{"id":17002,"date":"2025-12-08T15:56:53","date_gmt":"2025-12-08T07:56:53","guid":{"rendered":"https:\/\/bdtime.cn\/?p=17002"},"modified":"2026-03-19T17:03:20","modified_gmt":"2026-03-19T09:03:20","slug":"intelligent-transportation-solutions","status":"publish","type":"post","link":"https:\/\/bdpnt.com\/en\/intelligent-transportation-solutions\/","title":{"rendered":"Unified Time and Frequency Solutions for the Intelligent Transportation Industry"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"17002\" class=\"elementor elementor-17002\" data-elementor-post-type=\"post\">\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-73d9772 e-flex e-con-boxed e-con e-parent\" data-id=\"73d9772\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c56dd0a elementor-widget elementor-widget-woocommerce-breadcrumb\" data-id=\"c56dd0a\" data-element_type=\"widget\" data-widget_type=\"woocommerce-breadcrumb.default\">\n\t\t\t\t\t<nav class=\"woocommerce-breadcrumb\" aria-label=\"Breadcrumb\" data-no-translation=\"\" data-trp-gettext=\"\">Home<\/nav>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-3891e37 e-con-full e-flex e-con e-parent\" data-id=\"3891e37\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-a8dd848 e-flex e-con-boxed e-con e-child\" data-id=\"a8dd848\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4f8903b elementor-widget elementor-widget-theme-post-title elementor-page-title elementor-widget-heading\" data-id=\"4f8903b\" data-element_type=\"widget\" data-widget_type=\"theme-post-title.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Unified Time and Frequency Solutions for the Intelligent Transportation Industry<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-10f1cca elementor-widget elementor-widget-spacer\" data-id=\"10f1cca\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-fafd218 e-flex e-con-boxed e-con e-parent\" data-id=\"fafd218\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c5dbbd3 elementor-widget elementor-widget-spacer\" data-id=\"c5dbbd3\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37b0cb3 elementor-widget elementor-widget-heading\" data-id=\"37b0cb3\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Intelligent Transportation Unified Time and Frequency Solution<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d3b520c elementor-widget elementor-widget-text-editor\" data-id=\"d3b520c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Covering urban traffic control, intelligent high-speed, rail transportation, vehicle and road coordination of the whole area of the precise time system.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-416679b elementor-widget elementor-widget-spacer\" data-id=\"416679b\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-4fe7d37 e-flex e-con-boxed e-con e-parent\" data-id=\"4fe7d37\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-108d087 e-con-full e-flex e-con e-child\" data-id=\"108d087\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-889f14a elementor-widget elementor-widget-text-editor\" data-id=\"889f14a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>There exists a clear hierarchical need for time synchronization accuracy within the ITS, which can be classified by business characteristics:<\/p><ul><li><b><\/b><strong><b>Sub-microsecond and nanosecond:<\/b><\/strong>It is suitable for Vehicle-to-Guideway Collaboration (V2X), part of the rail signaling system, precise event correlation and high-precision positioning fusion.<\/li><li><b><\/b><strong><b>Sub-millisecond and microsecond:<\/b><\/strong>Suitable for urban signal control (green wave coordination, bus priority), electronic police\/cardinal multi-device forensics, gantry billing, roadway-level event detection, etc.<\/li><li><b><\/b><strong><b>Milliseconds:<\/b><\/strong>Suitable for video surveillance, information distribution, management platforms, office systems, etc.<\/li><\/ul><p>The above three types of demands coexist in the same city and the same road network, and it is not possible to cover all the scenarios with a single precision and a single protocol, so it is necessary to match them through a unified time base and a hierarchical access strategy.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-f5cef93 e-con-full e-flex e-con e-child\" data-id=\"f5cef93\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-64dadaf elementor-widget elementor-widget-image\" data-id=\"64dadaf\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"640\" height=\"358\" src=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/07\/06dd6beef2ae92ffe8fab487c67ca92b.jpeg\" class=\"attachment-large size-large wp-image-16992\" alt=\"\" srcset=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/07\/06dd6beef2ae92ffe8fab487c67ca92b.jpeg 640w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/07\/06dd6beef2ae92ffe8fab487c67ca92b-300x168.jpeg 300w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/07\/06dd6beef2ae92ffe8fab487c67ca92b-18x10.jpeg 18w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/07\/06dd6beef2ae92ffe8fab487c67ca92b-600x336.jpeg 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-c40282b e-flex e-con-boxed e-con e-parent\" data-id=\"c40282b\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-055863f elementor-widget elementor-widget-spacer\" data-id=\"055863f\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d99048a elementor-widget elementor-widget-heading\" data-id=\"d99048a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Typical problems of the current network<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-718b2b3 elementor-widget elementor-widget-text-editor\" data-id=\"718b2b3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The following problems are prevalent in the current network in city traffic control, smart highway and rail transit projects nationwide:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d974e78 elementor-widget elementor-widget-spacer\" data-id=\"d974e78\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-0e6c0df e-flex e-con-boxed e-con e-parent\" data-id=\"0e6c0df\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-b2095c1 e-con-full e-flex e-con e-child\" data-id=\"b2095c1\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-90d4a62 elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"90d4a62\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" class=\"icon\" viewbox=\"0 0 1024 1024\" width=\"200\" height=\"200\"><path