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    • 3. 发明授权
    • Software-hardware partitioning of a scheduled medium-access protocol
    • 计划的媒体访问协议的软硬件分区
    • US07525971B2
    • 2009-04-28
    • US11081932
    • 2005-03-16
    • Martin D. CarrollIlija HadzicDusan Suvakovic
    • Martin D. CarrollIlija HadzicDusan Suvakovic
    • H04L12/28H04J14/00
    • H04L12/66H04L47/24
    • A processing device, configured to implement at least a portion of a scheduled medium-access protocol (SMAP) in a communication system, comprises a processor, a memory coupled to the processor, and one or more additional hardware modules. The functionality of the portion of the SMAP implemented in the processing device is partitioned between software, stored in the memory and executable by the processor, and hardware comprising the one or more additional hardware modules. In an illustrative embodiment, the processing device comprises a head-end device of a passive optical network, and the functionality comprises at least a scheduler and a grant generator, with the scheduler being implemented in the software and the grant generator being implemented in the hardware.
    • 一种被配置为在通信系统中实现调度介质访问协议(SMAP)的至少一部分的处理设备,包括处理器,耦合到处理器的存储器以及一个或多个附加硬件模块。 在处理设备中实现的SMAP的部分的功能在存储在存储器中并且可由处理器执行的软件以及包括一个或多个附加硬件模块的硬件之间进行分区。 在说明性实施例中,处理设备包括无源光网络的头端设备,并且功能性至少包括调度器和授权生成器,其中调度器在软件中实现,并且授权生成器被实现在硬件中 。
    • 4. 发明申请
    • High-speed serial transceiver with sub-nominal rate operating mode
    • 具有次标称速率操作模式的高速串行收发器
    • US20060222129A1
    • 2006-10-05
    • US11093638
    • 2005-03-30
    • Ilija HadzicDusan Suvakovic
    • Ilija HadzicDusan Suvakovic
    • H04L7/00H04L7/02
    • H04L7/0338
    • A communication device comprises a receiver and a data recovery module. The receiver may be an element of a serial transceiver embedded in or otherwise associated with an FPGA or other type of reconfigurable hardware. The receiver is operable with an unlocked sampling clock. The data recovery module is configured to detect transition edges in data signal samples generated by the receiver using the unlocked sampling clock, and to determine from the detected edges a sampling point for use in recovery of the associated data. The data recovery module is further configured to provide adjustment in the sampling point in the presence of transition edge variations, such as one or more exception conditions, that are attributable to the unlocked sampling clock.
    • 通信设备包括接收机和数据恢复模块。 接收器可以是串行收发器的一个元件,嵌入在FPGA或其他类型的可重新配置硬件中或以其他方式与FPGA或其他类型的可重新配置的硬件相关联。 接收器可以用解锁的采样时钟操作。 数据恢复模块被配置为检测由接收机使用解锁的采样时钟产生的数据信号样本中的转换边缘,并且从检测到的边缘确定用于恢复关联数据的采样点。 数据恢复模块还被配置为在存在可归因于解锁的采样时钟的过渡边缘变化(例如一个或多个异常条件)的情况下,在采样点中提供调整。
    • 6. 发明申请
    • Software-hardware partitioning of a scheduled medium-access protocol
    • 计划的媒体访问协议的软硬件分区
    • US20060209825A1
    • 2006-09-21
    • US11081932
    • 2005-03-16
    • Martin CarrollIlija HadzicDusan Suvakovic
    • Martin CarrollIlija HadzicDusan Suvakovic
    • H04L12/56H04L12/28
    • H04L12/66H04L47/24
    • A processing device, configured to implement at least a portion of a scheduled medium-access protocol (SMAP) in a communication system, comprises a processor, a memory coupled to the processor, and one or more additional hardware modules. The functionality of the portion of the SMAP implemented in the processing device is partitioned between software, stored in the memory and executable by the processor, and hardware comprising the one or more additional hardware modules. In an illustrative embodiment, the processing device comprises a head-end device of a passive optical network, and the functionality comprises at least a scheduler and a grant generator, with the scheduler being implemented in the software and the grant generator being implemented in the hardware. As a result of this software-hardware partitioning, the scheduler is able to generate updated schedules at a rate which is independent of a rate at which the grant generator generates upstream channel access grants for subscriber devices of the system, thereby improving system performance.
