What should I do when the wireless LAN signal is weak?

Wireless LAN has become one of the most commonly used network technologies. However, if we are faced with a weak network signal, how can we solve it. Here is a detailed introduction.

Q: I am now using a wireless LAN, but I feel that the data transmission speed is very slow. Is there any solution?

A: It is estimated that the signal status is poor. You can try to add an external antenna or adjust the wireless channel to improve the communication speed.

Wireless LAN communication is slow, probably because of poor signal. The signal status can be detected using the software included in Windows XP's "wireless network connection" or "wireless router Wireless Access Point.

When using Windows XP, you only need to click the network connection icon in the taskbar to display the connection status window. If four or five green lines are displayed, if only one or two lines are displayed, the signal status can be determined to be poor.

Distance, direction, or obstacle is also one of the root causes of the problem.

The distance between the wireless router and Wireless Access Point of the master machine) and the Wireless LAN card and wireless LAN adapter of the slave machine is too long, or when there is a metal door, iron frame or concrete in the middle, the signal transmission will become difficult.

A simple solution is to change the location of the master and slave machines. If possible, it is best to shorten the distance between the two. In addition, sometimes the signal strength changes greatly by changing the direction of the sub-machine. When there is an iron door in the middle, open it to see how it works. Sometimes it is very effective to adjust the master and slave to a higher distance from the floor.

In addition, the wireless LAN specification mainly uses IEEE802.11b, IEEE802.11g and IEEE802.11a, and 11b and 11g are better than 11a for obstacles.

If the signal still does not improve after changing the position and direction, you can add an external antenna to the master or slave.

In terms of external antennas, Japan's BUFFALO has released two kinds of products: "WLE-DA" and "WLE-NDR. If the direction of the master and slave is basically determined, you can select a fixed-direction antenna. Otherwise, you can select a non-oriented antenna.

According to the company, the fixed-direction antenna is connected to either the master or slave end, and the communication distance will be extended by about two times. If both the master and slave are connected to the antenna, the communication distance will be extended by about four times.

Reduce interference with household appliances

In a wireless LAN, The 11b AND 11g types Use a 2-4 GHz band wireless signal. Because wireless AV appliances, microwave ovens, high-frequency therapeutic instruments and other devices also use this band signal, when using these devices at the same time, they will compete for the same bandwidth, thus, the communication speed may decrease. That is, the "interference" phenomenon. Because 11a uses the 5.2GHz band, it is almost not affected by household appliances.

A simple solution is to change the placement of household appliances. If this does not work, you can try to change the "channel" of the wireless LAN ". You can use the software that comes with the Wireless Access Point of the wireless router ". From Channel 1 to Channel 14, the frequency band used can be adjusted at. By changing the channels used, the results may be completely unaffected by household appliances.

For the microwave oven, select 2 ~ according to the test results ~ Low-digit channels such as channels 5 are not easy to interfere. However, it is unclear whether it is valid for all devices.

In addition, in the environment where multiple wireless routers and wireless access points are used, communication speed decreases as wireless devices are allocated a fixed frequency band, which may interfere with each other. At this time, it is best to set the channel at a certain interval.

That is to say, although the available channel is 1 ~ Channel 14. If the bandwidth is not repeated, you can use a maximum of four channels (Channels 1, 6, 11, and 14 ).

It has been confirmed that although the 11g system for high-speed communication is compatible with 11b, the speed will decrease when two devices are used together. That is to say, even if the master machine is 11 GB and the Child machine includes products of both 11 GB and 11 B, the communication speed of the 11g Child machine will decrease as the Child machine is dragged down by 11b.

It is estimated that the progress of the 11g technology will be gradually solved. Download and run the firmware from the manufacturer's homepage.