Patent ID: 8098636
Filing Date: 2012-01-17
Classification: H04L

Abstract:
1. A radio transmission apparatus for transmitting information in a wireless network, said wireless network being formed with a plurality of communication apparatuses serving as communication stations, said radio transmission apparatus comprising: packetizing means for dividing asynchronous information into information packets as predetermined information units on said wireless network; transmitting means for transmitting said information packets under predetermined access control; frame cycle setting means for setting a predetermined transmission frame cycle; transmission pointer recording means for recording a sequence number of a last packet transmitted in said predetermined transmission frame cycle as a transmission pointer value of said predetermined transmission frame cycle; receiving means for receiving an acknowledgment information packet from a radio transmission apparatus serving as an information receiver, wherein said acknowledgement information packet includes a plurality of pieces of acknowledgement information combined during more than one transmission frame cycle; timing means for timing said predetermined transmission frame cycle; retransmission frame cycle setting means for presetting a frame cycle for retransmission; control means for determining whether any packets are candidates for retransmission based on the transmission pointer value when said frame cycle for retransmission arrives, and if any packets are candidates for retransmission, the control means further identifying an information packet whose acknowledgment information has not been received when the frame cycle for retransmission arrives; and retransmitting means for automatically retransmitting only the information packet whose acknowledgment information has not been received by the time said frame cycle arrives for retransmission.