Whether you admit it or not, as long as you are online, you may not be able to leave WiFi. Yes, unconsciously, WiFi has almost captured the entire world.
In terms of space, WiFi is like an invisible net, which is scattered in people's intensive places. At home, on the road (vehicle), in office buildings, restaurants, playgrounds, cafes, libraries, etc., WiFi is the most widely covered signal; in terms of equipment, ABI Research found that as of the end of 2014 A total of 9.98 billion WiFi devices have been sold worldwide, and a total of approximately 4.5 billion WiFi products are currently in use. At the same time, Wi-Fi equipment is expected to continue to grow at an annual rate of 10% in the next five years.
But it is such a technology that people rely on and develop rapidly. It is hard to achieve absolute advantage in the smart home of the current fire. In many smart home wireless technologies, WiFi is still not the protagonist. In fact, among the more than 2.3 billion WiFi devices sold in 2014, mobile phones, tablets and e-readers accounted for nearly 70% of total shipments. Smart homes, industrial Internet of Things, and automobiles all belong to “other partsâ€. ".
Why? Why is the presence of WiFi in the smart home field that many people use is low?
The technology that can't be hit and hit is "hard". WiFi is not a big problem as a connection to the Internet, but at least three points are not enough for smart homes.
——1, it is a faint security. Here, not directly, how the security encryption technology of WiFi is vulnerable, and no longer mentions which foreign smart home equipment has been "destroyed". I just want everyone to think about it, without knowing the family WiFi traffic. If you are used by strangers for no reason, you can understand that WiFi is not a difficult thing to crack. And if the smart home is attacked, it may not be as simple as a little traffic.
——2, fuzzy health. Wireless technology will have some radiation, but compared to other technologies, WiFi is often the most threatening health suspicion, even if we use it often and most of the time without discomfort. So is it harmless? The World Health Organization has pointed out that there is currently no evidence that mobile phone radiation will have a negative impact. Generally speaking, for 20 minutes, the body absorbs more radiation than a one-year wireless router.
However, some insiders pointed out that if WiFi is used incorrectly, it will cause harm to the human body. The amount of radiation received by the human body is related to the frequency and distance. The higher the frequency, the greater the damage, the greater the distance, the less harmful. Therefore, if a large-power WiFi device is used, the device is close to the device, and the autoimmune power is low, it is possible to have physical discomfort such as dizziness and insomnia due to WiFi.
- 3, "Unbearable lightness of life." In general, smart homes are systems that involve multiple devices, while WiFi networks carry very limited devices. According to relevant reports, "WiFi networking capabilities are relatively low. Currently, the actual size of WiFi networks generally does not exceed 16 devices. In actual home environments, the number of switches, lighting, and home appliances is far more than 16." . This obviously does not fit in with the development of smart homes.
The promotion of popular cognition. WiFi has a natural networking advantage and does not require intermediate equipment, but for the public, this does not seem to have much of a special feature.
—— As far as this year is concerned, it should be regarded as a great opportunity for WiFi, and many Chinese companies have made a lot of efforts. In mid-January, Xiaomi launched a universal intelligent module for home appliances at the flagship new product launch conference, the price is 22 yuan; on March 11-14, AWE2015 (2015 China Home Appliances Expo), the WiFi module became the smart home experience zone. One highlight; in March, 360 launched the "360 Zhilian module", the price of 1 yuan, the first batch of 10,000. Note that these modules are all WiFi modules.
- It stands to reason that this very strong "module wind" should be able to help WiFi to win the smart home, but "and eggs." Although the voice of the manufacturers is very loud, and the market is very busy, but the smart home has been greatly enhanced by the consumer's only weak words can make this wind stop: can be connected to the smart home through WiFi? How simple is the question, but how painful it is for WiFi!
Cruel external competition. In addition to WiFi, there are many other wireless technologies that are eyeing the smart home market, which is the third reason why WiFi is difficult to dominate. Among many smart home wireless technologies, Bluetooth, ZigBee and Thread are undoubtedly the biggest threats.
——Bluetooth is similar to WiFi, and has made a lot of changes for smart home. In December 2014, the Bluetooth SIG officially announced the release of the Bluetooth Core Specification version 4.2. The faster data transfer speed, more powerful privacy protection and support for the IPv6/6LoWPAN network made the new version "history." The most outstanding Bluetooth technology." Errett Kroeter, senior director of the Bluetooth Technology Alliance brand and developer market, said at a media conference at the time that the Bluetooth 4.2 release was to make Bluetooth Smart continue to connect everything in life – from personal sensors to smart The best solution for the family.
——ZigBee is a model that is “more powerful than you, and harder than youâ€. In smart home applications, ZigBee has advantages over WiFi: 2.4G direct-sequence spread spectrum and frequency modulation technology, which is more resistant to interference than general FSK, ASK and frequency hopping digital radio stations; provides three levels of security mode, including no security settings Using access control lists to prevent illegal access to data and symmetric passwords using the Advanced Encryption Standard (AES 128), security is more secure; in low-power standby mode, 2 No. 5 dry batteries can support 6 nodes working 6-24 Month, even longer.
In the expansion of the alliance's strength, it is more determined than WiFi, and the internal technology is perfected. The team of external members is expanded: In December 2014, the ZigBee Alliance announced that it will unify its market-leading wireless standard into ZigBee 3.0, and strive to achieve internal technical unification; this year 3 In the month, it officially announced that China's Internet of Things leader IOT has joined the board of directors of the alliance, becoming the 12th board member of the alliance and the only board member in Asia. Recently, Samsung's brand SmartThings has been included in the 13th board of directors in the world.
—— Thread as a rising star, can also make WiFi nervous. Although Thread appeared late, it was named after the door. In July 2014, it was proposed by Google's home thermostat manufacturer Nest, and then it was called a response. Samsung, ARM, Core, Freescale, Qualcomm and other world famous enterprises joined. Currently, the Thread Group has grown. In terms of the number of members, there were only 7 at present, and now there are more than 160. In terms of membership quality, founding members Freescale and Core are members of the ZigBee Alliance Board of Directors. Qualcomm, which is newly added to the Thread Group Board of Directors, is an important founder of the AllSeen Alliance. member.
Of course, even if there is such a problem, even if it is difficult to dominate the smart home field, WiFi is still an important communication technology in the smart home field, so it is not an opportunity to continue to improve and improve.
At the WiFi Alliance Symposium held in Beijing in January this year, Ms. Kelly Davis-Felner, Vice President of WiFi Alliance Marketing, released 15 predictions for the new year on behalf of the WiFi Alliance, arguing that the performance of WiFi technology will be further improved. Ensuring interoperability and security while increasing energy efficiency, coverage and performance, and leading the smart home, industrial IoT and car networking.
"Connecting everything, connecting everyone, anytime, anywhere" is the vision of the WiFi Alliance. However, nowadays, there is a long way to go.
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