回礼NAS主要流程与消息文档

2021年1月20日发(作者：丁绍光)
Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS)
1.

概述

非接入层
（
NAS
）
是
UE
与
MME
之间的
Uu
无线接口的控制面的最高层。
主要功能有：

1
）对
UE
移动性的支持


2
）对在< br>UE
和数据报网关之间建立和保持
IP
连接的会话管理程序的支持

2.

EMM
协议

2.1.

EMM
流程种类

1
）
EMM
常规流程

-
-
-
-
-
GUTI reallocation;
authentication;
security mode control;
identification;
EMM information.
2
）
EMM
特殊流程

-
-
-
-
attach and combined attach.
attach.
detach and combined detach.
normal tracking area updating and combined tracking area updating (S1
mode only);
-
periodic tracking area updating (S1 mode only).
3
）
EMM
连接管理流程（
S1 mode only
）

-
-
-
-
service request.
paging procedure.
transport of NAS messages;
generic transport of NAS messages.
2.2.

EMM common procedures
GUTI reallocation procedure:

allocate a GUTI and optionally to provide a new TAI list to a particular UE.
UE
GUTI REALLOCATION COMMAND
MME
Start T3450
Stop T3450
GUTI REALLOCATION COMPLETE

Authentication procedure:

provide mutual authentication between the user and the network and to agree
on a key KASME
UE
AUTHENTICATION REQUEST
MME
Start T3460
Stop T3460
if
authentication
failed
AUTHENTICATION RESPONSE
AUTHENTICATION REJECT


Security mode control procedure:

take
an
EPS
security
context
into
use,
and
initialise
and
start
NAS
signalling
security between the UE and the MME with the corresponding EPS NAS keys and
EPS security algorithms
UE
SECURITY MODE COMMAND
MME
Start T3460
Stop T3460
SECURITY MODE COMPLETE
OR
SECURITY MODE REJECT
Stop T3460

Identification procedure:

request
a
particular UE to
provide specific
identification
parameters,
e.g.
the
International
Mobile
Subscriber
Identity
(IMSI)
or
the
International
Mobile
Equipment Identity (IMEI)
UE
IDENTITY REQUEST
MME
Start T3470
Stop T3470
IDENTITY RESPONSE

EMM information procedure:

allow the network to provide information to the UE.
UE
EMM INFORMATION
2.3.

EMM specific procedures
Attach procedure
：


attach to an EPC for packet services in EPS
MME
4
UE
Start T3410
ATTACH REQUEST
MME
Stop T3410
ATTACH ACCEPT
Start T3450
ATTACH COMPLETE
Stop T3450
OR
ATTACH REQUEST
Start T3410
ATTACH REJECT
Stop T3410


Detach procedure
：

is used:
-
by the UE to detach for EPS services only;
-
by the UE to disconnect from the last PDN it is connected to;
-
by the UE in CS/PS mode 1 or CS/PS mode 2 of operation to detach for both
EPS services and non-EPS services or for non-EPS services only via a
combined detach procedure;
-
by the network to inform the UE that it is detached for EPS services or
non-EPS services or both;
-
by the network to disconnect the UE from the last PDN to which it is
connected; and
-
by the network to inform the UE to re- attach to the network and re-establish
all PDN connections.
UE
Start T3421
DETACH REQUEST
MME
Stop T3421
DETACH ACCEPT
or UE at switch off:
DETACH REQUEST

