Patent ID: 7668128
Filing Date: 2010-02-23
Classification: H04W,Y02D

Abstract:
1. A method for limiting the length of a service period in a Wireless Local Area Network (WLAN) including an Access Point (AP) and at least one station, the method comprising: utilizing unscheduled Automatic Power Save Delivery (APSD) for delivering packets in said WLAN; determining a maximum service period (SP) length for at least one station of said at least one station: setting a value in a max SP length field by said station to said AP; limiting the number of frames transmitted from said AP to said station during a service period not to exceed the maximum service period length, wherein said limiting comprises determining a maximum number of frames to be transmitted by said AP to said station in response to said AP receiving said uplink frame from said station; determining, at said AP, said value of said max SP length field; triggering frame transmittal from said AP to said station during a service period when said value is non-zero; wherein said triggering frame transmittal comprises starting a new service period, and wherein said triggering frame transmittal further comprises eradicating certain signaling requirements for unscheduled APSD, wherein when said triggering frame transmittal from said AP to said station during a service period when said value is non-zero comprises sending one frame per PS poll; and preventing downlink frame delivery from said AP to said station when said value is zero.