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How to solve 5G indoor entry may be a difficult problem. Updatetime：2019-09-17 09:43:54
5G signal is difficult to "enter the room"
"At present, more than 8000 5G base stations have been delivered to the three major operators by the Beijing Tower." Beijing Iron Tower related person in charge told reporters. However, reporters in many parts of the capital test found that outdoor can often find 5G signals, while indoor signals are not satisfactory.
CCTV Building, Sino-Japanese Friendship Hospital, Daxing Airport... In these areas where 5G signal coverage has been achieved, it is not difficult for citizens to find a 5G era "standard" room division equipment. The indoor sub-equipment is equivalent to 5G indoor micro-base station, which can distribute signals relatively evenly indoors. The head of Beijing Iron Tower told reporters that in the future, the number of 5G outdoor large base stations in Beijing may be several times the number of 5G outdoor large base stations.
Low antenna position affects 5G coverage
"The small coverage of 5G signals is also related to the consideration of reducing economic costs." Beijing Iron Tower said this person in charge.
"At present, more than 8000 5G base stations have been delivered to the three major operators by the Beijing Tower." Beijing Iron Tower related person in charge told reporters. However, reporters in many parts of the capital test found that outdoor can often find 5G signals, while indoor signals are not satisfactory.
Through an OPPO Reno 5G mobile phone, reporters quickly found a 5G signal with a strength of 3 squares in the north of Beijing Railway Station. When walking outdoors, the signal swings between 2 and 4 cells. The download rate and upload rate of 5G are 302 Mbps and 16.3 Mbps, respectively.
Reporters also tested 5G indoor signal, random walk into a roadside store, reporters found that every five or six meters in the direction, the signal will drop a grid. Originally displayed outdoors as a three-grid signal, not yet waiting for reporters to enter the innermost store, 5G signal has completely disappeared, can only use 4G signal. This is not accidental. Reporters then tested in several locations in Beijing. Soon after entering a room or building, 5G signals almost disappeared.
Why is 5G signal difficult to "enter the room"? An operator's staff told reporters that in the 1980s, the frequency of 1G was 800MHz, and now the frequency of 5G has reached 4900MHz. The higher the frequency of electromagnetic wave, the shorter the wavelength, the faster the attenuation, and the easier to be shielded by obstacles. This means that it is difficult for 5G to cover indoor signals only by outdoor base stations. According to a person in charge of Beijing Iron Tower, the signal range of 5G base station can cover up to 1 square kilometer, only half of that of 4G base station.
CCTV Building, Sino-Japanese Friendship Hospital, Daxing Airport... In these areas where 5G signal coverage has been achieved, it is not difficult for citizens to find a 5G era "standard" room division equipment. The indoor sub-equipment is equivalent to 5G indoor micro-base station, which can distribute signals relatively evenly indoors. The head of Beijing Iron Tower told reporters that in the future, the number of 5G outdoor large base stations in Beijing may be several times the number of 5G outdoor large base stations.
Low antenna position affects 5G coverage
"The small coverage of 5G signals is also related to the consideration of reducing economic costs." Beijing Iron Tower said this person in charge.
For the communication base station, the higher the 5G base station is, the larger the signal coverage is. However, according to the disclosure, most of the 5G base stations built by the Beijing Tower are transformed from the original base stations. On these towers, the installation sequence of the base station is basically that the antenna of the 3G base station is on the top, the antenna of the 4G base station is in the middle, and the antenna of the 5G base station is the lowest.
"The result is that the 5G base station antenna may be about 10 meters shorter than other base station antennas. Don't underestimate the height of 10 meters. The coverage of 5G base stations may be reduced by at least 100 square meters. The person in charge said.
Why don't operators hang 5G base stations on top of the tower? The person in charge explained that disassembling and reassembling the original base station required various costs, such as wiring, and there was a certain risk of damage. In order to construct 5G base station quickly and cheaply, operators usually choose to install 5G base station under the original base station.
Adding base station equipment still has a lot to go through.
Operators want to successfully build 5G base stations into residential areas or sub-units into office buildings and residential buildings, the actual operation is not easy. Similar to broadband household access, the three major operators in the future will also "horse race enclosure", competing for the opportunity to install 5G base stations and sub-units into residential areas and corridors.
5G signal coverage needs to build more base stations, but some community residents are not friendly to base stations. According to public reports, in some districts of Heze, Changsha, Hunan and Changchun, Jilin Province, three major operators have been evacuated in succession in recent years. The reason is that the owners generally believe that the radiation of base stations is too large or harmful to human health. Although operators around the country have repeatedly explained that the construction of base stations in accordance with national standards will not affect the health of residents, there are still owners collectively obstructing the construction or even destroying base station facilities, but local operators finally choose to withdraw.
The construction difficulties of operators entering residential areas or office buildings are not limited to this. This year, the Municipal Communications Administration disclosed that the city still has property to intend to enter operators to charge a high entry fee. In this regard, the city is carrying out relevant renovation.