CN-121986513-A - Techniques for bundling quasi co-sited (QCL) of single downlink control information (S-DCI) for Multiple Transmission Reception Points (MTRPs) with unified Transmission Configuration Indication (TCI) status

Abstract

Aspects described herein relate to receiving, from a network node, a Transmission Configuration (TCI) state configuration indicating a plurality of TCI states, receiving, from the network node, an indication to activate or select a first TCI state and a second TCI state from the plurality of TCI states, and receiving, from the network node, a scheduling Physical Downlink Control Channel (PDCCH) scheduling one or more Physical Downlink Shared Channel (PDSCH) reception occasions, wherein a first quasi co-location (QCL) for at least one of the one or more PDSCH reception occasions is assumed to be non-quasi co-located with a downlink reference signal (DL RS) for at least one of the one or more PDSCH reception occasions. Other aspects relate to transmitting TCI status configuration, indication, and scheduling PDCCHs.

Inventors

• GUO SHAOZHEN
• M. Hoshneyvesan
• ZHANG XIAOXIA
• P. Garr

Assignees

• 高通股份有限公司

Dates

Publication Date

20260505

Application Date

20231019

Claims (20)

1. 1. An apparatus for wireless communication, the apparatus comprising: A transceiver; One or more memories configured to store instructions, either alone or in combination, and One or more processors communicatively coupled with the one or more memories, wherein the one or more processors are configured, alone or in combination, to execute the instructions to cause the apparatus to: receiving a Transmission Configuration Indicator (TCI) state configuration indicating a plurality of TCI states from a network node; receiving an indication from the network node to activate or select a first TCI state and a second TCI state from the plurality of TCI states, and A scheduled Physical Downlink Control Channel (PDCCH) is received from the network node that schedules one or more Physical Downlink Shared Channel (PDSCH) reception occasions, wherein a first quasi co-location (QCL) for at least one of the one or more PDSCH reception occasions is assumed to be non-quasi co-located with a downlink reference signal (DL RS).
2. 2. The apparatus of claim 1, wherein the TCI state configuration indicates that at least one TCI state of the plurality of TCI states is not associated with the DL RS, Wherein the indication comprises a TCI activate command for activating one or more TCI code points, Wherein each of the one or more TCI code points is associated with one or more TCI states from the plurality of TCI states, and Wherein at least one of the one or more TCI code points indicates the first TCI state as being associated with a second QCL hypothesis of the DL RS QCL and indicates the second TCI state as being associated with the first QCL hypothesis.
3. 3. The apparatus of claim 2, wherein the indication further comprises a beam indication, DCI, to indicate one TCI code point from at least one or more TCI code points.
4. 4. The apparatus of claim 2, wherein the TCI activate command indicates an order in which the first TCI state and the second TCI state are activated.
5. 5. The apparatus of claim 2, wherein each TCI state of the plurality of TCI states is a combined uplink and downlink TCI state.
6. 6. The apparatus of claim 2, wherein each TCI state of the plurality of TCI states comprises an uplink TCI state or a downlink TCI state.
7. 7. The apparatus of claim 2, wherein the scheduling PDCCH comprises a TCI state selection field indicating that the first TCI state, the second TCI state, or both the first TCI state and the second TCI state are selected for the one or more PDSCH reception occasions, wherein the TCI state selection field is associated with a plurality of values including a value for indicating each of: selecting the first TCI state for a first subset of the one or more PDSCH reception occasions; the second TCI state is selected for a second subset of the one or more PDSCH reception occasions.
8. 8. The apparatus of claim 1, wherein the scheduling PDCCH comprises a first TCI state selection field related to selecting one or more TCI states associated with a second QCL hypothesis of the DL RS QCL, and a second TCI state selection field in the scheduling PDCCH related to selecting one or more TCI states associated with the first QCL hypothesis.
9. 9. The apparatus of claim 8, wherein a first legacy TCI state selection field in the scheduling PDCCH indicates that the first TCI state is selected for a first subset of the one or more PDSCH reception occasions, and wherein the second TCI state selection field in the scheduling PDCCH indicates that the second TCI state is selected for the second subset of the one or more PDSCH reception occasions.
10. 10. The apparatus of claim 8, wherein a reserved code point of the first TCI state selection field in the scheduling PDCCH indicates that a TCI state associated with the second QCL hypothesis is not selected.
