It still happens that indoor capacity is provided by outdoor base station. This could be compared to a situation of providing light into the building by the use of street lamps and not the internal (indoor) light system. The signal from outdoor base stations does not penetrate well indoors as most of the modern buildings are equipped with low-emission glass, which stops radio waves. There exist solutions which, in a way, are miniaturizing the outdoor base station concept and providing it indoors, such as small cells or distributed antenna systems (DAS). They work good but lack the flexibility and scalability and hence are not cost efficient.
The use of virtualized network software running on COTS servers and using low-cost / low-power Radio Heads is meant to provide capacity (and coverage) indoors in a cost-efficient manner. Not only the EMF problem (electromagnetic field) does not exist (too little transmit power) but also the spectrum can be reused very aggressively thanks to IS-Wireless’ proprietary algorithms for radio resource management. Moreover, installation is truly plug and play, reusing the existing telco infrastructures (such as Ethernet cabling and racks) and capacity can be added in a flexible way, whenever and wherever needed. Through the inherent support of multi-tenancy, the same network software and hardware can support multiple operators, yet having logically separable networks.
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