Method, UE and Basestation for Reporting/Receiving HARQ ACK/NACK for PDSCH in Dynamic TDD Configurations

A method (1000) used in a User Equipment, UE, for reporting Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the method comprising:

• receiving (1010) a plurality of PDSCHs in DownLink, DL, subframes associated with an UpLink, UL, subframe and indicated by a DL reference TDD configuration;
• for each of the received PDSCHs,
• determining (1020) a Physical Uplink Control Channel (PUCCH) resource based on resources used in transmission of Physical Downlink Control Channels (PDCCHs) corresponding to the PDSCHs received in the corresponding DL subframe and a start position of the PUCCH resource corresponding to the DL subframe;
• and
• reporting (1030) HARQ ACK/NACK using the determined PUCCH resource.

A method (1200) used in a User Equipment, UE, for reporting Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the method comprising:

• receiving (1210) a plurality of PDSCHs in DownLink, DL, subframes associated with an UpLink, UL, subframe and indicated by a DL reference TDD configuration;
• selecting (1220) a DL subframe of the DL subframes, to be a first DL subframe, the sequence number of the selected DL subframe being the same as that of a first DL subframe of DL subframes associated with the UL subframe but indicated by an UL reference TDD configuration;
• assigning (1230) Physical Uplink Control Channel, PUCCH, resource indices based on resources used in transmission of PDCCHs corresponding to the PDSCHs received in the DL subframes associated with the UL subframe and indicated by the DL reference TDD configuration, wherein the PUCCH resource indices are assigned in an order starting from the selected first DL subframe of the DL subframes associated with the UL subframe and indicated by the DL reference TDD configuration;
• and
• for each of the received PDSCHs, reporting (1240) HARQ ACK/NACK using PUCCH resources in the order of the assigned PUCCH resource indices.

A User Equipment, UE, (1400) for reporting Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the UE (1400) comprising a receiver (1410), a transmitter (1420), a memory (1430) and a processor (1440),

• wherein
• the memory (1430) is configured to store TDD configurations;
• the processor (1440) is configured to control the receiver (1410) to receive a plurality of PDSCHs in DownLink, DL, subframes associated with an UpLink, UL, subframe and indicated by a DL reference TDD configuration;
• the processor (1440) is configured to divide the DL subframes into a first subset of DL subframes and a second subset of DL subframes, wherein the first subset of DL subframes is also indicated by an UL reference TDD configuration;
• the processor (1440) is configured to assign a first set of Physical Uplink Control Channel, PUCCH, resource indices based on resources used in transmission of Physical Downlink Control Channels, PDCCHs, corresponding to the PDSCHs received in the DL subframes of the first subset of DL subframes;
• the processor (1440) is configured to assign a second set of PUCCH resource indices based on resources used in transmission of PDCCHs corresponding to the PDSCHs received in the DL subframes of the second subset of DL subframes;
• and
• the processor (1440) is configured to control the transmitter (1420) to, for each of the received PDSCHs, report HARQ ACK/NACK using PUCCH resources in an order of the assigned first set of PUCCH resource indices for PDSCHs received in the DL subframes of the first subset of DL subframes and in an order of the assigned second set of PUCCH resource indices for PDSCHs received in the DL subframes of the second subset of DL subframes.

A User Equipment, UE, (1500) for reporting Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK, or non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the UE (1500) comprising a receiver (1510), a transmitter (1520), a memory (1530) and a processor (1540),

• wherein
• the memory (1530) is configured to store TDD configurations;
• the processor (1540) is configured to control the receiver (1510) to receive a plurality of PDSCHs in DownLink (DL) subframes associated with an UpLink (UL) subframe and indicated by a DL reference TDD configuration;
• the processor (1540) is configured to control the transmitter (1520) to, for each of the received PDSCHs, report HARQ ACK/NACK by at least partially using PUCCH resources indicated by Downlink Control Information, DCI and/or Radio Resource Control, RRC, signaling.

A User Equipment, UE, (1600) for reporting Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the UE (1600) comprising a receiver (1610), a transmitter (1620), a memory (1630) and a processor (1640),

• wherein
• the memory (1630) is configured to store TDD configurations;
• the processor (1640) is configured to control the receiver (1610) to receive a plurality of PDSCHs in DownLink, DL, subframes associated with an UpLink, UL, subframe and indicated by a DL reference TDD configuration;
• the processor (1640) is configured to, for each of the received PDSCHs, determine a Physical Uplink Control Channel, PUCCH, resource based on resources used in transmission of Physical Downlink Control Channels, PDCCHs, corresponding to the PDSCHs received in the corresponding DL subframe and a start position of the PUCCH resource corresponding to the DL subframe;
• and
• the processor (1640) is configured to control the transmitter (1620) to, for each of the received PDSCHs, report HARQ ACK/NACK using the determined PUCCH resource.

