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Content for  TS 49.031  Word version:  17.0.0

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1  ScopeWord‑p. 8

The present document specifies procedures and information coding that are needed to define and support the BSSAP LCS Extension (BSSAP-LE). The BSSAP-LE message set is applicable to the following GSM interfaces defined in TS 43.059:
  • Lb interface (BSC-SMLC).
  • Lp interface (SMLC-SMLC).
The present document defines message formats and encoding for BSSAP-LE and the particular subsets of it that are applicable to each of the above interfaces. The present document also defines the support for BSSAP-LE message transfer on each of these interfaces using either ITU-T and ANSI versions of SS7 MTP or IETF M3UA/SCTP and SCCP. Additional requirements for the above interfaces that are applicable to BSSAP-LE are also defined - e.g. usage of BSSAP (as defined in TS 24.008 and TS 48.008) on the Lb interface.

2  ReferencesWord‑p. 8

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
TR 21.905: "Vocabulary for 3GPP Specifications".
TS 23.032: "Universal Geographical Area Description (GAD)".
TS 43.059: "Functional Stage 2 Description of Location Services in GERAN".
TS 44.018: "Mobile radio interface layer 3 specification; Radio Resource Control Protocol".
TS 24.008: "Mobile radio interface layer 3 specification; Core Network Protocols; Stage 3".
TS 44.031: "Location Services (LCS); Mobile Station (MS) - Serving Mobile Location Center (SMLC); Radio Resource LCS Protocol (RRLP)".
TS 44.071: "Location Services (LCS); Mobile radio interface layer 3 Location Services (LCS) specification".
TS 48.006: "Signaling transport mechanism specification for the Base Station Subsystem - Mobile-services Switching Centre (BSS - MSC) interface".
TS 48.008: "Mobile-services Switching Centre - Base Station System (MSC-BSS) interface; Layer 3 specification".
TS 48.031: "Location Services (LCS); Serving Mobile Location Center - Serving Mobile Location Center (SMLC - SMLC); SMLCPP specification".
TS 48.071: "Serving Mobile Location Center - Base Station Subsystem (SMLC-BSS) interface Layer 3 specification".
TS 29.002: "Mobile Application Part (MAP) specification".
TS 23.003: "Numbering, addressing and identification".
ITU-T Recommendation Q.702: "Signalling data link".
ITU-T Recommendation Q.703: "Signalling link".
ITU-T Recommendation Q.704: "Signalling network functions and messages".
ITU-T Recommendation Q.707: "Testing and maintenance".
ITU-T Recommendation Q.711: "Functional description of the signalling connection control part".
ITU-T Recommendation Q.712: "Definition and function of signalling connection control part messages".
ITU-T Recommendation Q.713: "Signalling connection control part formats and codes".
ITU-T Recommendation Q.714: "Signalling connection control part procedures".
ANSI T1.111 (1996): "Signalling System Number 7 - Message Transfer Part".
ANSI T1.112 (1996): "Signalling System Number 7 (SS7) - Signalling Connection Control Part Functional Description".
TIA/EIA/IS-J-STD-036 (2000): "Wireless Enhanced Emergency Services".
TS 48.018: "General Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node (SGSN); BSS GPRS Protocol (BSSGP)".
RFC 1661(07/1994),  STD 51: "The Point-To-Point Protocol (PPP)".
RFC 1662(07/1994),  STD 51: "PPP in HDLC-like Framing".
RFC 2507(02/1999):  "IP header compression".
RFC 1990(07/1994):  "The PPP Multilink Protocol (MP)".
RFC 2686(09/1999):  "The Multi-Class Extension to Multi-Link PPP".
RFC 2509(02/1999):  "IP Header Compression over PPP".
TS 29.202: "SS7 Signalling Transport in Core Network; Stage 3".
Galileo OS SIS ICD/D.0: "Galileo Open Service, Signal In Space Interface Control Document/Draft 0".
Global Navigation Satellite System GLONASS: Interface Control Document Version 5, 2002.
BDS-SIS-ICD-B1I-1.0: "BeiDou Navigation Satellite System Signal In Space Interface Control Document Open Service Signal B1I (Version 1.0)", December 2012.

3  Definitions, abbreviations and symbolsWord‑p. 9

For the purposes of the present document, the definitions, symbols and abbreviations listed in TR 21.905 and TS 43.059 apply.

4  Definition of BSSAP-LEWord‑p. 9

BSSAP-LE is an extension to BSSAP that contains messages and parameters specific to the support of LCS. The following subsets of BSSAP-LE are defined: DTAP-LE, BSSMAP-LE.

4.1  DTAP-LE MessagesWord‑p. 10

DTAP-LE messages are transfered between an SMLC and a Type A LMU and comprise the following individual messages:
The content, encoding and certain procedures asssociated with DTAP-LE messages are defined in TS 44.071.

4.2  BSSMAP-LE MessagesWord‑p. 10

BSSMAP-LE messages are transferred between a BSS and SMLC and comprise the following individual messages:
BSSMAP-LE Positioning Messages:
  • Perform Location Request;
  • Perform Location Response;
  • Perform Location Abort;
  • Perform Location Information.
BSSMAP-LE Information Messages:
  • Connection Oriented Information;
  • Connectionless Information.
BSSMAP-LE General Messages:
  • Reset;
  • Reset Acknowledge.
The content and encoding of BSSMAP-LE messages are defined in the present document.

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