5G MAC Hex Decoder

5G NR MAC multiplexes logical channels and control elements over the radio interface. Subheader decoding helps identify channel mapping and payload boundaries in captured PDUs.

Decode 5G MAC Data

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Raw Decode Output

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Decoded Fields

Payload Hex: N/A

Payload ASCII: N/A

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About 5G MAC

In NR, MAC PDUs are built from one or more MAC subheaders plus payload sections. The NR MAC subheader structure tells you what each payload element represents and how long it is.

5G NR MAC multiplexes logical channels and control elements over the radio interface. Subheader decoding helps identify channel mapping and payload boundaries in captured PDUs.

5G MAC Header Structure

NR MAC subheader core fields: R (reserved), F (length format), and LCID (logical/control channel ID).
Length field (L) presence: included for MAC SDUs and variable-size MAC control elements; omitted for fixed-size control elements.
F bit interpretation: F=0 uses an 8-bit length field, F=1 uses a 16-bit length field.
Parsing flow: read each subheader to determine payload type/size, then map subsequent bytes to each SDU/CE block.

Why Decode 5G MAC Packets

Decode 5G NR MAC subheader fields from hex including LCID, format flag, and optional length.