US-20260129656-A1 - MULTI-CELL AND MULTI-SHARED CHANNEL COMMUNICATIONS

US20260129656A1US 20260129656 A1US20260129656 A1US 20260129656A1US-20260129656-A1

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) receive a downlink control information (DCI) message that schedules multiple shared channel communication across multiple cells. The DCI message may include one or more fields that are applicable to the shared channel communications, and the field may have a maximum quantity of bits that is based on a maximum quantity of scheduled shared channel communications associated with the multiple cells. The UE may communicate the shared channel communications via respective cells in accordance with one or more respective bits of the field. The UE may transmit one or more feedback messages associated with the shared channel communications in accordance with an offset from a last symbol of a final communication based on the DCI that scheduled the shared channel communications across multiple cells.

Inventors

Javier Rodriguez Fernandez
Kazuki Takeda

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260507
Application Date: 20251103

Claims (20)

1 . An apparatus for wireless communication at a user equipment (UE), comprising: one or more memories; and one or more processors coupled with the one or more memories and configured to cause the UE to: receive a downlink control information message that schedules a plurality of downlink messages across a plurality of cells, wherein the plurality of downlink messages includes at least a first downlink message via a first cell, a second downlink message via a second cell, and a third downlink message via the first cell, and wherein a last symbol of the third downlink message occurs after the first downlink message and the second downlink message in a time domain; generate one or more bits for a first feedback message in accordance with a sub-codebook of a plurality of sub-codebooks that is associated with the plurality of downlink messages across the plurality of cells, wherein the one or more bits are ordered by starting reception time among downlink messages received via the first cell, first, and by cell index of the plurality of cells, second; and transmit the first feedback message associated with the first downlink message in accordance with an offset from the last symbol of the third downlink message based at least in part on reception of the downlink control information message that scheduled the plurality of downlink messages across the plurality of cells that includes the first cell and the second cell and with at least one cell having a plurality of scheduled downlink messages, wherein the transmission of the first feedback message is based at least in part on the generation of the one or more bits.
2 . The apparatus of claim 1 , wherein the first downlink message is associated with a first processing time that terminates prior to the offset and the second downlink message is associated with a second processing time that terminates after the offset, and the one or more processors are configured to cause the UE to: transmit, via the first feedback message, one or more acknowledgment (ACK) bits based at least in part on the first processing time; and transmit, via a second feedback message associated with the second downlink message, one or more not-acknowledgment (NACK) bits based at least in part on the second processing time.
3 . The apparatus of claim 1 , wherein at least one downlink message of the plurality of downlink messages is associated with a processing time that terminates after the offset, and the one or more processors are configured to cause the UE to: transmit, via at least the first feedback message, one or more not acknowledgment (NACK) bits based at least in part on the processing time of the at least one downlink message.
4 . The apparatus of claim 1 , wherein the one or more processors are configured to cause the UE to: receive a second downlink control information message that schedules a second plurality of downlink messages that includes at least a fourth downlink message via the first cell, a fifth downlink message via the second cell, and a sixth downlink message via the first cell, wherein at least one downlink message of the second plurality of downlink messages is associated with a processing time that terminates after a second offset from a last symbol of the second plurality of downlink messages; and refrain from transmission of a feedback message associated with the fourth downlink message, the fifth downlink message, and the sixth downlink message based at least in part on the processing time of the at least one downlink message.
5 . The apparatus of claim 1 , wherein the one or more processors are configured to cause the UE to: generate one or more bits for the first feedback message in accordance with a set of time domain resource allocations, wherein the set of time domain resource allocations includes one or more entries that are associated with each downlink message of the plurality of downlink messages across the plurality of cells, and wherein the transmission of the first feedback message is based at least in part on the generation of the one or more bits.
6 . The apparatus of claim 1 , wherein the one or more processors are configured to cause the UE to: receive, via an antenna array of the UE, a second downlink control information message within a same monitoring occasion as the downlink control information message, wherein the second downlink control information message schedules a second plurality of downlink messages that includes at least a fourth downlink message via the first cell, the second cell, or a third cell; and transmit a second feedback message associated with the fourth downlink message, wherein the first feedback message is transmitted prior to the second feedback message based at least in part on the downlink control information message and the second downlink control information message.
7 . The apparatus of claim 6 , wherein: the first feedback message is transmitted prior to the second feedback message based at least in part on an order of the downlink control information message and the second downlink control information message; and the order is based at least in part on an aggregation level, a search space index, a control resource set index, a control channel element index, or any combination thereof.
8 . The apparatus of claim 6 , wherein the first feedback message is transmitted prior to the second feedback message based at least in part on a first reception start time of the first downlink message that occurs prior to a second reception start time of the fourth downlink message.
9 . The apparatus of claim 1 , wherein: the plurality of downlink messages includes a fourth downlink message that has a last symbol that occurs at a same time as the last symbol of the third downlink message in the time domain, the third downlink message is associated with a first processing time that is greater than a second processing time associated with the fourth downlink message, and the first feedback message is transmitted based at least in part on the first processing time that is greater than the second processing time.
