HARQ-ACK feedback detection for an I/Q-multiplexed control channel

摘要

In a network that provides high-speed packet access, a mobile terminal is served by multiple activated serving cells which are grouped into cell groups. The mobile terminal monitors control channel transmissions to detect whether there are any transmissions for the mobile terminal from the activated serving cells for each cell group and provides feedback to a primary serving cell. When no transmission is detected from serving cells of a particular cell group, the mobile terminal may transmit feedback information explicitly indicating that no transmission is detected for that cell group. Alternatively, the mobile terminal may withhold transmitting feedback for that cell group and increases the power for transmitting the feedback information for cell groups in which transmissions were detected.

主权项

1. A method performed at mobile terminal of a wireless network, the method comprising:
monitoring channel transmissions of a subframe from each of a plurality of activated serving cells serving the mobile terminal, the activated serving cells being grouped into first and second cell groups in which the first cell group includes a primary serving cell and one or more secondary serving cells and the second cell group includes one or more secondary serving cells different from the secondary serving cells of the first cell group; determining, for each activated serving cell based on the monitoring, whether information for the mobile terminal is detected in the subframe of the channel transmission from that activated serving cell; determining, for each of the first and second cell groups, whether that cell group is a discontinuous transmission (DTX) cell group or a non-DTX cell group, a DTX cell group being a cell group in which no information is detected in the subframe of the channel transmission from any activated serving cell in that cell group and a non-DTX cell group being a cell group in which information is detected in the subframe of the channel transmission from at least one activated serving cell in that cell group; transmitting, when one of the first and second cell groups is the DTX cell group and the other is the non-DTX cell group, first and second feedback information, respectively, on first and second feedback channels associated with the first and second cell groups to the primary serving cell, and wherein a DTX codeword is provided as the feedback information associated with the DTX cell group, the DTX codeword being a pattern of a predetermined number of bits indicating that no information for the mobile terminal was detected from any of the activated serving cells in the cell group.