Uplink control information for indicating user equipment-initiated beam report
The UCI message in wireless networks allows UEs to request and manage beam resources efficiently, addressing the lack of UE-initiated beam management in legacy systems by ensuring timely resource allocation for beam reports, thereby improving communication efficiency.
Patent Information
- Application Number
- PCT/CN2024/094108
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-11-27
AI Technical Summary
Legacy wireless networks lack a mechanism for UE-initiated beam management, specifically for requesting uplink resources for beam reports, which is essential for efficient beam management procedures.
A UE transmits an uplink control information (UCI) message to request uplink resources for beam reports, with a retransmission configuration defining whether retransmission is enabled or disabled, and monitors for an uplink grant to perform beam management based on the result, discarding the report or initiating a PRACH procedure if the grant is not received within a specified time.
Enables efficient UE-initiated beam management by ensuring timely resource allocation for beam reports, enhancing communication efficiency and reliability in wireless networks.
Smart Images

Figure CN2024094108_27112025_PF_FP_ABST
Abstract
Description
UPLINK CONTROL INFORMATION FOR INDICATING USER EQUIPMENT-INITIATED BEAM REPORT
[0001] FIELD OF TECHNOLOGY
[0002] The following relates to wireless communications, including uplink control information for indicating user equipment-initiated beam report.BACKGROUND
[0003] 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
[0004] 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.
[0005] A method for wireless communications by a user equipment (UE) is described. The method may include transmitting an uplink control information (UCI) message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled, monitoring for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report, and performing the UE-initiated beam management based on a result of the monitoring for the uplink grant.
[0006] A UE for wireless communications is described. The UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively be operable to execute the code to cause the UE to transmit an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled, monitor for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report, and perform the UE-initiated beam management based on a result of the monitoring for the uplink grant.
[0007] Another UE for wireless communications is described. The UE may include means for transmitting an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled, means for monitoring for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report, and means for performing the UE-initiated beam management based on a result of the monitoring for the uplink grant.
[0008] A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to transmit an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled, monitor for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report, and perform the UE-initiated beam management based on a result of the monitoring for the uplink grant.
[0009] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the retransmission configuration defines the retransmission of the UCI message as being disabled.
[0010] Some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for discarding the beam report based on the uplink grant not being received within a time duration from transmission of the UCI message.
[0011] Some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for performing a physical random-access channel (PRACH) procedure based on the uplink grant not being received within a time duration from transmission of the UCI message, where the beam report may be transmitted during the PRACH procedure.
[0012] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, a time duration associated with monitoring for the uplink grant may be based on at least one of a number of symbols or slots or a time duration relative to the transmission of the UCI message.
[0013] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, the retransmission configuration defines the retransmission of the UCI message as being enabled for a threshold number of retransmissions.
[0014] Some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for discarding the beam report based on the uplink grant not being received within a time duration from the transmission of the UCI message and from each retransmission of the UCI message.
[0015] Some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for performing a PRACH procedure based on the uplink grant not being received within a time duration from the transmission of the UCI message and from each retransmission of the UCI message, where the beam report may be transmitted during the PRACH procedure.
[0016] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, a time duration associated with monitoring for the uplink grant may be based on at least one of a number of symbols or slots or a time duration relative to the transmission of the UCI message.
[0017] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, a prohibit time may be established to monitor for the uplink grant for each of the transmission of the UCI message and each retransmission of the UCI message according to the retransmission configuration.
[0018] Some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for multiplexing the UCI message and the uplink transmission together for transmission based on an overlap between a physical uplink control channel (PUCCH) occasion for the UCI message and an uplink transmission from the UE.
[0019] Some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting the UCI message and the uplink transmission together according to a multiplexing configuration based on an overlap between a PUCCH occasion for the UCI message and an uplink transmission from the UE.
[0020] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, a single configuration for the UCI message may be configured for a cell group and the UCI message may be transmitted according to the single configuration.
[0021] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, multiple configurations for the UCI message may be configured for a cell group, each configuration in the multiple configurations being associated with an event type related to the UE-initiated beam management and the UCI message may be transmitted according to at least one of the multiple configurations based on the event type that triggered the UE-initiated beam management.
[0022] In some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein, performing the UE-initiated beam management may include operations, features, means, or instructions for transmitting the beam report using the set of resources based on receiving the uplink grant.
[0023] Details of one or more implementations of the subject matter described in this disclosure are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages will become apparent from the description, the drawings, and the claims. Note that the relative dimensions of the following figures may not be drawn to scale.BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 shows an example of a wireless communications system that supports uplink control information (UCI) for indicating user equipment (UE) -initiated beam report in accordance with one or more aspects of the present disclosure.
[0025] FIG. 2 shows an example of a wireless communications system that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure.
[0026] FIG. 3 shows an example of a multiplexing configuration that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure.
[0027] FIG. 4 shows an example of a wireless communications system that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure.
[0028] FIGs. 5 and 6 show block diagrams of devices that support UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure.
[0029] FIG. 7 shows a block diagram of a communications manager that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure.
[0030] FIG. 8 shows a diagram of a system including a device that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure.
[0031] FIGs. 9 through 11 show flowcharts illustrating methods that support UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure.DETAILED DESCRIPTION
[0032] Wireless networks may support various beam management procedures between a user equipment (UE) and a network entity. This may include a P2 beam management procedure used to update the transmit beam of the network entity, a P3 beam management procedure used to update the receive beam of the UE, or a beam management procedure that is initiated or otherwise event-driven by the UE. However, legacy networks may not provide a mechanism that supports using a scheduling request for transmission of the request for uplink resources for UE-initiated beam management.
[0033] Accordingly, aspects of the techniques described herein provide for a new uplink control information (UCI) message used by the UE to request uplink resources for a beam report associated with UE-initiated beam management. For example, the UE may transmit or otherwise output a UCI message that requests the uplink resources for a beam report associated with UE-initiated beam management. The UCI message may be transmitted in accordance with a retransmission configuration that defines or otherwise identifies whether a retransmission of the UCI message is enabled or disabled. The UE may monitor for an uplink grant (e.g., a downlink control information (DCI) grant) based on the UCI message. The uplink grant may generally be used to identify or otherwise schedule a set of resources to be used for transmission of the beam report. Accordingly, the UE may perform the UE-initiated beam management based on a result of monitoring for the uplink grant. For example, the UE may transmit the beam report using the set of resources if the UE receives the uplink grant. If the UE does not receive the uplink grant within a time duration, the UE may discard the beam report or may trigger a physical random-access channel (PRACH) procedure and transmit the beam report during the PRACH procedure.
[0034] Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to UCI for indicating UE-initiated beam report.
[0035] FIG. 1 shows an example of a wireless communications system 100 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. The wireless communications system 100 may include one or more devices, such as one or more network devices (e.g., network entities 105) , one or more UEs 115, and a core network 130. In some examples, the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.
[0036] The network entities 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may include devices in different forms or having different capabilities. In various examples, a network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature. In some examples, network entities 105 and UEs 115 may wirelessly communicate via communication link (s) 125 (e.g., a radio frequency (RF) access link) . For example, a network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UEs 115 and the network entity 105 may establish the communication link (s) 125. The coverage area 110 may be an example of a geographic area over which a network entity 105 and a UE 115 may support the communication of signals according to one or more radio access technologies (RATs) .
[0037] The UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communications with various types of devices in the wireless communications system 100 (e.g., other wireless communication devices, including UEs 115 or network entities 105) , as shown in FIG. 1.
[0038] As described herein, a node of the wireless communications system 100, which may be referred to as a network node, or a wireless node, may be a network entity 105 (e.g., any network entity described herein) , a UE 115 (e.g., any UE described herein) , a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, a node may be a UE 115. As another example, a node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In yet other aspects of this example, the first, second, and third nodes may be different relative to these examples. Similarly, reference to a UE 115, network entity 105, apparatus, device, computing system, or the like may include disclosure of the UE 115, network entity 105, apparatus, device, computing system, or the like being a node. For example, disclosure that a UE 115 is configured to receive information from a network entity 105 also discloses that a first node is configured to receive information from a second node.
[0039] In some examples, network entities 105 may communicate with a core network 130, or with one another, or both. For example, network entities 105 may communicate with the core network 130 via backhaul communication link (s) 120 (e.g., in accordance with an S1, N2, N3, or other interface protocol) . In some examples, network entities 105 may communicate with one another via backhaul communication link (s) 120 (e.g., in accordance with an X2, Xn, or other interface protocol) either directly (e.g., directly between network entities 105) or indirectly (e.g., via the core network 130) . In some examples, network entities 105 may communicate with one another via a midhaul communication link 162 (e.g., in accordance with a midhaul interface protocol) or a fronthaul communication link 168 (e.g., in accordance with a fronthaul interface protocol) , or any combination thereof. The backhaul communication link (s) 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., an electrical link, an optical fiber link) or one or more wireless links (e.g., a radio link, a wireless optical link) , among other examples or various combinations thereof. A UE 115 may communicate with the core network 130 via a communication link 155.
