{"id":15636,"date":"2025-06-06T03:33:22","date_gmt":"2025-06-06T03:33:22","guid":{"rendered":"https:\/\/www.lansitec.com\/?p=15636"},"modified":"2026-08-26T10:49:00","modified_gmt":"2026-08-26T02:49:00","slug":"metrolink-technical-deployment-deep-dive-building-a-scalable-underground-tracking-system","status":"publish","type":"post","link":"https:\/\/www.lansitec.com\/it\/blogs\/approfondimento-dellimplementazione-tecnica-di-metrolink-creazione-di-un-sistema-di-tracciamento-sotterraneo-scalabile\/","title":{"rendered":"Analisi approfondita dell&#039;implementazione tecnica di MetroLink: creazione di un sistema di tracciamento sotterraneo scalabile"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"15636\" class=\"elementor elementor-15636\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-94920ea elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"94920ea\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-39cea0a\" data-id=\"39cea0a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4746574 elementor-widget elementor-widget-text-editor\" data-id=\"4746574\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Introduction to MetroLink Technical Deployment<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cc5d8c8 elementor-widget elementor-widget-text-editor\" data-id=\"cc5d8c8\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Following the success of MetroLink\u2019s deployment of Lansitec\u2019s <strong><a href=\"https:\/\/www.lansitec.com\/products\/helmet-beacon\/\">B011 Helmet Beacons<\/a><\/strong> for underground worker safety, the next logical step is a technical breakdown. This part of the case study explores how MetroLink implemented a full-stack positioning infrastructure underground, relying on <strong><a href=\"https:\/\/www.bluetooth.com\/bluetooth-resources\/bluetooth-core-5-1-feature-overview\/\" target=\"_blank\" rel=\"noopener\">Bluetooth 5.1<\/a> Angle of Arrival (AoA)<\/strong> technology, <strong><a href=\"https:\/\/www.lansitec.com\/gateways\/\">macro\/solar gateways<\/a><\/strong>, and <strong>LoRaWAN-based backhaul<\/strong> to deliver a seamless, real-time location tracking system.<\/p>\n<p>\u00a0<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>By blending accuracy, battery efficiency, and connectivity resilience, MetroLink\u2019s system proves that Bluetooth AoA combined with <a href=\"https:\/\/www.lansitec.com\/th\/\u0e25\u0e2d\u0e23\u0e32\u0e27\u0e31\u0e19\/\">LoRaWAN<\/a> is a powerful and scalable architecture for complex subterranean environments, including metro rail infrastructure.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2ccf6c7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2ccf6c7\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d30669b\" data-id=\"d30669b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a730fcb elementor-widget elementor-widget-text-editor\" data-id=\"a730fcb\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Core Components<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7b89e209 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7b89e209\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-37ad99b4\" data-id=\"37ad99b4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3680ddf4 elementor-widget elementor-widget-text-editor\" data-id=\"3680ddf4\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<!