Intra-band, contiguous

Intra-band carrier aggregation refers to the aggregation of two or more LTE channels within the one LTE Frequency Band. Contiguous refers to two or more adjacent carriers forming one single block of radio spectrum, allowing the network to treat the aggregated band as a single enlarged channel.

This form of LTE-A carrier aggregation is the simplest, where often little to no hardware changes are necessary to implement.