5 Functions of the SLm interface protocol

36.4563GPPEvolved Universal Terrestrial Radio Access Network (E-UTRAN)Release 17SLm interface general aspects and principlesTS

5.1 General

The following sections describe the functions to fulfil the SLm interface capabilities.

5.2 SLm link management function

The SLm signalling link management function provides a reliable transfer of the signalling between LMU and E-SMLC.

5.3 SLm interface management function

The error indication function is used by the LMU (respectively the E-SMLC) to indicate to the E-SMLC (respectively the LMU) that a logical error has occurred.

The reset procedure is used to initialize the peer entity after node setup and after a failure event has occurred. This procedure can be initiated by the E-SMLC or the LMU. The information about the LMU capabilities after a reset is preserved in the E-SMLC.

The SLm Setup procedure allows the exchange of application level data, e.g. capability, needed for the LMU and E-SMLC to interoperate correctly on the SLm interface. This procedure is originated by the LMU only and initiates the setup of the SLmAP contexts to the E-SMLC.

5.4 SLm location function

The location function is used by the E-SMLC to request the LMU to perform UL RTOA measurements. The LMU reports UL RTOA measurements back to the requesting E-SMLC.