Message Type value (Decimal)

Message

Applicability

Sxa

Sxb

Sxc

N4

0

Reserved

PFCP Node related messages

1

PFCP Heartbeat Request

X

X

X

X

2

PFCP Heartbeat Response

X

X

X

X

3

PFCP PFD Management Request

-

X

X

X

4

PFCP PFD Management Response

-

X

X

X

5

PFCP Association Setup Request

X

X

X

X

6

PFCP Association Setup Response

X

X

X

X

7

PFCP Association Update Request

X

X

X

X

8

PFCP Association Update Response

X

X

X

X

9

PFCP Association Release Request

X

X

X

X

10

PFCP Association Release Response

X

X

X

X

11

PFCP Version Not Supported Response

X

X

X

X

12

PFCP Node Report Request

X

X

X

X

13

PFCP Node Report Response

X

X

X

X

14

PFCP Session Set Deletion Request

X

X

-

15

PFCP Session Set Deletion Response

X

X

-

16 to 49

For future use

PFCP Session related messages

50

PFCP Session Establishment Request

X

X

X

X

51

PFCP Session Establishment Response

X

X

X

X

52

PFCP Session Modification Request

X

X

X

X

53

PFCP Session Modification Response

X

X

X

X

54

PFCP Session Deletion Request

X

X

X

X

55

PFCP Session Deletion Response

X

X

X

X

56

PFCP Session Report Request

X

X

X

X

57

PFCP Session Report Response

X

X

X

X

58 to 99

For future use

Other messages

100 to 255

For future use

Information elements

P

Condition / Comment

PDR ID

M

This IE shall uniquely identify the PDR among all the PDRs configured for that PFCP session.

Precedence

M

This IE shall indicate the PDR's precedence to be applied by the UP function among all PDRs of the PFCP session, when looking for a PDR matching an incoming packet.

PDI

M

This IE shall contain the PDI against which incoming packets will be matched.

See Table 7.5.2.2-2.

Outer Header Removal

C

This IE shall be present if the UP function is required to remove one or more outer header(s) from the packets matching this PDR.

FAR ID

C

This IE shall be present if the Activate Predefined Rules IE is not included or if it is included but it does not result in activating a predefined FAR.

When present this IE shall contain the FAR ID to be associated to the PDR.

URR ID

C

This IE shall be present if a measurement action shall be applied to packets matching this PDR.

When present, this IE shall contain the URR IDs to be associated to the PDR.

Several IEs within the same IE type may be present to represent a list of URRs to be associated to the PDR.

QER ID

C

This IE shall be present if a QoS enforcement or QoS marking action shall be applied to packets matching this PDR.

When present, this IE shall contain the QER IDs to be associated to the PDR. Several IEs within the same IE type may be present to represent a list of QERs to be associated to the PDR.

Activate Predefined Rules

C

This IE shall be present if Predefined Rule(s) shall be activated for this PDR. When present this IE shall contain one Predefined Rules name.

Several IEs with the same IE type may be present to represent multiple "Activate Predefined Rules" names.

Information elements

P

Condition / Comment

Source Interface

M

This IE shall identify the source interface of the incoming packet.

Local F-TEID

O

This IE shall not be present if Traffic Endpoint ID is present.

If present, this IE shall identify the local F-TEID to match for an incoming packet.

The CP function shall set the CHOOSE (CH) bit to 1 if the UP function supports the allocation of F-TEID and the CP function requests the UP function to assign a local F-TEID to the PDR.

Network Instance

O

This IE shall not be present if Traffic Endpoint ID is present.

If present, this IE shall identify the Network instance to match for the incoming packet. See NOTE 1, NOTE2.

UE IP address

O

This IE shall not be present if Traffic Endpoint ID is present.

If present, this IE shall identify the source or destination IP address to match for the incoming packet. (NOTE 5)

Traffic Endpoint ID

C

This IE may be present if the UP function has indicated the support of PDI optimization.

If present, this IE shall uniquely identify the Traffic Endpoint for that PFCP session.

SDF Filter

O

If present, this IE shall identify the SDF filter to match for the incoming packet. Several IEs with the same IE type may be present to provision a list of SDF Filters. The full set of applicable SDF filters, if any, shall be provided during the creation or the modification of the PDI.

See NOTE 3.

Octet 1 and 2

Create FAR IE Type = 3 (decimal)

Octets 3 and 4

Length = n

Information elements

P

Condition / Comment

FAR ID

M

This IE shall uniquely identify the FAR among all the FARs configured for that PFCP session.

Apply Action

M

This IE shall indicate the action to apply to the packets, See clauses 5.2.1 and 5.2.3.

Forwarding Parameters

C

This IE shall be present when the Apply Action requests the packets to be forwarded. It may be present otherwise.

When present, this IE shall contain the forwarding instructions to be applied by the UP function when the Apply Action requests the packets to be forwarded.

See table 7.5.2.3-2.

BAR ID

O

When present, this IE shall contain the BAR ID of the BAR defining the buffering instructions to be applied by the UP function when the Apply Action requests the packets to be buffered.

NOTE 1: The same user plane packets may be required, according to operator's policy and configuration, to be duplicated to different SX3LIFs.

Octet 1 and 2

Forwarding Parameters IE Type = 4 (decimal)

Octets 3 and 4

Length = n

Information elements

P

Condition / Comment

Destination Interface

M

This IE shall identify the destination interface of the outgoing packet.

