公开(公告)号：US08223719B2

公开(公告)日：2012-07-17

申请号：US12553622

申请日：2009-09-03

申请人： Hyun-ha Hong ,  Ki-seop Han ,  Dae-ig Chang ,  Ho-jin Lee

发明人： Hyun-ha Hong ,  Ki-seop Han ,  Dae-ig Chang ,  Ho-jin Lee

IPC分类号： H04W4/00 ,  H04W36/00 ,  H04W24/00 ,  H04L12/56

CPC分类号： H04W36/0011 ,  H04W80/04 ,  H04W84/06 ,  H04W84/12

摘要： Provided are an apparatus for controlling handover between heterogeneous networks, a method of performing handover between heterogeneous networks in a mobile router, and a mobile router. The method includes determining whether a handover to a network employing a different method from a network to which the mobile router belongs is required based on information prestored in the mobile router, the network to which the mobile router belongs determined by current location information of the mobile router and performing the handover according to the result of the determination. Mobility detection time can be reduced by applying the handover technique between wireless/satellite networks based on link trigger and location to a mobile router moving at high speed. Thus, service interruption can be prevented regardless of movement speed, even in a satellite shadow region such as a station.

摘要翻译： 提供了一种用于控制异构网络之间的切换的装置，在移动路由器中的异构网络之间执行切换的方法和移动路由器。 该方法包括基于在移动路由器中预先存储的信息来确定是否需要使用与移动路由器所属的网络不同的方法的切换，移动路由器所属的网络由移动台的当前位置信息确定 路由器并根据确定的结果执行切换。 可以通过在基于链路触发和位置的无线/卫星网络之间通过移动高速移动路由器的切换技术来减少移动性检测时间。 因此，即使在诸如车站的卫星影像区域中，不管运动速度如何，都可以防止服务中断。

公开(公告)号：US20110044355A1

公开(公告)日：2011-02-24

申请号：US12812991

申请日：2009-09-11

申请人： Nam-kyung Lee ,  Ki-seop Han ,  Dae-ig Chang ,  Ho-jin Lee

发明人： Nam-kyung Lee ,  Ki-seop Han ,  Dae-ig Chang ,  Ho-jin Lee

IPC分类号： H04J3/24

CPC分类号： H04N21/4305

摘要： A method of reconstructing reference time information of a transmission frame in a digital satellite communication system is provided, including: receiving the transmission frame including reference time information; recording receiving time of start of frames of the plurality of physical layer frames included in the transmission frame; determining receiving time of a start of frame corresponding to the physical layer frames including the reference time information based on the recorded information when the physical layer frame including the reference time information is received; and reconstructing the reference time information based on the determined receiving time information of the start of frame. Network synchronization is stably acquired and maintained during two-way communication even in the satellite communication network environment.

摘要翻译： 提供了一种在数字卫星通信系统中重建传输帧的参考时间信息的方法，包括：接收包括参考时间信息的传输帧; 记录包括在所述传输帧中的所述多个物理层帧的帧的开始的接收时间; 当接收到包括参考时间信息的物理层帧时，基于所记录的信息确定与包括基准时间信息的物理层帧相对应的帧开始的接收时间; 以及基于所确定的帧开始的接收时间信息来重构参考时间信息。 即使在卫星通信网络环境中也可以在双向通信中稳定地获取和维护网络同步。