Overhead reduction for transmission of acknowledgment signals

A user equipment (UE) configured to transmit an acknowledgment signal in a communication system, the UE comprising:

• a controller configured to
• detect at least one control channel on a physical resource block (PRB) set in at least one subframe from a set of M subframes where, for a control channel from the at least one control channel and for a subframe from the at least one subframe, the subframe has an index, the control channel includes downlink control information and comprises at least one control channel element (CCE), and the downlink control information includes an acknowledgement resource offset having two bits, and
• determine a resource for transmitting the acknowledgement signal based on a sum of
• a) a number of a first of the at least one CCE of the control channel,
• b) a value corresponding to the acknowledgement resource offset,
• c) a sum value of a number of CCEs in the PRB set over subframes from the set of M subframes with indexes smaller than or equal to the subframe index, and
• d) an offset for the resource;
• and
• a transmitter configured to transmit the acknowledgement signal on the resource.

A method of operating a base station (BS) to receive an acknowledgment signal in a communication system, the method comprising:

• transmitting at least one control channel on a physical resource block (PRB) set in at least one subframe from a set of M subframes where, for a control channel from the at least one control channel and for a subframe from the at least one subframe, the subframe has an index, the control channel includes downlink control information and comprises at least one control channel element (CCE), and the downlink control information includes an acknowledgement resource offset having two bits;
• and
• receiving the acknowledgement signal on a resource determined based on a sum of
• a) a number of a first of the at least one CCE of the control channel,
• b) a value corresponding to the acknowledgement resource offset,
• c) a sum value of a number of CCEs in the PRB set over subframes from the set of M subframes with indexes smaller than or equal to the subframe index, and
• d) an offset for the resource.

A base station (BS) configured to receive an acknowledgment signal in a communication system, the method comprising:

• a transmitter configured to transmit at least one control channel on a physical resource block (PRB) set in at least one subframe from a set of M subframes where, for a control channel from the at least one control channel and for a subframe from the at least one subframe, the subframe has an index, the control channel includes downlink control information and comprises at least one control channel element (CCE), and the downlink control information includes an acknowledgement resource offset having two bits;
• and
• a receiver configured to receive the acknowledgement signal on a resource determined based on a sum of
• a) a number of a first of the at least one CCE of the control channel,
• b) a value corresponding to the acknowledgement resource offset,
• c) a sum value of a number of CCEs in the PRB set over subframes from the set of M subframes with indexes smaller than or equal to the subframe index, and
• d) an offset for the resource.