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EP-4742779-A2 - RULES FOR DETERMINING AN APPLICATION TIME FOR A DOWNLINK CONTROL INFORMATION (DCI) BASED UPDATE

EP4742779A2EP 4742779 A2EP4742779 A2EP 4742779A2EP-4742779-A2

Abstract

Certain aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for determining when to apply downlink control information (DCI)-based updates. A method that may be performed by a user equipment (UE) includes receiving a downlink control information (DCI) indicating an update to be applied to at least one of an uplink (UL) transmission or a downlink (DL) transmission, determining an application time for applying the update based, at least in part, on a slot where an acknowledgement (ACK) was transmitted, and applying the update in accordance with the determined application time.

Inventors

  • BAI, Tianyang
  • ZHOU, YAN
  • LI, JUNYI
  • LUO, TAO

Assignees

  • QUALCOMM Incorporated

Dates

Publication Date
20260513
Application Date
20211222

Claims (15)

  1. An apparatus for wireless communication, comprising: memory; and one or more processors coupled to the memory, the one or more processors being configured, individually or collectively, to: receive a downlink control information, DCI, indicating an update to be applied to at least one of an uplink, UL, transmission or a downlink, DL, transmission, wherein the update comprises an update to at least one of an UL power control, PC, parameter or a path loss, PL, reference signal, RS, used when calculating transmit power for one or more UL transmissions; determine an application time for applying the update based, at least in part, on a slot where an acknowledgement, ACK, was transmitted; and apply the update in accordance with the determined application time.
  2. The apparatus of claim 1, wherein the update comprises an update to a transmission configuration indicator, TCI, state.
  3. The apparatus of claim 1, wherein the one or more processors are configured, individually or collectively, to determine the application time for applying the update based, at least in part, on the slot where the ACK was transmitted by determining the application time as a function of a time delay relative to the slot where the ACK was transmitted; preferably, wherein the time delay is based, at least in part, on a capability of the apparatus.
  4. The apparatus of claim 1, wherein the ACK comprises a non-dedicated ACK transmitted in response to a DL transmission scheduled by the DCI, when the DCI has a DL DCI format; or the apparatus of claim 1, wherein the ACK comprises a non-dedicated ACK transmitted as an UL transmission scheduled by the DCI, when the DCI has a UL DCI format; or the apparatus of claim 1, wherein: the ACK is conveyed via a dedicated ACK bit in an uplink control information, UCI, when the DCI does not schedule a transmission; and the dedicated ACK bit is transmitted a period of time after an end of a physical downlink control channel, PDCCH, carrying the DCI; preferably wherein the period of time is based, at least in part, on a subcarrier spacing, SCS, associated with a first component carrier, CC, on which the DCI was received and a second CC on which the ACK was transmitted.
  5. The apparatus of claim 1, wherein the one or more processors are configured, individually or collectively, to determine the application time for applying the update based, at least in part, on the slot where the ACK was transmitted by determining the application time as a later time among a first time and a second time, wherein: the first time is determined as a function of a first time delay relative to a slot in which the DCI was received; and the second time is determined as a function of a second time delay relative to the slot where the ACK was transmitted; preferably, wherein the first time delay is: configured by a network entity; or based, at least in part, on a capability of the apparatus; more preferably, wherein the second time delay is: zero; based, at least in part, on a capability of the apparatus; or based, at least in part, on a configuration of a network entity.
  6. The apparatus of claim 1, wherein the one or more processors are further configured, individually or collectively, to select to: determine the application time as a function of a time delay relative to the slot where the ACK was transmitted; or determine the application time as a later time among a first time and a second time, wherein the first time is determined as a function of a first time delay relative to a slot in which the DCI was received and the second time is determined as a function of a second time delay relative to the slot where the ACK was transmitted; and determine the application time in accordance with the selection; preferably, wherein the selection is based, at least in part, on at least one of: signaling from a network entity; whether the ACK comprises a non-dedicated ACK or a dedicated ACK; a format of the DCI; and a subcarrier spacing, SCS, associated with a first component carrier, CC, on which the DCI was received and a second CC on which the update is to be applied; more preferably, wherein the one or more processors are further configured, individually or collectively, to transmit an indication of a capability of the apparatus to support selection of at least one of: determining the application time as the function of the time delay relative to the slot where the ACK was transmitted; and determining the application time as the later time among the first time and the second time, wherein the first time is determined as the function of the first time delay relative to the slot in which the DCI was received and the second time is determined as the function of the second time delay relative to the slot where the ACK was transmitted.
  7. An apparatus for wireless communication, comprising: memory; and one or more processors coupled to the memory, the one or more processors being configured, individually or collectively, to: transmit, to a user equipment, UE,, a downlink control information, DCI, indicating an update to be applied to at least one of an uplink, UL, transmission or a downlink, DL, transmission, wherein the update comprises an update to at least one of an UL power control, PC, parameter or a path loss, PL, reference signal, RS, used when calculating transmit power for one or more UL transmissions; receive an indication of a capability of the UE; determine an application time for applying the update based, at least in part, on a slot where an acknowledgement, ACK, was received; and apply the update in accordance with the determined application time.
  8. The apparatus of claim 7, wherein the update comprises an update to a transmission configuration indicator, TCI, state.
  9. The apparatus of claim 7, wherein the one or more processors are configured, individually or collectively, to determine the application time for applying the update based, at least in part, on the slot where the ACK was received by determining the application time as a function of a time delay relative to the slot where the ACK was received.
