元。 每个客户终端（2）具有多路分解器（22），其被布置为从网络（18）接收多路复用的下游业务，并且分离第一和第二服务单元之间的业务。 每个客户终端（2）具有用于产生用于网络上游传输的较窄带宽控制信号的控制元件，线路终端（1）的第二终端单元（BTS（1）至BTS（n-1））响应于 来自给定客户终端（2）的控制信号以控制对该客户终端的相对较宽带宽业务的传输。 下行传输是通过TDM，上行传输是通过TDMA。
-
公开(公告)号：US5367394A
公开(公告)日：1994-11-22
申请号：US50028
申请日：1993-04-29
IPC分类号： H04B10/07 , H04B10/272 , H04B10/08
CPC分类号： H04B10/07 , H04B10/272
摘要： A test apparatus is designed for use with a TPON system including a headend station connected via a fibre optic network to a plurality of terminations. The test apparatus is a self-contained unit including a connection for linking the apparatus to a termination, a first detection circuit which detects status signals generated by the termination, and a second detection circuit which detects alarm signals generated in the head-end station and transmitted to the termination in a downstream data frame. The test apparatus in response to the first and second test circuits provides an output which indicates the condition of the termination. In one example, a series of indicator lamps formed on the housing for the test apparatus are lit to provide the appropriate output.
摘要翻译： PCT No.PCT / GB91 / 02060 Sec。 371日期：1993年4月29日 102（e）日期1993年4月29日PCT 1991年11月21日PCT PCT。 WO92 / 10036 PCT出版物 日期1996年6月11日。一种测试装置被设计用于TPON系统，包括通过光纤网络连接到多个终端的前台。 测试装置是一种独立单元，包括用于将装置连接到终端的连接，检测由终端产生的状态信号的第一检测电路和检测在前端站中产生的报警信号的第二检测电路，以及 发送到下游数据帧中的终端。 响应于第一和第二测试电路的测试设备提供指示终止状态的输出。 在一个示例中，形成在用于测试设备的壳体上的一系列指示灯被点亮以提供适当的输出。
-
4.发明授权Passive optical network switchable between an operational mode and a diagnostic mode 失效无源光网络可在操作模式和诊断模式之间切换
公开(公告)号：US5548432A
公开(公告)日：1996-08-20
申请号：US395539
申请日：1995-02-28
IPC分类号： H04J14/08 , H04B10/00 , H04B10/02 , H04B10/079 , H04B10/08 , H04B10/20 , H04B10/207 , H04B10/272 , H04J3/00 , H04J3/14 , H04B9/00
CPC分类号： H04B10/0795 , H04B10/272
摘要： A head-end station for a passive optical network system arranged to transmit and receive TDMA frames having a header portion and a plurality of basic frames, each basic frame includes traffic bits and control bits. The head-end station includes a data transmitter which assembles and transmits downstream frames and also generates a diagnostic signal for transmission in a downstream frame, the station being switchable to a diagnostic mode in which it transmits the diagnostic signal in a downstream frame in the absence of other traffic, and also including a data receiver which receives upstream frames and detects a return of the diagnostic signal. In a preferred example, the head-end station may transmit a diagnostic signal in the header portion of each downstream frame. Also, in a test mode the transmit signal is looped back to the receiver to enable testing of the transmit receive function. Loop back is provided at three levels, namely the transmitter drive level, the monitored output level and at the laser output receiver input level.
