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    • 1. 发明授权
    • Dispersion shifted optical fiber and method of forming the same
    • 色散位移光纤及其形成方法
    • US06449416B1
    • 2002-09-10
    • US09222762
    • 1998-12-30
    • Ji-Hoon LeeMun-Hyun Do
    • Ji-Hoon LeeMun-Hyun Do
    • G02B622
    • G02B6/03633G02B6/02238G02B6/0281G02B6/0285G02B6/03638
    • A dispersion shifted optical fiber includes: a first core having a constant refractive index within a predetermined radius from the center of an optical fiber, a second core which covers the first core and has a refractive index which decreases from the refractive index of the first core with an increase in its radius, and a cladding which covers the second core and has a refractive index smaller than the minimum refractive index of the second core. Accordingly, the core structure of an optical fiber is controlled, and the optical fiber has a refractive index distribution being a complex of a staircase type having low dispersion and a triangular type having low loss, thus resulting in an optical fiber having low dispersion and low loss.
    • 色散位移光纤包括:具有从光纤中心起的预定半径内具有恒定折射率的第一芯体,覆盖第一芯体并具有从第一芯体的折射率减小的折射率的第二芯体 其半径增加,覆盖第二芯的折射率小于第二芯的最小折射率的包层。 因此,光纤的芯结构被控制,并且光纤的折射率分布是具有低色散的阶梯型和具有低损耗的三角形类型的复合物,因此导致具有低色散和低的光纤 失利。
    • 6. 发明授权
    • Method of beacon exchange between devices with asymmetric links and system using the method
    • 使用非对称链路的设备与使用该方法的系统之间的信标交换方法
    • US07715354B2
    • 2010-05-11
    • US11647573
    • 2006-12-29
    • Thenmozhi ArunanJi-Hoon LeeJung-Ho Kim
    • Thenmozhi ArunanJi-Hoon LeeJung-Ho Kim
    • H04W4/00
    • H04W88/04H04W76/10H04W84/18Y02D70/142Y02D70/144
    • A method and a system for using the method are provided. The method and system allow a low power device having an asymmetric link to access a wireless network to exchange beacons with any one of a plurality of normal power devices in the wireless network. The method includes the steps of confirming whether the low power device has the asymmetric link with the normal power device, when the low power device receives a beacon of the low power device based on the received beacon; negotiating with at least one relay device so that the low power device requests a relay with respect to the asymmetric link, when the low power device has an asymmetric link with the normal power device; and at least one relay device noting a result of the negotiation to the low power device and a normal power device with which the low power device is intending to communicate, based on the result of the negotiation.
    • 提供了一种使用该方法的方法和系统。 该方法和系统允许具有非对称链路的低功率设备接入无线网络以与无线网络中的多个正常功率设备中的任何一个交换信标。 该方法包括以下步骤:当低功率设备基于接收的信标接收低功率设备的信标时,确定低功率设备是否具有与正常功率设备的不对称链路; 当低功率设备与正常功率设备具有不对称连接时,与至少一个中继设备进行协商,使低功率设备相对于非对称链路请求中继; 以及至少一个中继装置,基于协商的结果向低功率设备和低功率设备想要通信的正常功率设备注意到协商的结果。