公开(公告)号：US07653039B2

公开(公告)日：2010-01-26

申请号：US11356822

申请日：2006-02-17

申请人： Gyu-Woong Lee ,  Kwan-Soo Lee ,  Chang-Sup Shim ,  Yun-Je Oh ,  Jae-Hoon Lee ,  Seong-Taek Hwang

发明人： Gyu-Woong Lee ,  Kwan-Soo Lee ,  Chang-Sup Shim ,  Yun-Je Oh ,  Jae-Hoon Lee ,  Seong-Taek Hwang

IPC分类号： H04W4/00

CPC分类号： H04W92/02 ,  H04B10/2575 ,  H04L63/08 ,  H04W12/06 ,  H04W84/04 ,  H04W84/12 ,  H04W88/08 ,  H04W88/085

摘要： A network system for interworking a Wireless Local Area Network (W-LAN) and a 3rd-Generation (3G) mobile communication network through a Radio-over-Fiber(RoF) link and an authentication method in interworking in the network system are provided. The network system includes a 3G mobile communication network and a W-LAN system. The 3G mobile communication network includes a voice signal processing network connected to a Public Switched Telephone Network (PSTN) for voice call processing with respect to a predetermined mobile terminal, a packet data network for data communication with the predetermined mobile terminal, and a terminal device for communication with the predetermined mobile terminal. The W-LAN system is connected to the packet data network of the 3G mobile communication network to provide a W-LAN service to the predetermined mobile communication terminal. The W-LAN system is implemented in a plurality of Base Transceiver Stations (BTSs) included in the 3G mobile communication network through the RoF link.

摘要翻译： 提供了一种用于通过光纤无线（RoF）链路互通无线局域网（W-LAN）和第三代（3G）移动通信网络的网络系统，以及在网络系统中互通的认证方法。 网络系统包括3G移动通信网络和W-LAN系统。 3G移动通信网络包括连接到公共交换电话网（PSTN）的语音信号处理网络，用于相对于预定移动终端进行语音呼叫处理，用于与预定移动终端进行数据通信的分组数据网络，以及终端设备 用于与预定的移动终端进行通信。 W-LAN系统连接到3G移动通信网络的分组数据网络，以向预定的移动通信终端提供W-LAN服务。 W-LAN系统通过RoF链路在3G移动通信网络中包括的多个基站收发台（BTS）中实现。

公开(公告)号：US07474858B2

公开(公告)日：2009-01-06

申请号：US10849070

申请日：2004-05-19

申请人： Han-Lim Lee ,  Gyu-Woong Lee ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Han-Lim Lee ,  Gyu-Woong Lee ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04B10/00

CPC分类号： H04B10/505 ,  H04B10/5055 ,  H04B10/508

摘要： A duobinary optical transmission device provides duobinary optical transmission with improved quality by a technique that does not require an electrical low pass filter LPF.A duobinary optical transmission device includes at least one semiconductor optical amplifier (SOA). A light source outputs a carrier wave as an optical signal. A precoder encodes an input of a non-return-to-zero (NRZ) electrical signal. An interferometer type semiconductor optical amplification unit modulates the carrier wave according to a change of an applied bias current coupled to the encoded signal. An optical band pass filter (OBPF) receives the phase-modulated optical signal from the semiconductor optical amplification unit, filters the received phase-modulated optical signal according to a designated band, and outputs an optical duobinary signal.

摘要翻译： 双二进制光传输装置通过不需要电气低通滤波器LPF的技术提供具有改进质量的双向光传输。双二进制光传输装置包括至少一个半导体光放大器（SOA）。 光源输出载波作为光信号。 预编码器对不归零（NRZ）电信号的输入进行编码。 干涉仪型半导体光放大单元根据耦合到编码信号的施加的偏置电流的变化来调制载波。 光带通滤波器（OBPF）从半导体光放大单元接收相位调制光信号，根据指定频带对接收的相位调制光信号进行滤波，并输出光双二进制信号。

公开(公告)号：US20080102881A1

公开(公告)日：2008-05-01

申请号：US11977612

申请日：2007-10-25

申请人： Shuangfeng Han ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Han-Lim Lee

发明人： Shuangfeng Han ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Han-Lim Lee

IPC分类号： H04Q7/20 ,  H04M1/00

CPC分类号： H01Q3/30 ,  H04B7/0443 ,  H04B7/0669 ,  H04B7/0691 ,  H04W52/346 ,  H04W52/42

摘要： An apparatus that adaptively allocates transmission power for beam-forming combined with orthogonal space time block codes in a distributed wireless communication system, the apparatus including: sub-arrays for beam-forming, which are geographically distributed and each of which includes a plurality of distributed antennas placed in random groups. A central processing unit provides predetermined combinable power allocation schemes according to subsets in a plurality of the sub-arrays, identifying performances of the schemes by using information on large-scale fading of each of the sub-arrays fed back from a receiving party, setting a subset having best performance as an optimal subset according to the identified performances, and performing power allocation according thereto.

