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Content for  TS 24.501  Word version:  17.5.0

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8.3  5GS session management messagesWord‑p. 621

8.3.1  PDU session establishment requestWord‑p. 621

8.3.1.1  Message definitionWord‑p. 621

The PDU SESSION ESTABLISHMENT REQUEST message is sent by the UE to the SMF to initiate establishment of a PDU session. See Table 8.3.1.1.1.
Message type:
PDU SESSION ESTABLISHMENT REQUEST
Significance:
dual
Direction:
UE to network
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION ESTABLISHMENT REQUEST message identityMessage type
9.7
MV1
Integrity protection maximum data rateIntegrity protection maximum data rate
9.11.4.7
MV2
9-PDU session typePDU session type
9.11.4.11
OTV1
A-SSC modeSSC mode
9.11.4.16
OTV1
285GSM capability5GSM capability
9.11.4.1
OTLV3-15
55Maximum number of supported packet filtersMaximum number of supported packet filters
9.11.4.9
OTV3
B-Always-on PDU session requestedAlways-on PDU session requested
9.11.4.4
OTV1
39SM PDU DN request containerSM PDU DN request container
9.11.4.15
OTLV3-255
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
66IP header compression configurationIP header compression configuration
9.11.4.24
OTLV5-257
6EDS-TT Ethernet port MAC addressDS-TT Ethernet port MAC address
9.11.4.25
OTLV8
6FUE-DS-TT residence timeUE-DS-TT residence time
9.11.4.26
OTLV10
74Port management information containerPort management information container
9.11.4.27
OTLV-E8-65538
1FEthernet header compression configurationEthernet header compression configuration
9.11.4.28
OTLV3
29Suggested interface identifierPDU address
9.11.4.10
OTLV11
7CService-level-AA containerService-level-AA container
9.11.2.10
OTLV-E6-n
23Requested MBS containerRequested MBS container
9.11.4.30
OTLV7-n
34PDU session pair IDPDU session pair ID
9.11.4.32
OTLV3
35RSNRSN
9.11.4.33
OTLV3
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8.3.1.2  PDU session typeWord‑p. 622

This IE shall be included in the message when the UE requests to establish a new PDU session.

8.3.1.3  SSC modeWord‑p. 622

This IE is included in the message when the UE requests to establish a new PDU session with a DN and requests an SSC mode.

8.3.1.4  Maximum number of supported packet filtersWord‑p. 623

This IE shall be included in the message when the selected PDU session type is "IPv4", "IPv6", "IPv4v6" or "Ethernet" and the UE can support more than 16 packet filters for this PDU session.

8.3.1.5  5GSM capabilityWord‑p. 623

This IE is included in the message when the UE requests to establish a new PDU session or to transfer an existing PDN connection and any of the 5GSM capabilities supported by the UE is relevant for the PDU session.

8.3.1.6Void

8.3.1.7  Always-on PDU session requestedWord‑p. 623

The UE shall include this IE if the UE requests to establish a PDU session as an always-on PDU session.

8.3.1.8  SM PDU DN request containerWord‑p. 623

This IE is included in the message when the UE requests to establish a new PDU session with a DN and needs to provide information for the PDU session authentication and authorization by the external DN.

8.3.1.9  Extended protocol configuration optionsWord‑p. 623

This IE is included in the message when the UE needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network.

8.3.1.10  IP header compression configuration |R16|Word‑p. 623

The UE shall include the IP header compression configuration IE if:
  • the PDU session type value of the PDU session type IE is set to "IPv4", "IPv6" or "IPv4v6";
  • the UE indicates "Control Plane CIoT 5GS optimization supported" and "IP header compression for control plane CIoT 5GS optimization supported" in the 5GMM capability IE of the REGISTRATION REQUEST message; and
  • the network indicates "Control plane CIoT 5GS optimization supported" and "IP header compression for control plane CIoT 5GS optimization supported" in the 5GS network support feature IE of the REGISTRATION ACCEPT message.
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8.3.1.11  DS-TT Ethernet port MAC address |R16|Word‑p. 623

This IE shall be included in the message if the UE supports transfer of port management information containers and the UE requests to establish a new PDU session of "Ethernet" PDU session type.

8.3.1.12  UE-DS-TT residence time |R16|Word‑p. 623

This IE shall be included in the message if:
  1. the UE supports transfer of port management information containers; and
  2. the UE-DS-TT residence time is available at the UE.

8.3.1.13  Port management information container |R16|Word‑p. 623

This IE shall be included in the message if the UE supports transfer of port management information containers.