Tracking area updating procedure (S1 mode only)
：

initiated by the UE and is used for the following purposes:
-
normal tracking area updating to update the registration of the actual
tracking area of a UE in the network;
-
combined tracking area updating to update the registration of the actual
tracking area for a UE in CS/PS mode 1 or CS/PS mode 2 of operation;
-
periodic tracking area updating to periodically notify the availability of the UE
to the network;
-
IMSI attach for non-EPS services when the UE is attached for EPS services. This
procedure is used by a UE in CS/PS mode 1 or CS/PS mode 2 of operation;
-
in various cases of inter- system change from Iu mode to S1 mode or from
A/Gb mode to S1 mode;
-
S101 mode to S1 mode inter-system change;
-
MME load balancing;
-
to update certain UE specific parameters in the network;
-
recovery from certain error cases;
-
to indicate that the UE enters S1 mode after CS fallback or 1xCS fallback;
-
to indicate to the network that the UE has selected a CSG cell whose CSG
identity and associated PLMN identity are not included in the UE's Allowed
CSG list or in the UE's Operator CSG list;
-
to indicate the current radio access technology to the network for the support
of terminating access domain selection for voice calls or voice sessions; and
-
to indicate to the network that the UE has locally released EPS bearer
context(s).
UE
Start T3430
TRACKING AREA UPDATE REQUEST
MME
Stop T3430
If GUTI allocated,
TRACKING AREA UPDATE ACCEPT
If GUTI allocated,
Start T3450
TRACKING AREA UPDATE COMPLETE
Stop T3450
OR
TRACKING AREA UPDATE REQUEST
Start T3430
Stop T3430
TRACKING AREA UPDATE REJECT

2.4.

EMM connection management procedures (S1 mode
only)
Service request procedure
：

transfer
the
EMM
mode
from
EMM-IDLE
to
EMM- CONNECTED
mode
and
establish
the
radio
and
S1
bearers
when
user
data
or
signalling
is
to
be
sent.
Another purpose of this procedure is to invoke MO/MT CS fallback or 1xCS fallback
procedures
UE
Start T3417
AS
SERVICE REQUEST
AS indication about
bearer establishment for user plane

MME
Stop T3417
OR
Start T3417
EXTENDED SERVICE REQUEST
(not for CSFB)
AS indication about
bearer establishment for user plane

Stop T3417
OR
Start T3417ext
EXTENDED SERVICE REQUEST
(for CSFB)
AS indication about system
change
Stop T3417ext
OR
Start T3417
Stop T3417
OR
Start T3417ext
Stop T3417ext

EXTENDED SERVICE REQUEST
SERVICE REJECT
SERVICE REQUEST
SERVICE REJECT
Paging procedure
：

request the establishment of a NAS signalling connection to the UE.
UE
Paging
AS
Request paging
MME
Start T3413
SERVICE REQUEST or EXTENDED SERVICE REQUEST
Stop T3413

Transport of NAS messages procedure
：

carry SMS messages in an encapsulated form between the MME and the UE
3.

ESM procedures
3.1.

ESM
流程种类

Two types of ESM procedures can be distinguished:
1)
Procedures related to EPS bearer contexts:

These procedures are initiated by the network and are used for the
manipulation of EPS bearer contexts:
-
-
-
-
default EPS bearer context activation;
dedicated EPS bearer context activation;
EPS bearer context modification;
EPS bearer context deactivation.
2)
Transaction related procedures:

These procedures are initiated by the UE to request for resources, i.e. a new
PDN connection or dedicated bearer resources, or to release these resources:
-
-
-
-

PDN connectivity procedure;
PDN disconnect procedure;
bearer resource allocation procedure;
bearer resource modification procedure.
When combined with the attach procedure, the PDN connectivity procedure
can trigger the network to execute the following transaction related procedure:
-
ESM information request procedure.
A successful transaction related procedure initiated by the UE triggers the network
to execute one of the procedures related to EPS bearer contexts. The UE treats the
start
of
the
procedure
related
to
the
EPS
bearer
context
as
completion
of
the
transaction related procedure.
The
following
ESM
procedures
can
be
related
to
an
EPS
bearer
context
or
to
a
procedure transaction:
-
-
ESM status procedure;
notification procedure.
3.2.

