A.4 Procedures combining C-plane and U-plane operations
38.3053GPPNG Radio Access Network (NG-RAN)Release 17Stage 2 functional specification of User Equipment (UE) positioning in NG-RANTS
Since SUPL by definition is carried over the user plane, it is not applicable to operations terminating at the NG-RAN. SUPL operations must take place in combination with control-plane procedures over NRPPa.
This situation could arise in the case of UE-assisted OTDOA, for example, in which the SLP needs to provide the UE (in a SUPL session) with assistance data supplied by the NG-RAN. This clause uses a UE-assisted OTDOA positioning operation as an example.
Although the positioning server in this operation is the SLP, the existence of an interface to the LMF means that the SLP can communicate with the LMF via the SPC. In particular, this means that assistance data that was delivered to the LMF via NRPPa can be transferred over to the SLP for delivery to the UE via LPP over SUPL.
There are several ways to realise this general behaviour. In the simplest case, the LMF could be supplied with the necessary assistance data in advance, so that it can be supplied to the SLP without any actual NRPPa procedures taking place in real time (and possibly even before the positioning transaction begins).
Figure A.4-1: Transfer of OTDOA assistance data to UE via SUPL
In the event that the LMF does not have the required assistance data available, it would need to retrieve them from the NG-RAN once it was made aware that they were needed.
Figure A.4-2: Transfer to the UE via SUPL of OTDOA assistance data not already available at the LMF
In both cases, it should be noted that the retrieval of the assistance data is transparent to the UE and to the actual SUPL session. This model is parallel to the approach used with A-GNSS, in which assistance data such as satellite ephemerides are retrieved from sources entirely external to the cellular network. For purposes of LPP over SUPL, the delivery of assistance data to the SLP can be viewed as an independent external process.
The delivery of assistance data to the UE, however, takes place through the same mechanisms as control-plane LPP, transported through SUPL.
Annex B (informative):
Change history
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Change history |
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|
Date |
Meeting |
TDoc |
CR |
Rev |
Cat |
Subject/Comment |
New version |
|
08/2017 |
RAN2#99 |
R2-1709477 |
Skeleton for TS 38.305 |
0.0.1 |
|||
|
03/2018 |
RAN2#101 |
R2-1803804 |
0.1.0 |
||||
|
03/2018 |
RAN#79 |
RP-180171 |
Submitted for Information in RAN#79 |
1.0.0 |
|||
|
05/2018 |
RAN2#102 |
R2-1808695 |
1.1.0 |
||||
|
05/2018 |
RAN2#102 |
R2-1809137 |
1.2.0 |
||||
|
06/2018 |
RP-80 |
RP-180689 |
Submitted for Approval in RAN#80 |
2.0.0 |
|||
|
06/2018 |
Upgraded to Rel-15 after plenary approval |
15.0.0 |
|||||
|
09/2018 |
RP-81 |
RP-181939 |
0001 |
– |
F |
Signalling between an LMF and NG-RAN node/UE |
15.1.0 |
|
RP-81 |
RP-181942 |
0002 |
1 |
F |
Gaps for positioning measurements |
15.1.0 |
|
|
12/2018 |
RP-82 |
RP-182655 |
0006 |
– |
F |
Addition of RTK Assistance Data |
15.2.0 |
|
RP-82 |
RP-182656 |
0007 |
1 |
F |
Capture use of motion information from motion sensors |
15.2.0 |
|
|
03/2019 |
RP-83 |
RP-190544 |
0008 |
2 |
F |
CR to 38.305 on use of positioning measurement gaps for subframe and slot timing detection towards E-UTRA |
15.3.0 |
|
06/2019 |
RP-84 |
RP-191374 |
0009 |
2 |
F |
Minor restructuring of sensor references and addition of sensor methods (IMU) |
15.4.0 |
|
RP-84 |
RP-191374 |
0010 |
3 |
F |
