Techniques for link adaptation of broadcast channels

Abstract

Methods, systems, and devices are described for wireless communication that provide an indication of a channel state by a user equipment (UE) that can be used to select transmit parameters for downlink broadcast transmissions. A network entity may transmit a first downlink transmission, which may be received at a UE and used to measure channel quality at the UE. The UE may transmit an uplink communication that provides an indication of the channel quality. A network device may receive the uplink communication, determine one or more transmission parameters for a broadcast downlink transmission based on the indication of the channel quality, and transmit the broadcast downlink transmission.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. patent application No. 17 / 876,940, entitled “TECHNIQUES FOR LINK ADAPTATION FOR BROADCAST CHANNELS,” filed by Abedini et al. on July 29, 2022, which is assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0003] The following relates to wireless communications, including techniques for link adaptation of broadcast channels. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and the like. These systems may be able to support communication with multiple users by sharing 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, advanced LTE (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 techniques 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 communication system may include one or more base stations, each of which supports wireless communications for communication devices, which may be referred to as user equipment (UE).

[0005] In some wireless communication systems, a UE may monitor one or more broadcast transmissions that provide information for communicating with one or more network entities. For example, a UE may monitor a synchronization system block (SSB) transmission that provides information for establishing a connection between the UE and one or more network entities. Summary of the invention

[0006] The described technology relates to improved methods, systems, devices and apparatuses for supporting link adaptation technology for broadcast channels. For example, the described technology provides an indication of a channel state that can be used to select a transmission parameter (e.g., a modulation and coding scheme (MCS), a downlink transmission power, or both) for a downlink broadcast transmission. This selection of transmission parameters can allow for efficient selection of transmission power and radio resources for downlink broadcast transmissions, thereby enhancing the efficiency of communications. In some cases, a network entity may send a first downlink transmission (e.g., a keep-alive signal, a paging early indication, a synchronization signal block, control information, or other transmission), which can be received at a user equipment (UE) and used to provide an indication of channel quality between the network entity and the UE. The UE may send an uplink communication (e.g., an uplink trigger prompting a downlink broadcast transmission from the network entity) based on the first downlink transmission, which provides an indication of channel quality. The network device may receive the uplink communication, determine one or more transmission parameters for broadcasting the downlink transmission based on the indication of channel quality, and send the downlink broadcast transmission. In some cases, a downlink broadcast transmission may have a transmit power, modulation and coding scheme, or both, selected based on an indication of channel quality.

[0007] A method for wireless communication at a user equipment (UE) is described. The method may include: receiving a first downlink transmission from a network entity; sending an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on a measured channel quality of the first downlink transmission; and receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on the channel quality indication.

[0008] An apparatus for wireless communication at a UE is described. The apparatus may include: a processor; a memory coupled to the processor; and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: receive a first downlink transmission from a network entity; send an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on a measured channel quality of the first downlink transmission; and receive a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on the channel quality indication.

[0009] Another apparatus for wireless communication at a UE is described. The apparatus may include: means for receiving a first downlink transmission from a network entity; means for transmitting an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on a measured channel quality of the first downlink transmission; and means for receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on the channel quality indication.

[0010] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: receive a first downlink transmission from a network entity; send an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on a measured channel quality of the first downlink transmission; and receive a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on the channel quality indication.

[0011] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the downlink broadcast transmission may include operations, features, components, or instructions for the following items: decoding the downlink broadcast transmission based on a modulation and coding scheme, the modulation and coding scheme being selected based on the channel quality indication. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the downlink broadcast transmission includes a remaining minimum system information (RMSI) shared channel transmission, a paging shared channel transmission, or a random access channel (RACH) response. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the uplink communication includes a trigger for an on-demand synchronization signal block (SSB) transmission or an on-demand RMSI transmission, or the uplink communication includes a paging early indication (PEI) response.

[0012] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, sending the uplink communication may include operations, features, components, or instructions for: setting an uplink transmit power for the uplink communication based on an open-loop power control technique; and sending the uplink communication using a transmit timing without an associated timing advance. Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: measuring an RSRP associated with the first downlink transmission, and wherein the channel quality indication is based on the RSRP. Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: selecting the channel quality indication from the set of available channel quality indications based on the RSRP and a set of RSRP thresholds mapped to a set of available channel quality indications.

[0013] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: selecting one or more of the following based on the channel quality indication: a sequence included in the uplink communication, a first uplink transmission resource in the uplink resources used for transmission of the uplink communication, or a target received power for the uplink communication. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, one or more measured channel quality thresholds and an associated mapping to the channel quality indication are provided to the UE in a pre-specified configuration, SI communication, SSB communication, MIB communication, control channel communication associated with the first downlink transmission, communication from a serving cell to one or more neighboring cells, or any combination thereof.

[0014] In some examples of methods, apparatuses, and non-transitory computer-readable media described herein, the channel quality indication is provided in a payload of the uplink communication. In some examples of methods, apparatuses, and non-transitory computer-readable media described herein, the payload of the uplink communication includes one or more bits of a payload field, and different bit values ​​associated with the payload field are mapped to different channel quality thresholds. In some examples of methods, apparatuses, and non-transitory computer-readable media described herein, the channel quality indication provides an interference indication based on a detected interference level associated with the first downlink transmission, and the uplink communication indicates a transmit beam associated with the UE for the downlink broadcast transmission.

[0015] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: selecting a RACH configuration based on the channel quality indication, the RACH configuration comprising one or more of a message-1 (MSG1) or message-3 (MSG3) format, a RACH preamble format, a number of repetitions of a RACH message, an MCS of the RACH message, or any combination thereof.

[0016] A method for wireless communication at a network entity is described. The method may include: sending a first downlink transmission to at least a first UE; receiving a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE; and sending a downlink broadcast transmission to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0017] An apparatus for wireless communication at a network entity is described. The apparatus may include: a processor; a memory coupled to the processor; and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: send a first downlink transmission to at least a first UE; receive a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE; and send a downlink broadcast transmission to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0018] Another apparatus for wireless communication at a network entity is described. The apparatus may include: means for sending a first downlink transmission to at least a first UE; means for receiving a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE; and means for sending a downlink broadcast transmission to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0019] A non-transitory computer-readable medium storing code for wireless communication at a network entity is described. The code may include instructions executable by a processor to: send a first downlink transmission to at least a first UE; receive a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE; and send a downlink broadcast transmission to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0020] In some examples of methods, apparatuses, and non-transitory computer-readable media described herein, sending the downlink broadcast transmission may include operations, features, components, or instructions for: encoding the downlink broadcast transmission based on a modulation and coding scheme, the modulation and coding scheme being selected based on the first channel quality indication. In some examples of methods, apparatuses, and non-transitory computer-readable media described herein, the downlink broadcast transmission includes an RMSI shared channel transmission, a paging shared channel transmission, or a RACH response. In some examples of methods, apparatuses, and non-transitory computer-readable media described herein, the first uplink communication includes a trigger for an on-demand SSB transmission or an on-demand RMSI transmission, or the first uplink communication includes a PEI response.

[0021] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, an uplink transmit power for the first uplink communication is based on an open loop power control technique, and the first uplink communication is transmitted using a transmit timing without an associated timing advance. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first channel quality indication provides an RSRP associated with the first downlink transmission. Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for configuring a set of available channel quality indicators and an associated set of RSRP thresholds mapped to the set of available channel quality indicators for the first UE.

[0022] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining the one or more transmission parameters for the downlink broadcast transmission based on one or more of the following: a sequence included in the first uplink communication, a first uplink transmission resource in the uplink resources used for the first uplink communication, or a received power of the first uplink communication. Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining one or more of a modulation and coding scheme or a downlink transmission power for the downlink broadcast transmission based on a first arrival time of the first uplink communication relative to one or more other arrival times of one or more other uplink communications from one or more other UEs. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, one or more measured channel quality thresholds and an associated mapping to the first channel quality indication are provided to the UE in a pre-specified configuration, SI communication, SSB communication, MIB communication, control channel communication associated with the first downlink transmission, communication from a serving cell to one or more neighboring cells, or any combination thereof.

[0023] In some examples of methods, apparatuses, and non-transitory computer-readable media described herein, the first channel quality indication is provided in a payload of the first uplink communication. In some examples of methods, apparatuses, and non-transitory computer-readable media described herein, the payload of the first uplink communication includes one or more bits of a payload field, and different bit values ​​associated with the payload field are mapped to different channel quality thresholds. In some examples of methods, apparatuses, and non-transitory computer-readable media described herein, the first channel quality indication also provides an interference indication based on a detected interference level associated with the first downlink transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An example of a wireless communication system supporting techniques for link adaptation of a broadcast channel in accordance with one or more aspects of the present disclosure is illustrated.

[0025] Figure 2 An example of a wireless communication system supporting techniques for link adaptation of a broadcast channel in accordance with one or more aspects of the present disclosure is illustrated.

[0026] Figure 3 An example of an uplink triggering scheme that supports techniques for link adaptation for a broadcast channel in accordance with one or more aspects of the present disclosure is illustrated.

[0027] Figure 4 An example of uplink triggered system information transmission based on supporting techniques for link adaptation of a broadcast channel according to one or more aspects of the present disclosure is illustrated.

[0028] Figure 5 An example of a process flow for techniques supporting link adaptation for a broadcast channel in accordance with one or more aspects of the present disclosure is illustrated.

[0029] Figure 6 and Figure 7 A block diagram of a device supporting techniques for link adaptation for a broadcast channel in accordance with one or more aspects of the present disclosure is shown.

[0030] Figure 8 A block diagram of a communications manager supporting techniques for link adaptation of a broadcast channel in accordance with one or more aspects of the present disclosure is shown.

[0031] Fig. 9 A diagram of a system including devices supporting techniques for link adaptation of broadcast channels is shown in accordance with one or more aspects of the present disclosure.

[0032] Fig.10 and Fig.11 A block diagram of a device supporting techniques for link adaptation for a broadcast channel in accordance with one or more aspects of the present disclosure is shown.

[0033] Fig.12 A block diagram of a communications manager supporting techniques for link adaptation of a broadcast channel in accordance with one or more aspects of the present disclosure is shown.

[0034] Fig.13 A diagram of a system including devices supporting techniques for link adaptation of broadcast channels is shown in accordance with one or more aspects of the present disclosure.

[0035] Figures 14 to 21 A flow chart illustrating a method of supporting techniques for link adaptation for a broadcast channel in accordance with one or more aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0036] Some wireless communication systems, such as fifth generation (5G) systems, may use relatively large amounts of power in some cases. For example, a system using beamforming communications may send multiple directional beams in multiple directions from a network entity such as a radio unit (RU) or a radio head. Such systems may provide information (e.g., system information providing parameters for system access) for use by user equipment (UE) to access the wireless communication system using beam scanning techniques, in which information is provided in multiple different transmissions in multiple different directions. Such beam scanning techniques may consume additional power relative to techniques that do not use beam scanning (e.g., information provided in a single omnidirectional transmission may consume less power than multiple instances of sending information in multiple different directions). In some cases, to help reduce power consumption, some information may be sent using on-demand techniques, where the information is provided in response to a request or trigger for such a transmission.

[0037] In addition, such transmissions, whether transmitted according to a periodic schedule or transmitted on demand, can be transmitted using a transmit power and a modulation and coding scheme (MCS) suitable for providing reliable decoding for all receiving devices (e.g., receiving UEs), including devices located at the edge of the coverage area of ​​the transmitting device. This may result in relatively high power consumption due to higher transmit power, relatively low decoding rate in the associated MCS, or both. As discussed, in some cases, on-demand techniques may be used, such as one or more of on-demand synchronization signal block (SSB) transmissions, on-demand remaining minimum system information (RMSI) transmissions, or paging early indicator (PEI) techniques, where SSB / RMSI / paging transmissions are provided only on beams where UEs are present. However, such techniques continue to transmit such broadcast transmissions at relatively high transmit power and relatively low decoding rates.

