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Q有哪些加密方式？
A Encryption is not part of IEEE1588 and therefore, it does not directly related to our solution. However, it does need to be considered at the system level as what type of encryption (i.e. at which layer) and where the Timestamping is done (i.e. at which layer) will impact time sync accuracy.
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Q如何能确定链路时延对称？
AThis is a very critical question and it is also related to "Packet Delay Variation (PDV)" that will impact the accuracy. If the path asymmetry is fixed, then time difference can be calibrated out but if it's not, then there would be delay variation. Silabs' AccuTime Software is particulary good at dealign with PDV.
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Q这儿的高精度是何具体概念？如何界定？
A ns level is what we need for 5G, which is much higher than what 1588 used to be able to support.
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Q如果不用芯片，跑协议，可以达到什么等级的时间精度？
A 10/100us level.tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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QIEEE1588有独立的芯片方案么？
A A complete 1588 solution involves both software (i.e. PTP control loop) and hardware (i.e. PLL IC with DCO capability). Silabs has both. We also have a clock module family that can be a plug-and-play ready solution.
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Q在局域网同步会有什么不一样？
A Not sure what this question is trying ask..tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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Q时间同步的精度是如何控制的，最终达到稳定工作？
A The latest requirement for 5G application is ns level accuracy..tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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Q与时间同步可以多个应用一起同步么
A In theory, yes
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Q网络时间同步和gps授时哪个精度更高？
A Every equipment directly from GPS will be the most accurate synchronization but this is not realistic. As communicated, IEEE 1588 is designed to fill a niche not well served by either NTP (which is a few ms of Coordinated Universal Time (UTC)) and GPS. IEEE 1588 is designed for local systems requiring accuracies beyond those attainable using NTP. It is also designed for applications that cannot bear the cost of a GPS receiver at each node, or for which GPS signals are inaccessible..tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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QIEEE 1588传输数据的速度快吗
A No, not very high bandwidth at all. .tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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QPTP的工作流程是怎样的？
A Please see IEEE standard..tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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QIEEE 1588符合什么国际标准
A Please see IEEE standard..tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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Q高精度的时间同步在无人驾驶中应用在什么设计中？
A Mainly gateway switch..tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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Q这个解决方案是基于硬件还是软件层次？
A Both.tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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QSilicon Labs有提供时钟设计相关教程吗？
A近期我们举办了一个Clock Talk时钟在线系列研讨会，探讨许多时钟应用知识和开发技巧，欢迎您报名听讲或是收看随选即播的回放：https://cn.silabs.com/about-us/events/timing-webinar-series
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Q是否有Silicon Labs的IEEE 1588产品简介？
ASilicon Labs提供一系列的IEEE 1588 和同步以太网定时解决方案，包括模块和软件工具，您可以访问产品官网查阅相关信息和文档：https://cn.silabs.com/timing/network-synchronizers
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QSilicon Labs是否提供完整的时钟开发工具？
A是的，Silicon Labs提供一套完整的时钟开发软件ClockBuilder Pro，相当易于使用，有助您加速并简化时钟树的设计。您可以至官网了解更多相关信息：https://cn.silabs.com/developers/clockbuilder-pro-software
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Q从不同的卫星上取得的时间有什么不同？
A Should be the same.tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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Q如何进行时间校准呢？
A Very good question. This is the most important part of the solution. A complete 1588 solution involves both software (i.e. PTP control loop) and hardware (i.e. PLL IC with DCO capability). The "PTP control loop" will control the PLL IC to adjust the time counters to achieve sync.
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Q其时间是否需要进行加密出来来保护时间点？
A Encryption is not part of IEEE 1588..tb_button {padding:1px;cursor:pointer;border-right: 1px solid #8b8b8b;border-left: 1px solid #FFF;border-bottom: 1px solid #fff;}.tb_button.hover {borer:2px outset #def; background-color: #f8f8f8 !important;}.ws_toolbar {z-index:100000} .ws_toolbar .ws_tb_btn {cursor:pointer;border:1px solid #555;padding:3px} .tb_highlight{background-color:yellow} .tb_hide {visibility:hidden} .ws_toolbar img {padding:2px;margin:0px}
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