10 Information storage

3GPP43.059Functional stage 2 description of Location Services (LCS) in GERANRelease 16TS

This clause describes information storage structures that are mandatory (M), conditional (C) or optional (O) for LCS in GERAN, and the recovery and restoration procedures needed to maintain service if inconsistencies in databases occur and for lost or invalid database information.

10.1 SMLC

Common Data

Table 2 holds permanent BTS data:

Table 2: Permanent SMLC Data for a BTS

Permanent BTS Data Item

Status

Description

BTS position

M

BTS position (latitude/longitude) of the Serving BTS

CGI

M

Cell global identity.

BSIC

M

Base station identity code.

BCCH

M

Frequency of the broadcast carrier.

The SMLC holds data for its associated LMUs. The main key to LMU data in the SMLC is the IMSI for a Type A LMU and a cell site identifier for a Type B LMU. LMU data provides the location capabilities of the LMU (e.g. which location and assistance measurements are supported). The following permanent data shall be administered for any LMU.

Table 3: Permanent SMLC Data for an LMU

Permanent LMU Data Item

Status

Description

Type of LMU

M

Indicates if LMU is Type A or Type B

IMSI

C

Main key to data for a Type A LMU. Not applicable to a Type B LMU

LAC + CI

C

Cell site identifier to address a Type B LMU. Not applicable to a Type A LMU.

Signaling Access

M

Information regarding signalling access to the LMU including the following:

– address of default serving BSC

– SS7 link set to serving BSC (or to an intermediate STP)

Serving Cell

M

Identity of the cell in which the LMU is physically located

Geographic location

C

Latitude/longitude coordinates

Storage of coordinates is mandatory for E-OTD if an LMU is not co-located with a BTS

Position measurement functions

O

List of supported position measurements

For each type of position measurement, a list of associated capabilities – details are outside the scope of the present document

Assistance measurement functions

O

List of supported assistance measurements

For each type of assistance measurement, a list of associated capabilities – details are outside the scope of the present document

Diagnostic functions

O

List of supported diagnostic functions – details are outside the scope of the present document

The SMLC also holds the following temporary data for each LMU for which there has been any previous signalling interaction.

Table 4: Temporary SMLC Data for an LMU

Temporary LMU Data Item

Status

Description

Position Measurements

O

Ongoing and scheduled position measurements ordered in the LMU by the SMLC – details are outside the scope of the present document

Assistance Measurements

O

Ongoing and scheduled assistance measurements ordered by the SMLC – details are outside the scope of the present document

O&M Activities

O

Ongoing and scheduled O&M activities ordered in the LMU by the SMLC – details are outside the scope of the present document

An LMU contains no mandatory data regarding its associated SMLC. An LMU shall contain permanent data regarding its measurement and O&M capabilities and may contain pre-administered data regarding location assistance measurements and O&M activities that the LMU is to perform without the need for any command from the SMLC. The content of such location measurement and O&M related data is outside the scope of the present document.

10.2 Recovery and Restoration Procedures

The LCS recovery and restoration procedures allow temporary data to be recovered or re-initialized following loss or corruption of data, such that normal LCS service is rapidly restored and inconsistency between the data held by different LCS network elements is removed. For a full description, refer to 3GPP TS 23.007 [4].

Annex A (informative):
Change history

Change history

Date

TSG
GERAN#

TSG Doc.

CR

Rev

Subject/Comment

Old

New

2001-04

04

GP-010942

Version for Release 4

4.0.0

2001-06

05

GP-010988

001

LCS error handling (Inter-BSC Handover)

