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21. 发明授权

US08005065B2 Keep-alive for wireless networks 有权
标题翻译：保持无线网络
公开(公告)号：US08005065B2
公开(公告)日：2011-08-23
申请号：US11853668
申请日：2007-09-11
申请人： Zhanfeng Jia , David Jonathan Julian
发明人： Zhanfeng Jia , David Jonathan Julian
IPC分类号： H04J3/06
CPC分类号： H04L12/189 , H04L12/1863 , H04L67/14 , H04L67/145 , H04L67/325 , H04W52/0216 , H04W76/25 , Y02D70/142 , Y02D70/146 , Y02D70/26
摘要： A transmitting device transmits data to one or more receiving devices. At least one of the receiving devices transmits a keep-alive to the transmitting device. The keep-alive is transmitted at a reduced rate relative to the data transmission rate. In some implementations multiple receiving devices may transmit keep-alives. In these cases, each receiving device may transmit its keep-alives according to a schedule to prevent or reduce the likelihood of overlapping keep-alives. In some implementations a receiving device may be selected to transmit keep-alives. Here, if the selected receiving device stops transmitting keep-alives another receiving device is selected to transmit keep-alives. Through the use of the above techniques, the transmitting device need not keep track of which receiving devices are listening to the data transmission. Rather, the transmitting device may simply stop transmitting in the event that it no longer receives keep-alives.
摘要翻译：发送设备向一个或多个接收设备发送数据。至少一个接收设备向发送设备发送保持活动。保持活动以相对于数据传输速率的降低的速率传输。在一些实施方式中，多个接收设备可以传送保持活动。在这些情况下，每个接收设备可以根据时间表发送其保持活动，以防止或减少保留重叠的可能性。在一些实施方式中，可以选择接收设备来传送保持活动。这里，如果选择的接收设备停止发送保持活动，则选择另一个接收设备来传送保持密码。通过使用上述技术，传输设备不需要跟踪哪些接收设备正在监听数据传输。相反，发送设备可以在其不再接收保持活动的情况下简单地停止发送。

22. 发明授权

US07965805B2 Signal generator with signal tracking 有权
标题翻译：带信号跟踪的信号发生器
公开(公告)号：US07965805B2
公开(公告)日：2011-06-21
申请号：US11859354
申请日：2007-09-21
申请人： Chong U. Lee , David Jonathan Julian , Amal Ekbal , Pavel Monat , Wei Xiong
发明人： Chong U. Lee , David Jonathan Julian , Amal Ekbal , Pavel Monat , Wei Xiong
IPC分类号： H04L7/00
CPC分类号： H03L7/00 , H03K7/06 , H03L7/06
摘要： Frequency and phase of an output signal is adjusted to track an input signal. A control signal is adjusted to control a frequency of an oscillating signal from which the output signal is derived. In some aspects the frequency of the oscillating signal is adjusted by reconfiguration of reactive circuits coupled to an oscillator circuit. Phase of the output signal may be adjusted based on comparison of the oscillating signal with an adjustable threshold. For example, the adjustable threshold may comprise an adjustable bias signal for a transistor circuit whereby the oscillating signal is provided as an input to the transistor circuit and the output of the transistor circuit provides the output signal.
摘要翻译：调整输出信号的频率和相位以跟踪输入信号。调整控制信号以控制从其导出输出信号的振荡信号的频率。在一些方面，振荡信号的频率通过耦合到振荡器电路的无功电路的重新配置来调整。可以基于振荡信号与可调阈值的比较来调整输出信号的相位。例如，可调阈值可以包括用于晶体管电路的可调偏置信号，由此将振荡信号提供给晶体管电路的输入，并且晶体管电路的输出提供输出信号。