-- wp:heading --><!-- \/wp:paragraph --><!-- wp:heading -->\n<h2 class=\"wp-block-heading\"><b>B011 Helmet Beacon<\/b><\/h2>\n<p>[visual-link-preview encoded=&#8221;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&#8221;]<\/p>\n<p>The B011 served as the primary wearable device, selected for its:<\/p>\n<ul>\n<li aria-level=\"1\"><b><a href=\"https:\/\/www.lansitec.com\/th\/blogs\/\u0e04\u0e39\u0e48\u0e21\u0e37\u0e2d\u0e40\u0e01\u0e35\u0e48\u0e22\u0e27\u0e01\u0e31\u0e1a\u0e1a\u0e25\u0e39\u0e17\u0e39\u0e18\u0e40\/\">Bluetooth 5.1<\/a> AoA support<\/b><\/li>\n<li aria-level=\"1\"><b>1200mAh rechargeable battery<\/b> (1-year runtime at 0.5s intervals)<\/li>\n<li aria-level=\"1\"><b>IP66 ingress protection<\/b><\/li>\n<li aria-level=\"1\">An optional <b>buzzer<\/b> for audio alerts and worker recall<\/li>\n<li aria-level=\"1\">Adjustable advertising intervals: 100ms to 10s<\/li>\n<li aria-level=\"1\">Weight: only 90g \u2014 ideal for helmet mounting<\/li>\n<\/ul>\n<p>These <a href=\"https:\/\/www.lansitec.com\/th\/\u0e1a\u0e35\u0e04\u0e2d\u0e19\u0e1a\u0e25\u0e39\u0e17\u0e39\u0e18-2\/\">beacons<\/a> constantly broadcast positioning packets. When received by surrounding <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a> equipped with AoA antenna arrays, they enable 2D trilateration to estimate precise location.<\/p>\n<h3><b> Macro Bluetooth Gateways (LoRaWAN)<\/b><\/h3>\n<p>[visual-link-preview encoded=&#8221;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&#8221;]<\/p>\n<p>Installed every <b>80\u2013100 meters<\/b> within the tunnels, these <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a>:<\/p>\n<ul>\n<li aria-level=\"1\">Receive BLE packets from nearby <a href=\"https:\/\/www.lansitec.com\/th\/\u0e1a\u0e35\u0e04\u0e2d\u0e19\u0e1a\u0e25\u0e39\u0e17\u0e39\u0e18-2\/\">beacons<\/a> (range ~100\u2013150m line-of-sight)<\/li>\n<li aria-level=\"1\">Use <b>AoA antenna arrays<\/b> to calculate signal direction<\/li>\n<li aria-level=\"1\">Relay position data to the <a href=\"https:\/\/www.lansitec.com\/th\/\u0e25\u0e2d\u0e23\u0e32\u0e27\u0e31\u0e19\/\">LoRaWAN<\/a> server via <b>long-range uplinks<\/b><\/li>\n<li aria-level=\"1\">Feature <b>38,000mAh batteries<\/b>, providing 3\u20135 years of autonomous operation<\/li>\n<li aria-level=\"1\">Are IP66-rated and industrial-grade for underground conditions<\/li>\n<\/ul>\n<h3><b> Indoor &amp; Solar Bluetooth Gateways<\/b><\/h3>\n<p>[visual-link-preview encoded=&#8221;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&#8221;]<\/p>\n<ul>\n<li aria-level=\"1\"><b><a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">Indoor Gateways<\/a><\/b>: Installed in technical rooms, depots, control centers (PoE-powered, ceiling mounted)<\/li>\n<li aria-level=\"1\"><b>Solar <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">Gateways<\/a><\/b>: Used above ground at tunnel entry points and in service yards\n<ul>\n<li aria-level=\"2\">Equipped with <b>5300mAh solar-rechargeable batteries<\/b><\/li>\n<li aria-level=\"2\">Designed for <b>continuous operation<\/b>, even in overcast conditions<\/li>\n<li aria-level=\"2\">Report via <a href=\"https:\/\/www.lansitec.com\/th\/\u0e25\u0e2d\u0e23\u0e32\u0e27\u0e31\u0e19\/\">LoRaWAN<\/a> just like macro <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3><b> LoRaWAN