公开(公告)号：US20100130129A1

公开(公告)日：2010-05-27

申请号：US12313870

申请日：2008-11-25

申请人： Jue Chang ,  Yujie Zhu ,  Heping Shi ,  Wei Liu ,  Xinsi Lin ,  Kunquan Sun ,  Meng Zhao

发明人： Jue Chang ,  Yujie Zhu ,  Heping Shi ,  Wei Liu ,  Xinsi Lin ,  Kunquan Sun ,  Meng Zhao

IPC分类号： H04B7/00

CPC分类号： H04W28/06 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06 ,  H04W92/02

摘要： Described is a WLAN/BT system with improved compatibility. It employs an adaptive algorithm that dynamically optimizes the WLAN data fragmentation size based on the current WLAN data rates such that the fragmented data packets fit the time slots allowed by the BT SCO stream gaps. The algorithm first uses system level information to acquire the concurrent BT traffic types to decide if TDM method needs to be enabled. Then it uses the smoothed WLAN date rate to calculate maximum fragmentation packet size consistent with current overall WLAN traffic.

摘要翻译： 描述了具有改进的兼容性的WLAN / BT系统。 它采用一种自适应算法，根据当前的WLAN数据速率动态优化WLAN数据碎片大小，使得分段的数据包适合BT SCO流间隙允许的时隙。 该算法首先使用系统级信息来获取并发的BT流量类型，以决定是否需要启用TDM方法。 然后，它使用平滑的WLAN日期速率来计算与当前整体WLAN流量一致的最大碎片包大小。

公开(公告)号：US06272315B1

公开(公告)日：2001-08-07

申请号：US09061420

申请日：1998-04-16

申请人： Jue Chang ,  Wing F. Lo ,  Won S. Kim

发明人： Jue Chang ,  Wing F. Lo ,  Won S. Kim

IPC分类号： H04B7185

CPC分类号： H04W36/12 ,  H04B7/18545 ,  H04B7/18563 ,  H04W88/06

摘要： Methods for switching a mobile between operation in an mobile satellite system mode and a terrestrial wireless mode. When operating in the terrestrial wireless mode, the mobile terminal will initiate an attempt to switch into the MSS mode when it nears the boundary of the coverage area for a terrestrial wireless system to which it is registered. Conversely, a mobile terminal operating in the MSS mode will regularly attempt to switch into the terrestrial wireless mode. For both, a switch between modes is contingent on the mobile terminal identifying a suitable system for registration therewith upon completing the switch between modes. The criteria for identifying a suitable system for selection purposes include the following: (1) the selected system is available, i.e., the mobile terminal is physically located within a coverage area for the selected system; (2) the mobile terminal is compatible with the selected system; and (3) the selected system is willing to accept the mobile terminal. If multiple systems meet these criteria, the mobile terminal will utilize a stored list of preferred systems to select therefrom. When switching into the terrestrial wireless mode, the MSS system provides the mobile terminal with switch-over information for the underlying terrestrial wireless systems and, when switching into the MSS mode, the terrestrial wireless system provides the mobile terminal with switch-over information for the overlying MSS systems.

摘要翻译： 用于在移动卫星系统模式的操作与地面无线模式之间切换移动站的方法。 当在地面无线模式下操作时，当移动终端接近其登记的地面无线系统的覆盖区域的边界时，移动终端将发起切换到MSS模式的尝试。 相反，以MSS模式工作的移动终端将定期地尝试切换到地面无线模式。 对于两者，模式之间的切换取决于移动终端在完成模式之间的切换时识别用于登记的适当系统。 用于识别用于选择目的的合适系统的标准包括：（1）所选择的系统是可用的，即移动终端物理上位于所选系统的覆盖区域内; （2）移动终端与所选系统兼容; （3）所选系统愿意接受移动终端。 如果多个系统满足这些标准，则移动终端将利用存储的优选系统列表来从中选择。 当切换到地面无线模式时，MSS系统向移动终端提供用于底层地面无线系统的切换信息，并且当切换到MSS模式时，地面无线系统向移动终端提供切换信息 覆盖MSS系统。