[0040] One or more of the network entities 105 or network equipment described herein may include or may be referred to as a base station 140 (e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or giga-NodeB (either of which may be referred to as a gNB) , a 5G NB, a next-generation eNB (ng-eNB) , a Home NodeB, a Home eNodeB, or other suitable terminology) . In some examples, a network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within one network entity (e.g., a network entity 105 or a single RAN node, such as a base station 140) .
[0041] In some examples, a network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) , which may be configured to utilize a protocol stack that is physically or logically distributed among multiple network entities (e.g., network entities 105) , such as an integrated access and backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 105 may include one or more of a central unit (CU) , such as a CU 160, a distributed unit (DU) , such as a DU 165, a radio unit (RU) , such as an RU 170, a RAN Intelligent Controller (RIC) , such as an RIC 175 (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, such as an SMO system 180, or any combination thereof. An RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 105 may be located in distributed locations (e.g., separate physical locations) . In some examples, one or more of the network entities 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
[0042] The split of functionality between a CU 160, a DU 165, and an RU 170 is flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, or any combinations thereof) are performed at a CU 160, a DU 165, or an RU 170. For example, a functional split of a protocol stack may be employed between a CU 160 and a DU 165 such that the CU 160 may support one or more layers of the protocol stack and the DU 165 may support one or more different layers of the protocol stack. In some examples, the CU 160 may host upper protocol layer (e.g., layer 3 (L3) , layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaptation protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU 160 (e.g., one or more CUs) may be connected to a DU 165 (e.g., one or more DUs) or an RU 170 (e.g., one or more RUs) , or some combination thereof, and the DUs 165, RUs 170, or both may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or multiple different cells (e.g., via one or multiple different RUs, such as an RU 170) . In some cases, a functional split between a CU 160 and a DU 165 or between a DU 165 and an RU 170 may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU 160, a DU 165, or an RU 170, while other functions of the protocol layer are performed by a different one of the CU 160, the DU 165, or the RU 170) . A CU 160 may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU 160 may be connected to a DU 165 via a midhaul communication link 162 (e.g., F1, F1-c, F1-u) , and a DU 165 may be connected to an RU 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface) . In some examples, a midhaul communication link 162 or a fronthaul communication link 168 may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities (e.g., one or more of the network entities 105) that are in communication via such communication links.
[0043] In some wireless communications systems (e.g., the wireless communications system 100) , infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network 130) . In some cases, in an IAB network, one or more of the network entities 105 (e.g., network entities 105 or IAB node (s) 104) may be partially controlled by each other. The IAB node (s) 104 may be referred to as a donor entity or an IAB donor. A DU 165 or an RU 170 may be partially controlled by a CU 160 associated with a network entity 105 or base station 140 (such as a donor network entity or a donor base station) . The one or more donor entities (e.g., IAB donors) may be in communication with one or more additional devices (e.g., IAB node (s) 104) via supported access and backhaul links (e.g., backhaul communication link (s) 120) . IAB node (s) 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by one or more DUs (e.g., DUs 165) of a coupled IAB donor. An IAB-MT may be equipped with an independent set of antennas for relay of communications with UEs 115 or may share the same antennas (e.g., of an RU 170) of IAB node (s) 104 used for access via the DU 165 of the IAB node (s) 104 (e.g., referred to as virtual IAB-MT (vIAB-MT) ) . In some examples, the IAB node (s) 104 may include one or more DUs (e.g., DUs 165) that support communication links with additional entities (e.g., IAB node (s) 104, UEs 115) within the relay chain or configuration of the access network (e.g., downstream) . In such cases, one or more components of the disaggregated RAN architecture (e.g., the IAB node (s) 104 or components of the IAB node (s) 104) may be configured to operate according to the techniques described herein.
[0044] For instance, an access network (AN) or RAN may include communications between access nodes (e.g., an IAB donor) , IAB node (s) 104, and one or more UEs 115. The IAB donor may facilitate connection between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130) . That is, an IAB donor may refer to a RAN node with a wired or wireless connection to the core network 130. The IAB donor may include one or more of a CU 160, a DU 165, and an RU 170, in which case the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link) . The IAB donor and IAB node (s) 104 may communicate via an F1 interface according to a protocol that defines signaling messages (e.g., an F1 AP protocol) . Additionally, or alternatively, the CU 160 may communicate with the core network 130 via an interface, which may be an example of a portion of a backhaul link, and may communicate with other CUs (e.g., including a CU 160 associated with an alternative IAB donor) via an Xn-C interface, which may be an example of another portion of a backhaul link.
[0045] IAB node (s) 104 may refer to RAN nodes that provide IAB functionality (e.g., access for UEs 115, wireless self-backhauling capabilities) . A DU 165 may act as a distributed scheduling node towards child nodes associated with the IAB node (s) 104, and the IAB-MT may act as a scheduled node towards parent nodes associated with IAB node (s) 104. That is, an IAB donor may be referred to as a parent node in communication with one or more child nodes (e.g., an IAB donor may relay transmissions for UEs through other IAB node (s) 104) . Additionally, or alternatively, IAB node (s) 104 may also be referred to as parent nodes or child nodes to other IAB node (s) 104, depending on the relay chain or configuration of the AN. The IAB-MT entity of IAB node (s) 104 may provide a Uu interface for a child IAB node (e.g., the IAB node (s) 104) to receive signaling from a parent IAB node (e.g., the IAB node (s)
[0046] 104) , and a DU interface (e.g., a DU 165) may provide a Uu interface for a parent IAB node to signal to a child IAB node or UE 115.
[0047] For example, IAB node (s) 104 may be referred to as parent nodes that support communications for child IAB nodes, or may be referred to as child IAB nodes associated with IAB donors, or both. An IAB donor may include a CU 160 with a wired or wireless connection (e.g., backhaul communication link (s) 120) to the core network 130 and may act as a parent node to IAB node (s) 104. For example, the DU 165 of an IAB donor may relay transmissions to UEs 115 through IAB node (s) 104, or may directly signal transmissions to a UE 115, or both. The CU 160 of the IAB donor may signal communication link establishment via an F1 interface to IAB node (s) 104, and the IAB node (s) 104 may schedule transmissions (e.g., transmissions to the UEs 115 relayed from the IAB donor) through one or more DUs (e.g., DUs 165) . That is, data may be relayed to and from IAB node (s) 104 via signaling via an NR Uu interface to MT of IAB node (s) 104 (e.g., other IAB node (s) ) . Communications with IAB node (s) 104 may be scheduled by a DU 165 of the IAB donor or of IAB node (s) 104.
[0048] In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support test as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., components such as an IAB node, a DU 165, a CU 160, an RU 170, an RIC 175, an SMO system 180) .
[0049] A UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer. In some examples, a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, vehicles, or meters, among other examples.
[0050] The UEs 115 described herein may be able to communicate with various types of devices, such as UEs 115 that may sometimes operate as relays, as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
[0051] The UEs 115 and the network entities 105 may wirelessly communicate with one another via the communication link (s) 125 (e.g., one or more access links) using resources associated with one or more carriers. The term “carrier” may refer to a set of RF spectrum resources having a defined PHY layer structure for supporting the communication link (s) 125. For example, a carrier used for the communication link (s) 125 may include a portion of an RF spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more PHY layer channels for a given RAT (e.g., LTE, LTE-A, LTE-A Pro, NR) . Each PHY layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. Communication between a network entity 105 and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity 105. For example, the terms “transmitting, ” “receiving, ” or “communicating, ” when referring to a network entity 105, may refer to any portion of a network entity 105 (e.g., a base station 140, a CU 160, a DU 165, a RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities, such as one or more of the network entities 105) .
[0052] In some examples, such as in a carrier aggregation configuration, a carrier may have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute RF channel number (EARFCN) ) and may be identified according to a channel raster for discovery by the UEs 115. A carrier may be operated in a standalone mode, in which case initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non-standalone mode, in which case a connection is anchored using a different carrier (e.g., of the same or a different RAT) .
[0053] The communication link (s) 125 of the wireless communications system 100 may include downlink transmissions (e.g., forward link transmissions) from a network entity 105 to a UE 115, uplink transmissions (e.g., return link transmissions) from a UE 115 to a network entity 105, or both, among other configurations of transmissions. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
[0054] A carrier may be associated with a particular bandwidth of the RF spectrum and, in some examples, the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100. For example, the carrier bandwidth may be one of a set of bandwidths for carriers of a particular RAT (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) . Devices of the wireless communications system 100 (e.g., the network entities 105, the UEs 115, or both) may have hardware configurations that support communications using a particular carrier bandwidth or may be configurable to support communications using one of a set of carrier bandwidths. In some examples, the wireless communications system 100 may include network entities 105 or UEs 115 that support concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured for operating using portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
[0055] Signal waveforms transmitted via a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) . In a system employing MCM techniques, a resource element may refer to resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The quantity of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) , such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication. A wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam) , and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE 115.
