Patent ID: 8625570

Claim:
A method of avoiding collision of inter-basic service set unicast, broadcast or multicast transmissions, the method comprising: reserving a first unicast, broadcast or multicast transmit opportunity in a first basic service set; reserving a second unicast, broadcast or multicast transmit opportunity in a second basic service set that overlaps the first basic service set; exchanging information related to the respective reserved transmit opportunity between the first and the second basic service sets; determining a difference of timing synchronization function (TSF) values between the first and the second basic service sets; determining if an overlap between the reserved transmit opportunities of the first and the second basic service sets exists based on the difference between the TSF values; and contending for medium access right using the Enhanced Distributed Channel Access (EDCA) protocol during the respective reserved transmit opportunity in at least one of the first and the second basic service sets.