Procedure Transaction Id (PTI)

C

This IE shall be sent on the S5/S8 and S4/S11 interfaces when the procedure was initiated by a UE Requested Bearer Resource Modification Procedure or UE Requested Bearer Resource Allocation Procedure (see NOTE 1) or Secondary PDP Context Activation Procedure.

The PTI shall be the same as the one used in the corresponding Bearer Resource Command.

PTI

0

Linked EPS Bearer ID (LBI)

M

This IE shall be included to indicate the default bearer associated with the PDN connection.

EBI

0

Protocol Configuration Options (PCO)

O

This IE may be sent on the S5/S8 and S4/S11 interfaces if ePCO is not supported by the UE or the network.

PCO

0

Bearer Contexts

M

Several IEs with this type and instance values shall be included as necessary to represent a list of Bearers.

Bearer Context

0

PGW-FQ-CSID

C

This IE shall be included by the PGW on the S5/S8 and S2a/S2b interfaces and, when received from S5/S8 be forwarded by the SGW on the S11 interface according to the requirements in 3GPP TS 23.007 [17].

FQ-CSID

0

SGW-FQ-CSID

C

This IE shall be included by the SGW on the S11 interface according to the requirements in 3GPP TS 23.007 [17].

FQ-CSID

1

Change Reporting Action

C

This IE shall be included on the S5/S8 and S4/S11 interfaces with the appropriate Action field If the location Change Reporting mechanism is to be started or stopped for this subscriber in the SGSN/MME.

Change Reporting Action

0

CSG Information Reporting Action

CO

This IE shall be included on the S5/S8 and S4/S11 interfaces with the appropriate Action field if the CSG Info reporting mechanism is to be started or stopped for this subscriber in the SGSN/MME.

CSG Information Reporting Action

0

H(e)NB Information Reporting

CO

This IE shall be included on the S5/S8 and S4/S11 interfaces with the appropriate Action field if H(e)NB information reporting is to be started or stopped for the PDN connection in the SGSN/MME.

H(e)NB Information Reporting

0

Presence Reporting Area Action

CO

This IE shall be included on the S5/S8 and S11/S4 interfaces with the appropriate Action field if reporting changes of UE presence in a Presence Routing Area is to be started, stopped or modified for this subscriber in the MME/SGSN.

Several IEs with the same type and instance value may be included as necessary to represent a list of Presence Reporting Area Actions. One IE shall be included per PRA to be started, stopped or modified.

Presence Reporting Area Action

0

Indication Flags

CO

This IE shall be included if any one of the applicable flags is set to 1.

Applicable flags are:

• Associate OCI with PGW node’s identity: The PGW shall set this flag to 1 on the S5/S8 interface or S2a/S2b interface if it has included the "PGW’s Overload Control Information" and if this information is to be associated with the node identity (i.e. FQDN or the IP address received from the HSS or DNS during the PGW selection) of the serving PGW. The SGW shall set this flag on the S11/S4 interface if it supports the overload control feature and if the flag is set on the S5/S8 interface.
• Associate OCI with SGW node’s identity: The SGW shall set this flag to 1 on the S11/S4 interface if it has included the "SGW’s Overload Control Information" and if this information is to be associated with the node identity (i.e. FQDN or the IP address received from the DNS during the SGW selection) of the serving SGW.
• Extended EBI Value Range Support Indication: The PGW shall set this flag to "1" if it supports the 15 EPS Bearers.

Indication

0

PGW’s node level Load Control Information

O

The PGW may include this IE on the S5/S8 or S2a/S2b interface, providing its node level load information, if the load control feature is supported by the PGW and is activated for the PLMN to which the access network node, i.e. MME/S4-SGSN for 3GPP access network, ePDG/TWAN for non-3GPP access network, belongs (see clause 12.2.6).

Load Control Information

0

CO

If the SGW receives this IE and if it supports the load control feature, it shall forward it to the MME/S4-SGSN on the S11/S4 interface.

PGW’s APN level Load Control Information

O

The PGW may include this IE on the S5/S8 or S2a/S2b interface, providing APN level load information, if the APN level load control feature is supported by the PGW and is activated for the PLMN to which the access network node, i.e. MME/S4-SGSN for 3GPP access network, ePDG/TWAN for non-3GPP access based network, belongs (see clause 12.2.6).

