METHODS AND APPARATUS TO ALLOCATE ACKNOWLEDGEMENT CHANNELS

摘要

Methods and apparatus for allocating acknowledgement channels. A linking scheme is established between indices of a plurality of physical hybrid automatic repeat-request indicator channels (PHICHs), and a combination of indices of control channel elements (CCEs) or indices of physical resource blocks and indices of demodulation reference signals. A base station (BS) transmits a scheduling grant to user equipment (UE) by using a plurality of CCEs. The BS determines an index of a PHICH within the plurality of PHICHs in dependence upon one index of the CCEs used to transmit the scheduling grant or at least one index of the PRBs used to transmit the data packet, and an index of the transmitted DMRS in accordance with the linking scheme. Finally, the BS transmits an acknowledgement signal to the UE by using the PHICH indicated by the determined index.