[0056] One or more numerologies for a carrier may be supported, and a numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
[0057] The time intervals for the network entities 105 or the UEs 115 may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of Ts=1 / ( Δfmax·Nf) seconds, for which Δfmax may represent a supported subcarrier spacing, and Nf may represent a supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) . Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
[0058] Each frame may include multiple consecutively-numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a quantity of slots. Alternatively, each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing. Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . In some wireless communications systems, such as the wireless communications system 100, a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., Nf) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
[0059] A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) . In some examples, the TTI duration (e.g., a quantity of symbol periods in a TTI) may be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
[0060] Physical channels may be multiplexed for communication using a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET) ) for a physical control channel may be defined by a set of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115. For example, one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to UEs 115 (e.g., one or more UEs) or may include UE-specific search space sets for sending control information to a UE 115 (e.g., a specific UE) .
[0061] A network entity 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with a network entity 105 (e.g., using a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) ) . In some examples, a cell also may refer to a coverage area 110 or a portion of a coverage area 110 (e.g., a sector) over which the logical communication entity operates. Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the network entity 105. For example, a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with coverage areas 110, among other examples.
[0062] A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell. A small cell may be associated with a network entity 105 operating with lower power (e.g., a base station 140 operating with lower power) relative to a macro cell, and a small cell may operate using the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (e.g., the UEs 115 in a closed subscriber group (CSG) , the UEs 115 associated with users in a home or office) . A network entity 105 may support one or more cells and may also support communications via the one or more cells using one or multiple component carriers.
[0063] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) ) that may provide access for different types of devices.
[0064] In some examples, a network entity 105 (e.g., a base station 140, an RU 170) may be movable and therefore provide communication coverage for a moving coverage area, such as the coverage area 110. In some examples, coverage areas 110 (e.g., different coverage areas) associated with different technologies may overlap, but the coverage areas 110 (e.g., different coverage areas) may be supported by the same network entity (e.g., a network entity 105) . In some other examples, overlapping coverage areas, such as a coverage area 110, associated with different technologies may be supported by different network entities (e.g., the network entities 105) . The wireless communications system 100 may include, for example, a heterogeneous network in which different types of the network entities 105 support communications for coverage areas 110 (e.g., different coverage areas) using the same or different RATs.
[0065] The wireless communications system 100 may support synchronous or asynchronous operation. For synchronous operation, network entities 105 (e.g., base stations 140) may have similar frame timings, and transmissions from different network entities (e.g., different ones of the network entities 105) may be approximately aligned in time. For asynchronous operation, network entities 105 may have different frame timings, and transmissions from different network entities (e.g., different ones of network entities 105) may, in some examples, not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations.
[0066] Some UEs 115, such as MTC or IoT devices, may be relatively low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication) . M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a network entity 105 (e.g., a base station 140) without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that uses the information or presents the information to humans interacting with the application program. Some UEs 115 may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
[0067] Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception concurrently) . In some examples, half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for the UEs 115 may include entering a power saving deep sleep mode when not engaging in active communications, operating using a limited bandwidth (e.g., according to narrowband communications) , or a combination of these techniques. For example, some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
[0068] The wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) . The UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.
[0069] In some examples, a UE 115 may be configured to support communicating directly with other UEs (e.g., one or more of the UEs 115) via a device-to-device (D2D) communication link, such as a D2D communication link 135 (e.g., in accordance with a peer-to-peer (P2P) , D2D, or sidelink protocol) . In some examples, one or more UEs 115 of a group that are performing D2D communications may be within the coverage area 110 of a network entity 105 (e.g., a base station 140, an RU 170) , which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity 105. In some examples, one or more UEs 115 of such a group may be outside the coverage area 110 of a network entity 105 or may be otherwise unable to or not configured to receive transmissions from a network entity 105. In some examples, groups of the UEs 115 communicating via D2D communications may support a one-to-many (1: M) system in which each UE 115 transmits to one or more of the UEs 115 in the group. In some examples, a network entity 105 may facilitate the scheduling of resources for D2D communications. In some other examples, D2D communications may be carried out between the UEs 115 without an involvement of a network entity 105.
[0070] In some systems, a D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115) . In some examples, vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. A vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., network entities 105, base stations 140, RUs 170) using vehicle-to-network (V2N) communications, or with both.
[0071] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the network entities 105 (e.g., base stations 140) associated with the core network 130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services 150 for one or more network operators. The IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
[0072] The wireless communications system 100 may operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) . Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to as clusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than one hundred kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
[0073] The wireless communications system 100 may also operate using a super high frequency (SHF) region, which may be in the range of 3 GHz to 30 GHz, also known as the centimeter band, or using an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band. In some examples, the wireless communications system 100 may support millimeter wave (mmW) communications between the UEs 115 and the network entities 105 (e.g., base stations 140, RUs 170) , and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, such techniques may facilitate using antenna arrays within a device. The propagation of EHF transmissions, however, may be subject to even greater attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
[0074] The wireless communications system 100 may utilize both licensed and unlicensed RF spectrum bands. For example, the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) RAT, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. While operating using unlicensed RF spectrum bands, devices such as the network entities 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance. In some examples, operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA) . Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
[0075] A network entity 105 (e.g., a base station 140, an RU 170) or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a network entity 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a network entity 105 may be located at diverse geographic locations. A network entity 105 may include an antenna array with a set of rows and columns of antenna ports that the network entity 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally, or alternatively, an antenna panel may support RF beamforming for a signal transmitted via an antenna port.
[0076] The network entities 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords) . Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) , for which multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) , for which multiple spatial layers are transmitted to multiple devices.
[0077] Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating along particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
[0078] A network entity 105 or a UE 115 may use beam sweeping techniques as part of beamforming operations. For example, a network entity 105 (e.g., a base station 140, an RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a network entity 105 multiple times along different directions. For example, the network entity 105 may transmit a signal according to different beamforming weight sets associated with different directions of transmission. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device, such as a network entity 105, or by a receiving device, such as a UE 115) a beam direction for later transmission or reception by the network entity 105.
[0079] Some signals, such as data signals associated with a particular receiving device, may be transmitted by a transmitting device (e.g., a network entity 105 or a UE 115) along a single beam direction (e.g., a direction associated with the receiving device, such as another network entity 105 or UE 115) . In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted along one or more beam directions. For example, a UE 115 may receive one or more of the signals transmitted by the network entity 105 along different directions and may report to the network entity 105 an indication of the signal that the UE 115 received with a highest signal quality or an otherwise acceptable signal quality.
[0080] In some examples, transmissions by a device (e.g., by a network entity 105 or a UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from a network entity 105 to a UE 115) . The UE 115 may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more sub-bands. The network entity 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS)) , which may be precoded or unprecoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook) . Although these techniques are described with reference to signals transmitted along one or more directions by a network entity 105 (e.g., a base station 140, an RU 170) , a UE 115 may employ similar techniques for transmitting signals multiple times along different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal along a single direction (e.g., for transmitting data to a receiving device) .
[0081] A receiving device (e.g., a UE 115) may perform reception operations in accordance with multiple receive configurations (e.g., directional listening) when receiving various signals from a transmitting device (e.g., a network entity 105) , such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may perform reception in accordance with multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal) . The single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR) , or otherwise acceptable signal quality based on listening according to multiple beam directions) .
[0082] The wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or PDCP layer may be IP-based. An RLC layer may perform packet segmentation and reassembly to communicate via logical channels. A MAC layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer also may implement error detection techniques, error correction techniques, or both to support retransmissions to improve link efficiency. In the control plane, an RRC layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a network entity 105 or a core network 130 supporting radio bearers for user plane data. A PHY layer may map transport channels to physical channels.
[0083] The UEs 115 and the network entities 105 may support retransmissions of data to increase the likelihood that data is received successfully. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly via a communication link (e.g., the communication link (s) 125, a D2D communication link 135) . HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) . HARQ may improve throughput at the MAC layer in relatively poor radio conditions (e.g., low signal-to-noise conditions) . In some examples, a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific slot for data received via a previous symbol in the slot. In some other examples, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
[0084] A UE 115 may transmit an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, wherein the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled. The UE 115 may monitor for an uplink grant based at least in part on the UCI message, wherein the uplink grant identifies a set of resources to be used for transmission of the beam report. The UE 115 may perform the UE-initiated beam management based at least in part on a result of the monitoring for the uplink grant.
[0085] FIG. 2 shows an example of a wireless communications system 200 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. Wireless communications system 200 may implement aspects of wireless communications system 100. Wireless communications system 200 may include a UE 205 and a network entity 210, which may be examples of the corresponding devices described herein.
