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EP-4078879-B1 - FAST BEAM UPDATE IN A GROUP OF COMPONENT CARRIERS VIA DOWNLINK CONTROL INFORMATION

EP4078879B1EP 4078879 B1EP4078879 B1EP 4078879B1EP-4078879-B1

Inventors

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

Dates

Publication Date
20260506
Application Date
20201212

Claims (15)

  1. A method (800) for wireless communications by a user equipment, UE, comprising: receiving (802), from a network entity, a downlink control information, DCI, associated with an update for at least one of a beam update or a path loss, PL, reference signal, RS, activation command; and applying (804) the update, based on the received DCI, across at least one of a group of component carriers, CCs, or bandwidth parts, BWPs, within the group of CCs.
  2. The method of claim 1, further comprising: receiving radio resource control, RRC, signaling of multiple lists of CCs; and determining which list of CCs to apply the update across based on an indication in the DCI or based on a CC in which the DCI is received.
  3. The method of claim 2, further comprising either one of: wherein the lists of CCs are non-overlapping; or wherein the lists of CCs for at least two of the following are independently configured: uplink transmission configuration information, TCI, state activation across multiple CCs or BWPs; downlink TCI state activation across multiple CCs or BWPs; or spatial information activation across multiple CCs or BWPs.
  4. The method of claim 1, wherein the DCI indicates the update via a transmission configuration information, TCI, state activation command for at least one of a physical downlink control channel, PDCCH, physical downlink shared channel, PDSCH, or channel state information reference signal, CSI-RS.
  5. The method of claim 4, further comprising at least one of: activating a same set of one or more TCI state IDs for PDSCH, based on the TCI state activation command, for BWPs in a set of CCs indicated via radio resource control, RRC, signaling; activating a same set of one or more TCI state IDs for at least one control resource set, CORESET, the UE monitors for PDCCH, based on the TCI state activation command, for BWPs in a set of CCs indicated via RRC signaling; or activating spatial relation information for at least one CSI-RS resource, based on the TCI state activation command, for BWPs in a set of CCs indicated via RRC signaling.
  6. The method of claim 4, further comprising: receiving radio resource control, RRC, signaling of multiple lists of CCs; and determining which list of CCs to apply the TCI state activation command across based on an indication in the DCI or based on a CC in which the DCI is received.
  7. The method of claim 1, wherein the DCI indicates the update via a spatial relation or uplink transmission configuration information, TCI, state activation command for at least one of a physical uplink control channel, PUCCH, a physical uplink shared channel, PUSCH, sounding reference signal, SRS, or a physical random access channel, PRACH.
  8. The method of claim 7, further comprising at least one of: activating spatial relation information for at least one of PUCCH or SRS, based on the TCI state activation command, for BWPs in a set of CCs indicated via radio resource control, RRC, signaling; or activating a same set of one or more uplink TCI state IDs for at least one of PUCCH, SRS, PUSCH, or PRACH resource, based on the TCI state activation command, for BWPs in a set of CCs indicated via radio resource control, RRC, signaling.
  9. The method of claim 1, wherein the DCI indicates the update via the PL RS activation command and further comprising at least one of: applying a PL RS to at least one sounding reference signal, SRS, resource set, based on the PL RS activation command, for BWPs in a set of CCs indicated via radio resource control, RRC, signaling; applying a PL RS for power control for a PUSCH associated with at least one sounding reference signal, SRS, resource indicator, SRI, based on the PL RS activation command, for BWPs in a set of CCs indicated via RRC signaling; or applying a PL RS to at least one PUCCH resource, based on the PL RS activation command, for BWPs in a set of CCs indicated via radio resource control, RRC, signaling.
  10. The method of claim 1, further comprising either one of: wherein: the DCI is received in a CC of a first cell group, CG; the update is to be applied to CCs of a second CG; and the first and second CGs are different; or wherein: the update is provided via a wake up signal, WUS; and the UE is configured to apply the update in one or more ON durations after the WUS
  11. The method of claim 1, further comprising sending an acknowledgment of the update, wherein the DCI is received in a first CC and the acknowledgment is sent in a second CC.
  12. The method of claim 1, further comprising: sending signaling, to the network entity, indicating capability of the UE to support the update for the at least one of the beam update or the PL RS activation command across at least one of a group of component carriers, CCs, or bandwidth parts, BWPs, within the group of CCs; and receiving signaling, from the network entity, indicating enablement of one or more of the updates, wherein the enablement is signaled via at least one of radio resource control, RRC, signaling, media access control, MAC, control element, CE, or a downlink control information, DCI.
  13. A method (900) for wireless communications by a network entity, comprising: transmitting (902), to a user equipment, UE, a downlink control information, DCI, associated with an update for at least one of a beam update or a path loss, PL, reference signal, RS, activation command; and processing (904) transmissions from the UE, based on the UE applying the update, based on receiving the DCI, across at least one of a group of component carriers, CCs, or bandwidth parts, BWPs, within the group of CCs.
  14. An apparatus (1002) for wireless communications by a user equipment, UE, (1000) comprising: at least one processor (1004) configured to: receive, from a network entity, a downlink control information, DCI, associated with an update for at least one of a beam update or a path loss, PL, reference signal, RS, activation command; and apply the update, based on the received DCI, across at least one of a group of component carriers, CCs, or bandwidth parts, BWPs, within the group of CCs; and a memory (1012) coupled with the at least one processor.
  15. An apparatus (1102) for wireless communications by a network entity (1100), comprising: at least one processor (1104) configured to: transmit, to a user equipment, UE, a downlink control information, DCI, associated with an update for at least one of a beam update or a path loss, PL, reference signal, RS, activation command; and process transmissions from the UE, based on the UE applying the update, based on receiving the DCI, across at least one of a group of component carriers, CCs, or bandwidth parts, BWPs, within the group of CCs; and a memory (1112) coupled with the at least one processor.

