Searching for control channels in a wireless network

摘要

A user equipment (UE) may receive an OFDM signal having control channel elements (CCEs). The CCEs may be arranged in levels where a first level aggregates less CCEs than a second level. A processor may search for a control channel from control channel candidates that is comprised of the CCEs. A limited number of CCEs may be searched on the first level.

主权项

1. A method of operating a user equipment, the method comprising:
receiving a wireless signal at the user equipment, the wireless signal comprising a control channel for the user equipment, the control channel being in at least one control channel element (CCE), the control channel comprising an indication of an uplink communication resource useable by the user equipment for uplink communication; searching for the control channel in the at least one CCE from a plurality of candidate CCEs, the plurality of candidate CCEs being in a plurality of aggregation levels, each of the plurality of aggregation levels comprising a respective limited number of candidate control channels, and the searching includes searching at least one of the respective limited number of candidate control channels in at least one of the plurality of aggregation levels; and transmitting an uplink data signal according to the uplink communication resource, the indication of the uplink communication resource decoded from the control channel of the wireless signal according to the plurality of candidate CCEs using an identifier associated with the user equipment.