Wireless apparatus for a multi-carrier system
A wireless apparatus for a multi-carrier system is disclosed. The wireless apparatus comprises; a control channel unit which monitors a control channel transmitted via at least one carrier from among a plurality of carriers; and a data channel unit which transmits or receives data packets to or from a data channel using the resource allocation received from the control channel. The control channel unit monitors the control channel in a plurality of search space in a subframe.
1. A wireless apparatus for a multiple carrier system, comprising:
a memory; and
a processor co-operatively connected to the memory and configured to
monitor a first control channel and a second control channel transmitted over at least one of a plurality of carriers;
detect the first control channel in at least one of a common search space of a first carrier and a User Equipment (UE)-specific search space of the first carrier;
detect the second control channel in a UE-specific search space of a second carrier; and
transmit or receive a data packet on a data channel using a resource allocation received on at least one of the first control channel or the second control channel.
2. The wireless apparatus of claim 1 , wherein a starting position of the UE-specific search space of the second carrier is defined based on an index of the second carrier.
3. The wireless apparatus of claim 1 , wherein a starting position of the UE-specific search space of the second carrier is separated by an offset from a position of the common search space or a position of the UE-specific search space of the first carrier.
4. The wireless apparatus of claim 1 , wherein the resource allocation includes an index of a carrier through which the data channel is transmitted.
5. The wireless apparatus of claim 1 , wherein a first resource allocation of the first control channel and a second resource allocation of the second control channel relate to different carriers.
6. A method of monitoring a control channel in a multiple carrier system, comprising:
monitoring, by a wireless apparatus, a first control channel and a second control channel transmitted over at least one of a plurality of carriers;
detecting, by the wireless apparatus, the first control channel in at least one of a common search space of a first carrier and a User Equipment (UE)-specific search space of the first carrier;
detecting, by the wireless apparatus, the second control channel in a UE-specific search space of a second carrier and
transmitting or receiving, by the wireless apparatus, a data packet on a data channel using a resource allocation received on at least one of the first control channel or the second control channel.
7. The method of claim 6 , wherein the monitoring of the first and the second control channels is performed by checking a Cyclic Redundancy Check (CRC) error by de-masking a user equipment's identifier.