8.19 Location Reporting Control

25.4133GPPRelease 17TSUTRAN Iu interface Radio Access Network Application Part (RANAP) signalling

8.19.1 General

The purpose of the Location Reporting Control procedure is to allow the CN to request information on the location and optionally velocity of a given UE. The procedure uses connection oriented signalling.

8.19.2 Successful Operation

Figure 21: Location Reporting Control procedure. Successful operation.

The CN initiates the procedure by sending a LOCATION REPORTING CONTROL message.

The Request Type IE shall indicate to the serving RNC whether:

– to report directly;

– to stop a direct report;

– to report periodically;

– to stop periodic reporting;

– to report upon change of Service area, or

– to stop reporting at change of Service Area.

If reporting upon change of Service Area is requested, the Serving RNC shall report whenever the UE moves between Service Areas. For this procedure, only Service Areas that are defined for the PS and CS domains shall be considered.

The Request Type IE shall also indicate what type of location information the serving RNC shall report. The location information is either of the following types:

– Service Area Identifier, or

– Geographical area, including geographical coordinates with or without requested accuracy. If the Vertical Accuracy Code IE is included, the Accuracy Code IE in the Request Type IE shall be present. The Accuracy Code IE shall be understood as the horizontal accuracy code.

A request for a direct report or for periodic reporting can be done in parallel with having an active request to report upon change of Service Area for the same UE. The request to report upon change of Service Area shall not be affected by this.

Any of the Vertical Accuracy Code IE, Response Time IE, Positioning Priority IE, Client Type IE or Periodic Location Info IE shall be included according to the following rules:

– Vertical Accuracy Code shall be included, if available, in connection with Geographical Area,

– Response time shall be included, if available, in connection with request for start of direct reporting of Geographical Area,

– Client type shall be included in connection with request for start of direct reporting of Geographical Area and, if available, in request for direct reporting of SAI or periodic reporting,

– Positioning Priority shall be included, if available, in connection with request for start of direct reporting or in connection with request for start of reporting upon change of Service Area,

– Periodic Location Info shall be included in connection with a request for start of periodic reporting of Geographical Area.

When no Positioning Priority IE is included, the RNC shall consider the request as if "Normal Priority" value had been received.

When no Response Time IE is included, the RNC shall consider the request as if "Delay Tolerant" value had been received.

Interaction with Relocation and Enhanced Relocation:

The order to perform location reporting at change of Service Area is lost in UTRAN at successful Relocation of SRNS. If the location reporting at change of Service Area shall continue also after the relocation has been performed, the Location Reporting Control procedure shall thus be re-initiated from the CN towards the future SRNC after the Relocation Resource Allocation procedure or the Enhanced Relocation procedure has been executed successfully.

8.19.3 Abnormal Conditions

Not applicable.