[0038] According to various aspects discussed herein, a technique is provided that allows a UE to send an initial uplink transmission (such as a trigger for an on-demand SSB or on-demand RMSI, or a PEI response). The initial uplink transmission may also provide an indication of the received power of a downlink signal for an associated network entity or cell at the UE. The network entity receiving the initial uplink transmission may determine the associated channel state of one or more UEs to receive the associated broadcast transmission, and adjust one or more of the MCS or transmit power of the broadcast transmission based on the determined channel state. In some cases, the UE may provide an indication of the received power at the UE by a reference signal received power (RSRP) indication quantized into two or more levels (e.g., 2, 3, or 4 RSRP levels). In some cases, RSRP may be indicated based on the resources used to send the initial uplink transmission, the transmission sequence included in the initial uplink transmission, the transmit power of the initial uplink transmission, or any combination thereof. Additionally or alternatively, a payload may be sent together with an initial uplink transmission providing an indication of the RSRP level. In some cases, the UE may be configured with RSRP levels that are mapped to uplink indications according to a pre-specified configuration, through system information, through SSBs or master information blocks (MIBs), in corresponding control channel indications (e.g., in physical downlink control channel (PDCCH) communications, in system information (e.g., in one or more system information blocks (SIBs)), in radio resource control (RRC) signaling from a serving cell to neighboring cells, or any combination thereof. In some cases, the channel quality indication may also be based on interference measurements.

[0039] Such techniques may allow for enhanced system efficiency and reduced power consumption. In some cases, a network entity may determine that a downlink transmission (e.g., an RMSI transmission or a paging transmission) may be sent at a lower power than would otherwise be used to ensure cell edge UE reception, and thus network power savings may be achieved while providing reliable communications. Additionally or alternatively, the downlink transmission may use an MCS with a higher modulation order, a higher coding rate, or both, and thus may use fewer radio resources for transmission and may enhance system efficiency while providing reliable communications.

[0040] Various aspects of the present disclosure are first described in the context of a wireless communication system. Various aspects of the present disclosure are further illustrated by and described with reference to uplink trigger signaling, process flows, apparatus diagrams, system diagrams, and flow diagrams related to techniques for link adaptation of broadcast channels.

[0041] Figure 1An example of a wireless communication system 100 that supports techniques for link adaptation for a broadcast channel according to one or more aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating according to other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.

[0042] The network entities 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may include devices in different forms or with different capabilities. In various examples, the network entities 105 may be referred to as network elements, mobility elements, radio access network (RAN) nodes, or network equipment, among other nomenclature. In some examples, the network entities 105 and the UE 115 may communicate wirelessly via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, the network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) within which the UE 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area within which the network entity 105 and the UE 115 may support signal communication according to one or more radio access technologies (RATs).

[0043] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be devices in different forms or with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communication with various types of devices, such as Figure 1 Communicate with other UEs 115 or network entities 105) as shown.

[0044] As described herein, a node of the wireless communication 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, the node may be a UE 115. As another example, the 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 other aspects of this example, the first node, the second node, and the third node may be different relative to these examples. Similarly, references to UE 115, network entity 105, apparatus, device, computing system, etc. may include disclosure of UE 115, network entity 105, apparatus, device, computing system, etc. as nodes. For example, a disclosure that UE 115 is configured to receive information from network entity 105 also discloses that the first node is configured to receive information from a second node.

[0045] In some examples, the network entities 105 may communicate with the core network 130, or with each other, or both. For example, the network entities 105 may communicate with the core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3 or other interface protocols). In some examples, the network entities 105 may communicate with each other directly (e.g., directly between the network entities 105) or indirectly (e.g., via the core network 130) via the backhaul communication links 120 (e.g., according to X2, Xn or other interface protocols). In some examples, the network entities 105 may communicate with each other via midhaul communication links 162 (e.g., according to a midhaul interface protocol) or fronthaul communication links 168 (e.g., according to a fronthaul interface protocol) or any combination thereof. The backhaul communication links 120, midhaul communication links 162 or fronthaul communication links 168 may be or include one or more wired links (e.g., electrical links, optical fiber links), one or more wireless links (e.g., radio links, wireless optical links), or other examples or various combinations thereof. UE 115 may communicate with core network 130 via communication link 155 .

[0046] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a transceiver base 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 a gigabit NodeB (any 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 terms). In some examples, the 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 physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140).

[0047] In some examples, the network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that may be configured to utilize a protocol stack that is physically or logically distributed between two or more network entities 105, such as an integrated access 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, the network entity 105 may include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (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) 180 system, or any combination thereof. The 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 transmit receive point (TRP). One or more components of the network entity 105 in the decomposed RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 of the decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0048] The functional split between CU 160, DU 165, and 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, and any combination thereof) are performed at CU 160, DU 165, or RU 170. For example, a functional split of a protocol stack may be employed between CU 160 and DU 165 such that CU 160 may support one or more layers of a protocol stack and DU 165 may support one or more different layers of a protocol stack. In some examples, CU 160 may host higher 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 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 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 the DU 165 and the 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 more different cells (e.g., via one or more RUs 170). In some cases, the functional split between CU 160 and DU 165 or between DU 165 and RU 170 can be within the protocol layer (e.g., some functions of the protocol layer can be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer are performed by different ones of CU 160, DU 165, or RU 170). CU 160 can be further functionally split into CU control plane (CU-CP) and CU user plane (CU-UP) functions. CU 160 can be connected to one or more DUs 165 via midhaul communication links 162 (e.g., F1, F1-c, F1-u), and DU 165 can be connected to one or more RUs 170 via fronthaul communication links 168 (e.g., open fronthaul (FH) interface). In some examples, midhaul communication link 162 or fronthaul communication link 168 may be implemented based on interfaces (eg, channels) between layers of a protocol stack supported by respective network entities 105 that communicate via those communication links.

[0049] In some wireless communication systems (e.g., wireless communication system 100), infrastructure and spectrum resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as donor entities or IAB donors. One or more DUs 165 or one or more RUs 170 may be controlled in part by one or more CUs 160 associated with a donor network entity 105 (e.g., a donor base station 140). One or more donor network entities 105 (e.g., IAB donors) may communicate with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120). The IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by a coupled IAB donor's DU 165. The IAB-MT may include an independent set of antennas for relaying communications with the UE 115, or may share the same antennas of the IAB node 104 (e.g., of the RU 170) for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the decomposed RAN architecture (e.g., one or more IAB nodes 104 or components of the IAB node 104) may be configured to operate according to the techniques described herein.

[0050] For example, an access network (AN) or RAN may include an access node (e.g., an IAB donor), communications between an IAB node 104, and one or more UEs 115. The IAB donor may facilitate a connection between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130). That is, the IAB donor may refer to a RAN node having a wired or wireless connection to the core network 130. The IAB donor may include a CU 160 and at least one DU 165 (e.g., and RU 170), wherein the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link). The IAB donor and the IAB node 104 may communicate via an F1 interface according to a protocol defining a signaling message (e.g., an F1 AP protocol). Additionally or alternatively, CU 160 may communicate with the core network via an interface (which may be an example of a portion of a backhaul link) and may communicate with other CUs 160 (e.g., CU 160 associated with an alternative IAB donor) via an Xn-C interface (which may be an example of a portion of a backhaul link).

[0051] An IAB node 104 may refer to a RAN node that provides IAB functionality (e.g., access, wireless self-backhaul capabilities for UE 115). DU 165 may act as a distributed scheduling node toward child nodes associated with IAB node 104, and IAB-MT may act as a scheduled node toward a parent node associated with IAB node 104. That is, an IAB donor may be referred to as a parent node that communicates with one or more child nodes (e.g., an IAB donor may relay for transmissions to UEs through one or more other IAB nodes 104). Additionally or alternatively, depending on the relay chain or configuration of the AN, an IAB node 104 may also be referred to as a parent node or child node of other IAB nodes 104. Thus, the IAB-MT entity of the IAB node 104 may provide a Uu interface for the child IAB node 104 to receive signaling from the parent IAB node 104 , and a DU interface (eg, DU 165 ) may provide a Uu interface for the parent IAB node 104 to signal to the child IAB node 104 or the UE 115 .

[0052] For example, the IAB node 104 may be referred to as a parent node supporting communications for a child IAB node or as a child IAB node associated with an IAB donor, or both. The IAB donor may include a CU 160 having a wired or wireless connection (e.g., backhaul communication link 120) to the core network 130, and may act as a parent node of the IAB node 104. For example, the DU 165 of the IAB donor may relay transmissions to the UE 115 via the IAB node 104, or may directly signal the transmissions to the UE 115, or both. The CU 160 of the IAB donor may signal the establishment of a communication link to the IAB node 104 via the F1 interface, and the IAB node 104 may schedule transmissions (e.g., transmissions relayed from the IAB donor to the UE 115) via the DU 165. That is, data may be relayed to and from the IAB node 104 via signaling via the NR Uu interface of the MT to the IAB node 104. Communications with the IAB node 104 may be scheduled by the DU 165 of the IAB donor, and communications with the IAB node 104 may be scheduled by the DU 165 of the IAB node 104 .

[0053] Where the techniques described herein are applied to the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support techniques for link adaptation of broadcast channels 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., an IAB node 104, a DU 165, a CU 160, a RU 170, a RIC 175, a SMO 180).

[0054] 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 term, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. 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, UE 115 may include or may 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 communication (MTC) device, etc., which may be implemented in various objects such as appliances or vehicles, meters, etc.

[0055] The UE 115 described herein may be capable of communicating with various types of devices such as other UEs 115 which may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc. Figure 1 shown.

[0056] The UE 115 and the network entity 105 may use resources associated with one or more carriers to wirelessly communicate with each other via one or more communication links 125 (e.g., access links). The term "carrier" may refer to a collection of RF spectrum resources having a physical layer structure defined for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of an RF spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communications with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between these devices and any portion (e.g., entity, sub-entity) of the network entity 105. For example, the terms "send," "receive," or "communicate" when referring to the network entity 105 may refer to any portion of a network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105).

[0057] In some examples, such as in a carrier aggregation configuration, a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute RF Channel Number (EARFCN)) and may be identified based on a channel raster for discovery by UE 115. A carrier may operate in a standalone mode, in which case initial acquisition and connection may be performed by UE 115 via the carrier, or a carrier may operate in a non-standalone mode, in which case the connection is anchored using a different carrier (e.g., a different carrier of the same or different radio access technology).

[0058] The communication link 125 shown in the wireless communication system 100 may include downlink transmissions (e.g., forward link transmissions) from the network entity 105 to the UE 115, uplink transmissions (e.g., return link transmissions) from the UE 115 to the network entity 105, or both, among other transmission configurations. A carrier may carry either downlink communications or uplink communications (e.g., in FDD mode), or may be configured to carry both downlink communications and uplink communications (e.g., in TDD mode).

[0059] 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 wireless communication system 100. For example, the carrier bandwidth may be one of a set of bandwidths (e.g., 1.4 megahertz (MHz), 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, 40 MHz, or 80 MHz) of a carrier of a particular radio access technology. A device (e.g., a network entity 105, a UE 115, or both) of the wireless communication system 100 may have a hardware configuration that supports communications using a particular carrier bandwidth, or may be capable of being configured to support communications using one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a network entity 105 or a UE 115 that supports concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate using a portion (e.g., a subband, a BWP) or all of a carrier bandwidth.

