Carrier Aggregation (XGP ver. 3.1)
Carrier Aggregation (CA) enables to aggregate two or more Component Carriers (CC) in order to support wider transmission bandwidths up to 100MHz. Note that individual maximum bandwidth of CC is 20MHz.
CA supports for both contiguous and non-contiguous CCs. That is, CA will allow a more flexible use of diverse spectrum allocations available in an operator network.
There are two aggregation type by CCs; one is to aggregate both directions, the other is to aggregate only downlink. Note that the former type needs further study by 3GPP. As for the latter type, there are two aggregation type by numbers of eNB; one is to aggregate downlinks from multiple eNBs, the other is to aggregate downlinks from one eNB.
Table: Example of downlink speed supporting Carrier Aggregation
(Assumption: Ratio of uplink to downlink is 1:3)