d=\"M416.116778 121.565204 358.155952 66.84561 426.75564 0l220.289268 0L513.315556 121.565204 416.116778 121.565204zM496.194233 568.168615l64.977136-56.24488L617.759438 568.168615 582.410961 963.217398l-66.082967 60.782602L460.883889 963.217398 496.194233 568.168615zM533.563713 144.330081l132.280331-120.001787L628.360168 446.641543l-67.188799 65.320325-54.338274-65.320325L533.563713 144.330081z\" fill=\"#0042B2\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe2191a elementor-widget elementor-widget-heading\" data-id=\"fe2191a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Large intergenerational span of equipment<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-65dc745 elementor-widget elementor-widget-text-editor\" data-id=\"65dc745\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li>The core routers and some aggregation switches already support PTP;<\/li><li>Bulk stock access switches support only basic Layer 3 forwarding and do not support PTP hardware timestamping or BC\/TC functionality;<\/li><li>The protocols supported by the front-end devices are not standardized, some support PTP, some only support NTP or serial port timing.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-880516e e-con-full e-flex e-con e-child\" data-id=\"880516e\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dc36e39 elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"dc36e39\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" class=\"icon\" viewbox=\"0 0 1024 1024\" width=\"200\" height=\"200\"><path d=\"M309.935797 885.784114 177.499744 1004.040223l32.482861-365.364754c0.770649-9.209257 1.502766-18.457047 3.891778-26.125006 2.427545-7.667959 4.932154-13.794619 9.132192-18.457047 0 0 8.554205-7.667959 22.657085-21.501111l41.037066-39.881093 50.747245 53.714245L309.935797 885.784114zM656.650842 901.158564l56.064724 61.420736-66.776747 61.420736L194.569622 1024.000036l138.17739-122.841472L656.650842 901.158564zM690.636469 552.671026c-16.954281 16.877216-30.363576 21.501111-65.659306 21.501111L360.95277 574.172137 305.042175 514.292699l43.695806-44.504987c5.625739-6.126661 12.869841-10.750555 20.268072-13.833152 7.398232-3.044064 13.409295-4.585362 21.077254-4.585362l24.583707 0 265.604224 0 55.872062 59.91797L690.636469 552.671026zM382.877738 122.841472 326.967143 62.923502 392.048462 0l313.191808 0c30.671835 0 45.198572 7.667959 62.26845 27.627771l20.576332 24.583707-78.259419 70.629993L382.877738 122.841472zM725.431277 142.762752l79.762185-70.629993 27.242447 30.710368c3.352324 3.082597 7.089972 10.750555 11.097348 21.501111 1.926623 4.623895 2.35048 9.24779 2.735804 13.833152 0.539454 6.126661-0.038532 16.877216-0.385325 30.710368l-21.578176 227.187364c-2.19635 27.666304-7.359699 38.416859-27.126849 58.338139l-42.578365 39.919625-55.756465-58.338139L725.431277 142.762752z\" fill=\"#0042B2\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e59754c elementor-widget elementor-widget-heading\" data-id=\"e59754c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Mixed use of timing devices, non-harmonized protocol stacks<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b086925 elementor-widget elementor-widget-text-editor\" data-id=\"b086925\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li>Coexistence of multiple timing schemes within the same network<\/li><li>Time sources are not managed in a uniform manner, and there are deviations of seconds and even minutes between systems.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-92501bf e-con-full e-flex e-con e-child\" data-id=\"92501bf\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cfbf1cc elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"cfbf1cc\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" class=\"icon\" viewbox=\"0 0 1024 1024\" width=\"200\" height=\"200\"><path d=\"M606.286201 901.158566l63.000567 70.629993-32.636991 30.710368c-17.069878 15.297385-36.490237 21.501111-71.785967 21.501111L265.505153 1024.000039 209.594558 964.120601l77.373173-62.962034L606.286201 901.158566zM645.242515 451.330666l58.993191 59.91797L634.491959 574.133606 316.714788 574.133606l-60.804217-62.923502 71.51624-59.91797L645.242515 451.292134zM355.516972 122.841472l-57.413361-59.91797L366.267528 0l302.441253 0c13.833152 0 23.158007 1.502766 26.240603 1.502766 10.904685 1.541298 27.203914 12.291854 40.805872 27.704836l20.576332 24.545175-81.457614 69.088695L355.516972 122.841472zM652.987538 592.55212l69.589617-64.4648 27.011252 27.627772c15.297385 16.877216 20.961656 29.16907 22.464422 46.084818 0.693584 7.667959 1.348636 15.297385 0.462389 23.003877l-22.002033 239.517751c-2.19635 27.627772-8.7854 39.919625-30.093849 59.879438l-35.681055 30.710368-57.952815-66.044631L652.987538 592.55212zM693.215423 139.680156l80.031913-67.547397 20.306605 21.501111c11.983594 13.833152 19.304761 27.666304 20.653397 43.002222 0.539454 6.126661-0.038532 16.877216-1.541298 35.29573l-20.422202 222.602003c-2.04222 29.16907-7.244102 39.919625-24.198383 56.796841l-45.352702 42.963689-57.336296-58.33814L693.215423 139.680156z\" fill=\"#0042B2\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a25f036 elementor-widget elementor-widget-heading\" data-id=\"a25f036\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Lack of unified monitoring and operation and maintenance tools<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d28a17a elementor-widget elementor-widget-text-editor\" data-id=\"d28a17a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li>Lack of visual monitoring of the quality of the upper time sources (BeiDou, GPS, higher-level PTP);<\/li><li>Lack of centralized monitoring of deviation and jitter of downstream PTP\/NTP clients;<\/li><li>In the event of a green wave failure, forensic dispute, or billing complaint, it is difficult to quickly pinpoint whether time synchronization is the root cause.