HARQ-ACK signal transmission in response to detection of control channel type in case of multiple control channel types
AssigneeSamsung Electronics Co., Ltd.
InventorsAris Papasakellariou, Joon-Young Cho
Life of this patent
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Abstract
Methods and apparatus are described for a User Equipment (UE) to transmit and for a base station to receive a Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) signal in a resource of a Physical Uplink Control CHannel (PUCCH). The HARQ-ACK signal is transmitted from the UE in response to a detection of a PDCCH transmitted from the base station and conveying a DCI format that, depending on the PDCCH type, can include a HARQ-ACK PUCCH Resource Offset (HPRO) information field. The UE and the NodeB determine the PUCCH resource depending on the PDCCH type and, if the DCI format includes the HPRO, also depending on a PDCCH transmission type.
Claims32
A method of a user equipment (UE) for transmitting a hybrid automatic repeat request acknowledgement (HARQ-ACK) signal on a physical uplink control channel (PUCCH), the method comprising the steps of:
- receiving, by the UE, configuration information indicating a first set of physical resource blocks (PRBs) for localized transmission on a first physical downlink control channel (PDCCH) or indicating a second set of PRBs for distributed transmission on a second PDCCH, wherein a PRB includes contiguous frequency resource elements (REs) over a transmission time interval (TTI);
- receiving, by the UE, downlink control information (DCI) on the first PDCCH or the second PDCCH using respective control channel elements (CCEs), wherein the DCI includes a HARQ-ACK PUCCH resource offset (HPRO) information field, and wherein the UE receives the DCI on the first PDCCH based on a demodulation reference signal (DMRS) corresponding to an index NDMRS;
- determining, by the UE, a first PUCCH resource based on a first CCE index, the NDMRS, the HPRO information field, and a first offset assigned to the UE from the base station, if the UE receives the DCI on the first PDCCH;
- determining, by the UE, a second PUCCH resource based on the first CCE index, the HPRO information field, and a second offset assigned to the UE from the base station, if the UE receives the DCI on the second PDCCH;
- and
- transmitting, by the UE, the HARQ-ACK signal associated with the DCI on the determined first or second PUCCH resource.
A method of a base station for receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) signal in a physical uplink control channel (PUCCH), the method comprising the steps of:
- transmitting, by the base station, to the UE, configuration information indicating a first set of physical resource blocks (PRBs) for localized transmission on a first physical downlink control channel (PDCCH) or indicating a second set of PRBs for distributed transmission on a second PDCCH, wherein a PRB includes contiguous frequency resource elements (REs) over a transmission time interval (TTI);
- transmitting, by the base station, downlink control information (DCI) on the first PDCCH or the second PDCCH using respective control channel elements (CCEs), wherein the DCI includes a HARQ-ACK PUCCH resource offset (HPRO) information field;
- transmitting, by the base station, a demodulation reference signal (DMRS) corresponding to an index NDMRS, wherein the DMRS is associated with the first PDCCH;
- determining, by the base station, a first PUCCH resource based on a first CCE index, the NDMRS, the HPRO information field, and a first offset, if the base station transmits the DCI on the first PDCCH;
- determining, by the base station, a second PUCCH resource based on the first CCE index, the HPRO information field, and a second offset, if the base station transmits the DCI on the second PDCCH;
- and
- receiving, by the base station, the HARQ-ACK signal associated with the DCI on the determined first or second PUCCH resource.
A user equipment (UE) apparatus for transmitting a hybrid automatic repeat request acknowledgement (HARQ-ACK) signal in a physical uplink control channel (PUCCH), the apparatus comprising:
- a receiver configured to:
- receive a first offset and a second offset;
- receive configuration information indicating a first set of physical resource blocks (PRBs) for localized transmission on a first physical downlink control channel (PDCCH) or indicating a second set of PRBs for distributed transmission on a second PDCCH, wherein a PRB comprises contiguous frequency resource elements (REs) over a transmission time interval (TTI);
- and
- receive downlink control information (DCI) on the first PDCCH or the second PDCCH over respective control channel elements (CCEs), wherein DCI includes a HARQ-ACK PUCCH resource offset (HPRO) information field, and wherein reception on the first PDCCH based on a demodulation reference signal (DMRS) corresponding to an index NDMRS;
- a processor configured to determine a first PUCCH resource based on a first CCE index, the NDMRS, the HPRO information field, and the first offset, if the UE apparatus receives the DCI on the first PDCCH, and determine a second PUCCH resource based on the first CCE index, the HPRO information field, and the second offset, if the UE apparatus receives the DCI on the second PDCCH;
- and
- a transmitter configured to transmit the HARQ-ACK signal associated with the DCI based on the determined first or second PUCCH resource.
A base station apparatus for receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) signal in a physical uplink control channel (PUCCH), the apparatus comprising:
- a transmitter configured to transmit a first offset and a second offset, to transmit configuration information indicating a first set of physical resource blocks (PRBs) for localized transmission on a first physical downlink control channel (PDCCH) or indicating a second set of PRBs for distributed transmission on second PDCCH, wherein a PRB comprises a number of contiguous frequency resource elements (REs) over a transmission time interval (TTI), to transmit downlink control information (DCI) on the first PDCCH or the second PDCCH using respective control channel elements (CCEs), wherein DCI includes a HARQ-ACK PUCCH resource offset (HPRO) information field, and to transmit a demodulation reference signal (DMRS) corresponding to an index NDMRS, wherein the DMRS is associated with the first PDCCH;
- a processor configured to determine a first PUCCH resource based on a first CCE index, the NDMRS, the HPRO information field, and the first offset, if the base station apparatus transmits the DCI on the first PDCCH, and to determine a second PUCCH resource based on the first CCE index, the HPRO information field, and the second offset, if the base station apparatus transmits the DCI on the second PDCCH;
- and
- a receiver configured to receive the HARQ-ACK signal associated with the DCI based on the determined first or second PUCCH resource.
Dependencies are inferred from the claim text.