Section: A.24 Monitoring of SCell scheduling on PUCCH in Carrier Aggregation
Content: In the deployment scenarios for carrier aggregation as depicted in 3GPP 36.300 [12], the number of possible SCell per PCell can be multiple and not fixed. So the PUCCH resource for the Scell scheduling needs to be properly allocated, because: - Over-dimensioned PUCCH causes high overhead and results in reduced UL throughput is (in general UL is not used efficiently); - Under-dimensioned PUCCH will result in reduced DL throughput (if no PUCCH format 1bCS or format 3 ACK/NACK resource is available, PDSCH cannot be allocated by the PDCCH for the SCell(s) and the UE cannot be allocated resources on its SCell(s)). Thus, the SCell scheduling success/blocking rate on PUCCH needs to be monitored for evaluation of control channel usage in CA. When needed OAM can also provide the guidance or take action to the eNB to optimize the PUCCH dimension for CA.