10 . An apparatus for wireless communication at a user equipment (UE), comprising: one or more memories; and one or more processors coupled with the one or more memories and configured to cause the UE to: receive a downlink control information message that schedules at least a first shared channel communication via a first cell, a second shared channel communication via a second cell, and a third shared channel communication via the first cell, wherein the downlink control information message includes a field that is applicable to the first shared channel communication, the second shared channel communication, and the third shared channel communication, and wherein the field has a maximum quantity of bits that is based at least in part on a maximum quantity of scheduled shared channel communications associated with at least the first cell and the second cell; communicate the first shared channel communication via the first cell in accordance with one or more first bits of the field associated with the first cell; communicate the second shared channel communication via the second cell in accordance with one or more second bits of the field associated with the second cell; and communicate the third shared channel communication via the first cell in accordance with one or more third bits of the field associated with the first cell.
11 . The apparatus of claim 10 , wherein: the field comprises a new data indicator field; and the maximum quantity of bits is selected for the new data indicator field based at least in part on the maximum quantity of scheduled shared channel communications.
12 . The apparatus of claim 10 , wherein the one or more processors are configured to cause the UE to: receive, via an antenna array of the UE, an indication of a quantity of cells that have scheduled shared channel communications with the UE, wherein an association between each bit of the field and a respective shared channel communication is based at least in part on the quantity of cells.
13 . The apparatus of claim 10 , wherein the field comprises a redundancy version field, and the one or more processors are configured to cause the UE to: receive an indication of a quantity of bits associated with the field, wherein the maximum quantity of bits is selected for the field based at least in part on the maximum quantity of scheduled shared channel communications and on the quantity of bits.
14 . The apparatus of claim 13 , wherein: the redundancy version field comprises a plurality of blocks of bits; each block of bits of the plurality of blocks of bits is associated with a respective shared channel communication and has a respective quantity of bits; and the indication of the quantity of bits comprises each respective quantity of bits for each shared channel communication of each cell.
15 . The apparatus of claim 10 , wherein the one or more processors are configured to cause the UE to: receive, via the downlink control information message, a second field applicable to the first shared channel communication, the second shared channel communication, and the third shared channel communication, wherein the second field comprises information associated with frequency domain resource allocation, a modulation and coding scheme, or both.
16 . An apparatus for wireless communication at a network entity, comprising: one or more memories; and one or more processors coupled with the one or more memories and configured to cause the network entity to: output a downlink control information message that schedules a plurality of downlink messages across a plurality of cells, wherein the plurality of downlink messages includes at least a first downlink message via a first cell, a second downlink message via a second cell, and a third downlink message via the first cell, and wherein a last symbol of the third downlink message occurs after the first downlink message and the second downlink message in a time domain; and obtain a first feedback message associated with the first downlink message in accordance with an offset from the last symbol of the third downlink message based at least in part on reception of the downlink control information message that scheduled the plurality of downlink messages across the plurality of cells that includes the first cell and the second cell and with at least one cell having a plurality of scheduled downlink messages, wherein the first feedback message includes one or more bits in accordance with a sub-codebook of a plurality of sub-codebooks that is associated with the plurality of downlink messages across the plurality of cells, wherein the one or more bits are ordered by starting reception time among downlink messages transmitted via the first cell, first, and by cell index of the plurality of cells, second.
17 . The apparatus of claim 16 , wherein the first downlink message is associated with a first processing time that terminates prior to the offset and the second downlink message is associated with a second processing time that terminates after the offset, and the one or more processors are configured to cause the network entity to: obtain, via the first feedback message, one or more acknowledgment (ACK) bits based at least in part on the first processing time; and obtain, via a second feedback message associated with the second downlink message, one or more not-acknowledgment (NACK) bits based at least in part on the second processing time.
18 . The apparatus of claim 16 , wherein at least one downlink message of the plurality of downlink messages is associated with a processing time that terminates after the offset, and the one or more processors are configured to cause the network entity to: obtain, via at least the first feedback message, one or more not acknowledgment (NACK) bits based at least in part on the processing time of the at least one downlink message.
19 . The apparatus of claim 16 , wherein the one or more processors are configured to cause the network entity to: output a second downlink control information message that schedules a second plurality of downlink messages that includes at least a fourth downlink message via the first cell, a fifth downlink message via the second cell, and a sixth downlink message via the first cell, wherein at least one downlink message of the second plurality of downlink messages is associated with a processing time that terminates after a second offset from a last symbol of the second plurality of downlink messages; and refrain from monitoring for a feedback message associated with the fourth downlink message, the fifth downlink message, and the sixth downlink message based at least in part on the processing time of the at least one downlink message.
20 . The apparatus of claim 16 , wherein: the one or more bits of the first feedback message are obtained in accordance with a set of time domain resource allocations, and the set of time domain resource allocations includes one or more entries that are associated with each downlink message of the plurality of downlink messages across the plurality of cells.

