3GPP Scout / Updates / Company proposal change
Company proposal changeRAN2 #135-bis
vivo proposes a frequency alignment timer at RAN2 #135-bis
At a glance
At RAN2 #135-bis, vivo proposed a frequency alignment timer triggered by FAC after asking at RAN2 #135 whether one was needed.
What changed in the proposal
Both vivo contributions address Global Navigation Satellite System (GNSS) resilient New Radio non-terrestrial network (NR-NTN) operation. RAN2 is the 3GPP radio protocols working group. At RAN2 #135, vivo's R2-2604549, Proposal 7, asked RAN2 to discuss "whether a timer mechanism should be introduced". vivo also asked RAN2 to discuss user equipment (UE) behavior if such a timer expired.
Source: R2-2604549, vivo, 3GPP TSG RAN WG2 #135. © vivo.
At RAN2 #135-bis, vivo's R2-2606660, Proposal 4, proposed a new timer, for example frequencyAlignmentTimer. The proposed timer would control frequency alignment validity and be "started or restarted upon reception of FAC". FAC names what must be received to start or restart the proposed timer. Our reading: Proposal 4 does not address the earlier question of UE behavior when the timer expires.
Source: R2-2606660, vivo, 3GPP TSG RAN WG2 #135-bis. © vivo.
The RAN2 #135 register marks Proposal 7 as noted. The RAN2 #135-bis register lists Proposal 4 as available, with no decision recorded. Our reading: neither register status establishes agreement to introduce the proposed timer.
Sources
- R2-2604549, vivo, 3GPP TSG RAN WG2 #135. © vivo.
- R2-2606660, vivo, 3GPP TSG RAN WG2 #135-bis. © vivo.
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