Accelerate the layout of the hottest industrial ch

2022-10-22
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Accelerating the layout of the industrial chain, small base stations will become the main force of LTE network

at present, small cells are receiving more and more attention from the industry. Some experts even predict that the number of small base stations will exceed that of traditional macro stations in the event that LTE can change the active network in sequence. In fact, the current industrial chain around small base stations is gearing up for the arrival of the era of small base stations

smart terminals cause demand

what is a small base station? In addition to macrocell, microcell, metrocell, picocell and femtocell have gradually risen in recent years. Compared with macro stations, their characteristics are to improve indoor depth coverage, increase network capacity, and enhance user perception. Among them, micro base stations have the comprehensive advantages of rapid and flexible deployment and high cost performance for outdoor blind filling, heat filling and other scenarios; For urban, residential and other scenarios, Metro base stations have the characteristics of wide coverage radius; For indoor public places, Pico base station has the comprehensive advantages of low cost and easy deployment; For families, femto base stations have the advantages of rapid deployment and large capacity

with the more and more extensive application of these small base stations, the concept of small cell has emerged in the industry, and its definition is more comprehensive, including Microcell, metrocell, picocell, femtocell, etc. As for the origin of small base stations, Jiang Yingbo, vice president of minxun technology wireless division in China, said that with the development of small base stations, the differences between several small base stations have become increasingly blurred. There are many overlaps between them. From 2005 to 2006, the term femtocell appeared. Femto is a quantifier, smaller than Pico. Femtocell initially mainly refers to small base stations (home base stations) that are smaller than picocell and suitable for families. However, with the development of femtocell technology, the ability of femtocell (such as supporting the number of users) is becoming stronger and stronger. The application scenarios can be extended to those belonging to traditional Microcell and picocell. Femtocell also began to evolve into Metro femtocell, enterprise femtocell, rural femtocell, etc. Therefore, the current femtocell can be a home base station, microcell or metrocell. At present, it is collectively referred to as small cell

why is the station getting more and more popular? Due to the sharp increase of intelligent terminals in recent years, Acer stations cannot cope with such a large number of digital needs, and 3G networks become more and more unstable. This is exactly a good opportunity for small base stations to play a role. According to the research results of informa, a famous market research company, operators are not only applying small mobile base stations to families, but also planning to implement them in public areas: SK Telecom of South Korea has begun to deploy the world's first LTE (long term evolution) small mobile base stations; Telefonica currently uses Wi Fi solutions, but it is planning to use cellular technology in small base stations in the third quarter. In the world, the number of 3gfemto base stations deployed has exceeded that of 3G macro base stations. According to ABI research, the supply of small cells will rise to 36.8 million by 2016, 94% of which will be used indoors

China's three major operators have also expressed their determination to carry out 3G small mobile base station services. In China, China Unicom's femto based 3G relay service has been in commercial use for nearly two years; China Mobile's tdfemto pilot has also further expanded from Shanghai to four regions including Guangdong and Zhejiang. At the same time, China Mobile has also carried out TD-LTE tdfemto dual-mode research in the pilot cities. Huangyuhong, vice president of China Mobile Research Institute, said that China Mobile will conduct research on small cells in TD-LTE research

collaboration is the key

many industry experts say that small base stations will be widely used in the future deployment of LTE. In this regard, Jiang Yingbo said that in the LTE period, in order to support more users and higher speed, the physical law determines that the cell radius of the base station must be smaller and smaller. There will be many small base stations in the wireless network covered by the macro cellular umbrella

however, the large number of applications of small base stations will change the traditional network structure, which will bring a series of new challenges. Jiang Yingbo said that how to better solve the interference, synchronization, handover, retransmission and many other problems between so many (kinds) base stations is the challenge in the future. However, it is gratifying that 3GPP has considered the small base station (HENB) at the beginning of LTE standard formulation, which provides a solid foundation for the overall capability of LTE network

for the development of small base stations, how to deal with the relationship between small base stations and macro stations is very important. Ericsson proposed the concept of hetnet at the world mobile communication conference in Barcelona at the beginning of this year. At present, most of the hetnet solutions in the industry generally adopt the way that the macro base station and the small base station share the same frequency and process and calculate groups through relevant programs. The macro base station and the small base station cooperate to eliminate interference through the Asian glass fiber composite market, which accounts for 35% of the world's total output value of glass fiber composite materials. To a certain extent, the small base station network is a way to expand and enhance the capacity of the macro base station, not a simple superimposed network, which can minimize interference

at the same time, for the future hetnet composed of small base stations and macro stations, the network structure is more complex. At present, many manufacturers have been conducting research on son, trying to complete the automatic collaboration between small base stations and macro stations

relevant institutions predict that from 2012 to 2015, the public access point of small base stations will transition from the traditional form to the next generation model. These new devices will incorporate a variety of advanced technologies, including new chipsets, advanced RF, network management and low-cost components

in addition, the relationship between small base stations and WLAN networks has been attracting attention in the industry. At present, small base stations and WLAN are complementary. For example, the TD-SCDMA femtocell box of China Mobile integrates the function of Wi Fi. Jiang Yingbo said that the major disadvantage of Wi Fi at present is that in the case of dense layout, the interference is serious, the speed can not go up, and the user experience is not good. From this point of view, LTE small base stations have advantages. LTE small base stations are a system that operators can centrally manage and schedule, and the frequency band is also proprietary. From the technical level, LTE and Wi Fi use OFDM based technology. The original starting points and goals of 3GPP and IEEE are different, and the natural product results will be different

industry chain is gearing up

at present, the small base station industry chain is gearing up for the arrival of the era of small base stations. In terms of chips, minxun technology is a 3G and LTE dual-mode concurrent system level chip (SOC) solution. Jiang Yingbo said that in the development of small base station technology, the first thing to reduce the cost and power consumption of small cells is to improve the integration of chips, that is, integrate more functions into one chip and support more users at the same time. Another technology trend is that chips should support dual-mode (3g+lte). For example, td-scdm+td-lte dual-mode chip, wcdma+fdd LTE dual-mode chip, etc

in terms of system equipment manufacturers, traditional equipment manufacturers have launched corresponding small base station products. Huawei's macro station and atomic station work together to increase the capacity by 4.7 times. NEC is the largest equipment supplier in the Japanese market, serving the largest LTE network. Liang Liang, manager of NEC's network business integrated strategic cooperation department, said that NEC also hopes to promote NEC's accumulation in the field of mobile communications to the world through small cells. At present, the joint venture of NEC and Wuhan academy of postal Sciences/Fiberhome has participated in the TD-LTE test of China Mobile. Td-lte/fdd LTE common platform base stations have been basically developed, and EPC can connect TD-LTE and FDD LTE at the same time. NEC plans to launch TD-LTE small base stations in the first half of 2013

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