Uplink channel multiplexing method and device, and terminal
Embodiments of the present application provide an uplink channel multiplexing method and device, and a terminal. The method comprises: when a terminal needs to transmit a plurality of overlapping physical uplink control channels (PUCCHs) and/or physical uplink shared channels (PUSCHs) on the same time slot or sub slot, if one of the PUCCH transmissions or PUSCH transmissions corresponds to the format of downlink control information (DCI) detected by the terminal, the terminal expects that a start symbol S0 of the earliest PUCCH or PUSCH in the overlapping PUCCHs and/or PUSCHs satisfies a first condition. The solution of the present application can avoid the case of an error and the case that a base station cannot control a terminal, satisfies latency and reliability requirements of a URLLC service, and improves system spectral efficiency.
1 . A method for uplink channel multiplexing, applied to a terminal and comprising:
when a terminal would transmit multiple overlapping Physical Uplink Control Channels (PUCCHs) in a same slot or sub-slot, when one of the PUCCH transmissions is in response to a Downlink Control Information (DCI) format detected by the terminal, determining, by the terminal, whether a start symbol S0 of an earliest PUCCH among the overlapping PUCCHs satisfies a first condition;
wherein the first condition satisfied by the start symbol S0 of the earliest PUCCH among the overlapping PUCCHs comprises at least one of the following:
the start symbol S0 is not before a first symbol, a Cyclic Prefix (CP) of the first symbol S0 starts at a first time after a last symbol of any corresponding Physical Downlink Shared Channel (PDSCH), and Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) corresponding to the any corresponding PDSCH has a same first priority index; and
the start symbol S0 is not before a third symbol, a CP of the third symbol starts at a third time after a last symbol of any Semi-Persistent Scheduling (SPS) PDSCH release, and an HARQ-ACK corresponding to the any SPS PDSCH release has the same first priority index,
wherein the method further comprises:
determining a resource set, wherein the resource set comprises a PUCCH resource for transmitting the PUCCH in a single slot or sub-slot; and
removing the PUCCH resource from the resource set in a case that the PUCCH resource cannot satisfy the first condition.
2 . The method for uplink channel multiplexing of claim 1 , further comprising at least one of the following:
determining bitrates of Uplink Control Information (UCI) of different priority indexes transmitted on a PUCCH; or
determining content transmitted on the PUCCH in the resource set.
3 . The method for uplink channel multiplexing of claim 2 , wherein the determining content transmitted on the PUCCH in the resource set comprises:
the PUCCH being required to transmit a first UCI set, in a case that a number of bits that can be carried by the PUCCH resource, that is determined according to a number of Physical Resource Blocks (PRBs) configured in the PUCCH and a modulation order and bitrate of the first UCI set, is greater than or equal to a number of bits of the first UCI set, determining a minimum number of PRBs to be a first number of PRBs according to the number of bits of the first UCI set, the number of PRBs configured in the PUCCH, and the modulation order and bitrate of the first UCI set, and transmitting the first UCI set by using the first number of PRBs;
in a case that the number of bits that can be carried by the PUCCH resource, that is determined according to the number of PRBs configured in the PUCCH and the modulation order and bitrate of the UCI, is less than the number of bits of the first UCI set, transmitting a second UCI set, wherein the second UCI set satisfies the following conditions:
the second UCI set being a sub-set of the first UCI set, and
the number of bits that can be carried by the PUCCH resource, that is determined according to the number of PRBs configured in the PUCCH and the modulation order and bitrate of the second UCI set, being greater than or equal to the number of bits of the second UCI set; and
the first UCI set comprising at least one of the following UCI:
a HARQ-ACK, a Scheduling Request (SR), a wideband Channel State Information (CSI) report, and a sub-band CSI report of a first priority index, wherein a number of bits occupied by the HARQ-ACK of the first priority index is O H-ACK , a number of bits occupied by the SR of the first priority index is O H-SR , and a numbers of bits occupied by each of the wideband CSI report and the sub-band CSI report of the first priority index is O H-CSI ; and
a HARQ-ACK, an SR, a wideband CSI report, a sub-band CSI report, or a Cyclic Redundancy Check (CRC) of a second priority index, wherein a number of bits occupied by the HARQ-ACK of the second priority index is O L-ACK , a number of bits occupied by the SR of the second priority index is O L-SR , a numbers of bits occupied by each of the wideband CSI report and the sub-band CSI report of the second priority index is O L-CSI , and a number of bits occupied by the CRC of the second priority index is O CRC .
4 . The method for uplink channel multiplexing of claim 3 , wherein the determining the second UCI set comprises:
selecting UCI from the first UCI set according to a first sequence, so as to determine the second UCI set;
wherein the first sequence comprises at least one of the following:
the UCI of the first priority index being selected in preference to the UCI of the second priority index;
the HARQ-ACK and the SR being selected in preference to the CSI when the priority index is the same;
a first part of the CSI being selected in preference to a second part of the CSI when the priority index is the same; or
one with a higher priority among the first part of the CSI and the second part of the CSI being selected in preference when the priority index is the same.
5 . A terminal, comprising:
a memory storing instructions; and
a processor, configured to, when executing the instructions, perform the method of claim 1 .