Hybrid Automatic Repeat Request Acknowledgment Codebook Reception
A base station transmits one or more messages comprising one or more configuration parameters indicating: a first subcarrier spacing for a first bandwidth part (BWP) of a scheduling cell, and a second subcarrier spacing for a second BWP of a scheduled cell different from the scheduling cell. The first subcarrier spacing is lower than the second subcarrier spacing. The base station transmits, in a control channel monitoring occasion in a time slot of the scheduling cell and via the scheduling cell, a plurality of downlink control information (DCIs) scheduling transport blocks (TBs) for the scheduled cell, wherein a number of the plurality of DCIs is based on the first subcarrier spacing and the second subcarrier spacing. The base station receives an acknowledgment codebook comprising acknowledgment information bits of the TBs. The acknowledgement information bits are ordered, in the acknowledgment codebook, based on starting times associated with the TBs.
1 . A method comprising:
transmitting, by a base station, one or more messages comprising one or more configuration parameters indicating:
a first subcarrier spacing for a first bandwidth part (BWP) of a scheduling cell; and
a second subcarrier spacing for a second BWP of a scheduled cell different from the scheduling cell, wherein the first subcarrier spacing is lower than the second subcarrier spacing;
transmitting, in a control channel monitoring occasion in a time slot of the scheduling cell and via the scheduling cell, a plurality of downlink control information (DCIs) scheduling transport blocks (TBs) for the scheduled cell, wherein a number of the plurality of DCIs is based on the first subcarrier spacing and the second subcarrier spacing; and
receiving an acknowledgment codebook comprising acknowledgment information bits of the TBs, wherein the acknowledgement information bits are ordered, in the acknowledgment codebook, based on starting times associated with the TBs.
2 . The method of claim 1 , wherein each DCI of the plurality of DCIs indicates a same uplink time slot for transmission of acknowledgement information of a respective TB of the TBs.
3 . The method of claim 1 , wherein each DCI of the plurality of DCIs schedules a respective TB of the TBs.
4 . The method of claim 1 , wherein the plurality of DCIs are a plurality of unicast DCIs.
5 . The method of claim 1 , wherein:
the order of the acknowledgement information bits is based on an ascending order of the starting times associated with the TBs; and
each TB of the TBs is ordered in a respective time of the starting times.
6 . The method of claim 1 , wherein the order of the acknowledgement information of the TBs is based on the starting times associated with the TBs is in response to receiving the plurality of DCIs in the same control channel monitoring occasion of the same cell.
7 . The method of claim 1 , wherein the number of the plurality of DCIs is:
two in response to the first subcarrier spacing and the second subcarrier spacing being 30 KHz and 60 KHz, respectively; and
four in response to the first subcarrier spacing and the second subcarrier spacing being:
15 kHz and 60 KHz, respectively; or
30 KHz and 120 kHz, respectively.
8 . A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the base station to:
transmit, one or more messages comprising one or more configuration parameters indicating:
a first subcarrier spacing for a first bandwidth part (BWP) of a scheduling cell; and
a second subcarrier spacing for a second BWP of a scheduled cell different from the scheduling cell, wherein the first subcarrier spacing is lower than the second subcarrier spacing;
transmit, in a control channel monitoring occasion in a time slot of the scheduling cell and via the scheduling cell, a plurality of downlink control information (DCIs) scheduling transport blocks (TBs) for the scheduled cell, wherein a number of the plurality of DCIs is based on the first subcarrier spacing and the second subcarrier spacing; and
receive an acknowledgment codebook comprising acknowledgment information bits of the TBs, wherein the acknowledgement information bits are ordered, in the acknowledgment codebook, based on starting times associated with the TBs.
9 . The base station of claim 8 , wherein each DCI of the plurality of DCIs indicates a same uplink time slot for transmission of acknowledgement information of a respective TB of the TBs.
10 . The base station of claim 8 , wherein each DCI of the plurality of DCIs schedules a respective TB of the TBs.
11 . The base station of claim 8 , wherein the plurality of DCIs are a plurality of unicast DCIs.
12 . The base station of claim 8 , wherein:
the order of the acknowledgement information bits is based on an ascending order of the starting times associated with the TBs; and
each TB of the TBs is ordered in a respective time of the starting times.
13 . The base station of claim 8 , wherein the order of the acknowledgement information of the TBs is based on the starting times associated with the TBs is in response to receiving the plurality of DCIs in the same control channel monitoring occasion of the same cell.
14 . The base station of claim 8 , wherein the number of the plurality of DCIs is:
two in response to the first subcarrier spacing and the second subcarrier spacing being 30 KHz and 60 kHz, respectively; and
four in response to the first subcarrier spacing and the second subcarrier spacing being:
15 kHz and 60 kHz, respectively; or
30 KHz and 120 kHz, respectively.
15 . A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a base station, cause the base station to:
transmit, one or more messages comprising one or more configuration parameters indicating:
a first subcarrier spacing for a first bandwidth part (BWP) of a scheduling cell; and
a second subcarrier spacing for a second BWP of a scheduled cell different from the scheduling cell, wherein the first subcarrier spacing is lower than the second subcarrier spacing;
transmit, in a control channel monitoring occasion in a time slot of the scheduling cell and via the scheduling cell, a plurality of downlink control information (DCIs) scheduling transport blocks (TBs) for the scheduled cell, wherein a number of the plurality of DCIs is based on the first subcarrier spacing and the second subcarrier spacing; and
receive an acknowledgment codebook comprising acknowledgment information bits of the TBs, wherein the acknowledgement information bits are ordered, in the acknowledgment codebook, based on starting times associated with the TBs.
16 . The non-transitory computer-readable medium of claim 15 , wherein each DCI of the plurality of DCIs indicates a same uplink time slot for transmission of acknowledgement information of a respective TB of the TBs.
17 . The non-transitory computer-readable medium of claim 15 , wherein each DCI of the plurality of DCIs schedules a respective TB of the TBs.
18 . The non-transitory computer-readable medium of claim 15 , wherein the plurality of DCIs are a plurality of unicast DCIs.
19 . The non-transitory computer-readable medium of claim 15 , wherein:
the order of the acknowledgement information bits is based on an ascending order of the starting times associated with the TBs; and
each TB of the TBs is ordered in a respective time of the starting times.
20 . The non-transitory computer-readable medium of claim 15 , wherein the order of the acknowledgement information of the TBs is based on the starting times associated with the TBs is in response to receiving the plurality of DCIs in the same control channel monitoring occasion of the same cell.