When present, the PGW shall provide one or more instances of this IE, up to maximum of 10, with the same type and instance value, each representing the load information for a list of APN(s).

See NOTE 2, NOTE 4.

Load Control Information

1

CO

If the SGW receives this IE and if it supports APN level load control feature, it shall forward it to the MME/S4-SGSN on the S11/S4 interface.

SGW’s node level Load Control Information

O

The SGW may include this IE, over the S11/S4 interface if the load control feature is supported by the SGW and is activated in the network (see clause 12.2.6).

When present, the SGW shall provide only one instance of this IE, representing its node level load information.

Load Control Information

2

PGW’s Overload Control Information

O

During an overload condition, the PGW may include this IE on the S5/S8 or S2a/S2b interface, if the overload control feature is supported by the PGW and is activated for the PLMN to which the access network node, i.e. MME/S4-SGSN for 3GPP access based network, ePDG/TWAN for non-3GPP access based network, belongs (see clause 12.3.11).

When present, the PGW shall provide

• node level overload control, in one instance of this IE; and/or
• APN level overload control, in one or more instances of this IE, up to maximum of 10, with the same type and instance value, each representing the overload information for a list of APN(s).

See NOTE 3, NOTE 5.

Overload Control Information

0

CO

If the SGW receives this IE and if it supports the overload control feature, it shall forward it to the MME/S4-SGSN on the S11/S4 interface.

SGW’s Overload Control Information

O

During an overload condition, the SGW may include this IE over the S11/S4 interface if the overload control feature is supported by the SGW and is activated in the network (see clause 12.3.11).

When present, the SGW shall provide only one instance of this IE, representing its overload information.

Overload Control Information

1

NBIFOM Container

CO

This IE shall be included on the S5/S8 and S2a/S2b interfaces if the PGW needs to send NBIFOM information as specified in 3GPP TS 23.161 [71]. The Container Type shall be set to 4.

F-Container

0

CO

If the SGW receives a NBIFOM Container IE from the PGW, the SGW shall forward it to the MME/S4-SGSN on the S11/S4 interface.

PGW Change Info

CO

This IE may be included on S5/S8/S2b if the PGW needs to change the PGW Change Info. It shall be included by the PGW if the PGW S5/S8/S2b IP Address for the control plane for the PDN connection is required to be changed (see PGW triggered PDN connection restoration in clauses 31.4 and 31.4B of 3GPP TS 23.007 [17]).

The SGW shall transparently forward this IE over the S11 interface.

Several IEs with the same IE type and Instance may be present to request the MME/ePDG to re-establish PDN connections associated with either different FQ-CSIDs, or Group Ids or PGW-C/SMF IP addresses to different PGW-C/SMFs.

PGW Change Info

0

Private Extension

O

This IE may be sent on the S5/S8, S4/S11 and S2a/S2b interfaces.

Private Extension

VS

NOTE 1: This message refers to the UE requested bearer resource allocation procedure and UE requested bearer resource modification procedures defined in 3GPP TS 24.301 [23], both are specified in 3GPP TS 23.401 [3] in the clause "UE requested bearer resource modification".

NOTE 2: The receiver, not supporting the APN level load control feature, shall ignore all the occurrence(s) of this IE, i.e. "Load Control Information" IE with instance number "1". The receiver, supporting the APN level load control feature and supporting the APN level load information for the maximum of 10 APNs, shall handle the APN level load information for the first 10 APNs and ignore any more APN level load information.

NOTE 3: The receiver, supporting the APN level overload information for the maximum of 10 APNs, shall handle the APN level overload information for the first 10 APNs and ignore any more APN level overload information.

NOTE 4: The APN level load information, provided within and across different instances of the "PGW’s APN level Load Control Information" IE(s) shall be limited to 10 different APNs.

NOTE 5: The APN level overload information, provided within and across different instances of the "PGW’s Overload Control Information" IE(s) shall be limited to 10 different APNs.

Octets 2 and 3

Length = n

Octets 4

Spare and Instance fields

Information elements

P

Condition / Comment

IE Type

Ins.

EPS Bearer ID

M

This IE shall be set to 0.

EBI

0

TFT

M

This IE can contain both uplink and downlink packet filters to be sent to the UE or the TWAN/ePDG.

Bearer TFT

0

S1-U SGW F-TEID

C

This IE shall be sent on the S11 interface if the S1-U interface is used.

