Method and apparatus for transmitting and receiving PDCCH using DCI having adjusted size
First Claim
1. A method for receiving a Physical Downlink Control Channel (PDCCH) in a wireless access system that supports multiple carriers, the method comprising:
- performing blind decoding in a search space allocated to a user equipment in order to search for the PDCCH; and
receiving a PDCCH including Downlink Control Information (DCI), whose size has been adjusted, in the search space,wherein the size of the DCI has been adjusted taking into consideration bandwidth allocated to the user equipment and a transmission mode of a Component Carrier (CC) allocated to the user equipment,wherein the size of the DCI is adjusted based on the transmission mode of the CC allocated to the user equipment, when the difference in payload sizes of the DCI according to the bandwidth is less than a threshold value, andwherein the size of the DCI is adjusted for each bandwidth group formed through bandwidth grouping, when the difference in payload sizes of the DCI according to the bandwidth is greater than the threshold value.
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Abstract
The present invention relates to a method for adjusting a size of an information bit used in a control channel and an apparatus for performing the same. In addition, the present invention relates to a method for searching for a control channel including an information bit having an adjusted size. A method for receiving a physical downlink control channel (PDCCH) in a wireless access system for supporting multi-carriers as one embodiment of the present invention comprises the steps of: performing blind decoding in a search space allocated in a terminal to search for a PDCCH; and receiving the PDCCH including downlink control information (DCI) having a size adjusted in the search space. At this time, the size of the DCI can be adjusted by considering a bandwidth allocated in the terminal, a transmission mode of a component carrier (CC) allocated in the terminal, and the number of antennas of the terminal.
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Citations
16 Claims
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1. A method for receiving a Physical Downlink Control Channel (PDCCH) in a wireless access system that supports multiple carriers, the method comprising:
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performing blind decoding in a search space allocated to a user equipment in order to search for the PDCCH; and receiving a PDCCH including Downlink Control Information (DCI), whose size has been adjusted, in the search space, wherein the size of the DCI has been adjusted taking into consideration bandwidth allocated to the user equipment and a transmission mode of a Component Carrier (CC) allocated to the user equipment, wherein the size of the DCI is adjusted based on the transmission mode of the CC allocated to the user equipment, when the difference in payload sizes of the DCI according to the bandwidth is less than a threshold value, and wherein the size of the DCI is adjusted for each bandwidth group formed through bandwidth grouping, when the difference in payload sizes of the DCI according to the bandwidth is greater than the threshold value. - View Dependent Claims (2, 3, 4, 9, 10, 11, 12)
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5. A user equipment for receiving a Physical Downlink Control Channel (PDCCH) in a wireless access system that supports multiple carriers, the user equipment comprising:
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a transmitter; a receiver; and a processor, wherein the user equipment controls the processor and the receiver to perform blind decoding in a search space allocated to the user equipment in order to search for the PDCCH and to receive a PDCCH including Downlink Control Information (DCI), whose size has been adjusted, in the search space, and wherein the size of the DCI has been adjusted taking into consideration bandwidth allocated to the user equipment and a transmission mode of a Component Carrier (CC) allocated to the user equipment, wherein the size of the DCI is adjusted based on the transmission mode of the CC allocated to the user equipment, when the difference in payload sizes of the DCI according to the bandwidth is less than a threshold value and, wherein the size of the DCI is adjusted for each bandwidth group formed through bandwidth grouping, when the difference in payload sizes of the DCI according to the bandwidth is more than the threshold value. - View Dependent Claims (6, 7, 8, 13, 14, 15, 16)
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Specification