[0060] The signal waveform transmitted via the carrier may include 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 a resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, in which case the symbol period and the subcarrier spacing may be inversely related. The number 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), so that a relatively high number of resource elements (e.g., in the transmission duration) and a relatively high order of the modulation scheme may correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of RF spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial resources may increase the data rate or data integrity used for communication with UE 115.

[0061] The time interval for the network entity 105 or the UE 115 may be expressed in multiples of a basic time unit, which may be, for example, a sampling period T s =1 / (Δfmax ·N f ) seconds, where Δf max It can represent the supported subcarrier spacing, and N f The supported discrete Fourier transform (DFT) size may be indicated. The time intervals of the communication resources 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).

[0062] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, the frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a certain number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a certain number of symbol periods (e.g., depending on the length of the cyclic prefix appended in front of each symbol period). In some wireless communication systems 100, the time slot may be further divided into a plurality of micro time slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0063] A subframe, a time slot, a mini-time slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0064] Physical channels may be multiplexed according to various techniques in order to communicate using a carrier. Physical control channels and physical data channels may be multiplexed, for example, using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique for signaling via a downlink carrier. A control region (e.g., a control resource set (CORESET)) of a physical control channel may be defined by a set of symbol periods and may extend across a system bandwidth of a carrier or a subset of that system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of a control channel candidate may refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 , and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0065] The network entity 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with the network entity 105 (e.g., using a carrier), and may be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other identifier) ​​used to distinguish adjacent cells. In some examples, a cell may also refer to a coverage area 110 or a portion of a coverage area 110 (e.g., a sector) on which the logical communication entity operates. Depending on various factors such as the capabilities of the network entity 105, such cells may range from smaller areas (e.g., structures, subsets of structures) to larger areas. For example, a cell may be or may include a building, a subset of a building, or an external space between or overlapping coverage areas 110, and the like.

[0066] A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to UEs 115 that have service subscriptions with a network provider that supports the macro cell. A small cell may be associated with a lower power network entity 105 (e.g., a lower power base station 140) (compared to a macro cell), and the small cell may operate using the same or different (e.g., licensed, unlicensed) frequency band as the macro cell. A small cell may provide unrestricted access to UEs 115 that have service subscriptions with a network provider, or may provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a closed subscriber group (CSG), 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 one or more cells using one or more component carriers.

[0067] 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 to different types of devices.

[0068] In some examples, the network entities 105 (e.g., base stations 140, RUs 170) may be mobile and thus provide communication coverage for mobile coverage areas 110. In some examples, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other examples, overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.

[0069] The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). UE 115 may be designed to support ultra-reliable or low-latency or critical functions. Ultra-reliable communication 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.

[0070] In some examples, the UE 115 may be configured to support communication directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 in a group that are performing D2D communication may be within a coverage area 110 of a network entity 105 (e.g., a base station 140, a RU 170), which may support aspects of such D2D communication configured (e.g., scheduled) by the network entity 105. In some examples, one or more UEs 115 in such a group may be outside of the coverage area 110 of the network entity 105, or may otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system, in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, network entity 105 may facilitate scheduling of resources for D2D communications. In some other examples, D2D communications may be performed between UEs 115 without involving network entity 105.

[0071] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these items. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units), or communicate with the network via one or more network nodes (e.g., network entity 105, base station 140, RU 170) using vehicle-to-network (V2N) communication, or both.

[0072] 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 a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management of UE 115 served by a network entity 105 (e.g., a base station 140) associated with the core network 130. User IP packets may be delivered through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the IP service 150 of one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0073] The wireless communication system 100 may operate using one or more frequency bands that may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelength range is approximately one decimeter to one meter. UHF waves may be blocked or redirected by buildings and environmental features (which may be referred to as clusters), but these waves may be sufficient to penetrate structures so that macro cells provide service to UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) than communications using the lower frequencies and longer wavelengths of the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0074] The wireless communication system 100 may also operate using a super high frequency (SHF) region that may be in the range of 3 GHz to 30 GHz (also referred to as a centimeter band) or an extremely high frequency (EHF) region that uses a spectrum (e.g., from 30 GHz to 300 GHz) (also referred to as a millimeter band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between UE 115 and network entity 105 (e.g., base station 140, RU 170), and the EHF antenna of the corresponding device may be smaller and closer than the UHF antenna. In some examples, such technology may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be affected by greater attenuation and shorter range than SHF or UHF transmissions. The technology disclosed herein may be adopted across transmissions using one or more different frequency regions, and the use of frequency bands specified across these frequency regions may vary by country or regulatory agency.

[0075] The wireless communication system 100 may utilize licensed and unlicensed RF spectrum bands. For example, the wireless communication system 100 may employ license assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology using unlicensed bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band). When operating using unlicensed RF spectrum bands, devices such as network entity 105 and UE 115 may employ carrier sensing for conflict detection and avoidance. In some examples, operations performed using unlicensed bands may be based on carrier aggregation configuration in combination with component carriers (e.g., LAA) operating using licensed bands. Operations performed using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, and the like.

[0076] The network entity 105 (e.g., base station 140, RU 170) or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the network entity 105 or UE 115 may be located in 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 the network entity 105 may be located at different geographical locations. The network entity 105 may include an antenna array having a set of antenna ports of multiple rows and columns that the network entity 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming for signals sent via the antenna ports.

[0077] The network entity 105 or UE 115 may use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such a technique may be referred to as spatial multiplexing. Multiple signals may be, for example, sent by a transmitting device via different antennas or different combinations of antennas. Similarly, multiple signals may be received by a 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 for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are sent to the same receiving device; and multi-user MIMO (MU-MIMO), in which multiple spatial layers are sent to multiple devices.

[0078] 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 direct 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 signals conveyed via antenna elements of an antenna array so that some signals propagating along a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals conveyed via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of the antenna elements may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device or relative to some other orientation).

[0079] The network entity 105 or UE 115 may use beam scanning techniques as part of a beamforming operation. For example, the network entity 105 (e.g., base station 140, RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the network entity 105 along different directions. For example, the network entity 105 may send signals according to different sets of beamforming weights associated with different transmission directions. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device (such as network entity 105), or by a receiving device (such as UE 115)) beam directions for later transmission or reception by the network entity 105.

[0080] Some signals, such as data signals associated with a particular receiving device, may be sent by a transmitting device (e.g., transmitting network entity 105, transmitting UE 115) along a single beam direction (e.g., a direction associated with a receiving device (such as receiving network entity 105 or receiving UE 115)). In some examples, a beam direction associated with transmission along a single beam direction may be determined based on signals sent along one or more beam directions. For example, UE 115 may receive one or more of the signals sent by network entity 105 along different directions, and may report to network entity 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0081] In some examples, transmission by a device (e.g., by network entity 105 or 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 network entity 105 to UE 115). UE 115 may report feedback indicating 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 subbands. Network entity 105 may send a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded or non-precoded. 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 codebook, a linear combination codebook, a port selection codebook). Although these techniques are described with reference to signals sent along one or more directions by a network entity 105 (e.g., base station 140, RU 170), UE 115 may use similar techniques to send signals multiple times along different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115), or to send signals along a single direction (e.g., to send data to a receiving device).

[0082] A receiving device (e.g., UE 115) may perform receiving operations according to multiple receiving configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a receiving device (e.g., network entity 105). For example, the receiving device may perform reception according to multiple receiving directions by: receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receiving beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or processing received signals according to different receiving 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 receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). A 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 the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0083] The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication at the bearer or PDCP layer may be IP-based. The RLC layer may perform packet segmentation and reassembly to communicate via logical channels. The MAC layer may perform priority processing and multiplexing of logical channels to transport channels. The MAC layer may also implement error detection techniques, error correction techniques, or both to support retransmission to improve link efficiency. In the control plane, the RRC layer may provide the establishment, configuration, and maintenance of an RRC connection that supports a radio bearer for user plane data between the UE 115 and the network entity 105 or the core network 130. The PHY layer may map a transport channel to a physical channel.

[0084] According to various aspects discussed herein, UE 115 may provide an indication of a channel state that may be used to select a transmit parameter (e.g., MCS, downlink transmit power, or both) for a downlink broadcast transmission from network entity 105. In some cases, network entity 105 may send a first downlink transmission (e.g., a keep alive signal, PEI, SSB, control information, or other transmission), which may be received at UE 115 and used to determine an estimate of a channel state (e.g., an RSRP value measured from the first downlink transmission). UE 115 may send an uplink communication (e.g., an uplink trigger prompting a downlink broadcast transmission) based on the first downlink transmission, which provides an indication of a channel state. Network device 105 may receive the uplink communication, determine one or more transmit parameters for broadcasting a downlink transmission, and send a downlink broadcast transmission. In some cases, the downlink broadcast transmission may have a transmit power, MCS, or both selected based on the indication of the channel state.

[0085] Figure 2 An example of a wireless communication system 200 that supports link adaptation techniques for broadcast channels according to one or more aspects of the present disclosure is illustrated. As illustrated, the wireless communication system 200 may include a UE 115-a and a network entity 105-a, which may be as described above with reference to Figure 1 1 and 1 . The wireless communication system 200 may also include a downlink 205 and an uplink 210. The network entity 105-a may use the downlink 205 to transmit control and / or data information to the UE 115-a. And the UE 115-a may use the uplink 210 to transmit control and / or data information to the network entity 105-a. In some cases, the downlink 205 may use different time and / or frequency resources than the uplink 210.

[0086] In some cases, the network entity 105-a may send one or more broadcast transmissions 225 via the downlink 205. Such broadcast transmissions 225 may be used to provide information to multiple UEs 115 that may be in the coverage area of ​​the network entity 105-a. In some cases, some broadcast channels may have a relatively large impact on power consumption at the network entity 105-a and have an impact on system overhead (e.g., may reduce the capacity of other transmissions). For example, RMSI physical downlink shared channel (PDSCH) transmissions, other system information PDSCH transmissions, and paging PDSCH transmissions may be sent using beam scanning techniques so that multiple instances of information provided via these transmissions may be sent via multiple different beams and such multiple transmissions consume power. In addition, the MCS of these channels may be selected by the network entity 105-a based on the coverage to be provided. For example, the network entity 105-a may select an MCS that can provide successful reception at a given target signal to interference plus noise ratio (SINR), which may be approximately the expected coverage distance. In many cases, the selected MCS may have a relatively low modulation order and coding rate in order to provide sufficient reliability for cell-edge UEs 115 .

[0087] In some cases, the network entity 105-a and the UE 115-a may use one or more procedures to reduce power consumption, overhead, or both associated with the broadcast transmission 225, such as an on-demand technique, in which the network entity 105-a may send a first downlink transmission 215 (e.g., a keep-alive signal, SSB, PEI, or any combination thereof). The UE 115-a may send an uplink transmission 220 based on the first downlink transmission 215, which triggers a subsequent downlink broadcast transmission 225. In this way, the amount of downlink broadcast transmission 225 sent may be reduced relative to a case where the network entity 105-a transmits using beam scanning across multiple configured beams at each opportunity for transmission of the downlink broadcast transmission 225. According to various aspects discussed herein, the uplink transmission 220 that triggers the downlink broadcast transmission 225 may provide an indication of a channel quality or channel state that can be measured at the UE 115-a based on the first downlink transmission 215. In some cases, the network entity 105-a may use the indicated channel quality or channel state to select transmit power, MCS, or both for one or more subsequent downlink broadcast transmissions 225, which may provide power reduction, overhead reduction, or both by providing the downlink broadcast transmission 225 with transmit parameters that are suitable for the channel conditions of the UE 115 that is to receive the downlink broadcast transmission 225.

