Method and apparatus for component carrier aggregation in wireless communications
First Claim
Patent Images
1. A method of component carrier aggregation implemented by a wireless transmit/receive unit, the method comprising:
- receiving a message activating a second component carrier via a first component carrier;
attempting to decode a first physical downlink control channel (PDCCH) transmission on the first component carrier, the first PDCCH transmission including first control information comprising scheduling information for a physical downlink shared channel (PDSCH) associated with the first component carrier;
attempting to decode a second PDCCH transmission on the first component carrier, the second PDCCH transmission including second control information comprising scheduling information for a PDSCH associated with the second component carrier, wherein the WTRU determines a location to attempt to decode the second PDCCH transmission based on a control channel element (CCE) offset value; and
receiving data over the first component carrier and the second component carrier.
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Abstract
A wireless transmit/receive unit (WTRU) receives a downlink subframe having multiple component carriers, each component carrier having control information encoded in a physical downlink control channel (PDCCH). The WTRU performs a blind decoding of control information in a first PDCCH located within a first component carrier to obtain a location of a second PDCCH located within a second component carrier, where the location of the second PDCCH is relative to a location of the first PDCCH as control channel element offset. The WTRU decodes the second PDCCH at the obtained location.
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Citations
24 Claims
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1. A method of component carrier aggregation implemented by a wireless transmit/receive unit, the method comprising:
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receiving a message activating a second component carrier via a first component carrier; attempting to decode a first physical downlink control channel (PDCCH) transmission on the first component carrier, the first PDCCH transmission including first control information comprising scheduling information for a physical downlink shared channel (PDSCH) associated with the first component carrier; attempting to decode a second PDCCH transmission on the first component carrier, the second PDCCH transmission including second control information comprising scheduling information for a PDSCH associated with the second component carrier, wherein the WTRU determines a location to attempt to decode the second PDCCH transmission based on a control channel element (CCE) offset value; and receiving data over the first component carrier and the second component carrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of component carrier aggregation implemented by a wireless transmit/receive unit (WTRU), comprising:
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receiving a downlink subframe having a plurality of component carriers, each component carrier having control information encoded in a physical downlink control channel (PDCCH); receiving a search space restriction for detection of a PDCCH, wherein the search space pertains to at least one of a common search space or a WTRU-specific search space, and the search space restriction is based on a control channel element (CCE) aggregation level restriction and a specific CCE candidate restriction; and performing a decoding of control information of a first PDCCH in a first component carrier within the restricted search space. - View Dependent Claims (11, 12, 13)
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14. A wireless transmit/receive unit comprising:
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a receiver configured to receive a message activating a second component carrier via a first component carrier; a processor configured to attempt to decode a first physical downlink control channel (PDCCH) transmission on the first component carrier, the first PDCCH transmission including control information comprising scheduling information for a physical downlink shared channel (PDSCH) associated with the first component carrier, and attempt to decode a second PDCCH transmission on the first component carrier, the second PDCCH transmission including second control information comprising scheduling information for a PDSCH associated with the second component carrier, wherein the processor is configured to determine a location to attempt to decode the second PDCCH transmission based on a control channel element (CCE) offset value; and the receiver further configured to receive data over the first component carrier and the second component carrier. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification