Question 2: Micro base station and Hong Jizhan 1, one carrier can support seven users to talk at the same time. You can calculate according to this. 2. Hong Jizhan and micro-base stations are essentially the same, but the application scenarios are different.
Question 3: What are Hong Jizhan, Micro Base Station, RF Remote, Repeater and Indoor Distribution System? The so-called micro base station should refer to the indoor station. Some indoor base stations directly couple the signals of macro stations, while others directly add the base stations to the computer room for indoor distribution. Compared with Hong Fengwo, microcells are understandable, and their functions are similar to those of macro stations, but their power is smaller and their coverage is smaller. The coverage distance is between 100 m and 1 km, which can increase the system capacity. Generally, it can be used in conjunction with Hong Jizhan, and installed in places with dense telephone traffic, which can increase the capacity and quality of the system. Its pertinence is user density, like Northland Mall, Northland is the first in the world. Because there are many users, dense telephone traffic is a problem solved by installing microcells, but for repeaters, it can be understood as signal repeaters. First of all, the repeater can pull the signals of macro stations or microcells to the weak coverage area, and improve the utilization rate of base station signals, but it can't increase the system capacity, so the repeater can't be used in places with dense traffic. There are many repeaters, including same-frequency repeaters and frequency-shifted repeaters. Optical fiber repeaters are produced with the maturity of optical fiber technology! An optical fiber repeater consists of a near end and a far end. The near end is generally installed in the computer room, and the far end is installed in the area to be covered according to the design needs. The advantage of using optical fiber repeater is that the transmission distance is long but the loss is small, which is much smaller than using the same frequency repeater and feeder! Moreover, the optical fiber repeater can be installed flexibly, and other active devices are not allowed to be added, which has much less interference to the system. But the effect is very good.
Question 4: What do you mean by power failure in Hong Jizhan? In the communication industry, this is because when the station in Hong Jizhan is not closed (shielded), when the equipment is cut off, there will be power failure. . It's troublesome to stop.
Question 5: The difference between Hong Jizhan and repeater is 1, Hong Jizhan, which is the Iron Tower Station, which is relatively large, with one station covering dozens of kilometers. Hong Jizhan is a common means of wireless network coverage, which has the characteristics of large coverage area and heavy traffic load.
2. Micro-base station, a small base station installed in buildings or dense areas, has a small coverage and a small number of users. Micro-cell is also an important wireless network coverage mode. Compared with Hong Jizhan, the coverage area of microcells is quite small, but it can also carry more traffic and reduce the traffic load around Hong Jizhan.
3. The repeater amplifies the base station signal and transmits it to the coverage area of the base station. The essential difference between repeater, Hong Jizhan and microcell is that it has no capacity to carry traffic, and can only increase the coverage of base stations.
Question 6: The difference between distributed base stations and Hong Jizhan. The current macro war is also RRU+BBU, but there are three fixed RRUs, and the power of RRU is relatively large; The indoor base station is BBU+3 optical paths, and each optical path can be cascaded with 6 rrus at most. A * * is 18 rrus, which are distributed on all floors of the building, but each rru is smaller than Acer's and has a smaller coverage.
Question 7: What is a distributed base station? Configuration file editing of distributed base station.
With the continuous development of communication technology, base station products are more and more abundant, and each has its own characteristics. From the overall development, distributed base stations undoubtedly represent the basic trend of "next generation base stations". Distributed base stations have the advantages of low cost, strong environmental adaptability and convenient engineering construction. Especially in the future 3G mobile network, distributed base stations will be widely used. At present, three 3G standards TD-SCDMA, WCDMA and CDMA2000 all have distributed base station products. Many manufacturers have increased their investment in the research and development of 3G distributed base stations, and at the same time, they have continuously introduced 2G distributed base station products, so the application of distributed base stations will be more and more extensive.
The core concept of distributed base station structure is to separate the traditional Hong Jizhan baseband processing unit (BBU) and radio frequency processing unit (RRU) and connect them through optical fiber. When the network is deployed, the baseband processing unit, the core network and the wireless network control equipment are concentrated in the computer room, and are connected with the radio remote unit deployed at the planning site through optical fibers, thus completing network coverage, reducing construction and maintenance costs and improving efficiency.
Please refer to Baidu Encyclopedia for details.
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