摘要翻译： 一种在分布式无线通信系统中自适应地分配与正交空间时间块码组合的波束成形的发射功率的装置，该装置包括：地理分布的波束形成子阵列，每个子阵列包括多个分布式 天线放置在随机组中。 中央处理单元根据多个子阵列中的子集提供预定的可组合功率分配方案，通过使用关于从接收方反馈的每个子阵列的大规模衰落的信息来识别方案的性能，设置 根据所识别的性能，具有作为最佳子集的最佳性能的子集，以及根据所识别的性能执行功率分配。

公开(公告)号：US20080056167A1

公开(公告)日：2008-03-06

申请号：US11737797

申请日：2007-04-20

申请人： Sang-Ho KIM ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Jae-Hun Cho ,  Jae-Hoon Lee

发明人： Sang-Ho KIM ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Jae-Hun Cho ,  Jae-Hoon Lee

IPC分类号： H04L5/14 ,  H04L5/16

CPC分类号： H04B10/25759 ,  H04W88/08 ,  H04W88/085

摘要： A radio-over-fiber (RoF) system and method for controlling a transmission time is provided. In a Time Division Duplex (TDD) wireless communication system comprising a Base Station (BS) having a donor and a remote connected thereto via am optical fiber, upstream and downstream Radio Frequency (RF) signals are transmitted and received, and by reliably transmitting a switch control signal to the remote and simultaneously compensating for a transmission time delay occurring in the optical cable, time synchronization of the upstream and downstream RF signals transmitted and received via antennas of the BS and the remote is controlled, thereby efficiently increasing the performance of a TDD wireless service system.

摘要翻译： 提供了一种用于控制传输时间的无线电光纤（RoF）系统和方法。 在包括具有供体的基站（BS）和经由光纤远程连接的基站（TDD）的时分双工（TDD）无线通信系统中，发送和接收上行和下行射频（RF）信号，并且通过可靠地发送 切换控制信号到远端，并同时补偿在光缆中发生的传输时延，控制通过BS和遥控器的天线发送和接收的上行和下行RF信号的时间同步，从而有效提高 TDD无线服务系统。

公开(公告)号：US20080037567A1

公开(公告)日：2008-02-14

申请号：US11891122

申请日：2007-08-09

申请人： Jae-Hun Cho ,  Seong-Taek Hwang ,  Hoon Kim ,  Yun-Je Oh

发明人： Jae-Hun Cho ,  Seong-Taek Hwang ,  Hoon Kim ,  Yun-Je Oh

IPC分类号： H04L12/28

CPC分类号： H04L12/4625 ,  H04L47/10 ,  H04L47/13 ,  H04L47/2408 ,  H04L47/2441 ,  H04L47/28 ,  H04L47/31 ,  H04L47/50 ,  H04L47/562

摘要： A method and apparatus for ensuring QoS in a synchronous Ethernet bridge are disclosed, in which a classifier classifies an ingress packet according to a PHB mapped to a DSCP value of the packet and provides the classified packet to one of a predetermined synchronous packet queue and a predetermined asynchronous packet queue, a buffer queue with a plurality of queues mapped to priority levels buffers the classified packet, a marker marks the buffered packet as a synchronous packet or, if the buffered packet is an asynchronous packet, marks the packet in a predetermined format corresponding to a priority level of the packet, and a synchronous Ethernet scheduler schedules the marked packet.

摘要翻译： 公开了一种用于确保同步以太网中的QoS的方法和装置，其中分类器根据映射到分组的DSCP值的PHB对入口分组进行分类，并将分类分组提供给预定的同步分组队列和 预定的异步分组队列，具有映射到优先级的多个队列的缓冲器队列缓冲分类分组，标记将缓冲分组标记为同步分组，或者如果缓冲分组是异步分组，则以预定格式标记分组 对应于分组的优先级，并且同步以太网调度器调度所标记的分组。

公开(公告)号：US07319818B2

公开(公告)日：2008-01-15

申请号：US11471152

申请日：2006-06-20

申请人： Jae-Hoon Lee ,  Yong-Gyoo Kim ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Jae-Hoon Lee ,  Yong-Gyoo Kim ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04J14/00

