公开(公告)号：US20040223537A1

公开(公告)日：2004-11-11

申请号：US10766968

申请日：2004-01-28

Applicant: NORTEL NETWORKS LIMITED.

Inventor： Moussa Abdi ,  Alexandre Jard ,  Hassan El Nahas El Homsi ,  Jean-Marc Corbel

IPC: H04B001/707

CPC classification number: H04B1/7105 ,  H04B1/71075

Abstract: The signal received comprises contributions from several channels multiplexed by respective spreading codes. After having estimated response parameters of the channels, soft estimates of the symbols transmitted are calculated. These symbols are then apportioned between a first set of symbols satisfying a confidence criterion applied to the calculated soft estimates and a second set of symbols not satisfying this criterion. A modified signal is determined by subtracting estimated contributions corresponding to the symbols of the first set from the signal received. New soft estimates of the symbols of the second set only are calculated, as a function of the modified signal and of the estimated response parameters, and this may be done with a detection algorithm of more complex nature, in particular a multi-user algorithm, by virtue of the size reduction performed by restricting oneself to the symbols of the second set.

Abstract translation: 所接收的信号包括由相应的扩展码复用的多个信道的贡献。 在估计了信道的响应参数之后，计算发送的符号的软估计。 这些符号然后在满足应用于所计算的软估计的置信度标准的第一组符号和不满足该标准的第二组符号之间分摊。 通过从接收到的信号中减去与第一组的符号相对应的估计的贡献来确定修改的信号。 作为修改信号和估计的响应参数的函数，仅计算第二组的符号的新的软估计，并且可以使用更复杂性质的检测算法，特别是多用户算法来完成， 凭借通过限制自己到第二组的符号来执行的尺寸减小。

公开(公告)号：US20040223455A1

公开(公告)日：2004-11-11

申请号：US10800119

申请日：2004-03-12

Applicant: Nortel Networks Limited

Inventor： Mo-Han Fong ,  Jun Li ,  Sophie S. Vrzic ,  Ali Iraqi ,  Ashvin H. Chheda

IPC: H04L012/28

CPC classification number: H04W72/1284 ,  H04W52/365

Abstract: A wireless communications network includes a mobile station and base station that are capable of communicating over a wireless link. Information relating to a status of a buffer in the mobile station and information relating to a data rate over a reverse wireless links is communicated over the reverse wireless link.

Abstract translation: 无线通信网络包括能够通过无线链路进行通信的移动站和基站。 与反向无线链路上的数据速率相关的信息与移动台中的缓冲器的状态相关的信息通过反向无线链路传送。

公开(公告)号：US20040208618A1

公开(公告)日：2004-10-21

申请号：US10209904

申请日：2002-08-02

Applicant: Nortel Networks Limited

Inventor： Kim B. Roberts ,  Richard D. Habel ,  Maurice S. O' Sullivan

IPC: H04B010/00 ,  H04B010/12

CPC classification number: H04B10/2569

Abstract: A method and system is provided for compensating polarization mode dispersion (PMD) in an optical communications system includes a controller designed to control a broadband PMD compensator to differentially delay light at each one of a plurality of selected wavelengths. At least one of the selected wavelengths lies between an adjacent pair of channel wavelengths of the optical communications system. A performance parameter value indicative of PMD is measured at each channel wavelength of the optical communications system. An estimated performance parameter value is then calculated at each selected wavelength, and an error function calculated as a function of wavelength based on the estimated performance parameter values. The broadband PMD compensator is then controlled to minimize the value of the error function.

Abstract translation: 提供了一种用于补偿光通信系统中的偏振模色散（PMD）的方法和系统，包括设计成控制宽带PMD补偿器差分延迟多个选定波长中的每一个处的光的控制器。 所选择的波长中的至少一个位于光通信系统的相邻的一对通道波长之间。 在光通信系统的每个信道波长处测量指示PMD的性能参数值。 然后在每个选择的波长处计算估计的性能参数值，并且基于估计的性能参数值计算作为波长的函数的误差函数。 然后控制宽带PMD补偿器以最小化误差函数的值。

公开(公告)号：US20040208565A1

公开(公告)日：2004-10-21

申请号：US10014353

申请日：2001-12-14

Applicant: Nortel Networks Limited

Inventor： Kim B. Roberts ,  Wolfgang Oberhammer ,  Maurice S. O'Sullivan ,  Roland A. Smith

IPC: H04J014/02 ,  H04B010/00

CPC classification number: H04B10/2563 ,  H04J14/02

Abstract: A method and system for reducing non-linear signal degradation effects of WDM optical signals exacerbated by highly correlated bit patterns of optical waveforms in neighboring optical channels. Embodiments include offsetting the transmission times of signals in neighboring channels, and applying different scrambling patterns to the respective data streams prior to transmission on neighboring optical channels.