  10. The apparatus of claim 9, wherein the one or more processors are further configured, individually or collectively, to: receive an indication of a capability of the UE, wherein the time delay is based, at least in part, on the capability of the UE.
  11. The apparatus of claim 9, wherein the ACK comprises a non-dedicated ACK received in response to a DL transmission scheduled by the DCI, when the DCI has a DL DCI format; or the apparatus of claim 9, wherein the ACK comprises a non-dedicated ACK received as an UL transmission scheduled by the DCI, when the DCI has a UL DCI format; or the apparatus of claim 9, wherein: the ACK is received via a dedicated ACK bit in an uplink control information, UCI, when the DCI does not schedule a transmission; and the dedicated ACK bit is received a period of time after an end of a physical downlink control channel, PDCCH, carrying the DCI; preferably, wherein the period of time is based, at least in part, on a subcarrier spacing, SCS, associated with a first component carrier, CC, on which the DCI was transmitted and a second CC on which the ACK was received.
  12. The apparatus of claim 10, wherein the one or more processors are configured, individually or collectively, to determine the application time for applying the update based, at least in part, on the slot where the ACK was received by determining the application time as a later time among a first time and a second time, wherein: the first time is determined as a function of a first time delay relative to a slot in which the DCI was transmitted; and the second time is determined as a function of a second time delay relative to the slot where the acknowledgement, ACK, was received: preferably, wherein the one or more processors are further configured, individually or collectively, to: configure the first time delay; or preferably, wherein the first time delay is based, at least in part, on a capability of the UE; or preferably, wherein the second time delay is: zero; based, at least in part, on a capability of the UE; or based, at least in part, on a configuration of a network entity.
  13. A method for wireless communication by a user equipment, UE,, comprising: receiving a downlink control information, DCI, indicating an update to be applied to at least one of an uplink, UL, transmission or a downlink, DL, transmission, wherein the update comprises an update to at least one of an UL power control, PC, parameter or a path loss, PL, reference signal, RS, used when calculating transmit power for one or more UL transmissions; determining an application time for applying the update based, at least in part, on a slot where an acknowledgement, ACK, was transmitted; and applying the update in accordance with the determined application time.
  14. A method for wireless communication by a network entity, comprising: transmitting, to a user equipment, UE,, a downlink control information, DCI, indicating an update to be applied to at least one of an uplink, UL, transmission or a downlink, DL, transmission, wherein the update comprises an update to at least one of an UL power control, PC, parameter or a path loss, PL, reference signal, RS, used when calculating transmit power for one or more UL transmissions; determining an application time for applying the update based, at least in part, on a slot where an acknowledgement, ACK, was received; and applying the update in accordance with the determined application time.
  15. A computer program comprising instructions which when executed by a computer cause the computer to perform the method of claim 13 or 14.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims priority to U.S. Application No. 17/557,881, filed December 21, 2021, which claims benefit of and priority to U.S. Provisional Application No. 63/140,905, filed January 24, 2021 which are hereby assigned to the assignee hereof and hereby expressly incorporated by reference herein in their entireties as if fully set forth below and for all applicable purposes. BACKGROUND Field of the Disclosure Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for processing downlink control information (DCI)-based updates. Description of Related Art Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE Advanced (LTE-A) systems, code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems, to name a few. In some examples, a wireless multiple-access communication system may include a number of base stations (BSs), which are each capable of simultaneously supporting communication for multiple communication devices, otherwise known as user equipments (UEs). In an LTE or LTE-A network, a set of one or more base stations may define an eNodeB (eNB). In other examples (e.g., in a next generation, a new radio (NR), or 5G network), a wireless multiple access communication system may include a number of distributed units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs), transmission reception points (TRPs), etc.) in communication with a number of central units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), where a set of one or more DUs, in communication with a CU, may define an access node (e.g., which may be referred to as a BS, 5G NB, next generation NodeB (gNB or gNodeB), TRP, etc.. A BS or DU may communicate with a set of UEs on downlink (DL) channels (e.g., for transmissions from a BS or to a UE) and uplink (UL) channels (e.g., for transmissions from a UE to a BS or DU). These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. New Radio (NR) (e.g., 5G) is an example of an emerging telecommunication standard. NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP. It is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using OFDMA with a cyclic prefix (CP) on the DL and on the UL. To these ends, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to increase, there exists a need for further improvements in NR and LTE technology. Preferably, these improvements should be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. SUMMARY The systems, methods, and devices of the disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of this disclosure as expressed by the claims which follow, some features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled "Detailed Description" one will understand how the features of this disclosure provide advantages that include improved communications between access points and stations in a wireless network. One or more aspects of the subject matter described in this disclosure can be implemented in a method for wireless communications by a user equipment (UE). The method generally includes receiving a downlink control information (DCI) indicating an update to be applied to at least one of an uplink (UL) transmission or a downlink (DL) transmission; determining an application time for applying the update based, at least in part, on one or more rules; and applying the update in accordance with the determined application time. One or more aspects of the subject matter described in this disclosure can be implemented in a m