Abstract
PROBLEM TO BE SOLVED: To provide a method and apparatus of providing a piggybacked positive acknowledgement/negative acknowledgement (ACK/NACK) (PAN) field indicator (PANI) and a polling indicator.
SOLUTION: A combined field of a PANI bit a relative reserved block period (RRBP) bit and an EGPRS supplementary polling (ES/P) field indicates a polling scheme and a presence of a PAN field. The presence of the PAN field in the data block is indicated by using a specific training sequence. Forward error correction (FEC) coding is performed on the data block including a header and the presence of the PAN field is indicated by scrambling the encoded bits corresponding to the header with a specific scrambling sequence. A header check sequence (HCS) is generated and the presence of the PAN field is indicated by mixing a predetermined sequence with the HCS.
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