Detailed call records for voice over LTE calls

A computer communicatively connected to an LTE wireless communication network, and operative to generate a Detailed Call Record (DCR) for a Voice over LTE (VoLTE) call in the LTE network, characterized by:

• communication circuits operative to exchange data with one or more LTE network nodes;
• and
• processing circuitry operatively connected to the communication circuits, and operative to:
• for each leg of the call, collect network data associated with the call from all involved domains, using domain-specific identifiers associated with a subscriber;
• for each leg of the call, pre-correlate the collected data by mapping the domain-specific identifiers to a common identifier associated with a subscriber;
• and
• correlate the data across all legs of the call, using the common identifiers, to generate a DCR including all events, across all domains, for all legs of the call, wherein the processing circuit correlates the data across all legs of the call, using the common identifier, to generate a DCR by:
• extracting events related to voice calls by determining the start and end timestamp of the call for each leg, and selecting every event between the timestamps;
• assigning an IMS Charging Identifier (ICID) to voice call events;
• and
• after detecting a termination message for the last leg of the call, assembling the extracted and identified events for each leg into a DCR.

A non-transitory computer-readable medium containing program instructions which, when executed on processing circuitry communicatively coupled to an LTE wireless communication network, are operative to cause the processing circuitry to generate a Detailed Call Record (DCR) for a Voice over LTE (VoLTE) call in the LTE network by performing the steps of:

• for each leg of the call, collecting network data associated with the call from all involved domains, using domain-specific identifiers associated with a subscriber;
• for each leg of the call, pre-correlating the collected data by mapping the domain-specific identifiers to a common identifier associated with a subscriber;
• and
• correlating the data across all legs of the call, using the common identifiers, to generate a DCR including all events, across all domains, for all legs of the call, wherein correlating the data across all legs of the call, using the common identifier, to generate a DCR by:
• extracting events related to voice calls by determining the start and end timestamp of the call for each leg, and selecting every event between the timestamps;
• assigning an IMS Charging Identifier (ICID) to voice call events;
• and
• after detecting a termination message for the last leg of the call, assembling the extracted and identified events for each leg into a DCR.

An apparatus communicatively connected to an LTE wireless communication network, and operative to generate a Detailed Call Record (DCR) for a Voice over LTE (VoLTE) call in the LTE network, the apparatus adapted to:

• for each leg of the call, collect network data associated with the call from all involved domains, using domain-specific identifiers associated with a subscriber;
• for each leg of the call, pre-correlate the collected data by mapping the domain-specific identifiers to a common identifier associated with a subscriber;
• and
• correlate the data across all legs of the call, using the common identifiers, to generate a DCR including all events, across all domains, for all legs of the call, wherein the apparatus is adapted to correlate of the data across all legs of the call, using the common identifier, to generate a DCR by:
• extracting events related to voice calls by determining the start and end timestamp of the call for each leg, and selecting every event between the timestamps;
• assigning an IMS Charging Identifier (ICID) to voice call events;
• and
• after detecting a termination message for the last leg of the call, assembling the extracted and identified events for each leg into a DCR.