[0086] Wireless networks may support beam reporting operations by UE, such as to support beamformed or directional communications between the UE and the network. The beam reporting may generally include the UE and the network exchanging various messages to update or otherwise manage the transmit beam, the receive beam, or both beams, being used by the UE and the network. For example, the beam reporting may include various indications of metric (s) associated with the current beam (s) being used for wireless communications. These metric (s) may provide an indication of whether the current beam (s) are suffering from propagation loss, signal blockage, fading effects, throughput drop, or other indication (s) or information related to the performance of the current beam (s) . Based on such metric (s) , new or updated beams may be identified and switched to (e.g., for intra-cell mobility or beam-level mobility) in response to deterioration of the current beam (s) (e.g., due to mobility or other factors) . Such beam management techniques may be applied when the UE is operating in an idle mode or a connected mode with the network.
[0087] In some aspects, the beam reporting operations may be applicable for different scenarios. One example may include initial beam detection that is utilized by the UE during cell acquisition and random-access channel (RACH) procedures. Other examples may include a P1 beam reporting procedure (e.g., during beam selection) , a P2 beam reporting procedure (e.g., for refinement of the gNB transmit beam) , or a P3 beam reporting procedure (e.g., for refinement of the UE receive beam) . Such beam management techniques are generally based on SSB or CSI-RS transmissions from the gNB (e.g., the network entity 210) .
[0088] In some examples, the beam reporting techniques may include the UE transmitting a beam report based on an event that is detected or otherwise initiated at the UE.For example, such UE-initiated or event-driven beam reporting and management may be based on various radio measurements or sensor inputs (e.g., state changes) observed by the UE that would warrant confirmation of or an update to the current transmit beam of the gNB or the receive beam of the UE. Accordingly, the UE may transmit a UE-initiated or event-driven beam report (e.g., beam report) to the network to initiate such beam management protocols. Such UE-initiated beam management protocols may support fast beam switching and may enable the UE to notify the network of the pending beam report.
[0089] More particular, for UE-initiated or event-driven beam reporting such triggering event (s) or detection for the beam reporting may be based on various quality metrics associated with a (pre) defined event satisfying a threshold. For example, the UE-initiated beam report may be based on the quality of the current beam being worse than the threshold. The UE-initiated beam report may be based on the quality of at least one new beam, such as a L1-RSRP, becoming a threshold value better than the current beam. The UE-initiated beam report may be based on the quality of a new beam being better than a threshold. The UE-initiated beam report may be based on the quality of the current beam being worse than a first threshold and the quality of at least one new beam being better than a second threshold. Other considerations or metrics may be used for UE-initiated beam management.
[0090] In some wireless networks, the UE-initiated or event-driven beam report from the UE may follow a lengthy process that, in some aspects, introduces significant latency into the wireless network. For example, such UE-initiated or event-driven beam management may include (e.g., for dynamically scheduling UCI by the gNB-based reporting) the UE transmitting a first PUCCH (e.g., one or more bit (s) ) to request a resource for a second UL channel to carry the beam report upon occurrence or detection of the triggering event. The network may respond by transmitting an uplink grant (e.g., a DCI having a specific format) that identifies the uplink resources for the second uplink channel. The UE may monitor various control channels (e.g., PDCCH) to determine when the uplink grant is received. The UE may then use the uplink resources provided in the uplink grant to transmit the UE-initiated or event-driven beam report in an uplink transmission on the second uplink channel. The beam report may be carried in dynamically scheduled or semi-persistent resources (e.g., configured grant (CG) resources) , as identified by the uplink grant. Accordingly, in some aspects cross-CC beam reporting may be supported (e.g., between the first and second uplink channels) .
[0091] Accordingly, in some wireless networks the UE may send the first PUCCH, which indicates to the network that the UE-initiated or event-driven beam report is pending transmission by the UE. However, such wireless networks may not support using existing scheduling request (SR) for the initial uplink transmission (e.g., the request the uplink resources) since the SR format is designed for MAC-CE or data structures.
[0092] Accordingly, aspects of the techniques described herein provide for a new UCI design for the first PUCCH (e.g., for the initial uplink transmission requesting the uplink resources for transmission of the UE-initiated or event-driven beam report) . For example, the UE 205 may transmit or otherwise output (and the network entity 210 may receive or otherwise obtain) a UCI message (e.g., the UCI 215) that requests uplink resources for transmission of a beam report associated with UE-initiated beam management. For example, the beam report may be a UE-initiated or event-driven beam report that initiates the beam management process with the network entity 210. In some examples, the UCI for the beam report may also be referred to as a UE-initiated beam report UCI (UEI-UCI) that is transmitted in a first PUCCH.
[0093] The UE 205 may monitor for an uplink grant from the network entity 210 based on the UCI message. For example, the uplink grant may be a DCI grant that carries or otherwise conveys information identifying a set of resources to be used for transmission of the beam report. Accordingly, the UE 205 may perform the UE-initiated beam management based on a result of the monitoring for the uplink grant. For example, the UE 205 may transmit or otherwise output (and the network entity 210 may receive or otherwise obtain) the beam report using the set of resources when the UE 205 receives the uplink grant. That is, in the example where the UE 205 receives the uplink grant in response to the UCI message transmission the UE 205 may use the uplink resources identified in the uplink grant to transmit the beam report to the network entity 210.
[0094] In some aspects, the UCI message may be transmitted in accordance with a retransmission configuration that defines whether or not a retransmission of the UCI message is enabled. For example, the retransmission configuration may be (pre) configured using RRC signaling or other higher layer signaling techniques to the UE 205 from the network entity 210. In some aspects, the retransmission configuration may be applied in the scenario where the UE 205 does not receive the uplink grant from the network entity 210 within a time duration.
[0095] This may include the UE 205 transmitting an initial instance of the UCI message (e.g., the UCI 215-a) based on detection or otherwise identifying that the event or threshold has occurred. When the UE 205 has not received the uplink grant within the time duration, the UE 205 may use the retransmission configuration to identify or otherwise determine whether a retransmission of the UCI message (e.g., the UCI 215-b) has been enabled or disabled. In some aspects, the UE 205 may be (pre) configured with periodic and offset PUCCH occasions for the UCI message (e.g., the UEI-UCI) . This may define a set of uplink resources that are periodic in nature and available for the UE 205 to use to transmit the initial and retransmission, when applicable, UCI message (s) .
[0096] In some aspects, the retransmission configuration may define the retransmission of the UCI message (e.g. the UCI 215-b) as being disabled. That is, the retransmission configuration may indicate or otherwise identify that the UE 205 is not to perform a retransmission of the UCI message. For example, the transmission of the UEI-UCI may be considered a one-shot only transmission. The UE 205 may store the beam report after transmitting the initial transmission of the UCI message (e.g., the UCI 215-a) and wait the time duration for the uplink grant (e.g., the DCI grant) from the network.
[0097] In some aspects, the initial or retransmission of the UCI message may be based on or otherwise associated with the time duration. Broadly, the time duration may be associated with monitoring for the uplink grant based on a number of symbol (s) or slot (s) or the time duration may be relative to the transmission of the UCI message. That is, in some examples the time duration may correspond to a number of slot (s) or symbols that the UE 205 is to monitor for the uplink grant from the network entity 210. The number of slot (s) or symbol (s) may be from the transmission time of the initial transmission of the UCI message (e.g., the UCI 215-a) . In the situation where cross-CC beam reporting is supported, the first PUCCH (e.g., the UCI 215-a) and the uplink grant may be in different CCs of different SCSs. In some aspects of this scenario, the time duration may be based on the minimum or the maximum SCS among all the CCs being used to identify or otherwise determine the number of symbol (s) or slot (s) . In some aspects of this scenario, the time duration may be based on a default reference SCS being used to identify or otherwise determine the number of symbol (s) or slot (s) . In some examples, the time duration may be a number of absolute time units (e.g., X milliseconds) , such as relative to the transmission time of the UCI message (e.g., the UCI 215-a) .
[0098] In this scenario where the retransmission configuration defines the retransmission of the UCI message as being disabled, the UE 205 may have different responses available when the uplink grant has not been received within the time duration. In some scenarios, the UE 205 may discard the beam report based on the uplink grant not being received within the time duration from transmission of the UCI message. That is, the UE 205 may discard the UE-initiated beam report when detecting no uplink grant from the network entity 210. In some scenarios, the UE 205 may perform a physical random-access channel (PRACH) procedure based on the uplink grant not being received within the time duration from transmission of the UCI message. In this scenario, the UE 205 may transmit or otherwise provide the beam report during the PRACH procedure. That is, the UE 205 may keep the UE-initiated beam report and trigger a PRACH transmission (e.g., a RACH message one (Msg1) or a message A (MsgA) ) . In some examples, the UE-initiated beam report may be transmitted in a RACH message three (Msg3) in a four-step RACH procedure or in a message B (MsgB) in a two-step RACH procedure) .