A User Equipment, UE, (1700) for reporting Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the UE (1700) comprising a receiver (1710), a transmitter (1720), a memory (1730) and a processor (1740),

• wherein
• the memory (1730) is configured to store TDD configurations;
• the processor (1740) is configured to control the receiver (1720) to receive a plurality of PDSCHs in DownLink, DL, subframes associated with an UpLink, UL, subframe and indicated by a DL reference TDD configuration;
• the processor (1740) is configured to select a DL subframe of the DL subframes, to be a first DL subframe, the sequence number of the selected DL subframe being the same as that of a first DL subframe of DL subframes associated with the UL subframe but indicated by an UL reference TDD configuration;
• the processor (1740) is configured to assign Physical Uplink Control Channel, PUCCH, resource indices based on resources used in transmission of PDCCHs corresponding to the PDSCHs received in the DL subframes associated with the UL subframe and indicated by the DL reference TDD configuration, wherein the PUCCH resource indices are assigned in an order starting from the selected first DL subframe of the DL subframes associated with the UL subframe and indicated by the DL reference TDD configuration;
• and
• the processor (1740) is configured to control the transmitter (1720) to, for each of the received PDSCHs, report HARQ ACK/NACK using PUCCH resources in the order of the assigned PUCCH resource indices.

A method (1800) used in a Base Station, BS, for receiving Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the method comprising:

• transmitting (1810) a plurality of PDSCHs in DownLink, DL, subframes associated with an UpLink, UL, subframe and indicated by a DL reference TDD configuration;
• dividing (1820) the DL subframes into a first subset of DL subframes and a second subset of DL subframes, wherein the first subset of DL subframes is also indicated by an UL reference TDD configuration;
• assigning (1830) a first set of Physical Uplink Control Channel, PUCCH, resource indices based on resources used in transmission of Physical Downlink Control Channels, PDCCHs, corresponding to the PDSCHs transmitted in the DL subframes of the first subset of DL subframes;
• assigning (1840) a second set of PUCCH resource indices based on resources used in transmission of PDCCHs corresponding to the PDSCHs transmitted in the DL subframes of the second subset of DL subframes;
• and
• for each of the transmitted PDSCHs, receiving (1850) HARQ ACK/NACK on PUCCH resources in an order of the assigned first set of PUCCH resource indices for PDSCHs transmitted in the DL subframes of the first subset of DL subframes and in an order of the assigned second set of PUCCH resource indices for PDSCHs transmitted in the DL subframes of the second subset of DL subframes.

A method (2200) used in a Base Station, BS, for receiving Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the method comprising:

• transmitting (2210) a plurality of PDSCHs in DownLink (DL) subframes associated with an UpLink (UL) subframe and indicated by a DL reference TDD configuration;
• for each of the transmitted PDSCHs,
• determining (2220) a Physical Uplink Control Channel, PUCCH, resource based on resources used in transmission of Physical Downlink Control Channels, PDCCHs, corresponding to the PDSCHs transmitted in the corresponding DL subframe and a start position of the PUCCH resource corresponding to the DL subframe;
• and
• receiving (2230) HARQ ACK/NACK on the determined PUCCH resource.

A method (2400) used in a Base Station, BS, for receiving Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the method comprising:

• transmitting (2410) a plurality of PDSCHs in DownLink, DL, subframes associated with an UpLink, UL, subframe and indicated by a DL reference TDD configuration;
• selecting (2420) a DL subframe of the DL subframes, to be a first DL subframe, the sequence number of the selected DL subframe being the same as that of a first DL subframe of DL subframes associated with the UL subframe but indicated by an UL reference TDD configuration;
• assigning (2430) Physical Uplink Control Channel, PUCCH, resource indices based on resources used in transmission of PDCCHs corresponding to the PDSCHs transmitted in the DL subframes associated with the UL subframe and indicated by the DL reference TDD configuration, wherein the PUCCH resource indices are assigned in an order starting from the selected first DL subframe of the DL subframes associated with the UL subframe and indicated by the DL reference TDD configuration;
• and
• for each of the transmitted PDSCHs, receiving (1240) HARQ ACK/NACK on PUCCH resources in the order of the assigned PUCCH resource indices.

