5G-MAG / Standards

Specifications related to 5G-MAG's areas of work. Tracking comments, bug-fixing, request for new features, etc.

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TS 26.517: Wrong coding of frequency parameter #127

Open haudiobe opened 5 months ago

haudiobe commented 5 months ago

Context

RAN2 sent an LS to 3GPP SA4 in November 2022 in https://www.3gpp.org/ftp/TSG_SA/WG4_CODEC/TSGS4_121_Toulouse/Docs/S4-221229.zip asking that the following two parameters are to be added: "In NR, the frequency parameter is coded as combination of FreqBandIndicatorNR and ARFCN-ValueNR as defined in 3GPP TS 38.331 and TS 38.101." Recently 26.517 was significantly updated in CR 0001 in order to address the removal of XML and only use JSON.

Problem description

There was an oversight to address the request from RAN2 and only the following parameter is added

radio‌Frequency	array(Uinteger)	M	1..N	The transmission frequency (expressed in Hertz) associated with the MBS Frequency Selection Area (FSA) Identifier in the parent service area.

Suggested solution

Create a CR to 26.517 and address this issue.
Send an LS to RAN2 about the updates

rjb1000 commented 2 months ago

@haudiobe contributed the following CRs to SA4#128 (Jeju) which were agreed:

TS 26.517
- Rel-17: CR0016 "[5MBP3] Correction of Frequency Parameters" in S4-240917, revised to S4-241255 and agreed.
- Rel-18: CR0014 "Support for RedCap UEs in MBS Broadcast" in S4-240897, revised to S4-241253 and agreed.

rjb1000 commented 2 months ago

New specification versions published following approval of CRs at SA#104:

TS 26.517:
- Rel-17: V17.6.0.
- Rel-18: V18.1.0.

rjb1000 commented 2 months ago

Additional CRs agreed at MBS ad hoc meeting to make the new radio parameters optional, since they only apply to MBS Broadcast Session. Also stage-2 alignment CRs to TS 26.502 agreed.

TS 26.502
- Rel-17: CR0032r1 "Radio parameters alignment" agreed in S4aI240086.
- Rel-18 mirror: CR0031 "Radio parameters alignment" agreed in S4aI240080.
TS 26.517
- Rel-17: CR0022 "Make radio parameters optional" agreed in S4aI240092.
- Rel-18 mirror: CR0021 "Make radio parameters optional" agreed in S4aI240091.

All four Change Requests will be resubmitted to SA4#129-e for Working Group agreement.

rjb1000 commented 1 month ago

Change Requests submitted to SA4#129-e:

TS 26.502
- Rel-17: CR0032r2 "Radio parameters alignment" in S4-241399.
- Rel-18 mirror: CR0031r1 "Radio parameters alignment" in S4-241400.
TS 26.517
- Rel-17: CR0022r1 "Make radio parameters optional" in S4-241401.
- Rel-18 mirror: CR0021r1 "Make radio parameters optional" in S4aI241402.

rjb1000 commented 1 month ago

Change Requests agreed at SA4#129-e:

TS 26.502
- Rel-17: CR0032r2 "Radio parameters alignment" agreed in S4-241399.
- Rel-18 mirror: CR0031r1 "Radio parameters alignment" agreed in S4-241400.
TS 26.517
- Rel-17: CR0022r1 "Make radio parameters optional" agreed in S4-241401.
- Rel-18 mirror: CR0021r1 "Make radio parameters optional" agreed in S4aI241402.

These go to SA#105 for approval.