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Content for  TS 23.401  Word version:  16.7.0

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M  Functions and procedures over NB-IoT RAT |R13|Word‑p. 428
In the case of conflict between the information in this Annex and other information in the main body of the present document, the information in the main body takes precedence.
The following Tables list the functions and procedures that are:
  • Supported or not supported over NB-IoT RAT, including whether for CP CIoT EPS Optimisation only, UP CIoT EPS Optimisation only or both.
  • Optional for the UE and/or network when using NB-IoT RAT.
Clause
Clause title
Support

NB-IoT RAT
CP/UP/Both
UE
NW
4.3.3
IP header compression
RoHC (NAS)
Yes
CP
Optional
Optional
RoHC (AS)
Yes
UP
Optional
Optional
4.3.5
Mobility management functions
Yes
Both
Inter-RAT idle mode NAS mobility (WB-E_UTRAN, UTRAN, GERAN)
Yes
Both
Reachability management
Yes
Both
ISR Optional
ISR Optional
TA list management (2)
Yes
Both
ISR
Yes
Both
Optional
Mobility restrictions
Yes
Both
IMS voice over PS session supported indication
No
N/A
N/A
N/A
Voice domain preference and UE usage setting
No
N/A
N/A
N/A
Preferred and supported network behaviour
Yes
Both
4.3.7.1a.2
GTP-C Overload Control
Yes
CP
N/A
4.3.7.4
MME control of overload
Yes
Both
N/A
Extended Access Barring
No
N/A
N/A
N/A
4.3.7.4.2.7
Control Plane data specific NAS level congestion control
Yes
CP
4.3.12
IMS emergency session
No
N/A
N/A
N/A
4.3.12a
Support of Restricted Local Operator Service
No
N/A
N/A
N/A
4.3.13
Closed Subscriber Group
No
N/A
N/A
N/A
4.3.17
Support for MTC
Low access priority
Yes
Both
Optional
Non-IP data delivery (NIDD)
Yes
Both
NIDD SCEF
Yes
CP
N/A (1)
Optional (3)
NIDD SGi
Yes
Both
N/A (1)
Optional (3)
4.3.18
Multimedia Priority Service
No
N/A
N/A
N/A
4.3.22
Power Save Mode
Yes
Both
Optional
Optional
4.3.27a
Restriction of use of Enhanced Coverage for voice centric UE
No
N/A
N/A
N/A
4.3.27b
Restriction of use of Enhanced Coverage for data centric UE
No
N/A
N/A
N/A
4.3.28
Restriction of use of Enhanced Coverage
Yes
Both
Optional
4.3.29
3GPP PS Data Off
Yes
Both
Optional
Optional
4.7
QoS
PDN connection to SCEF
Yes
CP
Optional
Dedicated bearer
No
N/A
N/A
N/A
GBR bearer
No
N/A
N/A
N/A
Non-GBR bearer
Yes
UP
Rate control (Serving PLMN)
Yes
CP
Optional
Rate control (APN)
Yes
Both
Optional
4.7.8
Inter-UE QoS for NB-IoT UEs using Control Plane CIoT EPS Optimisation
Yes
Yes
N/A
Optional
4.10
CIoT EPS Optimisation
UP
Yes
UP
Optional
Optional
CP
Yes
CP

NOTE 1:
Whether the non-IP PDN connection is provided via SCEF or over SGi is transparent to the UE.
NOTE 2:
Required for inter-RAT idle mode mobility.
NOTE 3:
At least one of NIDD SCEF and NIDD SGi is required.

