The document lists various counters related to carrier aggregation (CA) in LTE networks. The counters observe metrics such as the number of UEs using CA, physical resource blocks occupied by CA UEs, traffic volume and time for downlink transmissions to CA UEs, handover success rates for CA UEs, attempts and success rates for adding or removing secondary cells for CA, and traffic volume and duration on primary and secondary cells for CA UEs. Formulas are provided for calculating drop rates, success rates, and other metrics from the counter values.