I. Wireless Communication Technology
Currently, wireless communication and its applications have become one of the most active research areas in information science and technology. Wireless communication is a communication method that utilizes the property that electromagnetic wave signals can propagate in free space to exchange information.
In wireless communication, radio propagation refers to the behavior of a radio waveform traveling from the transmitter to the receiver. Currently popular wireless communication technologies include: RFID, GPRS, Bluetooth, WiFi, Infrared (IR), UWB, Zig-Bee, and DT fully digital wireless encrypted communication.
Wireless communication refers to long-distance transmission communication between multiple nodes without transmission through conductors or cables. Wireless communication can be carried out using radios, wireless devices, etc.
Wireless communication encompasses a wide range of fixed, mobile, and portable applications, such as two-way radios, mobile phones, personal digital assistants (PDAs), and wireless networks. Other examples of wireless communication include GPS, garage door openers, and wireless mice.
Most wireless communication technologies use radio waves, including Wi-Fi with a range of only a few meters, and deep-space networks that communicate with Voyager 1 over distances of millions of kilometers. However, some wireless communication technologies do not use radio waves, but instead use other electromagnetic wave technologies, such as light, magnetic fields, and electric fields.
Products utilizing DT's fully digital wireless encrypted communication include industrial wireless communication terminals, PLC wireless communication terminals, wireless switch transmitters, wireless analog transmitters, and industrial-grade long-distance wireless transmission devices. These products are characterized by reliability, simplicity, and high efficiency, and are widely used in industrial applications. They are primarily used in conjunction with PLCs, DCS systems, frequency converters, and intelligent instruments in industrial environments, mainly in steel mills, coking plants, mines, chemical plants, wastewater treatment plants, weather stations, thermal power plants, waterworks, boiler plants, oil refineries, cement plants, building materials factories, paper products factories, plastic products factories, and automobile factories.
II. Specific Applications of Wireless Communication Technology
1. Mobile phone
Mobile phones are arguably one of the most well-known applications of wireless communication, with over 4.6 billion phones worldwide by the end of 2010. Mobile phones use radio waves to allow users in different locations to communicate with each other. Users can use their phones within the range of mobile communication base stations, which transmit and receive signals from the phones.
2. Wireless data transmission
Wireless data transmission is an essential part of mobile computing. Many technologies are available, differing in regional availability, coverage, and performance. In some cases, users must be able to deploy multiple connection methods and switch between different modes. To simplify the user experience, connection management software or MVPN can be used to manage multiple connections as a single, secure virtual network. The following are some wireless communication methods used for wireless data transmission:
Wi-Fi is a wireless local area network that allows portable computing devices to easily connect to the internet. Using standards such as IEEE 802.11a, b, g, and n, Wi-Fi speeds approach those of some wired networks. Wi-Fi has become the de facto standard for hotspots in homes, offices, and public spaces. Some businesses charge a monthly fee for Wi-Fi, while others provide it for free because it can boost their product sales.
Cellular networks can be used as long as the nearest base station is within 10 to 15 kilometers. Their speed has improved with the evolution of technology, from early GSM, CDMA and GPRS to 3G networks such as W-CDMA, GSM Enhanced Data Rate Evolution (EDGE) or CDMA2000.
Mobile satellite communications: These can be used in situations where other wireless technologies are unavailable, such as vast rural areas or remote locations. Communication satellites are particularly important in transportation, aviation, maritime, and military applications.
Wireless sensor networks can directly detect relevant physical quantities, monitor and collect data, generate meaningful displays for human viewing, and provide some decision-making functions.
3. Wireless power supply
Wireless power delivery refers to transferring electrical energy from a power source to another device that does not have a built-in power source, without the need for a wired connection. There are two basic methods of wireless power delivery: using light beams/lasers, radio waves, or microwaves, or using near-field induction. All of these methods utilize electromagnetic waves and magnetic fields.
4. Wireless medical technology
New technologies such as mobile body area networks (MBAN) can use wireless technology to monitor blood pressure, heart rate, oxygen saturation, and body temperature. MBAN sends low-power wireless signals to a receiver, which then transmits the data to monitoring equipment or nursing stations. This technology reduces the risk of intentional or unintentional infection, or problems caused by broken wired connections.
5. Computer interface device
The earliest keyboards, mice, and other devices were wired. Later, wireless interface devices gradually appeared, mostly using Bluetooth technology. Their response time may be slightly slower than that of wired devices, but the difference between the two is getting smaller and smaller.