Description

CROSS REFERENCES The present Application for Patent claims benefit of U.S. Provisional Patent Application No. 63/717,776 by RODRIGUEZ FERNANDEZ et al., entitled “MULTI-CELL AND MULTI-SHARED CHANNEL COMMUNICATIONS,” filed Nov. 7, 2024, assigned to the assignee hereof, and expressly incorporated by reference herein. INTRODUCTION The following relates to wireless communications, including managing multiple shared channel communications across multiple cells. Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE). SUMMARY The systems, methods, and devices of this disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein. A method for wireless communication by a user equipment (UE) is described. The method may include receiving a downlink control information message that schedules a set of multiple downlink messages across a set of multiple cells, where the set of multiple downlink messages includes at least a first downlink message via a first cell, a second downlink message via a second cell, and a third downlink message via the first cell, and where a last symbol of the third downlink message occurs after the first downlink message and the second downlink message in a time domain, generating one or more bits for a first feedback message in accordance with a sub-codebook of a set of multiple sub-codebooks that is associated with the set of multiple downlink messages across the set of multiple cells, where the one or more bits are ordered by starting reception time among downlink messages received via the first cell, first, and by cell index of the set of multiple cells, second, and transmitting the first feedback message associated with the first downlink message in accordance with an offset from the last symbol of the third downlink message based on reception of the downlink control information message that scheduled the set of multiple downlink messages across the set of multiple cells that includes the first cell and the second cell and with at least one cell having a set of multiple scheduled downlink messages, where the transmission of the first feedback message is based on the generation of the one or more bits. An apparatus for wireless communication at a UE is described. The apparatus may include one or more memories, and one or more processors coupled with the one or more memories. The one or more processors may be configured to cause the UE to receive a downlink control information message that schedules a set of multiple downlink messages across a set of multiple cells, where the set of multiple downlink messages includes at least a first downlink message via a first cell, a second downlink message via a second cell, and a third downlink message via the first cell, and where a last symbol of the third downlink message occurs after the first downlink message and the second downlink message in a time domain, generate one or more bits for a first feedback message in accordance with a sub-codebook of a set of multiple sub-codebooks that is associated with the set of multiple downlink messages across the set of multiple cells, where the one or more bits are ordered by starting reception time among downlink messages received via the first cell, first, and by cell index of the set of multiple cells, second, and transmit the first feedback message associated with the first downlink message in accordance with an offset from the last symbol of the third downlink message based on reception of the downlink control information message that scheduled the set of multiple downlink messages across the set of multiple cells that includes the first cell and the second cell and with at least one cell having a set of multiple scheduled downlink messages, where the transmission of the first feedback message is based on the generation of the one or more bits. Another apparatus for wireless communication at a UE is described. The apparatus may include