Network<\/b><\/h3>\n<p>The <a href=\"https:\/\/www.lansitec.com\/th\/\u0e25\u0e2d\u0e23\u0e32\u0e27\u0e31\u0e19\/\">LoRaWAN<\/a> infrastructure was the backbone of the communication flow:<\/p>\n<ul>\n<li aria-level=\"1\">Provided low-power, long-range uplink connectivity from all <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a><\/li>\n<li aria-level=\"1\">Encrypted with AES-128<\/li>\n<li aria-level=\"1\">Operated on the <b>AU915<\/b> band to comply with regional regulations<\/li>\n<li aria-level=\"1\">Centralized data routed to MetroLink\u2019s control system for visualization, alerts, and analytics<\/li>\n<\/ul>\n<!-- wp:heading -->\n<h2 class=\"wp-block-heading\"><strong>Bluetooth AoA Positioning: How It Works<\/strong><\/h2>\n<!-- \/wp:heading -->\n<p>Bluetooth Angle of Arrival (AoA) is the key technology behind MetroLink\u2019s precise underground worker tracking.<br \/>Here\u2019s how it operates in the field:<\/p>\n<ol>\n<li aria-level=\"1\"><b>The B011 Beacon<\/b> emits a Bluetooth signal at intervals (e.g., every 500ms).<\/li>\n<li aria-level=\"1\"><b>At least two AoA-enabled <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a><\/b> receive the signal simultaneously.<\/li>\n<li aria-level=\"1\">Each gateway calculates the <b>angle<\/b> from which the signal arrived using its antenna array.<\/li>\n<li aria-level=\"1\">The system triangulates the beacon\u2019s position by overlaying angles from multiple <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a>.<\/li>\n<li aria-level=\"1\">The position is sent via <a href=\"https:\/\/www.lansitec.com\/th\/\u0e25\u0e2d\u0e23\u0e32\u0e27\u0e31\u0e19\/\">LoRaWAN<\/a> to the control center.<\/li>\n<\/ol>\n<p><b>Positioning Accuracy Achieved:<\/b><\/p>\n<ul>\n<li aria-level=\"1\">Average: <b>1.5\u20133 meters<\/b><\/li>\n<li aria-level=\"1\">In optimal tunnel geometry: up to <b>1 meter<\/b><\/li>\n<li aria-level=\"1\">In congested areas (e.g., junctions): ~3.5 meters due to signal reflection<\/li>\n<\/ul>\n<!-- wp:heading -->\n<h2 class=\"wp-block-heading\"><strong>Deployment Planning<\/strong><\/h2>\n<!-- \/wp:heading -->\n<h3><b>Signal Survey &amp; Coverage Mapping<\/b><\/h3>\n<p>Before full rollout, MetroLink\u2019s tech team conducted a tunnel-wide <b>RF survey<\/b> using demo <a href=\"https:\/\/www.lansitec.com\/th\/\u0e1a\u0e35\u0e04\u0e2d\u0e19\u0e1a\u0e25\u0e39\u0e17\u0e39\u0e18-2\/\">beacons<\/a> and signal sniffers to:<\/p>\n<ul>\n<li aria-level=\"1\">Identify high-reflection zones (metal grates, curved walls)<\/li>\n<li aria-level=\"1\">Optimize gateway spacing (tighter in curves\/intersections)<\/li>\n<li aria-level=\"1\">Ensure <b>redundancy<\/b> (3 <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a> per zone for triangulation)<\/li>\n<\/ul>\n<p><b>Typical Gateway Layout:<\/b><\/p>\n<ul>\n<li aria-level=\"1\">Straight Tunnels: 1 per 80\u2013100 meters<\/li>\n<li aria-level=\"1\">Junction Zones: 3 in a triangle pattern every 50 meters<\/li>\n<li aria-level=\"1\">Emergency Escape Shafts: 1 Solar Gateway at surface<\/li>\n<\/ul>\n<h3><b>Deployment Phases<\/b><\/h3>\n<p><b>Phase 1: Central Loop Pilot<\/b><\/p>\n<ul>\n<li aria-level=\"1\">12-km test section<\/li>\n<li aria-level=\"1\">50 <a href=\"https:\/\/www.lansitec.com\/th\/\u0e1a\u0e35\u0e04\u0e2d\u0e19\u0e1a\u0e25\u0e39\u0e17\u0e39\u0e18-2\/\">beacons<\/a> issued