Smart home networking technology brief introduction

Ethernet cable routing can achieve up to gigabit LAN, which is the preferred transmission medium for home networking. To complete the Ethernet cabling of multiple rooms, the user needs to carefully design the network topology (including the network architecture, switching nodes, aggregation nodes, etc.) and perform the wiring construction.

Home network

1) LAN system

When building a small local area network at home, you only need to apply for an Internet broadband line so that each room can use the computer to access the Internet at the same time. In addition, with the trend of networked appliances, network audio and video centers, network refrigerators, network microwave ovens, and network video surveillance will emerge one after another. These devices can all access the Internet at the nearest network interface.

The LAN to be built is a star topology. The failure of any one node or connection cable will only affect one node and be installed in the information access box. The RJ45 patch Panel module functions as the master control. Therefore, the line access from the network socket is behind the wiring panel. The information access box should also be equipped with a small network Switch. It is connected to the front of the patch panel through the RJ45 jumper. interface.

2) Cable TV System

Home cable television systems should use dedicated bi-directional, highly shielded, highly isolated 1000 MHz coaxial cables and panels, distributors, and amplifiers (more than four branches are required). Dispensers should use high quality devices marked with 5-1000MHz specifications. The cable should use 75-5 type and four-shield physical foam coaxial cable with good shielding performance against outside interference to ensure that the signal level of each room is stable; the cable TV image is clear and there is no network interference. The cabling of the cable TV is relatively simple. For a general commercial house, only a one-fourth splitter module can be installed in the home information box, and the cable television connected to the outside can be distributed here to the living room and each room.

3) Telephone system

After installing a small-telephone program-controlled switch at home, you only need to apply for an outside telephone line, so that each room can have a telephone, and both internal and external calls can be dialed. When incoming calls are ringed, until someone answers the call. If it is not your phone, you can go to another room by pressing the room number on the telephone.

4) Home Theater System

The establishment of a home theater system should be the choice of many homes. Home theater refers to the clear and colorful images that are the same or similar to the movie theater at home, full of dynamic and live sound effects. Home theater equipment is divided into two parts: video and audio. The video part is a very important part of the entire system. It usually consists of a large-screen color TV or a projector.

The AV amplifier is the center of audio playback and features multi-channel sound reproduction. When it comes to multi-channel playback, it is inseparable from the surround sound standard.

Gong's popular surround sound standards are as follows.

(1) Dolby Digital surround sound (5.1 channel).

(2) DTS surround sound (5.1 channel).

(3) DTS-ES Discrete surround sound (6.1 channel).

(4) THXSurroundEX surround sound (7.1 channels).

The home theater speaker consists of five, six, seven, etc. each plus a heavy speaker. The main speakers and center speakers on the left and right fronts can be wired without wiring, while the rear surround speakers and rear speakers should be wired. Home theater system wiring mainly includes the projector's video cable (such as VGA, color difference cable, DVI, HDlvlI) and speaker cable. Since it is the top home theater system, these cables are not connected, that is, a line goes to the end, the connectors and the lines are all customized, and therefore independent of other wiring systems, generally only in the living room or study wiring. The length of the traces must be accurately calculated at the time of design in order to customize the length of cable.

5) AV system

AV is a collection of video and audio. The output of the signal includes one video, one left channel, and one right channel. Generally AV equipment is in the living room. If it is necessary to enjoy the audio and video played by these AV AV equipments in each room, the above-mentioned three types of lines must be connected to each room through home wiring. The home AV system includes a DVD AV system, a satellite receiver AV system, and a digital television AV system. Through the AV signal transmission system, you can watch video discs in other rooms, watch satellite TV frugal, watch digital TV programs without having to repeatedly purchase multiple DVDs, satellite receivers, and digital TV set-top boxes.

2. Network selection

(1) WiFi is suitable for establishing a wireless network inside a home. It is the main networking mode for various smart terminals. Ideally, WiFi can provide hundreds of megabits of wireless bandwidth, making it possible for wirelessly hosted multimedia applications, especially video media. However, the coverage of wireless coverage in the user's home is usually different. In some users' homes, due to obstructions (such as furniture, walls) and communication distances, the coverage and intensity of wireless signals will be greatly reduced, thus affecting the networking. effect. There are 2.4GHz and 5.8GHz WiFi products in China. The former is mainly used for wireless Internet access, and the latter is more suitable for wireless video transmission.

(2) Coaxial cable is mainly used for the transmission of cable television broadcasts in China and can also be used to transmit data services through modem and demodulation. However, the data transmission frequency bands that can be used are allocated to radio and television operators.

(3) Power line transmission data. The power outlets are located in various rooms of the home, and the access point selection is relatively flexible. Therefore, completing the networking based on the power lines is an effective means for the home deployment of the telecommunications business.

Users can comprehensively use home networking technologies such as Ethernet cable, WiFi, and power lines, and combine cost factors to reasonably select supporting terminals. The recommended networking principle is: Ethernet is the first, WiFi provides mobility, and power line communication achieves wall coverage. The recommended networking products include external AP.AP external gateways and power line communications products.

3. Fiber to the information box

Users use the WiFi wireless Internet service, and the cable convergence points in the home (such as large-scale home information boxes) can meet the requirements for placing PON uplink e8-C devices. However, the wireless coverage of external information boxes cannot meet users' wireless Internet access requirements. The recommended networking solution is the AP external gateway + location AP product portfolio, which provides wireless Internet coverage at home. Select the wireless AP coverage effect in the user's home to meet the user's business location, from the location of laying a Category 5 cable to the cable convergence point (home gateway placement point), and provide power outlets (powering wireless AP devices) .

4. Fiber to the living room

The user has two IPTVs, which are used in the living room and bedroom respectively. The living room TV wall and bedroom are not equipped with a 5.8GAP-APClient product portfolio or power cats to achieve IPTV service deployment.

The 5.8GAP-APClient product portfolio carries IPTV, selects the location suitable for 5.8GAP placement, lays a Category 5 cable to the cable convergence point (gateway placement point), and provides a power outlet (powers wireless AP devices). The set-top box passes 5 Category connection 5.8GAPClient (wireless client).