In the field of short-range wireless communication, Bluetooth and Wi-Fi are a pair of enemies.
Their first confrontation appeared in 2009. In that year, the Bluetooth Technology Alliance released the 3.0 technical specification. The new technology introduced WLAN, and the transmission speed became 8 times the original, which enabled Bluetooth to achieve high-speed transmission.
But WLAN is the area where Wi-Fi is focused. Bluetooth intrusion into this area is tantamount to moving Wi-Fi cheese. I do not know whether it is intentional or unintentional, half a year later, the Wi-Fi Alliance announced that it will launch a new standard Wi-FiDirect, so that Wi-Fi devices can connect to each other without accessing traditional home, office or hotspot networks. This means that Wi-Fi can also realize the function of direct connection between Bluetooth devices. There was a lot of public opinion for a while, and there were many opinions that Wi-FiDirect technology meant the end of Bluetooth technology.
But the Bluetooth Technology Alliance quickly responded, saying that Bluetooth 3.0 technology has more advantages and is more convenient to use. And in 2010 announced the launch of Bluetooth 4.0, which is only one year away from the release of Bluetooth 3.0, such a rapid iteration of Bluetooth version is rare in the past.
As of 2012, Bluetooth technology has not seen its decline, and Wi-FiDirect has not yet become the standard of consumer electronics products. Even in the understanding of ordinary consumers, Wi-FiDirect is still a very jerky term. The confrontation between the two will continue, and whoever wins will have to be decided by the consumer in the market. There is also a view that Bluetooth and Wi-FiDirect have their own strengths, not a substitute relationship, but coexistence and development.
Recently, Marriot Winquist, director of global membership development and relations of the Bluetooth Technology Alliance, positioned the relationship between Bluetooth and Wi-Fi in an interview with reporters: Bluetooth and Wi-Fi are not a direct competitive relationship, and there are some business areas where they overlap. Yes, but in most areas it is not overlapping.
Tan Wenyue said, for example, in the medical field, Wi-Fi has strong power consumption and power, requires frequent charging, and will also interfere with some medical equipment, so it is generally not suitable for the medical field. The most significant feature of Bluetooth 4.0 version is its low energy consumption. Under the support of Bluetooth 4.0 low power consumption, even if it is powered by a button battery, the use time can be as long as one year or even longer. In this respect, Wi-Fi and Bluetooth have no way to compare, so Bluetooth still has some new areas of its own application. Wi-Fi's 802.11ad actually has good security.
The Wi-Fi Alliance has announced the launch of the Miracast certification project in September this year. Miracast users can form a connection via Wi-FiDirect, browse photos taken on a smartphone on a large-screen TV, or share a laptop screen in real time through a meeting room projector without accessing any Wi-Fi network-Miracast certified devices have Connectivity. This brings the applications described in the Wi-FiDirect white paper closer and closer to reality, such as Miracast-certified wireless displays.
According to MIKELU, technical marketing manager of the Greater China Region of the Bluetooth Technology Alliance, Bluetooth and Wi-Fi are both differentiated and overlapped, and both have places to learn from each other. In terms of positioning, Bluetooth technology is positioned as a personal area network (PAN), and Wi-Fi is a technology between WAN (wide area network) and PAN. In the overlapping areas, because Bluetooth transmission technology has become the standard configuration of mobile phones, users can easily pair with other devices, and Wi-Fi and adjacent frequency band networks such as long-range long-distance plan (LTE) are prone to interference, while Bluetooth technology has Frequency hopping technology can maintain the stability and confidentiality of the signal.
According to ABI, a senior market research organization, in 2012 alone, 2 billion products with Bluetooth capabilities entered the market globally.
At present, the most well-known application of Bluetooth is the Bluetooth headset, but according to the introduction of Bluetooth to Sina Technology, it has a broader application space. Mobile phones, automobiles, medical care, consumer electronics, sports and fitness have formed the five major ecosystems of Bluetooth. .
In fact, Bluetooth 4.0 is a specification synthesized by three Bluetooth specifications, namely traditional Bluetooth, Bluetooth low energy and high-speed Bluetooth technology, which can be combined or used separately. Compared with Wi-Fi, Bluetooth 4.0's most notable feature is low energy consumption, which has become an important point for Bluetooth to compete with Wi-Fi. Low energy consumption is also what IoT devices rely on. A feature may determine the strategic direction of Bluetooth in the future.
Stephen, a newly appointed board member of the Bluetooth SIG this month. Dr. Gray (StevenGray) pointed out, "The most critical thing is that in the development of the Internet of Things, nearly 50 to 100 billion devices are all using low-energy wireless connection technology. Since its establishment, Bluetooth technology alliance member companies' Bluetooth devices The total shipments have reached nearly 10 billion pieces, which are far more than any wireless technology that provides low-power radio frequency, and this is also a natural choice for the market, which is conducive to promoting the possibility of interconnection. In essence, Bluetooth low energy consumption Wireless technology will be the first choice for IoT applications in the future. "
The data shows that as of now, there are more than 7 billion Bluetooth devices on the market, and this number is expected to reach 9 billion by the end of 2012. For Wi-Fi, it is estimated that the sales of Wi-Fi Direct-enabled devices reached 173 million in 2011.
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