摘要翻译： 一种用于无源光网络系统的前端站，被布置为发送和接收具有报头部分和多个基本帧的TDMA帧，每个基本帧包括业务位和控制位。 前端站包括组装和发送下行帧的数据发射机，并且还产生用于在下游帧中传输的诊断信号，所述站可切换到诊断模式，其中在不存在的情况下在下行帧中传送诊断信号 并且还包括接收上行帧并检测诊断信号返回的数据接收器。 在优选示例中，前端站可以在每个下游帧的报头部分中发送诊断信号。 此外，在测试模式下，发送信号被环回到接收机，以便能够测试发送接收功能。 在三个级别提供回路，即发射机驱动电平，监视输出电平和激光输出接收器输入电平。
-
公开(公告)号：US5353143A
公开(公告)日：1994-10-04
申请号：US859413
申请日：1992-05-26
申请人： Donald E. A. Clarke
发明人： Donald E. A. Clarke
CPC分类号： H04B10/66
摘要： A network head-end station (1) is arranged to receive an upstream TDMA frame comprising interleaved optical signals from a plurality of terminations (2) connected to the head-end station (1) by a fibre network (3). The upstream TDMA frame includes a quiet phase during which none of the terminations transmit. The station (1) includes an opto-electronic receiver (4), a DC clamping circuit (10) for the opto-electronic receiver (4) and a clamping pulse generator. The clamping pulse generator is arranged to generate a pulse at a predetermined time falling within the quiet phase to operate the DC clamping circuit to clamp signals received during the remainder of the TDMA frame to a DC reference level received during the quiet phase.
摘要翻译： PCT No.PCT / GB90 / 01607 Sec。 371日期：1993年5月26日 102（e）日期1993年5月26日PCT提交1990年10月18日PCT公布。 公开号WO91 / 06157 日期：1991年5月2日。网络前端站（1）被布置为接收包括来自通过光纤网络连接到头端站（1）的多个终端（2）的交错光信号的上行TDMA帧 3）。 上行TDMA帧包括一个静止阶段，在该阶段期间没有终端发送。 站（1）包括光电接收器（4），用于光电接收器（4）的直流钳位电路（10）和钳位脉冲发生器。 钳位脉冲发生器被布置为在静止相位内的预定时间产生脉冲，以操作DC钳位电路将在TDMA帧的其余部分期间接收到的信号钳位到在静止阶段期间接收的DC参考电平。
-
公开(公告)号：US5453988A
公开(公告)日：1995-09-26
申请号：US859481
申请日：1992-06-16
申请人： Donald E. A. Clarke
发明人： Donald E. A. Clarke
IPC分类号： H04J14/08 , H04B10/272 , H04J3/00 , H04J3/16
CPC分类号： H04B10/272
摘要： A head-end station for a passive optical network system is arranged to transmit and receive downstream and upstream multiplex data frames. The data frames include a plurality of basic frames, each basic frame including a plurality of traffic bits and a plurality of control bits. The head-end station includes a data receiver having a control processor arranged to receive control data, a control data buffer which provides a parallel data input to the control processor, a traffic interface and a serial-to-parallel converter. The converter receives upstream TDMA multiplexed frames and the parallel output from the converter is connected in parallel to the respective inputs of the control data buffer and the traffic interface. A data transmitter for such a head-end station also includes a control processor, a control buffer and a traffic interface. A parallel-to-serial converter receives the upstream TDMA. The parallel input to the converter is connected in parallel to the control data buffer and to the exchange interface. In a preferred aspect of the invention, the upstream and downstream TDMA frames include a header portion preceding the plurality of basic frames and the control data buffers are enabled both during the header portion and during the portions of the basic frames containing the control bits.