If SGW supports both IPv4 and IPv6, it shall send both an IPv4 address and an IPv6 address within the S1-U SGW F-TEID IE.

See NOTE 1.

F-TEID

0

S5/8-U PGW F-TEID

C

This IE shall be sent on the S4, S5/S8 and S11 interfaces for GTP-based S5/S8 interface. The MME/SGSN shall ignore the IE on S11/S4 for PMIP-based S5/S8 interface.

F-TEID

1

S12 SGW F-TEID

C

This IE shall be sent on the S4 interface if the S12 interface is used. See NOTE 1.

F-TEID

2

S4-U SGW F-TEID

C

This IE shall be sent on the S4 interface if the S4-U interface is used. See NOTE 1.

F-TEID

3

S2b-U PGW F-TEID

C

This IE (for user plane) shall be sent on the S2b interface.

F-TEID

4

S2a-U PGW F-TEID

C

This IE (for user plane) shall be sent on the S2a interface.

F-TEID

5

Bearer Level QoS

M

Bearer QoS

0

Charging Id

C

This IE shall be sent on the S5/S8 interface.

Charging Id

0

O

If the S5/S8 interface is GTP, this IE may be sent on the S4 interface, in order to support CAMEL charging at the SGSN.

CO

This IE shall be sent on the S2a/S2b interface.

Bearer Flags

O

Applicable flags are:

• PPC (Prohibit Payload Compression) : this flag may be set on the S5/S8 and S4 interfaces.
• vSRVCC indicator: This IE may be included by the PGW on the S5/S8 interface according to 3GPP TS 23.216 [43]. When received from S5/S8, SGW shall forward on the S11 interface.

Bearer Flags

0

Protocol Configuration Options (PCO)

O

This IE may be sent on the S5/S8 and S4/S11 interfaces if ePCO is not supported by the UE or the network. This bearer level IE takes precedence over the PCO IE in the message body if they both exist.

PCO

0

Extended Protocol Configuration Options (ePCO)

O

This IE may be sent on the S5/S8 and S11 interfaces if the UE and the network support ePCO.

ePCO

0

Maximum Packet Loss Rate

O

This IE may be included on the S5/S8 interfaces if the PGW needs to send Maximum Packet Loss Rate as specified in clause 5.4.1 of 3GPP TS 23.401 [3]. This IE is only applicable for QCI 1.

Maximum Packet Loss Rate

0

CO

If the SGW receives this IE, it shall forward it to the MME on the S11 interface

NOTE 1: The SGW shall use the same F-TEID IP address and TEID values for S1-U, S4-U and S12 interfaces.

Octets 2 and 3

Length = n

Octet 4

Spare and Instance fields

Information elements

P

Condition / Comment

IE Type

Ins.

Load Control Sequence Number

M

See clause 12.2.5.1.2.1 for the description and use of this parameter.

Sequence Number

0

Load Metric

M

See clauses 12.2.5.1.2.2 and 12.2.5.1.2.3 for the description and use of this parameter.

Metric

0

List of APN and Relative Capacity

CO

The IE shall (only) be present in the "PGW’s APN level Load Control Information" IE.

For indicating the APN level load, the PGW shall include one or more instances of this IE, up to maximum of 10, with the same type and instance value, representing a list of APN(s) & its respective "Relative Capacity" (sharing the same "Load Metric").

See clause 12.2.5.1.2.3 for the description and use of this parameter.

See NOTE 1.

APN and Relative Capacity

0

NOTE 1: If more than 10 occurrences of "APN and Relative Capacity" IE are received within one instance of the Load Control Information IE, the receiver shall treat it as a protocol error and ignore the entire Load Control Information IE instance.

Octets 2 and 3

Length = n

Octet 4

Spare and Instance fields

Information elements

P

Condition / Comment

IE Type

Ins.

Overload Control Sequence Number

M

See clause 12.3.5.1.2.1 for the description and use of this parameter.

Sequence Number

0

Overload Reduction Metric

M

See clauses 12.3.5.1.2.3 and 12.3.5.1.2.4 for the description and use of this parameter.

Metric

0

Period of Validity

M

See clause 12.3.5.1.2.2 for the description and use of this parameter.

This IE should be set to "0" if the "Overload Reduction Metric" is null. This IE shall be ignored by the receiver if the "Overload Reduction Metric" is null.

EPC Timer

0

List of Access Point Name (APN)

CO

The IE may (only) be present in the "PGW’s Overload Control Information" IE.

