| Discussion and conclusion:
Noted in parallel sessions.
TD S2 160042 LS from RAN WG2: LS on DRB Handling in LWRI. (RAN WG2)
Abstract: In RAN#69, RAN approved a new WI to support IPsec tunnel above PDCP protocol layer between eNB and UE over WLAN . The IPsec tunnel is established between UE and eNB to carry the IP packets from eNB to the UE over the WLAN network. In RAN WG2#92, RAN WG2 agreed the following:
1: Even when the IPsec tunnel is established, EPS Bearer on the LTE Access shall be maintained =>
Working assumption: Even when the IPsec tunnel is established, DRB on the LTE Access shall be
maintained => Working assumption: Capture in the Stage 2 that if the IPsec tunnel is established then it
is expected that eNB routes packets via LTE DRB or via IPSec tunnel.
If eNB implementation routes packets to both LTE DRB and IPSec tunnel simultaneously then delivery of packets to upper layers out of order may occur.
RAN WG2 respectfully likes to inform SA WG2 of the above agreements and requests SA WG2's opinion. RAN WG2 respectfully likes to inform SA WG5 of above agreements.
Action: RAN WG2 respectfully likes to inform SA WG2 of the above agreements and requests SA WG2's opinion.
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