According to one embodiment of the invention, a method for assistance in roaming and call capacity comprises the transmission of a first message to obtain information regarding access point capacity prior to transmitting a data flow. The first message identifies the priority level of the data flow and a requested medium time for the data flow. Thereafter, an access point transmits a second message that identifies whether the requested medium time is available for the data flow. This may involve setting of a “zero” value in the medium time allowed if there are no resources available or a reduced medium time if limited resources are offered to the requesting wireless device.