Shenzhen Suntor Technology Co., Ltd.

Mesh wireless ad hoc network equipment is a temporary multi-hop autonomous system composed of a group of movable nodes with wireless transceivers. It does not rely on preset infrastructure and has the characteristics of temporary networking, rapid deployment, and wireless Control center, strong invulnerability and other characteristics. It has broad application prospects in both military and civilian applications. It is an important equipment in the field of modern wireless communications.     In practical applications, Mesh wireless ad hoc network equipment can achieve the following functions:   1. Voice communication The VOIP call equipment of each team member and the wireless ad hoc network node are connected through the Ethernet port or WIFI wirelessly, and are realized through this system with the audio and video dispatching platform of the command vehicle and the off-vehicle commander. Real-time two-way interconnection. The command vehicle and the off-vehicle commander can make individual calls, group calls, group calls and other voice calls to single or multiple action team members at any time through the audio and video dispatch platform or handheld command terminals, realizing the communication between individual team members, off-vehicle commanders and Real-time two-way voice communication between operational team members.     2. Video command The collection equipment carried by each front-end action team member is connected to the wireless self-organizing network node through the Ethernet port or WIFI wireless method, and through this system, it communicates with the audio and video dispatching platform of the command vehicle and the off-vehicle commander. Real-time two-way interconnection between them. The command vehicle and off-vehicle commanders can access the video images returned by one or more action team members at any time through the audio and video dispatch platform or handheld command terminal for real-time command decision-making. Each wireless ad hoc network system can achieve a transmission rate of up to 8.9Mbps and can support real-time transmission of up to 8 channels of images at the same time.     3. The system is stable and does not drop out. Each mash wireless self-organizing network device of Tengyuan Zhituo supports point-to-point, point-to-multipoint, and mesh network architecture. The total number of nodes is no less than 42 and can maintain links with multiple devices at the same time. . In addition, Mesh wireless self-organizing network equipment also has non-line-of-sight diffraction transmission capabilities and self-healing functions. Each node of Mesh wireless self-organizing equipment has one or several paths for transmitting data. If the nearest node fails or is interfered with, data transmission packets will automatically choose an alternate path to continue transmission, and the operation of the entire network will not be affected. Therefore, the stability of the entire equipment system is very stable.

Due to the increasing maturity of wireless transmission technology, it has been widely used in many fields. The application of wireless transmission systems has effectively improved the efficiency and safety of some outdoor operations. Today we will learn about the important applications of wireless transmission in coal mining.     Due to the deep underground and complex environment, underground coal mine operations have a high rate of safety accidents. When encountering an emergency, traditional communication methods cannot transmit various information in a timely and effective manner. The multi-hop ad hoc network system adopts the Mesh ad hoc network mode, which has excellent performance such as automatic networking, automatic network healing, and decentralized network topology. It is very suitable for building a stable network in the complex environment of coal mining and providing wireless broadband access signals.      Introduction to design plan In the underground tunnel, a multi-hop self-organizing network relay base station equipment is placed at intervals, and adjacent base stations can be directly interconnected to form a network. Based on the total length of a mine tunnel of 10 kilometers, only about 30 multi-hop ad-hoc network relay base stations need to be deployed to achieve full coverage of wireless broadband network signals in the entire underground working area.     The underground wireless broadband system composed of a multi-hop ad hoc network system has a large business capacity and can support more than 300 terminals to access the network at the same time. When underground personnel work, they carry handheld smart terminals with them, which can automatically connect to nearby multi-hop self-organizing network relay base stations, and then connect to the ground dispatching and command center through multi-hop relay links. Ground dispatch commanders and underground workers can exchange various data information, audio and video information, etc. in real time.     Multi-hop ad hoc network systems have strong self-healing capabilities. If any multi-hop ad-hoc network relay base station equipment is damaged or accidentally leaves the original network, the remaining relay base stations will automatically reorganize the network. That is to say, if any device in the group goes offline, the corresponding device will continue to communicate within the effective antenna coverage, ensuring that the network does not go offline. In practical applications, we can adopt a ring network design without worrying about ring network congestion.     Suntor Mesh self-organizing network equipment can adopt a variety of communication combination methods and be applied to different usage scenarios. It can be installed at fixed points or in places such as moving vehicles, ships, personnel, robots, drones, unmanned ships, etc. for rapid wireless deployment. The product software module integrates base station communication, client communication, point-to-point communication, and its own MESH self-organizing network communication function and automatic roaming function that are different from other mesh products on the market. Through the application of this system, in the coal mining process, it will help improve coal mine production efficiency, improve safety production conditions, and provide important technical support for coal mine safety production and dispatching communications.

