Terminal apparatus, base station apparatus, communication method, and integrated circuit
AssigneesSharp Kabushiki Kaisha, FG Innovation Company Limited
InventorsLiqing LIU, Shoichi SUZUKI, Tomoki YOSHIMURA, Wataru OUCHI
Life of this patent
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Abstract
A terminal apparatus receives a PDCCH including a DCI format, and performs PUSCH transmission based on detection of the PDCCH. In an HARQ process corresponding to the PUSCH transmission, a value of an UL HARQ Round Trip Timer (RTT) timer for the HARQ process is provided based at least on a first condition and/or a second condition. The first condition is that a search space for the PDCCH detected is either a common search space or a UE-specific search space. The second condition is that a type of the HARQ process is either a synchronous HARQ or an asynchronous HARQ.
Claims9
1-15. (canceled)
A terminal apparatus comprising:
- reception circuitry configured and/or programmed to receive a first physical downlink control channel (PDCCH) with downlink control information (DCI) format for frequency division duplex (FDD);
- and
- transmission circuitry configured and/or programmed to perform uplink transmission in physical uplink shared channel (PUSCH) upon a detection of the first PDCCH,
- wherein, for a hybrid auto repeat request (HARQ) process corresponding to the uplink transmission, a value of uplink HARQ round trip time (RTT) timer for the HARQ process is given based on whether or not the HARQ process uses short processing time, and
- the value of the HARQ RTT timer is a minimum amount of subframe before a grant scheduling an uplink retransmission is expected and the grant is received on a second PDCCH.
A base station apparatus comprising:
- transmission circuitry configured and/or programmed to transmit a first physical downlink control channel (PDCCH) with downlink control information (DCI) format for frequency division duplex (FDD);
- and
- reception circuitry configured and/or programmed to perform uplink reception in physical uplink shared channel (PUSCH),
- wherein, for a hybrid auto repeat request (HARQ) process corresponding to the uplink transmission, a value of uplink HARQ round trip time (RTT) timer for the HARQ process is given based on whether or not the HARQ process uses short processing time, and
- the value of the HARQ RTT timer is a minimum amount of subframe before a grant scheduling an uplink retransmission is expected and the grant is received on a second PDCCH.
A communication method used for a terminal apparatus, the communication method comprising:
- receiving a first physical downlink control channel (PDCC) with downlink control information (DCI) format for frequency division duplex (FDD);
- and
- performing uplink transmission in physical uplink shared channel (PUSCH) upon a detection of the first PDCCH,
- wherein, for a hybrid auto repeat request (HARQ) process corresponding to the uplink transmission, a value of uplink HARQ round trip time (RTT) timer for the HARQ process is given based on whether or not the HARQ process uses short processing time, and
- the value of the HARQ RTT timer is a minimum amount of subframe before a grant scheduling an uplink retransmission is expected and the grant is received on a second PDCCH.
A communication method used for a base station apparatus, the communication method comprising:
- transmitting a first physical downlink control channel (PDCCH) with downlink control information (DCI) format for frequency division duplex (FDD);
- and
- performing uplink reception in physical uplink shared channel (PUSCH),
- wherein, for a hybrid auto repeat request (HARQ) process corresponding to the uplink transmission, a value of uplink HARQ round trip time (RTT) timer for the HARQ process is given based on whether or not the HARQ process uses short processing time, and
- the value of the HARQ RTT timer is a minimum amount of subframe before a grant scheduling an uplink retransmission is expected and the grant is received on a second PDCCH.
Dependencies are inferred from the claim text.