Mine Wireless Communication System Solution

Overview

This solution is designed to meet the high-safety and high-reliability requirements of mine communication in emergency rescue scenarios. It integrates core products such as mine intrinsically safe base stations, mine intrinsically safe phones, and (5G) mine intrinsically safe audio/video recorders to build a mine wireless communication system featuring "integrated sky-ground coverage, full-area coverage, and intelligent collaboration." With Mesh self-organizing network as the core network architecture, the system integrates multi-mode transmission technologies including 5G, WiFi6, and satellite communication, covering all scenarios of underground daily communication, dispatch command, data collection, and emergency rescue, providing stable, safe, and efficient communication support for coal mine safety production and emergency response.

1.1.1.2. Product Structure Design: Rationality and Advancement

1.1.1.2.1. Three-Layer Architecture Design Adapted to Complex Mine Scenarios

• Perception Layer: Composed of mine intrinsically safe phones, audio/video recorders, and tablet computers, responsible for front-end perception functions such as voice calls, audio/video capture, data reporting, and personnel positioning. The devices are lightweight and portable, suitable for operations in narrow underground tunnels.
• Network Layer: With mine intrinsically safe base stations as the core, a Mesh self-organizing network is constructed, supporting 10-hop relay and redundant communication. In the event of wired link failure, automatic switchover to wireless links occurs within 150ms, achieving seamless coverage across all underground tunnels. Paired with the HL-TG digital trunk gateway, it connects the underground private network with the surface PSTN/NGN network, enabling cross-network dispatch.
• Application Layer: The surface command platform (high-performance laptop) works in conjunction with multi-mode communication terminals, supporting remote dispatch, audio/video backhaul, and emergency distress command issuance, forming an integrated "underground-surface" command system.

1.1.1.2.2. Core Product Structure Highlights

• Modular Base Station Design: Features dual-band (2.4G/5.8G) dual RF output, supporting simultaneous operation in AP/Client/Mesh multi-modes. Equipped with Qualcomm WiFi6 chipset and MU-MIMO technology, multi-user concurrent transmission efficiency is improved by 3 times, suitable for high-data-volume scenarios such as HD video backhaul.
• Multi-Mode Terminal Integration: Integrates 5G full-network access, WiFi6, BeiDou positioning, and NFC identity recognition functions, with physical buttons + touch dual operation modes to meet gloved operation requirements underground. The (5G) audio/video recorder features built-in dual infrared lights and white light compensation for all-weather audio/video capture, supporting 5G real-time backhaul.
• Rich Expansion Interfaces: All devices are equipped with standardized interfaces such as Type-C and RJ45. The tablet computer supports four-option expansion including DB9 serial port and QR code module, while the base station supports dual access via optical port + electrical port, flexibly connecting to sensors, printers, and other peripherals.

1.1.1.3. Technical Leadership: Domestic/Industry Leading Level

1.1.1.3.1. Industry-Leading Core Technologies

• Cutting-Edge Communication Technology: Utilizes Qualcomm 802.11a/b/g/n/ac/ax full-protocol chipsets, supporting beamforming and ant colony path optimization algorithms, with wireless transmission rates up to 1800Mbps and roaming handover time <50ms, ranking at the leading level among domestic mine WiFi base stations.
• Multi-Mode Collaboration Innovation: Multi-mode terminals integrate Tiantong satellite communication and 5G networks. When no ground signal is available, calls and distress signals can be made via satellite. The satellite-assist feature lowers the operational threshold, with network access success rate ≥96%, making it one of the few satellite + ground dual-mode terminals adapted for mine emergency response in China.
• Intelligent Dispatch Capability: The digital trunk gateway supports SIP/H.323 protocols, with up to 120 concurrent calls, signaling encryption and NAT traversal functions, enabling cross-network HD voice dispatch between underground and surface, with technical indicators reaching advanced industry levels.

1.1.1.3.2. Authoritative Certification Endorsement

• All underground devices have passed mine intrinsically safe certification, with explosion-proof marking Ex ib I Mb, holding both MA (Mine Safety) certification and explosion-proof certification, fully compliant with the requirements of the "Coal Mine Safety Regulations."
• Core products such as base stations and phones have passed IP68 protection rating certification and US military standard drop resistance testing. The audio/video recorder has passed certification by the National Quality Supervision and Inspection Center for Explosion-Proof Electrical Products, with product compliance and reliability recognized by the industry.
• Both 5G modules and satellite communication modules adopt domestically produced core chips (such as UNISOC AP processors), with a domestic localization rate ≥80%, achieving independent and controllable technology, and receiving special certification from relevant authorities.

1.1.1.4. Operational Stability and Safety: Reliable and Convenient

1.1.1.4.1. Stable Operation Guarantee

• Hardware Redundancy Design: Base stations are equipped with 2 x 4AH mine manganese lithium batteries, with single-battery endurance ≥36h and automatic switchover upon external power interruption. The digital trunk gateway adopts dual network ports + dual power supply design, achieving seamless switchover in the event of line or power failure, ensuring uninterrupted communication.
• Harsh Environment Resistance: All devices operate within a temperature range of -40℃ to 70℃, withstanding underground humidity, vibration, and electromagnetic interference. The phone's impact resistance reaches 500m/s², and the base station can withstand 1.2-meter drops, adapting to complex working conditions.
• Network Self-Healing Capability: The Mesh self-organizing network supports automatic node discovery and dynamic route optimization. When a single base station fails, surrounding nodes automatically fill the coverage gap, achieving network reliability of 99.9%, meeting the 24-hour continuous operation requirements of mines.

