Abstract
LTE-Advanced systems support multi-carrier with non-contiguous, asymmetric and cross band-class operations to ensure full flexibility of the spectral deployment. The component carriers employed in Spectrum Aggregation need not to be adjacent and symmetric. However they could be in different frequency bands. The eNodeB or UE in the LTE-Advanced systems that adopts Spectrum Aggregation simultaneously transmit and receive data using non-adjacent carriers. The component carriers in different frequency bands are aggregated into a wider bandwidth, LTE-Advanced UE can share the overall wider bandwidth. Each user can use RBs of all the component carriers simultaneously. There are two possible scheduler structures for Spectrum Aggregation. Priority based decision require proposed modification in joint queue scheduler. This research paper aimed to focus on thorough investigation of carrier aggregation, scheduler structures and finally ends at a conclusion by proposing a new idea of an improved scheduler structure for carrier aggregation.
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