For indicating the APN level overload, the PGW shall include one or more instances of this IE, up to maximum of 10, with the same type and instance value, representing a list of APN(s) (sharing the same "Overload Reduction Metric" and "Period of Validity").

See NOTE 1.

APN

0

NOTE 1: If more than 10 occurrences of APNs are received within one instance of the Overload Control Information IE, the receiver shall treat it as a protocol error and ignore the entire Overload Control Information IE instance.

Octets 2 and 3

Length = n

Octet 4

Spare and Instance fields

Information elements

P

Condition / Comment

IE Type

Ins.

PGW Set FQDN

O

This IE may be included by a PGW if the PGW set FQDN is changed.

PGW FQDN

0

Alternative PGW-C/SMF IP Address

O

This IE may be included by a PGW if the list of alternative PGW-C/SMF IP addresses is changed.

Several IEs with the same type and instance value may be included to represent a list of Alternative PGW-C/SMF IP Addresses.

IP Address

0

Alternative PGW-C/SMF FQDN

O

This IE may be included by a PGW if the list of alternative PGW-C/SMF FQDNs is changed.

Several IEs with the same type and instance value may be included to represent a list of Alternative PGW-C/SMF FQDNs.

PGW FQDN

1

New PGW-C/SMF IP Address

C

This IE shall be included by a PGW if the PGW S5/S8/S2b IP Address for the control plane for the PDN connection is required to be changed (see PGW triggered PDN connection restoration in clauses 31.4 and 31.4B and 31.6.3 of 3GPP TS 23.007 [17]).

IP Address

1

New SGW-C IP Address

O

This IE may be included by a combined SGW/PGW to contain the SGW-C S11 IP address (pertaining to the combined SGW/PGW sending the PGW Change Info IE). The MME should use this information when deciding to which SGW-C S11 IP address should the Create Session Request message be sent, during a combined SGW-C/PGW-C/SMF triggered restoration procedure as specified in clauses 31.4a and 31.6.3A of 3GPP TS 23.007 [17].

IP Address

3

PGW-C/SMF FQ-CSID

C

This IE shall be included if the New PGW-C/SMF IP Address IE is present and if the PGW-C/SMF requests the MME/ePDG to re-establish all the PDN connections associated with a PGW-C/SMF FQ-CSID towards the PGW-C indicated in New PGW-C/SMF IP Address IE.

When present, it shall contain the PGW-C/SMF FQ-CSID for which the PDN connections are requested to be re-established.

Several IEs with the same IE type may be present to represent several FQ-CSIDsof PDN connections that need to be moved to the New PGW-C/SMF IP Address.

See also clause 31.6 of 3GPP TS 23.007 [17].

FQ-CSID

0

Group Id

C

This IE shall be included if the New PGW-C/SMF IP Address IE is present and if the PGW-C/SMF requests the MME/ePDG to re-establish all the PDN connections associated with a Group Id towards the PGW-C indicated in New PGW-C/SMF IP Address IE.

When present, it shall contain the Group Id for which the PDN connections are requested to be re-established.

Several IEs with the same IE type may be present to represent several Group Ids of PDN connections that need to be moved to the New PGW-C/SMF IP Address.

See also clause 31.6 of 3GPP TS 23.007 [17].

Group Id

0

PGW Control Plane IP Address

C

This IE shall be included if the New PGW-C/SMF IP Address IE is present and if the PGW-C/SMF requests the MME/ePDG to re-establish all the PDN connections of which PGW S5/S8/ S2a/S2b F-TEID contains the PGW Control Plane IP Address towards the PGW-C indicated in New PGW-C/SMF IP Address IE.

Several IEs with the same IE type may be present to represent several PGW-C/SMF IP addresses of PDN connections that need to be moved to the New PGW-C/SMF IP Address.

See also clause 31.6 of 3GPP TS 23.007 [17].

IP Address

2

New Group Id

O

The IE may be present if the PGW-C/SMF wants to allocate a new Group Id for the PDN connection. When present, this IE shall identify the new Group Id to which the PDN connection pertains, and the MME/ePDG shall replace any earlier Group ID received for the PDN connection with the new Group ID. If absent, the Group ID associated earlier to the PDN connection, if any, shall remain unchanged.

See also clause 31.6 of 3GPP TS 23.007 [17].

Group Id

1