The tunnel emergency communication system is a dedicated communication system for the driver who is driving on the expressway tunnel to provide emergency rescue in the event of an accident. With the large-scale construction of global high-speed railways, the number of ultra-long tunnels has increased dramatically. How to solve the emergency communication guarantees in the event of a disaster emergency inside the tunnel, and ensure that the comprehensive command of the railway command centers at the disaster site becomes A question that needs attention.

The railway tunnel dedicated emergency voice system can solve the following problems:

1. Terminal equipment and control equipment in the tunnel that can adapt to harsh environments.

2. Networking technology that adapts to the basic conditions of long tunnels.

3. The tunnel equipment is connected to the flexible networking of the station, dispatch center and emergency center.

4. The tunnel terminal can be accurately located, remotely monitored, maintained, and managed.

5, in line with the requirements of simple cable laying, the number of thrift.

Wireless Mesh (WMN), also known as wireless mesh or wireless mesh network, is composed of multiple types of nodes, with mesh as the basic topology: self-organizing network, self-repairing, multi-hopping Wireless new network architecture featuring cascading, self-organization and self-management. Often used in military, public security, armed police, forest fire prevention and other fields.

System advantage

Non-line-of-sight transmission (NLOS)

Nesh configuration can be easily realized by Mesh ad hoc network technology. Its automatic relay feature can easily realize over-the-horizon transmission. The signal can automatically select the best path to continuously jump from one node to another, and finally arrive without direct view. The target node from the distance. Key technologies for solving the “last mile” problem in various fields.

Strong mobility

The occurrence of an emergency has great uncertainty, and the event scene changes volatility. Therefore, it is necessary to set up a temporary portable base station on site according to the occurrence of the emergency. The on-site portable base station is temporary, it is established as the scene appears, and is withdrawn at the end of the event.

High reliability

The wireless Mesh self-organizing mobile base station adopts military standard design: it is easy to carry, sturdy and durable, waterproof and dustproof, and is suitable for rapid deployment to meet the communication requirements of the emergency site in various harsh environments. In the case of a traditional WLAN network, if an AP uplink fails, all clients on the AP will not be able to access the WLAN network. Wireless Mesh has the characteristics of self-organizing network and self-repair. Therefore, AP nodes in a mesh network usually have multiple available links, which can effectively avoid single point of failure.

Rapid deployment

In the face of sudden incidents, how to timely, accurately, quickly and deeply grasp the real-time dynamic information of the event site, plays a vital role in whether the commanders at all levels can make correct judgments and determine the operational determination. The wireless Mesh self-organizing network high-performance portable base station adopts single-frequency networking, and strives to simplify the on-site configuration and deployment difficulty to the greatest extent, and meets the requirements of the first-line combat personnel for rapid network construction and zero configuration under emergency conditions.