[0099] In this scenario where the retransmission configuration defines the retransmission of the UCI message as being enabled, this may include the retransmission of the UCI message being performed a threshold number of times. That is, in some examples the retransmission configuration may define or otherwise identify that UEI-UCI may be retransmitted up to a maximum number of times for the same beam report. For example, the UE 205 may be (pre) configured with periodic and offset PUCCH occasions for the UEI-UCI. The UE 205 can transmit the UEI-UCI (e.g., the UCI 215-a) in multiple occasions until reaching the maximum number of times (e.g., the threshold number of retransmissions) .
[0100] In this scenario, the retransmission (s) of the UCI message may again be based on the time duration. The time duration may be based on or otherwise associated with a number of symbol (s) or slot (s) or a time duration relative to a (re) transmission of the UCI message. For example, the UE 205 may be configured with a prohibit timer after each (re) transmission of the UEI-UCI to detect the uplink grant from the network entity 210. Within the prohibit timer, the UE 205 may not send the second UEI-UCI for the same beam report. That is, the UE 205 may initiate a prohibit timer (e.g., a corresponding time duration) after each (re) transmission of the UCI message and wait until the prohibit timer has expired before performing another transmission of the UCI message for the same beam report. Accordingly, the prohibit timer may be established to monitor for the uplink grant for each transmission (e.g. UCI 215-a) and for each retransmission (e.g., one or more of UCI 215-b) according to the retransmission configuration. The prohibit timer may be a number of slot (s) or symbol (s) or may be a number of absolute time units (e.g., X ms) .
[0101] If the UE 205 has not received an uplink grant from the network entity 210 after the maximum number of retransmissions, the UE 205 may again have different response options. One option may include the UE 205 discarding the beam report based on the uplink grant not being received within the time duration (e.g., the corresponding prohibit timer) from the transmission of the UCI message and from each retransmission of the UCI message. That is, the UE 205 may discard the UE-initiated beam report when no uplink grant is detected after reaching the maximum number of (re) transmissions of the UCI message. Another option may include the UE 205 performing a PRACH procedure based on the uplink grant not being received within the time duration (e.g., the corresponding prohibit timer) from the transmission of the UCI message (e.g., the UCI 215-a) and from each retransmission of the UCI message (e.g., one or more of UCI 215-b) . The UE 205 may transmit the beam report during the PRACH procedure. That is, the UE 205 may keep the UE-initiated beam report and trigger a PRACH transmission after reaching the maximum number of (re) transmissions of the UCI message. The UE-initiated beam report may be transmitted during the PRACH procedure (e.g., in Msg3 or MsgB) .
[0102] Accordingly, the techniques described herein provide various mechanisms for a UCI message to be transmitted-and retransmitted, in some scenarios-requesting uplink resources for transmission of a UE-initiated or event-driven beam report. These techniques may be used for UE-initiated beam management to support fast beam switching and to generally reduce the latency associated with other beam reporting techniques.
[0103] FIG. 3 shows an example of a multiplexing configuration 300 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. Multiplexing configuration 300 may implement aspects of wireless communications system 100 or wireless communications system 200. Aspects of multiplexing configuration 300 may be implemented at or implemented by a UE or a network entity, which may be examples of the corresponding devices described herein.
[0104] As discussed above, aspects of the techniques described herein provide for a UCI message being used to request uplink resources for a UE-initiated or event-driven beam report (e.g., as part of UE-initiated beam management) . For example, the UE may transmit a UCI message that requests the uplink resources for transmission of a beam report associated with UE-initiated beam management. The UCI message may be transmitted using periodic and offset PUCCH resource occasions configured for the UE. The UCI message may be transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled. That is, the retransmission configuration may generally provide an indication of whether or not the UE is to perform a retransmission of the UCI message.
[0105] For example, the UE may monitor for an uplink grant based on the UCI message. That uplink grant may identify a set of resources to be used for transmission of the beam report. The UE may perform the UE-initiated beam management based on the result of the monitoring. For example, the UE may transmit the beam report in the scenario where the uplink grant is received within a time duration. If no uplink grant is received within the time duration, the UE may perform a maximum number of retransmissions of the UCI message in accordance with the retransmission configuration defining the retransmissions as being enabled. A prohibit timer may be initiated for each transmission and retransmission of the UCI message during which the UE waits for the uplink grant to be received. The UE may perform retransmissions of the UCI message upon expiry of the prohibit timer for the most recent (re) transmission. The UE may receive the uplink grant and use the set of uplink resources to transmit the beam report in response to any (re) transmission of the UCI message.
[0106] Multiplexing configuration 300 illustrates a non-limiting example of a situation where there is an overlap between a PUCCH occasion for the UCI message (e.g., a PUCCH occasion 305) and an uplink transmission from the UE (e.g., a PUCCH / PUSCH occasion 310) . That is, multiplexing configuration 300 illustrates an example where a PUCCH occasion 305 for a UEI-UCI overlaps (e.g., in the time domain) with any other PUCCH or PUSCH (e.g., the PUCCH / PUSCH occasion 310) . In this scenario, the UE may perform different options regarding the overlap and the UCI message transmission.
[0107] In one example, this may include the UE piggybacking the UEI-UCI or multiplexing the UEI-UCI with the other UCI, if any, onto the other PUCCH or PUSCH. For example, the UE may multiplex (or piggyback) the UCI message and the uplink transmission together for transmission based on the overlap between the PUCCH occasion 305 to be used for the UCI message transmission and the uplink transmission from the UE (e.g., during the PUCCH / PUSCH occasion 310) .
[0108] In another example, this may include the UE transmitting the UCI message and the uplink transmission together according to a multiplexing configuration based on the overlap between the PUCCH occasion 305 and the PUCCH / PUSCH occasion 310. For example, the UE may identify or otherwise determine whether to multiplex the UEI-UCI onto the other PUCCH or PUSCH based on an RRC configuration. If enabled, the UEI-UCI may be piggybacked or multiplexed with the other UCI in the other PUCCH or PUSCH (e.g., during the PUCCH / PUSCH occasion 310) . If not enabled, the UEI-UCI may be transmitted or dropped according to a priority rule. For example, the UE may transmit the UCI message during the PUCCH occasion 305 when the priority associated with the UCI message is higher than the priority associated with the other uplink transmission from the UE. The UE may drop the UCI message and, instead, transmit the other uplink message when the UCI message is associated with a lower priority level.
[0109] In some situations, the UE may have to transmit the UEI-UCI on the other PUCCH or PUSCH. In this situation and when no event has been detected for UE-initiated beam management, the UE may set the UEI-UCI to indicate a status of no event or no beam report. That is, the UE may set a field or parameter in the UCI message to a value that indicates that there is no UE-initiated or event-drive beam report to be transmitted by the UE.
[0110] FIG. 4 shows an example of a wireless communications system 400 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. Wireless communications system 400 may implement aspects of wireless communications system 100 or wireless communications system 200 or aspects of multiplexing configuration 300. Wireless communications system 400 may include a UE 405, a network entity 410, a network entity 415, and a network entity 420, which may be examples of the corresponding devices described herein. In some aspects, the network entity 410, the network entity 415, and the network entity 420 may form a cell group 425 for the UE 405.
[0111] As discussed above, aspects of the techniques described herein provide for a UCI message being used to request uplink resources for a UE-initiated or event-driven beam report (e.g., as part of UE-initiated beam management) . For example, the UE 405 may transmit a UCI message that requests the uplink resources for transmission of a beam report associated with UE-initiated beam management. The UCI message may be transmitted using periodic and offset PUCCH resource occasions configured for the UE 405. The UCI message may be transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled. That is, the retransmission configuration may generally provide an indication of whether or not the UE 405 is to perform a retransmission of the UCI message.
[0112] For example, the UE 405 may monitor for an uplink grant based on the UCI message. That uplink grant may identify a set of resources to be used for transmission of the beam report. The UE 405 may perform the UE-initiated beam management based on the result of the monitoring. For example, the UE 405 may transmit the beam report in the scenario where the uplink grant is received within a time duration. If no uplink grant is received within the time duration, the UE 405 may perform a maximum number of retransmissions of the UCI message in accordance with the retransmission configuration defining the retransmissions as being enabled. A prohibit timer may be initiated for each transmission and retransmission of the UCI message during which the UE 405 waits for the uplink grant to be received. The UE 405 may perform retransmissions of the UCI message upon expiry of the prohibit timer for the most recent (re) transmission. The UE 405 may receive the uplink grant and use the set of uplink resources to transmit the beam report in response to any (re) transmission of the UCI message.
[0113] Wireless communications system 400 illustrates a non-limiting example of a situation where the UE 405 is configured with a cell group 425. The cell group 425 may include the network entity 410, the network entity 415, and the network entity 420, although a different number of network entities may be included in the cell group 425. In some aspects, the cell group 425 may include a master cell group (MCG) and one or more secondary cell group (s) (SCG) (s) . Accordingly, the UE 405 may be configured such that the UEI-UCI indication (e.g., the UCI message) may be provided in a cell group 425. In this scenario, different approaches may be applied for the UCI message transmission.
