The hottest indoor digital 4G strategy of Sichuan

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Sichuan Telecom: Indoor Digital enabling 4g+ strategy

in recent years, mobile 2k/4k HD video, HD voice volte and virtual reality (VR) have become increasingly popular. It is expected that more and more network traffic and connections will occur indoors, and more and more new services will also occur indoors. In order to win the first opportunity in the data age, some domestic enterprises have begun to gradually master independent intellectual property rights and gradually gain competitive potential in some fields; However, businesses have increased their strategic investment in the upgrading of indoor digital networks, of which Sichuan Telecom is the pioneer and beneficiary

huge demand promotes the upgrading of indoor networks

Sichuan Telecom is the first bolt fixture big solid operator and the second largest mobile operator in Sichuan, with CDMA, EVDO, LTE and other network systems. By the end of last year, Sichuan Telecom had 16million mobile users and another 8million optical fiber users, with an annual revenue of 16billion yuan

for Chinatelecom, the only standard to judge the quality of 4G network is user perception. Yang Fan, deputy general manager of Sichuan Telecom wireless network department, said in an interview with flying elephant that at present, Sichuan Telecom's 4G users are growing rapidly, which has brought about a rapid increase in indoor traffic. How to do a good job in indoor coverage and improve user perception has become our top priority. China's output is seriously insufficient

Yang Fan, deputy general manager of Sichuan Telecom wireless network department

for Sichuan Telecom, the 2G and 3G traditional indoor distribution systems that could originally meet the demand are not enough to use in the 4G era

the commercial practice of Sichuan Telecom in recent years shows that whether it is indoor scenes such as stadiums, transportation hubs and shopping malls, or outdoor scenes such as commercial streets, residential areas and urban business districts, the indoor network digitization scheme based on small cells can effectively improve the user experience, release the suppressed business needs, significantly stimulate the traffic growth of mobile broadband networks, and bring rich returns to operators. Therefore, in the future development of mobile broadband, small cells will play an increasingly important role

indoor digital coverage is an inevitable trend

according to Yang Fan, the traditional indoor distribution system DAS is an analog system, with a large number of passive nodes and many meta levels, while the new digital system architecture is very simple

Yang Fan summarized four absolute advantages of indoor digital network. First, the digital architecture has a revolutionary breakthrough compared with analog Das; Second, each element can be managed and maintained, and it is very convenient to maintain; Third, the original DAS system cannot support 4G MIMO technology, and MIMO technology can significantly improve network performance, which is a necessary means to improve user perception; Fourth, the new digital architecture supports the further smooth evolution of the network

the basic design goal of the traditional passive Das scheme is to solve the problem of 2g/3g indoor coverage holes. It can only provide voice services and basic data services in outdoor experiments. The reconstruction project is difficult, the performance is difficult to guarantee, and it is impossible to monitor every node, let alone provide accurate traffic maps to promote refined capacity expansion. Lampsite solution based on cloudbb architecture has many advantages: due to the end-to-end digital architecture, the system capacity software can be configured, and the network capacity and system resources can be flexibly adjusted; Support end-to-end visual operation and maintenance, and greatly improve the efficiency of operation and maintenance; Support the smooth evolution of future new technologies such as multi carrier aggregation, high-order modulation technology, distributed MIMO, etc

Sichuan Telecom has completed the digital upgrading of indoor networks in important indoor scenes such as office buildings, hospitals, industrial parks, government, enterprises and institutions, star hotels, transportation hubs in Chengdu, Mianyang and other places. By the end of 2015, Sichuan Telecom has deployed tens of thousands of lampsites, and it is expected that the deployment will exceed 100000 in 2017, completely overturning the traditional construction pattern of Sichuan Telecom. Lampsite has become the first choice for Sichuan Telecom to build indoor 4g+ networks

Yang Fan finally mentioned that in order to improve its continuous leading position in the development of 4g+ networks and even 5g networks, Sichuan Telecom will carry out cooperative research and development in many innovative technology fields of indoor digitalization in the future, such as authorized and unauthorized spectrum fusion, distributed MIMO, high-order modulation, indoor cellular value-added services, etc., so as to provide users with better network services

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