When the location information present within an xIRI includes the cell identity, the MDF2 that receives the xIRI may retrieve the cell site information and associated cell radio related information for that cell from a CSP database and deliver the same to the LEMF either within the IRI message generated from the received xIRI or in a separate IRI message containing the MDFCellSiteReport record.
For each intercept, if the MDF2 reports the cell site information, then it shall provide such information at least on the initial appearance of the cell identity in the related xIRI.
If the reported cell site information is for a cell with mobility, the MDF2 should report the current information (e.g. physical location of the cell) with every related xIRI.
The cell site information is encoded as the cellSiteInformation ASN.1 parameter and delivered either within the location field of an IRI message carrying the respective cell identity, or in a stand-alone IRI message containing the MDFCellSiteReport record.
The cell radio related information is encoded as the cellRadioRelatedInformation ASN.1 parameter and delivered with the cell information parameter.
The MDF2 shall use the IRI message containing the MDFCellSiteReport record to convey cell site information and cell radio related information retrieved asynchronously with the sending of the IRI message that caused the retrieval. The MDFCellSiteReport record shall be delivered as an IRI REPORT (see ETSI TS 102 232-1  clause 5.2.10
) and allocated the same CIN, if any, as the IRI message that caused the retrieval.
When the cell site information and cell radio related information are readily available at MDF2 or are retrieved synchronously (i.e. blocking the sending of the IRI message until the retrieval is complete), the cell site information shall be conveyed within the location field of the IRI message that caused the retrieval.
The cell site information and associated cell radio related information for multiple cell identities can be delivered to the LEMF within an IRI message that carries the respective cell identities or within the IRI message containing the MDFCellSiteReport record (see Annex A
The MDF2 generating the IRI message MDFCellSiteReport shall set the Payload Direction field in the PDU header to not applicable (Direction Value 5, see ETSI TS 103 221-2  clause 5.2.6
The MDFCellSiteReport consists of a sequence of cellInformation as described in the following tables.