公开(公告)号：US06240072B1

公开(公告)日：2001-05-29

申请号：US09055622

申请日：1998-04-06

申请人： Wing Lo ,  Jue Chang

发明人： Wing Lo ,  Jue Chang

IPC分类号： H04B7204

CPC分类号： H04B7/2041

摘要： The satellite communication system uses defocused feed arrays to generate a large number of beams that cover a number of regions. The ground gateways are assigned the same frequency spectrum. The beams are divided into multiple groups and each group is controlled by a different ground gateway. The signals within each group are coherent. Each gateway can then control the set of beams landing on its neighboring territory.

摘要翻译： 卫星通信系统使用散焦馈电阵列来产生覆盖多个区域的大量波束。 地面网关分配相同的频谱。 光束分为多组，每组由不同的地面网关控制。 每组内的信号是相干的。 然后，每个网关可以控制着陆在其相邻区域上的一组波束。

公开(公告)号：US6016124A

公开(公告)日：2000-01-18

申请号：US55374

申请日：1998-04-06

申请人： Wing Lo ,  Jue Chang

发明人： Wing Lo ,  Jue Chang

IPC分类号： H01Q3/26

CPC分类号： H01Q3/26 ,  H04B7/18515 ,  H04B7/2041

摘要： A plurality of bit stream formatters formats and codes the digital information signals that are to be transmitted. A symbol generator generates I and Q symbols from the formatted information signals. These symbols are input to the beamforming matrix that is connected directly to the symbol generators. The beamforming matrix generates baseband beam signals from the I and Q symbols. Baseband, pulse-shaping, low-pass filters are connected to the beamforming matrix. The low-pass filters each generate an antenna feed signal from each of the baseband beam signals.

摘要翻译： 多个比特流格式化器对要发送的数字信息信号进行格式化和编码。 符号发生器从格式化的信息信号生成I和Q符号。 这些符号被输入到直接连接到符号发生器的波束形成矩阵。 波束成形矩阵从I和Q符号生成基带波束信号。 基带，脉冲整形，低通滤波器连接到波束成形矩阵。 低通滤波器各自从每个基带波束信号产生天线馈送信号。

公开(公告)号：US06937570B2

公开(公告)日：2005-08-30

申请号：US10289608

申请日：2002-11-07

申请人： Yogesh Bhatt ,  Jue Chang ,  Vyankatesh Shanbhag

发明人： Yogesh Bhatt ,  Jue Chang ,  Vyankatesh Shanbhag

IPC分类号： H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04L12/28 ,  H04L12/56 ,  G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04J3/16 ,  H04J3/22 ,  H04L12/26

CPC分类号： H04W28/12 ,  H04L1/0002 ,  H04L1/1671 ,  H04L1/188 ,  H04L2001/0092 ,  H04W28/18

摘要： A system, method, and apparatus for maintaining the status of communications between a wireless client and a content source is presented herein. During periods where the wireless link at the wireless client has deteriorated, a wireless content switch prevents timers at the content source from expiring by transmitting an acknowledgment message to the content source. The acknowledgement also stops the content source from transmitting data packets to the wireless client by indicating a zero window size. Additionally, during the time period that the wireless link to the wireless client is deteriorated, the wireless content switch responds to communications from the content source for the wireless client.

摘要翻译： 本文给出了用于维持无线客户端和内容源之间的通信状态的系统，方法和装置。 在无线客户端的无线链路恶化的期间，无线内容交换机通过向内容源发送确认消息来阻止内容源的定时器到期。 该确认还通过指示零窗口大小来阻止内容源向无线客户端发送数据分组。 此外，在到无线客户端的无线链路恶化的时间段期间，无线内容交换机响应来自无线客户端的内容源的通信。