[0088] In some cases, the uplink transmission 220 may provide approximate channel state feedback (e.g., a "rough" channel state) that may be used at the network entity 105-a to select the MCS, transmit power, or both of an upcoming downlink broadcast transmission 225 (e.g., a broadcast PDSCH) accordingly. In some cases, the power consumption and overhead of the downlink broadcast transmission 225 may be reduced relative to the value that would otherwise be used to provide reliable coverage to the cell edge UEs 115. For example, one or more UEs 115 may transmit associated uplink transmissions 220 that indicate that the corresponding channel state has relatively good channel conditions (e.g., because no UE 115 is at the cell edge). The network entity 105-a may then use an MCS and transmit power appropriate for such relatively good channel conditions for the associated downlink broadcast transmissions.

[0089] In some cases, the uplink transmission 220 may be a low complexity signal transmitted when the UE 115-a is in an idle or inactive mode, and no closed-loop power or timing control techniques are used. In some cases, the signal provided in the uplink transmission 220 may be based on a random access channel (RACH) preamble or a sounding reference signal (SRS) sequence. In some cases, the uplink transmission 220 may provide an indication of the RSRP measured by the UE 115-a for the first downlink transmission 215. In some cases, the first downlink transmission 215 may include a reference signal that can be used to measure the RSRP. For example, the first downlink transmission 215 may be a keep-alive signal including a reference signal, the first downlink transmission 215 may be an SSB that allows synchronization signal measurement to determine RSRP, the first downlink transmission 215 may be a PEI with a demodulation reference signal (DMRS), or the first downlink transmission 215 may be a PDCCH with an associated DMRS. In some cases, two or more ranges of RSRP may be quantized via one or more thresholds, and the associated RSRP levels may be indicated by the uplink transmission 220. In some cases, the indication of the associated RSRP levels may be indicated by selecting a sequence to be transmitted in the uplink transmission 220, such as by selecting a RACH preamble ID that maps to an RSRP level (e.g., different subsets of RACH preamble IDs may be associated with different RSRP levels), by selecting a cyclic shift amount for the uplink transmission 220 (e.g., different cyclic shifts may be associated with different RSRP levels), by selecting a specific uplink resource for transmitting the uplink transmission 220 (e.g., different uplink resources may be associated with different RSRP levels), by selecting a specific timing (e.g., in time and / or frequency) for the uplink transmission 220 (e.g., different transmission timings may be associated with different RSRP levels), by selecting a transmit power for the uplink transmission 220, or any combination thereof.

[0090] In some cases where the transmit power for uplink transmission 220 is used (alone or in combination with one or more other parameters) to indicate an RSRP level, the uplink transmit power may be selected based on the measured RSRP and the configured target received power, such that a UE 115 closer to the network entity 105-a transmits using a lower power, while a UE 115 further away from the network entity 105-a transmits using a higher power. In some cases, the target received power may be selected such that the received power may implicitly carry some information, such as an RSRP indication. In some cases, to avoid strong uplink signals overpowering weaker uplink signals, the target received power may be configured such that a higher target received power is provided at the network entity for uplink signals from UEs 115 having lower RSRP values. In other words, multiple target received powers may be defined and associated with different RSRP levels / thresholds, such that a higher target received power is associated with a lower measured RSRP level. Such techniques may provide that the downlink broadcast transmission 225 is transmitted using an enhanced MCS (e.g., in terms of energy efficiency) and transmit power that provide reliable communication for the lowest indicated RSRP value, and setting the target received power in such a manner as to enhance the likelihood that the uplink transmission 220 associated with the weakest measured RSRP will be detectable at the network entity 105-a.

[0091] In some cases, the uplink transmission 220 may be sent without a timing advance applied by the UE 115-a. In such cases, a signal from a UE 115 at a greater distance from the network entity 105-a will arrive later than a signal from a closer UE 115. In some cases, a receiver associated with the network entity 105-a may estimate the receive timing (e.g., via a correlator process) and may associate different receive timings with different coverage distances or areas. In some cases, the network entity 105-a may select an MCS and transmit power for the downlink broadcast transmission 225 based on the identified coverage distance or area.

[0092] In some cases, the UE 115-a may be configured with one or more RSRP thresholds or levels and a mapping from different RSRP thresholds or levels to different uplink transmission 220 parameters indicating RSRP. In some cases, the UE 115-a may be configured according to a set of pre-configured or specified RSRP thresholds and associated uplink transmission 220 parameters. In some cases, the UE 115-a may receive configuration information (e.g., from the network entity 105-a) with one or more RSRP thresholds or levels and corresponding uplink transmission 220 parameters, such as via system information signaling (e.g., in a system information block (SIB) for PEI response (PEI-R)), via an SSB or MIB such as for on-demand RMSI, via a corresponding PDCCH (e.g., for PEI-R and on-demand RMSI), via system information or dedicated RRC transmitted by a serving cell for one or more neighboring cells, or any combination thereof.

[0093] Additionally or alternatively, the uplink transmission 220 may include a preamble (e.g., based on a RACH preamble) and a payload (e.g., a PUSCH payload), wherein the payload provides feedback information related to channel quality. In such cases, more detailed channel feedback may be provided to allow more accurate tuning of the downlink broadcast transmission 225 parameters. In addition, in the case where interference may exist (e.g., in the case of a full-duplex network entity 105-a or flexible / dynamic TDD), and the indicated channel quality metric may be based on an interference measurement (e.g., defined based on an SINR level or an interference or cross-link interference (CLI) level). Additionally or alternatively, the techniques discussed herein may be used for RACH messages, such as a random access response (RAR) message (e.g., MSG2). In addition, in some cases, the techniques discussed herein may be used to request repetitions of one or more associated downlink broadcast transmissions 225. For example, in case uplink transmission 220 is an uplink trigger for on-demand SSB or on-demand RMSI, uplink transmission 220 may also be used to select configuration for RACH MSG1 and MSG3 (e.g., in terms of repetition, RACH preamble format, MCS of MSG3).

[0094] Figure 3 An example of an uplink triggering scheme 300 that supports techniques for link adaptation for a broadcast channel in accordance with one or more aspects of the present disclosure is illustrated. Figure 3 It can be a reference such as Figure 1 and Figure 2 Examples of on-demand SSB or RMSI schemes discussed. For example, Figure 3An uplink triggering scheme 300 is illustrated in which an uplink transmission indicating channel information for a UE assists in selecting transmission parameters for one or more downlink broadcast transmissions.

[0095] In this example, a network entity (eg, network entity 105) may send a periodic downlink transmission 305, which may be an example of a first downlink transmission. Figure 3 In the example of , the periodic downlink transmission 305 can be a keep-alive signal (KAS) transmission with a periodicity 315 of 20ms. KAS can be a simple downlink reference signal that carries no information or very little information, and therefore can consume relatively few resources and relatively low power. For example, KAS can be an independent primary synchronization signal (PSS) with an associated identifier. If the UE detects a downlink transmission 305 and is seeking to establish a connection, the UE can send an uplink transmission 310 in an uplink resource associated with the detected instance of the downlink transmission 305. For example, the uplink transmission 310 can be an uplink trigger (ULT), which is sent to trigger the transmission of SSB, RMSI, or both. In some cases, the ULT can be a simple uplink signal (e.g., a preamble transmission such as a RACH preamble). In some cases, the ULT can provide an indication of the channel quality measured at the UE for the downlink transmission 305 to the network entity, which can be used to select one or more transmission parameters for subsequent downlink broadcast transmissions. Furthermore, the network entity may use the detected transmission direction of the ULT to identify one or more beams that may be used to transmit one or more subsequent downlink broadcast transmissions.

[0096] Based on the ULT, at 320, the network entity may determine that one or more UEs are present and will receive a downlink broadcast transmission. In this example, the ULT may trigger the network entity to transmit an SSB 325 and an RMSI 330. As discussed, the SSB 325 and the RMSI 330 may be transmitted using one or more transmission parameters based on the channel quality indication provided by the uplink transmission 310. The network entity may also activate associated RACH resources 335 and may monitor for RACH transmissions (e.g., from a direction associated with the uplink transmission 310). In this example, the SSB 325 and the RMSI 330 and the associated RACH resources 335 may have a periodicity (e.g., a 20 ms periodicity, which may be aligned with the periodicity of the KAS transmission).

[0097] Figure 4 An example of uplink trigger 400 based system information transmission that supports techniques for link adaptation for broadcast channels in accordance with one or more aspects of the present disclosure is illustrated. Figure 4 It can be a reference such as Figures 1 to 3An example of an on-demand system information (e.g., RMSI) scheme is discussed. For example, Figure 4 An uplink triggering scheme 400 is illustrated that may support an uplink transmission indicating channel information for a UE that facilitates selection of transmission parameters for one or more downlink broadcast transmissions.

[0098] In this example, the network entity 105-b may send periodic SSB transmissions 415, monitor uplink transmissions 420, and if an uplink trigger is detected, send an associated system information transmission 425. Figure 4 In an example of , a first instance 405 of the procedure may result in the network entity 105-b not detecting an uplink trigger transmission, and a second instance 410 of the procedure may result in the network entity 105-b detecting an uplink trigger from the UE 115-b. For example, in the first instance 405, the network entity 105-b may perform an SSB scan 430-a, in which the SSBs are transmitted using multiple different SSB transmit beams 445-a. The network entity 105-b may then monitor for an uplink trigger (ULT) in a ULT scan 435-a, in which a receiving component at the network entity 105-b is configured by the network entity 105-b using parameters (e.g., quasi co-location (QCL) parameters) corresponding to beamforming parameters of the SSB transmit beam 445-a to identify the ULT via a receive beam 450-a. In this example, the first instance 405 does not include any such ULT, and thus the network entity 105-b does not send any system information transmission 425 using one or more system information beams 455-a in the RMSI scan 440-a. Therefore, network power savings can be achieved by sending the system information transmission 425 only in the event that a ULT is received. Although this example illustrates a ULT for RMSI, the techniques discussed herein may be used in other situations where a ULT may be used to initiate an associated downlink transmission, such as a ULT used to trigger RMSI based on a transmitted control resource set (CORESET) (e.g., a CORESET0 transmission that provides control information for system information block (SIB1) scheduling), or a ULT used to trigger an enhanced RMSI based on an enhanced RMSI indication in the control information (e.g., in CORESET0). In addition, the techniques discussed herein may be used in conjunction with a paging early indication response (PEI-R) to locate the spatial direction of UE 115-b, where the PEI-R may provide two spatial directions (e.g., based on the PEI-R response timing at which the PEI-R is received and the indication provided by the PEI-R regarding the associated channel quality).

[0099] continue Figure 4In the example of , the second instance 405 may perform an SSB scan 430-b, where the SSB is again transmitted using multiple different SSB transmit beams 445-b. In this example, the UE 115-b may monitor the SSB via the UE receive beam 460 in a beam scanning procedure. The UE 115-b may detect the SSB with the highest receive power on the first UE receive beam 460-a. As part of the ULT scan 435-b, the UE 115-b may transmit the ULT via the first UE transmit beam 465 corresponding to the first UE receive beam 460-a. When monitoring the ULT via the receive beam 450-b in the ULT scan 435-b, the network entity 105-b may detect the ULT from the UE 115-b via the corresponding receive beam 450-b-1. According to various aspects discussed herein, the ULT from the UE 115-b may provide an indication of the channel quality measured at the UE 115-b (e.g., according to the reference Figure 2 One or more of the techniques discussed). Based on the received ULT and the indicated channel quality, the network entity 105-b may use the system information beam 455-b corresponding to the receive beam 450-b-1 on which the ULT was detected in the RMSI scan 440-b to send a system information transmission 425, which may be received at the UE 115-b via the UE receive beam 470. Therefore, network power savings can be achieved by sending the system information transmission 425 only on the system information beam 455-b associated with the detected ULT (and on any other system information beam 455 if other ULTs are detected). In addition, by setting the transmission parameters for the system information transmission 425 based on the channel quality indicated by the ULT from the UE 115-b, network power savings and system reliability and efficiency can be increased. For example, if the ULT indicates relatively good channel quality, a lower transmit power may be used for the corresponding system information transmission 425, a higher decoding rate may be used for the corresponding system information transmission 425, a higher modulation order may be used for the corresponding system information transmission 425, or any combination thereof.

