A network monitoring device monitors at least one tap point corresponding to a network interface between User Equipment (UE) and one or more additional nodes in the communication network, detects one or more transactions at the at least one tap point corresponding to the network interface with each transaction including request data and response data. The network monitoring device further determines a time associated with the request data and a time associated with the response data for each transaction, determines a delay time for each transaction for the at least one tap point by a difference between the time associated with the request data and the time associated with the response data, assigns the delay time for each transaction to one or more a predefined time ranges, and increments a count corresponding to the one or more predefined time ranges when the delay time is assigned.