Method and apparatus for time domain resource allocation
Embodiments of the present disclosure relate to time domain resource allocation for uplink and downlink transmissions. According to some embodiments of the disclosure, a method may include: receiving a DCI format scheduling a plurality of PDSCHs or a plurality of PUSCHs on a plurality of carriers, wherein each PDSCH or PUSCH is scheduled on a corresponding carrier, and the DCI format includes a first indicator indicating a first time domain resource allocation pattern from a first set of time domain resource allocation patterns for the plurality of PDSCHs or PUSCHs; and receiving the plurality of PDSCHs or transmitting the plurality of PUSCHs on a plurality of time domain resources within a plurality of slots based on the first time domain resource allocation pattern, wherein each of the plurality of time domain resources is within a corresponding one of the plurality of slots.
1 . A user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled to the at least one memory and operable to cause the UE to:
receive configuration information for a first set of time domain resource allocation patterns for multi-cell scheduling, wherein the first set of time domain resource allocation patterns comprises a plurality of entries, and wherein each entry contains time domain resource assignment information for a plurality of cells;
receive a downlink control information (DCI) format scheduling a plurality of physical downlink shared channels (PDSCHs) or a plurality of physical uplink shared channels (PUSCHs) on a plurality of carriers, wherein each PDSCH of the plurality of PDSCHs or each PUSCH of the plurality of PUSCHs is scheduled on a corresponding carrier of the plurality of carriers, and wherein the DCI format includes a first indicator indicating a first time domain resource allocation pattern from the first set of time domain resource allocation patterns for the plurality of PDSCHs or the plurality of PUSCHs; and
receive the plurality of PDSCHs or transmit the plurality of PUSCHs on a plurality of time domain resources within a plurality of slots based at least in part on the first time domain resource allocation pattern, wherein each of the plurality of time domain resources is within a corresponding slot of the plurality of slots.
2 . The UE of claim 1 , wherein the first set of time domain resource allocation patterns includes at least one time domain resource allocation pattern indicating a single time domain resource for one or more of a single PDSCH or a single PUSCH.
3 . The UE of claim 1 , wherein a size of the first indicator is determined based at least in part on a number of time domain resource allocation patterns in the first set of time domain resource allocation patterns.
4 . The UE of claim 1 , wherein for each of the one or more of the plurality of PDSCHs or the plurality of PUSCHs, the first time domain resource allocation pattern indicates a respective slot level offset, a respective mapping type, a respective starting symbol, and a respective length.
5 . The UE of claim 1 , wherein the first time domain resource allocation pattern indicates at least one of:
a single slot level offset, a respective mapping type, and a respective starting symbol and length for each of the one or more of the plurality of PDSCHs or the plurality of PUSCHs;
a single slot level offset, a single mapping type, and a respective starting symbol and length for each of the one or more of the plurality of PDSCHs or the plurality of PUSCHs; or
a single slot level offset, a single mapping type, and a single starting symbol and length, and a total number of PDSCHs or PUSCHs scheduled by the first time domain resource allocation pattern.
6 . The UE of claim 5 , wherein the processor is configured to cause the UE to:
determine, based at least in part on the single slot level offset, a first slot of the plurality of slots on a carrier with a highest subcarrier spacing (SCS) value among the plurality of carriers, wherein remaining slots of the plurality of slots on remaining carriers of the plurality of carriers overlap the first slot in time domain; or
determine, based at least in part on the single slot level offset, a first slot of the plurality of slots on a carrier with a lowest subcarrier spacing (SCS) value among the plurality of carriers, wherein remaining slots of the plurality of slots on remaining carriers of the plurality of carriers comprise slots first to overlap the first slot in time domain.
7 . The UE of claim 1 , wherein the DCI format further includes a second indicator indicating the first set of time domain resource allocation patterns from at least two sets of time domain resource allocation patterns.
8 . The UE of claim 7 , wherein the first set of time domain resource allocation patterns is configured for scheduling at least one of more than one PDSCH or more than one PUSCH.
9 . The UE of claim 7 , wherein a second set of time domain resource allocation patterns of the at least two sets of time domain resource allocation patterns is configured for scheduling one or more of a single PDSCH or a single PUSCH.
10 . The UE of claim 1 , wherein the first time domain resource allocation pattern is applied to a first carrier of the plurality of carriers, wherein the first carrier comprises a new radio (NR)-only carrier.
