School of Specs 23.501v20.2.0

3GPP 23.501 v20.2.0 — the document's own text

5.7.6.2 IP Packet Filter Set

Taught in 14. What the network promises (The 5G system architecture, in depth), 5. The connection, and what is promised on it (The 5G system architecture, overview).

For IP PDU Session Type, the Packet Filter Set shall support Packet Filters based on at least any combination of:

  • Source/destination IP address or IPv6 prefix.
  • Source / destination port number.
  • Protocol ID of the protocol above IP/Next header type.
  • Type of Service (TOS) (IPv4) / Traffic class (IPv6) and Mask.
  • Flow Label (IPv6).
  • Security parameter index.
  • Packet Filter direction.

NOTE 1: A value left unspecified in a Packet Filter matches any value of the corresponding information in a packet.

NOTE 2: An IP address or Prefix can be combined with a prefix mask.

NOTE 3: Port numbers can be specified as port ranges.

NOTE 4: Type of Service (IPv4)/Traffic class (IPv6) can be used to define packet filters for DSCP and ECN as described in RFC 3168 [193].

  • (S)RTP Multiplexed Media Identification Information including a combination of at least one of the following:
    • Synchronization Source (SSRC), as defined by IETF RFC 3550 [185];
    • Payload Type (PT), as defined by IETF RFC 3550 [185];
    • Media Identification (MID)-tag and RTP SDES header extension id for MID, as defined by IETF RFC 9143 [207];
    • RTCP packet type.