[0114] In some cases, a single configuration for the UCI message may be configured for the cell group 425. In this example, the UCI message may be transmitted according to the single configuration. That is, the UE may be configured with a single UEI-UCI indication per-cell group 425 and any event configuration / UE-initiated beam report configuration in the cell group 425 may trigger transmission of the UEI-UCI. Accordingly, in this example the UEI-UCI indication is configured per-cell group 425.
[0115] In this example, the per-cell group 425 configuration may include the UE 405 receiving or otherwise obtaining an RRC signal or other signaling means that indicates the per-cell group 425. One non-limiting example of the configuration may include the UE 405 being configured according to:
[0116] and
[0117] In another case, the UE 405 may be configured with multiple configurations for the UCI message for each cell group. That is, each configuration in the multiple configurations may be associated with an event type related to the UE-initiated beam management. The UCI message may, therefore, be transmitted according to at least one of the multiple configurations based on the event type that triggered the UE-initiated beam management. That is, the UE 405 may be configured with more than one UEI-UCI indications per-cell group 425 and different event configurations / UE-initiated beam report configurations in the cell group 425 may be associated with different UEI-UCI indications and trigger the transmission of the UEI-UCI accordingly. In some aspects, the maximum UEI-UCI indication per-cell group (e.g., maxNrofUEI-ConfigPerCellGroup) may be based on the UE capability (e.g., based on UE capability message signaling between the UE 405 and a serving cell within the cell group 425) .
[0118] In this example, the multiple cell group configuration may include the UE 405 receiving or otherwise obtaining an RRC signal or other signaling means that indicates the multiple configurations. One non-limiting example of the configuration may include the UE 405 being configured according to:
[0119] and
[0120] and
[0121] and
[0122] Accordingly, the techniques described herein provide various mechanisms for a UCI message to be transmitted-and retransmitted, in some scenarios-requesting uplink resources for transmission of a UE-initiated or event-driven beam report. These techniques may be used for UE-initiated beam management to support fast beam switching and to generally reduce the latency associated with other beam reporting techniques.
[0123] FIG. 5 shows a block diagram 500 of a device 505 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. The device 505 may be an example of aspects of a UE 115 as described herein. The device 505 may include a receiver 510, a transmitter 515, and a communications manager 520. The device 505, or one or more components of the device 505 (e.g., the receiver 510, the transmitter 515, the communications manager 520) , may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0124] The receiver 510 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to UCI for indicating UE-initiated beam report) . Information may be passed on to other components of the device 505. The receiver 510 may utilize a single antenna or a set of multiple antennas.
[0125] The transmitter 515 may provide a means for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to UCI for indicating UE-initiated beam report) . In some examples, the transmitter 515 may be co-located with a receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or a set of multiple antennas.
[0126] The communications manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be examples of means for performing various aspects of UCI for indicating UE-initiated beam report as described herein. For example, the communications manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be capable of performing one or more of the functions described herein.
[0127] In some examples, the communications manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include at least one of a processor, a digital signal processor (DSP) , a central processing unit (CPU) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure. In some examples, at least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .
[0128] Additionally, or alternatively, the communications manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by at least one processor (e.g., referred to as a processor-executable code) . If implemented in code executed by at least one processor, the functions of the communications manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .
[0129] In some examples, the communications manager 520 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 510, the transmitter 515, or both. For example, the communications manager 520 may receive information from the receiver 510, send information to the transmitter 515, or be integrated in combination with the receiver 510, the transmitter 515, or both to obtain information, output information, or perform various other operations as described herein.
[0130] The communications manager 520 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 520 is capable of, configured to, or operable to support a means for transmitting an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled. The communications manager 520 is capable of, configured to, or operable to support a means for monitoring for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report. The communications manager 520 is capable of, configured to, or operable to support a means for performing the UE-initiated beam management based on a result of the monitoring for the uplink grant.
[0131] By including or configuring the communications manager 520 in accordance with examples as described herein, the device 505 (e.g., at least one processor controlling or otherwise coupled with the receiver 510, the transmitter 515, the communications manager 520, or a combination thereof) may support techniques for a UCI message to be transmitted-and retransmitted, in some scenarios-requesting uplink resources for transmission of a UE-initiated or event-driven beam report. These techniques may be used for UE-initiated beam management to support fast beam switching and to generally reduce the latency associated with other beam reporting techniques.
[0132] FIG. 6 shows a block diagram 600 of a device 605 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. The device 605 may be an example of aspects of a device 505 or a UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communications manager 620. The device 605, or one of more components of the device 605 (e.g., the receiver 610, the transmitter 615, the communications manager 620) , may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
[0133] The receiver 610 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to UCI for indicating UE-initiated beam report) . Information may be passed on to other components of the device 605. The receiver 610 may utilize a single antenna or a set of multiple antennas.
[0134] The transmitter 615 may provide a means for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to UCI for indicating UE-initiated beam report) . In some examples, the transmitter 615 may be co-located with a receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a set of multiple antennas.
[0135] The device 605, or various components thereof, may be an example of means for performing various aspects of UCI for indicating UE-initiated beam report as described herein. For example, the communications manager 620 may include a UCI manager 625, a grant manager 630, a beam management manager 635, or any combination thereof. The communications manager 620 may be an example of aspects of a communications manager 520 as described herein. In some examples, the communications manager 620, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 610, the transmitter 615, or both. For example, the communications manager 620 may receive information from the receiver 610, send information to the transmitter 615, or be integrated in combination with the receiver 610, the transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.
[0136] The communications manager 620 may support wireless communications in accordance with examples as disclosed herein. The UCI manager 625 is capable of, configured to, or operable to support a means for transmitting an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled. The grant manager 630 is capable of, configured to, or operable to support a means for monitoring for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report. The beam management manager 635 is capable of, configured to, or operable to support a means for performing the UE-initiated beam management based on a result of the monitoring for the uplink grant.
[0137] FIG. 7 shows a block diagram 700 of a communications manager 720 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. The communications manager 720 may be an example of aspects of a communications manager 520, a communications manager 620, or both, as described herein. The communications manager 720, or various components thereof, may be an example of means for performing various aspects of UCI for indicating UE-initiated beam report as described herein. For example, the communications manager 720 may include a UCI manager 725, a grant manager 730, a beam management manager 735, a multiplexing manager 740, a retransmission manager 745, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories) , may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
[0138] The communications manager 720 may support wireless communications in accordance with examples as disclosed herein. The UCI manager 725 is capable of, configured to, or operable to support a means for transmitting an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled. The grant manager 730 is capable of, configured to, or operable to support a means for monitoring for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report. The beam management manager 735 is capable of, configured to, or operable to support a means for performing the UE-initiated beam management based on a result of the monitoring for the uplink grant.
[0139] In some examples, the retransmission configuration defines the retransmission of the UCI message as being disabled. In some examples, the retransmission manager 745 is capable of, configured to, or operable to support a means for discarding the beam report based on the uplink grant not being received within a time duration from transmission of the UCI message. In some examples, the retransmission manager 745 is capable of, configured to, or operable to support a means for performing a PRACH procedure based on the uplink grant not being received within a time duration from transmission of the UCI message, where the beam report is transmitted during the PRACH procedure.
[0140] In some examples, a time duration associated with monitoring for the uplink grant is based on at least one of a number of symbols or slots or a time duration relative to the transmission of the UCI message. In some examples, the retransmission configuration defines the retransmission of the UCI message as being enabled for a threshold number of retransmissions. In some examples, the retransmission manager 745 is capable of, configured to, or operable to support a means for discarding the beam report based on the uplink grant not being received within a time duration from the transmission of the UCI message and from each retransmission of the UCI message.
[0141] In some examples, the retransmission manager 745 is capable of, configured to, or operable to support a means for performing a PRACH procedure based on the uplink grant not being received within a time duration from the transmission of the UCI message and from each retransmission of the UCI message, where the beam report is transmitted during the PRACH procedure. In some examples, a time duration associated with monitoring for the uplink grant is based on at least one of a number of symbols or slots or a time duration relative to the transmission of the UCI message. In some examples, a prohibit time is established to monitor for the uplink grant for each of the transmission of the UCI message and each retransmission of the UCI message according to the retransmission configuration.
[0142] In some examples, the multiplexing manager 740 is capable of, configured to, or operable to support a means for multiplexing the UCI message and the uplink transmission together for transmission based on an overlap between a PUCCH occasion for the UCI message and an uplink transmission from the UE. In some examples, the multiplexing manager 740 is capable of, configured to, or operable to support a means for transmitting the UCI message and the uplink transmission together according to a multiplexing configuration based on an overlap between a PUCCH occasion for the UCI message and an uplink transmission from the UE. In some examples, a single configuration for the UCI message is configured for a cell group. In some examples, the UCI message is transmitted according to the single configuration.
