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Notas de Aplicação
Overview
Carrier aggregation (CA), introduced in the 3GPP Release 10 standard, is an important new feature of LTE-Advanced. Carrier aggregation enables the combining of multiple LTE carriers into a larger, singlechannel bandwidth to increase data rates and throughput. For operators with limited or fragmented spectrum allocations, carrier aggregation is a way to keep pace with the growing data demands on their networks.
A goal of LTE-Advanced is to preserve backward compatibility with earlier LTE releases. For that reason, CA in LTE-Advanced is based on the carriers first defined for 3 GPP Release 8. This allows existing LTE devices to continue operating properly but enables new devices to support the higher data throughput that CA makes possible. The LTE carriers defined in Release 8 are called component carriers (CCs). Component carriers can use any of the 3GPP-defined LTE bandwidths—1.4, 3, 5, 10, 15, or 20 MHz—and up to five CCs can be combined for a theoretical maximum of 100 MHz of bandwidth.
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