[0100] Figure 5 An example of a process flow 500 for supporting link adaptation techniques for a broadcast channel in accordance with one or more aspects of the present disclosure is illustrated. The process flow 500 may include reference Figures 1 to 4 For example, process flow 500 may illustrate communication between UE 115-c and network entity 105-c, which may be reference Figures 1 to 4Examples of corresponding devices described. The following alternative examples may be implemented in which some of the steps are performed in a different order than described or not performed at all. In some cases, the steps may include additional features not mentioned below, or further steps may be added.

[0101] At 505, the network entity 105-c may send configuration information, and the UE 115-c may receive the configuration information. In some cases, the configuration information may include: one or more RSRP thresholds or levels; and a mapping from different RSRP thresholds or levels to different uplink transmission parameters for uplink transmissions indicating the measured RSRP. In some cases, the configuration information may indicate one or more RSRP thresholds or levels and corresponding uplink transmission parameters, such as via system information signaling (e.g., in a SIB for PEI-R), via an SSB or MIB (such as for on-demand RMSI), via a corresponding PDCCH (e.g., for PEI-R and on-demand RMSI), via system information transmitted by a serving cell for one or more neighboring cells or a dedicated RRC, or any combination thereof.

[0102] At 510, the network entity 105-c may send one or more downlink transmissions and the UE 115-c may receive one or more downlink transmissions. Such downlink transmissions may include, for example, an SSB as part of an SSB scan, downlink control information (e.g., CORESET0), a PEI, or one or more keep-alive signals.

[0103] At 515, the UE 115-c may determine to send an uplink transmission, such as an uplink trigger. In some cases, the UE 115-c may make such a determination based on data present in an uplink buffer at the UE 115-c or based on the received PEI. At 520, the UE 115-c may measure one or more channel characteristics associated with the received downlink transmission. For example, the UE 115-c may measure the RSRP of a reference signal included in the downlink transmission. In some cases, additionally or alternatively, the UE 115-c may measure interference associated with the downlink transmission (e.g., SINR in the case of full-duplex communication used at the network entity 105-c or the UE 115-c).

[0104] At 525, the UE 115-c may determine one or more uplink transmit parameters for an associated uplink transmission based on the downlink channel measurements in accordance with techniques as discussed herein. For example, the UE 115-c may determine an uplink transmit power, a bit sequence, an uplink resource, or any combination thereof based on the downlink channel measurements.

[0105] At 530, UE 115-c may send an uplink transmission. In some cases, the uplink transmission may be an uplink trigger (e.g., to trigger an on-demand SSB or on-demand RMSI), or may be a PEI-R. At 535, network entity 105-c may determine one or more downlink broadcast transmission parameters based on the received uplink transmission from UE 115-c and any other associated uplink transmissions from other UEs. In some cases, network entity 105-c may determine one or more of a downlink transmit power, an MCS for a downlink broadcast transmission, or any combination thereof. At 540, network entity 105-c may send a downlink broadcast transmission to UE 115-c and any other UEs that are to receive the downlink broadcast transmission.

[0106] Figure 6 A block diagram 600 of a device 605 supporting techniques for link adaptation of a broadcast channel according to one or more aspects of the present disclosure is shown. The device 605 may be an example of aspects of a UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communication manager 620. The device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0107] The receiver 610 may provide means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels related to techniques for link adaptation of broadcast channels, data channels, information channels). The information may be passed to other components of the device 605. The receiver 610 may utilize a single antenna or a collection of multiple antennas.

[0108] The transmitter 615 may provide 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 related to techniques for link adaptation of broadcast channels, data channels, information channels). In some examples, the transmitter 615 may be co-located with the receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a collection of multiple antennas.

[0109] The communication manager 620, the receiver 610, the transmitter 615, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of the techniques for link adaptation of broadcast channels as described herein. For example, the communication manager 620, the receiver 610, the transmitter 615, or various combinations thereof, or components thereof, may support methods for performing one or more of the functions described herein.

[0110] In some examples, the communication manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include 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 components, discrete hardware components, or any combination thereof that is configured to or otherwise supports components for performing the functions described in the present disclosure. In some examples, the processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0111] Additionally or alternatively, in some examples, the communication manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be performed by a general purpose processor (e.g., configured as or otherwise supporting components for performing the functions described in the present disclosure), a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices.

[0112] In some examples, communication manager 620 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise cooperating with receiver 610, transmitter 615, or both. For example, communication manager 620 may receive information from receiver 610, transmit information to transmitter 615, or be integrated in conjunction with receiver 610, transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.

[0113] According to examples as disclosed herein, the communication manager 620 may support wireless communications at the UE. For example, the communication manager 620 may be configured to or otherwise support components for receiving a first downlink transmission from a network entity. The communication manager 620 may be configured to or otherwise support components for sending an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on the measured channel quality of the first downlink transmission. The communication manager 620 may be configured to or otherwise support components for receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on the channel quality indication.

[0114] Additionally or alternatively, according to examples as disclosed herein, the communication manager 620 may support wireless communications at a network entity. For example, the communication manager 620 may be configured as or otherwise support components for sending a first downlink transmission to at least a first UE. The communication manager 620 may be configured as or otherwise support components for receiving a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE. The communication manager 620 may be configured as or otherwise support components for sending a downlink broadcast transmission to at least a first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0115] By including or configuring a communication manager 620 according to examples as described herein, the device 605 (e.g., a processor controlling or otherwise coupled to the receiver 610, the transmitter 615, the communication manager 620, or a combination thereof) may support techniques for broadcast channel link adaptation that provide enhanced system efficiency, reduced overhead, reduced power consumption, or any combination thereof while providing reliable communications.

[0116] Figure 7 A block diagram 700 of a device 705 supporting techniques for link adaptation of a broadcast channel according to one or more aspects of the present disclosure is shown. The device 705 may be an example of aspects of the device 605 or UE 115 as described herein. The device 705 may include a receiver 710, a transmitter 715, and a communication manager 720. The device 705 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0117] The receiver 710 may provide means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels related to techniques for link adaptation of broadcast channels, data channels, information channels). The information may be passed to other components of the device 705. The receiver 710 may utilize a single antenna or a collection of multiple antennas.

[0118] The transmitter 715 may provide means for transmitting signals generated by other components of the device 705. For example, the transmitter 715 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels related to techniques for link adaptation of broadcast channels, data channels, information channels). In some examples, the transmitter 715 may be co-located with the receiver 710 in a transceiver module. The transmitter 715 may utilize a single antenna or a collection of multiple antennas.

[0119] The device 705 or its various components may be examples of components for performing various aspects of the techniques for link adaptation of broadcast channels as described herein. For example, the communication manager 720 may include a channel measurement manager 725, a measurement indication manager 730, a broadcast communication manager 735, or any combination thereof. The communication manager 720 may be an example of various aspects of the communication manager 620 as described herein. In some examples, the communication manager 720 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with the receiver 710, the transmitter 715, or both. For example, the communication manager 720 may receive information from the receiver 710, transmit information to the transmitter 715, or be integrated with the receiver 710, the transmitter 715, or both to obtain information, output information, or perform various other operations as described herein.

[0120] According to examples as disclosed herein, the communication manager 720 may support wireless communications at the UE. The channel measurement manager 725 may be configured to or otherwise support components for receiving a first downlink transmission from a network entity. The measurement indication manager 730 may be configured to or otherwise support components for sending an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on the measured channel quality of the first downlink transmission. The broadcast communication manager 735 may be configured to or otherwise support components for receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on the channel quality indication.

[0121] Additionally or alternatively, according to examples as disclosed herein, the communication manager 720 may support wireless communications at a network entity. The broadcast communication manager 735 may be configured as or otherwise support a component for sending a first downlink transmission to at least a first UE. The measurement indication manager 730 may be configured as or otherwise support a component for receiving a first uplink communication from a first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE. The broadcast communication manager 735 may be configured as or otherwise support a component for sending a downlink broadcast transmission to at least a first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0122] Figure 8A block diagram 800 of a communication manager 820 supporting techniques for link adaptation of a broadcast channel in accordance with one or more aspects of the present disclosure is shown. The communication manager 820 may be an example of aspects of the communication manager 620, the communication manager 720, or both as described herein. The communication manager 820 or its various components may be examples of components for performing various aspects of the techniques for link adaptation of a broadcast channel as described herein. For example, the communication manager 820 may include a channel measurement manager 825, a measurement indication manager 830, a broadcast communication manager 835, a transmit power manager 840, an interference measurement manager 845, a RACH configuration manager 850, an MCS manager 855, an uplink trigger manager 860, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

[0123] According to examples as disclosed herein, the communication manager 820 may support wireless communications at the UE. The channel measurement manager 825 may be configured to or otherwise support components for receiving a first downlink transmission from a network entity. The measurement indication manager 830 may be configured to or otherwise support components for sending an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on the measured channel quality of the first downlink transmission. The broadcast communication manager 835 may be configured to or otherwise support components for receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on the channel quality indication.

[0124] In some examples, to support receiving downlink broadcast transmissions, the broadcast communications manager 835 may be configured to or otherwise support components for decoding downlink broadcast transmissions based on a modulation and coding scheme selected based on a channel quality indication. In some examples, the downlink broadcast transmission includes a RMSI shared channel transmission, a paging shared channel transmission, or a RACH response. In some examples, the uplink communication includes a trigger for an on-demand SSB transmission or an on-demand RMSI transmission, or the uplink communication includes a PEI response.

[0125] In some examples, to support transmitting uplink communications, the transmit power manager 840 may be configured to or otherwise support components for setting uplink transmit power for uplink communications based on an open loop power control technique. In some examples, to support transmitting uplink communications, the transmit power manager 840 may be configured to or otherwise support components for transmitting uplink communications using a transmit timing without an associated timing advance. In some examples, the channel measurement manager 825 may be configured to or otherwise support components for measuring RSRP associated with the first downlink transmission, and wherein the channel quality indication is based on RSRP. In some examples, the measurement indication manager 830 may be configured to or otherwise support components for selecting a channel quality indication from a set of available channel quality indications based on RSRP and a set of RSRP thresholds mapped to the set of available channel quality indications.

[0126] In some examples, the measurement indication manager 830 may be configured to or otherwise support a component for selecting one or more of the following based on a channel quality indication: a sequence included in an uplink communication, a first uplink transmission resource in an uplink resource for transmission of an uplink communication, or a target received power for an uplink communication. In some examples, one or more measured channel quality thresholds and an associated mapping to a channel quality indication are provided to the UE in a pre-specified configuration, a system information communication, an SSB communication, a MIB communication, a control channel communication associated with a first downlink transmission, a communication from a serving cell to one or more neighboring cells, or any combination thereof. In some examples, the channel quality indication is provided in a payload of an uplink communication. In some examples, the payload of the uplink communication includes one or more bits of a payload field, and different bit values ​​associated with the payload field are mapped to different channel quality thresholds. In some examples, the channel quality indication provides an interference indication based on a detected interference level associated with the first downlink transmission. In some examples, an uplink communication indicates a transmit beam associated with the UE for downlink broadcast transmission.

