ALLOCATING A CONTROL CHANNEL FOR CARRIER AGGREGATION
First Claim
1. A method for allocating a control channel to reduce a number of control channel candidates in a search space for carrier aggregation in a mobile communication system, comprising:
- selecting a control channel element (CCE) aggregation level for a control information allocation for a user equipment (UE) at an evolved NodeB (eNB);
identifying a value selected from at least one of a transmission mode of each of a plurality of component carriers (CCs), a carrier index (CI) in a downlink control information (DCI) format for of each of the plurality of CCs, and a DCI size of each of the plurality of CC'"'"'s control information determined by the transmission mode, wherein each CC is associated with the PDCCH; and
assigning, at the eNB, each CC'"'"'s control information into CCEs in a search space in the control channel starting at a CCE location based on a value identified for a CC and the CCE aggregation level for the UE receiving the CC.
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Accused Products
Abstract
Methods for allocating a physical downlink control channel (PDCCH) to reduce a number of PDCCH candidates in a search space for carrier aggregation on a user equipment (UE) are disclosed. The method comprises the step of selecting a control channel element (CCE) aggregation level for a PDCCH allocation for each of a plurality of user equipments (UEs) at an evolved NodeB (eNB). The operation of identifying a transmission mode for each of a plurality of component carriers (CCs) associated with the PDCCH at the eNB follows. The next operation of the method is assigning each CC'"'"'s downlink control information (DCI) into CCEs in a PDCCH search space in the PDCCH starting at a CCE location based on the CC'"'"'s transmission mode and the CCE aggregation level for the UE receiving the CC.
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Citations
20 Claims
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1. A method for allocating a control channel to reduce a number of control channel candidates in a search space for carrier aggregation in a mobile communication system, comprising:
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selecting a control channel element (CCE) aggregation level for a control information allocation for a user equipment (UE) at an evolved NodeB (eNB); identifying a value selected from at least one of a transmission mode of each of a plurality of component carriers (CCs), a carrier index (CI) in a downlink control information (DCI) format for of each of the plurality of CCs, and a DCI size of each of the plurality of CC'"'"'s control information determined by the transmission mode, wherein each CC is associated with the PDCCH; and assigning, at the eNB, each CC'"'"'s control information into CCEs in a search space in the control channel starting at a CCE location based on a value identified for a CC and the CCE aggregation level for the UE receiving the CC. - View Dependent Claims (2, 3)
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4. A method for allocating a physical downlink control channel (PDCCH) to reduce a number of PDCCH candidates in a search space for carrier aggregation on a user equipment (UE), comprising:
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selecting a control channel element (CCE) aggregation level for a PDCCH allocation for each of a plurality of user equipments (UEs) at an evolved NodeB (eNB); identifying a transmission mode for each of a plurality of component carriers (CCs) associated with the PDCCH at the eNB; and assigning each CC'"'"'s downlink control information (DCI) into CCEs in a PDCCH search space in the PDCCH at a CCE starting location that is selected based on the CC'"'"'s transmission mode and the CCE aggregation level for the UE receiving the CC. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A computer program product, comprising a computer usable medium having a computer readable program code embodied therein, the computer readable program code adapted to be executed to implement a method for allocating a physical downlink control channel (PDCCH) to reduce a number of PDCCH candidates in a search space for carrier aggregation on an evolved NodeB (eNB) comprising:
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selecting a control channel element (CCE) aggregation level for a PDCCH allocation for a user equipment (UE); identifying a transmission mode for each of a plurality of component carriers (CCs) associated with the PDCCH; and assigning each CC'"'"'s downlink control information (DCI) into CCEs in the PDCCH at a CCE starting location based on each CC'"'"'s transmission mode and the CCE aggregation level for the UE receiving the CC.
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20. A computer program product, comprising a computer usable medium having a computer readable program code embodied therein, the computer readable program code adapted to be executed to implement a method for searching a reduced number of physical downlink control channel (PDCCH) candidates in a search space for carrier aggregation on a user equipment (UE) comprising:
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receiving a PDCCH at the UE; searching for a selected component carrier'"'"'s (CC'"'"'s) downlink control information (DCI) in a PDCCH search space by identifying a starting control channel element (CCE) location based on the selected CC'"'"'s transmission mode and a CCE aggregation level for the UE receiving the selected CC; decoding each PDCCH candidate in the PDCCH search space beginning at a CCE starting location until a validly decoded PDCCH candidate is decoded; and obtaining the selected CC'"'"'s DCI from the validly decoded PDCCH candidate.
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Specification