Abstract:
A wavelength initializing method using an external lookup table, and an optical transceiver of a wavelength variable type using the same are provided to perform wavelength initialization of a self-tuning way easily by mounting the lookup table to a controller of an external host and sharing a control function including a lookup function with the host. An optical transceiver(420) converts electrical signals into optical signals of wavelength variable type. A memory unit(430) stores a lookup table including information controlling the wavelength of the optical signals, and transmits the lookup table to an external host after connecting to the external host. The optical transceiver comprises a laser driver(412) which generates bias current, a laser diode(422) which converts electric signals into optical signals, and a wavelength control unit(423) which controls the wavelength of the optical signals after receiving the wavelength control information of the lookup table.
Abstract:
A PCS(Physical Coding Sublayer) apparatus and the Ethernet layer architecture of a T-PON(Tunable-Wavelength Passive Optical Network System) having a wavelength variable type optical source are provided to support a wavelength initialization and alignment of an ONT(Optical Network Terminal) based on a PLC-ECL(Planar Lightwave Circuit-External Cavity Laser) by independently determining an ONT optical signal. A PCS apparatus of a T-PON having a wavelength variable type optical source includes a wavelength monitoring unit(615), and an automatic recognition unit(614), a transmission unit(611), and a receiving unit(612). The wavelength monitoring unit(615) extracts wavelength information from a digital frame signal transmitted from an ONT, and monitors whether the wavelength information is ONT optical source assignment wavelength information or not. If the wavelength information is not matched with the optical source assignment information of the ONT, the automatic recognition unit(614) adds wavelength control information to the digital frame signal and transmits the added information to the ONT. If the wavelength information is matched with the optical source assignment information of the ONT, the transmission unit(611) encodes and transmits the data transmitted from the ONT to a MAC layer. The receiving unit(612) decodes and receives data of the MAC layer.
Abstract:
본 발명은 다중 채널로 구성된 링크에서 프레임 전달 순서를 유지하면서 프레임의 전송량을 효율적으로 분배하기 위한 다중 채널 링크에서 프레임의 순서유지 및 전송량 분배장치, 방법 및 이를 이용한 다중 채널 송신기에 관한 것이다. 본 발명은, 수신된 프레임의 정보를 이용하여 프레임의 순서유지 필요성 유무를 결정하고, 순서유지가 필요한 경우 프레임의 길이를 통하여 프레임 전송 완료 시간을 예측하고, 예측된 전송 완료 시간을 바탕으로 순서보호서비스시간(SPST)을 결정하여 순서보호버퍼(SPB)에 저장한 후, SPST 완료시점에 프레임을 유휴 전송기에 분배함으로써 채널사용의 효율을 극대화 할 수 있다. 다중 채널, 링크, 프레임, 전송량, 분배, 순서보호서비스시간(SPST), 순서보호버퍼(SPB), 유휴
Abstract:
The present invention relates to a WDM/SCM-PON and a media access control method for asymmetric packet communication in the same. In the WDM/SCM-PON, each SCM channel is classified and used as a link by adopting an SCM technique of subdividing a wavelength band of up/downstream data links between an OLT and ONTs into frequency bands, and the ONTs are formed so that a certain SCM channel is independently distributed not fixedly assigned. Accordingly, an inventory problem, which can be generated in WDM/SCM, is prevented before happens, asymmetric dynamic band allocation is performed, and asymmetric service of up/downstream transmission is supported. As a result, a band required for next generation service is dynamically provided, optical interference effect is minimized, and Ethernet compatibility is provided so that Ethernet service suitable for providing IP service can be accommodated.
Abstract:
Disclosed herein is a system for providing dynamic service using optical sub-carrier multiplexing type multi-channel access and method of controlling the same. The system includes a plurality of optical sub-carrier multiplexing modems, an optical gigabit-Ethernet switch and a plurality of wavelength division multiplexing couplers. The optical sub-carrier multiplexing modems transmit user traffic using multiple optical sub-carrier channel control. The optical gigabit-Ethernet switch is connected to an access network upstream and to the optical sub-carrier multiplexing modems downstream to manage a plurality of wavelengths and a plurality of optical sub-carrier channels according to the wavelengths. The wavelength division multiplexing couplers connect the plurality of optical sub-carrier multiplexing modems with the optical gigabit-Ethernet switch, perform aggregation and branching of a certain wavelength and transmit it.
Abstract:
PURPOSE: A dynamic service provision system using multi-channel connection of an optical sub-carrier multiple access method and a controlling method thereof are provided to maximize the efficiency of optical resource in a process for dividing one optical fiber into plural wavelength units by using a DWDM(Dense Wavelength Division Multiple access) method. CONSTITUTION: A dynamic service provision system using multi-channel connection of an optical sub-carrier multiple access method includes a plurality of optical sub-carrier multiple access modems, an optical giga-bit ethernet switch, and a plurality of WDM couplers. The optical sub-carrier multiple access modems(23) are used for transmitting user traffic by controlling a plurality of optical sub-carrier channels. The optical giga-bit ethernet switch(21) is connected to an access network and the optical sub-carrier multiple access modems in order to manage a plurality of wavelengths and the optical sub-carrier channels according to the wavelengths. The WDM couplers(22) are used for connecting the optical sub-carrier multiple access modems to the optical giga-bit ethernet switch in order to split and mux the particular wavelengths.
