Patent ID: 7433314

Claim:
A method of acknowledging the receipt of a transmitted data stream in a wireless personal area network (WPAN), the method comprising: transmitting a plurality of medium access control (MAC) service data units (MSDUs) to a receiving entity, wherein at least one of the MSDUs is fragmented into a plurality of fragmented packets (MPDUs) and wherein at least one of the MSDUs is non-fragmented; and receiving a delayed acknowledgement frame from the receiving entity, wherein the delayed acknowledgement frame comprises i) a bitmap field configured to acknowledge only the at least one fragmented MSDU and ii) a section configured to acknowledge the at least one non-fragmented MSDU without the use of a bitmap field, and wherein the size of each of the bitmap fields for each of the at least one fragmented MSDU varies according to the number of MPDUs each of the at least one fragmented MSDU is fragmented into.