    • 一种被配置为在通信系统中实现调度介质访问协议(SMAP)的至少一部分的处理设备,包括处理器,耦合到处理器的存储器以及一个或多个附加硬件模块。 在处理设备中实现的SMAP的部分的功能在存储在存储器中并且可由处理器执行的软件以及包括一个或多个附加硬件模块的硬件之间进行分区。 在说明性实施例中,处理设备包括无源光网络的头端设备,并且功能性至少包括调度器和授权生成器,其中调度器在软件中实现,并且授权生成器被实现在硬件中 。 作为这种软件 - 硬件分区的结果,调度器能够以不同于授权生成器为系统的订户设备生成上行信道访问许可的速率的速率生成更新的调度,从而提高系统性能。
    • 7. 发明授权
    • High-speed serial transceiver with sub-nominal rate operating mode
    • 具有次标称速率操作模式的高速串行收发器
    • US07672416B2
    • 2010-03-02
    • US11093638
    • 2005-03-30
    • Ilija HadzicDusan Suvakovic
    • Ilija HadzicDusan Suvakovic
    • H04L7/04H04L7/00
    • H04L7/0338
    • A communication device comprises a receiver and a data recovery module. The receiver may be an element of a serial transceiver embedded in or otherwise associated with an FPGA or other type of reconfigurable hardware. The receiver is operable with an unlocked sampling clock. The data recovery module is configured to detect transition edges in data signal samples generated by the receiver using the unlocked sampling clock, and to determine from the detected edges a sampling point for use in recovery of the associated data. The data recovery module is further configured to provide adjustment in the sampling point in the presence of transition edge variations, such as one or more exception conditions, that are attributable to the unlocked sampling clock.
    • 通信设备包括接收机和数据恢复模块。 接收器可以是串行收发器的一个元件,嵌入在FPGA或其他类型的可重新配置硬件中或以其他方式与FPGA或其他类型的可重新配置硬件相关联。 接收器可以用解锁的采样时钟操作。 数据恢复模块被配置为检测由接收机使用解锁的采样时钟产生的数据信号样本中的转换边缘,并且从检测到的边缘确定用于恢复关联数据的采样点。 数据恢复模块还被配置为在存在可归因于解锁的采样时钟的过渡边缘变化(例如一个或多个异常条件)的情况下,在采样点中提供调整。
    • 10. 发明申请
    • Method, Apparatus and System for Frequency Synchronization Between Devices Communicating over a Packet Network
    • 用于通过分组网络通信的设备之间的频率同步的方法,装置和系统
    • US20100158051A1
    • 2010-06-24
    • US12339318
    • 2008-12-19
    • Ilija HadzicDennis Raymond MorganAlf NeustadtZulfiquar Sayeed
    • Ilija HadzicDennis Raymond MorganAlf NeustadtZulfiquar Sayeed
    • H04J3/06H04L7/00
    • H03L7/085H03L7/087H04J3/0664H04J3/0667
    • An endpoint or other communication device of a communication system includes a clock recovery module. The communication device is operative as a slave device relative to another communication device that is operative as a master device. The clock recovery module comprises a clock recovery loop configured to control a slave clock frequency of the slave device so as to synchronize the slave clock frequency with a master clock frequency of the master device. The clock recovery loop utilizes a frequency error estimator implemented as a maximum-likelihood estimator with slope fitting based on a sequence of arrival timestamps, and a loop filter implemented as a series combination of an adaptive-bandwidth filter and a proportional-integral controller. The clock recovery module may further comprise a discontinuity detector configured to detect a discontinuity in delays of respective timing messages, and a loop controller operative to place the clock recovery loop in a particular state responsive to detection of the discontinuity.
    • 通信系统的端点或其他通信设备包括时钟恢复模块。 通信设备相对于作为主设备操作的另一通信设备而作为从设备操作。 时钟恢复模块包括时钟恢复环路,其被配置为控制从设备的从时钟频率,以使从时钟频率与主设备的主时钟频率同步。 时钟恢复环路利用被实现为基于到达时间序列的斜率拟合的最大似然估计器的频率误差估计器,以及实现为自适应带宽滤波器和比例积分控制器的串联组合的环路滤波器。 时钟恢复模块还可以包括不连续检测器,其被配置为检测相应定时消息的延迟的不连续性,以及循环控制器,用于响应于不连续性的检测将时钟恢复环置于特定状态。