Analysis: Extended wireless network signal transmission distance scheme (1)

Distance, coverage, and penetration of wireless networks have always been a concern. For long-distance transmission, wireless outdoor bridge bridging is generally used, and the bridge transmission distance can be up to dozens of kilometers. The main function of wireless outdoor bridge is to bridge two different LAN. The wireless outdoor bridge is an ideal solution that connects buildings, campuses, industrial zones, and remote areas. For example, you need to connect two different LAN networks in the two buildings. If you follow the traditional wired method, even if it is close at hand, you also need to wire the pipe, using the method of laying cables or renting lines, it takes a lot of money. It is also necessary to consider whether the surrounding environment conditions are met. Wireless Technology can connect to the LAN directly through two wireless bridges, and the distance can reach dozens of kilometers. This not only saves the cost of laying lines, but is not limited by the geographical environment.

In fact, SOHU-level wireless LAN networking generally uses wireless access points or wireless routers as wireless base stations, basically not involving bridges. How wide is the coverage of common Wireless AP? According to the protocol standard, the coverage of IEEE 802.11b and IEEE 802.11g is: 100 indoors and 300 outdoors. This value is only a theoretical value. In practical application, in addition to signal connection, it also has the value of speed. Therefore, the actual use range of Wi-Fi wireless products is: 30 meters indoors and 100 meters outdoors (no obstacle ). In practical application, various obstacles will be encountered. Among them, glass, wood boards and gypsum walls have the least impact on wireless signals, while concrete walls and iron have the greatest impact on wireless signals.

Solution

If you have purchased a Wireless AP, you must consider extending the wireless transmission distance after setting up the entire wireless network and finding that the wireless coverage distance is not far enough. Two methods can be used to prolong the wireless transmission distance. Method 1: first, the purchased AP antenna is detachable. You can choose to replace the antenna with a higher benefit value. Method 2: Add a wireless base station for wireless relay to improve the transmission distance. In fact, this method increases the number of APS within a certain range to achieve signal transmission. The following describes method 1.

1. Relay Bridge + Omnidirectional Antenna

The relay point uses a bridge, and the antenna uses an omnidirectional antenna. The advantage of this method is that the investment is the least, but the transmission distance is closer.

2. Relay Bridge + oriented Antenna

The relay point uses a bridge, and the antenna feed system uses a divider and two sets of targeted antennas. Of course, the best solution for two sets of antennas is to avoid the divider. The advantages of this method are far away.