Abstract:
PURPOSE: An apparatus and a method for testing VLR(Visiting Location Register)/HLR(Home Location Register) functions in an ATM mobile communication system are provided to add VLR/HLR functions to a workstation in order to verify a mobility function without the necessity of installing a VLR and an HLR or using a special protocol analyzer and to execute tests through a user graphic interface so that a user can visually confirm test progress and results. CONSTITUTION: In order to see a test result, a user selects a log screen view on the graphic user screen using a menu function(712). Then, after inputting his name, the user can see the test result on the screen by confirms a log file(714). In case that the user wants to offer an IMT-2000 VLR/HLR mobility function or to execute function verification, the user first selects a mobility function test execution menu(715). Then the user selects a desired mobility function from a scenario menu(716). If the user wants to change the selected scenario, he can change it with another(717,718). If a test scenario is ready, the user pushes a start button to execute the IMT-2000 VLR/HLR mobility function(719-722).
Abstract:
본 발명은 교환시스템에 수용된 아날로그 가입자의 호처리 정보를 운용자에게 교환시스템 출력 매체를 통하여 제공하므로써 운용자가 해당 가입자를 감시하도록 한 종합정보통신망(Intergrated Services Digital Network)(이하, ISDN이라 함) 교환시스템의 아날로그 가입자 감시 방법에 관한 것으로, 운용자가 감시기능 등록 명령어를 입력하면 가입자 다이얼번호를 이용하여 번호 번역을 수행하고, 해당 교환 정합 프로세서는 감시기능 등록을 접수하여 감시기능 데이터베이스에 감시기능을 등록하여 운용자가 관찰을 하고자 하는 가입자에 대해 감시기능을 등록하는 제 1 단계; 상기 교환 정합 프로세서가 가입자로부터 후크 온 신호를 수신하면 감시기능 수행 결과를 상기 운용 및 유지보수 프로세서로 통보하고, 상기 운용 및 유지보수 프로세서가 감시기능 결과 메시지를 생성하며 입출력 장치로 출력하여 감시기능이 등록된 가입자에 대해 감시기능을 수행하는 제 2 단계; 및 운용자가 감시기능 해제 명령어를 입력하면 가입자 다이얼 번호를 이용하여 번호 번역을 수행하고, 해당 교환 정합 프로세서는 감시기능 해제 요청을 접수하여 감시기능 데이터베이스에서 감시기능을 해제하여 감시기능이 등록된 가입자에 대해 감시기능을 해제하는 제 3 단계를 포함하여 운용자는 시스템의 호처리 결과 및 가입자 서비스 요구 특성을 수집 가능하여 고장 부분의 조기 발견 등 시스템을 효율적으로 운용할 수 있는 효과가 있다.
Abstract:
A call state consultation processing method in a full electronic exchange quickly senses a call state disagreement phenomenon occurred by abnormal situation through a subscriber call state consultation step, prevent a network waste, and minimizes a call accounting disagreement public discontent of a subscriber. The method performs a periodic digital subscriber call state consult function in a busy state of a full electronic exchange, and minimizes a cost for modifying a program and a development cost.
Abstract:
본 발명은 분산 제어 교환 시스템에서 운용자의 간단한 MMC(Man Machine Communication) 명령어 입력으로 망 자원의 점유 상태를 운용자에게 보여주기 위한 가입자 서비스 제어신호 추적구현 방법에 관한 것으로, DDC(Digital subscriber Circuit mode Control) 블록, CTPS(Call Trace and Path Setup) 블록, CSL(Call Shared Library)블럭을 실장하여 가입자 제어신호 추적을 수행하는 ASP(Access Switching Processor)와, 상기 호추적 결과를 수집하여 운용자에게 추적 결과를 제공하는 CTPM(Call Trace and Path setup Maintenace) 블록이 실장된 OMP(Operation and Maintenance Processor)를 구비하는 분산 제어 교환 시스템에 적용되는 가입자 서비스 제어신호 추적구현 방법에 있어서, 가입자 제어신호 추적기능을 등록하는 제1단계; 상기 추적기능 등록 후, 통신 서비스 제공시 가입자 제어신호 추적이 수행처리되는 제2단계; 운용자가 해당 가입자에 대해 제어신호 추적을 취소하는 제3단계를 포함하는 것을 특징으로 하여, 가입자 통신 서비스의 유지보수를 위한 별도의 장치가 필요가 없어 경제적이고, 운용자가 간단한 MMC 명령어 입력으로 가입자 통신을 위한 제어 신호의 흐름을 일목요연하게 파악할 수 있으며, 통신 서비스에 장애가 발생된 경우에 고장의 위치 및 원인 정보를 알 수 있어 운용자가 신속하게 장애를 복구할 수 있는 효과가 있다.