How to choose the wireless coverage scheme

with the development of information technology, the network has become an indispensable part of people's lives. Previously, people used mobile phones only three points, look at the time, call, texting. Now, mobile phone has become a scaled-down version of the computer, QQ, play, turn the page, watch the news. Before talking about the Internet people's first reaction is the computer, now has become a mobile phone, now a mobile phone has become inevitable. However, there is a prerequisite for this kind of, there is a stable network.

A few years ago, some service venues, restaurants to attract customers, are posted at the door "air-conditioning development" logo, but the air conditioning is seasonal, only in the summer effective, and now, savvy businessmen have been replaced by " WIFI has been overwritten. " However, the impact of the unstable WIFI coverage instead of the customer use to bring irritability, but now the mobile phone traffic is already in use 4G , if the WIFI Slow speed or signal instability, many people would rather use their own mobile phone traffic 4G do not want to even wifi, then wireless coverage plan how to choose to get the most stable effect?

Let's insert a digression here. The most common problem in wireless coverage engineering is the same frequency interference,WIFIChannel1-13The only thing that really doesn't interfere with each other1,6, Oneit3A lot of engineers know how to use multipleAPthe time to separate the channel, the result is1,2,3,4that way, individuallyAPdivided, the results of interference still. The same frequency interference isAPthe difficulties of the world, anyAPmanufacturers are unable to solve this problem, the only way is to reduceAPnumber of uses. So like Mobile, Unicom's cover, usually one of their buildingsAP, the mobile uses the1Channel, Unicom will use6To avoid the same frequency interference between their devices, and to avoidAPThere is a co-frequency interference. and engineering in the process of the most feared is also the same frequency interference, in addition, they also need to consider their own labor costs, including equipment installation of the difficulty level, the amount of work, including the late maintenance frequency, and so on, these are the project in the selection of equipment needs to be taken into account.

The current coverage options on the market are roughly divided into three types: panel type, ceiling type and a kind of antenna that most engineers seldom hear.

panel Type: Everyone is very familiar with each room to install aWIFIpanel. The biggest advantage of this scheme is that the signal in the room is guaranteed to be hundred percent. However, there are some shortcomings in this scheme. First, the use of more equipment, the same frequency interference is difficult to avoid, do not deny, panel-typeAPyou can also eachAPset into different channels to avoid interference with the same frequency. On the first floor. -Room As an example, -a panelAPto use separately.1,6, Onethese three channels already have a certain amount of work, the General hotel has more than two floors, but pointsAPChannel is already enough trouble, really cover is the space, not the area of the calculation, each panel typeAPReal coverage area is not sure, the size of each room is not sure, the material is not sure, in addition to consider the same layer of interference at the same time also consider the interference of the upper and lower layers, can only say that the project is a bit large. Second, each panel has an active part, which is independently powered. The biggest drawback of electronic products is that you can't guess when he's bad, assuming that the panelAPthe damage rate is only1%, but a hotel or a hotel to do overlay, used to the panelAPless then dozens of, big hundreds of, replaced by a1%is equal to a few bad, a year bad several good, in case a month bad? At the same time bad also good, if separate time bad? A project down, later maintenance in the end of the year to go back to the local maintenance several times, this is the project to be considered. Third, installation and maintenance trouble, since installed in the room, there is no room to run, but in the signal step-by-step problem, it is impossible to say the installation of the signal to test, single installation and test results, each room at least two times in and out. And so on, these are the things that engineers should take into account when choosing a solution.

Ceiling Type: This is not strange to everyone. APpacked in corridors, eachAPcan cover4-6room around, greatly reducing the use of equipment. Installation is also simple, equipment installed in the corridor, not every room to run, generally one floor with4,5a suction roofAPCan be covered, but also very good to avoid the same frequency interference. But eachAPare independent power supply, any goods have the service life, but the service life of the source parts relative to the passive parts is relatively short, but also affect the active part of the current, voltage, these two uncontrolled problems. and ceiling typeAPis connected to the switch with a network cable, there are two problems, the signal will be with the network cable andAPattenuation of the aging signal. Second, the ceiling typeAPthe power of the home wireless router is almost large, with the same amount of machine, which means that the coverage4-6A room is already the limit, the signal is a little bit attenuated, the signal inside the room can not be guaranteed.

Day-Feed type: This kind of scheme everyone contact relatively little, what is the day-feed, the day-feed isAPThe feeder is connected with the ceiling antenna,APinstalled in corridors or weak wells, then ceiling antennas mounted in corridors, with feederAPto reach the coverage effect. Ceiling antenna is a passive part, that is, no additional electricity, not easy to damage, a suction ceiling antenna can be used to the protective layer of the ceiling antennas aging needs better, installed in the room, a suction ceiling line5,6are normal. The feeder is copper core wire, which is not easy to aging, which avoids the problem of signal attenuation caused by the aging of the line. The day-feed coverage scheme is generally telecommunications, mobile, unicom these large enterprises in use, because the day-fed coverage of theAPThe requirements are relatively high, the general use of industrial-grade powerAPor a dedicated industrial grade for a day-fed coverage solutionAP, so as to minimizeAPUse the quantity, completely eliminate the influence of the same frequency interference. Typically used for day-fed coverageAPThe power is relatively large, is the ordinary ceiling typeAPof the5,6so as to bring up a few ceiling antennas and guarantee the signal inside the room. The advantages of the antenna-fed coverage: First, the installation and use of simple, equipment installed in the corridor, the signal coverage to the two sides of the room, installation and maintenance do not run by room, the use of the same as the general home router as simple, the engineer after debugging customers themselves back to connect the network cable can use, because the signal output is used feederWANis the network cable, the customer will not go wrong. Second, the use of less equipment, the general one-floor only with a set ofAP, General Hotel3,4Floor , respectively, using1,6, One,1. There is basically no interference with the same frequency. Third, the signal is strong, generally used for the day-fed coverageAPthe transmitting power is1000mWabove, one floor oneAPIf you do cover, you just need to add2-4a ceiling antenna, which means that each suction line can be divided into the power of the200mWabove, that is, the ceiling typeAPof more than twice times. But this program also has a fatal disadvantage, because the use of less equipment, a floor generally only one or two wireless, if the device has a problem is equal to one floor without network, but the odds relative to other programs in the same frequency interference, equipment aging and so the probability of adding up low.

The wireless coverage scheme on the market is about the above, not that it is best, which is the worst option. Because the network's good difference in addition to the program is related to the quality of the equipment. What kind of equipment to use for coverage, and what coverage plan, in the final analysis is price-oriented, ultimately depends on the customer's budget. If you want to say which plan is more appropriate, from the point of view of the engineering company is the day-fed coverage scheme is more appropriate, because after all, large network companies are using this program.

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How to choose the wireless coverage scheme