8.3.1.14  Ethernet header compression configuration |R16|Word‑p. 624

The UE shall include the Ethernet header compression configuration IE if:
  • the PDU session type value of the PDU session type IE is set to "Ethernet";
  • the UE indicated "Control Plane CIoT 5GS optimization supported" and "Ethernet header compression for control plane CIoT 5GS optimization supported" in the 5GMM capability IE of the REGISTRATION REQUEST message; and
  • the network indicated "Control plane CIoT 5GS optimization supported" and "Ethernet header compression for control plane CIoT 5GS optimization supported" in the 5GS network support feature IE of the REGISTRATION ACCEPT message.
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8.3.1.15  Suggested interface identifier |R16|Word‑p. 624

This IE may be included by the W-AGF acting on behalf of the FN-RG.

8.3.1.16  Service-level-AA container |R17|Word‑p. 624

This IE shall be included in the message when the UE needs to establish a PDU session for the UAS services.

8.3.1.17  Requested MBS container |R17|Word‑p. 624

This IE is included in the message when the UE requests to join one or more MBS sessions that are associated with the PDU session.

8.3.1.18  PDU session pair ID |R17|Word‑p. 624

This IE shall be included in the message when the UE needs to include a PDU session pair ID.

8.3.1.19  RSN |R17|Word‑p. 624

This IE shall be included in the message when the UE needs to include an RSN.

8.3.2  PDU session establishment acceptWord‑p. 624

8.3.2.1  Message definitionWord‑p. 624

The PDU SESSION ESTABLISHMENT ACCEPT message is sent by the SMF to the UE in response to PDU SESSION ESTABLISHMENT REQUEST message and indicates successful establishment of a PDU session. See Table 8.3.2.1.1.
Message type:
PDU SESSION ESTABLISHMENT ACCEPT
Significance:
dual
Direction:
network to UE
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION ESTABLISHMENT ACCEPT message identityMessage type
9.7
MV1
Selected PDU session typePDU session type
9.11.4.11
MV1/2
Selected SSC modeSSC mode
9.11.4.16
MV1/2
Authorized QoS rulesQoS rules
9.11.4.13
MLV-E6-65538
Session AMBRSession-AMBR
9.11.4.14
MLV7
595GSM cause5GSM cause
9.11.4.2
OTV2
29PDU addressPDU address
9.11.4.10
OTLV7-31
56RQ timer valueGPRS timer
9.11.2.3
OTV2
22S-NSSAIS-NSSAI
9.11.2.8
OTLV3-10
8-Always-on PDU session indicationAlways-on PDU session indication
9.11.4.3
OTV1
75Mapped EPS bearer contextsMapped EPS bearer contexts
9.11.4.8
OTLV-E7-65538
78EAP messageEAP message
9.11.2.2
OTLV-E7-1503
79Authorized QoS flow descriptionsQoS flow descriptions
9.11.4.12
OTLV-E6-65538
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
25DNNDNN
9.11.2.1B
OTLV3-102
175GSM network feature support5GSM network feature support
9.11.4.18
OTLV3-15
18Serving PLMN rate controlServing PLMN rate control
9.11.4.20
OTLV4
77ATSSS containerATSSS container
9.11.4.22
OTLV-E3-65538
C-Control plane only indicationControl plane only indication
9.11.4.23
OTV1
66IP header compression configurationIP header compression configuration
9.11.4.24
OTLV5-257
1FEthernet header compression configurationEthernet header compression configuration
9.11.4.28
OTLV3
7CService-level-AA containerService-level-AA container
9.11.2.10
OTLV-E6-n
33Received MBS containerReceived MBS container
9.11.4.31
OTLVTBD
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8.3.2.2  5GSM causeWord‑p. 625

This IE is included when the selected PDU session type is different from the PDU session type requested by the UE.

8.3.2.3  PDU addressWord‑p. 626

This IE is included when the selected PDU session type is "IPv4", "IPv6" or "IPv4v6".

8.3.2.4  RQ timer valueWord‑p. 626

This IE is included when the network needs to provide the RQ timer value.

8.3.2.5  S-NSSAIWord‑p. 626

This IE shall be included in the message when the SMF received from the AMF an S-NSSAI together with the PDU SESSION ESTABLISHMENT REQUEST message, the PDU session is a non-emergency PDU session and the UE is not registered for onboarding services in SNPN.

8.3.2.6  Always-on PDU session indicationWord‑p. 626

The network shall include this IE if the network decides to inform the UE whether the PDU session is established as an always-on PDU session.

8.3.2.7  Mapped EPS bearer contextsWord‑p. 626

This IE is included when interworking with EPS is supported for the PDU session.

8.3.2.8  EAP messageWord‑p. 626

This IE is included when the external DN successfully performed authentication and authorization of the UE using EAP.

8.3.2.9  Authorized QoS flow descriptionsWord‑p. 626

This IE is included when the network needs to provide authorized QoS flow descriptions.

8.3.2.10  Extended protocol configuration optionsWord‑p. 626

This IE is included in the message when the network needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE.

8.3.2.11  DNNWord‑p. 626

The IE shall be included in the message when the PDU session is a non-emergency PDU session and the UE is not registered for onboarding services in SNPN.

