Patent ID: 7337337

Claim:
A power-save polling list producing device comprising: a cumulative lead time frame transmitter producing a cumulative lead time frame including a cumulative lead time value and transmitting the cumulative lead time frame to a first station, wherein if there is at least one higher priority station having a higher polling priority than the first station, the cumulative lead time value represents a time required for data transmission by the at least one higher priority station; a self lead time frame receiver receiving a self lead time frame including a self lead time value from the first station, wherein the self lead time value represents a time required for data transmission by the first station; and a power-save polling list producer adding the self lead time value included in the self lead time frame received by the self lead time frame receiver to the cumulative lead time value to generate an added cumulative lead time value and to produce a power-save polling list, which includes the self lead time value and the added cumulative lead time value.