Patent ID: 7653041

Claim:
A method for power-efficient transmission supporting integrated service over WLAN (wireless local area network), which comprises: using an on-demand polling (ODP) scheme, which combines polling-based and contention-based mechanism and dynamically adjusts a polling list, wherein voice services are transmitted by the polling-based mechanism and data services are transmitted by the contention-based mechanism, wherein a voice station is in the polling list when it is in the active mode; the voice station is temporarily removed from the polling list when it is silent and configured to operate in the sleep mode without uplink transmission for saving power during an idle mode; and the voice station adopts the contention-based mechanism to join the list again while returning from the idle mode, wherein in the ODP scheme, a superframe of WLAN is divided into controlled access phase (CAP) and contention phase (CP), in which the voice services are transmitted at CAP and the data services are transmitted at CP, wherein after the CAP, the remaining time of the superframe is allocated for the CP, and wherein the CAP within the superframe is divided into bi-direction voice transmission, uplink-only voice transmission (UL-only) and downlink-only voice transmission (DL-only), and an access point (AP) periodically sends polling grants in the CAP within the superframe for conducting.