[0127] In some examples, the RACH configuration manager 850 may be configured to or otherwise support components for selecting a RACH configuration based on a channel quality indication, the RACH configuration including one or more of a message-1 (MSG1) or message-3 (MSG3) format, a RACH preamble format, a number of repetitions of a RACH message, a modulation and coding scheme (MCS) of a RACH message, or any combination thereof.

[0128] Additionally or alternatively, according to examples as disclosed herein, the communication manager 820 may support wireless communications at a network entity. In some examples, the broadcast communication manager 835 may be configured as or otherwise support a component for sending a first downlink transmission to at least a first UE. In some examples, the measurement indication manager 830 may be configured as or otherwise support a component for receiving a first uplink communication from a first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of a first downlink transmission at the first UE. In some examples, the broadcast communication manager 835 may be configured as or otherwise support a component for sending a downlink broadcast transmission to at least a first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0129] In some examples, to support sending a downlink broadcast transmission, the MCS manager 855 may be configured to or otherwise support a component for encoding the downlink broadcast transmission based on a modulation and coding scheme, which is selected based on the first channel quality indication. In some examples, the downlink broadcast transmission includes an RMSI shared channel transmission, a paging shared channel transmission, or a RACH response. In some examples, the first uplink communication includes a trigger for an on-demand SSB transmission or an on-demand RMSI transmission, or the first uplink communication includes a PEI response. In some examples, the uplink transmit power for the first uplink communication is based on an open-loop power control technique, and the first uplink communication is sent using a transmit timing without an associated timing advance.

[0130] In some examples, the first channel quality indication provides an RSRP associated with the first downlink transmission. In some examples, the measurement indication manager 830 may be configured to or otherwise support components for configuring a set of available channel quality indicators and an associated set of RSRP thresholds mapped to the set of available channel quality indicators for the first UE. In some examples, the measurement indication manager 830 may be configured to or otherwise support components for determining one or more transmission parameters for a downlink broadcast transmission based on one or more of the following: a sequence included in the first uplink communication, a first uplink transmission resource in an uplink resource used for the first uplink communication, or a received power of the first uplink communication.

[0131] In some examples, the MCS manager 855 may be configured to or otherwise support a component for determining one or more of a modulation and coding scheme or a downlink transmission power for a downlink broadcast transmission based on a first arrival time of a first uplink communication relative to one or more other arrival times of one or more other uplink communications from one or more other UEs. In some examples, one or more measured channel quality thresholds and an associated mapping to a first channel quality indication are provided to the UE in a pre-specified configuration, system information communication, SSB communication, MIB communication, control channel communication associated with the first downlink transmission, communication from a serving cell to one or more neighboring cells, or any combination thereof. In some examples, the first channel quality indication is provided in a payload of the first uplink communication. In some examples, the payload of the first uplink communication includes one or more bits of a payload field, and different bit values ​​associated with the payload field are mapped to different channel quality thresholds. In some examples, the first channel quality indication also provides an interference indication based on a detected interference level associated with the first downlink transmission.

[0132] Fig. 9 A diagram of a system 900 including a device 905 supporting techniques for link adaptation for a broadcast channel according to one or more aspects of the present disclosure is shown. The device 905 may be an example of a device 605, a device 705, or a UE 115 as described herein or include components thereof. The device 905 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. The device 905 may include components for two-way voice and data communications, including components for sending and receiving communications, such as a communication manager 920, an input / output (I / O) controller 910, a transceiver 915, an antenna 925, a memory 930, a code 935, and a processor 940. These components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 945).

[0133] I / O controller 910 may manage input and output signals for device 905. I / O controller 910 may also manage peripheral devices that are not integrated into device 905. In some cases, I / O controller 910 may represent a physical connection or port to an external peripheral device. In some cases, I / O controller 910 may utilize an operating system, such as or another known operating system. Additionally or alternatively, I / O controller 910 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 910 may be implemented as part of a processor (such as processor 940). In some cases, a user may interact with device 905 via I / O controller 910 or via hardware components controlled by I / O controller 910.

[0134] In some cases, the device 905 may include a single antenna 925. However, in some other cases, the device 905 may have more than one antenna 925, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 915 may communicate bidirectionally via one or more antennas 925, wired or wireless links, as described herein. For example, the transceiver 915 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 915 may also include a modem for: modulating packets; providing the modulated packets to one or more antennas 925 for transmission; and demodulating packets received from one or more antennas 925. The transceiver 915 or the transceiver 915 and one or more antennas 925 may be examples of transmitters 615, transmitters 715, receivers 610, receivers 710, or any combination thereof or components thereof as described herein.

[0135] The memory 930 may include random access memory (RAM) and read-only memory (ROM). The memory 930 may store computer-readable, computer-executable code 935 including instructions that, when executed by the processor 940, cause the device 905 to perform various functions described herein. The code 935 may be stored in a non-transitory computer-readable medium, such as a system memory or another type of memory. In some cases, the code 935 may not be directly executable by the processor 940, but (for example, when compiled and executed) may cause the computer to perform the functions described herein. In some cases, in addition to this, the memory 930 may also include a basic I / O system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0136] The processor 940 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 940 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 940. The processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., a memory 930) so that the device 905 performs various functions (e.g., functions or tasks that support techniques for link adaptation of broadcast channels). For example, the device 905 or a component of the device 905 may include a processor 940 and a memory 930 coupled to or coupled to the processor 940, and the processor 940 and the memory 930 are configured to perform the various functions described herein.

[0137] According to examples as disclosed herein, the communication manager 920 may support wireless communications at the UE. For example, the communication manager 920 may be configured to or otherwise support components for receiving a first downlink transmission from a network entity. The communication manager 920 may be configured to or otherwise support components for sending an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on the measured channel quality of the first downlink transmission. The communication manager 920 may be configured to or otherwise support components for receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on the channel quality indication.

[0138] Additionally or alternatively, according to examples as disclosed herein, the communication manager 920 may support wireless communications at a network entity. For example, the communication manager 920 may be configured as or otherwise support a component for sending a first downlink transmission to at least a first UE. The communication manager 920 may be configured as or otherwise support a component for receiving a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE. The communication manager 920 may be configured as or otherwise support a component for sending a downlink broadcast transmission to at least a first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0139] By including or configuring a communication manager 920 according to examples as described herein, the device 905 may support techniques for broadcast channel link adaptation that provide enhanced system efficiency, reduced overhead, reduced power consumption, or any combination thereof while providing reliable communications and an enhanced user experience.

[0140] In some examples, the communication manager 920 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise cooperating with the transceiver 915, one or more antennas 925, or any combination thereof. Although the communication manager 920 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 920 may be supported or performed by the processor 940, the memory 930, the code 935, or any combination thereof. For example, the code 935 may include instructions executable by the processor 940 to cause the device 905 to perform various aspects of the techniques for link adaptation of broadcast channels as described herein, or the processor 940 and the memory 930 may be otherwise configured to perform or support such operations.

[0141] Fig.10 A block diagram 1000 of a device 1005 supporting techniques for link adaptation of a broadcast channel according to one or more aspects of the present disclosure is shown. The device 1005 may be an example of aspects of a network entity 105 as described herein. The device 1005 may include a receiver 1010, a transmitter 1015, and a communication manager 1020. The device 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0142] Receiver 1010 may provide means for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of device 1005. In some examples, receiver 1010 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, receiver 1010 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof.

[0143] The transmitter 1015 may provide means for outputting (e.g., sending, providing, conveying, transmitting) information generated by other components of the device 1005. For example, the transmitter 1015 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) (such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units)). In some examples, the transmitter 1015 may support outputting information by sending signals via one or more antennas. Additionally or alternatively, the transmitter 1015 may support outputting information by sending signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1015 and the receiver 1010 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0144] The communication manager 1020, the receiver 1010, the transmitter 1015, or various combinations thereof, or various components thereof may be examples of means for performing various aspects of the techniques for link adaptation of broadcast channels as described herein. For example, the communication manager 1020, the receiver 1010, the transmitter 1015, or various combinations thereof, or components thereof may support methods for performing one or more of the functions described herein.

[0145] In some examples, the communication manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a DSP, a CPU, an ASIC, an FPGA or other programmable logic device, a microcontroller, discrete gate or transistor logic components, discrete hardware components, or any combination thereof that is configured as or otherwise supports components for performing the functions described in the present disclosure. In some examples, a processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0146] Additionally or alternatively, in some examples, the communication manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be performed by a general purpose processor (e.g., configured as or otherwise supporting components for performing the functions described in the present disclosure), a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices.

[0147] In some examples, communication manager 1020 may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with receiver 1010, transmitter 1015, or both. For example, communication manager 1020 may receive information from receiver 1010, transmit information to transmitter 1015, or be integrated in conjunction with receiver 1010, transmitter 1015, or both to obtain information, output information, or perform various other operations as described herein.

[0148] According to examples as disclosed herein, the communication manager 1020 may support wireless communications at a network entity. For example, the communication manager 1020 may be configured as or otherwise support components for sending a first downlink transmission to at least a first UE. The communication manager 1020 may be configured as or otherwise support components for receiving a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE. The communication manager 1020 may be configured as or otherwise support components for sending a downlink broadcast transmission to at least a first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0149] By including or configuring a communication manager 1020 according to the examples described herein, the device 1005 (e.g., a processor controlling or otherwise coupled to the receiver 1010, the transmitter 1015, the communication manager 1020, or a combination thereof) may support techniques for broadcast channel link adaptation that provide enhanced system efficiency, reduced overhead, reduced power consumption, or any combination thereof while providing reliable communications.

[0150] Fig.11 A block diagram 1100 of a device 1105 supporting techniques for link adaptation of a broadcast channel according to one or more aspects of the present disclosure is shown. The device 1105 may be an example of aspects of the device 1005 or network entity 105 as described herein. The device 1105 may include a receiver 1110, a transmitter 1115, and a communication manager 1120. The device 1105 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0151] Receiver 1110 may provide means for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of device 1105. In some examples, receiver 1110 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, receiver 1110 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof.

[0152] The transmitter 1115 may provide means for outputting (e.g., sending, providing, conveying, transmitting) information generated by other components of the device 1105. For example, the transmitter 1115 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) (such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units)). In some examples, the transmitter 1115 may support outputting information by sending signals via one or more antennas. Additionally or alternatively, the transmitter 1115 may support outputting information by sending signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1115 and the receiver 1110 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0153] The device 1105 or its various components may be examples of components for performing various aspects of the techniques for link adaptation of broadcast channels as described herein. For example, the communication manager 1120 may include a broadcast communication manager 1125, a measurement indication manager 1130, or any combination thereof. The communication manager 1120 may be an example of various aspects of the communication manager 1020 as described herein. In some examples, the communication manager 1120 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with the receiver 1110, the transmitter 1115, or both. For example, the communication manager 1120 may receive information from the receiver 1110, transmit information to the transmitter 1115, or be integrated with the receiver 1110, the transmitter 1115, or both to obtain information, output information, or perform various other operations as described herein.

[0154] According to examples as disclosed herein, the communication manager 1120 may support wireless communications at a network entity. The broadcast communication manager 1125 may be configured as or otherwise support components for sending a first downlink transmission to at least a first UE. The measurement indication manager 1130 may be configured as or otherwise support components for receiving a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE. The broadcast communication manager 1125 may be configured as or otherwise support components for sending a downlink broadcast transmission to at least a first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0155] Fig.12 A block diagram 1200 of a communication manager 1220 supporting techniques for link adaptation of a broadcast channel according to one or more aspects of the present disclosure is shown. The communication manager 1220 may be an example of aspects of the communication manager 1020, the communication manager 1120, or both as described herein. The communication manager 1220 or its various components may be examples of components for performing various aspects of the techniques for link adaptation of a broadcast channel as described herein. For example, the communication manager 1220 may include a broadcast communication manager 1225, a measurement indication manager 1230, an MCS manager 1235, a transmit power manager 1240, an interference measurement manager 1245, an uplink trigger manager 1250, or any combination thereof. Each of these components may communicate with each other directly or indirectly (e.g., via one or more buses), which communication may include communication within a protocol layer of a protocol stack, communication associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack, within a device, component, or virtualized component associated with the network entity 105, between devices, components, or virtualized components associated with the network entity 105), or any combination thereof.