With the increasing frequency of human maritime activities, the role of maritime emergency communication support in marine activities has become increasingly apparent, and the construction of its system has become the focus of attention of countries at home and abroad. The maritime environment is vast and changeable, and the security situation is complex. Various marine natural disasters and maritime emergencies bring serious harm to marine activities. Therefore, in order to ensure the safety of natural disasters and emergencies at sea. It is imperative to establish a complete maritime emergency communication system.     Due to the harsh natural environment of the ocean, the maritime emergency communication system must meet basic support requirements such as comprehensive coverage, key reinforcement, emergency dispatch, and rapid response. Different from land emergency communication support, maritime emergency communication support usually needs to face unfavorable conditions such as lack of basic communication facilities at sea and harsh offshore working conditions. Moreover, maritime emergencies usually have the characteristics of sudden incident, short emergency response window, and serious consequences. Therefore, the requirements for maritime emergency communication support are relatively high.         Restricted by the maritime natural environment, maritime communications are basically dominated by wireless communications. The diversity of maritime environments and maritime emergency scenarios determines that maritime emergency communications must include a variety of wireless communication methods. At present, maritime emergency communication systems mainly include maritime wireless communications, marine satellite communications and shore-based mobile communications, which together form a communications network that basically achieves full coverage of the ocean. The system can ensure daily ship-to-coast and ship-to-ship communications in offshore, distant seas and distant oceans; it provides relatively reliable, Accurate, timely and secure communications infrastructure.     The powerful Mesh wireless self-organizing network equipment is the core equipment of today's maritime emergency communication system. Maritime wireless emergency communications constructed from Mesh wireless ad hoc network equipment have the following advantages:     Centerless and fast networking: After the device is turned on, it will quickly search and discover other nearby devices. There is no need to perform network planning and configuration in advance, and the network will be automatically established. When other nodes are added to the existing network, the new equipment will be integrated with the original network into a larger network through direct connection or jump, so that the normal work of the entire network does not depend on any node.     Reliable network transmission: The frequency can be flexibly configured, so that the device can still ensure normal communication work and data services when facing a changeable, complex, and flexible environment. In actual use, if a node suffers an accident and causes service interruption, the network will reselect a link to continue transmitting data to ensure the normal operation of the service.     Easy to expand: New wireless autonomous network equipment can be directly connected to the original network; if a node is outside the network coverage, other nodes can also be used as relay points to allow the node to access the network.     Suntor has 13 years of application experience in the wireless transmission industry, and has jointly developed products with a master's and doctoral team from Northwestern Polytechnical University. It has more than ten national invention patents in long-distance high-speed wireless transmission. Solutions can be formulated and provided based on the customer's wireless transmission environment, distance and bandwidth requirements. The company's marine transmission series products composed of Mesh wireless self-organizing network equipment adopt exclusive channel adaptive transmission technology to support mutual communication between offshore fixed platforms, large mobile platforms, and small mobile platforms. Users can mix and match according to their needs. The system adopts a modular design and parameters can be customized according to needs. It can be compatible with satellite communication networks, mobile phone networks, and the Internet to achieve complementary advantages.   Maritime emergency communication systems cannot be widely used in offshore oil platforms, fishing boats, merchant ships, official ships, cruise ships, ferries, maritime surveillance ships, coast guard ships, scientific research ships, unmanned ships, unmanned boats, buoys, islands and reefs, and land shores. Meet the application requirements for point-to-point high-speed communication between ocean-sized and large platforms, and realize a high-speed short-range communication system for ocean point-to-point platforms. Supports data, voice, video, and image network transmission. For more knowledge about maritime emergency communication systems, you can visit the Suntor website, where we will have more solution descriptions.

COFDM is a very advanced technology in the field of wireless transmission. Its main function is to rapidly and stably transmit high-definition audio and video signals in a blocked mobile environment. Its biggest advantage is that it supports the application of breaking through the limit of visual distance. Therefore, it is widely used in the field of modern wireless transmission. But while COFDM is so powerful, there are a number of factors that affect the practical application of COFDM, which we will look at below. 1、Antenna gain   In the application of COFDM mobile wireless video transmission equipment, when the transmitter adopts high-gain directional antenna, the power density (field intensity) in the communication direction can be significantly improved; when the receiver adopts high-gain directional antenna, the signal/noise ratio can be significantly improved, and the receiving field intensity can be increased, thus greatly improving the communication distance.     2、Obstruction   COFDM mobile wireless video transmission equipment has the ability of diffraction, but the diffraction will cause the weakening of the transmission signal, so when the blockage is more dense, the transmission distance of the equipment will be closer.     3、Equipment power   Generally speaking, under certain transmission environment and conditions, the larger the power of COFDM mobile wireless video transmission equipment, the longer the transmission distance.     4、Same frequency electromagnetic signal interference   Although COFDM mobile wireless video transmission equipment has a very strong anti-interference ability, its transmission distance will be affected by the signal interference of the same frequency.     5、Altitude   Due to the radian of the earth, there will be a certain drop between the transmitting end and the receiving end of the equipment as the distance increases. Therefore, in the long-distance transmission process to adjust the corresponding position according to the altitude.