Patent ID: 8363595

Claim:
A method of wireless communications, comprising: determining a first set of mobile stations (MSs) that may be in an unavailable state in a sleep mode or a scanning mode; determining a set of frames in which to send a new channel descriptor (CD) message, comprising at least one of a downlink channel descriptor (DCD) message and an uplink channel descriptor (UCD) message, such that the new CD message is received by each MS in the first set of MSs prior to the CD message taking effect, wherein determining a set of frames in which to send a new CD message comprises: determining a number corresponding to each frame of a set of frames representing a number of MSs of the first set of MSs which may receive the new CD message if it were sent during the corresponding frame; determining a frame of the set of frames in which to send the new CD message based at least on the number corresponding to each frame, wherein determining a frame of the set of frames in which to send the new CD message comprises selecting the frame with the largest number corresponding to each frame of the set of frames; adding the previously determined frame to a subset of frames during which to send the new CD message; and sending the new CD message during each frame of the subset of frames; and transmitting the new CD message during each frame in the set of frames.