公开(公告)号：US20100128821A1

公开(公告)日：2010-05-27

申请号：US12506515

申请日：2009-07-21

Applicant: Pan-soo Kim ,  Dae-ig Chang

Inventor： Pan-soo Kim ,  Dae-ig Chang

IPC: H04L27/06

CPC classification number: H04L27/2655 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662

Abstract: A satellite broadcasting frame signal demodulation method is disclosed. A demodulation method of a demodulator that demodulates a Digital Video Broadcasting-Satellite—Second Generation (DVB-S2) standard satellite broadcasting frame signal includes: performing symbol synchronization; performing frame synchronization after symbol synchronization; recovering a carrier wave after frame synchronization; and decoding mode code (MODCOD) information to obtain frame configuration information after recovering the carrier wave. This method ensures rapid demodulation and reliable demodulated data.

Abstract translation: 公开了一种卫星广播帧信号解调方法。 解调数字视频广播卫星 - 第二代（DVB-S2）标准卫星广播帧信号的解调器的解调方法包括：执行符号同步; 符号同步后执行帧同步; 帧同步后恢复载波; 和解码模式码（MODCOD）信息，以在恢复载波之后获得帧配置信息。 该方法确保快速解调和可靠的解调数据。

公开(公告)号：US20100290459A1

公开(公告)日：2010-11-18

申请号：US12812989

申请日：2009-09-11

Applicant: Nam-kyung Lee ,  Dae-ig Chang ,  Ho-jin Lee

Inventor： Nam-kyung Lee ,  Dae-ig Chang ,  Ho-jin Lee

IPC: H04L12/56

CPC classification number: H04N21/4385 ,  H04N21/2383 ,  H04N21/2389 ,  H04N21/242 ,  H04N21/4382 ,  H04N21/8547

Abstract: A variable length packet data transmission apparatus and method are provided. The variable length packet data transmission apparatus using a variable length packet transmission technique includes a data transmitter generating synchronization information for synchronizing data communication with a data receiving apparatus, including the generated synchronization information in transmission data to be transmitted according to a variable length packet transmission technique, and transmitting the transmission data including the synchronization information to the data receiving apparatus, and a data receiver receiving the transmission data including synchronization information from a data transmission apparatus, reconstructing the synchronization information included in the received transmission data, and performing synchronization with the data transmission apparatus using the reconstructed synchronization information.

Abstract translation: 提供了一种可变长度分组数据传输装置和方法。 使用可变长度分组传输技术的可变长度分组数据传输装置包括数据发射机，其生成用于与数据接收装置同步数据通信的同步信息，包括根据可变长度分组传输技术发送的传输数据中产生的同步信息 并且将包括同步信息的发送数据发送到数据接收装置，以及从数据发送装置接收包括同步信息的发送数据的数据接收装置，对接收的发送数据中包含的同步信息进行重构，并与数据进行同步 发送装置使用重构的同步信息。

公开(公告)号：US08223719B2

公开(公告)日：2012-07-17

申请号：US12553622

申请日：2009-09-03

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

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

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

CPC classification number: H04W36/0011 ,  H04W80/04 ,  H04W84/06 ,  H04W84/12

Abstract: 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.

Abstract translation: 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：US20110051745A1

公开(公告)日：2011-03-03

申请号：US12812987

申请日：2009-08-27

Applicant: Nam-kyung Lee ,  Dae-ig Chang ,  Ho-jin Lee

Inventor： Nam-kyung Lee ,  Dae-ig Chang ,  Ho-jin Lee

IPC: H04J3/24

CPC classification number: H04N21/2381 ,  H04N21/238 ,  H04N21/242 ,  H04N21/4305 ,  H04N21/6143 ,  H04N21/6193

Abstract: Provided is a satellite network communication system based on Second Generation Digital Video Broad-casting via Satellite (DVB-S2). A method for encapsulating transmission data in a digital satellite communication system includes: determining whether a time at which a reference time information packet has to be inserted into a packet data unit is arrived, in the digital satellite communication system; and if the time at which the reference time information packet has to be inserted into the packet data unit is arrived, transforming the packet data unit in the form of a baseband data packet including the reference time information packet. Therefore, by allowing transmission of Network Clock Reference (NCR) information in a satellite communication environment based on Generic Steam Encapsulation (GSE), bidirectional satellite communications are possible.

Abstract translation: 提供了基于通过卫星的第二代数字视频广播（DVB-S2）的卫星网络通信系统。 一种在数字卫星通信系统中封装发送数据的方法包括：在数字卫星通信系统中，确定是否必须将参考时间信息分组插入分组数据单元的时间到达; 并且如果要将参考时间信息包必须插入分组数据单元的时间到达，则以包括基准时间信息包的基带数据分组的形式变换分组数据单元。 因此，通过允许基于通用蒸汽封装（GSE）的卫星通信环境中的网络时钟参考（NCR）信息的传输，双向卫星通信是可能的。

公开(公告)号：US20110044355A1

公开(公告)日：2011-02-24

申请号：US12812991

申请日：2009-09-11

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

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

IPC: H04J3/24

CPC classification number: H04N21/4305

Abstract: 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.

Abstract translation: 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。