 
Clause
Clause title
Support

NB-IoT RAT
CP/UP/Both
UE
NW
5.3.1
IP address allocation (1)
Yes
Both
Not required for NIDD
5.3.2
Attach procedure
Yes
Both
Normal attach
Yes
Both
Optional (2)
Attach without PDN connectivity
Yes
Both
Optional (2)
Optional
Emergency attach
No
N/A
N/A
N/A
SMS transfer without Combined Attach
Yes
Both
Optional
5.3.3
TAU procedure
Yes (3)
Both
5.3.4
Service request procedures
Yes
Both (4)
5.3.4A
Connection Suspend procedure
Yes
UP
5.3.4B
Data transport in CP CIoT EPS Optimisation
Yes
CP
Reliable data delivery with hop-by-hop acknowledgement
Yes
CP
N/A
Optional
5.3.5
S1 release procedure
Yes (5)
5.3.5A
Connection resume procedure
Yes
UP
5.3.6A
PDN GW pause of charging procedure
Yes
Both
N/A
Optional
5.3.7
GUTI reallocation procedure
Yes
Both
5.3.8
Detach procedure
Yes (6)
Both
5.3.10
Security function
Yes
Both
AS security
Yes
UP
NAS security
Yes
Both
5.3.14
UE radio capability match request
No (7)
N/A
N/A
N/A

NOTE 1:
Incl. attach without PDN connectivity.
NOTE 2:
At least one of Normal attach and Attach without PDN connectivity is required.
NOTE 3:
Incl. inter RAT.
NOTE 4:
Also supported with CP CIoT EPS Optimisation when the UE/MME also support S1-U data transfer or UP CIoT EPS Optimisation.
NOTE 5:
Releases the S11-U bearer in the case of CP CIoT EPS Optimisation. RRC Connection release is used with the UE.
NOTE 6:
ISR aspects optional.
NOTE 7:
IMS Voice not supported over NB-IoT.

 
Clause
Clause title
Support

NB-IoT RAT
CP/UP/Both
UE
NW
5.4.1
Dedicated bearer activation
No
N/A
N/A
N/A
5.4.2
Bearer modification with QoS update
Yes
UP
Optional
Optional
5.4.3
PDN GW initiated bearer modification without bearer QoS update
Yes
UP
5.4.4
Bearer deactivation
Yes
UP
5.4.5
UE-requested bearer resource modification
Yes
Both
Optional with CP CIoT EPS Optimisation
5.4.7
E-UTRAN initiated ERAB modification procedure
No (1)
N/A
N/A
N/A
5.4.8
E-UTRAN initiated UE context modification procedure
No (1)
N/A
N/A
N/A

NOTE 1:
Dual connectivity not supported over NB-IoT RAT.

 
Clause
Clause title
Support

NB-IoT RAT
CP/UP/Both
UE
NW
5.5
Handover
No
5.5.1
Intra-E-UTRAN handover
No
N/A
N/A
N/A
5.5.2
Inter RAT handover
No
N/A
N/A
N/A
5.6
Network assisted cell change
No
N/A
N/A
N/A

 
Clause
Clause title
Support

NB-IoT RAT
CP/UP/Both
UE
NW
5.8
MBMS (3)
(3)
(3)
(3)
(3)
5.10
Multiple PDN support and PDN activation for UEs supporting Attach without PDN connectivity
Yes (1)
Both
5.11
UE capability handling
Yes
Both
5.12
Warning message delivery
No
N/A
N/A
N/A
5.13
DRX and UE-specific DRX parameter handling
Yes (2)
Both
5.13a
Extended idle mode DRX
Yes
Both
Optional
Optional
5.15
RAN information management procedures
No
N/A
N/A
N/A
5.16
MME-initiated procedure on UE's CSG membership change
No
N/A
N/A
N/A
5.17
HeNB multicast packet forwarding function
No
N/A
N/A
N/A

NOTE 1:
Multiple PDN optional.
NOTE 2:
UE-specific DRX not supported in NB-IoT RAT.
NOTE 3:
See Table M-6.

 
Clause
Clause title
Support

NB-IoT RAT
CP/UP/Both
UE
NW
4.5.14.3
Reliable Data Service
Yes
CP
Optional
Optional
4.5.15, 5.14
Support of Packet Flow Description management via SCEF
Yes
Both
N/A
Optional
4.5.16
MSISDN-less MO-SMS via T4
Yes
Both
Optional
Optional
4.5.18
MBMS user service for UEs using power saving functions
Yes
Both
Optional
Optional
4.5.19
Enhancements to Location Services for CIoT
Yes
Both
Optional
Optional

NOTE:
This table lists MTC/CIoT-related items in TS 23.682 not otherwise specified in the present specification.

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