1.1.1.4.2. Ultimate Safety Protection

• Intrinsically Safe Design: Device circuits adopt current-limiting and voltage-limiting protection, and batteries feature overcharge, over-discharge, and short-circuit protection, eliminating the generation of electric sparks and adapting to methane and coal dust explosion environments.
• Data Security Assurance: The audio/video recorder supports NARI T-card encrypted storage, with files carrying non-editable watermarks. The tablet computer features built-in TPM hardware encryption and fingerprint recognition to prevent data leakage.
• Emergency Safety Functions: Terminals are equipped with a one-key SOS distress button. The T950 supports triple distress via "call + SMS + positioning," and supports PTT public network intercom and in-network emergency calls, with emergency response time ≤3 seconds.

1.1.1.4.3. Operational Convenience Optimization

• Plug-and-Play Deployment: Base stations require no on-site configuration, automatically forming networks upon power-on, with deployment completed within 10 minutes in emergency scenarios. Terminals adopt one-key operation, with recording, video capture, and intercom functions all triggered by dedicated buttons.
• User-Friendly Interaction: Phones and tablet computers support wet-touch and gloved operation, with display brightness ≥400cd/㎡ for clear visibility in dark underground environments. The surface command platform supports real-time audio/video backhaul and remote dispatch, with a simple and intuitive operation interface.

1.1.1.5. Performance Indicators: Meeting and Exceeding Industry Requirements

Product Type	Core Performance Indicators	Industry Standard Requirements	Performance of This Solution
Mining Wireless Base Station	Transmission rate, roaming time	Rate ≤300Mbps, roaming ≤200ms	Rate up to 1800Mbps, roaming <50ms
Mining Intrinsically Safe Handset	Positioning accuracy, battery life	Meter-level positioning, battery life ≥8 hours	Centimeter-level multi-mode positioning, battery life ≥11 hours
Audio/Video Recorder	Recording resolution, night vision range	1080P resolution, face recognition at 3 meters	2K HD recording, face recognition at 5 meters, human silhouette recognition at 10 meters

Digital Trunking Gateway	Concurrent Calls	≤80 channels	Up to 120 channels, supports 1:10 subscriber expansion
Multi-mode Communication Terminal	Satellite Call Duration	≥8 hours	Satellite calls ≥10 hours, short message supports 1000 Chinese characters

1.1.1.6. Material Selection and Manufacturing Processes: Premium Quality and High Efficiency

1.1.1.6.1. Rationality of Material Selection

· All equipment enclosures are made of ABS engineering plastic, offering high strength, wear resistance, and corrosion resistance, with a continuous surface area of <100cm², meeting the heat dissipation requirements for intrinsically safe equipment; base stations and tablet PCs feature anti-slip textures on their enclosures to enhance grip stability underground.

· Field optical cables adopt a TPU outer sheath + stainless steel spiral armor + aramid yarn reinforcement structure, providing tensile and abrasion resistance, waterproofing, dustproofing, and rodent/insect protection, with a tensile strength of up to 1500N, suitable for repeated deployment and retrieval in underground environments.

· Batteries use mining-grade lithium manganate cells with a safe voltage design (3.7V/4.2V), a cycle life of ≥500 charge/discharge cycles, and no explosion risk, complying with intrinsically safe power supply standards for coal mines.

1.1.1.6.2. Advanced Manufacturing Processes

· The audio/video recorder features a two-shot injection molded, integrally die-cast body with seamless construction, achieving IP68-rated waterproof and dustproof protection; base stations and phones utilize SMT (Surface Mount Technology) assembly, with compact component layouts and strong anti-interference capability.

· Interfaces adopt a quick-connect design, enabling fast docking for charging and data transmission; displays feature an AG anti-glare coating with anti-reflection treatment, improving visibility under strong light by 50%, adapted to the complex lighting conditions underground.

· Product surfaces are finished with powder coating, providing corrosion resistance and scratch protection, with no visible wear during long-term underground use, extending equipment service life.

1.1.1.7. Solution Summary

This solution integrates industry-leading mining-grade intrinsically safe communication equipment to build a mine wireless communication system featuring "full coverage, high data rates, safety and reliability, and ease of operation," fully meeting the communication requirements of daily underground operations and emergency rescue in coal mines. The core advantages of the solution are reflected in: a three-tier architecture adapted to complex scenarios, domestically leading core technologies, ultimate safety protection, performance indicators exceeding industry standards, and premium materials and efficient manufacturing processes. All equipment has passed authoritative certifications and is suitable for explosive atmospheres in mines.

The solution can be widely applied in scenarios such as underground tunneling, mining, transportation, and emergency rescue in coal mines, providing solid communication support for digital mine construction and contributing to the improvement of coal mine safety production levels.