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-1576fe1 e-con-full e-flex e-con e-child\" data-id=\"1576fe1\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e73306a elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"e73306a\" data-element_type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" class=\"icon\" viewbox=\"0 0 1024 1024\" width=\"200\" height=\"200\"><path d=\"M323.635 438.182l-63.99 60.249-28.273-30.124c-14.854-15.044-23.85-31.637-25.173-46.68-0.53-5.972 0.038-16.555 0.227-31.636l30.2-326.756L303.376 0l53.71 63.235-33.451 374.947z m323.43 13.532l55.108 61.76-73.175 58.737h-248.44c-13.57 0-22.604 0-27.253-1.512-13.531 0-30.766-7.522-38.968-15.043l-38.176-40.632 68.262-63.273h302.642z m91.469 512.037L673.03 1024l-54.957-60.249 33.564-373.51 64.255-57.226 56.205 57.225-33.564 373.511z m45.886-525.569l-65.503 60.249-53.596-61.76 32.203-371.925L764.16 0l53.861 64.746-33.601 373.436z\" fill=\"#0042B2\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-322b516 elementor-widget elementor-widget-heading\" data-id=\"322b516\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Security Domain Segmentation and Time Basis Splitting<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-614ca9c elementor-widget elementor-widget-text-editor\" data-id=\"614ca9c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li>Physical or logical isolation exists for public security networks, specialized video networks, government networks, and specialized networks for vehicle and road collaboration;<\/li><li>Timing devices are often deployed independently within each security domain, resulting in inconsistent time baselines;<\/li><li>Lack of engineering means to achieve a uniform time reference in the context of \"disconnected network traffic\".<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-1d3dc84 e-flex e-con-boxed e-con e-parent\" data-id=\"1d3dc84\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b33a5da elementor-widget elementor-widget-spacer\" data-id=\"b33a5da\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fd2c454 elementor-widget elementor-widget-heading\" data-id=\"fd2c454\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Design Principles<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b131892 elementor-widget elementor-widget-text-editor\" data-id=\"b131892\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The overall design of the program is guided by the following three principles:<b><\/b><strong><b>Harmonization of benchmarks,<\/b><\/strong><b><\/b><strong><b>Tiered access,<\/b><\/strong><b><\/b><strong><b>smooth evolution<\/b><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9f945b6 elementor-widget elementor-widget-spacer\" data-id=\"9f945b6\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-555e7de e-flex e-con-boxed e-con e-parent\" data-id=\"555e7de\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-afe25b6 e-con-full e-flex e-con e-child\" data-id=\"afe25b6\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3a751d9 elementor-widget elementor-widget-heading\" data-id=\"3a751d9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">overall structure<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ef52de0 elementor-widget elementor-widget-text-editor\" data-id=\"ef52de0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><b><\/b><strong><b>core layer<\/b><\/strong><\/p><ul><li>Consisting of the T830 Clock Server, it provides intelligent selection of multiple reference sources, dual PTP\/NTP engines, and multiple interface outputs (PTP, NTP, 1PPS, 10 MHz, IRIG-B, etc.);<\/li><li>Provides multiple Ethernet network ports, all of which share the same operating system and the same security boundary, and can logically divide service network segments within the same security domain, providing a unified time base for different service VLANs\/subnets.<\/li><\/ul><p><strong style=\"font-size: 16px;\"><b>transport layer<\/b><\/strong><\/p><ul><li>Carrying PTP\/NTP grant traffic. available:<\/li><li>PTP trunks that support BC\/TC;<\/li><li>Unicast PTP based on 8275.2;<\/li><li>NTP on an existing Layer 3 network.<\/li><\/ul><p><b><\/b><strong><b>access layer<\/b><\/strong><\/p><ul><li>For specific business endpoints, including:<\/li><li>City signals, radar, RSUs, gantry controllers, track signaling equipment;<\/li><li>E-police, bayonet, video front-end, PIS, AFC, management platform, etc;<\/li><li>Select the PTP or NTP access method by service level.<\/li><\/ul><p><b><\/b><strong><b>Industry subsystems<\/b><\/strong><\/p><ul><li>City traffic management, intelligent high-speed, rail transportation, vehicle-road coordination, etc., are connected to the core layer through their respective professional networks or dedicated networks to share a unified time reference.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-1e5bbde e-con-full e-flex e-con e-child\" data-id=\"1e5bbde\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5e23ad0 elementor-widget elementor-widget-image\" data-id=\"5e23ad0\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"992\" src=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247121-1024x992.png\" class=\"attachment-large size-large wp-image-17049\" alt=\"\" srcset=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247121-1024x992.png 1024w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247121-300x291.png 300w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247121-768x744.png 768w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247121-12x12.png 12w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247121-600x581.png 600w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247121.png 1268w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-106918f e-flex e-con-boxed e-con e-parent\" data-id=\"106918f\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-47055f6 elementor-widget elementor-widget-spacer\" data-id=\"47055f6\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7cd3949 elementor-widget elementor-widget-heading\" data-id=\"7cd3949\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">system architecture<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bb47099 elementor-widget elementor-widget-spacer\" data-id=\"bb47099\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-f4a2ddc e-flex e-con-boxed e-con e-parent\" data-id=\"f4a2ddc\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e8b6e3c e-n-tabs-mobile elementor-widget elementor-widget-n-tabs\" data-id=\"e8b6e3c\" data-element_type=\"widget\" data-settings=\"{&quot;horizontal_scroll&quot;:&quot;disable&quot;}\" data-widget_type=\"nested-tabs.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-tabs\" data-widget-number=\"244018748\" aria-label=\"tab. Use Enter or Space to open the project, ESC to close and the arrow keys to navigate.