[0156] According to examples as disclosed herein, the communication manager 1220 may support wireless communications at a network entity. The broadcast communication manager 1225 may be configured as or otherwise support a component for sending a first downlink transmission to at least a first UE. The measurement indication manager 1230 may be configured as or otherwise support a component for receiving a first uplink communication from a first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE. In some examples, the broadcast communication manager 1225 may be configured as or otherwise support a component for sending a downlink broadcast transmission to at least a first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0157] In some examples, to support sending a downlink broadcast transmission, the MCS manager 1235 may be configured to or otherwise support a component for encoding the downlink broadcast transmission based on a modulation and coding scheme, which is selected based on the first channel quality indication. In some examples, the downlink broadcast transmission includes an RMSI shared channel transmission, a paging shared channel transmission, or a RACH response. In some examples, the first uplink communication includes a trigger for an on-demand SSB transmission or an on-demand RMSI transmission, or the first uplink communication includes a PEI response. In some examples, the uplink transmit power for the first uplink communication is based on an open loop power control technique, and the first uplink communication is sent using a transmit timing without an associated timing advance.

[0158] In some examples, the first channel quality indication provides an RSRP associated with the first downlink transmission. In some examples, the measurement indication manager 1230 may be configured to or otherwise support components for configuring a set of available channel quality indications and an associated set of RSRP thresholds mapped to the set of available channel quality indications for the first UE. In some examples, the measurement indication manager 1230 may be configured to or otherwise support components for determining one or more transmission parameters for a downlink broadcast transmission based on one or more of: a sequence included in the first uplink communication, a first uplink transmission resource in an uplink resource used for the first uplink communication, or a received power of the first uplink communication.

[0159] In some examples, the MCS manager 1235 may be configured to or otherwise support a component for determining one or more of a modulation and coding scheme or a downlink transmission power for a downlink broadcast transmission based on a first arrival time of a first uplink communication relative to one or more other arrival times of one or more other uplink communications from one or more other UEs. In some examples, one or more measured channel quality thresholds and an associated mapping to a first channel quality indication are provided to the UE in a pre-specified configuration, system information communication, SSB communication, MIB communication, control channel communication associated with the first downlink transmission, communication from a serving cell to one or more neighboring cells, or any combination thereof. In some examples, the first channel quality indication is provided in a payload of the first uplink communication. In some examples, the payload of the first uplink communication includes one or more bits of a payload field, and different bit values ​​associated with the payload field are mapped to different channel quality thresholds. In some examples, the first channel quality indication also provides an interference indication based on a detected interference level associated with the first downlink transmission.

[0160] Fig.13 A diagram of a system 1300 including a device 1305 supporting techniques for link adaptation for a broadcast channel according to one or more aspects of the present disclosure is shown. The device 1305 may be an example of a device 1005, a device 1105, or a network entity 105 as described herein, or include components of these devices. The device 1305 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, which communication may include communication through one or more wired interfaces, through one or more wireless interfaces, or any combination thereof. The device 1305 may include components that support output and acquisition of communications, such as a communication manager 1320, a transceiver 1310, an antenna 1315, a memory 1325, a code 1330, and a processor 1335. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1340).

[0161] The transceiver 1310 may support bidirectional communication via a wired link, a wireless link, or both as described herein. In some examples, the transceiver 1310 may include a wired transceiver and may communicate bidirectionally with another wired transceiver. Additionally or alternatively, in some examples, the transceiver 1310 may include a wireless transceiver and may communicate bidirectionally with another wireless transceiver. In some examples, the device 1305 may include one or more antennas 1315, which may be capable of (e.g., concurrently) sending or receiving wireless transmissions. The transceiver 1310 may also include a modem for modulating a signal, for providing a modulated signal for transmission (e.g., via one or more antennas 1315, via a wired transmitter), for receiving a modulated signal (e.g., from one or more antennas 1315, from a wired receiver), and for demodulating a signal. Where applicable, transceiver 1310, or transceiver 1310 and one or more antennas 1315, or a wired interface may be an example of transmitter 1015, transmitter 1115, receiver 1010, receiver 1110, or any combination thereof or any component thereof as described herein. In some examples, the transceiver may be operable to support communication via one or more communication links (e.g., communication link 125, backhaul communication link 120, midhaul communication link 162, fronthaul communication link 168).

[0162] Memory 1325 may include RAM and ROM. Memory 1325 may store computer-readable, computer-executable code 1330 including instructions that, when executed by processor 1335, cause device 1305 to perform various functions described herein. Code 1330 may be stored in a non-transitory computer-readable medium, such as system memory or another type of memory. In some cases, code 1330 may not be directly executable by processor 1335, but (e.g., when compiled and executed) may cause a computer to perform the functions described herein. In some cases, memory 1325 may also include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0163] Processor 1335 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA, a microcontroller, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1335 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into processor 1335. Processor 1335 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1325) so that device 1305 performs various functions (e.g., functions or tasks that support techniques for link adaptation of broadcast channels). For example, device 1305 or a component of device 1305 may include processor 1335 and memory 1325 coupled to processor 1335, and processor 1335 and memory 1325 are configured to perform various functions described herein. Processor 1335 can be an example of a cloud computing platform (e.g., one or more physical nodes and supporting software such as an operating system, virtual machine, or container instance) that can host functionality (e.g., by executing code 1330) to perform the functions of device 1305.

[0164] In some examples, bus 1340 may support communications of a protocol layer of a protocol stack (e.g., within the protocol layer). In some examples, bus 1340 may support communications associated with a logical channel of a protocol stack (e.g., between protocol layers of the protocol stack), which may include communications performed within a component of device 1305 or between different components of device 1305 that may be co-located or located in different locations (e.g., where device 1305 may refer to a system where one or more of communication manager 1320, transceiver 1310, memory 1325, code 1330, and processor 1335 may be located in one of the different components or divided between the different components).

[0165] In some examples, communication manager 1320 may manage aspects of communications with core network 130 (e.g., via one or more wired or wireless backhaul links). For example, communication manager 1320 may manage delivery of data communications for client devices, such as one or more UEs 115. In some examples, communication manager 1320 may manage communications with other network entities 105 and may include a controller or scheduler for controlling communications with UE 115 in coordination with other network entities 105. In some examples, communication manager 1320 may support an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between network entities 105.

[0166] According to examples as disclosed herein, the communication manager 1320 may support wireless communications at a network entity. For example, the communication manager 1320 may be configured as or otherwise support components for sending a first downlink transmission to at least a first UE. The communication manager 1320 may be configured as or otherwise support components for receiving a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of the first downlink transmission at the first UE. The communication manager 1320 may be configured as or otherwise support components for sending a downlink broadcast transmission to at least a first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication.

[0167] By including or configuring a communication manager 1320 according to examples as described herein, the device 1305 can support techniques for broadcast channel link adaptation that provide enhanced system efficiency, reduced overhead, reduced power consumption, or any combination thereof while providing reliable communications.

[0168] In some examples, the communication manager 1320 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise cooperating with the transceiver 1310, one or more antennas 1315 (e.g., where applicable), or any combination thereof. Although the communication manager 1320 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 1320 may be supported or performed by the processor 1335, the memory 1325, the code 1330, the transceiver 1310, or any combination thereof. For example, the code 1330 may include instructions executable by the processor 1335 to cause the device 1305 to perform various aspects of the techniques for link adaptation of broadcast channels as described herein, or the processor 1335 and the memory 1325 may be otherwise configured to perform or support such operations.

[0169] Fig.14A flow chart illustrating a method 1400 for supporting link adaptation for a broadcast channel according to one or more aspects of the present disclosure is shown. The operations of the method 1400 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1400 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 9 The UE 115 described herein may be executed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0170] At 1405, the method may include receiving a first downlink transmission from a network entity. The operations of 1405 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1405 may be performed as described in reference to Figure 8 The channel measurement manager 825 is used to perform the above operations.

[0171] At 1410, the method may include sending an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on the measured channel quality of the first downlink transmission. The operations of 1410 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1410 may be performed as described in reference to Figure 8 The described measurements are performed by the manager 830 .

[0172] At 1415, the method may include receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on a channel quality indication. The operations of 1415 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1415 may be performed as described in reference to Figure 8 The described broadcast communication manager 835 is executed.

[0173] Fig.15 A flow chart illustrating a method 1500 for supporting link adaptation for a broadcast channel according to one or more aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1500 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 9 The UE 115 described herein may be executed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0174] At 1505, the method may include receiving a first downlink transmission from a network entity. The operations of 1505 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1505 may be performed as described in reference to Figure 8The channel measurement manager 825 is used to perform the above operations.

[0175] At 1510, the method may include sending an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on the measured channel quality of the first downlink transmission. The operations of 1510 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1510 may be performed as described in reference to Figure 8 The described measurements are performed by the manager 830 .

[0176] At 1515, the method may include receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on a channel quality indication. The operations of 1515 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1515 may be performed as described in reference to Figure 8 The described broadcast communication manager 835 is executed.

[0177] At 1520, the method may include decoding the downlink broadcast transmission based on a modulation and coding scheme, the modulation and coding scheme selected based on the channel quality indication. The operations of 1520 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1520 may be performed as described in reference to Figure 8 The described broadcast communication manager 835 is executed.

[0178] Fig.16 A flow chart illustrating a method 1600 for supporting link adaptation for a broadcast channel according to one or more aspects of the present disclosure is shown. The operations of the method 1600 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1600 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 9 The UE 115 described herein may be executed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0179] At 1605, the method may include receiving a first downlink transmission from a network entity. The operations of 1605 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1605 may be performed as described in reference to Figure 8 The channel measurement manager 825 is used to perform the above operations.

[0180] At 1610, the method may include setting an uplink transmit power for uplink communications based on an open loop power control technique. The operations of 1610 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1610 may be performed as described in reference to Figure 8The described transmit power manager 840 is implemented.

[0181] At 1615, the method may include sending an uplink communication based on receiving the first downlink transmission, the uplink communication providing a channel quality indication based on the measured channel quality of the first downlink transmission. The operations of 1615 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1615 may be performed as described in reference to Figure 8 The described measurement instruction manager 830 may be performed. In some cases, uplink communications may use a transmit timing without an associated timing advance.

[0182] At 1620, the method may include receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on a channel quality indication. The operations of 1620 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1620 may be performed as described in reference to Figure 8 The described broadcast communication manager 835 is executed.

[0183] Fig.17 A flow chart illustrating a method 1700 for supporting link adaptation for a broadcast channel according to one or more aspects of the present disclosure is shown. The operations of the method 1700 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1700 may be implemented by a UE or a component thereof as described in reference to Figures 1 to 9 The UE 115 described herein may be executed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0184] At 1705, the method may include receiving a first downlink transmission from a network entity. The operations of 1705 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1705 may be performed as described in reference to Figure 8 The channel measurement manager 825 is used to perform the above operations.

[0185] At 1710, the method may include measuring the RSRP associated with the first downlink transmission. The operations of 1710 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1710 may be performed as described in reference to Figure 8 The channel measurement manager 825 is used to perform the above operations.

