Patent ID: 8467799

Claim:
A base station comprising: a transmit path circuitry configured to: transmit a downlink (DL) grant in a single control channel element (CCE) to a subscriber station in a subframe n-k, the subscriber station performing an orthogonal transmit diversity scheme using N transmit antennas (N-Tx ORT) with N being a positive integer greater than 1, and transmit data streams to the subscriber station; and a receive path circuitry configured to receive an acknowledgement signal from the subscriber station in response to the data streams, the acknowledgement signal carried in at least two physical uplink control channel (PUCCH) resources in a subframe n, wherein a first resource of the at least two PUCCH resources is assigned by a first CCE index n CCE corresponding to the control channel element used to transmit the downlink grant in the subframe n-k and a second resource of the at least two PUCCH resources is assigned by a mapping function, and wherein the mapping function assigns the second resource by mapping the first CCE index n CCE to an additional PUCCH resource index in the subframe n.