Search space reconfiguration for enhanced-pdcch

A method for providing, by a receiving apparatus (UE) configured with at least one serving cell including a primary cell, simultaneous feedback on reconfiguration attempts of search spaces for enhanced physical downlink control channels (E-PDCCH) and feedback on at least one downlink transmission to a transmitting apparatus (eNB), the method comprising the following steps performed by said receiving apparatus (UE):

• receiving said at least one downlink transmission via at least one serving cell from the transmitting apparatus,
• receiving from the transmitting apparatus reconfiguration information for reconfiguration of the search spaces for at least one serving cell,
• determining for said at least one downlink transmission whether the respective downlink transmission could be decoded successfully, and determining whether the received reconfiguration information could be decoded successfully,
• generating a feedback tuple including ACK/NACK/DTXs determined based on the successful/un-successful decoding of the at least one downlink transmission and including ACK/DTXs determined based on the successful/un-successful decoding of the reconfiguration information,
• transmitting the feedback tuple as a combination of:
• a selected one of a plurality of uplink resources available for transmitting the feedback tuple via the primary cell, and
• a selected one of a plurality of modulation symbols of a modulation scheme to be transmitted on the selected uplink resource.

A receiving apparatus (UE) for providing to a transmitting apparatus (eNB) simultaneous feedback on a reconfiguration attempt of a search space for an enhanced physical downlink control channel (e-PDCCH) and feedback on at least one downlink transmission, the receiving apparatus (UE) being configured with at least one serving cell including a primary cell and comprising:

• a receiver adapted to receive said at least one downlink transmission via at least one serving cell from the transmitting apparatus, and adapted to receive from the transmitting apparatus reconfiguration information for reconfiguration of the search spaces for at least one serving cell,
• a processor adapted to determine for said at least one downlink transmission whether the respective downlink transmission could be decoded successfully, and adapted to determine whether the received reconfiguration information could be decoded successfully, wherein
• the processor is adapted to generate a feedback tuple including ACK/NACK/DTXs determined based on the successful/un-successful decoding of the at least one downlink transmission and including ACK/DTXs determined based on the successful/un-successful decoding of the reconfiguration information, and
• a transmitter adapted to transmit the feedback tuple as a combination of:
• a selected one of a plurality of uplink resources available for transmitting the feedback tuple via the primary cell, and
• a selected one of a plurality of modulation symbols of a modulation scheme to be transmitted on the selected uplink resource.

A computer readable medium storing instructions that, when executed by a processor of a receiving apparatus, cause the receiving apparatus (UE) configured with at least one serving cell to provide simultaneous feedback on a reconfiguration attempt of a search space for an enhanced physical downlink control channel (e-PDCCH) and feedback on at least one downlink transmission, to a transmitting apparatus (eNB) by:

• receiving said at least one downlink transmission via at least one serving cell from the transmitting apparatus, and receiving from the transmitting apparatus reconfiguration information for reconfiguration of the search spaces for at least one serving cell,
• determining for said at least one downlink transmission whether the respective downlink transmission could be decoded successfully, and determining whether the received reconfiguration information could be decoded successfully, wherein
• generating a feedback tuple including ACK/NACK/DTXs determined based on the successful/un-successful decoding of the at least one downlink transmission and including ACK/DTXs determined based on the successful/un-successful decoding of the reconfiguration information, and
• transmitting the feedback tuple as a combination of:
• a selected one of a plurality of uplink resources available for transmitting the feedback tuple via the primary cell, and
• a selected one of a plurality of modulation symbols of a modulation scheme to be transmitted on the selected uplink resource.