8.3.2.12  5GSM network feature support |R16|Word‑p. 626

This IE is included when the network needs to indicate support of 5GSM network features.

8.3.2.13Void

8.3.2.14  Serving PLMN rate control |R16|Word‑p. 626

This IE shall be included when the network needs to indicate the maximum uplink control plane user data the UE is allowed to send per 6 minute interval.

8.3.2.15  ATSSS container |R16|Word‑p. 626

The IE shall be included in the message when the PDU session is an MA PDU session.

8.3.2.16  Control plane only indication |R16|Word‑p. 627

The network shall include the control plane only indication IE if the network determines that the associated PDU session is only for control plane CIoT 5GS optimization.

8.3.2.17  IP header compression configuration |R16|Word‑p. 627

The SMF may include the IP header compression configuration IE if:
  • the network accepts an IP PDU session type;
  • control plane CIoT 5GS optimization is selected; and
  • the UE provided the IP header compression configuration IE in the PDU SESSION ESTABLISHMENT REQUEST message.

8.3.2.18  Ethernet header compression configuration |R16|Word‑p. 627

The SMF may include the Ethernet header compression configuration IE if:
  • the network accepts an Ethernet PDU session type;
  • control plane CIoT 5GS optimization is selected; and
  • the UE provided the Ethernet header compression configuration IE in the PDU SESSION ESTABLISHMENT REQUEST message.

8.3.2.19  Service-level-AA container |R17|Word‑p. 627

The SMF shall include the Service-level-AA container IE if the Service-level authentication and authorization procedure is completed successfully by the external DN.

8.3.2.20  Received MBS container |R17|Word‑p. 627

The network shall include this IE if the UE has requested to join one or more MBS sessions.

8.3.3  PDU session establishment rejectWord‑p. 627

8.3.3.1  Message definitionWord‑p. 627

The PDU SESSION ESTABLISHMENT REJECT message is sent by the SMF to the UE in response to PDU SESSION ESTABLISHMENT REQUEST message and indicates unsuccessful establishment of a PDU session. See Table 8.3.3.1.1.
Message type:
PDU SESSION ESTABLISHMENT REJECT
Significance:
dual
Direction:
network to UE
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION ESTABLISHMENT REJECT message identityMessage type
9.7
MV1
5GSM cause5GSM cause
9.11.4.2
MV1
37Back-off timer valueGPRS timer 3
9.11.2.5
OTLV3
F-Allowed SSC modeAllowed SSC mode
9.11.4.5
OTV1
78EAP messageEAP message
9.11.2.2
OTLV-E7-1503
615GSM congestion re-attempt indicator5GSM congestion re-attempt indicator
9.11.4.21
OTLV3
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
1DRe-attempt indicatorRe-attempt indicator
9.11.4.17
OTLV3
7CService-level AA containerService-level-AA container
9.11.2.10
OTLV-E6-n
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8.3.3.2  Back-off timer valueWord‑p. 628

The network may include this IE if the 5GSM cause is not #28 "unknown PDU session type", #39 "reactivation requested", #46 "out of LADN service area", #50 "PDU session type IPv4 only allowed", #51 "PDU session type IPv6 only allowed", #54 "PDU session does not exist", #57 "PDU session type IPv4v6 only allowed", #58 "PDU session type Unstructured only allowed", #61 "PDU session type Ethernet only allowed", or #68 "not supported SSC mode", to request a minimum time interval before procedure retry is allowed.
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8.3.3.3  Allowed SSC modeWord‑p. 628

This IE is included when the network rejects the PDU SESSION ESTABLISHMENT REQUEST with cause #68 "not supported SSC mode.

8.3.3.4  EAP messageWord‑p. 628

This IE is included when the external DN unsuccessfully performed authentication and authorization of the UE using EAP.

8.3.3.4A  5GSM congestion re-attempt indicator |R16|Word‑p. 628

The network may include this IE only if it includes the Back-off timer value IE and the 5GSM cause value is either #67 "insufficient resources for specific slice and DNN" or #69 "insufficient resources for specific slice".

8.3.3.5  Extended protocol configuration optionsWord‑p. 628

This IE is included in the message when the network needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE.

8.3.3.6  Re-attempt indicatorWord‑p. 629

The network may include this IE if the network includes the Back-off timer value IE and the 5GSM cause value is not #26 "insufficient resources", #28 "unknown PDU session type", #39 "reactivation requested", #46 "out of LADN service area", #54 "PDU session does not exist", #67 "insufficient resources for specific slice and DNN", #68 "not supported SSC mode", or #69 "insufficient resources for specific slice".
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8.3.3.7  Service-level-AA container |R17|Word‑p. 629

The network shall include this IE if the service-level authentication and authorization procedure has completed unsuccessfully and the 5GSM cause is #29 "user authentication or authorization failed". The network shall include the service-level-AA response if provided by the DN in the service-level-AA container.

