会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明授权
    • System and method for user terminal clock error measurement and correction
    • 用户终端时钟误差测量和校正的系统和方法
    • US06181912B2
    • 2001-01-30
    • US09150499
    • 1998-09-09
    • David S. MillerJeffrey A. Lorbeck
    • David S. MillerJeffrey A. Lorbeck
    • H04B7185
    • H04B7/2125
    • A method and apparatus useful for determining the accumulated error in a user terminal dock in a satellite communications system. The satellite communications system includes a gateway, a satellite with a known position and known velocity, and a user terminal having a deskew buffer clocked by a user terminal clock. The method includes the steps of computing the one-way signal delay between the satellite and the user terminal, computing a desired deskew buffer delay based on the computed one-way signal delay and a predetermined maximum value of said one-way signal delay, and computing the accumulated error in the user terminal clock based on the desired deskew buffer delay and the actual deskew buffer delay.
    • 一种用于确定卫星通信系统中的用户终端站中的累积误差的方法和装置。 卫星通信系统包括网关,具有已知位置和已知速度的卫星,以及具有由用户终端时钟计时的偏移缓冲器的用户终端。 该方法包括以下步骤:计算卫星与用户终端之间的单向信号延迟,基于所计算的单向信号延迟和所述单向信号延迟的预定最大值计算所需的偏移缓冲器延迟;以及 基于所需的偏移缓冲延迟和实际的偏移缓冲区延迟来计算用户终端时钟中的累积误差。
    • 4. 发明授权
    • Method and apparatus for adjacent service area handoff in communication systems
    • 通信系统中相邻服务区切换的方法和装置
    • US06549780B2
    • 2003-04-15
    • US09752941
    • 2000-12-29
    • Leonard N. SchiffDavid S. Miller
    • Leonard N. SchiffDavid S. Miller
    • H04Q720
    • H04B7/18541
    • A handoff technique in which system users detect transitions in service between a current service area and an adjacent service area, and request a forward link channel in the new service area when a detected signal strength for the new service area exceeds predetermined threshold levels. The forward communications link in the current service area is maintained until the strength of the new service area signal reaches a certain level and appropriate channel quality is confirmed, as based on various known criteria. Typically, service area transitions are detected using the signal strength of pilot or paging signals associated with service areas, which are used to determine a relative signal strength of new service area signals. Pilot signal level adjustments used to counter roll-off effects are detected and compensated for in comparing signal levels. To minimize the burden on system resources, new service area signals are not selectable until a minimum time has passed, or a minimum change in energy from a prior pilot signal is detected. In addition, communications using the previous service area can be dropped almost immediately upon engaging the new service area.
    • 一种切换技术,其中系统用户检测当前服务区域和相邻服务区域之间服务中的转换,并且当新服务区域的检测到的信号强度超过预定阈值电平时,请求新服务区域中的前向链路信道。 基于各种已知标准,保持当前服务区域中的正向通信链路,直到新服务区域信号的强度达到一定水平,并确认适当的信道质量。 通常,使用用于确定新的服务区域信号的相对信号强度的与服务区域相关联的导频或寻呼信号的信号强度来检测服务区域转换。 在比较信号电平时,检测并补偿用于计算滚降效果的导频信号电平调整。 为了最小化系统资源的负担,新的服务区域信号在最小时间过去之前是不可选择的,或者是从先前的导频信号中检测到能量的最小变化。 此外,使用先前服务区域的通信可以在新服务区域几乎立即被丢弃。
    • 6. 发明授权
    • Hash equation for MAC addresses that supports cache entry tagging and virtual address tables
    • 支持缓存条目标记和虚拟地址表的MAC地址的哈希方程式
    • US06230231B1
    • 2001-05-08
    • US09044490
    • 1998-03-19
    • Kenneth J. DeLongDavid S. Miller
    • Kenneth J. DeLongDavid S. Miller
    • G06F1200
    • H04L45/745H04L12/4641H04L69/22
    • A cache line index for an address cache entry is calculated by organizing an address such as a Media Access Control (“MAC”) address into a plurality of intermediate elements, barrel shifting the bits of at least one of the intermediate elements in accordance with predetermined criteria, and folding the intermediate address elements together with an exclusive-OR function. A Virtual Local Area Network (“VLAN”) index may also be included in cache line index calculation. The VLAN index enables segmentation of the cache into virtual tables. The tag portion of the cache entry includes a subset of the complete set of intermediate elements. The intermediate elements in the cache entry can be employed in conjunction with the cache line index to recover the original MAC address. Hence, the size of the tag portion of the address cache entry is reduced relative to the full MAC address without a reduction in the information content of the entry.
    • 通过将诸如媒体访问控制(“MAC”)地址的地址组织到多个中间元素中来计算用于地址高速缓存条目的高速缓存行索引,根据预定的桶来移位至少一个中间元素的比特 标准,并将中间地址元素与异或函数一起折叠。 虚拟局域网(“VLAN”)索引也可能包含在高速缓存行索引计算中。 VLAN索引可以将缓存分割成虚拟表。 高速缓存条目的标签部分包括完整的一组中间元素的子集。 高速缓存条目中的中间元素可以与高速缓存行索引一起使用以恢复原始MAC地址。 因此,地址高速缓存条目的标签部分的大小相对于完整MAC地址减小,而不会减少条目的信息内容。
    • 8. 发明授权
    • Satellite communication system constituted with primary and back-up multi-beam satellites
    • 卫星通信系统由主要和备用多波束卫星组成
    • US07379758B2
    • 2008-05-27
    • US10624257
    • 2003-07-21
    • Leonard N. SchiffDavid S. Miller
    • Leonard N. SchiffDavid S. Miller
    • H04M1/00H04B7/00H04Q7/00
    • H04B7/18519
    • A satellite communication system for providing communications between user terminals and gateways constituted with m primary satellites. In one embodiment, n back up satellites are also provided. Further, each satellite, primary or back-up, is equipped to project N/m beams onto and across an area in a loosely-packed array manner. M of the m primary and n back-up satellites collectively create N beam spots to cover the area. Moreover, each sub-area is covered by a beam spot separated from another sub-area covered by another beam spot by one beam width. Each satellite is also equipped to facilitate communication over 1 of m band of frequencies on one beam. As a result, any of the m primary satellites may be efficiently replaced on demand by a selected one of the n back-up satellites. The gateways and user terminals are configured to communicate signals through or with both or either the primary and back-up satellites.
    • 一种卫星通信系统,用于在由m个主卫星构成的用户终端和网关之间提供通信。 在一个实施例中,还提供n个备用卫星。 此外,每个卫星,主要或备用装备,以松散排列的方式将N / m波束投射到一个区域上并跨越一个区域。 m个主要和n个后备卫星的M共同创造N个光束点以覆盖该区域。 此外,每个子区域被从另一个光束点覆盖一个光束宽度的另一个子区域分离的光束点覆盖。 每个卫星还配备了一个波束上的m个频带范围内的通信。 结果,可以根据需要由n个备用卫星中的所选择的一个有效地替换任何一个m个主卫星。 网关和用户终端被配置为通过或与主卫星和后备卫星两者或任一者传送信号。