The Mesh wireless ad hoc network system is a mobile broadband multimedia communication system designed with a new `wireless mesh network` concept. All system nodes can achieve real-time interaction of multi-channel voice, data, images and other multimedia information under non-line-of-sight and fast-moving conditions using the distributed network architecture of the centerless ad hoc network. At the same time, the system supports any network topology, each node device can move randomly and quickly, and the system topology can be quickly changed and updated without affecting system transmission. The overall system is easy to deploy, flexible to use, simple to operate and easy to maintain.

The Mesh wireless ad hoc network system is a mobile broadband multimedia communication system designed with a new “wireless mesh network” concept. All system nodes can achieve real-time interaction of multi-channel voice, data, images and other multimedia information under non-line-of-sight and fast-moving conditions using the distributed network architecture of the centerless ad hoc network. At the same time, the system supports any network topology, each node device can move randomly and quickly, and the system topology can be quickly changed and updated without affecting system transmission. The overall system is easy to deploy, flexible to use, simple to operate and easy to maintain.

Mesh self-organizing network is a new wireless network technology that is completely different from traditional wireless networks. In a Mesh network, each node is not a separate wireless repeater, but is interconnected, that is, each node is connected to several channels to form an overall network. The advantage is that when a line is blocked or unresponsive, the node can autonomously choose other lines for data transmission, and the network access will not be affected by the failure of a certain node, and the reliability is very strong. Let’s take a look at the functional applications of Mesh self-organizing network.

Video Command

The video acquisition equipment of each combat team member and drone is connected to the wireless ad hoc network node through Ethernet port or WIFI wirelessly, and the system is used to achieve real-time two-way interconnection with the audio and video dispatching platform of the command vehicle and the commander who leaves the vehicle. The command vehicle and the commander who leaves the vehicle can retrieve the video images sent back by one or more combat team members at any time through the audio and video dispatching platform or handheld command terminal for real-time command decision-making.

Voice communication

The VOIP communication equipment of each combat team member is connected to the wireless ad hoc network node through the Ethernet port or WIFI wirelessly, and the system realizes real-time two-way interconnection with the audio and video dispatching platform of the command vehicle and the commander who leaves the vehicle. The command vehicle and the commander who leaves the vehicle can make voice calls such as single call, group call and group call to a single or multiple combat team members at any time through the audio and video dispatching platform or handheld command terminal, realizing real-time two-way voice communication between individual combat team members, commanders who leave the vehicle and combat team members.

Location information sharing

After each wireless ad hoc network system is positioned by Beidou/GPS, its location information can be transmitted to the command vehicle or the command information terminal of the commander who leaves the vehicle through the wireless ad hoc network system. Realize the real-time positioning of each combat team member and drone by the commander in the vehicle or off the vehicle. Each wireless ad hoc network node can be positioned by GPS/Beidou, and the location information can be transmitted and shared to other wireless ad hoc network nodes through the wireless ad hoc network system. This system adopts the NMEA0183 international standard protocol and is effectively compatible with various positioning devices. The wireless ad hoc network node is connected to the positioning device through the RS232/485 serial interface, receives the location information from the GPS/Beidou positioning device, and converts it into IP data to distribute it to other wireless ad hoc network nodes and display it on the control interface of the wireless ad hoc network.

The network has no center and can be flexibly deployed as needed. It does not require infrastructure support such as computer rooms and transmission networks. It can be networked arbitrarily and can be networked through multi-hop relays to expand coverage.

The private network is dedicated, and there are no link fees or traffic fees for the wireless transmission link.

Supports hierarchical grouping and roaming networking to expand the system communication capacity.

It has frequency hopping function, which effectively improves the anti-interference and anti-tracking capabilities; it introduces digital filtering function, which effectively suppresses far-end interference. At the same time, it adopts ARQ transmission mechanism to reduce data transmission loss rate and improve data transmission reliability.

Data transparent transmission supports non-differentiated transparent transmission of various business data. It has broadband transmission capabilities and can support multimedia services such as clear voice, broadband data and high-definition video.

The image has the ability to adaptively adjust, fully ensuring the continuity and smoothness of data, video and other services.

Adopts COFDM technology, with strong anti-multipath capability.

Dual antennas are used, antenna 1 and antenna 2 support TDD dual-transmission and dual-reception, and can transmit/receive diversity.

The wireless Mesh ad hoc network system can meet a variety of complex communication needs such as security patrols for large-scale events, urban anti-terrorism and stability maintenance command, emergency rescue command and dispatch, fire emergency communication command, and ship formation shore-sea communication. It is widely used in police, fire, electricity, petroleum, water conservancy, forestry, radio and television, medical, water and air communications and other departments and fields.

Centerless, same-frequency self-organizing network

The Mesh wireless ad hoc network system is a centerless same-frequency system. All nodes are equal in status. A single frequency point supports TDD two-way communication, simple frequency management, and high spectrum utilization. Any node device can be used as an end node, relay node, or command node in the network. A wireless communication network can be quickly established at any time and any place without relying on any other fixed communication network facilities (such as optical fiber, copper cable, etc.). All centerless same-frequency ad hoc network devices, including outdoor fixed stations, vehicle-mounted stations, and single-soldier portable stations, can automatically form a wireless mesh network and communicate with each other in real time by simply turning on the power.

High reliability

The wireless Mesh self-organizing network mobile base station adopts the military standard design: it is easy to carry, durable, waterproof and dustproof, suitable for various harsh environments, and can be quickly deployed to meet the communication needs of the emergency site. If a certain AP uplink fails in the traditional WLAN network, all clients on the AP will not be able to access the WLAN network. Wireless Mesh has the characteristics of self-organizing and self-healing, so the AP nodes in the Mesh network usually have multiple available links, which can effectively avoid single point failures.

High mobility

The location of an emergency event is highly uncertain, and the event site is constantly changing. Therefore, it is necessary to set up a temporary portable base station on site according to the occurrence of the emergency event. The portable base station on site is temporary, it is established when the scene appears and is withdrawn when the event ends.

Rapid deployment

In the face of emergencies, how to grasp the real-time dynamic information of the incident scene in a timely, accurate, fast and in-depth manner is crucial for commanders at all levels to make correct judgments and make combat decisions. Wireless Mesh self-organizing high-performance portable base stations use single-frequency networking to simplify on-site configuration and deployment difficulties to the greatest extent, meeting the requirements of front-line combat personnel for rapid network construction and zero configuration under emergency conditions.

Non-line-of-sight (NLOS)

Mesh self-organizing network technology can easily realize NLOS configuration, and its automatic relay feature can easily realize beyond-line-of-sight transmission. The signal can automatically select the best path to continuously jump from one node to another, and finally reach the target node without direct line of sight. It is a key technology to solve the “last mile” problem in various fields.

High data bandwidth for fast movement

The peak data bandwidth of the Mesh wireless ad hoc network system is 28Mbps. The nodes have non-fixed mobile transmission capabilities, and fast movement does not affect high data bandwidth services, such as voice, data and video services will not be restricted by the rapid changes in the system topology and the high-speed movement of the terminal.

Security and confidentiality

The system also has multiple encryption methods such as group encryption (working frequency, carrier bandwidth, communication distance, networking mode, MESHID, etc.), channel encryption and source encryption. It is dedicated to the network and can effectively prevent the intrusion of illegal devices and the interception and cracking of transmitted information, ensuring the high security of the network and information.