Network initiated ESM procedures
Default EPS bearer context activation procedure
：

establish a default EPS bearer context between the UE and the EPC.
UE
ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST
Network
Start T3485
Stop T3485
ACTIVATE DEFAULT EPS BEARER CONTEXT ACCEPT
OR
ACTIVATE DEFAULT EPS BEARER CONTEXT REJECT
Stop T3485

Dedicated EPS bearer context activation procedure
：

establish an EPS bearer context with specific QoS and TFT between the UE and
the EPC.
UE
ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST
Network
Start T3485
Stop T3485
ACTIVATE DEDICATED EPS BEARER CONTEXT ACCEPT
OR
ACTIVATE DEDICATED EPS BEARER CONTEXT REJECT
Stop T3485

EPS bearer context modification procedure
：

modify an EPS bearer context with a specific QoS and TFT.
UE
MODIFY EPS BEARER CONTEXT REQUEST
Network
Start T3486
Stop T3486
MODIFY EPS BEARER CONTEXT ACCEPT
OR
MODIFY EPS BEARER CONTEXT REJECT
Stop T3486

EPS bearer context deactivation procedure
：

deactivate an EPS bearer context or disconnect from a PDN by deactivating all
EPS bearer contexts to the PDN.
UE
DEACTIVATE EPS BEARER CONTEXT REQUEST
Network
Start T3495
Stop T3495
DEACTIVATE EPS BEARER CONTEXT ACCEPT

3.3.

UE requested ESM procedures
UE requested PDN connectivity procedure
：

for a UE to request the setup of a default EPS bearer to a PDN.
UE
Start T3482
PDN CONNECTIVITY REQUEST
Network
Stop T3482
ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST
OR
Stop T3482
PDN CONNECTIVITY REJECT


UE requested PDN disconnect procedure
：

for a UE to request disconnection from one PDN.
UE
Start T3492
PDN DISCONNECT REQUEST
Network
Stop T3492
DEACTIVATE EPS BEARER CONTEXT REQUEST
OR
Stop T3492
PDN DISCONNECT REJECT

UE requested bearer resource allocation procedure
：

for
a
UE
to
request
an
allocation
of
bearer
resources
for
a
traffic
flow
aggregate.
UE
Start T3480
Stop T3480
BEARER RESOURCE ALLOCATION REQUEST
Network
ACTIVATE DEDICATED EPS BEARER CONTEXT
REQUEST
OR
Stop T3480
MODIFY EPS BEARER CONTEXT REQUEST
OR
Stop T3480

BEARER RESOURCE ALLOCATION REJECT

UE requested bearer resource modification procedure
：

for a UE to request a modification or release of bearer resources for a traffic
flow
aggregate
or
modification
of
a
traffic
flow
aggregate
by
replacing
packet
filters or adding packet filters.
UE
Start T3481
Stop T3481
BEARER RESOURCE MODIFICATION REQUEST
Network
ACTIVATE DEDICATED EPS BEARER CONTEXT
REQUEST
OR
Stop T3481
MODIFY EPS BEARER CONTEXT REQUEST
OR
Stop T3481
DEACTIVATE EPS BEARER CONTEXT REQUEST
OR
Stop T3481
BEARER RESOURCE MODIFICATION REJECT


3.4.

Miscellaneous procedures
：

Exchange of protocol configuration options
：

The UE and the PDN GW can exchange protocol configuration options
UE
ESM INFORMATION REQUEST
Network
Start T3489
Stop T3489
ESM INFORMATION RESPONSE


Notification procedure
：

inform
the
UE
about
events
which
are
relevant
for
the
upper
layer
which
is
using an EPS bearer context or has requested a procedure transaction.
UE
NOTIFICATION
MME

4.

EMM
消息格式

4.1.

