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1.发明授权Characterizing slave clock synchronization behavior by means of dropped sync packets 有权通过丢弃的同步数据包来表征从时钟同步行为公开(公告)号：US09560611B1
公开(公告)日：2017-01-31
申请号：US14989108
申请日：2016-01-06
CPC分类号： H04W56/00 , G06F1/12 , H04J3/0667 , H04J3/0673 , H04L7/00 , H04L7/0054 , H04L47/32
摘要： Methods, media, and systems are provided for characterizing the synchronization behavior of a slave clock. A sequence of sync packets, usable to synchronize with a grandmaster clock, is transmitted from the grandmaster clock to a slave clock. The sequence of sync packets is modified by dropping one or more sync packets from the sequence, providing a pattern of dropped sync packets. A synchronization output of the slave clock is monitored and, based on the synchronization output, a determination is made as to whether the slave clock is synchronized while the sequence of sync packets is modified. A characterization of the synchronization behavior of the slave clock is stored with respect to the pattern of dropped sync packets. The process may be repeated for various patterns of dropped sync packets.
摘要翻译： 提供了方法，媒体和系统来表征从时钟的同步行为。 可以将与mastermaster时钟同步的同步数据包序列从主机时钟发送到从时钟。 通过从序列中丢弃一个或多个同步分组来修改同步分组的顺序，提供丢弃的同步分组的模式。 监视从时钟的同步输出，并且基于同步输出，确定在同步分组的顺序被修改时从机时钟是否同步。 关于从时钟的同步行为的表征相对于丢弃的同步分组的模式被存储。 对于丢弃的同步分组的各种模式，可以重复该过程。
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公开(公告)号：US09137767B1
公开(公告)日：2015-09-15
申请号：US14018948
申请日：2013-09-05
CPC分类号： H04W40/02 , H04J3/0658 , H04L5/14 , H04L47/283 , H04W56/0015 , H04W84/045 , H04W88/16
摘要： The invention is directed to methods and systems for generating frequency reference signals from a radio signal received from a large-coverage access component, such as a base station. The radio signal is received and processed by an oscillator to filter out abnormalities. Consequently, a frequency reference signal is generated that is encapsulated into packets and delivered to one or more small-coverage access components using the Precision Timing Protocol or some other protocol that is useable by the small-coverage access components. The small-coverage access components comprise one or more of a femtocell or a picocell.
摘要翻译： 本发明涉及用于从诸如基站的大覆盖访问组件接收的无线电信号产生频率参考信号的方法和系统。 无线电信号由振荡器接收和处理以滤除异常。 因此，产生频率参考信号，该频率参考信号被封装成分组并且使用精确定时协议或可由小覆盖访问组件使用的一些其它协议传送到一个或多个小覆盖访问组件。 小覆盖访问组件包括毫微微小区或微微小区中的一个或多个。
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3.发明授权Delivering precision time protocol frequency and phase synchronization over a network without on-path support 有权通过网络提供精确的时间协议频率和相位同步，无需路径支持公开(公告)号：US08976750B1
公开(公告)日：2015-03-10
申请号：US13742873
申请日：2013-01-16
CPC分类号： H04W56/0065 , H04W56/001
摘要： Systems, methods, and computer-readable media for precision time protocol (PTP) frequency and phase synchronization to unanchored sites over non on-path supported networks are provided. In embodiments, the method includes continuously measuring one-way delay (OWD) and delay offset from a host site to an anchored site to determine a dynamic corrective offset (DCO). One of a plurality of unanchored sites is identified. In embodiments, the DCO is applied to PTP sync or PTP follow-up messages communicated from the host site to the identified unanchored site. The clocks associated with the unanchored sites are synchronized to the host clock.
