Smart cloth's 3G indoor coverage capacity benefits

The 3G era has opened the door to China, and end users hope to get faster and better wireless network communication from the third-generation mobile communication network. High speed is a major advantage of the third-generation mobile communication network, but most high-rate services will be used by end users in the static state. That is to say, most end users will use these services in coffee shops, restaurants, offices, hotels, shopping centers, bars, pub, Metro, gymnasiums, train stations, airports, and indoor homes. This is because, on the one hand, outdoor users are rarely in a static state. They are always in a shaking state due to their movements, which is not conducive to watching high-definition videos or webpages. In addition, the outdoor environment is usually not ideal, for example, noise interference, rainy days, bright sun, and strong winds make most users enjoy the network life brought about by wireless broadband in a relatively comfortable room.

To attract more users, it is necessary for operators to deploy dedicated indoor coverage systems in key locations.

Improve network capacity with High Efficiency

The dedicated indoor coverage system can reduce the load on the macro cellular network and achieve the following effects:

1) The dedicated indoor coverage system can reduce the load of macro cells by reducing the downstream power, thus releasing more system capacity for the outdoor areas. If most or all indoor users in a residential area use a dedicated indoor coverage system, the average power required to serve other users in the macro community will also be reduced accordingly. As we know, the smaller the power the system assigns to each user, the more users it can serve. The actual capacity increase also depends on the location of indoor users in the residential area. For indoor users with high path loss (that is, those located at the residential boundary), the best effect is to introduce a dedicated indoor coverage system.

2) The indoor community and macro cellular networks are isolated from each other to reduce mutual interference. Therefore, the indoor area can provide a larger capacity than the outdoor area. In CDMA-based systems, the cell capacity depends on the power required to provide services to each user in the cell, and interference from other cells: the smaller the interference, the larger the capacity. Mutual isolation can minimize interference. The walls and other building structures help isolate specialized indoor residential areas, thus reducing mutual interference between residential areas. In addition, the orthogonal design of the indoor coverage system is better. Therefore, the capacity of a private indoor community is usually two to three times that of a non-independent ordinary macro community. Indoor residential areas that do not use soft switching technology to switch to other residential areas can also provide larger capacity.

The actual capacity increase depends on many factors, such as the number of indoor users served by the private indoor community, the location of users and buildings, traffic characteristics, and the penetration loss caused by the building walls and structures. In many cases, the capacity can be greatly increased. Theoretical calculations show that the capacity of some parts of the cellular network can be increased by 200% to 600% if some users provide services in a dedicated residential area. The measurement results in the actual network also prove that increasing the indoor coverage system can increase the network capacity by at least 400%, and reduce the cost per user-including the indoor coverage system-by 67%.

Improve economic efficiency in multiple aspects

Because of this, providing good indoor coverage is crucial to attracting and retaining mobile users. Generally, the coverage of macro cellular networks can be extended to buildings, but it still needs to be supplemented by a dedicated indoor coverage system. Higher data capacity and the ability of third-generation networks to provide high-speed data services increase the demand for cellular networks. As users have high expectations for third-generation communication services, when introducing these new services, we must ensure that third-generation communication services can also be used wherever second-generation communication services can be used. However, many third-generation networks focus on providing good outdoor coverage rather than indoor coverage. Therefore, the number of users of the third-generation communication business in early broadband code division multiple access (WCDMA) is much lower than that of the second-generation communication business.

In addition to ensuring higher service quality (QoS), the dedicated indoor coverage system also allows operators to win more roaming users, because most roaming users enable the automatic selection of public land mobile network (PLMN) function, that is, when they lose connection with a common network, their mobile phone will automatically select the highest available PLMN. Therefore, carriers who have deployed dedicated indoor coverage systems in airports, railway stations and other key places can win these roaming users with high value.

Deploying a dedicated indoor coverage system in a CDMA network can also reduce the load on the Macro-cell system and increase the total capacity of the system. In other words, carriers can continue to use existing networks to attract more users with the minimum investment. The increase in capacity means that operators can delay the time needed to split the community, greatly reducing the cost of network resizing. It is particularly worth mentioning that the economic benefits of deploying a dedicated indoor coverage system in the third generation CDMA network are far greater than those of deploying these systems in the second generation network.

The solution for deploying the indoor coverage system in the WCDMA network adopts distributed wireless base station (DRS) and passive Distributed Antenna System (DAS ). These solutions reduce the overall cost by reducing transmission costs, increasing relay capacity, and sharing RBS devices.

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