Attach accept
Message type:
ATTACH ACCEPT
Significance:

Direction:

dual

network to UE
1
、

Table 8.2.1.1: ATTACH ACCEPT message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Attach accept message
identity
Message type
9.8
EPS attach result
9.9.3.10
M
V
1

EPS attach result
M
V
1/2

Spare half octet
Spare half octet
9.9.2.9
M
V
1/2

T3412 value
GPRS timer
9.9.3.16
M
V
1

TAI list
Tracking area identity list
9.9.3.33
M
LV
7-97

ESM message container
ESM message container
9.9.3.15
M
LV-E
5-n
50
GUTI
EPS mobile identity
9.9.3.12
O
TLV
13
13
Location area identification
Location area identification
9.9.2.2
O
TV
6
23
MS identity

Mobile identity
9.9.2.3
EMM cause
9.9.3.9
O
TLV
7-10
53
EMM cause
O
TV
2
17
T3402 value
GPRS timer
9.9.3.16
O
TV
2
59
T3423 value
GPRS timer
9.9.3.16
O
TV
2
4A
Equivalent PLMNs
PLMN list
9.9.2.8
O
TLV
5-47
34
Emergency number list
Emergency number list
9.9.3.37
O
TLV
5-50
64
EPS network feature
support
EPS network feature support
9.9.3.12A
Additional update result
9.9.3.0A
O
TLV
3
F-
Additional update result
O
TV
1
5E
T3412 extended value
GPRS timer 3
9.9.3.16B
O
TLV
3
4.2.

Attach complete
Message type:
Significance:

Direction:


ATTACH COMPLETE
dual
UE to network
Table 8.2.2.1: ATTACH COMPLETE message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Attach complete message
Message type
identity
9.8
ESM message container
9.9.3.15
M
V
1

ESM message container
M
LV-E
5-n
4.3.

Attach reject
Message type:
Significance:

Direction:


ATTACH REJECT
dual
network to UE
Table 8.2.3.1: ATTACH REJECT message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Attach reject message
identity
Message type
9.8
EMM cause
9.9.3.9
M
V
1

EMM cause
M
V
1
78
ESM message container
ESM message container
9.9.3.15
O
TLV-E
6-n
5F
T3346 value
GPRS timer 2
9.9.3.16A
O
TLV
3
16
T3402 value
GPRS timer 2
9.9.3.16A
O
TLV
3

4.4.

Attach request
Message type:
Significance:

ATTACH REQUEST
dual
Direction:


UE to network
Table 8.2.4.1: ATTACH REQUEST message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Attach request message
identity
Message type
9.8
EPS attach type
9.9.3.11
M
V
1

EPS attach type
M
V
1/2

NAS key set identifier
NAS key set identifier
9.9.3.21
M
V
1/2

EPS mobile identity
EPS mobile identity
9.9.3.12
M
LV
5-12

UE network capability
UE network capability
9.9.3.34
M
LV
3-14

ESM message container
ESM message container
9.9.3.15
M
LV-E
5-n
19
Old P-TMSI signature
P-TMSI signature
9.9.3.26
O
TV
4
50
Additional GUTI
EPS mobile identity
9.9.3.12
O
TLV
13
52
Last visited registered TAI
Tracking area identity
9.9.3.32
O
TV
6
5C
DRX parameter
DRX parameter
9.9.3.8
O
TV
3
31
MS network capability
MS network capability
9.9.3.20
O
TLV
4-10
13
Old location area
identification
Location area identification
9.9.2.2
TMSI status
9.9.3.31
O
TV
6
9-
TMSI status
O
TV
1
11
Mobile station classmark 2
Mobile station classmark 2
9.9.2.4
O
TLV
5
20
Mobile station classmark 3
Mobile station classmark 3
9.9.2.5
O
TLV
2-34
40
Supported Codecs
Supported Codec List
9.9.2.10
O
TLV
5-n
F-
Additional update type
Additional update type
9.9.3.0B
O
TV
1
5D
Voice domain preference
and UE's usage setting
Voice domain preference and
UE's usage setting
9.9.3.44
O
TLV
3
D-
Device properties
Device properties
9.9.2.0A
O
TV
1
E-
Old GUTI type
GUTI type
9.9.3.45
O
TV
1
C-

MS network feature
support
10
MS network feature support

9.9.3.20A
O
TV
1
TMSI based NRI container
Network resource identifier
container
9.9.3.24A
O
TLV
4
4.5.