Network Instance

O

When present, this IE shall identify the Network instance towards which to send the outgoing packet. See NOTE 1.

Redirect Information

C

This IE shall be present if the UP function is required to enforce traffic redirection towards a redirect destination provided by the CP function.

Outer Header Creation

C

This IE shall be present if the UP function is required to add one or more outer header(s) to the outgoing packet. If present, it shall contain the F-TEID of the remote GTP-U peer when adding a GTP-U/UDP/IP header, or the Destination IP address and/or Port Number when adding a UDP/IP header or an IP header or the C-TAG/S-TAG (for 5GC). See NOTE 2.

Information elements

P

Condition / Comment

CP F-SEID

C

This IE shall be present if the CP function decides to change its F-SEID for the PFCP session. The UP function shall use the new CP F-SEID for subsequent PFCP Session related messages for this PFCP Session. See Note 2.

Remove PDR

C

When present, this IE shall contain the PDR Rule which is requested to be removed. See Table 7.5.4-6-1.

Several IEs within the same IE type may be present to represent a list of PDRs to remove.

Remove FAR

C

When present, this IE shall contain the FAR Rule which is requested to be removed. See Table 7.5.4-7-1.

Several IEs within the same IE type may be present to represent a list of FARs to remove.

Remove URR

C

When present, this shall contain the URR Rule which is requested to be removed. See Table 7.5.4-8-1.

Several IEs within the same IE type may be present to represent a list of URRs to remove.

Remove QER

C

When present, this IE shall contain the QER Rule which is requested to be removed. See Table 7.5.4-9-1.

Several IEs within the same IE type may be present to represent a list of QERs to remove.

Remove BAR

C

When present, this IE shall contain the BAR Rule which is requested to be removed. See Table 7.5.4.12-1.

Remove Traffic Endpoint

C

When present, this IE shall contain the Traffic Endpoint ID identifying the traffic endpoint to be removed, if the UP function has indicated support of PDI optimization.

All the PDRs that refer to the removed Traffic Endpoint shall be deleted.

See Table 7.5.4.14-1.

Create PDR

C

This IE shall be present if the CP function requests the UP function to create a new PDR.

See Table 7.5.2.2-1.

Several IEs within the same IE type may be present to represent a list of PDRs to create.

Create FAR

C

This IE shall be present if the CP function requests the UP function to create a new FAR.See Table 7.5.2.3-1.

Several IEs within the same IE type may be present to represent a list of FARs to create.

Create URR

C

This IE shall be present if the CP function requests the UP function to create a new URR. See Table 7.5.2.4-1.

Several IEs within the same IE type may be present to represent a list of URRs to create.

Create QER

C

This IE shall be present if the CP function requests the UP function to create a new QER. See Table 7.5.2.5-1.

Several IEs within the same IE type may be present to represent a list of QERs to create.

Create BAR

C

This IE shall be present if the CP function requests the UP function to create a new BAR.

See Table 7.5.2.6-1.

Create Traffic Endpoint

C

When present this IE shall contain the information associated with the Traffic Endpoint to be created, if the UP function has indicated support of PDI optimization. See Table 7.5.2.7-1.

Update PDR

C

This IE shall be present if a PDR previously created for the PFCP session need to be modified. See Table 7.5.4.2-1.

Several IEs within the same IE type may be present to represent a list of PDRs to update.

Update FAR

C

This IE shall be present if a FAR previously created for the PFCP session need to be modified. See Table 7.5.4.3-1. Several IEs within the same IE type may be present to represent a list of FARs to update.

Update URR

C

This IE shall be present if URR(s) previously created for the PFCP session need to be modified.

Several IEs within the same IE type may be present to represent a list of modified URRs. Previously URRs that are not modified shall not be included. See Table 7.5.4.4-1.

Update QER

C

This IE shall be present if QER(s) previously created for the PFCP session need to be modified.

Several IEs within the same IE type may be present to represent a list of modified QERs.

Previously created QERs that are not modified shall not be included.

See Table 7.5.4.5-1.

Update BAR

C

This IE shall be present if a BAR previously created for the PFCP session needs to be modified.

A previously created BAR that is not modified shall not be included.

See Table 7.5.4.11-1.

Update Traffic Endpoint

C

When present this IE shall contain the information associated with the traffic endpoint to be updated, if the UP function has indicated support of PDI optimization.

All the PDRs that refer to the Traffic Endpoint shall use the updated Traffic Endpoint information.

See Table 7.5.4.13-1.

PFCPSMReq-Flags

C

This IE shall be included if at least one of the flags is set to "1".

- DROBU (Drop Buffered Packets): the CP function shall set this flag if the UP function is requested to drop the packets currently buffered for this PFCP session (see NOTE 1).

- QAURR (Query All URRs): the CP function shall set this flag if the CP function requests immediate usage report(s) for all the URRs previously provisioned for this PFCP session (see NOTE 3).

Query URR

C

This IE shall be present if the CP function requests immediate usage report(s) to the UP function.

Several IEs within the same IE type may be present to represent a list of URRs for which an immediate report is requested.

See Table 7.5.4.10-1.

See NOTE 3.

User Plane Inactivity Timer

C

This IE shall be present if it needs to be changed.

Query URR Reference

O

This IE may be present if the Query URR IE is present or the QAURR flag is set to "1". When present, it shall contain a reference identifying the query request, which the UP function shall return in any usage report sent in response to the query.