4G indoor distribution construction solution

4G indoor distribution construction solution

How to Implement indoor coverage has become the biggest challenge facing operators in the 4G era. Compared with 3G networks, the 4G indoor distribution system pays more attention to refined indoor coverage. system indicators should not only focus on field coverage, but also on capacity, signal quality, switching, frequency, and interference, and network construction and maintenance costs. In the specific project implementation stage, you also need to pay attention to the system integration, solid, beautiful, engineering adjustment and measurement should be greater than the traditional Chamber issues. In terms of system evolution, the coverage precision of 4G indoor coverage networks also evolves from the surface to the point. The more detailed the Scenario-Based Indoor Coverage solution is, satisfying the user application experience is the best standard for indoor distribution construction.

　Satisfying user application experience is the best standard for Indoor Distribution Construction

According to the characteristics of 4G Chamber construction, we can find the following six problems.

First, in terms of coverage, it is the foundation of 4G coverage planning to reasonably determine the data rate target of edge users. Different data rates have different demodulation thresholds, resulting in different indoor coverage areas. Therefore, to determine the effective coverage of the room, we must first determine the minimum protection rate required by the edge users of the residential area. Due to the complex environment, the determination of the indoor edge field of the 4G system needs to be extremely fine. Because 4G uses two-dimensional scheduling in the time domain/frequency domain, it is necessary not only to determine the coverage of the residential area at the minimum guaranteed speed of the given edge, you also need to determine the number of wireless resource blocks and signal-to-noise ratio requirements of businesses at different rates in the edge area of the residential area.

Second, 4G resource scheduling is more complex, and the coverage is closely related to resource allocation. In a 4G network, in order to meet different coverage environments and planning requirements, you can flexibly choose wireless resource blocks and modulation encoding methods used by users. In the actual network, the number of wireless resource blocks, user rate, modulation and encoding methods, and signal-to-noise ratio of the business are mutually affected, resulting in complicated 4G network scheduling algorithms, during the planning of the indoor release system, it is another important and difficult point for indoor distribution construction to reasonably determine the wireless resource blocks and modulation encoding methods to make them more in line with the actual network conditions.

Third, the interference problem is that the 4G room should be considered. Interference between different systems and the same system cells affects the 4G indoor coverage performance. After entering the system, the 4G room should develop collaboratively with the existing system, neither affecting the previous system application nor meeting its own design requirements. The performance of the multi-system room should be weighed. The utilization and co-construction of existing system antennas and cables also need to be concerned.

Fourth, the 4G Branch link budget is more complex than that of 2G and 3G networks, it is necessary to comprehensively consider multiple parameter configurations, including service rate requirements, system bandwidth, antenna configuration, MIMO configuration, public overhead load, transmission end power gain and loss calculation, and acceptor power gain and loss calculation.

Fifth, with the construction of 4G room separation, more and more devices are used in the indoor distribution system, and a huge amount of equipment consumes a huge amount of energy every moment. The problem of energy conservation and emission reduction has aroused more and more attention in various aspects. Energy-saving and emission reduction require the use of energy-saving equipment first, followed by the rational allocation of network resources, and efforts should be made to avoid unnecessary overprovisioning of network resources. In addition, the use of new application-type energy-saving technologies should be selected, at the same time, it is necessary to avoid unnecessary occupation of site and project construction resources. Energy conservation and emission reduction under the construction of the chamber will be a long-term complex task.

Sixth, 4G room sub-systems can be used in a variety of application scenarios, including base stations, small base stations, RRU, MRRU, Femto, direct station, dry release, and Micro Power Amplifier devices, therefore, in the 4G room construction, the application of multiple technical solutions should become a trend. Only in this way can the 4G room sub-system meet users' service experience needs in the best state, 4G business can be better developed.

It can be seen that the creation of a good 4G indoor distribution system is inseparable from the refined construction process. In the 4G era, there are various devices available for network builders. Operators should, according to their actual needs, use the best solution to meet your actual needs.

Three new 4G indoor distribution applications

In the 4G era, the development of mobile broadband networks has brought about changes in the Construction of room and system systems. The requirements for indoor coverage have evolved from signal strength requirement coverage to user business demand coverage. If a large number of users are concentrated in a hotspot area of the city, even if the wireless signal strength displayed by the user terminal is good enough, they cannot use the services they need; or some services are available in some areas, in addition, the usage of some services is poor, so that the user's service experience will be faulty. The actual business needs make the 4G room construction solution more refined. Therefore, in addition to using indoor base stations, RRU and other system devices as the indoor distribution solutions, we can also use some new distinctive 4G indoor coverage solutions based on different indoor scenarios.

　1. Application of Micro-power signal booster

The micro-power signal booster system (also called mobile phone companion) is an effective device in a tiny range that is used to expand the coverage of base stations and fill the coverage "Blind Zone. The device features low costs, no need to transmit network resources, easy installation and maintenance, low impact on network performance, and small gain and micro power, it is an ideal solution for extending the coverage of small indoor areas and can improve the user's awareness of 4G business applications. In the 4G era, if a 40 dB or even lower-gain micro-power signal booster is used, the indoor "point" coverage needs can be effectively solved. For example, if the system is used indoors, as an extension of outdoor base stations or general indoor coverage, it can quickly and effectively improve user experience.

　2. Application of indoor uniform field antenna coverage technology

The indoor uniform field coverage technology is a new indoor micro-antenna directly coupled with a small hole in a common coaxial cable (1/2 inch or 7/8 inch), radiating through an antenna, implement indoor coverage of mobile communication signals. This technology can save a lot of power splitters and signal coupler required for cabling of traditional indoor distribution systems, and does not need to cut short cables or make cable connectors, thus reducing the production and installation processes, it saves a lot of time and money for production and construction. At the same time, due to the reduction of the cable connector, coupler, divider and other devices, the radio wave loss (an average power savings of 50%) of this part of the device is reduced, and the wireless network power utilization is greatly improved, to further achieve the effect of energy saving and emission reduction. It should be noted that the use of this technical solution can also achieve the coverage effect of the leakage induction cable.

3. Indoor Femto Application

Femto, also known as a home base station, is a family base station device that features low transmission power, small-range coverage, and uses a fixed broadband access network as a return request. As a supplement to the 4G macro cell technology, Femto technology enables operators to provide better wireless broadband voice and data services for household users at a lower cost. Its advantages include convenient installation, rapid deployment, and low cost. It is also considered as an indoor coverage solution, especially for scattered and isolated indoor coverage, using the Femto solution features fast deployment, low cost, and high user experience.

With the further expansion of 4G networks, 4G smart terminals will become more and more popular, and various mobile Internet applications will become increasingly mature. The rapid development of mobile Internet puts forward higher demands for mobile communication network coverage. Due to the use of 4G services, indoor network coverage has become the focus of attention of various operators. How to provide more refined indoor coverage and continuously improve user service application awareness, in the future, it will become the focus of 4G indoor distribution. The maturity of a variety of application technologies and solutions ensures the operator's continuous improvement in user experience. system applications that integrate multiple technologies will become a trend in the construction of 4G indoor distribution.