Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Location Services (LCS); Evolved Packet Core (EPC) LCS Protocol (ELP) between the Gateway Mobile Location Centre (GMLC) and the Mobile Man
The present document specifies the procedures and information coding for the EPC LCS Protocol (ELP) that is needed to support the location services in E-UTRAN@ UTRAN and GERAN. The ELP message set is applicable to the SLg interface between the MME and the GMLC and the Lgd interface between the SGSN and the GMLC. ELP is developed in accordance to the general principles stated in 3GPP TS 23.271 [2].