A Base Station, BS, (2600) for receiving Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the BS (2600) comprising a receiver (2610), a transmitter (2620), a memory (2630) and a processor (2640),

• wherein
• the memory (2630) is configured to store TDD configurations;
• the processor (2640) is configured to control the transmitter (2620) to transmit a plurality of PDSCHs in DownLink, DL, subframes associated with an UpLink, UL, subframe and indicated by a DL reference TDD configuration;
• the processor (2640) is configured to divide the DL subframes into a first subset of DL subframes and a second subset of DL subframes, wherein the first subset of DL subframes is also indicated by an UL reference TDD configuration;
• the processor (2640) is configured to assign a first set of Physical Uplink Control Channel, PUCCH, resource indices based on resources used in transmission of Physical Downlink Control Channels, PDCCHs, corresponding to the PDSCHs transmitted in the DL subframes of the first subset of DL subframes;
• the processor (2640) is configured to assign a second set of PUCCH resource indices based on resources used in transmission of PDCCHs corresponding to the PDSCHs transmitted in the DL subframes of the second subset of DL subframes;
• and
• the processor (2640) is configured to control the receiver (2610) to, for each of the transmitted PDSCHs, receive HARQ ACK/NACK on PUCCH resources in an order of the assigned first set of PUCCH resource indices for PDSCHs transmitted in the DL subframes of the first subset of DL subframes and in an order of the assigned second set of PUCCH resource indices for PDSCHs transmitted in the DL subframes of the second subset of DL subframes.

A Base Station, BS, (2700) for receiving Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK, or non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the BS (2700) comprising a receiver (2710), a transmitter (2720), a memory (2730) and a processor (2740),

• wherein
• the memory (2730) is configured to store TDD configurations;
• the processor (2740) is configured to control the transmitter (2720) to transmit a plurality of PDSCHs in DownLink, DL, subframes associated with an UpLink, UL, subframe and indicated by a DL reference TDD configuration;
• the processor (2740) is configured to control the receiver (2710) to, for each of the transmitted PDSCHs, receive HARQ ACK/NACK at least partially on PUCCH resources indicated by Downlink Control Information, DCI and/or Radio Resource Control, RRC, signaling.

A Base Station, BS, (2800) for receiving Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the BS (2800) comprising a receiver (2810), a transmitter (2820), a memory (2830) and a processor (2840),

• wherein
• the memory (2830) is configured to store TDD configurations;
• the processor (2840) is configured to control the transmitter (2820) to transmit a plurality of PDSCHs in DownLink (DL) subframes associated with an UpLink (UL) subframe and indicated by a DL reference TDD configuration;
• the processor (2840) is configured to, for each of the transmitted PDSCHs, determine a Physical Uplink Control Channel, PUCCH, resource based on resources used in transmission of Physical Downlink Control Channels, PDCCHs, corresponding to the PDSCHs transmitted in the corresponding DL subframe and a start position of the PUCCH resource corresponding to the DL subframe;
• and
• the processor (2840) is configured to control the receiver (2810) to, for each of the transmitted PDSCHs, receive HARQ ACK/NACK on the determined PUCCH resource.

A Base Station, BS, (2900) for receiving Hybrid Automatic Repeat Request, HARQ, acknowledgement, ACK,/non-acknowledgement, NACK, for Physical Downlink Shared Channels, PDSCHs, in dynamic time division duplex, TDD, configurations, the BS (2900) comprising a receiver (2910), a transmitter (2920), a memory (2930) and a processor (2940),

• wherein
• the memory (2930) is configured to store TDD configurations;
• the processor (2940) is configured to control the transmitter (2910) to transmit a plurality of PDSCHs in DownLink, DL, subframes associated with an UpLink, UL, subframe and indicated by a DL reference TDD configuration;
• the processor (2940) is configured to select a DL subframe of the DL subframes, to be a first DL subframe, the sequence number of the selected DL subframe being the same as that of a first DL subframe of DL subframes associated with the UL subframe but indicated by an UL reference TDD configuration;
• the processor (2940) is configured to assign Physical Uplink Control Channel, PUCCH, resource indices based on resources used in transmission of PDCCHs corresponding to the PDSCHs transmitted in the DL subframes associated with the UL subframe and indicated by the DL reference TDD configuration, wherein the PUCCH resource indices are assigned in an order starting from the selected first DL subframe of the DL subframes associated with the UL subframe and indicated by the DL reference TDD configuration;
• and
• the processor (2940) is configured to control the receiver (2910) to, for each of the transmitted PDSCHs, receive HARQ ACK/NACK on PUCCH resources in the order of the assigned PUCCH resource indices.