Abstract translation: 一种用于减少WDM光信号的非线性信号劣化效应的方法和系统，其由相邻光信道中的光波形的高度相关位模式加剧。 实施例包括抵消相邻信道中的信号的传输时间，以及在相邻光信道上传输之前将各种数据流应用不同的加扰模式。

公开(公告)号：US20040208525A1

公开(公告)日：2004-10-21

申请号：US10057896

申请日：2002-01-29

Applicant: NORTEL NETWORKS LIMITED

Inventor： Saeid Seydnejad ,  Frederic F. Simard ,  Yunjun Zhang

IPC: H04B010/08 ,  H04J014/02

CPC classification number: H04J14/005 ,  H04B10/0775 ,  H04B2210/075

Abstract: Optical performance monitoring of a dense wave division multiplex optical communication system is immune to effects of stimulated Raman scattering. Each wavelength is modulated by an orthogonal spreading code dither signal having a predetermined modulation index. At a receiver, a portion of the aggregate optical signal is tapped and passes through a wavelength dependant optical delay filter. For each wavelength, the aggregate signal is multiplied by a synchronized copy of a respective spreading code and an autocorrelator detects the modulation power of the spreading code dither. The system can also be deployed as an optical reflectometer. For each autocorrelator, an aggregate reflected signal is multiplied by a copy of a spreading code having a respective different time delay. The distance to a reflection can be estimated from the time delay that yields the highest autocorrelation value.

Abstract translation: 密集波分复用光通信系统的光学性能监测免受受激拉曼散射的影响。 每个波长由具有预定调制指数的正交扩频码抖动信号调制。 在接收机处，聚合光信号的一部分被抽头并通过依赖于波长的光学延迟滤波器。 对于每个波长，聚合信号乘以相应扩展码的同步副本，并且自相关器检测扩展码抖动的调制功率。 该系统也可以部署为光学反射计。 对于每个自相关器，聚合反射信号乘以具有各自不同时间延迟的扩展码的副本。 可以从产生最高自相关值的时间延迟估计到反射的距离。

公开(公告)号：US20040197103A1

公开(公告)日：2004-10-07

申请号：US10405236

申请日：2003-04-03

Applicant: Nortel Networks Limited

Inventor： Kim B. Roberts ,  Leo Strawczynski ,  Maurice S. O'Sullivan

IPC: H04B010/00

CPC classification number: H04B10/2543

Abstract: Nonlinearity-induced signal distortions are compensated by processing an input communications signal, in the electrical domain prior to Electrical-to-optical conversion and transmission through an optical link of a communications system. According to the invention, a compensation operator is determined that substantially mitigates the nonlinearity-induced signal distortions imparted to an optical signal traversing the communications system. The input communications signal is then input to the compensation operator to generate a predistorted electrical signal. This predistorted electrical signal is then used to modulate an optical source to generate a corresponding predistorted optical signal for transmission through the optical communications system. With this arrangement, arbitrary nonlinearity-induced signal distortions imparted by the optical link can be compensated in such a manner that a comparatively undistorted optical signal is obtained at the receiving end of the optical link.

Abstract translation: 在通过通信系统的光链路的电 - 光转换和传输之前，通过处理电域中的输入通信信号来补偿非线性引起的信号失真。 根据本发明，确定补偿算子，其基本上减轻施加到穿过通信系统的光信号的非线性引起的信号失真。 然后将输入通信信号输入到补偿操作器以产生预失真的电信号。 然后，该预失真的电信号用于调制光源以产生用于通过光通信系统传输的相应的预失真光信号。 通过这种布置，可以以在光链路的接收端获得相对不失真的光信号的方式来补偿由光链路赋予的任意非线性引起的信号失真。

公开(公告)号：US20040162052A1

公开(公告)日：2004-08-19

申请号：US10774672

申请日：2004-02-09

Applicant: Nortel Networks Limited

Inventor： Ke-Chi Jang ,  Robert E. Denman ,  Chung-Ching Wang

IPC: H04Q007/20

CPC classification number: H04W4/90 ,  H04W8/18 ,  H04W76/50

Abstract: A computer data signal including a plurality of wireless mobile device native capability data and a status indicator of a non-emergency-services position-determination (NESPD) capability. The NESPD capability is user-selectable.

