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US-12627366-B2 - Recovery mechanism for secondary cell

US12627366B2US 12627366 B2US12627366 B2US 12627366B2US-12627366-B2

Abstract

Aspects of the present disclosure relate to wireless communications, and more particularly, to cell recovery techniques. One example method generally includes receiving, on a first cell, an indication that one or more channel measurements are to be reported for a second cell for which beam failure is detected; transmitting a first message triggering reporting of at least one preferred beam for communicating on the second cell, the first cell being different from the second cell, wherein the first message is transmitted in response to the indication that the one or more channel measurements are to be reported; receiving a report indicating the at least one preferred beam; and configuring a transmission configuration state in accordance with the at least one preferred beam for communicating on the second cell.

Inventors

  • Kiran Venugopal
  • Jung Ho Ryu
  • Makesh Pravin JOHN WILSON
  • Tao Luo

Assignees

  • QUALCOMM INCORPORATED

Dates

Publication Date
20260512
Application Date
20240422

Claims (20)

  1. 1 . An apparatus for wireless communication at a communications device, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to cause the communications device to: receive at least one pilot signal via a secondary cell; detect a beam failure with respect to the secondary cell; transmit, via a primary cell, an indication that one or more channel measurements are to be reported based on the detection; receive, via the primary cell in response to the indication that the one or more channel measurements are to be reported, a first message that triggers reporting of at least one preferred beam for communication via the secondary cell; determine the at least one preferred beam based on the at least one pilot signal; transmit, via the primary cell, a report that indicates the at least one preferred beam; receive a second message via the primary cell that confirms activation of a transmission configuration state; and communicate via the secondary cell and via the at least one preferred beam in accordance with the activation of the transmission configuration state.
  2. 2 . The apparatus of claim 1 , wherein the one or more processors are configured to cause the communications device to receive the second message via a control resource set of the primary cell.
  3. 3 . The apparatus of claim 1 , wherein the second message comprises a medium access control (MAC) control element (CE) that indicates the confirmation of the transmission configuration state.
  4. 4 . The apparatus of claim 1 , wherein, to communicate via the secondary cell and via the at least one preferred beam, the one or more processors are configured to cause the communications device to communicate data via the secondary cell and via the at least one preferred beam in accordance with the transmission configuration state.
  5. 5 . The apparatus of claim 1 , wherein the one or more processors are configured to cause the communications device to transmit the report that indicates the at least one preferred beam via a medium access control (MAC) control element (CE).
  6. 6 . The apparatus of claim 1 , wherein: the report that indicates the at least one preferred beam includes a beam index associated with the at least one preferred beam; and the one or more processors are configured to cause the communications device to transmit the report via a medium access control (MAC) control element (CE).
  7. 7 . The apparatus of claim 1 , wherein: the at least one preferred beam includes a plurality of preferred beams; the report that indicates the at least one preferred beam includes a plurality of beam indices associated with the plurality of preferred beams; and the one or more processors are configured to cause the communications device to transmit the report via a medium access control (MAC) control element (CE).
  8. 8 . The apparatus of claim 1 , wherein the first message comprises a physical downlink control channel (PDCCH).
  9. 9 . The apparatus of claim 1 , wherein the first message comprises downlink control information (DCI) that includes one or more bits that indicate to the communications device to report the at least one preferred beam.
  10. 10 . The apparatus of claim 1 , wherein the second message comprises a physical downlink control channel (PDCCH) that is scrambled with a cell-radio network temporary identifier (C-RNTI) associated with the secondary cell.
  11. 11 . The apparatus of claim 1 , wherein the second message further confirms reconfiguration of the transmission configuration state.
  12. 12 . An apparatus for wireless communication at a communications device, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to cause the communications device to: receive, via a primary cell from a user equipment (UE), an indication that one or more channel measurements are to be reported for a secondary cell for which beam failure is detected; transmit, via the primary cell in response to the indication that the one or more channel measurements are to be reported, a first message that triggers reporting by the UE of at least one preferred beam for communication via the secondary cell; receive, from the UE via the primary cell, a report that indicates the at least one preferred beam; and configure a transmission configuration state in accordance with the at least one preferred beam for communication via the secondary cell with the UE, wherein, to configure the transmission configuration state, the one or more processors are configured to cause the communications device to transmit a second message via the primary cell that confirms activation of the transmission configuration state.
  13. 13 . The apparatus of claim 12 , wherein the one or more processors are configured to cause the communications device to transmit the second message via a control resource set of the primary cell.
  14. 14 . The apparatus of claim 12 , wherein the second message comprises a medium access control (MAC) control element (CE) that indicates the confirmation of the transmission configuration state.
  15. 15 . The apparatus of claim 12 , wherein the one or more processors are further configured to cause the communications device to communicate data via the secondary cell and via the at least one preferred beam in accordance with the transmission configuration state.
  16. 16 . The apparatus of claim 12 , wherein the one or more processors are configured to cause the communications device to receive the report that indicates the at least one preferred beam via a medium access control (MAC) control element (CE).
  17. 17 . The apparatus of claim 12 , wherein: the report that indicates the at least one preferred beam includes a beam index associated with the at least one preferred beam; and the one or more processors are configured to cause the communications device to receive the report via a medium access control (MAC) control element (CE).
  18. 18 . The apparatus of claim 12 , wherein: the at least one preferred beam includes a plurality of preferred beams; the report that indicates the at least one preferred beam includes a plurality of beam indices associated with the plurality of preferred beams; and the one or more processors are configured to cause the communications device to receive the report via a medium access control (MAC) control element (CE).
  19. 19 . The apparatus of claim 12 , wherein the first message comprises a physical downlink control channel (PDCCH).
  20. 20 . The apparatus of claim 12 , wherein the first message comprises downlink control information (DCI) that includes one or more bits that indicate to the communications device to report the at least one preferred beam.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application for Patent is a continuation of U.S. patent application Ser. No. 18/066,588, filed on Dec. 15, 2022, entitled “RECOVERY MECHANISM FOR SECONDARY CELL” (issued on Jul. 2, 2024, as U.S. Pat. No. 12,028,148), which is a continuation of U.S. patent application Ser. No. 17/327,094, filed on May 21, 2021, entitled “RECOVERY MECHANISM FOR SECONDARY CELL” (issued on Jan. 10, 2023, as U.S. U.S. Pat. No. 11,552,694), which is a continuation of U.S. patent application Ser. No. 16/727,678, filed on Dec. 26, 2019, entitled “RECOVERY MECHANISM FOR SECONDARY CELL” issued on May 25, 2021, as U.S. Pat. No. 11,018,750), which claims benefit of U.S. Provisional Patent Application Ser. No. 62/787,937, filed on Jan. 3, 2019, entitled “RECOVERY MECHANISM FOR SECONDARY CELL,” all of which are assigned to the assignee hereof, and expressly incorporated herein by reference in their entireties. INTRODUCTION Aspects of the present disclosure relate to wireless communications, and more particularly, to cell recovery techniques. 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), transmission reception point (TRP), etc.). A BS or DU may communicate with a set of UEs on downlink channels (e.g., for transmissions from a BS or DU to a UE) and uplink channels (e.g., for transmissions from a UE to 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. NR (e.g., new radio or 5G) is an example of an emerging telecommunication standard. NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR 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 downlink (DL) and on the uplink (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. BRIEF 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. Certain aspects provide a method for wireless communication by method for wireless communication. The method generally includes receiving, at a user-equipment (UE