Report of sa wg2 meeting #114

Abstract: Summary of change: Aspects included in this CR:
1) define NB-IoT as a subset of E-UTRAN (and, for this specification, define 'WB-E-UTRAN' as the subset
of all E-UTRAN that excludes NB-IoT) (clause 3.1)
2) inhibiting Detach for NB-IoT UE when last EPS bearer is deactivated or none are active (4.6.2.2, 5.3.8.2,
5.3.8.3, 5.4.4.1, 5.10.3);
3) DCNs (4.3.25.1) and eNB selection of MME (4.3.8.3)
4) Take NB-IoT (and WB-E-UTRAN) capability into account in SGW and PGW selection (4.3.8.1, 4.3.8.2)
5) Updated MME functions to support 'small data via MME' (4.4.2, 4.7.3, 5.2.1). SGW updates in 4.4.3.2.
6) Support for 'Non-IP' PDN type (4.3.2.2, 4.4.3.3, 4.7.1, 4.7.2.1, 5.3.1.1, 5.7.1, 5.7.2, 5.7.3, 5.7.4, 5.7.5,
5.10.2, )
7) No handover supported for NB-IoT (4.6.3.2, 5.5.2.0, 5.6)
8) Update EPS bearer description to handle 'non-IP', 'small data via MME' and RAN WG2 decisions (4.7.1,
4.7.2.1, 4.7.3, 5.3.3.2, ).
9) Update Paging Policy Differentiation for non-IP PDN type (4.9)
10) That the eNB provides the RAT in use (NB-IoT or WB-E-UTRAN) to the MME in UPLINK NAS TRANSPORT messages (5.3.3.0A)
11) User data security for 'small data via MME' (5.3.10.4)
12) HSS and MME support for separately restricting access to NB-IoT and WB-E-UTRAN (5.7.1, 5.7.2).
13) PDN GW awareness of use of WB-E-UTRAN vs NB-IoT (5.9.2.1, 5.10.2)
14) Standalone PDN bearer activation for NB-IoT(5.10)
15) NB-IoT usage of standalone PDN connectivity procedure (5.10.2)
____ Updates below made for rev 3 for SA WG2 #113, St. Kitts___________
a) updated base version to v13.5.0
b) Update rev 2 cover sheet (WLAN offload not addressed by this CR; 4.7.6 and 5.12.1 removed from
clauses affected)
c) coloured highlighting in rev 2 removed
d) definition of WB-E-UTRAN editorially revised (3.1)
e) references to TS 29.303 'DNS Stage 3' added. (4.3.8.1, 4.3.8.2.)
f) 'non-IP' added to PDN GW and SGW selection function criteria (4.3.8.1, 4.3.8.2.)
g) (because of CIoT optimisations now being applicable to non-NB-IoT devices that support network
controlled handover) the selection of target MME by source MME needs to take into account CIoT
optimisations (clause 4.3.8.3).
h) ENB selection of Rel-13 MME / MME supporting CIoT clarified at the end of 4.3.8.3.
i) reflect telco discussion to police AMBR for Control Plane EPS optimisation in E-UTRAN rather than
MME. (section 4.4.1, 4.4.2 and 4.7.3).
j) 4.6.2.2 made generic to UEs supporting 'Attach without PDN connectivity' rather than just
NB-IoT-only UE.
NOTE that this 'Attach without PDN connectivity' should be added to the 'preferred network
behaviour' IE. State diagrams in clause 4.6.4 updated to align.
Text in 5.4.4.1 and 5.10, 5.10.2, 5.10.3, also aligned.
k) MT Service Request: text now indicates that (when used) the Control plane optimisation section
replaces the whole procedure.
l) term 'just NAS signalling' in 5.10.3 revised.