Application Solution of MESH Ad-Hoc Network in Emergency Communications

1.Introduction
Emergency communication is a special rapid-response mechanism that integrates various communication resources to ensure emergency rescue and essential communications during natural or man-made emergencies. When natural disasters or unexpected incidents threaten people's lives and property, and normal communication cannot be guaranteed, quickly establishing a reliable MESH self-organizing network communication system becomes crucial for emergency response and disaster relief operations.

2.Application Requirements
While efficient emergency communication plays a key role, public safety departments often face challenges such as lack of situational awareness, slow emergency response, and difficulties in interdepartmental coordination. Audio and video have become increasingly important in public safety incident handling, with visual information transmission becoming mainstream. To meet the practical needs of emergency operations under new circumstances, Suntor has developed a MESH emergency communication system that integrates video surveillance, data collection, professional broadband trunking, and emergency communications, achieving visualized command and dispatch.

3.Solution Overview
Field personnel can carry portable self-organizing network radios with integrated video and voice modules, enabling wired or wireless connections with helmet-mounted cameras and bone conduction headphones. The on-site audio and video feeds can be transmitted through individual self-organizing network devices to forward command platforms, and then to central command platforms through system interfaces.
The individual self-organizing network devices also feature WiFi coverage, enabling interconnection with personal smart terminals. Handheld sensors, tablets and other equipment can connect to the entire network through the WiFi of self-organizing network devices.
The system enables:
Intercommunication between individual personnel
Connection between personnel and on-site command platforms
Linkage between forward platforms and central command through 4G networks, satellite networks, or pre-deployed backbone wireless transmission networks (where MESH self-organizing base stations can be installed at backbone nodes).
Ultimately forming a comprehensive command and dispatch system.

4. Solution Features
Strong Environmental Adaptability: The system can operate in non-line-of-sight environments and adapt to complex geographical conditions during emergencies.

Wide Coverage:
5-20km coverage per central station in plains, moderately hilly terrain or multi-building urban environments (coverage distance relates to antenna height).
20-40km coverage under line-of-sight conditions.

Strong Anti-Interference Capability:
Devices can automatically adjust modulation methods and transmission power based on channel conditions to eliminate interference from other signals. Specific carriers can also be manually disabled to prevent interference with others.

Excellent Anti-Fading Performance:
The OFDM technology employed provides strong resistance to multipath fading. OFDM transmits data through multiple subcarriers, with each subcarrier's signal duration being much longer than in single-carrier systems at the same rate, giving OFDM strong resistance to impulse noise and fast channel fading.

Flexible Networking:
True plug-and-play operation using Suntor's proprietary MESH communication protocol. With Ethernet interface and transparent transmission, devices automatically form networks upon power-up after connection. The system is easily expandable, allowing switching between different modes based on network scale, structure and rate requirements.

Real-Time Monitoring:
Enables efficient interaction and accurate command and dispatch capabilities.

Emergency Alerting:
Quickly locates personnel triggering alarms and provides immediate response.

Multi-Channel Data Transmission:
Ensures smooth real-time dispatch and communication between command centers and field personnel.

Multi-Level Dispatch:
Allows selection of different dispatch command levels for rapid and accurate emergency response.

Excellent Mobility:
Through comprehensive system design and advanced technologies, the theoretical maximum supported speed reaches 800km/h. Field tests have achieved:
160km/h for ground vehicles
250-360km/h for aircraft
Making it particularly suitable for high-speed mobile environments including airborne, vehicle-mounted and shipborne applications.

Outstanding Reliability:
The design fully considers EMC compliance, shock resistance, and adaptation to various temperature and humidity conditions for field operations.

User-Friendly Operation:
Simple and intuitive operation requiring no special training. The devices provide transparent Ethernet data transmission without requiring additional configuration, supporting all network-based data transmission.

Customization Services:
Provides personalized multi-platform system solutions.

Self-Diagnosis Function:
Automatically notifies command centers and maintenance personnel when components fail.

Cost-Effective:
The system offers cost advantages compared to standard trunking modes for various industries' digital management needs.

Easy Maintenance:
Compatible with multiple frequency bands, various voice communications, and data access for convenient maintenance.

Low Operating Costs:
No usage fees other than personnel costs during operation.