Authentication failure
Message type:
Significance:

Direction:


AUTHENTICATION FAILURE
dual
UE to network
Table 8.2.5.1: AUTHENTICATION FAILURE message content
IEI

Information element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
M
V
Length
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Authentication failure
message type
Message type
9.8
EMM cause
9.9.3.9
M
V
1

EMM cause
M
V
1
30
Authentication failure
parameter
Authentication failure
parameter
9.9.3.1
O
TLV
16
4.6.

Authentication reject
Message type:
Significance:

Direction:


AUTHENTICATION REJECT
dual
network to UE
Table 8.2.6.1: AUTHENTICATION REJECT message content
IEI

Information element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
M
V
Length
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Authentication reject
message type
Message type
9.8
M
V
1
4.7.

Authentication request
Message type:
Significance:

Direction:


AUTHENTICATION REQUEST
dual
network to UE
Table 8.2.7.1: AUTHENTICATION REQUEST message content
IEI

Information element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
M
V
Length
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Authentication request
message type
Message type
9.8

M
V
1

NAS key set identifier
ASME


NAS key set identifier
9.9.3.21
M
V
1/2

Spare half octet
Spare half octet
9.9.2.9
M
V
1/2

Authentication parameter
Authentication parameter
RAND (EPS challenge)
RAND
9.9.3.3
M
V
16

Authentication parameter
Authentication parameter
AUTN (EPS challenge)
AUTN
9.9.3.2
M
LV
17
4.8.

Authentication response
Message type:
Significance:

AUTHENTICATION RESPONSE
dual
Direction:


UE to network
Table 8.2.8.1: AUTHENTICATION RESPONSE message content
IEI

Information element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
M
V
Length
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Authentication response
message type
Message type
9.8
Authentication response
parameter
9.9.3.4
M
V
1

Authentication response
parameter
M
LV
5-17
4.9.

CS service notification
Message type:
Significance:

Direction:


CS SERVICE NOTIFICATION
dual
network to UE
Table 8.2.9.1: CS SERVICE NOTIFICATION message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

CS service notification
message identity
Message type
9.8
Paging identity
9.9.3.25A
M
V
1

Paging identity
M
V
1
60
CLI
CLI
9.9.3.38
O
TLV
3-14
61
SS Code
SS Code
9.9.3.39
O
TV
2
62
LCS indicator
LCS indicator
9.9.3.40
O
TV
2
63
LCS client identity
LCS client identity
9.9.3.41
O
TLV
3-257
4.10.

Detach accept
Message type:
Significance:

DETACH ACCEPT
dual
Direction:


network to UE
Table 8.2.10.1.1: DETACH ACCEPT message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Detach accept message
identity
Message type
9.8
M
V
1
4.11.

Detach request
Message type:
Significance:

Direction:


DETACH REQUEST
dual
UE to network
Table 8.2.11.1.1: DETACH REQUEST message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Detach request message
identity
Message type
9.8
Detach type
9.9.3.7
M
V
1

Detach type
M
V
1/2

NAS key set identifier
NAS key set identifier

9.9.3.21
M
V
1/2

EPS mobile identity
EPS mobile identity
9.9.3.12
M
LV
5-12
4.12.

Downlink NAS Transport
Message type:
Significance:

Direction:


DOWNLINK NAS TRANSPORT
dual
network to UE
Table 8.2.12.1: DOWNLINK NAS TRANSPORT message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Downlink NAS transport
message identity
Message type
9.8
NAS message container
9.9.3.22
M
V
1

NAS message container
M
LV
3-252
4.13.

EMM information

Message type:
EMM INFORMATION
Significance:

Direction:


local
network to UE
Table 8.2.13.1: EMM INFORMATION message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

EMM information message
Message type
identity
9.8
Network name
9.9.3.24
M
V
1
43
Full name for network
O
TLV
3-n
45
Short name for network
Network name
9.9.3.24
O
TLV
3-n
46
Local time zone
Time zone
9.9.3.29
O
TV
2
47
Universal time and local
time zone
Time zone and time
9.9.3.30
Daylight saving time
9.9.3.6
O
TV
8
49
Network daylight saving
time
O
TLV
3
4.14.