\">\n\t\t\t<div class=\"e-n-tabs-heading\" role=\"tablist\">\n\t\t\t\t\t<button id=\"e-n-tab-title-2440187481\" class=\"e-n-tab-title\" aria-selected=\"true\" data-tab-index=\"1\" role=\"tab\" tabindex=\"0\" aria-controls=\"e-n-tab-content-2440187481\" style=\"--n-tabs-title-order: 1;\">\n\t\t\t\t\t\t<span class=\"e-n-tab-title-text\">\n\t\t\t\tCore layer (T830)\t\t\t<\/span>\n\t\t<\/button>\n\t\t\t\t<button id=\"e-n-tab-title-2440187482\" class=\"e-n-tab-title\" aria-selected=\"false\" data-tab-index=\"2\" role=\"tab\" tabindex=\"-1\" aria-controls=\"e-n-tab-content-2440187482\" style=\"--n-tabs-title-order: 2;\">\n\t\t\t\t\t\t<span class=\"e-n-tab-title-text\">\n\t\t\t\ttransport layer\t\t\t<\/span>\n\t\t<\/button>\n\t\t\t\t<button id=\"e-n-tab-title-2440187483\" class=\"e-n-tab-title\" aria-selected=\"false\" data-tab-index=\"3\" role=\"tab\" tabindex=\"-1\" aria-controls=\"e-n-tab-content-2440187483\" style=\"--n-tabs-title-order: 3;\">\n\t\t\t\t\t\t<span class=\"e-n-tab-title-text\">\n\t\t\t\taccess layer\t\t\t<\/span>\n\t\t<\/button>\n\t\t\t\t\t<\/div>\n\t\t\t<div class=\"e-n-tabs-content\">\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" id=\"e-n-tab-content-2440187481\" role=\"tabpanel\" aria-labelledby=\"e-n-tab-title-2440187481\" data-tab-index=\"1\" style=\"--n-tabs-title-order: 1;\" class=\"e-active elementor-element elementor-element-98f2512 e-con-full e-flex e-con e-child\" data-id=\"98f2512\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-007fac9 elementor-widget elementor-widget-text-editor\" data-id=\"007fac9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The core layer is centered on the T830 high-performance clock server, which provides a unified time reference and multi-protocol output capability, and the main functions include:<\/p><h5><strong>1\u3001Multi-reference source and intelligent source selection<\/strong><\/h5><p>Supports a variety of upstream reference sources: BeiDou timing signals; other GNSS such as GPS; upper-level PTP (PTP benchmark provided by the group or elsewhere); wired reference sources such as terrestrial 1PPS\/10 MHz.<\/p><h5><strong>2\u3001PTP\/NTP dual-engine architecture<\/strong><\/h5><ul><li><b><\/b><strong><b>PTP Engine<\/b><\/strong><ul><li>Implement IEEE 1588v2 PTP Grandmaster\/BC functionality based on hardware timestamps;<\/li><li>Supports multi-Domain, multi-Profile (e.g., G.8275.1, G.8275.2), and can provide independent PTP time domains for different business domains;<\/li><li>Supports configurable parameters for message rate, delay mechanism, and priority.<\/li><\/ul><\/li><li><b><\/b><strong><b>NTP Engine<\/b><\/strong><ul><li>Built-in high concurrency NTP server, support large-scale terminal concurrent timing;<\/li><li>Supports control of access sources (ACLs) in conjunction with network-side security policies.<\/li><\/ul><\/li><\/ul><p>Both engines share the same atomic clock as the local clock source, and share the same set of multi-reference source intelligent source selection algorithm to ensure that PTP and NTP outputs are in the same time base.<\/p><h5><strong>3\u3001Multi-network port output<\/strong><\/h5><p>The T830 provides multiple Ethernet ports for logical partitioning of business network segments on the same device:<\/p><ul><li><b><\/b><strong><b>Port Independent Configuration<\/b><\/strong><ul><li>Each physical network port can be configured independently: IP address and subnet, access control policy; PTP function switch, Profile type, message rate;<\/li><li>The network parameters for different ports are independent of each other.<\/li><\/ul><\/li><li><b><\/b><strong><b>network layer isolation<\/b><\/strong><ul><li>All physical network ports share the same operating system and the same security perimeter;<\/li><li>Each network port is used at the network level only as a timing service outlet;<\/li><\/ul><\/li><\/ul><ul><li><b><\/b><strong><b>Harmonization of time frames<\/b><\/strong><ul><li>The PTP\/NTP protocol stack for all ports shares the same atomic clock and multiple reference source algorithm internally;<\/li><li>Provides a unified time base for multiple business network segments, subject to logical partitioning.<\/li><\/ul><\/li><li><b><\/b><strong><b>Security Domain Usage Boundary Statement<\/b><\/strong><ul><li>A multi-port design is not the same as physically isolating the device across security domains;<\/li><\/ul><\/li><\/ul><p>For different security domains that require physical isolation in the security specification (e.g. public security private network and external network), T830 should be deployed or other isolation means should be used in each security domain separately, and timing should not be provided by a single T830 across domains at the same time.<\/p><p><a href=\"https:\/\/bdtime.cn\/wp-content\/uploads\/2025\/12\/\u56fe\u7247122.png\"><img decoding=\"async\" class=\"wp-image-17060 size-large aligncenter\" src=\"https:\/\/bdtime.cn\/wp-content\/uploads\/2025\/12\/\u56fe\u7247122-1024x495.png\" alt=\"\" width=\"1024\" height=\"495\" srcset=\"https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247122-1024x495.png 1024w, https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247122-300x145.png 300w, https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247122-768x371.png 768w, https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247122-18x9.png 18w, https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247122-600x290.png 600w, https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247122.png 1083w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/p><h5><strong>4. Timekeeping capability and output interface<\/strong><\/h5><p>Punctuality:<\/p><ul><li>An optional thermostatic crystal or rubidium clock provides hourly to daily timekeeping accuracy in the event of an upstream reference source failure;<\/li><li>The output side uses step-limiting and gradual convergence strategies to avoid the impact of time jumps on the business system.<\/li><\/ul><p>Output Interface:<\/p><ul><li>IP protocol output: PTP, NTP;<\/li><li>Physical signal output: 1 PPS, 10 MHz, IRIG-B (code type optional);<\/li><\/ul><p>Meet the needs of multi-disciplinary system access such as signaling, electric power, and weak power.