UpdateVcsgLocationArg Message
This procedure is used by the VLR or SGSN to register the MS in the CSS when the VPLMN supports Autonomous CSG Roaming
and the HPLMN has enabled Autonomous CSG Roaming in the VPLMN and the MS has requested an initial attach or a location area procedure
or a routing area procedure to a CSG cell and the VLR or SGSN has not yet registered the MS in the CSS. The MAP_UPDATE_VCSG_LOCATION
service is a confirmed service
Reference: TS 29.002-f30