Adding missing reference for autonomous and measuremnts gaps for Inter-RAT RSTD measurements |
15.4.0 |
|
|
RP-84 |
RP-191376 |
0011 |
4 |
F |
Update of OMA SUPL information |
15.4.0 |
|
|
RP-84 |
RP-191378 |
0012 |
4 |
F |
UE Identifier for routing message between Core Network Nodes and RAN |
15.4.0 |
|
|
12/2019 |
RP-86 |
RP-192938 |
0014 |
2 |
F |
Correction on the EUTRAN terminology |
15.5.0 |
|
RP-86 |
RP-192935 |
0015 |
2 |
F |
Corrections for Positioning Architecture |
15.5.0 |
|
|
RP-86 |
RP-192935 |
0016 |
– |
F |
Corrections of terminology for stage 2 |
15.5.0 |
|
|
03/2020 |
RP-87 |
RP-200357 |
0013 |
1 |
B |
Introduction of B1C signal in BDS system in A-GNSS |
16.0.0 |
|
RP-87 |
RP-200345 |
0017 |
3 |
B |
Introduction of NR positioning |
16.0.0 |
|
|
07/2020 |
RP-88 |
RP-201161 |
0019 |
2 |
A |
Clarification on UE Positioning Architecture |
16.1.0 |
|
RP-88 |
RP-201175 |
0021 |
1 |
A |
CR to clarify the meaning of GNSS term in 38.305 Rel-16 |
16.1.0 |
|
|
RP-88 |
RP-201190 |
0024 |
1 |
F |
Update B1I signal ICD file to v3.0 in BDS system in A-GNSS |
16.1.0 |
|
|
RP-88 |
RP-201175 |
0025 |
2 |
F |
Corrections to NR Positioning |
16.1.0 |
|
|
09/2020 |
RP-89 |
RP-201989 |
0028 |
– |
F |
Correction to SUPL support for NR positioning methods |
16.2.0 |
|
RP-89 |
RP-201989 |
0029 |
1 |
F |
Correction on Stage-2 for gNB and LMF information transfer |
16.2.0 |
|
|
RP-89 |
RP-201989 |
0032 |
1 |
F |
Miscellaneous correction to stage2 spec |
16.2.0 |
|
|
RP-89 |
RP-201989 |
0033 |
– |
F |
Signalling sequence correction for UL SRS Configuration |
16.2.0 |
|
|
RP-89 |
RP-201989 |
0034 |
– |
B |
Introduction of NR positioning |
16.2.0 |
|
|
12/2020 |
RP-90 |
RP-202775 |
0037 |
– |
F |
Remove the NOTE in architecture figure in TS 38.305 |
16.3.0 |
|
RP-90 |
RP-202775 |
0048 |
– |
A |
Correction to OTDOA positoning support descriptions in R16 |
16.3.0 |
|
|
RP-90 |
RP-202775 |
0053 |
1 |
F |
NR positioning Stage 2 corrections |
16.3.0 |
|
|
03/2021 |
RP-91 |
RP-210703 |
0062 |
1 |
F |
Support OTDOA assistance data for case of NR serving cell |
16.4.0 |
|
RP-91 |
RP-210693 |
0065 |
1 |
F |
Correction on the description for gNB measurements |
16.4.0 |
|
|
06/2021 |
RP-92 |
RP-211480 |
0069 |
3 |
F |
Correction to 5G support for NB-IoT positioning |
16.5.0 |
|
RP-92 |
RP-211474 |
0072 |
2 |
F |
Correction to NR stage2 spec for MO-LR |
16.5.0 |
|
|
RP-92 |
RP-211474 |
0074 |
– |
F |
Addition of missing parameters for the SRS spatial information |
16.5.0 |
|
|
RP-92 |
RP-211474 |
0075 |
1 |
F |
Correction on NRPPa transaction types |
16.5.0 |
|
|
09/2021 |
RP-93 |
RP-212443 |
0064 |
3 |
F |
Correction to UL E-CID-R16 |
16.6.0 |
|
RP-93 |
RP-212443 |
0077 |
– |
F |
Correction to 38.305 on NG-RAN positioning operations |
16.6.0 |
|
|
RP-93 |
RP-212443 |
0078 |
1 |
F |
Correction on user-plane positioning support by SUPL |
16.6.0 |
|
|
12/2021 |
RP-94 |
RP-213344 |
0081 |
2 |
F |
Alignment between stage 2 and Stage 3 specifications |
16.7.0 |
|
RP-94 |
RP-213344 |
0083 |
– |
F |
Corrections on defintions and scope of information transfer |
16.7.0 |
|
|
03/2022 |
RP-95 |
RP-220510 |
0082 |
2 |
B |
Addition of Timing Advance measurement reporting in NR E-CID [NRTADV] |
17.0.0 |
|
RP-95 |
RP-220479 |
0086 |
– |
B |
Introduction of R17 Positioning Enhancements |
17.0.0 |
|
|
06/2022 |
RP-96 |
RP-221725 |
0099 |
– |
F |
38.305 CR for Positioning WI |
17.1.0 |
|
RP-96 |
RP-221725 |
0100 |
1 |
F |
Stage 2 corrections for NR Positioning Enhancements |
17.1.0 |
|
|
09/2022 |
RP-97 |
RP-222521 |
0102 |
– |
A |
Correction on the description of deferred MT-LR |
17.2.0 |
|
RP-97 |
RP-222524 |
0105 |
2 |
F |
Mscellaneous corrections for TS38.305 |
17.2.0 |
|