Introduction to MESH
Mesh wireless ad hoc network system is a mobile broadband multimedia communication system designed with a new concept of "wireless grid network". Under the condition of non-line-of-sight and fast moving, all nodes of the system can realize real-time interaction of multi-media information such as voice, data, image and so on by using the distributed network architecture of non-central ad hoc network. At the same time, the system supports any network topology structure, and each node device can move randomly and quickly. The system topology can be updated quickly without affecting the transmission of the system. The overall system is easy to deploy, flexible to use, simple to operate and easy to maintain.
II. System Advantages
III. Application Areas
The wireless Mesh ad hoc network system can meet the security patrol of large-scale activities, the command of city anti-terrorism and stability maintenance, the command and dispatch of rescue and rescue, the command of fire emergency communication, and the interworking of naval fleet and sea. It is widely used in police force, fire fighting, electric power, oil, water conservancy, forestry, radio and television, medical treatment, water and air. Communications and other sectors.
IV. System Characteristics
Centerless co-frequency ad hoc networks
Mesh wireless ad hoc network system is a co-frequency system without center. All nodes are equal in status. A single frequency point supports bidirectional TDD communication. It has simple frequency management and high spectrum utilization. Any node device can be used as terminal node, relay node or command node in the network. The wireless communication network can be established quickly at any time and anywhere without any other fixed communication network facilities (such as optical fibers, copper cables, etc.). All non-central co-frequency self-organizing network devices, including outdoor fixed platform, vehicle-mounted platform and single-soldier portable platform, can automatically form a wireless mesh network by switching on power and communicating with each other in real time.
High reliability
Mobile base stations in wireless Mesh ad hoc networks are designed according to military standards. They are portable, durable, waterproof and dustproof. They can be deployed quickly to meet the communication needs of emergency sites in various harsh environments. If an AP upstream link fails in a traditional WLAN network, all clients on the AP will not be able to access the WLAN network. Wireless Mesh has the characteristics of ad hoc network and self-repairing, so AP nodes in Mesh network usually have multiple available links, which can effectively avoid single point of failure.
Strong mobility
The location of the emergency is very uncertain, and the scene of the incident is changeable. Therefore, according to the occurrence of the emergency, it is necessary to set up the temporary portable base station on the spot according to the local conditions. The portable base station on site is temporary. It is established with the appearance of the site and withdrawn with the end of the incident.
Rapid deployment
In the face of emergencies, how to grasp timely, accurate, fast and in-depth real-time dynamic information on the scene of the incident plays a vital role in whether commanders at all levels can make correct judgments and make operational decisions. Wireless Mesh Ad Hoc Network (WMANET) is a high-performance portable base station, which uses single-frequency networking to simplify the field configuration and deployment difficulty to the greatest extent, and to meet the requirements of first-line fighters for rapid networking and zero configuration under emergency conditions.
Non-line-of-sight transmission (NLOS)
Using Mesh ad hoc network technology, NLOS configuration can be easily realized. Its automatic relay characteristics can easily achieve over-the-horizon transmission. Signals can automatically select the best path from one node to another, and finally reach the target node without direct horizon. The key technology to solve the "last kilometer" problem in various fields.
High Data Bandwidth Fast Moving
The peak data bandwidth of Mesh wireless ad hoc network system is 28Mbps. Nodes have the ability of non-fixed mobile transmission, and fast mobility does not affect high data bandwidth services, such as voice, data and video services will not be affected by the rapid changes in the system topology and the constraints of high-speed terminal movement.
Security and confidentiality
At the same time, the system has many encryption modes, such as marshalling encryption (working frequency, carrier bandwidth, communication distance, networking mode, MESHID etc.), channel encryption and source encryption. The special network can effectively prevent illegal equipment intrusion and the transmission of information intercepted and cracked to ensure high security of network and information.
Introduction of System Composition
MESH Base Station BF-MR910B/BF-MR920B
MESH base stations are mainly deployed at fixed points. The equipment has high transmitting power and long coverage distance. It is especially suitable for application scenarios such as long-distance coverage, information convergence and return, area coverage support, heights enhancement coverage and relay transmission nodes.
technical parameter
MESH Portable Platform BF-MR902P/BF-MR910P
MESH portable platform can be deployed quickly, has good mobility, and is convenient for mobile networking. It can be mainly deployed on motor vehicles, ships and backpacks to achieve real-time remote collaboration between the front-end mission site and the rear command center. At the same time, it can be mounted on the BF-TR925 series portable relay station, and as the data link of the BF-TR925 series portable relay station, it can be connected to the backbone of emergency communication system. It is especially suitable for many application scenarios, such as field front-end command, regional emergency communication, fleet/fleet self-organized communication, security patrol, mobile monitoring and mobile relay transmission.
technical parameter
MESH Handset BF-MR901H
MESH handset is compact and portable. As the wireless expansion and extension of base station or portable station node, it can easily go deep into the scene of emergency or crowds, and real-time return multimedia information such as high-definition video, so that commanders can control the scene situation in real time and intuitively. The equipment is suitable for many application scenarios, such as local collaboration/advance work of small teams, interconnection of high-rise or underground areas within buildings, dense crowds and covert work needs.
technical parameter
MESH Modular BF-MR902M
MESH communication module, which can be mounted on BF-TR925 series portable relay stations, can be used as wireless extension and extension of fixed stations or vehicular nodes. It can easily go deep into the scene of emergencies or crowds, and real-time return multimedia information such as high-definition video, so that commanders can control the scene situation in real time and intuitively. At the same time, as the data link of BF-TR925 series portable relay station, it is connected to the backbone network of emergency communication system.
technical parameter
MESH Vacant BF-MR925mS
MESH airborne module is compact in size, light in weight, low in power, long in battery life, and carries unmanned aerial vehicle. As MESH high-altitude node, ultra-long distance relay can be achieved with less power to overcome the influence of terrain, buildings and other ground networking. By combining with supporting equipment, the functions of aerial video transmission, Flyer Distribution and material delivery can be realized.
technical parameter
6. Networking Case
Chain netting, quantity netting and network netting
Hybrid networking