8.3.4  PDU session authentication commandWord‑p. 629

8.3.4.1  Message definitionWord‑p. 629

The PDU SESSION AUTHENTICATION COMMAND message is sent by the SMF to the UE for authentication of the UE establishing the PDU session or of the UE participating in the PDU session. See Table 8.3.4.1.1.
Message type:
PDU SESSION AUTHENTICATION COMMAND
Significance:
dual
Direction:
network to UE
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION AUTHENTICATION COMMAND message identityMessage type
9.7
MV1
EAP messageEAP message
9.11.2.2
MLV-E6-1502
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
Up

8.3.4.2  Extended protocol configuration optionsWord‑p. 629

This IE is included in the message when the network needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE.

8.3.5  PDU session authentication completeWord‑p. 629

8.3.5.1  Message definitionWord‑p. 629

The PDU SESSION AUTHENTICATION COMPLETE message is sent by the UE to the SMF in response to the PDU SESSION AUTHENTICATION COMMAND message and indicates acceptance of the PDU SESSION AUTHENTICATION COMMAND message. See Table 8.3.5.1.1.
Message type:
PDU SESSION AUTHENTICATION COMPLETE
Significance:
dual
Direction:
UE to network
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION AUTHENTICATION COMPLETE message identityMessage type
9.7
MV1
EAP messageEAP message
9.11.2.2
MLV-E6-1502
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
Up

8.3.5.2  Extended protocol configuration optionsWord‑p. 630

This IE is included in the message when the UE needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network.

8.3.6  PDU session authentication resultWord‑p. 630

8.3.6.1  Message definitionWord‑p. 630

The PDU SESSION AUTHENTICATION RESULT message is sent by the SMF to the UE for indication of successful result of authentication of the UE participating in the PDU session. See Table 8.3.6.1.1.
Message type:
PDU SESSION AUTHENTICATION RESULT
Significance:
dual
Direction:
network to UE
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION AUTHENTICATION RESULT message identityMessage type
9.7
MV1
78EAP messageEAP message
9.11.2.2
OTLV-E7-1503
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
Up

8.3.6.2  EAP messageWord‑p. 631

This IE shall be included when the external DN performs authentication and authorization of the UE using EAP and it completes successfully.

8.3.6.3  Extended protocol configuration optionsWord‑p. 631

This IE is included in the message when the network needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE.

8.3.7  PDU session modification requestWord‑p. 631

8.3.7.1  Message definitionWord‑p. 631

The PDU SESSION MODIFICATION REQUEST message is sent by the UE to the SMF to request a modification of a PDU session. See Table 8.3.7.1.1.
Message type:
PDU SESSION MODIFICATION REQUEST
Significance:
dual
Direction:
UE to network
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION MODIFICATION REQUEST message identityMessage type
9.7
MV1
285GSM capability5GSM capability
9.11.4.1
OTLV3-15
595GSM cause5GSM cause
9.11.4.2
OTV2
55Maximum number of supported packet filtersMaximum number of supported packet filters
9.11.4.9
OTV3
B-Always-on PDU session requestedAlways-on PDU session requested
9.11.4.4
OTV1
13Integrity protection maximum data rateIntegrity protection maximum data rate
9.11.4.7
OTV3
7ARequested QoS rulesQoS rules
9.11.4.13
OTLV-E7-65538
79Requested QoS flow descriptionsQoS flow descriptions
9.11.4.12
OTLV-E6-65538
75Mapped EPS bearer contextsMapped EPS bearer contexts
9.11.4.8
OTLV-E7-65538
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
74Port management information containerPort management information container
9.11.4.27
OTLV-E4-65538
66IP header compression configurationHeader compression configuration
9.11.4.24
OTLV5-257
1FEthernet header compression configurationEthernet header compression configuration
9.11.4.28
OTLV3
23Requested MBS containerRequested MBS container
9.11.4.30
OTLV7-n
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8.3.7.2  5GSM capabilityWord‑p. 632

This IE is included in the message:
  1. for a PDN connection established when in S1 mode, after an inter-system change from S1 mode to N1 mode, if the UE is a UE operating in single-registration mode in a network supporting N26 interface, the UE has not previously successfully performed the UE-requested PDU session modification to provide this capability, and:
    1. if the PDU session is of "IPv4", "IPv6", "IPv4v6" or "Ethernet" PDU session type, and the UE supports reflective QoS; or
    2. if the PDU session is of "IPv6" or "IPv4v6" PDU session type, and the UE supports multi-homed IPv6 PDU session; or
  2. if the UE needs to revoke the previously indicated support of reflective QoS.
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8.3.7.3  5GSM causeWord‑p. 633

This IE is included in the message to indicate the reason for the deletion of one or more non-default QoS rules, QoS flow descriptions or mapped EPS bearer contexts.