Abstract translation: 一种计算机数据信号，包括多个无线移动设备原生能力数据和非紧急服务位置确定（NESPD）能力的状态指示符。 NESPD功能是用户可选择的。

公开(公告)号：US20040151130A1

公开(公告)日：2004-08-05

申请号：US10747077

申请日：2003-12-30

Applicant: NORTEL NETWORKS LIMITED

Inventor： Maged E. Beshai ,  Richard Vickers

IPC: H04L012/28

CPC classification number: H04L45/02 ,  H04L12/28 ,  H04L43/00 ,  H04L45/025 ,  H04L45/22 ,  H04L45/28 ,  H04L45/42 ,  H04L45/54

Abstract: In a communication network comprising nodes and links between the nodes, a controller node disseminates link state information. A nodal routing table exists at each node comprising routes between pairs of nodes. The nodal routing table is either populated by the given node based on network information received from the controlling node or populated at the controlling node and received by the given node. Each node receives heartbeat signals from its neighbouring nodes. An unexpected delay between heartbeat signals may be perceived as a failure of a link. The perceived failure of that link is reported by the perceiving node to the controlling node. Upon receiving link failure information from a node, the controlling node may determine a subset of nodes in the network influenced by the link failure and indicate the link failure to the determined subset of influenced nodes.

Abstract translation: 在包括节点之间的节点和链路的通信网络中，控制器节点传播链路状态信息。 节点路由表存在于包括节点对之间的路由的每个节点处。 节点路由表由给定节点根据从控制节点接收的网络信息填充，或由控制节点填充并由给定节点接收。 每个节点从其相邻节点接收心跳信号。 心跳信号之间意外的延迟可能被认为是链路故障。 感知节点向控制节点报告该链路感知到的故障。 在从节点接收到链路故障信息时，控制节点可以确定受链路故障影响的网络中的节点的子集，并且指示所确定的受影响节点的子集的链路故障。

公开(公告)号：US20040137850A1

公开(公告)日：2004-07-15

申请号：US10718423

申请日：2003-11-20

Applicant: NORTEL NETWORKS LIMITED

Inventor： Thierry Lucidarme ,  Nidham Ben Rached

IPC: H04B017/00

CPC classification number: H04W74/004 ,  H04L25/0202 ,  H04W74/0833

Abstract: The method seeks a high-performance detection of a signal burst transmitted on the initiative of a sender on a radio channel listened to by a receiver system. The transmitted burst represents a predetermined digital sequence, serving for example to request access to a radio system or to ensure the synchronization of a radio interface. Channel parameters representing a statistical behavior of the radio channel are estimated and a detection magnitude is evaluated on the basis of the estimated channel parameters and of a correlation between a signal received at the receiver system and the predetermined digital sequence. The estimated channel parameters comprise moments of order greater than 2 of the gain on the radio channel.

Abstract translation: 该方法寻求在由接收机系统收听的无线电信道上由发送者主动发送的信号突发的高性能检测。 发送的突发表示预定的数字序列，例如用于请求对无线电系统的访问或确保无线电接口的同步。 估计表示无线电信道的统计行为的信道参数，并且基于所估计的信道参数以及在接收机系统接收的信号与预定的数字序列之间的相关性来评估检测幅度。 估计的信道参数包括无线电信道上的增益大于2的阶数。

公开(公告)号：US20040123210A1

公开(公告)日：2004-06-24

申请号：US10667778

申请日：2003-09-22

Applicant: NORTEL NETWORKS LIMITED

Inventor： Benjamin Baudry ,  Olivier Isnard

IPC: H04L001/18

CPC classification number: H04L1/1678 ,  H04L1/1685 ,  H04L1/188

Abstract: Frames exchanged between a control unit and a radio terminal via base stations are encapsulated, with timestamping information, in frames over an asynchronous interface between the control unit and each station. The timestamping information accompanying a data frame over the asynchronous interface indicates an instant of transmission of the said frame by each station according to a time counter specific to the radio section of the connection. The information accompanying an acknowledgement frame over the asynchronous interface indicates an instant of reception of the said frame by each station according to the said time counter. The instant of transmission of a data frame is stored. On reception of an acknowledgement frame accompanied by a timestamping information element indicating an instant of reception and indicating the non-reception by the terminal of the said data frame, the reception of the acknowledgement frame is selectively taken into account for the retransmission of the said data frame, on the basis of a comparison between the said instants of reception and transmission.

Abstract translation: 通过基站在控制单元和无线电终端之间交换的帧通过控制单元和每个站之间的异步接口以帧的形式被封装在时间戳信息中。 通过异步接口伴随数据帧的时间戳信息指示根据连接的无线电部分专用的时间计数器，每个站发送所述帧的时刻。 伴随着异步接口的确认帧的信息指示根据所述时间计数器由每个站接收所述帧的时刻。 存储数据帧的发送时刻。 在接收到伴随有指示接收时刻的时间戳信息元素并且指示终端不接收所述数据帧的确认帧时，选择性地考虑对所述数据的重传的确认帧的接收 基于所述接收和发送时刻之间的比较。