EMM status
Message type:
Significance:

EMM STATUS
local
Direction:


both
Table 8.2.14.1: EMM STATUS message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

EMM status message
identity
Message type
9.8
EMM cause
9.9.3.9
M
V
1

EMM cause
M
V
1
4.15.

Extended service request
Message type:
Significance:

Direction:


EXTENDED SERVICE REQUEST
dual
UE to network
Table 8.2.15.1: EXTENDED SERVICE REQUEST message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Extended service request
message identity
Message type
9.8
Service type
9.9.3.27
M
V
1

Service type
M
V
1/2

NAS key set identifier
NAS key set identifier
9.9.3.21
M
V
1/2

M-TMSI
Mobile identity
9.9.2.3
M
LV
6
B-
CSFB response
CSFB response
9.9.3.5
C
TV
1
57
EPS bearer context status
EPS bearer context status
9.9.2.1
O
TLV
4
D-
Device properties
Device properties
9.9.2.0A
O
TV
1
4.16.

GUTI reallocation command
Message type:
Significance:

Direction:


GUTI REALLOCATION COMMAND
dual
network to UE
Table 8.2.16.1: GUTI REALLOCATION COMMAND message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

GUTI reallocation
command message
identity
Message type
9.8
M
V
1

GUTI
EPS mobile identity
9.9.3.12
M
LV
12
54
TAI list
Tracking area identity list
9.9.3.33
O
TLV
8-98
4.17.

GUTI reallocation complete
Message type:
Significance:

Direction:


GUTI REALLOCATION COMPLETE
dual
UE to network
Table 8.2.17.1: GUTI REALLOCATION COMPLETE message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

GUTI reallocation complete
Message type
message identity

9.8
M
V
1
4.18.

Identity request
Message type:
Significance:

Direction:


IDENTITY REQUEST
dual
network to UE
Table 8.2.18.1: IDENTITY REQUEST message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Identity request message
identity
Message type
9.8
Identity type 2
9.9.3.17
M
V
1

Identity type
M
V
1/2

Spare half octet
Spare half octet

9.9.2.9
M
V
1/2
4.19.

Identity response
Message type:
Significance:

Direction:


IDENTITY RESPONSE
dual
UE to network
Table 8.2.19.1: IDENTITY RESPONSE message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Identity response message
Message type
9.8
M
V
1

Mobile identity
Mobile identity
9.9.2.3
M
LV
4-10

4.20.

Security mode command
Message type:
Significance:

Direction:


SECURITY MODE COMMAND
dual
network to UE
Table 8.2.20.1: SECURITY MODE COMMAND message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Security mode command
message identity
Message type
9.8
NAS security algorithms
9.9.3.23
NAS key set identifier
9.9.3.21
M
V
1

Selected NAS security
algorithms
M
V
1

NAS key set identifier
M
V
1/2

Spare half octet
Spare half octet
9.9.2.9
M
V
1/2

Replayed UE security
capabilities
UE security capability
9.9.3.36
IMEISV request
9.9.3.18
M
LV
3-6
C-
IMEISV request
O
TV
1
55
Replayed nonce
UE

Nonce
9.9.3.25
O
TV
5
56
Nonce
MME

Nonce
9.9.3.25
O
TV
5

4.21.

Security mode complete
Message type:
Significance:

Direction:


SECURITY MODE COMPLETE
dual
UE to network
Table 8.2.21.1: SECURITY MODE COMPLETE message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Security mode complete
message identity
Message type
9.8
Mobile identity
9.9.2.3
M
V
1
23
IMEISV
O
TLV
11
4.22.

Security mode reject
Message type:
SECURITY MODE REJECT
Significance:

Direction:


dual
UE to network
Table 8.2.22.1: SECURITY MODE REJECT message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Security mode reject
message identity
Message type
9.8
EMM cause
9.9.3.9
M
V
1

EMM cause
M
V
1
4.23.