4.0.0

4.1.0

2001-06

05

GP-011308

007

Geographic Shape Restriction

4.0.0

4.1.0

2001-08

06

GP-011935

010

2

Correct Faulty References to the BSSAP-LE and RR Specifications

4.1.0

4.2.0

2001-08

06

GP-011905

011

Update of GERAN LCS Stage 2 for Release 5

4.2.0

5.0.0

2001-11

07

GP-012836

012

3

Inter NSE Cell Change for LCS for GPRS

5.0.0

5.1.0

2001-11

07

GP-011993

014

Clean-up CR for LCS for GPRS

5.0.0

5.1.0

2001-11

07

GP-011998

016

Correction of Inconsistent Text

5.0.0

5.1.0

2001-11

07

GP-012210

018

Error Handling for E-OTD and GPS

5.0.0

5.1.0

2001-11

07

GP-012822

019

1

Use of TOM signaling to support LCS for Gb Mode

5.0.0

5.1.0

2001-11

07

GP-012280

021

Editorial revision definition section for TS 43.059

5.0.0

5.1.0

2002-02

08

GP-020039

023

TOM Protocol Header Definition for LCS for GPRS

5.1.0

5.2.0

2002-02

08

GP-020437

025

1

Informing an SMLC of a change in the LAC for LCS using BSSLAP

5.1.0

5.2.0

2002-02

08

GP-020493

026

2

Stage 2 Updates for Iu Mode LCS

5.1.0

5.2.0

2002-04

09

GP-021215

027

1

Corrections to LCS Stage 2 for Release 5

5.2.0

5.3.0

2002-04

09

GP-020621

028

Inclusion of PTP BVCI for Positioning Procedure over the Gb Interface

5.2.0

5.3.0

2002-04

09

GP-021127

030

1

Correction of timing when SMLC enters LOCATION state

5.2.0

5.3.0

2002-04

09

GP-021225

031

2

LCS Stage 2 Corrections

5.2.0

5.3.0

2002-04

09

GP-020998

032

Correction of MS-SMLC Information Transfer Description

5.2.0

5.3.0

2003-04

14

GP-031064

037

8

Inclusion of U-TDOA location method

5.3.0

6.0.0

2003-06

15

GP-031657

038

1

Inclusion of RR Procedures and enhancement of the Reset procedure for U-TDOA

6.0.0

6.1.0

2003-11

17

GP-032501

042

Inclusion of Channel Mode Modify RR Procedures for U-TDOA calls

6.1.0

6.2.0

2004-04

19

GP-040634

043

3

Removal of emergency services client type restriction for the U-TDOA location method

6.2.0

6.3.0

2004-04

19

GP-040683

050

1

Alignment of GERAN location request procedure to UTRAN

6.2.0

6.3.0

2004-11

22

GP-042330

051

9

Inclusion of PS functionality for U-TDOA location method

6.3.0

6.4.0

2004-11

22

GP-042701

054

1

Correction to add U-TDOA reference to Cell Change for the PS Domain sub-clause

6.3.0

6.4.0

2005-04

24

GP-050766

055

Enabling the Providing of Velocity

6.4.0

7.0.0

2005-06

25

GP-051778

059

1

Providing IMSI and IMEI to the SMLC in positioning procedures

7.0.0

7.1.0

2006-04

29

GP-060928

0064

1

Correction of State Update Procedure

7.1.0

7.2.0

2006-04

29

GP-060870

0068

1

Inclusion of Support for SIGTRAN on Lb-interface

7.1.0

7.2.0

2006-04

29

GP-060984

0069

4

Introduction of A-GNSS

7.1.0

7.2.0

2007-05

34

GP-070780

0071

Addition of Positioning Capability Transfer using RRLP

7.2.0

7.3.0

2007-11

36

GP-072003

0072

6

U-TDOA Enhancement WI modification to procedure for receipt of U-TDOA Request message

7.3.0

8.0.0

2008-08

39

GP-081345

0075

1

Support for additional navigation satellite systems

8.0.0

8.1.0

2009-11

44

GP-092337

0076

5

Changes to Stage II allowing Parallel positioning

8.1.0

9.0.0

2011-03

49

Version for Release 10

9.0.0

10.0.0

2012-09

55

Version for Release 11

10.0.0

11.0.0

2014-02

61

GP-140195

0078

1

Introduction of BDS in GERAN

11.0.0

12.0.0

2015-12

68

Version for Release 13

12.0.0

2016-02

69

GP-160154

0079

1

Introduction of eDRX and EC-EGPRS

13.0.0

13.1.0

Change history

Date

Meeting

TDoc

CR

Rev

Cat

Subject/Comment

New version

2016-05

RP-70

GP-160311

0080

F

Miscellaneous corrections related to EC-GSM-IoT

13.2.0

2017-03

RP-75

RP-170060

0081

8

B

Introduction of Multilateration

14.0.0

2017-03

RP-75

RP-170060

0082

3

B

Introduction of Multilateration OTD

14.0.0

2017-06

RP-76

RP-170923

0084

3

F

Multilateration – Miscellaneous corrections

14.1.0

2017-09

RP-77

RP-171597

0087

A

Removal of references to TS 44.118

14.2.0

2018-03

RP-79

RP-180068

0088

1

B

Security Enhancement for MTA in network configuration without LLC security

15.0.0

2018-06

RP-80

RP-180822

0089

F

Editorial corrections to Security Enhancement for MTA in network configuration without LLC security

15.1.0

2020-07

RP-88e

Upgrade to Rel-16 version without technical change

16.0.0