CPC分类号： H04J14/0226 ,  H04J14/02 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282

摘要： Disclosed is a wavelength-division-multiplexed passive optical network using a wavelength-locked optical transmitter. The wavelength-division-multiplexed passive optical network (WDM PON) includes a central office, which includes a plurality of downstream optical transmitters for outputting downstream optical signals having wavelengths according to downstream injection lights, a wavelength division multiplexer including a plurality of de-multiplexing ports linked to the plurality of the downstream optical transmitters by one-to-one, and a multiplexing port linked with the feeder fiber and performing wavelength division multiplexing and wavelength division de-multiplexing, and at least one optical switch interposed between the downstream optical transmitters and the de-multiplexing ports, inputting a downstream band light output from a selected downstream optical transmitter to the multiplexing port, and inputting a downstream optical signal output from a remaining downstream optical transmitter, which is not selected, to the de-multiplexing port.

摘要翻译： 公开了使用波长锁定光发射机的波分复用无源光网络。 波分复用无源光网络（WDM PON）包括中心局，其包括多个下行光发射机，用于输出具有根据下游注入光的波长的下行光信号，波分多路复用器包括多个解复用 通过一对一连接到多个下游光发射机的端口，以及与馈电光纤链接并执行波分复用和波分解除复用的复用端口，以及插入在下行光发射机之间的至少一个光开关 以及解复用端口，将从所选择的下游光发射机输出的下行带光输入到复用端口，以及将未被选择的剩余下行光发射机输出的下行光信号输入到解复用端口。

公开(公告)号：US20070174889A1

公开(公告)日：2007-07-26

申请号：US11646737

申请日：2006-12-28

申请人： Yong-Gyoo Kim ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Yong-Gyoo Kim ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04N7/173

CPC分类号： H04N7/17318 ,  H04N21/4886 ,  H04N21/64322 ,  H04N21/812 ,  H04N21/8451

摘要： An optical network is provided. The optical network includes a station to convert a downstream radio frequency (RF) signal to a downstream optical signal and convert an upstream optical signal to an upstream RF signal; and a remote access unit (RAU) to convert the downstream optical signal to a downstream RF signal and to convert the upstream RF signal to the upstream optical signal, wherein the RAU determines a non-transmission band portion on which data is not carried from the downstream RF signal and inputs upstream data in the non-transmission band.

摘要翻译： 提供光网络。 光网络包括将下行射频（RF）信号转换为下行光信号并将上游光信号转换为上行RF信号的站; 和远程接入单元（RAU），用于将下行光信号转换为下行RF信号，并将上行RF信号转换为上行光信号，其中，RAU确定不传送数据的非传输频带部分 下行RF信号并输入非传输频带中的上行数据。

公开(公告)号：US07187700B2

公开(公告)日：2007-03-06

申请号：US10730568

申请日：2003-12-08

申请人： Dong-Jae Shin ,  Dae-Kwang Jung ,  Jea-Hyuck Lee ,  Jung-Kee Lee ,  Seong-Taek Hwang ,  Yun-Je Oh

发明人： Dong-Jae Shin ,  Dae-Kwang Jung ,  Jea-Hyuck Lee ,  Jung-Kee Lee ,  Seong-Taek Hwang ,  Yun-Je Oh

IPC分类号： H01S3/13

CPC分类号： H04B10/572 ,  H01S5/4006

摘要： Disclosed is a method for maintaining wavelength-locking of a Fabry-Perot laser regardless of a change of external temperature even though a temperature controller is not used, and a wavelength division multiplexing (WDM) light source using the method, as an economical light source used in a WDM optical communication field. The WDM light source comprises a Fabry-Perot laser for injecting spectrum-spliced incoherent light to amplify and output only an oscillation mode matching with a wavelength of the injected light, and a bias controlling unit for adjusting a bias current supplied to the Fabry-Perot laser to a value adjacent to a threshold current of the Fabry-Perot laser, whose threshold current is changed according to a temperature and a relationship between the injected light changed depending to a temperature and a wavelength of the oscillation mode. Therefore, the bias current having a value adjacent to the threshold current of the Fabry-Perot laser is supplied to the Fabry-Perot laser, so that the Fabry-Perot laser can maintain an excellent transmission characteristic regardless of a change of temperature even though a temperature controller is not used.