摘要翻译： PCT No.PCT / GB91 / 00100 Sec。 371日期：1992年6月16日 102（e）日期1992年6月16日PCT 1991年1月23日PCT PCT。 WO91 / 11867 PCT出版物 日期为1991年8月8日。用于无源光网络系统的头端站被设置为发送和接收下游和上游多路复用数据帧。 数据帧包括多个基本帧，每个基本帧包括多个业务位和多个控制位。 前端站包括具有控制处理器的数据接收器，其被布置为接收控制数据，提供并行数据输入到控制处理器的控制数据缓冲器，业务接口和串行到并行转换器。 转换器接收上行TDMA复用帧，并且来自转换器的并行输出并行连接到控制数据缓冲器和业务接口的相应输入。 用于这种头端站的数据发射机还包括控制处理器，控制缓冲器和业务接口。 并行到串行转换器接收上行TDMA。 转换器的并行输入并行连接到控制数据缓冲器和交换接口。 在本发明的优选方面，上行和下行TDMA帧包括在多个基本帧之前的报头部分，并且控制数据缓冲器在报头部分期间以及在包含控制位的基本帧的部分期间都被使能。
-
公开(公告)号：US5341365A
公开(公告)日：1994-08-23
申请号：US859412
申请日：1992-05-27
申请人： Donald E. A. Clarke
发明人： Donald E. A. Clarke
CPC分类号： H04B10/272 , H04J14/08 , H04J3/0682
摘要： A passive optical network includes a head-end station and a plurality of terminations. The terminations are responsive to control signals from the head-end station. The head-end station is arranged to receive frames having a predetermined bit rate and comprising signals transmitted by the terminations. Ranging pulses are transmitted from each of the terminations to the head-end station where the received ranging pulses are sampled at a high sampling rate greater than the predetermined bit rate. The data samples are applied to a processor which determines the phase and amplitude of the ranging pulses and generates control signals for the terminations to modify the phase or timing and amplitude of the transmissions from the terminations. A locally generated marker pulse may be applied to the incoming data frame before it is sampled in the head-end station, the marker pulse providing a phase and amplitude reference for use by the control processor.
摘要翻译： PCT No.PCT / GB90 / 01758 Sec。 371日期：1992年5月27日 102（e）日期1992年5月27日PCT 1990年11月17日PCT PCT。 出版物WO91 / 08623 日期1991年6月13日。无源光网络包括头端站和多个终端。 终端响应于来自头端站的控制信号。 头端站被布置成接收具有预定比特率并且包括由终端发送的信号的帧。 测距脉冲从每个终端发送到头端站，其中接收的测距脉冲以大于预定比特率的高采样率被采样。 将数据样本应用于确定测距脉冲的相位和幅度的处理器，并且生成终端的控制信号以修改来自终端的传输的相位或定时和幅度。 本地产生的标记脉冲可以在其进入数据帧中被采样到头端站之前被施加到标记脉冲，该标记脉冲提供相位和幅度参考以供控制处理器使用。
-
公开(公告)号：US5479286A
公开(公告)日：1995-12-26
申请号：US191501
申请日：1994-02-04
CPC分类号： H04N7/17318 , H04J14/0298 , H04N7/22
摘要： An optical fibre communications system includes a head end connected to n customers by an optical fibre network. The head end has a transmitter unit and a receiver unit, and each of the customers has an optical network unit with an optical receiver and a transmitter unit. The head end transmitter and receiver units are connected respectively to the receivers and the transmitter units of the customer optical network units by at least one passive optical network. The head end transmitter unit includes an optical transmitter driven by a sub-carrier multiplexer, the sub-carrier multiplexer having a plurality of input sub-carriers at different frequencies. One of the sub-carriers carries interactive signals provided by a further optical transmitter unit. The remaining sub-carriers carry broadband service signals. Each customer transmitter unit includes an optical transmitter and apparatus for multiplexing interactive signals and control signals to drive the optical transmitter. The head end includes a system control unit for controlling the transmission of broadband services by the head end transmitter unit in dependence upon the control signals received by the head end receiver unit from the customer transmitter units.
摘要翻译： 光纤通信系统包括通过光纤网络连接到n个用户的头端。 头端具有发射机单元和接收机单元，并且每个客户具有带有光接收机和发射机单元的光网络单元。 前端发射机和接收机单元通过至少一个无源光网络分别连接到客户光网络单元的接收机和发射机单元。 前端发送器单元包括由副载波复用器驱动的光发送器，副载波复用器具有不同频率的多个输入子载波。 一个子载波携带由另一个光发射机单元提供的交互信号。 其余的子载波承载宽带业务信号。 每个客户发射机单元包括光发射机和用于复用交互信号和控制信号以驱动光发射机的装置。 头端包括系统控制单元，用于根据头端接收机单元从客户发射机单元接收的控制信号来控制头端发射机单元的宽带业务的传输。
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.021 秒)
