BSSAPLE
Base Station System Application Part LCS Extension
BSSAP-LE is an extension to BSSAP (Base Station System Application Part) that contains messages and parameters specific in the support of LCS (Location Services). Two subsets of BSSAP-LE exist: BSSMAP-LE (Base Station System Mobile Application Part – LCS Extension) and DTAP-LE (Direct Transfer Application Part – LCS Extension).