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3GPP Glossaries

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Interfaces / Reference Points

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|   Lb   |   Le   |   Lgd   |   Lp   |   Lr   |   LTE Uu   |

 


between  BSC  and  SMLC

specified from  Rel-4
Source:   TS 23.002, clause 6a.3.5 

In GERAN, a SMLC supports positioning via signalling on the Lb interface to the BSC serving the target MS. Signalling on this interface uses BSSAP-LE, which is specified in TS 49.031.

In UTRAN, the Lb interface is not standardized, the SMLC functionality is included in SRNC.

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between  GMLC  and  External LCS Client

specified from  Rel-4
Source:   TS 23.002, clause 6a.3.8 

The Le interface is used by the external LCS client to retrieve location information from the LCS server. Signalling on this interface may use the OMA Mobile Location Protocol (MLP) and Open Service Access Application Programming Interface (OSA-API), TS 29.198.

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between  GMLC  and  SGSN

specified from  Rel-12
Source:   TS 23.002, clause 6a.3.15 

Lgd is the interface that is used by the GMLC to convey a location request to the SGSN currently serving a particular target UE whose location was requested. The interface is also used by the SGSN to return location results to the GMLC. This interface is applicable only for an SGSN supporting EPS based interfaces and protocols. The Lgd interface is defined in TS 29.172.

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between  SMLC  and  SMLC

specified from  Rel-4
Source:   TS 23.002, clause 6a.3.6 

In GERAN, a SMLC may support the Lp interface to enable access to information and resources owned by another SMLC. Signalling on this interface uses BSSAPP-LE, which is defined in TS 49.031, and SMLCPP, which is specified in TS 48.031.

In UTRAN, the SMLC functionality is included in SRNC and the Iur interface shall include the Lp interface type of functionality.

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between  GMLC  and  GMLC

specified from  Rel-6
Source:   TS 23.002, clause 6a.3.11 

The Lr interface is used by the GMLC to communicate with other GMLCs. Signalling on this interface may use the OMA Roaming Location Protocol (RLP).

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between  UE  and  E-UTRAN

 

See E-UTRAN Uu.

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