 small FC and SN parameters are similar to the previous Extended Header PDUs with AGMH header, if the MAC SDUs (PEH) MAC SDUs, or MAC SDU The 11-bit length field indicates the length of MAC fragments, or both are packed in the SDU or MAC SDU fragment in the payload. If a MAC payload in the MAC PDU. PDU payload consists of N MAC SDU/MAC SDU fragments, N - 1 length-fields are present to identify the length of MAC SDU/MAC SDU fragments 1 to N - 1. MAC Control The MCEH is used on control Transmission and Encryption Control (EC) indicates whether the Extended Header connections. When message fragmentation of payload is encrypted (1 bit) (MCEH) fragments associated with two control messages Control Connection Channel ID (CCC ID) Channel ID different control messages are sent, to identify separate fragmentation/reassembly state the transmitter assigns different machines (1 bit) Control Connection Channel IDs Polling bit indicates whether acknowledgement is (CCC IDs) to the MCEH of each required. MAC PDU. Fragmentation control bits (see Table 6-2) Sequence Number (6 bits) indicates the payload sequence number and is maintained per CCC ID. The SN value increments by one (modulo 64) sequentially. Multiplexing The MEH is used when data from Multiplexing of Number of Flow Information (N_Fl) (4-bits) present in Extended Header multiple connections associated different the MEH, If in connections are multiplexed, n-1 FIDs (MEH) with the same security association is connections on the and lengths are present. (i.e., N_FI is set to in - 1). present in the payload contained in same MAC PDU Flow Identifier (4 bits) The ith FID indicates the flow the MAC PDU. The AGMH header identifier of the (i + 1)th connection. carries the FID corresponding to the Length Indicator (LI) indicates whether size of the payload of the first connection. The payload is 11 bits or 14 bits MEH carries the FIDs corresponding Length of the connection payload (The ith length to remaining connections. field indicates the length of the payload of the (i + 1) t