laforge submitted this change.

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Approvals: laforge: Looks good to me, approved pespin: Looks good to me, approved Jenkins Builder: Verified
s1gw: correct handling of UE CONTEXT RELEASE REQUEST

By sending a UE CONTEXT RELEASE REQUEST, the eNB is requesting the
MME to terminate the UE context. This procedure itself does not
terminate the UE context nor the associated E-RABs. Therefore, the
S1GW should not terminate E-RAB FSMs upon receiving this PDU.

This means that we should not be expecting PFCP sesstion(s)
to be deleted in S1GW_ConnHdlr.f_ConnHdlr_ue_ctx_release_req().

Change-Id: Ibbb6da1f2888995608b980e7479758000e94864e
Related: osmo-s1gw.git If467162e871b7989f0578be30c04d1c32c263c99
Related: SYS#7738, SYS#7599
---
M s1gw/S1GW_ConnHdlr.ttcn
1 file changed, 0 insertions(+), 1 deletion(-)

diff --git a/s1gw/S1GW_ConnHdlr.ttcn b/s1gw/S1GW_ConnHdlr.ttcn
index 013d7bf..b850f55 100644
--- a/s1gw/S1GW_ConnHdlr.ttcn
+++ b/s1gw/S1GW_ConnHdlr.ttcn
@@ -1662,7 +1662,6 @@

log("[eNB -> S1GW] -> MME: UE CONTEXT RELEASE REQUEST");
f_ConnHdlr_tx_s1ap_from_enb(ts_S1AP_UeContextReleaseReq(mme_ue_id, enb_ue_id, cause));
- f_ConnHdlr_session_delete(erabs);
log("eNB -> [S1GW -> MME]: UE CONTEXT RELEASE REQUEST");
f_ConnHdlr_rx_s1ap_from_enb(pdu, tr_S1AP_UeContextReleaseReq(mme_ue_id, enb_ue_id, cause));
}

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Gerrit-MessageType: merged
Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: Ibbb6da1f2888995608b980e7479758000e94864e
Gerrit-Change-Number: 41489
Gerrit-PatchSet: 2
Gerrit-Owner: fixeria <vyanitskiy@sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: laforge <laforge@osmocom.org>
Gerrit-Reviewer: pespin <pespin@sysmocom.de>