8.3.7.4  Maximum number of supported packet filtersWord‑p. 633

This IE shall be included in the message for a PDN connection established when in S1 mode, after an inter-system change from S1 mode to N1 mode, if the UE is a UE operating in single-registration mode in a network supporting N26 interface, the UE has not previously successfully performed the UE-requested PDU session modification to provide this capability, the PDU session type is "IPv4", "IPv6", "IPv4v6" or "Ethernet", and the UE can support more than 16 packet filters for this PDU session.
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8.3.7.5  Always-on PDU session requestedWord‑p. 633

This IE shall be included in the message for a PDN connection established when in S1 mode, after an inter-system change from S1 mode to N1 mode, if the UE is a UE operating in single-registration mode in a network supporting N26 interface, the UE has not previously successfully performed the UE-requested PDU session modification to provide this capability, and the UE requests the PDU session to be an always-on PDU session in the 5GS.

8.3.7.6  Integrity protection maximum data rateWord‑p. 633

This IE shall be included in the message for a PDN connection established when in S1 mode, after an inter-system change from S1 mode to N1 mode, if the UE is a UE operating in single-registration mode in a network supporting N26 interface, and the UE has not previously successfully performed the UE-requested PDU session modification to provide this capability.

8.3.7.7  Requested QoS rulesWord‑p. 633

This IE is included in the message when the UE requests a specific QoS handling.

8.3.7.8  Requested QoS flow descriptionsWord‑p. 633

This IE is included in the message when the UE requests a specific QoS flow descriptions.

8.3.7.9  Extended protocol configuration optionsWord‑p. 633

This IE is included in the message when the UE needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network.

8.3.7.10  Mapped EPS bearer contextsWord‑p. 633

This IE is included when the UE requests to delete one or more mapped EPS bearer contexts.

8.3.7.11  Port management information container |R16|Word‑p. 633

This IE shall be included when the UE needs to convey a port management information container.

8.3.7.12  IP header compression configuration |R16|Word‑p. 633

This IE is included in the message:
  1. if the UE wishes to re-negotiate IP header compression configuration associated to a PDU session and both the UE and the network supports Control plane CIoT 5GS optimization and IP header compression; or
  2. to negotiate IP header compression configuration associated to a PDU session after an inter-system change from S1 mode to N1 mode when both the UE and the network support control plane CIoT 5GS optimization and IP header compression, and the UE is operating in single-registration mode in the network supporting N26 interface.
Up

8.3.7.13  Ethernet header compression configuration |R16|Word‑p. 634

This IE is included in the message:
  1. if the UE wishes to re-negotiate Ethernet header compression configuration associated to a PDU session and both the UE and the network support Control plane CIoT 5GS optimization and Ethernet header compression; or
  2. to negotiate Ethernet header compression configuration associated to a PDU session after an inter-system change from S1 mode to N1 mode.

8.3.7.14  Requested MBS container |R17|Word‑p. 634

This IE is included in the message when the UE requests to join or leave one or more MBS sessions that are associated with the PDU session.

8.3.8  PDU session modification rejectWord‑p. 634

8.3.8.1  Message definitionWord‑p. 634

The PDU SESSION MODIFICATION REJECT message is sent by the SMF to the UE to indicate rejection of the PDU SESSION MODIFICATION REQUEST. See Table 8.3.8.1.1.
Message type:
PDU SESSION MODIFICATION REJECT
Significance:
dual
Direction:
network to UE
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION MODIFICATION REJECT message identityMessage type
9.7
MV1
5GSM cause5GSM cause
9.11.4.2
MV1
37Back-off timer valueGPRS timer 3
9.11.2.5
OTLV3
615GSM congestion re-attempt indicator5GSM congestion re-attempt indicator
9.11.4.21
OTLV3
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
1DRe-attempt indicatorRe-attempt indicator
9.11.4.17
OTLV3
Up

8.3.8.2  Back-off timer valueWord‑p. 634

The network may include this IE if the 5GSM cause is not #26 "insufficient resources", #37 "5GS QoS not accepted", #44 "Semantic errors in packet filter(s)", #45 "Syntactical error in packet filter(s)", #46 "out of LADN service area", #59 "unsupported 5QI value", #67 "insufficient resources for specific slice and DNN", #69 "insufficient resources for specific slice", #83 "Semantic error in the QoS operation", or #84 "Syntactical error in the QoS operation" to request a minimum time interval before procedure retry is allowed.
Up

8.3.8.2A  5GSM congestion re-attempt indicator |R16|Word‑p. 635

The network may include this IE only if it includes the Back-off timer value IE and the 5GSM cause value is either #67 "insufficient resources for specific slice and DNN" or #69 "insufficient resources for specific slice".

8.3.8.3  Extended protocol configuration optionsWord‑p. 635

This IE is included in the message when the network needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE.