Security protected NAS message
Message type:
Significance:

Direction:


SECURITY PROTECTED NAS MESSAGE
dual
both
Table 8.2.23.1: SECURITY PROTECTED NAS MESSAGE message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Message authentication
code
Message authentication code
9.5
Sequence number
9.6
M
V
4

Sequence number
M
V
1

NAS message
NAS message
9.7
M
V
1-n
4.24.

Service reject
Message type:
Significance:

Direction:


SERVICE REJECT
dual
network to UE
Table 8.2.24.1: SERVICE REJECT message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Service reject message
identity
Message type
9.8
EMM cause
9.9.3.9
M
V
1

EMM cause
M
V
1
5B
T3442 value
GPRS timer
9.9.3.16
C
TV
2
5F
T3346 value
GPRS timer 2
9.9.3.16A
O
TLV
3
4.25.

Service request
Message type:
Significance:

Direction:


SERVICE REQUEST
dual
UE to network
Table 8.2.25.1: SERVICE REQUEST message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

KSI and sequence number
KSI and sequence number
9.9.3.19
M
V
1

Message authentication
code (short)
Short MAC
9.9.3.28
M
V
2
4.26.

Tracking area update accept
Message type:
Significance:

Direction:


TRACKING AREA UPDATE ACCEPT
dual
network to UE
Table 8.2.26.1: TRACKING AREA UPDATE ACCEPT message content
IEI
Information Element
Type/Reference
Presence
Forma
Lengt
t
h
1/2

Protocol discriminator
Protocol discriminator
9.2
M
V

Security header type
Security header type
9.3.1
M
V
1/2

Tracking area update
accept message
identity
Message type
9.8
M
V
1

EPS update result
EPS update result
9.9.3.13
M
V
1/2

Spare half octet
Spare half octet
9.9.2.9
M
V
1/2
5A
T3412 value
GPRS timer
9.9.3.16
O
TV
2
50
GUTI
EPS mobile identity
9.9.3.12
O
TLV
13
54
TAI list
Tracking area identity list
9.9.3.33
O
TLV
8-98
57
EPS bearer context
status
EPS bearer context status
9.9.2.1
Location area
identification
9.9.2.2
O
TLV
4
13
Location area
identification
O
TV
6
23
MS identity
Mobile identity
9.9.2.3
O
TLV
7-10
53
EMM cause
EMM cause
9.9.3.9
O
TV
2
17
T3402 value
GPRS timer
9.9.3.16
O
TV
2
59
T3423 value
GPRS timer
9.9.3.16
O
TV
2
4A
Equivalent PLMNs
PLMN list
9.9.2.8
O
TLV
5-47
34
Emergency number list
Emergency number list
9.9.3.37
O
TLV
5-50
64
EPS network feature
support
EPS network feature
support
9.9.3.12A
O
TLV
3
F-
Additional update
result
Additional update result
9.9.3.0A
O
TV
1
5E
T3412 extended value
GPRS timer 3
9.9.3.16B
O
TLV
3
4.27.

Tracking area update complete
Message type:
Significance:

Direction:


TRACKING AREA UPDATE COMPLETE
dual
UE to network
Table 8.2.27.1: TRACKING AREA UPDATE COMPLETE message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Tracking area update
Message type
M
V
1
complete message identity
9.8

4.28.

Tracking area update reject
Message type:
Significance:

Direction:


TRACKING AREA UPDATE REJECT
dual
network to UE
Table 8.2.28.1: TRACKING AREA UPDATE REJECT message content
IEI

Information Element
Protocol discriminator
Type/Reference
Protocol discriminator
9.2
Presence
Format
Length
M
V
1/2

Security header type
Security header type
9.3.1
M
V
1/2

Tracking area update reject
Message type
message identity
9.8
EMM cause
9.9.3.9
M
V
1

EMM cause
M
V
1
5F
T3346 value
GPRS timer 2
9.9.3.16A
O
TLV
3
4.29.

Tracking area update request
Message type:
Significance:

Direction:


TRACKING AREA UPDATE REQUEST
dual
UE to network