to field techs<\/li>\n<li aria-level=\"1\">40 macro <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a> deployed<\/li>\n<li aria-level=\"1\">Solar units tested at 3 surface portals<\/li>\n<\/ul>\n<p><b>Results:<\/b><\/p>\n<ul>\n<li aria-level=\"1\">95% location coverage<\/li>\n<li aria-level=\"1\">3m accuracy median<\/li>\n<li aria-level=\"1\">The fall detection pilot was tested with positive feedback<\/li>\n<\/ul>\n<p><b>Phase 2: Network-Wide Rollout<\/b><\/p>\n<ul>\n<li aria-level=\"1\">400 Helmet <a href=\"https:\/\/www.lansitec.com\/th\/\u0e1a\u0e35\u0e04\u0e2d\u0e19\u0e1a\u0e25\u0e39\u0e17\u0e39\u0e18-2\/\">Beacons<\/a> issued<\/li>\n<li aria-level=\"1\">325 Macro <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">Gateways<\/a> installed<\/li>\n<li aria-level=\"1\">45 <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">Indoor Gateways<\/a> placed in stations and hubs<\/li>\n<li aria-level=\"1\">30 Solar <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">Gateways<\/a> for external access zones<\/li>\n<\/ul>\n<h3><b>Data Flow &amp; Platform Integration<\/b><\/h3>\n<ol>\n<li aria-level=\"1\"><b>Beacon Transmits \u2192 Gateway Receives (AoA)<\/b><\/li>\n<li aria-level=\"1\">Gateway calculates the location and encrypts the payload<\/li>\n<li aria-level=\"1\"><b><a href=\"https:\/\/www.lansitec.com\/th\/\u0e25\u0e2d\u0e23\u0e32\u0e27\u0e31\u0e19\/\">LoRaWAN<\/a> Gateway Uplink<\/b>\n<ul>\n<li aria-level=\"2\">Range: 1.5\u20132km even in an urban environment<\/li>\n<li aria-level=\"2\">Uplink rate: 1 location packet every 5 seconds (configurable)<\/li>\n<\/ul>\n<\/li>\n<li aria-level=\"1\">The central server receives and decodes the payload<\/li>\n<li aria-level=\"1\">Control room operators&#8217; view:\n<ul>\n<li aria-level=\"2\">Live map of personnel<\/li>\n<li aria-level=\"2\">Geofence status<\/li>\n<li aria-level=\"2\">Alerts (fall, SOS, zone violations)<\/li>\n<li aria-level=\"2\">Equipment location (via Container <a href=\"https:\/\/www.lansitec.com\/th\/\u0e15\u0e31\u0e27\u0e15\u0e34\u0e14\u0e15\u0e32\u0e21\/\">Trackers<\/a>)<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>Data was fed into MetroLink\u2019s SCADA-compatible dashboard via API bridge.<\/p>\n<h3><b>Key Challenges and Solutions<\/b><\/h3>\n<table>\n<thead>\n<tr>\n<th>\n<p><b>Challenge<\/b><\/p>\n<\/th>\n<th>\n<p><b>Resolution<\/b><\/p>\n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\n<p>Signal reflection in tight tunnels<\/p>\n<\/td>\n<td>\n<p>Extra gateway density + adaptive triangulation<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Battery access for ceiling-mounted units<\/p>\n<\/td>\n<td>\n<p>All devices selected with <b>3\u20135 year batteries<\/b><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Worker adoption<\/p>\n<\/td>\n<td>\n<p>Simple plug-and-play design; no UX learning<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Beacon collision at high density<\/p>\n<\/td>\n<td>\n<p>Staggered advertising intervals by location<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><b>System Security and Resilience<\/b><\/h3>\n<ul>\n<li aria-level=\"1\"><b>Encryption<\/b>: AES-128 on both Bluetooth and <a href=\"https:\/\/www.lansitec.com\/th\/\u0e25\u0e2d\u0e23\u0e32\u0e27\u0e31\u0e19\/\">LoRaWAN<\/a> layers<\/li>\n<li