<\/p><p>\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" id=\"e-n-tab-content-2440187482\" role=\"tabpanel\" aria-labelledby=\"e-n-tab-title-2440187482\" data-tab-index=\"2\" style=\"--n-tabs-title-order: 2;\" class=\"elementor-element elementor-element-5b0edb2 e-con-full e-flex e-con e-child\" data-id=\"5b0edb2\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9cab9d3 elementor-widget elementor-widget-text-editor\" data-id=\"9cab9d3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The transport layer is responsible for carrying timing protocol traffic within the same security domain or route-accessible network and is designed in a patterned manner:<\/p><h5><strong><b>1. Mode A: PTP BC\/TC Trunk (Multicast)<\/b><\/strong><\/h5><ul><li style=\"list-style-type: none;\"><ul><li>Condition: PTP BC\/TC and SyncE are universally supported on core, aggregation, and access switches;<\/li><li>Network topology: core T830 as GM, extend PTP domain downstream through multi-level BC\/TC;<\/li><li>Applicable Scenarios:<ul><li>New demonstration areas;<\/li><li>Orbital signaling network;<\/li><li>Specialized networks that require sub-microsecond to nanosecond accuracy, such as the Vehicle-Road Collaboration Specialized Network (VRSN).<\/li><\/ul><\/li><\/ul><\/li><\/ul><h5><strong>2. Mode B: Unicast PTP (G.8275.2)<\/strong><\/h5><ul><li>Condition: The intermediate transport network supports only normal Layer 3 forwarding and does not have PTP BC\/TC functionality;<\/li><li>Network topology: the T830 or PTP border clock establishes a one-to-one PTP session with the terminal or edge miniclock via G.8275.2. the intermediary device does IP forwarding only;<\/li><li>Applicable scenarios: urban traffic management inventory network, aggregation\/access does not uniformly support PTP; high-speed road sections across the carrier's private line or multi-level three-tier network key links; target accuracy of microseconds to sub-microseconds scenarios.<\/li><li style=\"list-style-type: none;\"><ul><li style=\"list-style-type: none;\"><ul><li style=\"list-style-type: none;\"><ul><li style=\"list-style-type: none;\">\u00a0<\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><h5><b><\/b><strong><b>Mode C: Pure NTP mode<\/b><\/strong><\/h5><ul><li>Condition: The network is only capable of providing basic IP connectivity and is not suitable for introducing PTP;<\/li><li>Network Topology: The T830 acts as an upstream NTP server, directly timing endpoints or subordinate NTP servers;<\/li><li>Applicable scenarios: video surveillance, management platform, office system; edge sites, independent intersections, small toll stations and other areas with restricted network conditions;<\/li><li>Requires millisecond to sub-millisecond time accuracy.<\/li><\/ul><p>The three modes can exist in parallel in the same city or within the same road network, with combinations chosen according to network conditions and service levels.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" id=\"e-n-tab-content-2440187483\" role=\"tabpanel\" aria-labelledby=\"e-n-tab-title-2440187483\" data-tab-index=\"3\" style=\"--n-tabs-title-order: 3;\" class=\"elementor-element elementor-element-66775d5 e-flex e-con-boxed e-con e-child\" data-id=\"66775d5\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b3c7e97 elementor-widget elementor-widget-text-editor\" data-id=\"b3c7e97\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Access level to all types of business terminals, access mode design by accuracy level and protocol capability:<b><\/b><\/p><h5><strong><b>1. PTP access terminal<\/b><\/strong><\/h5><p>Including: signaling machine, RSU, track signaling equipment, some gantry controllers, high-precision radar and so on;<\/p><p>Access method: In Mode A network, as a PTP client to access the access switch that supports PTP; in Mode B network, to establish a session directly with T830 or border clock via Unicast PTP.<\/p><h5><b><\/b><strong><b>2. Hybrid PTP\/NTP terminals<\/b><\/strong><\/h5><p>Including: multifunctional electronic police host, the core equipment of the bayonet system and so on;<\/p><p>Access method: The core equipment adopts PTP access; the peripheral equipment adopts NTP access, pointing to the T830 timeline in a unified way.<\/p><h5><b><\/b><strong><b>NTP Access Terminal<\/b><\/strong><\/h5><p>Including: cameras, PIS, AFC, management platform, office terminals, etc;<\/p><p>Access method: Access to the local T830 or subordinate NTP servers through NTP clients.<\/p><p>The access layer is configured on the principle of:<strong><b>Critical control devices prioritize PTP, logging and presentation devices prioritize NTP, and all endpoints uniformly point to a few T830 nodes or their subordinate servers as the upstream clock source.<\/b><\/strong>The<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-67cd9a1 elementor-hidden-desktop elementor-hidden-tablet elementor-widget elementor-widget-spacer\" data-id=\"67cd9a1\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-9683ebe e-flex e-con-boxed e-con e-parent\" data-id=\"9683ebe\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f02869c elementor-widget elementor-widget-spacer\" data-id=\"f02869c\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ac30b71 elementor-widget elementor-widget-heading\" data-id=\"ac30b71\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Urban road traffic topology<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8eefa6a elementor-widget elementor-widget-text-editor\" data-id=\"8eefa6a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>In this topology, PTP Unicast is used for direct front-end access for signaling and control services (Tier 1), and NTP converged access is used for electric police\/video services (Tier 2\/3).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-2d6394d e-flex e-con-boxed e-con e-parent\" data-id=\"2d6394d\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-44c1e8b e-con-full e-flex e-con e-child\" data-id=\"44c1e8b\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-264177a elementor-widget elementor-widget-text-editor\" data-id=\"264177a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The urban traffic management scenario can be abstracted into four layers by network topology:<\/p><ol><li><b><\/b><strong><b>Center room level<\/b><\/strong>: Traffic police detachment command center room, deployment of T830, access to the core switch.<\/li><li><b><\/b><strong><b>Regional Convergence Layer<\/b><\/strong>: Branch office or regional subcenter aggregation switches, most of which are Layer 3 forwarding devices only, with some newer devices supporting PTP.<\/li><li><b><\/b><strong><b>access layer<\/b><\/strong>: A large number of access switches in roadway\/intersection cabinets are stock devices that do not support PTP.