Patent ID: 7706397

Claim:
A method comprising: allocating, based on a channel access scheme of an initiator, a time slot for exchanging between the initiator and a responder one or more transmissions; enabling the responder to transmit to the initiator in a reverse direction by transferring to the responder originator rights of the initiator, wherein transferring the originator rights to the responder includes transmitting from the initiator to the responder a first aggregation of data units including a reverse direction flag bit set to a predefined reverse-direction-enable value; receiving from the responder in the reverse direction a block-acknowledgment including the flag bit set to a predefined reverse-direction-continue value and at least one second aggregation of data units at least an interframe-space period after the block acknowledgement; and enabling the initiator to transmit at least a third aggregation of data units by transferring back the originator rights from the responder to the initiator within the time slot, wherein the transferring back includes transmitting the third aggregation of data units including the reverse direction flag bit reset to a predefined reverse-direction-disable value.