8.3.8.4  Re-attempt indicatorWord‑p. 635

The network may include this IE only if it includes the Back-off timer value IE and the 5GSM cause value is not #26 "insufficient resources", #37 "5GS QoS not accepted", #44 "Semantic errors in packet filter(s)", #45 "Syntactical error in packet filter(s)", #46 "out of LADN service area", #59 "unsupported 5QI value", #67 "insufficient resources for specific slice and DNN", #69 "insufficient resources for specific slice", #83 "Semantic error in the QoS operation", or #84 "Syntactical error in the QoS operation".
Up

8.3.9  PDU session modification commandWord‑p. 635

8.3.9.1  Message definitionWord‑p. 635

The PDU SESSION MODIFICATION COMMAND message is sent by the SMF to the UE to indicate a modification of a PDU session. See Table 8.3.9.1.1
Message type:
PDU SESSION MODIFICATION COMMAND
Significance:
dual
Direction:
network to UE
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION MODIFICATION COMMAND message identityMessage type
9.7
MV1
595GSM cause5GSM cause
9.11.4.2
OTV2
2ASession AMBRSession-AMBR
9.11.4.14
OTLV8
56RQ timer valueGPRS timer
9.11.2.3
OTV2
8-Always-on PDU session indicationAlways-on PDU session indication
9.11.4.3
OTV1
7AAuthorized QoS rulesQoS rules
9.11.4.13
OTLV-E7-65538
75Mapped EPS bearer contextsMapped EPS bearer contexts
9.11.4.8
OTLV-E7-65538
79Authorized QoS flow descriptionsQoS flow descriptions
9.11.4.12
OTLV-E6-65538
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
77ATSSS containerATSSS container
9.11.4.22
OTLV-E3-65538
66IP header compression configurationIP header compression configuration
9.11.4.24
OTLV5-257
74Port management information containerPort management information container
9.11.4.27
OTLV-E4-65538
1EServing PLMN rate controlServing PLMN rate control
9.11.4.20
OTLV4
1FEthernet header compression configurationEthernet header compression configuration
9.11.4.28
OTLV3
33Received MBS containerReceived MBS container
9.11.4.31
OTLV7-n
7CService-level-AA containerService-level-AA container
9.11.2.10
OTLV-E6-n
Up

8.3.9.2  5GSM causeWord‑p. 636

This IE is included when the network performs the PDU session anchor relocation for SSC mode 3.

8.3.9.3  Session-AMBRWord‑p. 636

This IE is included when the session-AMBR of the PDU session is modified.

8.3.9.4  RQ timer valueWord‑p. 636

This IE is included when the network needs to provide the RQ timer value.

8.3.9.5  Always-on PDU session indicationWord‑p. 637

The network shall include this IE if the network decides to inform the UE whether the PDU session is an always-on PDU session.

8.3.9.6  Authorized QoS rulesWord‑p. 637

This IE is included when the authorized QoS rules of the PDU session are modified.

8.3.9.7  Mapped EPS bearer contextsWord‑p. 637

This IE is included when interworking with EPS is supported for the PDU session and the mapped EPS bearer contexts is modified.

8.3.9.8  Authorized QoS flow descriptionsWord‑p. 637

This IE is included when the authorized QoS flow descriptions of the PDU session are modified.

8.3.9.9  Extended protocol configuration optionsWord‑p. 637

This IE is included in the message when the network needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE.

8.3.9.10Void

8.3.9.11  ATSSS container |R16|Word‑p. 637

The IE is included in the message when the network needs to indicate that the ATSSS parameters of the MA PDU session are modified.

8.3.9.12  IP header compression configuration |R16|Word‑p. 637

This IE is included in the message if the network wishes to re-negotiate IP header compression configuration associated to a PDU session and both the UE and the network support Control plane CIoT 5GS optimization and IP header compression.

8.3.9.13  Port management information container |R16|Word‑p. 637

This IE shall be included when the network needs to convey a port management information container.

8.3.9.14  Serving PLMN rate control |R16|Word‑p. 637

This IE shall be included when the network needs to indicate the maximum uplink control plane user data the UE is allowed to send per 6 minute interval.

8.3.9.15  Ethernet header compression configuration |R16|Word‑p. 637

This IE is included in the message if the network wishes to re-negotiate Ethernet header compression configuration associated to a PDU session and both the UE and the network support Control plane CIoT 5GS optimization and Ethernet header compression.

8.3.9.16  Received MBS container |R17|Word‑p. 637

The network shall include this IE if:
  • the UE has requested to join or leave one or more MBS sessions;
  • the network wants to remove joined UE from one or more MBS sessions; or
  • the network wants to update the MBS service area of MBS session that the UE has joined.

8.3.9.17  Service-level-AA container |R17|Word‑p. 638

The SMF shall include the service-level-AA container IE if the service-level authentication and authorization procedure for re-authentication purpose is completed successfully by the external DN.