aria-level=\"1\"><b>Fail-safes<\/b>:\n<ul>\n<li aria-level=\"2\">Local caching: <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a> store 40 recent positions if the connection fails<\/li>\n<li aria-level=\"2\">SOS button functionality even during temporary uplink outages<\/li>\n<li aria-level=\"2\"><b><a href=\"https:\/\/www.lansitec.com\/th\/blogs\/fota-\u0e43\u0e19\u0e23\u0e30\u0e14\u0e31\u0e1a\u0e02\u0e19\u0e32\u0e14\u0e43\u0e2b\u0e0d\u0e48-\u0e08\u0e30\u0e23\u0e31\u0e01\u0e29\/\">FOTA<\/a><\/b> (Firmware Over-the-Air): Supported on <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a> and <a href=\"https:\/\/www.lansitec.com\/th\/\u0e1a\u0e35\u0e04\u0e2d\u0e19\u0e1a\u0e25\u0e39\u0e17\u0e39\u0e18-2\/\">beacons<\/a> for remote updates<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<!-- wp:heading -->\n<h2 class=\"wp-block-heading\"><strong>Lessons Learned<\/strong><\/h2>\n<!-- \/wp:heading -->\n<p><b>Fine-Tuning AoA Algorithms<\/b><\/p>\n<p>MetroLink collaborated with Lansitec\u2019s engineers to:<\/p>\n<ul>\n<li aria-level=\"1\">Calibrate antennas for tunnel curvature<\/li>\n<li aria-level=\"1\">Tune algorithms to compensate for bounce interference<\/li>\n<li aria-level=\"1\">Use <b>filtered <a href=\"https:\/\/www.lansitec.com\/th\/blogs\/\u0e01\u0e32\u0e23\u0e23\u0e30\u0e1a\u0e38\u0e15\u0e33\u0e41\u0e2b\u0e19\u0e48\u0e07\u0e20\u0e32\u0e22\u0e43\u0e19\u0e2d\u0e32\u0e04\/\">RSSI<\/a> + AoA<\/b> fusion for edge accuracy<\/li>\n<\/ul>\n<p><b>Infrastructure Redundancy is Non-Negotiable<\/b><\/p>\n<p>Dual-layer coverage (AoA + fallback zone triangulation) ensured worker positions could be resolved even with a failed node.<\/p>\n<p><b>Gateway Battery Planning Matters<\/b><\/p>\n<p>Macro <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a> required <b>less frequent servicing<\/b>, but battery modeling was essential, including temperature-based drain rate simulations.<\/p>\n<!-- wp:heading -->\n<h2 class=\"wp-block-heading\"><strong>Future Expansion: Technical Plans<\/strong><\/h2>\n<!-- \/wp:heading -->\n<p>MetroLink\u2019s roadmap includes:<\/p>\n<ul>\n<li aria-level=\"1\"><b>Edge AI modules<\/b> at <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">gateways<\/a> for local anomaly detection<\/li>\n<li aria-level=\"1\"><b>Temperature <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e0b\u0e47\u0e19\u0e40\u0e0b\u0e2d\u0e23\u0e4c\/\">sensors<\/a><\/b> in <a href=\"https:\/\/www.lansitec.com\/th\/\u0e1a\u0e35\u0e04\u0e2d\u0e19\u0e1a\u0e25\u0e39\u0e17\u0e39\u0e18-2\/\">beacons<\/a> for fire safety alerting<\/li>\n<li aria-level=\"1\"><b>Zone-specific alerts<\/b> via buzzer feedback (e.g., entering hazard zones)<\/li>\n<li aria-level=\"1\"><b>Contractor Beacon Pooling<\/b>: a temporary beacon issuance system with expiration protocols<\/li>\n<\/ul>\n<!-- wp:heading -->\n<h2 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h2>\n<!-- \/wp:heading -->\n<p>The technical success of MetroLink\u2019s Bluetooth AoA tracking deployment lies in <b>planning, device synergy, and operational realism<\/b>. By combining Lansitec\u2019s <b>B011 Helmet <a href=\"https:\/\/www.lansitec.com\/th\/\u0e1a\u0e35\u0e04\u0e2d\u0e19\u0e1a\u0e25\u0e39\u0e17\u0e39\u0e18-2\/\">Beacons<\/a><\/b>, <b>Macro <a href=\"https:\/\/www.lansitec.com\/th\/\u0e40\u0e01\u0e15\u0e40\u0e27\u0e22\u0e4c\/\">Gateways<\/a><\/b>, <b>Solar units<\/b>, and <b><a href=\"https:\/\/www.lansitec.com\/th\/\u0e25\u0e2d\u0e23\u0e32\u0e27\u0e31\u0e19\/\">LoRaWAN<\/a> connectivity<\/b>, the authority achieved a system that is not only precise but rugged, autonomous, and scalable.