23. 发明申请

US20100165869A1 SYSTEM AND METHOD FOR ACKNOWLEDGEMENT PACKET TRANSMITTING AND RECEIVING 有权
标题翻译：用于确认分组传输和接收的系统和方法
公开(公告)号：US20100165869A1
公开(公告)日：2010-07-01
申请号：US12720415
申请日：2010-03-09
申请人： Zhanfeng Jia , Qingjiang Tian , David Jonathan Julian
发明人： Zhanfeng Jia , Qingjiang Tian , David Jonathan Julian
IPC分类号： H04L12/26
CPC分类号： H04L1/1607 , H04B2001/6908 , H04L1/1854
摘要： A communications method comprising the steps of receiving a data packet; processing the data packet; and transmitting an ack packet approximately at an end of a first defined time interval if the processing of the data packet is completed within the first defined interval, or transmitting the ack packet approximately at an end of a second defined time interval if the processing of the data packet is not completed within the first defined interval and is completed within the second defined interval. Another communication method comprising the steps of transmitting a data packet; scanning a channel for an ack packet approximately at an end of a first defined time interval from the transmission of the data packet; and scanning the channel for the ack packet approximately at an end of a second defined time interval from the transmission of the data packet if the ack packet was not received within the first defined interval.
摘要翻译：一种通信方法，包括以下步骤：接收数据分组; 处理数据包; 以及如果在所述第一定义的间隔内完成所述数据分组的处理，则在第一定义的时间间隔的结尾处大致发送ack分组，或者如果所述第一定义的时间间隔的处理数据分组在第一定义的间隔内未完成，并且在第二定义的间隔内完成。另一种通信方法包括以下步骤：发送数据分组; 从数据分组的发送开始，在第一定义的时间间隔结束时扫描一个用于确认分组的信道; 以及如果在所述第一定义的间隔内没有接收到所述确认分组，则在从所述数据分组的发送开始的第二定义的时间间隔的结束时，大致对所述确认分组的所述信道进行扫描。

24. 发明申请

US20100157886A1 PREAMBLE CAPTURE AND MEDIUM ACCESS CONTROL 有权
标题翻译：前置捕获和中等访问控制
公开(公告)号：US20100157886A1
公开(公告)日：2010-06-24
申请号：US12063655
申请日：2007-10-26
申请人： Zhanfeng Jia , David Jonathan Julian , Amal Ekbal
发明人： Zhanfeng Jia , David Jonathan Julian , Amal Ekbal
IPC分类号： H04W40/00 , H04L12/413
CPC分类号： H04B1/7183 , H04B1/7075
摘要： An apparatus and method for wireless communications configured to receive simultaneous transmissions from a plurality of wireless devices, with each of the transmissions having a reference signal, acquire the reference signals and, based on information obtained from the acquisition of the reference signals, select the transmission from one of the wireless devices for timing synchronization and decoding.
摘要翻译：一种用于无线通信的设备和方法，被配置为从多个无线设备接收同时传输，其中每个传输具有参考信号，获取参考信号，并且基于从获取参考信号获得的信息，选择传输从无线设备之一进行定时同步和解码。

25. 发明申请

US20090307766A1 METHOD AND APPARATUS FOR VERIFYING DATA PACKET INTEGRITY IN A STREAMING DATA CHANNEL 有权
标题翻译：用于在流数据通道中验证数据分组完整性的方法和装置
公开(公告)号：US20090307766A1
公开(公告)日：2009-12-10
申请号：US12135976
申请日：2008-06-09
申请人： Gregory Gordon Rose , David Jonathan Julian , Lu Xiao
发明人： Gregory Gordon Rose , David Jonathan Julian , Lu Xiao
IPC分类号： G06F21/00 , G06F15/16
CPC分类号： H04L63/123 , H04L1/02 , H04L1/20
摘要： Disclosed is a method for verifying data packet integrity in a streaming-data channel. In the method, data packets are received from the streaming-data channel. Each data packet includes a data payload and a corresponding message integrity code. The received data packets are processed in a first processing mode, wherein the received data packets are forwarded to an application module before checking the integrity of the data packets using the respective message integrity codes. An integrity-check-failure measurement is generated for monitoring an integrity-check-failure rate in the first processing mode. If the integrity-check-failure measurement exceeds an integrity-check threshold, then the method transitions to a second processing mode. A received data packet is forwarded to the application module in the second processing mode only after passing the integrity check.
摘要翻译：公开了一种用于验证流数据信道中的数据分组完整性的方法。在该方法中，从流数据信道接收数据分组。每个数据分组包括数据有效载荷和对应的消息完整性代码。接收到的数据分组以第一处理模式进行处理，其中在使用各自的消息完整性代码检查数据分组的完整性之前，所接收的数据分组被转发到应用模块。产生完整性检查失败测量，用于在第一处理模式中监视完整性检查失败率。如果完整性检查失败测量超过完整性检查阈值，则该方法转换到第二处理模式。只有在通过完整性检查之后，接收的数据包将以第二处理模式转发到应用模块。

