Method and apparatus for providing advanced indication for ePDCCH
First Claim
1. A method for determining whether an enhanced physical downlink control channel (ePDCCH) transmission exists for a user equipment (UE) in a subframe, the method comprising the steps of:
- receiving, at the UE, a transmission on physical downlink control channel (PDCCH) resources of the subframe;
extracting downlink control information (DCI) from the PDCCH resources, the DCI comprising at least one bit indicating whether the ePDCCH transmission exists for the UE in the subframe;
determining, at the UE, whether the ePDCCH transmission exists using the at least one bit; and
buffering and decoding additional symbols of the subframe when the ePDCCH transmission exists,wherein the at least one bit comprises two bits indicating one of absence of the ePDCCH transmission for the UE, presence of the ePDCCH transmission carrying an uplink assignment or power control information for the UE, and presence of the ePDCCH transmission carrying a downlink assignment for the UE, andwherein, when the two bits indicate the presence of the ePDCCH transmission carrying the uplink assignment or power control information, buffering and decoding the additional symbols comprises;
buffering and decoding only resources corresponding to the ePDCCH transmission for the UE; and
ignoring remaining physical resource blocks (PRBs) of the subframe.
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Accused Products
Abstract
A method and an apparatus are provided for determining whether an enhanced physical downlink control channel (ePDCCH) transmission exists for a user equipment (UE) in a subframe. The UE receives a transmission on physical downlink control channel (PDCCH) resources of the subframe. Downlink control information (DCI) is extracted from the PDCCH resources. The DCI includes at least one bit indicating whether the ePDCCH transmission exists for the UE in the subframe. The UE determines whether the ePDCCH transmission exists using the at least one bit. Additional symbols of the subframe are buffered and decoded when the ePDCCH transmission exists.
19 Citations
16 Claims
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1. A method for determining whether an enhanced physical downlink control channel (ePDCCH) transmission exists for a user equipment (UE) in a subframe, the method comprising the steps of:
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receiving, at the UE, a transmission on physical downlink control channel (PDCCH) resources of the subframe; extracting downlink control information (DCI) from the PDCCH resources, the DCI comprising at least one bit indicating whether the ePDCCH transmission exists for the UE in the subframe; determining, at the UE, whether the ePDCCH transmission exists using the at least one bit; and buffering and decoding additional symbols of the subframe when the ePDCCH transmission exists, wherein the at least one bit comprises two bits indicating one of absence of the ePDCCH transmission for the UE, presence of the ePDCCH transmission carrying an uplink assignment or power control information for the UE, and presence of the ePDCCH transmission carrying a downlink assignment for the UE, and wherein, when the two bits indicate the presence of the ePDCCH transmission carrying the uplink assignment or power control information, buffering and decoding the additional symbols comprises; buffering and decoding only resources corresponding to the ePDCCH transmission for the UE; and ignoring remaining physical resource blocks (PRBs) of the subframe. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for determining whether an enhanced physical downlink control channel (ePDCCH) transmission exists for a user equipment (UE) in a subframe, the apparatus comprising:
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a memory; a receiver configured to receive a transmission on physical downlink control channel (PDCCH) resources of the subframe; and at least one processor coupled to the memory and the receiver and configured to; extract downlink control information (DCI) from the PDCCH resources, the DCI comprising at least one bit indicating whether the ePDCCH transmission exists for the UE in the subframe; determine whether the ePDCCH transmission exists using the at least one bit; and buffer and decode additional symbols of the subframe when the ePDCCH transmission exists, wherein the at least one bit comprises two bits indicating one of absence of the ePDCCH transmission for the UE, presence of the ePDCCH transmission carrying an uplink assignment or power control information for the UE, and presence of the ePDCCH transmission carrying a downlink assignment for the UE, and wherein, when the two bits indicate the presence of the ePDCCH transmission carrying the uplink assignment or power control information, the at least one processor is further configured to; buffer and decode only resources corresponding to the ePDCCH transmission for the UE; and ignore remaining physical resource blocks (PRBs) of the subframe. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A device for determining whether an enhanced physical downlink control channel (ePDCCH) transmission exists for a user equipment (UE) in a subframe, the device comprising:
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a memory; and at least one processor coupled to the memory and configured to; extract downlink control information (DCI) from the PDCCH resources, the DCI comprising at least one bit indicating whether the ePDCCH transmission exists for the UE in the subframe; determine whether the ePDCCH transmission exists using the at least one bit; and buffer and decode additional symbols of the subframe when the ePDCCH transmission exists, wherein the at least one bit comprises two bits indicating one of absence of the ePDCCH transmission for the UE, presence of the ePDCCH transmission carrying an unlink assignment or power control information for the UE, and presence of the ePDCCH transmission carrying a downlink assignment for the UE, and wherein, when the two bits indicate the presence of the ePDCCH transmission carrying the uplink assignment or power control information, the at least one processor is further confirmed to; buffer and decode only resources corresponding to the ePDCCH transmission for the UE; and ignore remaining physical resource blocks (PRBs) of the subframe.
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16. An article of manufacture for determining whether an enhanced physical downlink control channel (ePDCCH) transmission exists for a user equipment (UE) in a subframe, comprising a non-transitory computer readable storage medium containing one or more programs, which when executed implement the steps of:
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receiving a transmission on physical downlink control channel (PDCCH) resources of the subframe; extracting downlink control information (DCI) from the PDCCH resources, the DCI comprising at least one bit indicating whether the ePDCCH transmission exists for the UE in the subframe; determining whether the ePDCCH transmission exists using the at least one bit; and buffering and decoding additional symbols of the subframe when the ePDCCH transmission exists, wherein the at least one bit comprises two bits indicating one of absence of the ePDCCH transmission for the UE, presence of the ePDCCH transmission carrying an uplink assignment or power control information for the UE, and presence of the ePDCCH transmission carrying a downlink assignment for the UE, and wherein, when the two bits indicate the presence of the ePDCCH transmission carrying the uplink assignment or power control information, buffering and decoding the additional symbols comprises; buffering and decoding only resources corresponding to the ePDCCH transmission for the UE; and ignoring remaining physical resource blocks (PRBs) of the subframe.
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Specification