Content for TS 36.305 Word version: 18.0.0

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7.4 General SLmAP Procedures for UE Positioning 7.4.1 SLmAP Procedures 7.4.1.1 Measurement request 7.4.1.2 Measurement Update 7.4.1.3 Measurement Abort
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7.4 General SLmAP Procedures for UE Positioning p. 39

7.4.1 SLmAP Procedures p. 39

SLmAP includes positioning procedures, such as:

Measurement request
Measurement Update
Measurement Abort

7.4.1.1 Measurement request p. 39

The measurement request procedure is used by the E-SMLC to obtain timing measurement for a particular target UE from an LMU.

Copy of original 3GPP image for 3GPP TS 36.305, Fig. 7.4.1-1: Measurement request

Figure 7.4.1-1: Measurement request
(⇒ copy of original 3GPP image)

Step 1.

The E-SMLC sends a measurement request to the LMU. The measurement request identifies the UE to be positioned and contains the data (including SRS transmission configuration) needed to obtain the measurements.

Step 2.

In response to step 1, the LMU transfers UL RTOA measurements to the E-SMLC.

7.4.1.2 Measurement Update p. 39

The Measurement Update procedure is used by the E-SMLC to inform the LMU of a change in the UE SRS transmission configuration during an ongoing SLmAP measurement reporting transaction.

Copy of original 3GPP image for 3GPP TS 36.305, Fig. 7.4.1.2-1: Measurement update

Figure 7.4.1.2-1: Measurement update
(⇒ copy of original 3GPP image)

Step 1.

An SLmAP Measurement reporting transaction is ongoing between the E-SMLC and LMU.

Step 2.

The E-SMLC determines that the SRS transmission configuration data previously sent to the LMU is no longer valid. The E-SMLC sends a Measurement Update to the LMU containing the new SRS transmission configuration data. The E-SMLC shall not send a Measurement Update after receiving a Measurement Response from the LMU.

Step 3.

The LMU continues UL RTOA measurements using the updated SRS configuration.

7.4.1.3 Measurement Abort p. 40

The measurement abort procedure is used by the E-SMLC to abort an ongoing SLmAP measurement reporting transaction.

Copy of original 3GPP image for 3GPP TS 36.305, Fig. 7.4.1.3-1: Measurement abort

Figure 7.4.1.3-1: Measurement abort
(⇒ copy of original 3GPP image)

Step 1.

An SLmAP Measurement reporting transaction is ongoing between the E-SMLC and LMU.

Step 2.

The E-SMLC determines that the transaction should be aborted (e.g. due to UE detach or inter-MME handover). The E-SMLC sends a measurement abort to the LMU and the ongoing SLmAP Measurement reporting transaction is abandoned. The E-SMLC shall not send a Measurement Abort after receiving a Measurement response from the LMU.