26. 发明申请

US20090270030A1 MULTI-LEVEL DUTY CYCLING 失效
标题翻译：多层次循环
公开(公告)号：US20090270030A1
公开(公告)日：2009-10-29
申请号：US12118376
申请日：2008-05-09
申请人： Zhanfeng Jia , David Jonathan Julian , Chong U Lee
发明人： Zhanfeng Jia , David Jonathan Julian , Chong U Lee
IPC分类号： H04B7/24
CPC分类号： H04W52/04 , H04B1/1615 , H04W48/16 , H04W52/0274 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/23 , Y02D70/26 , Y02D70/40
摘要： A duty cycle scheme for wireless communication employs three or more duty cycle levels. In some aspects, a wireless device may continually scan for signals in an active state associated with a first duty cycle, periodically scan for signals during a periodic state associated with a second duty cycle, and periodically scan for signals during a standby state associated with a third duty cycle. Here, the second duty cycle may be lower than the first duty cycle and the third duty cycle may be lower than the second duty cycle. In some aspects the timing of different states may be correlated. In some aspects each wireless in a system may independently control its duty cycle states.
摘要翻译：无线通信的占空比方案采用三个或更多个占空比水平。在一些方面，无线设备可以连续地扫描与第一占空比关联的活动状态的信号，在与第二占空比相关联的周期性状态期间周期性地扫描信号，并且在与第一占空比相关联的待机状态期间周期性地扫描信号第三个工作周期。这里，第二占空比可以低于第一占空比，并且第三占空比可以低于第二占空比。在某些方面，不同状态的时序可能相关。在某些方面，系统中的每个无线系统可以独立地控制其占空比状态。

27. 发明申请

US20090259906A1 DATA SUBSTITUTION SCHEME FOR OVERSAMPLED DATA 有权
标题翻译：数据替代数据替代数据
公开(公告)号：US20090259906A1
公开(公告)日：2009-10-15
申请号：US12146324
申请日：2008-06-25
申请人： Harinath Garudadri , Somdeb Majumdar , David Jonathan Julian , Chinnapa K. Ganapathy
发明人： Harinath Garudadri , Somdeb Majumdar , David Jonathan Julian , Chinnapa K. Ganapathy
IPC分类号： G06F11/07
CPC分类号： H04L1/0045 , G10L19/005 , H04L1/0057
摘要： Low latency and computationally efficient techniques may be employed to account for errors in data such as low bit-width, oversampled data. In some aspects these techniques may be employed to mitigate audio artifacts associated with sigma-delta modulated audio data. In some aspects an error may be detected in a set of encoded data based on an outcome of a channel decoding process. Upon determining that a set of data may contain at least one error, the set of data may be replaced with another set of data that is based on one or more neighboring data sets. For example, in some aspects a set of data including at least one bit in error may be replaced with data that is generated by applying a cross-fading operation to neighboring data sets. In some aspects a given data bit may be flipped as a result of a linear prediction operation that is applied to PCM equivalent data that is associated with the given data bit and its neighboring data bits. In some aspects a set of data including at least one bit in error may be replaced with data that is generated by performing linear interpolation operations on PCM equivalent data that is associated with neighboring data sets.
摘要翻译：可以采用低延迟和计算有效的技术来解决数据中的错误，例如低位宽度，过采样数据。在一些方面，可以采用这些技术来减轻与Σ-Δ调制音频数据相关联的音频伪影。在一些方面，可以基于信道解码过程的结果在一组编码数据中检测到错误。在确定一组数据可能包含至少一个错误时，可以用基于一个或多个相邻数据集的另一组数据替换该数据集。例如，在一些方面，包括至少一个错误位的一组数据可以由通过对相邻数据集应用交叉衰落操作而产生的数据代替。在一些方面，作为施加到与给定数据位及其相邻数据位相关联的PCM等效数据的线性预测操作的结果，可以翻转给定数据位。在一些方面，包括至少一个错误位的一组数据可以由通过对与相邻数据集相关联的PCM等效数据执行线性内插操作而产生的数据代替。

