Abstract: An ARQ feedback message provides feedback information on a series of sequential data blocks received by a receiver (26). The ARQ feedback message comprises an information element (900). The information element (900) indicates for each sequence of a plurality of sequences of the series of sequential data blocks whether each sequence of data blocks has been received. The information element comprises at least one bit for indicating that the information element provides feedback information only for sequences of data blocks beginning with a first data block of a first sequence of the plurality of sequences. The information element is a Block Sequence type information element without cumulative acknowledgement.

Abstract: A wireless transceiver apparatus (201, 203) and a method of operation in an Automatic Repeat Request (ARQ) mode is disclosed. On the transmitter side a packet of data (113) is fragmented into a series of sequential data blocks and each data block is assigned a block sequence number (601). At least a first data block of the series of sequential data blocks is sent to the receiver (603), and also a first block sequence number corresponding to the first data block. An acknowledgment timer is set (605) specifying a time interval in which to receive an acknowledgment message from the remote transceiver. If the acknowledgment timer has timed out, the transmitter side sends a discard message (607) to the receiver specifying at least a second block sequence number corresponding to at least a second data block, and specifying that said second data block is to be discarded.

Abstract: A method and apparatus for processes a downlink frame within a Medium Access Control (MAC) layer (348) where the downlink frame includes a plurality of fragments constituting one or more MAC Service Data Unit (MSDU)s. The MAC layer pre-processes the plurality of fragments of the downlink frame by reordering the fragments to reassemble one or more of the MSDUs (910) until an end-of-frame signal is detected (912). The end-of-frame signal indicates that all of the plurality of fragments for a downlink frame have been received. The MAC layer post-processes the plurality of fragments (916) in response to detecting the end-of-frame signal (912), then delivers the reassembled MSDUs to a next layer (918).