PDU Session Information Frame IEs

The following table describes the Information Elements present in the PDU Session Information frame.

Information ElementDescription
PDU Type

The PDU Type indicates the structure of the PDU session UP frame. The field takes the value of the PDU Type it identifies: "0" for PDU Type 0. The PDU type is in bit 4 to bit 7 in the first octet of the frame.

Value range: {0= DL PDU SESSION INFORMATION, 1=UL PDU SESSION INFORMATION, 2-15=reserved for future PDU type extensions}

Field length: 4 bits

Spare

The spare field is set to "0" by the sender and should not be interpreted by the receiver. This field is reserved for later versions.

Value Range: (0–2n-1)

Field Length: n bits

QoS Flow Identifier

When this IE is present, this parameter indicates the QoS Flow Identifier of the QoS flow to which the transferred packet belongs.

Value range: {0 to 2^6-1}

Field length: 6 bits

Padding

The padding is included at the end of the frame to ensure that the PDU Session user plane protocol PDU length (including padding and the future extension) is (n*4– 2) octets, where n is a positive integer.

Field Length: 0–3 octets.