<\/li><li><b><\/b><strong><b>terminal layer<\/b><\/strong>: Signalizers, radar, electronic police front-end, chokepoint front-end, cameras, intelligence boards, etc.<\/li><\/ol><p>\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-c3e8843 e-con-full e-flex e-con e-child\" data-id=\"c3e8843\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-db3ec40 elementor-widget elementor-widget-image\" data-id=\"db3ec40\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"632\" src=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247123-1024x632.png\" class=\"attachment-large size-large wp-image-17074\" alt=\"\" srcset=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247123-1024x632.png 1024w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247123-300x185.png 300w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247123-768x474.png 768w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247123-18x12.png 18w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247123-600x370.png 600w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247123.png 1268w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-694b076 e-flex e-con-boxed e-con e-parent\" data-id=\"694b076\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9da50d8 elementor-widget elementor-widget-spacer\" data-id=\"9da50d8\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5994ca4 elementor-widget elementor-widget-heading\" data-id=\"5994ca4\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Intelligent high-speed three-level cascade architecture<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-971cdbb elementor-widget elementor-widget-text-editor\" data-id=\"971cdbb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>According to the operation and maintenance management and network layout, intelligent high-speed mostly adopts the three-level topology of \"provincial center - road section center - toll station\/gateway frame\". The timing system follows this topology for cascading:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-2034d16 e-flex e-con-boxed e-con e-parent\" data-id=\"2034d16\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-d757725 e-con-full e-flex e-con e-child\" data-id=\"d757725\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-901e940 elementor-widget elementor-widget-image\" data-id=\"901e940\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"793\" src=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247124-1024x793.png\" class=\"attachment-large size-large wp-image-17075\" alt=\"\" srcset=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247124-1024x793.png 1024w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247124-300x232.png 300w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247124-768x595.png 768w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247124-15x12.png 15w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247124-600x465.png 600w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247124.png 1268w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-708db0a e-con-full e-flex e-con e-child\" data-id=\"708db0a\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ba4b903 elementor-widget elementor-widget-text-editor\" data-id=\"ba4b903\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h5><b><\/b><strong>1. Provincial center level<\/strong><\/h5><ul><li>Deploy provincial center T830 in provincial high-speed group data centers:<\/li><li>Upstream access to BeiDou\/GPS, superior PTP or 1PPS\/10 MHz;<\/li><li>The downstream provides PTP\/NTP to the segment centers through the group IP private network or transport network.<\/li><\/ul><h5><b><\/b><strong><b>2. Road section center level<\/b><\/strong><\/h5><ul><li>One T830 is deployed in each road management center:<\/li><li>The uplink acts as a PTP client or NTP client, clocked to the Provincial Center T830;<\/li><li>The downlink serves as the master clock for this section and provides PTP\/NTP for the toll booths and gantries.<b><\/b><\/li><\/ul><h5><strong><b>3. Site Level (Toll Plaza \/ Gantry \/ Service Area \/ Tunnel Entrance Machine Room)<\/b><\/strong><\/h5><ul><li>Toll station machine rooms are interconnected to the roadway center network via dedicated lines or fiber optics;<\/li><li>The gantry controllers, lane controllers and station video\/management system are connected to the toll station computer room through a local switch;<\/li><li>The tunnel portal cabinets are connected to the nearest toll station machine room via fiber optics.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-853359c e-flex e-con-boxed e-con e-parent\" data-id=\"853359c\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6242cfe elementor-widget elementor-widget-spacer\" data-id=\"6242cfe\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a81a91 elementor-widget elementor-widget-heading\" data-id=\"6a81a91\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Intelligent high-speed three-level cascade architecture<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b781435 elementor-widget elementor-widget-text-editor\" data-id=\"b781435\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>According to the operation and maintenance management and network layout, intelligent high-speed mostly adopts the three-level topology of \"provincial center - road section center - toll station\/gateway frame\". The timing system follows this topology for cascading:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-ea45fe5 e-flex e-con-boxed e-con e-parent\" data-id=\"ea45fe5\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-1846976 e-con-full e-flex e-con e-child\" data-id=\"1846976\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0b86338 elementor-widget elementor-widget-heading\" data-id=\"0b86338\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Railway Clock System Architecture<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c9cb24f elementor-widget elementor-widget-text-editor\" data-id=\"c9cb24f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>In existing lines or expansion and reconstruction scenarios, there are traditional stand-alone mother clock systems:<\/p><ul><li>The evolution of the T830 as a first class master clock replacing a conventional master clock can be realized in the following ways:<ol><li>Initial stage: Keep the original primary mother clock running, T830 provides upstream clock for it in the form of IRIG-B or 1PPS to realize the smooth replacement of \"mother clock to mother clock\";<\/li><li>Transitional phase: new stations or new line sections directly use T830 as the primary master clock, old lines retain the original secondary master clock, unified timing from T830;<\/li><li>Completion phase: Full switchover to the T830 system and decommissioning of the legacy master clock system.