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Table 5 WiMAX relay header fields

From: New combined WiMAX/DSRC infrastructure design for efficient vehicular networking

Name Length (bits) Description
RMI 1 Relay mode indication
1 = Use relay MAC header
0 = Use GMH
CID 16 CID
Tunnel CID or BCID of the RS
Priority 3 Priority of the tunnelled MPDU
HCS 8 Header check sequence
HT 1 Header type (use 0 for relay header)
1 = Bandwidth request header
0 = Relay header
LEN 11 Length
Length of the MAC PDU in bytes
Rsv   Reserved for future use. Set to 0
Type 6 Flags to indicate the type of payload attached