8.3.10  PDU session modification completeWord‑p. 638

8.3.10.1  Message definitionWord‑p. 638

The PDU SESSION MODIFICATION COMPLETE message is sent by the UE to the SMF in response to the PDU SESSION MODIFICATION COMMAND message and indicates an acceptance of the PDU SESSION MODIFICATION COMMAND message. See Table 8.3.10.1.1.
Message type:
PDU SESSION MODIFICATION COMPLETE
Significance:
dual
Direction:
UE to network
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION MODIFICATION COMPLETE message identityMessage type
9.7
MV1
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
74Port management information containerPort management information container
9.11.4.27
OTLV-E4-65538
Up

8.3.10.2  Extended protocol configuration optionsWord‑p. 638

This IE is included in the message when the UE needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network.

8.3.10.3  Port management information container |R16|Word‑p. 638

This IE shall be included when the UE needs to convey a port management information container.

8.3.11  PDU session modification command rejectWord‑p. 638

8.3.11.1  Message definitionWord‑p. 638

The PDU SESSION MODIFICATION COMMAND REJECT message is sent by the UE to the SMF to indicate rejection of the PDU SESSION MODIFICATION COMMAND message. See Table 8.3.11.1.1.
Message type:
PDU SESSION MODIFICATION COMMAND REJECT
Significance:
dual
Direction:
UE to network
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION MODIFICATION COMMAND REJECT message identityMessage type
9.7
MV1
5GSM cause5GSM cause
9.11.4.2
MV1
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
Up

8.3.11.2  Extended protocol configuration optionsWord‑p. 639

This IE is included in the message when the UE needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network.

8.3.12  PDU session release requestWord‑p. 639

8.3.12.1  Message definitionWord‑p. 639

The PDU SESSION RELEASE REQUEST message is sent by the UE to the SMF to request a release of a PDU session. See Table 8.3.12.1.1.
Message type:
PDU SESSION RELEASE REQUEST
Significance:
dual
Direction:
UE to network
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION RELEASE REQUEST message identityMessage type
9.7
MV1
595GSM cause5GSM cause
9.11.4.2
OTV2
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
Up

8.3.12.2  5GSM causeWord‑p. 639

This IE is included in the message to indicate the reason for releasing the PDU session.

8.3.12.3  Extended protocol configuration optionsWord‑p. 640

This IE is included in the message when the UE needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network.

8.3.13  PDU session release rejectWord‑p. 640

8.3.13.1  Message definitionWord‑p. 640

The PDU SESSION RELEASE REJECT message is sent by the SMF to the UE to indicate rejection of request a release of a PDU session. See Table 8.3.13.1.1.
Message type:
PDU SESSION RELEASE REJECT
Significance:
dual
Direction:
network to UE
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION RELEASE REJECT message identityMessage type
9.7
MV1
5GSM cause5GSM cause
9.11.4.2
MV1
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
Up

8.3.13.2  Extended protocol configuration optionsWord‑p. 640

This IE is included in the message when the network needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE.

8.3.14  PDU session release commandWord‑p. 640

8.3.14.1  Message definitionWord‑p. 640

The PDU SESSION RELEASE COMMAND message is sent by the SMF to the UE to indicate a release of a PDU session. See Table 8.3.14.1.1.
Message type:
PDU SESSION RELEASE COMMAND
Significance:
dual
Direction:
network to UE
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION RELEASE COMMAND message identityMessage type
9.7
MV1
5GSM cause5GSM cause
9.11.4.2
MV1
37Back-off timer valueGPRS timer 3
9.11.2.5
OTLV3
78EAP messageEAP message
9.11.2.2
OTLV-E7-1503
615GSM congestion re-attempt indicator5GSM congestion re-attempt indicator
9.11.4.21
OTLV3
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
D-Access typeAccess type
9.11.2.1A
OTV1
7CService-level-AA containerService-level-AA container
9.11.2.10
OTLV-E6-n
Up

8.3.14.2  Back-off timer valueWord‑p. 641

The network may include this IE to request a minimum time interval before procedure retry is allowed.

8.3.14.3  EAP messageWord‑p. 641

This IE is included when the external DN performs re-authentication and re-authorization of the UE using EAP and it completes unsuccessfully.

8.3.14.4  Extended protocol configuration optionsWord‑p. 641

This IE is included in the message when the network wants to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE.

8.3.14.5  5GSM congestion re-attempt indicatorWord‑p. 641

The network may include this IE only if it includes the Back-off timer value IE and the 5GSM cause value is either #67 "insufficient resources for specific slice and DNN" or #69 "insufficient resources for specific slice".

8.3.14.6  Access type |R16|Word‑p. 641

This IE is included in the message when the network releases user-plane reources of an MA PDU session specifically over either 3GPP access or non-3GPP access.

