Investigation on Rate Matching and Soft Buffer Splitting for LTE-Advanced Carrier Aggregation

Provided by: Institute of Electrical & Electronic Engineers
Topic: Mobility
Format: PDF
In the LTE-Advanced downlink, Carrier Aggregation (CA) employing multiple Component Carriers (CCs) is an essential technique to achieve a target peak data rate of 1 Gbps. 3GPP RAN WG1 meeting decided to adopt one Transport Block (TB) per CC, where the TB is the unit of channel coding and Hybrid Automatic Repeat reQuest (HARQ). When CA is applied to an LTE-Advanced UE, the soft buffer which is used for HARQ packet combining must be equally split according to the number of CCs, where the soft buffer size is one of the factors to in defining the LTE-Advanced UE categories.

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