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    • 111. 发明授权
    • ONU function processing apparatus in ATM-PON system
    • ATM-PON系统中的ONU功能处理装置
    • US06614759B1
    • 2003-09-02
    • US09498921
    • 2000-02-04
    • Sang Ho LeeChan KimHong Ju Kim
    • Sang Ho LeeChan KimHong Ju Kim
    • H04L1256
    • H04L12/5601H04L2012/562H04L2012/5625H04L2012/5638H04L2012/5654
    • The present invention relates to an ATM-PON system realizing an access network of FTTC/H(fiber-to-the-curb/home), more particularly, to an optical network unit function processing apparatus in ATM-PON system linked directly to a plurality of subscriber's lines. The present invention includes an optical distribution network(ODN) matching part carrying out a function of a physical layer required for connecting an optical network unit (ONU)to an optical distribution network; an ATM processing part exchanging an ATM(asynchronous transfer mode) cell with the optical distribution matching part, the ATM processing part carrying out functions of changing a header of an interactive ATM cell, routing, QoS(quality of service) buffering according to service connecting levels, processing real-time OAM(operation administration and maintenance), and UPC(user parameter control); an AAL1 processing part exchanging an ATM cell with the ATM processing part and executing AAL(ATM adaptation layer)1 processing functions such as segmentation of subscriber lines, reassembly, disposal and generation of a pointer, disposal and generation of an ATM cell, restoration of ARTS(synchronous residual time stamp) clock, and cell delay variation(CDV); and a processor connecting part controlling operational modes of the optical distribution network matching part, the ATM processing part, and the AAL1 processing part and reading operational states thereof, the processor connecting part inserting an OAM cell interactively and extracting the OAM cell outside, the processor connecting part reading and writing an external upward/downward connecting memory for establishment and cancellation of connection.
    • 本发明涉及实现FTTC / H(光纤到路由/归属)接入网的ATM-PON系统,更具体地说涉及ATM-PON系统中的光网络单元功能处理装置, 多条用户线路。 本发明包括实现将光网络单元(ONU)连接到光分配网络所需的物理层的功能的光分配网络(ODN)匹配部分; ATM处理部分与光分配匹配部分交换ATM(异步传输模式)信元,ATM处理部分执行改变交互式ATM信元的报头的功能,路由,业务连接的QoS(服务质量)缓冲 级别,处理实时OAM(操作管理和维护)和UPC(用户参数控制); AAL1处理部分与ATM处理部分交换ATM信元并执行AAL(ATM适配层)1处理功能,例如用户线的分割,重新组装,处理和生成指针,处理和产生ATM信元,恢复 ARTS(同步剩余时间戳)时钟和单元延迟变化(CDV); 以及处理器,连接部分控制光分配网络匹配部分,ATM处理部分和AAL1处理部分的操作模式,并读取其操作状态,处理器连接部分以交互方式插入OAM小区并在外部提取OAM小区,处理器 连接部分读写外部上/下连接存储器,用于建立和取消连接。
    • 116. 发明授权
    • MEMS microphone
    • MEMS麦克风
    • US08750550B2
    • 2014-06-10
    • US13494336
    • 2012-06-12
    • Sang Ho LeeYong Hyun Shim
    • Sang Ho LeeYong Hyun Shim
    • H04R9/08H04R1/20
    • H04R19/005
    • A MEMS microphone includes a case having sidewalls, a top wall, and an opened bottom; a PCB attached to the bottom of the case; a MEMS chip, which is arranged on the PCB and includes an inner-MEMS space; and at least one sound hole formed through a surface of the case for introduction of external sounds, wherein an internal communicating unit which forms a sound path via which the sound hole and the inside-MEMS space communicate with each other is arranged inside the case such that external sounds introduced via the sound hole pass through the sound path and enter the inner-MEMS space.
    • MEMS麦克风包括具有侧壁,顶壁和开口底部的壳体; 一个PCB连接到壳体的底部; MEMS芯片,其布置在PCB上并且包括内部MEMS空间; 以及至少一个通过壳体的表面形成的用于引入外部声音的声孔,其中形成声孔和内部MEMS空间彼此连通的声道的内部通信单元布置在壳体内部 通过声孔引入的外部声音穿过声音路径并进入内部MEMS空间。