Weak current College】 【five measures quietly songsong resolve wireless network causes.

RF causes can lead to a wireless local area network (WLAN) deployment of catastrophic questions. However, many companies can also use them to make do with wireless networks, nor have any trouble, but some good wireless network installation, but aware of the network and cannot be the same as the plan of work. From external RF sources often unsettling signals is the culprit. Therefore, we need to understand the effects of radiofrequency disturbed and prevent the causes of the technology.

Don't blame the network slow, RF causes is the culprit

In order to understand the wireless network and RF causes related questions, no harm high-speed check 802.11 station (wireless communication with clients and access points) is how to access the wireless media. Every other station at 802.11 does not transmit data packets when talent. Suppose another station happened to sending packets to the other stations will wait until the media is free. Real 802.11 media access protocols, more complex, but this analysis allows us to understand more.

RF causes include unsolicited disturbed sexual RF signal, it will be the infix function, wireless operation because 802.11 media access protocol features, arrived at the necessary amplitude and frequency of the causes of RF signals, looks like 802.11 station send packets, and, of course, this is a false signals. In disturbed signal before, this kind of false signals will cause 802.11 station before you try to access the media have to wait an indeterminate amount of time.

More awkward is disturbed, RF does not abide by 802.11 Protocol reasonably 802.11 standing in the process of sending packets, there are disturbed signal can suddenly start stirring up trouble. Assuming that the attack of this case, the destination station will receive packets are wrong, and you cannot use the "confirm" signal response source station. On the other hand, the origin website will attempt to resend the packet, it will further add network operating capital.

All this will lead to network latency, the user will not be satisfied. Sometimes, there are disturbed in RF, 802.11 Protocol will automatically switch to a lower data rate (this also reduces the use of a wireless order of use), and try to continue to operate. The worst cake is waiting until it will stop 802.11 disturb the signal disappears, the delay time can be up to several hours or even longer.

RF disturb what source?

On the wireless network 24.GHz, disturb the signal source is available in the following ways: microwave ovens, cell phones, Bluetooth-equipped, frequency hopping spread spectrum wireless network, nearby wireless networks. Of these, the most destructive is the people at home and in the universal application of 24.GHz phone and cordless phones. Assume that someone is a wireless network (such as using 24.GHz band 802.11bor802.11g) is located in room use this mobile, wireless network function will be greatly diminished.

From the AP about 3 meters range of microwave ovens will incur wireless network (802.11b/g) function. Of course, in this case the microwave oven are tasks. Suppose someone is very close to the place of operation of the station 802.11 support Bluetooth equipment, such as notebook computers and PDAs, especially the assumption at this time interval is working with the station 802.11 it communication station a long time (that is, the signal is weak), will incur serious decrease function. Frequency hopping spread spectrum wireless network, although very rarely, but assuming that exist, to incur revolutionist reduce also extremely serious. Like with your wireless network, wireless network adjacent network, assuming that you are not coordinated with the other band selection, will stir up.

Take method prevent RF disturbed

Unless you are the "Superman", otherwise you are not able to directly see or wipe out r.f. disturbed. Of course, in the process of using the network, you may be aware of questions, such as the perceived speed of Internet browsing very slowly.

The following network-man gives some tips that you can think to use these methods to reduce its own network of RF causes doubts:

1. analysis of RF disturbed to sexual

You can have wireless network before doing so, it mattered that radiofrequency field investigations to perform analysis. Also, in the device, see the conversations that are applied to other RF equipment. This will allow you to get some information that can help you what action to take resolution ability to reduce disturbed.

2. prevent running of unsettling source

In the know about the potential for RF causes the source, you can turn it off to disturbed collated. This is just the best way to RF subject. However, this method does not always apply. For example, you can't let the next companies are using mobile phones for personnel use their phone aborted. However, in the company's users are located, you can turn off Bluetooth-equipped application and operation of the microwave oven.

3. provide sufficient scope for wireless network mask

Reduce the frequency of one way to do this is to ensure that the wireless network has a very strong signal can be resolved to its users. Assume that the signal weakens, unsettling signals naturally even more trouble. This is like you are talking to with a body, then a plane fly over, in order to enable each other to hear that you had to have a little sound. Of course, this also means that your site do a thorough investigation to resolution AP (access point) the number and location of the best.

4, the correct configuration parameters

Suppose you are deploying 802.11g network, should be adjusted to the AP frequency, so that it can prevent the use of potentially disturb the signal's frequency. But this approach is not always effective, but worth a try. For example, microwave ovens are usually the top with 2.4GHz bandwidth is inconsistent. Thus, you will have to be adjusted closer to the AP, microwave ovens to only use 1 or 6-channel instead of 11 channels.

5, the deployment of wireless networks 5GHz
R > today's non-minority RF causes are located 2.4GHz band. Assume that you are aware of our first plane that other prevent disturbed technology up not too large, then you no harm on deployment 802.11a or 802 .11n network. To do so, in addition to allowing you to prevent RF disturbed, you can also make the network have higher throughput.

About RF disturbed a question is it over time. For example, a neighbor just bought a cordless phone and use it frequently, perhaps in your wireless network in the area of application is a great add. This means that the effects of radiofrequency disturbed over time, of course also have to disappear. Thus, you can advance the investigation of potential radio frequency disturbed.

In order to make their network more smoothly, please pay close attention to stir up the wireless networking function reduce those wireless equipment.