摘要翻译： 公开了即使不使用温度控制器也能够保持法布里 - 珀罗激光器的波长锁定的方法，而不管外部温度的变化如何，并且使用该方法作为经济光源的波分复用（WDM）光源 用于WDM光通信领域。 WDM光源包括用于注入频谱拼接的非相干光的法布里 - 珀罗激光器，以放大和仅输出与注入的光的波长匹配的振荡模式;以及偏置控制单元，用于调节提供给法布里 - 珀罗 激光到与Fabry-Perot激光器的阈值电流相邻的值，其阈值电流根据温度改变，并且注入的光随温度变化和振荡模式的波长之间的关系而改变。 因此，具有与法布里 - 珀罗激光器的阈值电流相邻的值的偏置电流被提供给法布里 - 珀罗激光器，使得法布里 - 珀罗激光器可以保持优异的传输特性，而不管温度的变化，即使 温度控制器不使用。

公开(公告)号：US20060222365A1

公开(公告)日：2006-10-05

申请号：US11395099

申请日：2006-03-31

申请人： Dae-Kwang Jung ,  Seong-Taek Hwang ,  Yun-Je Oh ,  Jin-Woo Park ,  Il-Rae Kim

发明人： Dae-Kwang Jung ,  Seong-Taek Hwang ,  Yun-Je Oh ,  Jin-Woo Park ,  Il-Rae Kim

IPC分类号： H04J14/00

CPC分类号： H04J14/0226 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J14/0298

摘要： A SCM-PON using WDM includes: an OLT for transferring downstream data from an external service provider through downstream optical signals and transferring upstream data transferred through upstream optical signals to an outside; an ODN for distributing the downstream optical signals from the OLT and multiplexing the upstream optical signals to the OLT; and a plurality of ONUs for processing the downstream optical signals transferred from the OLT through the ODN and transferring upstream data of subscribers for the OLT through the upstream optical signals, wherein the optical signals between the OLT and the ONUs are divided into wavelength channels with different wavelengths and sub-carrier channels obtained by time-dividing the wavelength channels, and the upstream data and the downstream data are transferred through the sub-carrier channels.

摘要翻译： 使用WDM的SCM-PON包括：OLT，用于通过下行光信号从外部服务提供商传送下行数据，并将通过上行光信号传送的上行数据传送到外部; 用于分配来自OLT的下行光信号并将上行光信号复用到OLT的ODN; 以及多个ONU，用于处理从OLT通过ODN传送的下行光信号，并通过上行光信号传输OLT的用户的上行数据，其中OLT和ONU之间的光信号被分成不同的波长信道 通过时分波长信道获得的波长和子载波信道，并且上行数据和下行数据通过子载波信道传送。

公开(公告)号：US07110168B2

公开(公告)日：2006-09-19

申请号：US10847109

申请日：2004-05-17

申请人： Jeong-Seok Lee ,  Ho-In Kim ,  In-Kuk Yun ,  Seung-Woo Kim ,  Hyun-Cheol Shin ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Jeong-Seok Lee ,  Ho-In Kim ,  In-Kuk Yun ,  Seung-Woo Kim ,  Hyun-Cheol Shin ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04B10/12

CPC分类号： H04B10/506 ,  H01S3/2333 ,  H01S3/2383 ,  H01S5/005 ,  H01S5/5072 ,  H01S2301/02

摘要： Disclosed are optical signal transmission apparatus including a reflective gain-clamped semiconductor optical amplifier and optical communication system using the optical signal transmission apparatus, which can improve modulation speed and optical power by effectively suppressing intensity noise of an incoherent light source. The optical signal transmission apparatus comprises a light source; a reflective gain-clamped semiconductor optical amplifier to generate gain-clamped optical signals having a substantially constant output intensity in a gain saturation region; a wavelength division multiplexing apparatus configured to spectrum-slice light from the light source, provide the spectrum-sliced light to the reflective gain-clamped semiconductor optical amplifier, and multiplex optical signals gain-clamped by the reflective gain-clamped optical amplifier, and a circulator for inputting the light generated by the light source to the wavelength division multiplexing apparatus, and outputting the optical signal multiplexed by the wavelength division multiplexing apparatus to a transmission link.

摘要翻译： 公开了包括使用光信号传输装置的反射增益钳位半导体光放大器和光通信系统的光信号传输装置，其可以通过有效地抑制非相干光源的强度噪声来提高调制速度和光功率。 光信号传输装置包括光源; 反射增益钳位半导体光放大器，用于产生在增益饱和区中具有基本上恒定的输出强度的增益钳位光信号; 波长分割多路复用装置，被配置为对来自光源的光进行光谱分片，向经反射增益钳位的半导体光放大器提供频谱切割的光，并对由反射增益钳位的光放大器进行增益钳位的多路复用光信号，以及 循环器，用于将由光源产生的光输入到波分多路复用装置，并将由波分多路复用装置复用的光信号输出到传输链路。