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).


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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