w the link budget with LTE is clearly better and allows having fewer nodes than Wi-Fi for a given area for reaching the same capacity that a Wi-Fi network would provide. This allows considering trade-off in deployment between the total network capacity and the number of LTE nodes being deployed for the unlicensed band. 10.8 Coexistence Performance Important part of the deployment is coexistence with Wi-Fi and other LTE networks on the unlicensed bands. When running the LTE and Wi-Fi on the same 20 MHz carrier, both networks should use LBT solution to ensure that both systems can coexist smoothly. There is always an impact when additional interference is created with additional transmitters, regardless of whether those additional transmitters are using LTE or Wi-Fi or some other technology. Thanks to the advanced radio features, the use of LTE in a co-channel scenario with another LTE network results in smaller overall capacity loss than would be the case with two Wi-Fi networks. The performance was studied in the office environment with two corridors and LTE Unlicensed = LTE node = Wi-Fi node ((a)) Figure 10.8 Example environment used in the simulations considering a single floor only. The impact and additional capacity from the licensed band LTE network were not considered in the environment provided in Figure 10.8. In Figure 10.9, the performance is illustrated with two different networks operating on the same 20 MHz channel. In the first case, the two different networks are using LTE technology while on the other case the two different networks are using Wi-Fi. For higher loads the relative performance of LTE is better. Especially for the first-phase LTE deployments on unlicensed bands it is also important to have good performance when the other network on the same channel is a Wi-Fi network. In Figure 10.10 the downlink performance is shown with two independent networks of different technology sharing the same 20 MHz channel. As shown in Figure 10.10, when placed on the same 20 MHz channel without specific co