11 . The UE of claim 10 , wherein:
in an event that a subcarrier spacing (SCS) value of a second carrier of the plurality of carriers on which an LTE system is operated is a same SCS as that of the first carrier, a slot of the plurality of slots on the second carrier is the same slot scheduled on the first carrier;
in an event that the SCS value of the second carrier is smaller than that of the first carrier, the slot of the plurality of slots on the second carrier overlaps the slot scheduled on the first carrier in time domain; and
in an event that the SCS value of the second carrier is larger than that of the first carrier, the slot of the plurality of slots on the second carrier is a slot first to overlap the slot scheduled on the first carrier in time domain.
12 . The UE of claim 10 , wherein the DCI format further includes a third indicator indicating a symbol set from a plurality of symbol sets, and each of the plurality of symbol sets comprises contiguous symbols in time domain within a same slot for transmission of one or more of PDSCH or PUSCH.
13 . The UE of claim 12 , wherein a code point of the third indicator indicates that the plurality of carriers excludes a carrier on which an LTE system is operated.
14 . The UE of claim 12 , wherein a smallest symbol index in the symbol set is configured without overlapping a symbol occupied by an LTE cell reference signal (CRS) in time domain.
15 . A method performed by a user equipment (UE), the method comprising:
receiving configuration information for a first set of time domain resource allocation patterns for multi-cell scheduling, wherein the first set of time domain resource allocation patterns comprises a plurality of entries, and wherein each entry contains time domain resource assignment information for a plurality of cells;
receiving a downlink control information (DCI) format scheduling a plurality of physical downlink shared channels (PDSCHs) or a plurality of physical uplink shared channels (PUSCHs) on a plurality of carriers, wherein each PDSCH of the plurality of PDSCHs or each PUSCH of the plurality of PUSCHs is scheduled on a corresponding carrier of the plurality of carriers, and wherein the DCI format includes a first indicator indicating a first time domain resource allocation pattern from the first set of time domain resource allocation patterns for the one or more of the plurality of PDSCHs or the plurality of PUSCHs; and
receiving the plurality of PDSCHs or transmitting the plurality of PUSCHs on a plurality of time domain resources within a plurality of slots based at least in part on the first time domain resource allocation pattern, wherein each of the plurality of time domain resources is within a corresponding slot of the plurality of slots.
16 . The method of claim 15 , wherein the first set of time domain resource allocation patterns includes at least one time domain resource allocation pattern indicating a single time domain resource for one or more of a single PDSCH or a single PUSCH.
17 . The method of claim 15 , wherein a size of the first indicator is determined based at least in part on a number of time domain resource allocation patterns in the first set of time domain resource allocation patterns.
18 . The method of claim 15 , wherein for each of the one or more of the plurality of PDSCHs or the plurality of PUSCHs, the first time domain resource allocation pattern indicates a respective slot level offset, a respective mapping type, a respective starting symbol, and a respective length.
19 . The method of claim 15 , wherein the first time domain resource allocation pattern indicates at least one of:
a single slot level offset, a respective mapping type, and a respective starting symbol and length for each of the one or more of the plurality of PDSCHs or the plurality of PUSCHs;
a single slot level offset, a single mapping type, and a respective starting symbol and length for each of the one or more of the plurality of PDSCHs or the plurality of PUSCHs; or
a single slot level offset, a single mapping type, and a single starting symbol and length, and a total number of PDSCHs or PUSCHs scheduled by the first time domain resource allocation pattern.
20 . A base station for wireless communication, comprising:
at least one memory; and
at least one processor coupled to the at least one memory and operable to cause the base station to:
transmit configuration information for a first set of time domain resource allocation patterns for multi-cell scheduling, wherein the first set of time domain resource allocation patterns comprises a plurality of entries, and wherein each entry contains time domain resource assignment information for a plurality of cells in a scheduled cell set;
transmit a downlink control information (DCI) format scheduling a plurality of physical downlink shared channels (PDSCHs) or a plurality of physical uplink shared channels (PUSCHs) on a plurality of carriers, wherein each PDSCH of the plurality of PDSCHs or each PUSCH of the plurality of PUSCHs is scheduled on a corresponding carrier of the plurality of carriers, and wherein the DCI format includes a first indicator indicating a first time domain resource allocation pattern from the first set of time domain resource allocation patterns for the plurality of PDSCHs or the plurality of PUSCHs; and
transmit the plurality of PDSCHs or receive the plurality of PUSCHs on a plurality of time domain resources within a plurality of slots based at least in part on the first time domain resource allocation pattern, wherein each of the plurality of time domain resources is within a corresponding slot of the plurality of slots.