標(biāo)題: the development history of smart home [打印本頁] 作者: hia 時間: 2023-2-6 11:38 標(biāo)題: the development history of smart home When it comes to the development history of smart home, we have to mention ZigBee technology. ZigBee is based on the IEEE802.15.4 standard, using the frequency band 800Mhz / 900Mhz / 2.4G. Because of its low cost and its unique characteristics of jump transmission, it is widely popular among industrial control equipment manufacturers. Since its publication in 2001, it has been widely used in the field of object connection and wireless communication due to its advantages such as low power consumption and long transmission distance. We can believe that the birth of ZigBee technology is the germination of the Internet of Things. ZigBee has been widely used in the field of industrial control since the beginning of the birth of this technology. People have begun to realize that the simple wired connection of characters can no longer meet our actual needs. We need more wireless connection of ground objects and character interaction in the actual application scenes. We can consider this as the meta era of the Internet of Things.
In 2013, Qualcomm launched the industry's first WIFI low-power SOC, which completely broke people's understanding of the Internet of Things. WIFI is based on 802.11 protocol and works in 2.4G / 5G frequency band. Because of its wide area network access capability, people have a bright view of the Internet of Things technology. With the help of the concept of Internet, cloud and intelligent terminal, people can connect everything more conveniently. The author thinks that this is the era of Internet of Things 1.0, the significance brought by WIFI connection is not only the change of connection mode, but also the change of thinking mode. Connection becomes a physical communication mode, and the Internet becomes the spiritual support.
In the past few years, the Internet of Things has been from germination to hesitation, and now it is widely recognized. The WIFI connection of the Internet of Things plays a connecting role, bringing hope to the device manufacturers. We are excited to meet this change, but with the in-depth exploration of this direction, there is a problem that the manufacturers have to face again, how to solve the power problem, Indeed, Qualcomm has specially optimized the power consumption of this SOC for the Internet of Things market. However, due to the characteristics of WIFI, power consumption does not have many advantages in traditional low-consumption technologies, such as Zigbee and Bluetooth, so people begin to re-examine low-power physical connection
The way of connection and advantages and disadvantages of ZigBee have been introduced in the beginning, about Bluetooth, in fact, is a technology earlier than ZigBee, based on IEEE 802.15.1 protocol, transmission channel is 2.4-2.485 GHz, Bluetooth from the birth has been widely used in wireless communication technology, such as Bluetooth headset, With the development of intelligent wearable technology in the past two years, Bluetooth has been added with new vitality. Before the concept of the Internet of Things was widely accepted, Bluetooth has been a good friend of WIFI. As a technical derivative of WIFI, Bluetooth has played a great role. For example, in our mobile laptops or high-end standard models of smart phones, Bluetooth and WIFI have always existed in the devices. In the past two years, AI audio has been widely launched in the market, giving people a new way to interact with the Internet of Things, and Bluetooth has been endowed with new vitality.
ZigBee, WIFI and Bluetooth technologies in the application of the Internet of Things are introduced above. With the increasingly extensive demand for the connection of the Internet of Things, various fields of the Internet of Things are booming, such as the in-depth development of smart home, smart wear, smart car and other markets, and people are increasingly in urgent need of the integration of these three technologies. Although these three technologies are all three communication methods of the Internet of Things, the occasions they are used in do not completely overlap. ZigBee is widely used in sensor and other markets, and WIFI is used in
Non-power strict requirements and other household appliances and gateways, Bluetooth is used in smart wear and AI audio field, these three technologies play a complementary role in the actual field of the Internet of things, so from the application scene, these three technologies are mutually complementary, then for the Internet of Things gateway equipment business problem, since there is the necessity of existence and integration, Is it technically possible to do it at the same time? Yes, but there are challenges.
As has been introduced above, three communication modes will work in the same frequency band at the same time. We all know that wireless communication will interfere with each other in the same frequency band. In fact, this problem also exists in the integration of these three technologies. Because of the technical retransmission mechanism, Bluetooth and ZigBee have small data volume, so in some application fields, we simply superimpose the concept of fusion, relying on the working characteristics of retransmission of a minimal amount of data, without restrictions on the three technologies to achieve communication through competition.
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