3 Definitions and abbreviations
25.4533GPPRelease 17TSUTRAN Iupc interface Positioning Calculation Application Part (PCAP) signalling
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Stand-Alone SMLC (SAS): logical node that interconnects to the RNC over the Iupc interface via the PCAP protocol.
An SAS performs the following procedures:
– provide GNSS (i.e. GPS or GANSS (e.g. Galileo)) related data to the RNC;
– performs the position calculation function based upon UE Positioning measurement data;
– in SAS centric mode, selects the positioning method and controls the positioning procedure.
Elementary Procedure: PCAP consists of Elementary Procedures (EPs).
An Elementary Procedure is a unit of interaction between the RNC and the SAS. An EP consists of an initiating message and possibly a response message. Two kinds of EPs are used:
– Class 1: Elementary Procedures with response (success or failure).
– Class 2: Elementary Procedures without response.
For Class 1 EPs, the types of responses can be as follows:
Successful:
– A signalling message explicitly indicates that the elementary procedure successfully completed with the receipt of the response.
Unsuccessful:
– A signalling message explicitly indicates that the EP failed.
Class 2 EPs are considered always successful.
Information Exchange Context: Information Exchange Context is created by the first Information Exchange Initiation Procedure initiated by the RNC and requested from the SAS.
The Information Exchange Context is deleted after the Information Exchange Termination or the Information Exchange Failure procedure when there is no more Information Exchange to be provided by the RNC to the SAS. The Information Exchange Context is identified by an SCCP connection as, for Information Exchanges, only the connection oriented mode of the signalling bearer is used.
Positioning Initiation Context: In the SAS centric mode of operation each positioning request is assigned a unique logical connection identity, i.e., SCCP Source and Destination Local Reference numbers.
RNC Centric Mode of Operation: The RNC determines, initiates and controls the positioning method to be used for each positioning request.
SAS Centric Mode of Operation: The SAS determines, initiates and controls the positioning method to be used for each positioning request.
Positioning Event: The activity associated with the positioning of a UE resulting from the reception of UE positioning request from the CN.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
A-GANSS Assisted GANSS
A-GPS Assisted GPS
ASN.1 Abstract Syntax Notation One
BDS BeiDou Navigation Satellite System
CN Core Network
CRNC Controlling RNC
DBDS Differential BDS
DGANSS Differential GANSS
DGPS Differential GPS
ECEF Earth-Centered, Earth-Fixed
EGNOS European Geostationary Navigation Overlay Service
EP Elementary Procedure
FDD Frequency Division Duplex
GAGAN GPS Aided Geo Augmented Navigation
GANSS Galileo and Additional Navigation Satellite Systems
GLONASS GLObal’naya NAvigatsionnaya Sputnikovaya Sistema (Engl.: Global Navigation Satellite System)
GNSS Global Navigation Satellite System
GPS Global Positioning System
ICD Interface Control Document
MBS Metropolitan Beacon System
MSAS Multi-functional Satellite Augmentation System
OTDOA Observed Time Difference Of Arrival
PCAP Positioning Calculation Application Part
PRC Pseudorange Correction
QZSS Quasi-Zenith Satellite System
RNC Radio Network Controller
RNS Radio Network Subsystem
RRC Radio Resource Control
SAS Stand-Alone SMLC
SBAS Satellite Based Augmentation System
SCCP Signalling Connection Control Part
SIB System Information Block
SMLC Serving Mobile Location Center
SRNC Serving RNC
SV Space Vehicle
TDD Time Division Duplex
TOD Time of Day
TOW Time of Week
UE User Equipment
UTC Universal Coordinated Time
U-TDOA Uplink Time Difference Of Arrival
UTRAN Universal Terrestrial Radio Access Network
WAAS Wide Area Augmentation System
WLAN Wireless Local Area Network