Patent ID: 7424661

Claim:
A packet transmitting apparatus in a wireless LAN comprising a wireless LAN base station; and a plurality of wireless terminals connected to said wireless LAN base station through the wireless LAN, wherein said wireless LAN base station includes: frame burst transmission means without an ACK for continuously transmitting a plurality of data packets destined to said plurality of wireless terminals at minimum frame intervals without ACK; retransmission processing means for performing a processing for transmitting a data packet to be retransmitted based on retransmission request information included in data packets transmitted from said plurality of wireless terminals; notification packet generation means for generating notification packets for notifying said plurality of wireless terminals of frame burst structure information on frame burst packets that are all the data packets continuously transmitted at the minimum frame intervals without the ACK packet between beacons; and frame transmission means using ACK for transmitting the data packets to be retransmitted with the notification packets according to retransmission control procedures using a predetermined frame interval and an ACK packet, and said each wireless terminal includes: retransmission request processing means for generating retransmission request information if an unreceived packet is detected among frame burst packets destined to the wireless terminal and notified by frame burst structure information included in said notification packet transmitted to the wireless terminal; retransmission header adding means for transmitting the retransmission request information generated by the retransmission request processing means with a retransmission header accompanied with the data packets destined to the wireless LAN base station; and retransmitted packet receiving means for receiving said retransmitted data packet.