<\/p>\n<p>In today\u2019s metro infrastructure, safety is no longer a manual task. It&#8217;s <b>engineered, wireless, and always-on<\/b>.<\/p>\n<!-- wp:visual-link-preview\/link {\"image_id\":-1,\"type\":\"external\",\"url\":\"https:\/\/www.lansitec.com\/blogs\/improving-metro-safety-and-efficiency-with-real-time-tracking-the-metrolink-lansitec-partnership\/\",\"nofollow\":true,\"new_tab\":true,\"encoded\":\"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\"} -->\n<div class=\"wp-block-visual-link-preview-link\"><img decoding=\"async\" class=\"vlp-image\" src=\"https:\/\/www.lansitec.com\/wp-content\/uploads\/2025\/06\/Improving-Metro-Safety-and-Efficiency-with-Real-Time-Tracking.jpg\" alt=\"\" title=\"\">\n<h3>Improving Metro Safety and Efficiency with Real-Time Tracking: The MetroLink \u2013 Lansitec Partnership &#8211; Lansitec<\/h3>\n<div class=\"summary\">For MetroLink Operations, a mid-sized Australian metro transit operator, this challenge became urgent: with over 400 workers managing more than 75 kilometers<\/div>\n<\/div>\n<!-- \/wp:visual-link-preview\/link --><!-- wp:paragraph -->\n<p>\u00a0<\/p>\n<!-- \/wp:paragraph -->\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Introduction to MetroLink Technical Deployment Following the success of MetroLink\u2019s deployment of Lansitec\u2019s B011 Helmet Beacons for underground worker safety, the next logical step is a technical breakdown. This part of the case study explores how MetroLink implemented a full-stack positioning infrastructure underground, relying on Bluetooth 5.1 Angle of Arrival (AoA) technology, macro\/solar gateways, and&hellip;&nbsp;<a href=\"https:\/\/www.lansitec.com\/it\/blogs\/approfondimento-dellimplementazione-tecnica-di-metrolink-creazione-di-un-sistema-di-tracciamento-sotterraneo-scalabile\/\" rel=\"bookmark\">Leggi tutto \u00bb<span class=\"screen-reader-text\">Analisi approfondita dell&#039;implementazione tecnica di MetroLink: creazione di un sistema di tracciamento sotterraneo scalabile<\/span><\/a><\/p>","protected":false},"author":12,"featured_media":15669,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[89],"tags":[],"class_list":["post-15636","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-iot-case-studies"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/posts\/15636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/comments?post=15636"}],"version-history":[{"count":1,"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/posts\/15636\/revisions"}],"predecessor-version":[{"id":19014,"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/posts\/15636\/revisions\/19014"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/media\/15669"}],"wp:attachment":[{"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/media?parent=15636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/categories?post=15636"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lansitec.com\/it\/wp-json\/wp\/v2\/tags?post=15636"}],"curies":[{"name":"parola chiave","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}