11. 11. The apparatus of claim 8, wherein the one or more processors are configured, alone or in combination, to execute the instructions to cause the apparatus to receive a configuration from the network node indicating that the second TCI state selection field is present in the scheduling PDCCH.
12. 12. The apparatus of claim 1, wherein the scheduling PDCCH comprises a TCI state selection field related to selecting one or more TCI states associated with a second QCL hypothesis of the DL RS QCL, and wherein the one or more processors are configured, alone or in combination, to execute the instructions to cause the apparatus to: In the absence of a configuration indication and selection of a further TCI state selection field related to one or more TCI states associated with the second QCL hypothesis, selecting only a TCI state associated with the second QCL hypothesis among the first TCI state and the second TCI state based at least in part on the device not supporting the TCI state associated with the first QCL hypothesis for the one or more PDSCH reception opportunities.
13. 13. The apparatus of claim 1, wherein the scheduling PDCCH comprises a TCI state selection field related to selecting one or more TCI states associated with a second QCL hypothesis of the DL RS QCL, and wherein the one or more processors are configured, alone or in combination, to execute the instructions to cause the apparatus to: In the event that a configuration indicates and selects that a further TCI state selection field related to one or more TCI states associated with a second QCL hypothesis of the DL RS QCL is not present, selecting, for the one or more PDSCH reception occasions, all TCI states associated with the first QCL hypothesis among the first TCI state and the second TCI state.
14. 14. The apparatus of claim 13, wherein the one or more processors are configured, individually or in combination, to execute the instructions to cause the apparatus to select all TCI states associated with the first QCL hypothesis among the first TCI state and the second TCI state based at least in part on sending a capability indicator indicating that the apparatus supports bundled QCL for a plurality of TCI states associated with the first QCL hypothesis for the one or more PDSCH reception occasions.
15. 15. The apparatus of claim 13, wherein the one or more processors are configured, individually or in combination, to execute the instructions to cause the apparatus to select all TCI states associated with the first QCL hypothesis among the first TCI state and the second TCI state based at least in part on a time offset between receiving the scheduled PDCCH and receiving the first one of the one or more PDSCH reception occasions reaching a threshold time.
16. 16. The apparatus of claim 1, wherein the scheduling PDCCH comprises a TCI state selection field related to selecting one or more TCI states associated with a second QCL hypothesis of the DL RS QCL, and wherein the one or more processors are configured, alone or in combination, to execute the instructions to cause the apparatus to: in the case where a configuration indicates and selects that a further TCI state selection field related to one or more TCI states associated with the first QCL hypothesis does not exist, selecting the first one of the one or more TCI states associated with the first QCL hypothesis from the first TCI state and the second TCI state based at least in part on the apparatus not supporting bundled qcs for the plurality of TCI states associated with the first QCL hypothesis for the one or more PDSCH reception opportunities.
17. 17. The apparatus of claim 1, wherein the TCI state configuration indicates that at least one TCI state of the plurality of TCI states is associated with the first QCL hypothesis and with a group index.
18. 18. The apparatus of claim 17, wherein a reset indicator corresponding to the at least one of the plurality of TCI states associated with the first QCL hypothesis and associated with the group index is included in one of the indication or the scheduling PDCCH.
19. 19. The apparatus of claim 18, wherein the one or more processors are configured, alone or in combination, to execute the instructions to cause the apparatus to reset the QCL for the one or more PDSCH reception occasions associated with the one or more TCI states associated with the group index based on the reset indicator.
20. 20. The device of claim 18, wherein the one or more processors are configured, alone or in combination, to execute the instructions to cause the device to one of: Resetting the QCL for the one or more PDSCH reception occasions associated with the one or more TCI states associated with the group index in the one or more PDSCH reception occasions and future PDSCH reception occasions based on the reset indicator indicating resetting the QCL, or Based on receiving the reset indicator indicating that the QCL is not reset for a second group, a third QCL assumption is applied, i.e., the one or more PDSCH reception occasions associated with the one or more TCI states in the second group are QCL to each other and also to previous PDSCH reception occasions QCL associated with the one or more TCI states in the second group.