摘要翻译： 提供了用于精确时间协议（PTP）的频率和相位同步到非路径支持网络上的非固定站点的系统，方法和计算机可读介质。 在实施例中，该方法包括连续测量从主机站点到锚定站点的单向延迟（OWD）和延迟偏移以确定动态校正偏移（DCO）。 识别多个未锚定位点之一。 在实施例中，将DCO应用于从主机站点传送到所识别的未锚定站点的PTP同步或PTP后续消息。 与未锚定站点相关联的时钟与主机时钟同步。
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公开(公告)号：US09591498B1
公开(公告)日：2017-03-07
申请号：US14572241
申请日：2014-12-16
CPC分类号： H04W24/08 , H04W56/0035
摘要： Methods and systems are provided for enabling a base station to listen and receive signals from neighboring base stations over a frequency designated for transmission to mobile devices for the detection of a synchronization failure. Embodiments provided herein enable the base station to cancel out its own transmission signal(s), which overloads the base station's own antenna 816 due to proximity. By cancelling out the base station's own signal, the base station listens and receives synchronization signals from one or more neighboring base stations over the frequency designated for transmission in a wireless communications network. A synchronization signal may be used, by the base station or as relayed to a server, to determine if the base station or the neighboring base station has experienced a synchronization failure.
摘要翻译： 提供了方法和系统，用于使得基站能够通过指定用于传输到移动设备的频率来监听和接收来自相邻基站的信号，以便检测同步故障。 本文提供的实施例使得基站能够抵消其自身的传输信号，其由于邻近而使基站自身的天线816过载。 通过取消基站自身的信号，基站通过指定用于在无线通信网络中传输的频率来收听来自一个或多个相邻基站的同步信号。 同步信号可以由基站使用或者被中继到服务器，以确定基站或相邻基站是否经历了同步故障。
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5.发明授权Characterizing slave clock synchronization behavior by means of dropped sync packets 有权通过丢弃的同步数据包来表征从时钟同步行为公开(公告)号：US09271247B1
公开(公告)日：2016-02-23
申请号：US14043643
申请日：2013-10-01
CPC分类号： H04W56/00 , G06F1/12 , H04J3/0667 , H04J3/0673 , H04L7/00 , H04L7/0054 , H04L47/32
摘要： Methods, media, and systems are provided for characterizing the synchronization behavior of a slave clock. A sequence of sync packets, usable to synchronize with a grandmaster clock, is transmitted from the grandmaster clock to a slave clock. The sequence of sync packets is modified by dropping one or more sync packets from the sequence, providing a pattern of dropped sync packets. A synchronization output of the slave clock is monitored and, based on the synchronization output, a determination is made as to whether the slave clock is synchronized while the sequence of sync packets is modified. A characterization of the synchronization behavior of the slave clock is stored with respect to the pattern of dropped sync packets. The process may be repeated for various patterns of dropped sync packets.
摘要翻译： 提供了方法，媒体和系统来表征从时钟的同步行为。 可以将与mastermaster时钟同步的同步数据包序列从主机时钟发送到从时钟。 通过从序列中丢弃一个或多个同步分组来修改同步分组的顺序，提供丢弃的同步分组的模式。 监视从时钟的同步输出，并且基于同步输出，确定在同步分组的顺序被修改时从机时钟是否同步。 关于从时钟的同步行为的表征相对于丢弃的同步分组的模式被存储。 对于丢弃的同步分组的各种模式，可以重复该过程。
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6.发明授权Method of adding and removing sites for a cluster based on a baseline delay comparison 有权基于基线延迟比较为群集添加和删除站点的方法公开(公告)号：US08982777B1
公开(公告)日：2015-03-17
申请号：US13919681
申请日：2013-06-17
CPC分类号： H04W16/18 , H04W24/02 , H04W56/001 , H04W56/0065
摘要： Systems, methods, and computer-readable media for adding and removing unanchored small cell sites for a cluster that delivers precision time protocol frequency and phase synchronization over a network without on-path support are provided. In embodiments, the method includes continuously measuring, in an asymmetric network without on-path support, an anchor path delay. A maximum standard allowable (MSA) delay variation is determined for the cluster. A respective round trip (RT) delay is continuously measured from the host site to each unanchored small cell site in the cluster. The anchor path delay is compared to each respective RT delay to determine a respective unanchored delay variation. In embodiments, unanchored small cell sites are be added to or removed from the cluster based on a comparison of a respective unanchored delay variation to the MSA delay variation.