[0143] In some examples, multiple configurations for the UCI message are configured for a cell group, each configuration in the multiple configurations being associated with an event type related to the UE-initiated beam management. In some examples, the UCI message is transmitted according to at least one of the multiple configurations based on the event type that triggered the UE-initiated beam management. In some examples, to support performing the UE-initiated beam management, the beam management manager 735 is capable of, configured to, or operable to support a means for transmitting the beam report using the set of resources based on receiving the uplink grant.
[0144] FIG. 8 shows a diagram of a system 800 including a device 805 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. The device 805 may be an example of or include components of a device 505, a device 605, or a UE 115 as described herein. The device 805 may communicate (e.g., wirelessly) with one or more other devices (e.g., network entities 105, UEs 115, or a combination thereof) . The device 805 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 820, an input / output (I / O) controller, such as an I / O controller 810, a transceiver 815, one or more antennas 825, at least one memory 830, code 835, and at least one processor 840. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 845) .
[0145] The I / O controller 810 may manage input and output signals for the device 805. The I / O controller 810 may also manage peripherals not integrated into the device 805. In some cases, the I / O controller 810 may represent a physical connection or port to an external peripheral. In some cases, the I / O controller 810 may utilize an operating system such as or another known operating system. Additionally, or alternatively, the I / O controller 810 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I / O controller 810 may be implemented as part of one or more processors, such as the at least one processor 840. In some cases, a user may interact with the device 805 via the I / O controller 810 or via hardware components controlled by the I / O controller 810.
[0146] In some cases, the device 805 may include a single antenna. However, in some other cases, the device 805 may have more than one antenna, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 815 may communicate bi-directionally via the one or more antennas 825 using wired or wireless links as described herein. For example, the transceiver 815 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 815 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 825 for transmission, and to demodulate packets received from the one or more antennas 825. The transceiver 815, or the transceiver 815 and one or more antennas 825, may be an example of a transmitter 515, a transmitter 615, a receiver 510, a receiver 610, or any combination thereof or component thereof, as described herein.
[0147] The at least one memory 830 may include random access memory (RAM) and read-only memory (ROM) . The at least one memory 830 may store computer-readable, computer-executable, or processor-executable code, such as the code 835. The code 835 may include instructions that, when executed by the at least one processor 840, cause the device 805 to perform various functions described herein. The code 835 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 835 may not be directly executable by the at least one processor 840 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the at least one memory 830 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0148] The at least one processor 840 may include one or more intelligent hardware devices (e.g., one or more general-purpose processors, one or more DSPs, one or more CPUs, one or more graphics processing units (GPUs) , one or more neural processing units (NPUs) (also referred to as neural network processors or deep learning processors (DLPs) ) , one or more microcontrollers, one or more ASICs, one or more FPGAs, one or more programmable logic devices, discrete gate or transistor logic, one or more discrete hardware components, or any combination thereof) . In some cases, the at least one processor 840 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the at least one processor 840. The at least one processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., the at least one memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks supporting UCI for indicating UE-initiated beam report) . For example, the device 805 or a component of the device 805 may include at least one processor 840 and at least one memory 830 coupled with or to the at least one processor 840, the at least one processor 840 and the at least one memory 830 configured to perform various functions described herein.
[0149] In some examples, the at least one processor 840 may include multiple processors and the at least one memory 830 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions described herein. In some examples, the at least one processor 840 may be a component of a processing system, which may refer to a system (such as a series) of machines, circuitry (including, for example, one or both of processor circuitry (which may include the at least one processor 840) and memory circuitry (which may include the at least one memory 830) ) , or components, that receives or obtains inputs and processes the inputs to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, the at least one processor 840 or a processing system including the at least one processor 840 may be configured to, configurable to, or operable to cause the device 805 to perform one or more of the functions described herein. Further, as described herein, being “configured to, ” being “configurable to, ” and being “operable to” may be used interchangeably and may be associated with a capability, when executing code 835 (e.g., processor-executable code) stored in the at least one memory 830 or otherwise, to perform one or more of the functions described herein.
[0150] The communications manager 820 may support wireless communications in accordance with examples as disclosed herein. For example, the communications manager 820 is capable of, configured to, or operable to support a means for transmitting an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled. The communications manager 820 is capable of, configured to, or operable to support a means for monitoring for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report. The communications manager 820 is capable of, configured to, or operable to support a means for performing the UE-initiated beam management based on a result of the monitoring for the uplink grant.
[0151] By including or configuring the communications manager 820 in accordance with examples as described herein, the device 805 may support techniques for a UCI message to be transmitted-and retransmitted, in some scenarios-requesting uplink resources for transmission of a UE-initiated or event-driven beam report. These techniques may be used for UE-initiated beam management to support fast beam switching and to generally reduce the latency associated with other beam reporting techniques.
[0152] In some examples, the communications manager 820 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 815, the one or more antennas 825, or any combination thereof. Although the communications manager 820 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 820 may be supported by or performed by the at least one processor 840, the at least one memory 830, the code 835, or any combination thereof. For example, the code 835 may include instructions executable by the at least one processor 840 to cause the device 805 to perform various aspects of UCI for indicating UE-initiated beam report as described herein, or the at least one processor 840 and the at least one memory 830 may be otherwise configured to, individually or collectively, perform or support such operations.
[0153] FIG. 9 shows a flowchart illustrating a method 900 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. The operations of the method 900 may be implemented by a UE or its components as described herein. For example, the operations of the method 900 may be performed by a UE 115 as described with reference to FIGs. 1 through 8. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0154] At 905, the method may include transmitting an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled. The operations of 905 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 905 may be performed by a UCI manager 725 as described with reference to FIG. 7.
[0155] At 910, the method may include monitoring for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report. The operations of 910 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 910 may be performed by a grant manager 730 as described with reference to FIG. 7.
[0156] At 915, the method may include performing the UE-initiated beam management based on a result of the monitoring for the uplink grant. The operations of 915 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 915 may be performed by a beam management manager 735 as described with reference to FIG. 7.
[0157] FIG. 10 shows a flowchart illustrating a method 1000 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. The operations of the method 1000 may be implemented by a UE or its components as described herein. For example, the operations of the method 1000 may be performed by a UE 115 as described with reference to FIGs. 1 through 8. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0158] At 1005, the method may include transmitting an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled. The operations of 1005 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1005 may be performed by a UCI manager 725 as described with reference to FIG. 7.
[0159] At 1010, the method may include monitoring for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report. The operations of 1010 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1010 may be performed by a grant manager 730 as described with reference to FIG. 7.
[0160] At 1015, the method may include performing the UE-initiated beam management based on a result of the monitoring for the uplink grant. The operations of 1015 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1015 may be performed by a beam management manager 735 as described with reference to FIG. 7.
[0161] At 1020, the method may include transmitting the beam report using the set of resources based on receiving the uplink grant. The operations of 1020 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1020 may be performed by a beam management manager 735 as described with reference to FIG. 7.
[0162] FIG. 11 shows a flowchart illustrating a method 1100 that supports UCI for indicating UE-initiated beam report in accordance with one or more aspects of the present disclosure. The operations of the method 1100 may be implemented by a UE or its components as described herein. For example, the operations of the method 1100 may be performed by a UE 115 as described with reference to FIGs. 1 through 8. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
[0163] At 1105, the method may include transmitting an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, where the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled. The operations of 1105 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1105 may be performed by a UCI manager 725 as described with reference to FIG. 7.
[0164] At 1110, the method may include monitoring for an uplink grant based on the UCI message, where the uplink grant identifies a set of resources to be used for transmission of the beam report. The operations of 1110 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1110 may be performed by a grant manager 730 as described with reference to FIG. 7.
[0165] At 1115, the method may include multiplexing the UCI message and the uplink transmission together for transmission based on an overlap between a PUCCH occasion for the UCI message and an uplink transmission from the UE. The operations of 1115 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1115 may be performed by a multiplexing manager 740 as described with reference to FIG. 7.
[0166] At 1120, the method may include performing the UE-initiated beam management based on a result of the monitoring for the uplink grant. The operations of 1120 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1120 may be performed by a beam management manager 735 as described with reference to FIG. 7.
[0167] The following provides an overview of aspects of the present disclosure:
[0168] Aspect 1: A method for wireless communications at a UE, comprising: transmitting an UCI message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, wherein the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled; monitoring for an uplink grant based at least in part on the UCI message, wherein the uplink grant identifies a set of resources to be used for transmission of the beam report; and performing the UE- initiated beam management based at least in part on a result of the monitoring for the uplink grant.
[0169] Aspect 2: The method of aspect 1, wherein the retransmission configuration defines the retransmission of the UCI message as being disabled.
[0170] Aspect 3: The method of aspect 2, further comprising: discarding the beam report based at least in part on the uplink grant not being received within a time duration from transmission of the UCI message.
[0171] Aspect 4: The method of any of aspects 2 through 3, further comprising: performing a PRACH procedure based at least in part on the uplink grant not being received within a time duration from transmission of the UCI message, wherein the beam report is transmitted during the PRACH procedure.
