a transceiver; and

control circuitry configured to:

communicate with a wireless terminal via an established communication channel,

receive from the wireless terminal a transition judgement information request frame that includes a transition judgement information request indicating that a quality of a signal received by the wireless terminal from the wireless device is above a first predetermined threshold related to a request for an immediate transfer of the wireless terminal to another wireless base station and is below a second predetermined threshold related to a quality of communication between the wireless terminal and the wireless device,

wherein the transition judgement information request frame includes base station transition criteria that includes a one or more criteria IDs arranged in descending priority order,

relay the transition judgement information request to a wireless network controller

receive a beacon element control notification frame including a beacon element control notification from the wireless network controller,

wherein the beacon element control notification frame includes a Required Beacon Element identifier (ID) which includes a policy field related to beacon timing or periodicity, and a mandatory element ID field that includes one or more pairs of criteria ID and required beacon element ID fields, each of the criteria ID of the mandatory element ID field corresponding to a respective criteria ID of transition judgement information request frame,

in response to the beacon element control notification, transmit a beacon frame to the wireless terminal,

wherein the beacon frame includes a MAC header and a frame body, the frame body including a timestamp field, a beacon interval field indicating a time interval in which the Beacon frame is transmitted, a base station capability information field, a base station identification field, a base station supported rates field, and a priority field indicating a type of service and a service priority.