摘要翻译： 提供了用于为集群添加和删除未锚定小型小区站点的系统，方法和计算机可读介质，通过网络提供精确的时间协议频率和相位同步，而无需路径支持。 在实施例中，该方法包括在非路径支持的不对称网络中连续地测量锚定路径延迟。 确定集群的最大标准允许（MSA）延迟变化。 从主机站点到集群中的每个未保存的小区域站点连续测量相应的往返（RT）延迟。 将锚定路径延迟与每个相应的RT延迟进行比较，以确定相应的未锚定延迟变化。 在实施例中，基于相应的未锚定延迟变化与MSA延迟变化的比较，将未锚定的小单元站点添加到簇或从群集中移除。
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公开(公告)号：US10194339B1
公开(公告)日：2019-01-29
申请号：US15402372
申请日：2017-01-10
摘要： Methods and systems are provided for enabling a base station to receive signals and synchronization information from neighboring base stations over a frequency band designated for transmissions to mobile devices. In embodiments, a cancellation signal is used to cancel antenna overload resulting from a base station's own transmission. By negating antenna overload, the base station may listen for synchronization signals output by neighboring base stations over the frequency band designated for transmission to mobile devices, such as a downlink band, for example. In embodiments, synchronization signals are used by the base station and/or a server to detect when synchronization failures occur at the base station and/or neighboring base stations. Synchronization signals from a neighboring base station may be used to re-synchronize a base station that have experience such a failure, in some embodiments.
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8.发明授权公开(公告)号：US09948452B1
公开(公告)日：2018-04-17
申请号：US14061335
申请日：2013-10-23
IPC分类号： H04L7/04
CPC分类号： H04J3/0661 , G01S1/00 , G01S1/245 , G01S19/42 , H04J3/0673 , H04W56/00
摘要： A method and system are provided for converting an enhanced Long Range Navigational (eLORAN) signal to a Precision Time Protocol (PTP) signal. Network devices can be located within buildings and not have access to a GPS signal directly from a GPS satellite. Network devices may also be located in a line of sight of a GPS satellite but may lose the GPS signal. An adapter is provided that takes an eLORAN signal, when a GPS signal is lost or not available, and converts the signal into a PTP and other signals to act as timing, synchronization, and syntonization inputs into the network devices. In some cases, the network devices can have a PTP client to receive the PTP signal, one pulse per second signal, and a ten (10) megahertz frequency signal. In other cases, the network devices do not have a PTP client, but can receive a time of day message, one pulse per second signal, and the 10 megahertz frequency signal.
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公开(公告)号：US09398514B1
公开(公告)日：2016-07-19
申请号：US14827062
申请日：2015-08-14
CPC分类号： H04W40/02 , H04J3/0658 , H04L5/14 , H04L47/283 , H04W56/0015 , H04W84/045 , H04W88/16
摘要： The invention is directed to methods and systems for generating frequency reference signals from a radio signal received from a large-coverage access component, such as a base station. The radio signal is received and processed by an oscillator to filter out abnormalities. Consequently, a frequency reference signal is generated that is encapsulated into packets and delivered to one or more small-coverage access components using the Precision Timing Protocol or some other protocol that is useable by the small-coverage access components. The small-coverage access components comprise one or more of a femtocell or a picocell.
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公开(公告)号：US09210582B1
公开(公告)日：2015-12-08
申请号：US14613495
申请日：2015-02-04
CPC分类号： H04W16/18 , H04W24/02 , H04W56/001 , H04W56/0065
摘要： Systems, methods, and computer-readable media for adding and removing unanchored small cell sites for a cluster that delivers precision time protocol frequency and phase synchronization over a network without on-path support are provided. In embodiments, the method includes continuously measuring, in an asymmetric network without on-path support, an anchor path delay. A maximum standard allowable (MSA) delay variation is determined for the cluster. A respective round trip (RT) delay is continuously measured from the host site to each unanchored small cell site in the cluster. The anchor path delay is compared to each respective RT delay to determine a respective unanchored delay variation. In embodiments, unanchored small cell sites are be added to or removed from the cluster based on a comparison of a respective unanchored delay variation to the MSA delay variation.
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