[0172] Aspect 5: The method of any of aspects 2 through 4, wherein a time duration associated with monitoring for the uplink grant is based on at least one of a number of symbols or slots or a time duration relative to the transmission of the UCI message.
[0173] Aspect 6: The method of any of aspects 1 through 5, wherein the retransmission configuration defines the retransmission of the UCI message as being enabled for a threshold number of retransmissions.
[0174] Aspect 7: The method of aspect 6, further comprising: discarding the beam report based at least in part on the uplink grant not being received within a time duration from the transmission of the UCI message and from each retransmission of the UCI message.
[0175] Aspect 8: The method of any of aspects 6 through 7, further comprising: performing a PRACH procedure based at least in part on the uplink grant not being received within a time duration from the transmission of the UCI message and from each retransmission of the UCI message, wherein the beam report is transmitted during the PRACH procedure.
[0176] Aspect 9: The method of any of aspects 6 through 8, wherein a time duration associated with monitoring for the uplink grant is based on at least one of a number of symbols or slots or a time duration relative to the transmission of the UCI message.
[0177] Aspect 10: The method of any of aspects 6 through 9, wherein a prohibit time is established to monitor for the uplink grant for each of the transmission of the UCI message and each retransmission of the UCI message according to the retransmission configuration.
[0178] Aspect 11: The method of any of aspects 1 through 10, further comprising: multiplexing the UCI message and the uplink transmission together for transmission based at least in part on an overlap between a PUCCH occasion for the UCI message and an uplink transmission from the UE.
[0179] Aspect 12: The method of any of aspects 1 through 11, further comprising: transmitting the UCI message and the uplink transmission together according to a multiplexing configuration based at least in part on an overlap between a PUCCH occasion for the UCI message and an uplink transmission from the UE.
[0180] Aspect 13: The method of any of aspects 1 through 12, wherein a single configuration for the UCI message is configured for a cell group, and the UCI message is transmitted according to the single configuration.
[0181] Aspect 14: The method of any of aspects 1 through 13, wherein multiple configurations for the UCI message are configured for a cell group, each configuration in the multiple configurations being associated with an event type related to the UE-initiated beam management, and the UCI message is transmitted according to at least one of the multiple configurations based on the event type that triggered the UE-initiated beam management.
[0182] Aspect 15: The method of any of aspects 1 through 14, wherein performing the UE-initiated beam management comprises: transmitting the beam report using the set of resources based at least in part on receiving the uplink grant.
[0183] Aspect 16: A UE for wireless communications, comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to perform a method of any of aspects 1 through 15.
[0184] Aspect 17: A UE for wireless communications, comprising at least one means for performing a method of any of aspects 1 through 15.
[0185] Aspect 18: A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to perform a method of any of aspects 1 through 15.
[0186] It should be noted that the methods described herein describe possible implementations. The operations and the steps may be rearranged or otherwise modified and other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0187] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
[0188] Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0189] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general-purpose processor, a DSP, an ASIC, a CPU, a graphics processing unit (GPU) , a neural processing unit (NPU) , an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor but, in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) . Any functions or operations described herein as being capable of being performed by a processor may be performed by multiple processors that, individually or collectively, are capable of performing the described functions or operations.
[0190] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0191] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media. Any functions or operations described herein as being capable of being performed by a memory may be performed by multiple memories that, individually or collectively, are capable of performing the described functions or operations.
[0192] As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. ”
[0193] As used herein, including in the claims, the article “a” before a noun is open-ended and understood to refer to “at least one” of those nouns or “one or more” of those nouns. Thus, the terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. For example, if a claim recites “acomponent” that performs one or more functions, each of the individual functions may be performed by a single component or by any combination of multiple components. Thus, the term “acomponent” having characteristics or performing functions may refer to “at least one of one or more components” having a particular characteristic or performing a particular function. Subsequent reference to a component introduced with the article “a” using the terms “the” or “said” may refer to any or all of the one or more components. For example, a component introduced with the article “a” may be understood to mean “one or more components, ” and referring to “the component” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ” Similarly, subsequent reference to a component introduced as “one or more components” using the terms “the” or “said” may refer to any or all of the one or more components. For example, referring to “the one or more components” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ”
[0194] The term “determine” or “determining” encompasses a variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database, or another data structure) , ascertaining, and the like. Also, “determining” can include receiving (e.g., receiving information) , accessing (e.g., accessing data stored in memory) , and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.
[0195] In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label or other subsequent reference label.
[0196] The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration” and not “preferred” or “advantageous over other examples. ” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some figures, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.
[0197] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A user equipment (UE) , comprising:one or more memories storing processor-executable code; andone or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to:transmit an uplink control information (UCI) message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, wherein the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled;monitor for an uplink grant based at least in part on the UCI message, wherein the uplink grant identifies a set of resources to be used for transmission of the beam report; andperform the UE-initiated beam management based at least in part on a result of the monitoring for the uplink grant.2.The UE of claim 1, wherein the retransmission configuration defines the retransmission of the UCI message as being disabled.3.The UE of claim 2, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:discard the beam report based at least in part on the uplink grant not being received within a time duration from transmission of the UCI message.4.The UE of claim 2, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:perform a physical random-access channel (PRACH) procedure based at least in part on the uplink grant not being received within a time duration from transmission of the UCI message, wherein the beam report is transmitted during the PRACH procedure.5.The UE of claim 2, wherein a time duration associated with monitoring for the uplink grant is based on at least one of a number of symbols or slots or a time duration relative to the transmission of the UCI message.6.The UE of claim 1, wherein the retransmission configuration defines the retransmission of the UCI message as being enabled for a threshold number of retransmissions.7.The UE of claim 6, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:discard the beam report based at least in part on the uplink grant not being received within a time duration from the transmission of the UCI message and from each retransmission of the UCI message.8.The UE of claim 6, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:perform a physical random-access channel (PRACH) procedure based at least in part on the uplink grant not being received within a time duration from the transmission of the UCI message and from each retransmission of the UCI message, wherein the beam report is transmitted during the PRACH procedure.9.The UE of claim 6, wherein a time duration associated with monitoring for the uplink grant is based on at least one of a number of symbols or slots or a time duration relative to the transmission of the UCI message.10.The UE of claim 6, wherein a prohibit time is established to monitor for the uplink grant for each of the transmission of the UCI message and each retransmission of the UCI message according to the retransmission configuration.11.The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:multiplex the UCI message and the uplink transmission together for transmission based at least in part on an overlap between a physical uplink control channel (PUCCH) occasion for the UCI message and an uplink transmission from the UE.12.The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to:transmit the UCI message and the uplink transmission together according to a multiplexing configuration based at least in part on an overlap between a physical uplink control channel (PUCCH) occasion for the UCI message and an uplink transmission from the UE.13.The UE of claim 1, wherein:a single configuration for the UCI message is configured for a cell group, andthe UCI message is transmitted according to the single configuration.14.The UE of claim 1, wherein:multiple configurations for the UCI message are configured for a cell group, each configuration in the multiple configurations being associated with an event type related to the UE-initiated beam management, andthe UCI message is transmitted according to at least one of the multiple configurations based on the event type that triggered the UE-initiated beam management.15.The UE of claim 1, wherein, to perform the UE-initiated beam management, the one or more processors are individually or collectively operable to execute the code to cause the UE to:transmit the beam report using the set of resources based at least in part on receiving the uplink grant.16.A method for wireless communications at a user equipment (UE) , comprising:transmitting an uplink control information (UCI) message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, wherein the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled;monitoring for an uplink grant based at least in part on the UCI message, wherein the uplink grant identifies a set of resources to be used for transmission of the beam report; andperforming the UE-initiated beam management based at least in part on a result of the monitoring for the uplink grant.17.The method of claim 16, wherein the retransmission configuration defines the retransmission of the UCI message as being disabled.18.The method of claim 17, further comprising:discarding the beam report based at least in part on the uplink grant not being received within a time duration from transmission of the UCI message.19.The method of claim 17, further comprising:performing a physical random-access channel (PRACH) procedure based at least in part on the uplink grant not being received within a time duration from transmission of the UCI message, wherein the beam report is transmitted during the PRACH procedure.20.A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to:transmit an uplink control information (UCI) message that requests uplink resources for transmission of a beam report associated with UE-initiated beam management, wherein the UCI message is transmitted in accordance with a retransmission configuration that defines whether a retransmission of the UCI message is enabled or disabled;monitor for an uplink grant based at least in part on the UCI message, wherein the uplink grant identifies a set of resources to be used for transmission of the beam report; andperform the UE-initiated beam management based at least in part on a result of the monitoring for the uplink grant.
Citation Information
Patent Citations
UE initiated beam management procedure
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Reporting in wireless communication network
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Antenna panel switching and beam indication
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Systems and methods for user equipment initiated link management
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UE initiated beam measurement and beam reporting
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