Patent ID: 8472392

Claim:
An Access Point (AP), the AP providing access to a wireless communication network, the wireless communication network comprising: a plurality of stations corresponding to a plurality of virtual Basic Service Sets (vBSSs), wherein: each of the vBSSs is operated on a superframe basis, the superframe being scheduled by a beacon frame transmitted from the AP; the superframe includes the beacon frame, one Contention-Free Period (CFP), and one Contention Period (CP) and the superframe further includes a guard time after the CP; and the CPs of the vBSSs include intervals which do not overlap each other; and when the vBSSs are classified into stations which use different Wireless Local Area Network (WLAN) standards, the superframe is scheduled such that a CP of a vBSS based on a WLAN standard of recent technology is located at a latter place; and the guard time is inserted only after a CP of a superframe located at a last place.