<\/li><\/ol><\/li><\/ul><p>Maintain the topology of \"unified primary mother clock, station secondary mother clock distribution\" during the whole life cycle, without changing the original safety classification and interface mode of rail transportation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-8142f7e e-con-full e-flex e-con e-child\" data-id=\"8142f7e\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7c67e6d elementor-widget elementor-widget-image\" data-id=\"7c67e6d\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"494\" src=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-1024x494.png\" class=\"attachment-large size-large wp-image-17080\" alt=\"\" srcset=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-1024x494.png 1024w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-300x145.png 300w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-768x371.png 768w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-18x9.png 18w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-600x290.png 600w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125.png 1268w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-ab9e9e7 e-con-full elementor-hidden-mobile e-flex e-con e-child\" data-id=\"ab9e9e7\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f82dd83 elementor-widget elementor-widget-image\" data-id=\"f82dd83\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"494\" src=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-1024x494.png\" class=\"attachment-large size-large wp-image-17080\" alt=\"\" srcset=\"https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-1024x494.png 1024w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-300x145.png 300w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-768x371.png 768w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-18x9.png 18w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125-600x290.png 600w, https:\/\/www.bdpnt.com\/wp-content\/uploads\/2025\/12\/\u56fe\u7247125.png 1268w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-84f0bed e-con-full e-flex e-con e-child\" data-id=\"84f0bed\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-084f7ee elementor-widget elementor-widget-heading\" data-id=\"084f7ee\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Vehicle-Road Collaboration Clock System<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dcf2b84 elementor-widget elementor-widget-text-editor\" data-id=\"dcf2b84\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The vehicle-road collaboration system consists of a demonstration area control center, roadside unit (RSU), MEC, sensors, and vehicle terminals with the following time-domain topology:<\/p><ul><li>The T830 is deployed in the control center room as the clock source for the VRS service network;<\/li><li>T830 is connected to the dedicated network for vehicle-road cooperation through an independent service network port, which does not do L2\/L3 forwarding with other service network ports in the device, forming a logical partition at the network layer;<\/li><li>Control center switches, aggregation switches, and roadside access switches build PTP capable networks;<\/li><li>RSUs, MECs and some high-precision sensors join the time domain as PTP clients.<\/li><\/ul><p>T830 multi-port capability is used to distinguish different service network segments, and all network ports share the same operating system and security boundary. Involving different security domains (e.g., Vehicle-Road Cooperative Specialized Network and other business networks), isolation is the responsibility of the upper-layer network and security equipment, and this device does not undertake physical isolation functions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-68d4c3b e-flex e-con-boxed e-con e-parent\" data-id=\"68d4c3b\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1badeff elementor-widget elementor-widget-spacer\" data-id=\"1badeff\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-be0eac1 elementor-widget elementor-widget-heading\" data-id=\"be0eac1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"> Configuration checklist<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af2cb43 elementor-widget elementor-widget-spacer\" data-id=\"af2cb43\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-fb4310f e-flex e-con-boxed e-con e-parent\" data-id=\"fb4310f\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-32f9399 eael-table-align-center eael-dt-th-align-left elementor-widget elementor-widget-eael-data-table\" data-id=\"32f9399\" data-element_type=\"widget\" data-widget_type=\"eael-data-table.default\">\n\t\t\t\t\t\t\t<div class=\"eael-data-table-wrap\" data-table_id=\"32f9399\" id=\"eael-data-table-wrapper-32f9399\" data-custom_responsive=\"false\">\n\t\t\t<table class=\"tablesorter eael-data-table center\" id=\"eael-data-table-32f9399\">\n\t\t\t    <thead>\n\t\t\t        <tr class=\"table-header\">\n\t\t\t\t\t\t\t\t\t            <th class=\"sorting\" id=\"\" colspan=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"data-table-header-text\">Configuration level<\/span><\/th>\n\t\t\t        \t\t\t\t            <th class=\"sorting\" id=\"\" colspan=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"data-table-header-text\">Typical Application Scenarios<\/span><\/th>\n\t\t\t        \t\t\t\t            <th class=\"sorting\" id=\"\" colspan=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"data-table-header-text\">T830 Configuration (dual or not, crystal type)<\/span><\/th>\n\t\t\t        \t\t\t\t            <th class=\"sorting\" id=\"\" colspan=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"data-table-header-text\">Switch\/PTP requirements<\/span><\/th>\n\t\t\t        \t\t\t\t            <th class=\"sorting\" id=\"\" colspan=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"data-table-header-text\">Typical Timing Patterns<\/span><\/th>\n\t\t\t        \t\t\t\t            <th class=\"sorting\" id=\"\" colspan=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"data-table-header-text\">Typical end-to-end timing accuracy<\/span><\/th>\n\t\t\t        \t\t\t\t        <\/tr>\n\t\t\t    <\/thead>\n\t\t\t  \t<tbody>\n\t\t\t\t\t\t\t\t\t\t\t<tr>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tflagship\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tProvincial centers, high-speed group centers, municipal traffic police centers, rail OCC, vehicle-road cooperation demonstration area control centers\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tMulti-computer deployment (master\/standby or dual master), atomic or rubidium clock timing, logical partitioning of multi-service ports (signal\/video\/management segments within the same security perimeter)\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tCore\/aggregation\/critical access switches support PTP BC\/TC and SyncE; full PTP network is used for traffic coordination, signaling system\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tPTP (Multicast\/BC) primary, Unicast supplemental, NTP and IRIG-B\/1PPS parallel outputs\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tMicrosecond: 1-5 \u03bcs (vehicle-road coordination, track signaling); millisecond: 1-5 ms (signal control, gantry); NTP terminal 10-50 ms\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t        \t\t\t\t\t\t<tr>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tmain stream (of a river)\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tDistrict and county traffic control sub-centers, road section management centers, large toll station centers, and general urban model road sections\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tSingle T830, rubidium clock or high stability crystal timekeeping, logical partitioning of multi-service ports (segments such as front-end\/platform within the same security perimeter)\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tCore\/partial aggregation switches support PTP BC\/TC; access layer can be ordinary Layer 3 switches; key nodes can be directly connected with Unicast PTP\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tCore Layer PTP (Multicast\/BC) + Access Layer Unicast PTP + NTP Hybrid\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tKey PTP terminals 10 \u03bcs to 1 ms; Unicast PTP terminals 1-5 ms; NTP terminals 10-50 ms\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t        \t\t\t\t\t\t<tr>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\teconomics\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tEdge toll booths, small intersection stand-alone cabinets, remote service areas, localized old areas\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tSingle T830, normal temperature-compensated crystal timing, single or small number of network ports (no segment partitioning required)\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tExisting switches need to support only basic IP forwarding, no PTP requirements\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tPure NTP timing (with a small number of 1PPS\/IRIG-B outputs)\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t   \t\t\t\t\t\t\t\t\t\t\t<td colspan=\"\" rowspan=\"\" class=\"\" id=\"\">\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"td-content-wrapper\"><div class=\"td-content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tTerminal time deviation converges to 10-100 ms range for log alignment and basic forensic needs\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t        \t\t\t    <\/tbody>\n\t\t\t<\/table>\n\t\t<\/div>\n\t  \t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-34b4edf elementor-widget elementor-widget-spacer\" data-id=\"34b4edf\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-eee66fe e-flex e-con-boxed e-con e-parent\" data-id=\"eee66fe\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-3fa433c e-con-full e-flex e-con e-child\" data-id=\"3fa433c\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-57104e0 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"57104e0\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/wp-content\/uploads\/2025\/12\/\u9762\u5411\u667a\u80fd\u4ea4\u901a\u884c\u4e1a\u7684\u7edf\u4e00\u65f6\u9891\u89e3\u51b3\u65b9\u6848.pdf\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get the full full program<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-67d4a75 e-con-full e-flex e-con e-child\" data-id=\"67d4a75\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-38d9169 elementor-widget elementor-widget-text-editor\" data-id=\"38d9169\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Under the premise of unified clock reference, this program adopts T830 to build a time and frequency system architecture of \"unified base, multi-mode interface, and optimal algorithm\": through the hierarchical topology of first-level mother clock\/segment center\/area node, PTP, NTP, IRIG-B, and 1PPS can be accessed according to the business requirements in a graded manner, so that the time synchronization accuracy of key services can be converged to the level of microseconds to milliseconds under the condition of not forcing the whole network to be transformed. Under the condition of not forcing the whole network to be reformed, the time synchronization accuracy of key services is converged to the microsecond to millisecond level, providing an engineering-achievable time unification solution for urban traffic management, intelligent high-speed, rail transportation and vehicle-road coordination.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>This solution proposes a unified time and frequency solution for intelligent transportation, taking T830 clock server as the core and constructing a three-layer architecture of \"core-transmission-access\". It realizes sub-microsecond to millisecond level grading precision timing through multi-reference source intelligent source selection algorithm and PTP\/NTP dual engine. The solution supports multiple scenarios such as urban traffic management, intelligent high-speed, rail transportation, vehicle-road coordination, etc., and is compatible with the stock network, building a reliable, engineered and unified time reference for the intelligent transportation system.<\/p>","protected":false},"author":1,"featured_media":16992,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[278],"tags":[],"class_list":["post-17002","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-intelligent-transportation-solutions"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - 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