In recent years, the iterative development of mobile Internet has continuously driven the surge and upgrading of home network devices. In addition to traditional Internet devices such as mobile phones, iPads and computers, with the dream of smart home becoming more and more reality, more and more traditional household appliances such as TVs, refrigerators and air conditioners have also been connected to the Internet. Home network has become an important foundation for Smart Life in the future. How to build a simple, stable, reliable and high-speed home network system has become a topic of concern. This article will reveal how to improve the performance of home WiFi and enjoy the “Smart Life” at home.

Wireless local ecology makes home smarter

In the home network environment, the wired network has the characteristics of high transmission quality and good stability, but the deployment requires physical equipment such as network cable and network card. The high cost of network wiring also affects the beauty of the home. In addition, it can not be moved, and there are fewer and fewer use scenarios. Wireless WiFi uses the characteristics of electromagnetic wave for information transmission. With flexible deployment, efficient transmission and mobile terminal, it has become an indispensable part of family life. Therefore, China’s radio management department has successively planned 2.4GHz ~ 2.4835ghz, 5.745ghz ~ 5.85ghz and 5.15ghz ~ 5.35ghz and other license free frequency bands for WLAN, which fully ensures the use demand of high-speed and large bandwidth of home wireless network.

Statistics show that the average number of devices connected to WiFi network through wireless router in each family in China reaches 6, including TV, mobile phone, iPad and other smart home devices. With the popularity of WiFi technology, more than 80% of users use WiFi network to surf the Internet and use applications such as HD video playback.

Home WiFi signal geometry? A trick to teach you to test easily

While users enjoy the convenience brought by the wireless network, problems such as slow downloading speed of the wireless network, network dropping, jamming when playing HD video also occur from time to time, which seriously affects the user experience.

In view of the problems existing in the current home wireless network, the national radio monitoring center analyzes the indoor WiFi signal strength and interference, and comprehensively evaluates the field strength coverage performance of the wireless router through field testing. The typical scenario is a two bedroom and one living room apartment with an area of 90 m2. The wireless router is placed near the wall of the living room and enters the normal working mode according to the configuration of the user manual. During the test, 11 groups of sampling points such as living room, dining room, master bedroom, secondary bedroom, bathroom and balcony were selected for test.

Through the analysis of the sampled data, it can be seen that in the typical indoor wireless network environment, the WiFi signal is easily disturbed by the house structure and other wireless LAN signals, resulting in poor user experience in some areas. The main reasons are as follows.

First, the transmission performance is affected by the shelter of the housing wall. Doors and windows, walls, indoor articles and large furniture in the actual environment will have an adverse impact on the transmission of WiFi signals. When WiFi routers and wireless internet access devices belong to different rooms, the wireless signals need to pass through media with large transmission loss such as concrete and metal, and the signals become weak, resulting in the reduction of signal data transmission rate in some areas of the room, Affect the user experience.

Second, the external wireless signal interference affects the transmission performance. In the home environment, all kinds of mobile phones, home appliances and even neighbor routers using wireless technology will cause competition for spectrum resources, resulting in wireless network congestion and slow network speed. Through the test, it can be seen that the wireless signals in typical rooms are extremely complex. The wireless router signals of more than ten neighbors can be searched in the same area. Multiple router signals are superimposed, blocking some channels and seriously interfering with each other.

WiFi router performance improvement skills

When using a router in a home environment, you can try the following techniques to improve the transmission performance of WiFi signals.

First, reasonably select the placement position of wireless router. Firstly, the location that can cover the whole indoor environment shall be selected for placement, so as to minimize the signal attenuation caused by media barriers such as walls. Secondly, it should be placed in the room with many doors and windows, which can effectively reduce the difficulty of penetration. Finally, reasonably estimating the reflection effect and penetration of wireless router signals is also helpful to improve WiFi rate and enhance indoor signal coverage. According to the radio characteristics of different frequency bands, the penetration difficulty and attenuation degree of signals sent by wireless routers to different materials are also different. The medium penetration performance of WiFi signals is roughly as follows (from easy to difficult): air wood / glass brick wall / cement wall ceramic tile wall / reinforced cement wall metal plate.

The second is to reasonably configure the use frequency of wireless router. Wireless routers working in 2.4GHz or 5GHz band have different technical characteristics. When 2.4GHz wireless signal propagates in the air, the attenuation is small and the propagation distance is longer; 5GHz wireless signal suffers less interference and higher transmission rate, but the transmission distance is short. Therefore, for mobile phones, iPads and other devices that need to move frequently in each room, it is recommended to give priority to connecting to the 2.4GHz network to give full play to the advantages of wide coverage and ensure that mobile devices can surf the Internet normally in each room; For high-definition TV and other products with large data throughput, it is recommended to place them in the same room as the router, and choose 5GHz network to give full play to the advantages of fast 5GHz speed and low interference, so as to ensure that the connected equipment can obtain a faster and more stable use experience.

Third, select the appropriate WiFi working channel. In the actual network environment, there are a variety of wireless devices. When different devices choose the same channel or overlapping channel for communication, it will cause serious interference to the network. Users can reasonably set the working channel of wireless router, effectively reduce the interference between signals and improve the performance of indoor WiFi network. For example, a wireless router operating in the 2.4GHz band supports 14 channels in total, and 1 to 13 channels are available in China, of which 1, 6 and 11 are non-interference channels. In order to reduce interference, users can configure channels on the router interface.

Tips

Facing the problems existing in the current home WiFi router, users can select the appropriate placement position for the wireless router according to the spatial structure of the house and the placement of built-in entities, so as to reduce the impact of physical barrier on home WiFi coverage and transmission rate; Selecting the appropriate WiFi working frequency and channel can reduce interference and obtain a better use experience.

Although wireless router faces many problems and challenges, it is also an opportunity for the development of the industry. New systems and technologies such as ultra-high speed, low delay, adaptive frequency and power adjustment and sleep will continue to emerge. The use of these devices will eventually innovate the home wireless network experience.

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