8.3.14.7  Service-level-AA container |R17|Word‑p. 641

The SMF shall include the service-level-AA container IE if the service-level authentication and authorization procedure for re-authentication purpose is completed unsuccessfully by the external DN.

8.3.15  PDU session release completeWord‑p. 642

8.3.15.1  Message definitionWord‑p. 642

The PDU SESSION RELEASE COMPLETE message is sent by the UE to the SMF in response to the PDU SESSION RELEASE COMMAND message and indicates an acceptance of a release of the PDU session. See Table 8.3.15.1.1.
Message type:
PDU SESSION RELEASE COMPLETE
Significance:
dual
Direction:
UE to network
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
PDU SESSION RELEASE COMPLETE message identityMessage type
9.7
MV1
595GSM cause5GSM cause
9.11.4.2
OTV2
7BExtended protocol configuration optionsExtended protocol configuration options
9.11.4.6
OTLV-E4-65538
Up

8.3.15.2  5GSM causeWord‑p. 642

This IE is included in the message when the UE needs to indicate to the network that an error encountered with a mandatory information element in the PDU SESSION RELEASE COMMAND message.

8.3.15.3  Extended protocol configuration optionsWord‑p. 642

This IE is included in the message when the UE needs to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network.

8.3.16  5GSM statusWord‑p. 642

8.3.16.1  Message definitionWord‑p. 642

The 5GSM STATUS message is sent by the SMF or the UE to pass information on the status of the indicated PDU session and report certain error conditions. See Table 8.3.16.1.1.
Message type:
5GSM STATUS
Significance:
dual
Direction:
both
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
5GSM STATUS message identityMessage type
9.7
MV1
5GSM cause5GSM cause
9.11.4.2
MV1
Up

8.3.17  Service-level authentication command |R17|Word‑p. 643

8.3.17.1  Message definitionWord‑p. 643

The SERVICE-LEVEL AUTHENTICATION COMMAND message is sent by the SMF to the UE for Service-level authentication and authorization procedure. See Table 8.3.17.1.1.
Message type:
SERVICE-LEVEL AUTHENTICATION COMMAND
Significance:
dual
Direction:
network to UE
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
SERVICE-LEVEL AUTHENTICATION COMMAND message identityMessage type
9.7
MV1
Service-level AA containerService-level-AA container
9.11.2.10
MLV-E5-n
Up

8.3.18  Service-level authentication complete |R17|Word‑p. 643

8.3.18.1  Message definitionWord‑p. 643

The SERVICE-LEVEL AUTHENTICATION COMPLETE message is sent by the UE to the SMF in response to the SERVICE-LEVEL AUTHENTICATION COMMAND message and indicates acceptance of the SERVICE-LEVEL AUTHENTICATION COMMAND message. See Table 8.3.18.1.1.
Message type:
SERVICE-LEVEL AUTHENTICATION COMPLETE
Significance:
dual
Direction:
UE to network
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
SERVICE-LEVEL AUTHENTICATION COMPLETE message identityMessage type
9.7
MV1
Service-level AA containerService-level-AA container
9.11.2.10
MLV-E5-n
Up

8.3.19  Remote UE report |R17|Word‑p. 644

8.3.19.1  Message definitionWord‑p. 644

The REMOTE UE REPORT message is sent by the UE to the network to report connection or disconnection of 5G ProSe remote UE(s). See Table 8.3.19.1.
Message type:
REMOTE UE REPORT
Significance:
dual
Direction:
UE to network
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
Remote UE report message identityMessage type
9.7
MV1
PPRemote UE context connectedRemote UE context list IE
9.11.4.29
OTLV-E16-65538
QQRemote UE context disconnectedRemote UE context list IE
9.11.4.29
OTLV-E16-65538
Up

8.3.19.2  Remote UE context connectedWord‑p. 644

This IE is included in the message by the UE acting as 5G ProSe layer-3 UE-to-network relay to provide the network with newly connected 5G ProSe remote UE information as specified in TS 23.304.

8.3.19.3  Remote UE context disconnectedWord‑p. 644

This IE is included in the message by the UE acting as 5G ProSe layer-3 UE-to-network relay to provide the network with disconnected 5G ProSe remote UE information as specified in TS 23.304.

8.3.20  Remote UE report response |R17|Word‑p. 645

8.3.20.1  Message definitionWord‑p. 645

The REMOTE UE REPORT RESPONSE message is sent by the network to the UE to acknowledge receipt of a remote UE report message. See Table 8.3.20.1.
Message type:
REMOTE UE REPORT RESPONSE
Significance:
dual
Direction:
network to UE
IEI Information Element Type/Reference Presence Format Length
Extended protocol discriminatorExtended protocol discriminator
9.2
MV1
PDU session IDPDU session identity
9.4
MV1
PTIProcedure transaction identity
9.6
MV1
Remote UE report response message identityMessage type
9.7
MV1
Up

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