For 5G the same options of unlicensed, LAA, and shared spectrum will be available, and their use is expected to grow. These unlicensed methods are all used predominately with small cells. Table 4.6.2 gives some typical examples of cell dimensions for a sub-6 GHz macro cell, a sub-6 GHz small cell, and an nmWave small cell. The use of licensed or unlicensed spec- trum typically doesn't impact the cell dimensioning SO is not included. 4.6.4.4 Operational Models The final variant for small cells is the relationship between a mobile network operator (MNO) and the small cell. For macro cells this relationship is clear - a macro cell is owned and operated by an MNO. However, for small cells with their wide variety of deployment scenarios this relationship is not SO clear cut. 4 NG-RAN Architecture The most common form of small cell is the same as macro cells, with the MNO both owning and operating the small cell. Alternate options are a private network and neutral host architectures. Private networks are where the small cell is owned and operated by someone other than a mobile operator. Typical scenarios might be an indoor network inside a factory, or an out- door setup to provide a service at a remote outdoor location, such as a mining facility. The purpose of this type of network is to provide a service to a specific set of UEs for opera- tional reasons. Therefore, in this type of network only specific permitted UEs will be able to connect, with no roaming from other networks. It is worth noting that the network slicing mechanism introduced in 5G is another method of operating a private network, where a mobile operator is still involved. Neutral host is a more common and growing sector for small cell deployments and is where one small cell is used to provide a service for multiple mobile networks. This segment has developed from both the challenges of providing indoor 5G coverage and lack of suitable site locations from small cells. The neutral host small cell may operate one cell providing a service for all mobile n