User Equipment, base stations and methods
View Patent ↗A user equipment (UE) is described. A higher-layer processor is configured to configure a short processing time. A physical downlink control channel (PDCCH) receiver is configured to receive, in a subframe n, a PDCCH. A physical downlink shared channel (PDSCH) receiver is configured to receive, in the subframe n, a PDSCH corresponding to the PDCCH. An uplink receiver is configured to feedback, in a subframe n+k, a hybrid automatic repeat request-acknowledgement (HARQ-ACK) corresponding to the PDSCH. In a case that the PDCCH is a PDCCH in common search space, the k is equal to k 1 . In a case that the PDCCH is a PDCCH in UE-specific search space, the k is equal to k 2 . The k 2 is smaller than the k 1 .
1. A terminal apparatus comprising:
a higher-layer processor configured to acquire information indicating a configuration of a short processing time;
a physical downlink control channel (PDCCH) receiver configured to receive a PDCCH in a subframe n;
a physical downlink shared channel (PDSCH) receiver configured to receive a PDSCH corresponding to the PDCCH; and
an uplink transmitter configured to transmit a hybrid automatic repeat request-acknowledgement (HARQ-ACK) in a subframe n+k for the PDSCH, wherein
in a case that the information is not acquired, the k is equal to k 1 ,
in a case that the information is acquired and the PDCCH is a PDCCH in common search space, the k is equal to k 1 ,
in a case that the information is acquired and the PDCCH is a PDCCH in UE-specific search space, the k is equal to k 2 , and
the k 2 is smaller than the k 1 , wherein the k 1 and k 2 are positive values.
2. A base station apparatus comprising:
a higher-layer processor configured to send, for a terminal apparatus, information indicating a configuration of a short processing time;
a physical downlink control channel (PDCCH) transmitter configured to transmit a PDCCH in a subframe n;
a physical downlink shared channel (PDSCH) transmitter configured to transmit a PDSCH corresponding to the PDCCH; and
an uplink receiver configured to obtain a hybrid automatic repeat request-acknowledgement (HARQ-ACK) in a subframe n+k for the PDSCH, wherein
in a case that the information is not acquired, the k is equal to k 1 ,
in a case that the information is acquired and the PDCCH is a PDCCH in common search space, the k is equal to k 1 ,
in a case that the information is acquired and the PDCCH is a PDCCH in UE-specific search space, the k is equal to k 2 , and
the k 2 is smaller than the k 1 , wherein the k 1 and k 2 are positive values.
3. A method for a terminal apparatus, the method comprising:
acquiring information indicating a configuration of a short processing time;
receiving a physical downlink control channel (PDCCH) in a subframe n;
receiving a physical downlink shared channel (PDSCH) corresponding to the PDCCH; and
transmitting a hybrid automatic repeat request-acknowledgement (HARQ-ACK) in a subframe n+k for the PDSCH, wherein
in a case that the information is not acquired, the k is equal to k 1 ,
in a case that the information is acquired and the PDCCH is a PDCCH in common search space, the k is equal to k 1 ,
in a case that the information is acquired and the PDCCH is a PDCCH in UE-specific search space, the k is equal to k 2 , and
the k 2 is smaller than the k 1 , wherein the k 1 and k 2 are positive values.
4. A method for a base station apparatus, the method comprising:
sending, for a terminal apparatus, information indicating a configuration of a short processing time;
transmitting a physical downlink control channel (PDCCH) in a subframe n;
transmitting a physical downlink shared channel (PDSCH) corresponding to the PDCCH; and
obtaining a hybrid automatic repeat request-acknowledgement (HARQ-ACK) in a subframe n+k for the PDSCH, wherein
in a case that the information is not acquired, the k is equal to k 1 ,
in a case that the information is acquired and the PDCCH is a PDCCH in common search space, the k is equal to k 1 ,
in a case that the information is acquired and the PDCCH is a PDCCH in UE-specific search space, the k is equal to k 2 , and
the k 2 is smaller than the k 1 , wherein the k 1 and k 2 are positive values.