Patent ID: 7392451

Claim:
A packet data retransmission control method to be adapted to a network accommodating a base-station upper-level control system, a plurality of base stations subordinate to said base-station upper-level control system, and a terminal station, comprising: a step at which said base-station upper-level control system transmits downstream packet data, which is terminated at said terminal station, to said plurality of base stations; a step at which a specific base station that is one of said base stations transfers the downstream packet data to said terminal station; a step at which said plurality of base stations receives an upstream control signal that is returned from said terminal station in order to acknowledge reception of the downstream packet data; a step at which base stations other than said specific base station notify said specific base station via said base-station upper-level control system that they have received the upstream control signal; and a step at which said specific base station determines packet data to be retransmitted according to the receiving situation thereof for the upstream control signal returned from said terminal station and the receiving situations of said other base stations for the upstream control signal.