The rise of the Internet of Things has opened a big window for short-range wireless communication technology. Various short-range wireless communication technologies have been booming and have spawned a new concept - Personal Area Network (PAN).
The core idea of ​​personal area network is to replace the wired cable with radio or infrared, to realize the intelligent interconnection of personal information terminals and to form a personalized information network. At present, the application of Bluetooth mainly focuses on wireless headsets, car hands-free phones, wireless connections between personal computers and mouse and keyboard, etc. At the same time, the application of Bluetooth in personal area network (PAN) is gradually manifested. Bluetooth technology has broad application prospects in personal area networks, and the development of its technology has greatly promoted the development of PAN technology.
Infrared technology has begun to be applied in personal area networks, but infrared technology has a short transmission distance and poor anti-interference, which is not conducive to the development of personal area networks. Bluetooth technology solves such problems accordingly. First, the wireless transmission of Bluetooth is very low, and it is basically harmless to the human body. Its output power is 1Mw, which is only one millionth of the microwave oven. Secondly, Bluetooth is low in cost and small in size, and is easily accepted by the public. Finally, Bluetooth is interoperable, and different products can be interconnected to deliver voice and data.
Since the Internet has become the de facto interconnection standard, it is necessary for the wireless network to communicate using the same TCP/IP protocol as the current Internet. Bluetooth's BNEP (Bluetooth Network EncapsulaTIon Protocol) protocol provides seamless switching between Bluetooth packets and Ethernet packets, so using Bluetooth to implement wireless networks instead of wired networks is the preferred solution for implementing personal area networks.
In addition, Bluetooth technology has greatly promoted the development of personal area networks. Bluetooth technology is a short-range wireless communication technology that supports point-to-point and point-to-multipoint voice and data services. It is designed to form a kind of miniaturized, low-cost and low-power wireless communication technology. The network around the individual enables all kinds of informatized mobile or fixed devices within its coverage to achieve “seamless†resource sharing. The essence of the network is to establish a common radio air interface and its open standards for control software. The combination of communication and computer enables devices manufactured by different manufacturers to have interoperable and interoperable performance in a short range without wires interconnection.
Bluetooth has fast frequency hopping, low power consumption, high flexibility, easy to penetrate obstacles, and realizes all-round data transmission. Therefore, it has advantages in mobile device interconnection, especially suitable for a wide range of activities, requirements and more. Devices are rapidly interconnected, such as laptops, digital cordless phones, personal digital assistants (PDAs), cell phones, and more.
The application of Bluetooth technology in wireless personal area networks will mainly focus on small-scale environments such as homes and offices, generally not exceeding 10m. At present, the most promising market is to run the company's wireless personal area network. In the home LAN, it is necessary for home appliance manufacturers to carry out technological transformation in this respect, and it is possible to have a big breakthrough. Of course, many electrical companies are already developing such products.
It is believed that in the future, Bluetooth will break out in the dispute of personal area network technology, bringing the most reliable information exchange channel for short-distance Internet of Things.
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