Patent ID: 8634358

Claim:
A wireless communication apparatus, comprising: a controller configured to: reserve resources on a first downlink carrier to send feedback for a plurality of uplink carriers, the first downlink carrier being one of a plurality of downlink carriers, the plurality of uplink carriers including a first uplink carrier comprising N RB1 uplink resource blocks and a second uplink carrier comprising N RB2 uplink resource blocks, wherein reserved resources on the first downlink carrier corresponding to uplink resource blocks numbered 1 to N RB1 are assigned to carry feedback for the first uplink carrier, wherein reserved resources on the first downlink carrier corresponding to uplink resource blocks numbered N RB1 +1 to N RB1 +N RB2 are assigned to carry feedback for the second uplink carrier, wherein the reserved resources comprise resource elements corresponding to a physical channel that provides indication of successful or unsuccessful decoding of data transmissions received on uplink carriers, and wherein resources on a second downlink carrier corresponding to uplink resource blocks numbered 1 to N RB2 are assigned to carry feedback for the second uplink carrier; and reserve resource blocks numbered 1 to N RB1 on the first downlink carrier for single-carrier access terminals and multi-carrier access terminals; and a processor configured to: generate an uplink grant for at least one uplink carrier for transmission on the first downlink carrier; and generate feedback for transmission on the first downlink carrier, the feedback comprising indication of successful or unsuccessful decoding of data transmission received on the at least one uplink carrier.