5g is an era of indoor coverage. 5g has three characteristics: high speed, large connection and low delay, which will make 5g services mostly occur indoors. With the acceleration of indoor and outdoor base station construction of operators in 2020, it is predicted that more than 80% of 5g traffic will occur indoors.
On November 23, all media of communication world planned and organized the 12th issue of 5g “accelerated run” series forum, which is ready to launch. 5g small base station will usher in the turning point of outbreak. Zhang Li, director researcher of wireless and terminal Technology Research Institute of China Mobile Research Institute, discussed the demand and application of 5g small base station. She believed that the upstream and downstream of the industrial chain should consider the optimization and maturity of product solutions, the improvement of cost performance, indoor and outdoor interference avoidance and other key issues, while improving the after-sales, delivery, operation and maintenance capabilities.
5g small station needs to overcome the difficulties of traditional construction
China Mobile makes every effort to build 5g quality network, laying the foundation for business development. It is understood that novel coronavirus pneumonia is overcome by China Mobile, and we are committed to building a 5G network with extensive coverage, advanced technology and excellent performance. We also vigorously promote the development of ToC and ToB businesses based on the largest SA network in the world. Zhang Li said that based on the characteristics of 5g business, China Mobile has put forward different planning requirements for three application scenarios and adopted corresponding frequency planning. In view of the low capacity demand of ordinary public network scenarios, 2.6g can be considered for indoor unified use.
For high-capacity public network scenarios such as airports and shopping malls, 2.6g can be preferred. In case of CO frequency interference with outdoor peripheral macro stations, fine adjustment of handover band or frequency isolation transition can be considered; in ultra-high capacity areas, 2.6g cell splitting or 4.9g band superposition can be used.
For indoor private network scenarios such as smart factory, there are high requirements for reliability, delay, uplink rate, etc., and indoor schemes such as 4.9g large uplink slot ratio can be considered. “We have carried out the overall planning in 5g indoor, aiming at the special needs of the industry and network, such as large bandwidth, low latency, reliability, etc., we have carried out the special planning for the network area.” Zhang Li said.
At the same time, Zhang Li believes that if the traditional indoor construction scheme is adopted, it will face problems such as the transformation of passive Das rooms and the difficulties in management and control, and there is an urgent need for 5g small base stations and innovative construction schemes with high cost performance and easy deployment and management. “The vertical industries are diverse and the services are rich. 5g small stations have the characteristics of convenient deployment, high capacity and more flexible frame structure, which can meet the diversified and differentiated needs of the industry network Zhang Li said.
5g small station application scenarios are more extensive
Compared with 4G, 5g stations have both similarities and differences. Zhang Li believes that 5g small station type is similar to 4G. Drawing on 4G deployment experience, 5g active room will be mainly distributed and expanded at present.
However, there are many differences between 5g and 4G stations. 4G leather station is located in medium value and small area. For example, 4G integrated leather base station has small transmission power and limited coverage. It is mainly used in small indoor places such as business hall and coffee shop to solve the problem of low signal coverage and improve the network’s ability to support data services. Compared with distributed pice base station, 4G extended pice base station is weaker in channel number, community capacity, user capacity, etc. it is mainly used in hotels, office buildings and other low value areas. In Zhang Li’s view, compared with 4G small stations, 5g extended leather station plans 2tr / 4tr, multi cell, multi frequency and multi-mode solutions, which can be extended to more business value scenarios. In addition to wider application scenarios, 5g small stations have wider bandwidth, higher power, more cells, more station types and higher technical requirements. At the same time, 5g small station network architecture is more simplified, based on the three-tier architecture, directly access to the core network, without access gateway; standardized South interface, deployment of unified intelligent network management; based on the “I wireless” technology concept, with new functions of dict integration.
Three challenges for commercial deployment of 5g small stations
Recently, Yang Jie, chairman of China Mobile, said at the China global partners conference that the contemporary digital transformation presents the new characteristics of “five vertical and three horizontal”. We should accelerate the promotion of “four digital innovations”, give full play to the leading role of scientific and technological innovation, and actively lay out 5g + aicde. In 5g + aicde, blockchain, positioning and big video are newly integrated into the innovation system. Therefore, indoor positioning will be one of the key points for operators in the 5g era.
However, the commercial deployment of 5g small base stations still faces some challenges. Zhang Li believes that, first of all, the functional performance of 5g extended leather station needs to be optimized, and the cost competitive advantage still needs to be further improved. Secondly, the development of the upstream and downstream of the industrial chain is not balanced. At present, the 5g small station industrial chain presents the rugby shaped characteristics of thick in the middle and thin at both ends. The development of the upstream and downstream of both ends is not balanced. There are many system integrators, but the service capacity needs to be enhanced. The chip and other industries have less investment and single scheme.
“5g small stations need to consider key issues such as product optimization and maturity, cost performance improvement, indoor and outdoor interference avoidance, and improve after-sales, delivery, and operation and maintenance capabilities,” Zhang Li suggested. 5g network construction costs are high, so new products and networking solutions need to be explored, and interference elimination capabilities can be improved. For small station manufacturers, after-sales delivery capabilities and operation and maintenance capabilities should be enhanced.
Editor in charge ajx