Instead, if we would use carrier aggregation, it would be possible to increase the user data rate as it would be possible to communicate multiple carriers to the same user (more bandwidth/spectrum is used). Going back to operating a base station and user equipment (UE): If we take the example that we are operating a base station without CA, this would yield the possibility to deliver a certain data rate to a user over a single carrier. The last case would resemble the case of carrier aggregation. We now have two heaters in the room and we can then further increase the temperature in the room. In order to further increase the temperature in the room, we would need to place an additional heater in the room. The single heater is turned up as much as possible, but it is still too cold. To start with, we have only a single heater in the room, i.e. As a technique, carrier aggregation takes advantage of the fact that assigning more spectrum (or bandwidth) to the user, increases the user data rate.įor example, an analogy is that we would like to heat a room. Carrier aggregation (CA) is used in LTE-Advanced to increase the throughput for the user.
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