Shulou(Shulou.com)06/01 Report--

Antenna-fed coverage, as the name implies, is the use of AP, plus feeder, plus ceiling antenna to build wireless network. Thus, the use of AP is reduced to reduce co-channel interference.

How it works:

The AP used in the antenna-fed coverage is a high-power industrial-grade wireless AP, which is 7-8 times that of the general household wireless router and 5-6 times that of the general ceiling AP. High power is the basis to ensure the coverage effect. The greater the power, the better the penetration. The feeder is a copper core wire to avoid the serious attenuation of the signal in the process of transmission. The ceiling antenna is a passive component, that is, it does not need power supply to run, so the ceiling antenna is not easy to damage and the aging speed is relatively slow. the biggest feature is that the ceiling antenna is only used to transmit AP signals and will not occupy additional channels, and one AP on one floor, regardless of two or four AP external antennas, will not occupy additional channels, thus avoiding co-frequency interference completely. In the antenna-fed coverage scheme, an industrial-grade wireless AP is generally connected with 2-4 ceiling antennas, covering 16-24 rooms. Take the hotel with the corridor in the middle and the rooms on both sides as an example, the equipment is installed in the corridor, and the signal is covered into the room through the walls on both sides. The use of sky-fed scheme can well avoid co-frequency interference.

Function:

Day-fed coverage is generally used in hotels, guesthouses, office buildings where there are more rooms and more people surfing the Internet. Because the terminals of hotels, guesthouses and other networks are mobile phones and tablets, the traditional wired network coverage has little significance and is gradually replaced by wireless network locks. There are also many solutions and devices for hotel wireless coverage, such as ceiling or panel coverage scheme, each AP will occupy a channel, 2.4G wireless WiFi really does not interfere with each other only 1, 6, 11 these three channels, AP channel repetition will produce co-channel interference, affecting the stability of the wireless connection. To put it simply, the 2.4G wireless WiFi band is too crowded and easy to co-channel interference. The same-frequency interference is a difficult problem in the AP field. On the basis of the same area and the same environment, the equipment used is the least and the maximum elimination of the same-frequency interference in the scheme, so it is widely used.

Heaven-fed coverage scheme:

AP and ceiling antenna are installed in the corridor, the construction is simple, the wireless signal penetrates into the rooms on both sides of the corridor, there is no need to construct each room, and the equipment installed in the guest room is not easy to be damaged. The whole scheme has less equipment, fewer fault points, stable operation, and no maintenance all the year round after installation and debugging.

A set of wireless AP is placed on each floor, the wireless AP is connected to the computer room through POE power supply, and the wireless AP is installed in the corridor through the feeder connection ceiling antenna, each antenna is 10-20 meters apart, each antenna covers 6-10 rooms, and then 2-4 ceiling antennas can cover 16-24 rooms.

The utility model has the advantages of simple installation, low cost and can effectively avoid co-frequency interference.

Success stories:

In the early days, mobile, Unicom and other communication companies were mainly used indoors, and few engineers used it. After mobile and Unicom's mature coverage technology and the test of coverage effect for many years, the sky-fed coverage scheme has also been widely promoted. At present, many engineers have adopted the sky-feed coverage scheme to cover the network of hotels and guesthouses, and the coverage effect has also been recognized by hotels and residents.

For example: Baihao Hotel, Congyun Road, Huangshi Street, Baiyun District, Guangzhou City, Guangdong Province; Zhongshui International Hotel, Xiangshan District, Guilin City, Guangxi Province; Harbin Commercial University, Harbin City, Heilongjiang Province; Jinxiang Business Hotel, Kangping County, Shenyang City, Liaoning Province; Baodao × × and other hotels, guesthouses, student dormitories, × × and other hotels, hotels, student dormitories, etc., in Shibei District, Qingdao City, Shandong Province have successfully used the Tianfei coverage scheme for network coverage.

Features of sky-fed coverage scheme:

1. It is suitable for the transformation of all hotels and old hotels, with quick installation, simple maintenance and easy expansion.

2, installed in the corridor, do not need to carry out construction on each room, but also avoid the equipment installed in the guest room is easy to damage.

3. The whole scheme has less equipment, fewer fault points, stable operation, and no maintenance all the year round after installation and debugging.

4. Support WAP2 key, cooperate with enterprise routing server for Internet authentication management and flow control.

5. A small number of AP is used, different channels are set for each layer of AP, the same frequency interference is avoided, and the wireless connection is stable.

6. Low equipment cost, high coverage efficiency, no signal blind spot and dead corner, low radiation does not affect health.

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