Description

Techniques for bundling quasi co-sited (QCL) of single downlink control information (S-DCI) for Multiple Transmission Reception Points (MTRPs) with unified Transmission Configuration Indication (TCI) status Technical Field Aspects of the present disclosure relate generally to wireless communication systems and, more particularly, to configuring and using a Transmit Configuration Indication (TCI) state having a plurality of Transmit Receive Points (TRPs). Description of related Art Wireless communication 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 multiple-access systems 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 Code Division Multiple Access (CDMA) systems, time Division Multiple Access (TDMA) systems, frequency Division Multiple Access (FDMA) systems, and Orthogonal Frequency Division Multiple Access (OFDMA) systems, as well as single carrier frequency division multiple access (SC-FDMA) systems. These multiple access techniques have been employed in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate at the urban, national, regional, and even global levels. For example, fifth generation (5G) wireless communication technologies, which may be referred to as 5G new radio (5G NR), are designed to expand and support diverse usage scenarios and applications for current mobile network campaigns. In one aspect, 5G communication techniques may include enhanced mobile broadband addressing for accessing multimedia content, services, and data in a human-based use case, ultra-reliable low-latency communications (URLLC) with certain specifications of latency and reliability, and large-scale machine-type communications that may allow for the transmission of very large numbers of connected devices and relatively small amounts of non-latency sensitive information. Disclosure of Invention The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. According to an aspect, an apparatus for wireless communication is provided that includes a transceiver, one or more memories configured to store instructions, alone or in combination, and one or more processors communicatively coupled with the one or more memories. The one or more processors are configured to execute instructions, alone or in combination, to cause the apparatus to receive, from a network node, a Transmit Configuration Indicator (TCI) state configuration indicating a plurality of TCI states, receive, from the network node, an indication to activate or select a first TCI state and a second TCI state from the plurality of TCI states, and receive, from the network node, a scheduling Physical Downlink Control Channel (PDCCH) scheduling one or more Physical Downlink Shared Channel (PDSCH) reception occasions, wherein a first quasi co-location (QCL) assumption for at least one of the one or more PDSCH reception occasions is not quasi co-located with a downlink reference signal (DL RS) for the at least one of the one or more PDSCH reception occasions. In another aspect, an apparatus for wireless communication is provided that includes a transceiver, one or more memories configured to store instructions, alone or in combination, and one or more processors communicatively coupled with the one or more memories. The one or more processors are configured, alone or in combination, to execute instructions to cause the apparatus to transmit, for a User Equipment (UE), a TCI state configuration indicating a plurality of TCI states, transmit, for the UE, an indication to activate or select a first TCI state and a second TCI state from the plurality of TCI states, and transmit, for the UE, a scheduling PDCCH to schedule one or more PDSCH reception occasions, wherein a first QCL for at least one of the one or more PDSCH reception occasions is assumed to be not with a DL RS QCL. In another aspect, a method for wireless communication at a UE is provided that includes receiving a TCI state configuration from a network node indicating a plurality of TCI states, receiving an indication from the network node to activate or select a first TCI state and a second TCI state from the plurality of TCI states, and receiving a scheduling PDCCH from the network node to schedule one or more PDSCH reception occasions, wherein a first QCL for at least one of the