Description

Field The present disclosure relates generally to communication systems, and more particularly, to methods and apparatus for updating beam information across a plurality of component carriers (CCs) via downlink control information (DCI). Background Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical 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). Examples of such multiple-access technologies include Long Term Evolution (LTE) 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. In some examples, a wireless multiple-access communication system may include a number of base stations, each simultaneously supporting communication for multiple communication devices, otherwise known as user equipment (UEs). In 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 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 distributed units, in communication with a central unit, may define an access node (e.g., a new radio base station (NR BS), a new radio node-B (NR NB), a network node, 5G NB, eNB, Next Generation Node B (gNB), etc.). A base station or DU may communicate with a set of UEs on downlink channels (e.g., for transmissions from a base station or to a UE) and uplink channels (e.g., for transmissions from a UE to a base station or distributed unit). 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. An example of an emerging telecommunication standard is new radio (NR), for example, 5G radio access. NR is a set of enhancements to the LTE mobile standard promulgated by Third Generation Partnership Project (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 downlink (DL) and on the uplink (UL) as well as support 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 desire for further improvements in NR technology. Preferably, these improvements should be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. WO 2019/223634 discloses an information processing method and apparatus, a terminal, and a communication device. The method comprises: on the basis of the detection on a reported trigger event, determining whether to report an event-based beam report and/or an event-based channel state information (CSI) report to a network side device. HUAWEI ET AL: "Enhancements on multi-beam operation", 3GPP DRAFT; Rl-1908067, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE; 650, ROUTE DES LUCIOLES; F-06921 SOPHIA-ANTIPOLIS CEDEX; FRANCE, vol. RAN WG1, no. Prague, Czech Republic; 20190826 - 20190830; 17 August 2019 (2019-08-17) discusses multi-beam enhancements on the following areas: latency/overhead reduction, panel-based beam selection, L1-SINR and SCell BFR. NTT DOCOMO ET AL: "Discussion on multi-beam enhancement", 3GPP DRAFT; Rl-1911185, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE; 650, ROUTE DES LUCI0LES; F-06921 SOPHIA-ANTIPOLIS CEDEX; FRANCE; vol. RAN WG1, 20191014 - 20191020 4 October 2019 (2019-10-04) discusses enhancements on multi-beam operation in Rel-16, including low latency and overhead beam selection, beam failure recovery for SCell, and beam measurement and reporting of L1-SINR. BRIEF SUMMARY The invention is defined by the appended independent claims. Embodiments are defined by the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS So that the manner in which the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by refer