Extension of physical downlink control signaling in a communication system
First Claim
Patent Images
1. A method for a user equipment (UE) to receive a physical downlink control channel (PDCCH) and an enhanced physical downlink control channel (EPDCCH), the method comprising:
- receiving higher layer signaling;
determining the beginning OFDM symbol for the EPDCCH using a physical control format indicator channel (PCFICH), if the UE is not configured by the higher layer signaling;
determining the beginning OFDM symbol for the EPDCCH using information informed by the higher layer signaling, if the UE is configured by the higher layer signaling;
receiving the PDCCH using a first number of control channel elements (CCEs); and
receiving the EPDCCH, based on the determined beginning OFDM symbol for the EPDCCH, using a second number of enhanced CCEs (ECCEs),wherein a maximum value of the second number is larger than a maximum value of the first number,wherein a set of the first number for the CCEs is {1, 2, 4, 8}, anda set of the second number for the ECCEs is {1, 2, 4, 8, 16}.
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Abstract
Methods and apparatus are provided for a User Equipment (UE) to receive over a first set of resources a Physical Downlink Control CHannel (PDCCH) of a first type including Control Channel Elements (CCEs) of a first type, to receive over a second set of resources a PDCCH of a second type including CCEs of a second type, and to determine a resource for transmitting an acknowledgement signal in response to detecting the PDCCH of the first type or in response to detecting the PDCCH of the second type.
31 Citations
12 Claims
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1. A method for a user equipment (UE) to receive a physical downlink control channel (PDCCH) and an enhanced physical downlink control channel (EPDCCH), the method comprising:
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receiving higher layer signaling; determining the beginning OFDM symbol for the EPDCCH using a physical control format indicator channel (PCFICH), if the UE is not configured by the higher layer signaling; determining the beginning OFDM symbol for the EPDCCH using information informed by the higher layer signaling, if the UE is configured by the higher layer signaling; receiving the PDCCH using a first number of control channel elements (CCEs); and receiving the EPDCCH, based on the determined beginning OFDM symbol for the EPDCCH, using a second number of enhanced CCEs (ECCEs), wherein a maximum value of the second number is larger than a maximum value of the first number, wherein a set of the first number for the CCEs is {1, 2, 4, 8}, and a set of the second number for the ECCEs is {1, 2, 4, 8, 16}. - View Dependent Claims (2, 3)
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4. A user equipment (UE) apparatus for receiving a physical downlink control channel (PDCCH) and an enhanced physical downlink control channel (EPDCCH), the UE apparatus comprising:
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a selector configured to determine a beginning OFDM symbol for the EPDCCH using physical control format indicator channel (PCFICH), if the UE is not configured by the higher layer signaling, and to determine the beginning OFDM symbol for the EPDCCH using information informed by the higher layer signaling, if the UE is configured by the higher layer signaling; and a receiver configured to receive the PDCCH using a first number of control channel elements (CCEs), and to receive the EPDCCH based on the determined beginning OFDM symbol for the EPDCCH, using a second number of enhanced CCEs (ECCEs), wherein a maximum value of the second number is larger than a maximum value of the first number, wherein a set of the first number for the CCEs is {1, 2, 4, 8}, and a set of the second number for the ECCEs is {1, 2, 4, 8, 16}. - View Dependent Claims (5, 6)
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7. A method for transmitting a physical downlink control channel (PDCCH) and an enhanced physical downlink control channel (EPDCCH), the method comprising:
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transmitting higher layer signaling to a user equipment (UE); determining a beginning OFDM symbol for the EPDCCH using a physical control format indicator channel (PCFICH), if the UE is not configured by the higher layer signaling; and determining the beginning OFDM symbol for the EPDCCH using information of the higher layer signaling, if the UE is configured by the higher layer signaling, transmitting the PDCCH using a first number of control channel elements (CCEs); and transmitting the EPDCCH, based on the determined beginning OFDM symbol for the EPDCCH, using a second number of enhanced CCEs (ECCEs), wherein a maximum value of the second number is larger than a maximum value of the first number, wherein a set of the first number for the CCEs is {1, 2, 4, 8}, and a set of the second number for the ECCEs is {1, 2, 4, 8, 16}. - View Dependent Claims (8, 9)
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10. An apparatus for transmitting a physical downlink control channel (PDCCH) and an enhanced physical downlink control channel (EPDCCH), the apparatus comprising:
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a transmitter configured to transmit higher layer signaling to a user equipment (UE), to determine a beginning OFDM symbol for the EPDCCH using a physical control format indicator channel (PCFICH), if the UE is not configured by the higher layer signaling, to determine the beginning OFDM symbol for the EPDCCH using information of the higher layer signaling, if the UE is configured by the higher layer signaling, to transmit the PDCCH using a first number of control channel elements (CCEs), and to transmit the EPDCCH, based on the determined beginning OFDM symbol for the EPDCCH, using a second number of enhanced CCEs (ECCEs), wherein a maximum value of the second number is larger than a maximum value of the first number, wherein a set of the first number for the CCEs is {1, 2, 4, 8}, and a set of the second number for the ECCEs is {1, 2, 4, 8, 16}. - View Dependent Claims (11, 12)
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Specification