28. 发明申请

US20090251208A1 LOW POWER SLICER-BASED DEMODULATOR FOR PPM 有权
标题翻译：用于PPM的低功率切片机解调器
公开(公告)号：US20090251208A1
公开(公告)日：2009-10-08
申请号：US12099686
申请日：2008-04-08
申请人： Chong U. Lee , Amal Ekbal , David Jonathan Julian , Jun Shi , Supisa Lerstaveesin
发明人： Chong U. Lee , Amal Ekbal , David Jonathan Julian , Jun Shi , Supisa Lerstaveesin
IPC分类号： H03K9/04 , H04R3/00
CPC分类号： H04L25/4902 , H04B1/71637 , H04B14/026
摘要： An apparatus and method for communications is disclosed. The apparatus includes a slicer configured to generate samples of a signal carrying information, and a demodulator having a digital integrator configured to integrate the samples, the demodulator being further configured to recover from the integrated samples data representative of the information carried by the signal.
摘要翻译：公开了一种用于通信的装置和方法。该装置包括：被配置为产生携带信息的信号的采样的限幅器，以及具有被配置为对采样进行积分的数字积分器的解调器，所述解调器还被配置为从所述积分样本中恢复表示由所述信号携带的信息的数据。

29. 发明授权

US07576672B2 Adaptive Dynamic Range Control 有权
标题翻译：自适应动态范围控制
公开(公告)号：US07576672B2
公开(公告)日：2009-08-18
申请号：US11843914
申请日：2007-08-23
申请人： Chong U Lee , David Jonathan Julian , Harinath Garudadri , Somdeb Majumdar
发明人： Chong U Lee , David Jonathan Julian , Harinath Garudadri , Somdeb Majumdar
IPC分类号： H03M3/02
CPC分类号： H03M3/49
摘要： Apparatus and method for processing signals. A sigma-delta modulator is used. An adaptive dynamic range controller is configured to adaptively adjust the dynamic range of a signal output from the sigma-delta modulator.
摘要翻译：信号处理装置及方法。使用Σ-Δ调制器。自适应动态范围控制器被配置为自适应地调整从Σ-Δ调制器输出的信号的动态范围。

30. 发明授权

US07536626B2 Power control using erasure techniques 有权
标题翻译：电源控制使用擦除技术
公开(公告)号：US07536626B2
公开(公告)日：2009-05-19
申请号：US11020708
申请日：2004-12-22
申请人： Arak Sutivong , Avneesh Agrawal , David Jonathan Julian
发明人： Arak Sutivong , Avneesh Agrawal , David Jonathan Julian
IPC分类号： H03M13/00
CPC分类号： H04L1/0045 , H04B17/309 , H04L1/0057 , H04L1/20 , H04W52/125 , H04W52/146 , H04W52/16 , H04W52/20 , H04W52/241 , H04W52/243 , H04W52/247 , H04W52/362 , H04W52/367 , H04W52/54
摘要： Techniques for performing erasure detection and power control for a transmission without error detection coding are described. For erasure detection, a transmitter transmits codewords via a wireless channel. A receiver computes a metric for each received codeword, compares the computed metric against an erasure threshold, and declares the received codeword to be “erased” or “non-erased”. The receiver dynamically adjusts the transmit power based on whether the codewords met the erasure threshold or not.
摘要翻译：描述了用于对没有错误检测编码的传输进行擦除检测和功率控制的技术。为了擦除检测，发射机经由无线信道发送码字。接收机计算每个接收到的码字的度量，将所计算的度量与擦除阈值进行比较，并将接收的码字声明为“擦除”或“未擦除”。接收机基于码字是否满足擦除阈值来动态调整发射功率。

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