Allocating a control channel for carrier aggregation
AssigneeIntel Corporation
InventorPing Wang
Life of this patent
Estimating the term…
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.
Claims20
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.
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:
- 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.
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:
- 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.
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:
- 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.
Dependencies are inferred from the claim text.