[0186] At 1715, the method may include selecting a channel quality indicator from a set of available channel quality indicators based on RSRP and a set of RSRP thresholds mapped to the set of available channel quality indicators. The operations of 1715 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1715 may be performed as described in reference to Figure 8 The described measurements are performed by the manager 830 .

[0187] At 1720, the method may include selecting one or more of the following based on the channel quality indication: a sequence included in the uplink communication, a first uplink transmission resource in the uplink resources used for transmission of the uplink communication, or a target received power for the uplink communication. The operations of 1720 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1720 may be performed as described in reference to Figure 8 The described measurements are performed by the manager 830 .

[0188] At 1725, the method may include sending an uplink communication. The operations of 1725 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1725 may be performed as described in reference to Figure 8 The described measurements are performed by the manager 830 .

[0189] At 1730, the method may include receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based on a channel quality indication. The operations of 1730 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1730 may be performed as described in reference to Figure 8 The described broadcast communication manager 835 is executed.

[0190] Fig.18 A flow chart illustrating a method 1800 for supporting link adaptation for a broadcast channel according to one or more aspects of the present disclosure is shown. The operations of the method 1800 may be implemented by a UE or a network entity or a component thereof as described herein. For example, the operations of the method 1800 may be implemented by a UE or a network entity or a component thereof as described herein. Figures 1 to 9 UE 115 as described or as referenced Figures 1 to 5 and Figures 10 to 13 In some examples, the UE or network entity may execute an instruction set to control the functional elements of the UE or network entity to perform the described functions. Additionally or alternatively, the UE or network entity may use dedicated hardware to perform various aspects of the described functions.

[0191] At 1805, the method may include sending a first downlink transmission to at least the first UE. The operations of 1805 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1805 may be performed as described in reference to Figure 8 and Fig.12 The described broadcast communication manager 835 or the broadcast communication manager 1225 is executed.

[0192] At 1810, the method may include receiving a first uplink communication from a first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of a first downlink transmission at the first UE. The operations of 1810 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1810 may be performed as described in reference to Figure 8 and Fig.12 The measurement indication manager 830 or the measurement indication manager 1230 described herein may be executed.

[0193] At 1815, the method may include sending a downlink broadcast transmission to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indication. The operations of 1815 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1815 may be performed as described in reference to Figure 8 and Fig.12 The described broadcast communication manager 835 or the broadcast communication manager 1225 is executed.

[0194] Fig.19 A flowchart illustrating a method 1900 for supporting link adaptation for a broadcast channel according to one or more aspects of the present disclosure is shown. The operations of the method 1900 may be implemented by a UE or a network entity or a component thereof as described herein. For example, the operations of the method 1900 may be implemented by a UE or a network entity or a component thereof as described herein. Figures 1 to 9 The UE 115 or as referenced Figures 1 to 5 and Figures 10 to 13 In some examples, the UE or network entity may execute an instruction set to control the functional elements of the UE or network entity to perform the described functions. Additionally or alternatively, the UE or network entity may use dedicated hardware to perform various aspects of the described functions.

[0195] At 1905, the method may include sending a first downlink transmission to at least the first UE. The operations of 1905 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1905 may be performed as described in reference to Figure 8 and Fig.12 The described broadcast communication manager 835 or the broadcast communication manager 1225 is executed.

[0196] At 1910, the method may include receiving a first uplink communication from a first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of a first downlink transmission at the first UE. The operations of 1910 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1910 may be performed as described in reference to Figure 8 and Fig.12 The measurement indication manager 830 or the measurement indication manager 1230 described herein may be executed.

[0197] At 1915, the method may include encoding the downlink broadcast transmission based on a modulation and coding scheme, the modulation and coding scheme selected based on the first channel quality indication. The operations of 1915 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1915 may be performed as described in reference Figure 8 and Fig.12 The MCS manager 855 or the MCS manager 1235 is used for execution.

[0198] At 1920, the method may include sending a downlink broadcast transmission to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indicator. The operations of 1920 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1920 may be performed as described in reference to Figure 8 and Fig.12 The described broadcast communication manager 835 or the broadcast communication manager 1225 is executed.

[0199] Fig. 20 A flow chart illustrating a method 2000 for supporting link adaptation for a broadcast channel according to one or more aspects of the present disclosure is shown. The operations of the method 2000 may be implemented by a UE or a network entity or a component thereof as described herein. For example, the operations of the method 2000 may be implemented by a UE or a network entity or a component thereof as described herein. Figures 1 to 9 The UE 115 or as referenced Figures 1 to 5 and Figures 10 to 13 In some examples, the UE or network entity may execute an instruction set to control the functional elements of the UE or network entity to perform the described functions. Additionally or alternatively, the UE or network entity may use dedicated hardware to perform various aspects of the described functions.

[0200] At 2005, the method may include configuring a set of available channel quality indicators and an associated set of RSRP thresholds mapped to the set of available channel quality indicators for the first UE. The operations of 2005 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2005 may be performed as described in reference to Figure 8 and Fig.12The measurement indication manager 830 or the measurement indication manager 1230 described herein may be executed.

[0201] At 2010, the method may include sending a first downlink transmission to at least the first UE. The operations of 2010 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2010 may be performed as described in reference to Figure 8 and Fig.12 The described broadcast communication manager 835 or the broadcast communication manager 1225 is executed.

[0202] At 2015, the method may include receiving a first uplink communication from a first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of a first downlink transmission at the first UE. The operations of 2015 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2015 may be performed as described in reference to Figure 8 and Fig.12 The described measurement indication manager 830 or the measurement indication manager 1230 may be performed. In some cases, the first channel quality indicator provides an RSRP associated with the first downlink transmission.

[0203] At 2020, the method may include determining one or more transmission parameters for the downlink broadcast transmission based on one or more of: a sequence included in the first uplink communication, a first uplink transmission resource in the uplink resources used for the first uplink communication, or a received power of the first uplink communication. The operations of 2020 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2020 may be performed as described in reference to Figure 8 and Fig.12 The measurement indication manager 830 or the measurement indication manager 1230 described herein may be executed.

[0204] At 2025, the method may include sending a downlink broadcast transmission to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indicator. The operations of 2025 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2025 may be performed as described in reference Figure 8 and Fig.12 The described broadcast communication manager 835 or the broadcast communication manager 1225 is executed.

[0205] Fig.21 A flow chart illustrating a method 2100 for supporting link adaptation for a broadcast channel according to one or more aspects of the present disclosure is shown. The operations of the method 2100 may be implemented by a UE or a network entity or a component thereof as described herein. For example, the operations of the method 2100 may be implemented by a UE or a network entity or a component thereof as described herein. Figures 1 to 9 The UE 115 or as referenced Figures 1 to 5 and Figures 10 to 13 In some examples, the UE or network entity may execute an instruction set to control the functional elements of the UE or network entity to perform the described functions. Additionally or alternatively, the UE or network entity may use dedicated hardware to perform various aspects of the described functions.

[0206] At 2105, the method may include sending a first downlink transmission to at least the first UE. The operations of 2105 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2105 may be performed as described in reference to Figure 8 and Fig.12 The described broadcast communication manager 835 or the broadcast communication manager 1225 is executed.

[0207] At 2110, the method may include receiving a first uplink communication from a first UE, the first uplink communication providing a first channel quality indication of a measured channel quality of a first downlink transmission at the first UE. The operations of 2110 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2110 may be performed as described in reference to Figure 8 and Fig.12 The measurement indication manager 830 or the measurement indication manager 1230 described herein may be executed.

[0208] At 2115, the method may include determining one or more of a modulation and coding scheme or a downlink transmit power for a downlink broadcast transmission based on a first arrival time of the first uplink communication relative to one or more other arrival times of one or more other uplink communications from one or more other UEs. The operations of 2115 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2115 may be performed as described in reference to Figure 8 and Fig.12 The MCS manager 855 or the MCS manager 1235 is used for execution.

[0209] At 2120, the method may include sending a downlink broadcast transmission to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based on the first channel quality indicator. The operations of 2120 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 2120 may be performed as described in reference to Figure 8 and Fig.12 The described broadcast communication manager 835 or the broadcast communication manager 1225 is executed.

[0210] The following provides an overview of various aspects of the disclosure:

[0211] Aspect 1: A method for wireless communication at a UE, the method comprising: receiving a first downlink transmission from a network entity; sending an uplink communication based at least in part on receiving the first downlink transmission, the uplink communication providing a channel quality indication based at least in part on a measured channel quality of the first downlink transmission; and receiving a downlink broadcast transmission, wherein the downlink broadcast transmission has one or more transmission parameters based at least in part on the channel quality indication.

[0212] Aspect 2: A method according to aspect 1, wherein receiving the downlink broadcast transmission includes: decoding the downlink broadcast transmission based at least in part on a modulation and decoding scheme, and the modulation and decoding scheme is selected at least in part based on the channel quality indication.

[0213] Aspect 3: The method according to any one of aspects 1 to 2, wherein the downlink broadcast transmission includes RMSI shared channel transmission, paging shared channel transmission or RACH response.

[0214] Aspect 4: The method according to aspect 3, wherein the uplink communication includes a trigger for on-demand SSB transmission or on-demand RMSI transmission, or the uplink communication includes a PEI response.

[0215] Aspect 5: A method according to any one of Aspects 1 to 4, wherein sending the uplink communication comprises: setting the uplink transmission power for the uplink communication at least in part based on an open-loop power control technique; and sending the uplink communication using a transmission timing without an associated timing advance.

[0216] Aspect 6: The method according to any one of aspects 1 to 5, the method further comprising: measuring a reference signal received power (RSRP) associated with the first downlink transmission, and wherein the channel quality indication is based at least in part on the RSRP.

[0217] Aspect 7: The method according to aspect 6 further comprises: selecting the channel quality indicator from the set of available channel quality indicators based at least in part on the RSRP and a set of RSRP thresholds mapped to the set of available channel quality indicators.

[0218] Aspect 8: According to the method described in Aspect 7, the method also includes: selecting one or more of the following based at least in part on the channel quality indication: a sequence included in the uplink communication, a first uplink transmission resource among the uplink resources used for sending the uplink communication, or a target receiving power for the uplink communication.

[0219] Aspect 9: A method according to any one of Aspects 1 to 8, wherein one or more measured channel quality thresholds and the associated mapping to the channel quality indication are provided to the UE in a pre-specified configuration, SI communication, SSB communication, MIB communication, control channel communication associated with the first downlink transmission, communication from a serving cell to one or more neighboring cells, or any combination thereof.

[0220] Aspect 10: The method according to any one of aspects 1 to 9, wherein the channel quality indication is provided in a payload of the uplink communication.

[0221] Aspect 11: The method according to aspect 10, wherein the payload of the uplink communication includes one or more bits of a payload field, and different bit values ​​associated with the payload field are mapped to different channel quality thresholds.

[0222] Aspect 12: A method according to any one of Aspects 1 to 11, wherein the channel quality indication provides an interference indication, the interference indication is at least partially based on a detected interference level associated with the first downlink transmission, and the uplink communication indicates a transmit beam associated with the UE for the downlink broadcast transmission.

[0223] Aspect 13: According to any one of Aspects 1 to 12, the method further includes: selecting a RACH configuration based at least in part on the channel quality indication, the RACH configuration including one or more of a MSG1 or MSG3 format, a RACH preamble format, a number of repetitions of a RACH message, an MCS of a RACH message, or any combination thereof.

[0224] Aspect 14: A method for wireless communications at a network entity, the method comprising: sending a first downlink transmission to at least a first UE; receiving a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of the measured channel quality of the first downlink transmission at the first UE; and sending a downlink broadcast transmission to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based at least in part on the first channel quality indication.

[0225] Aspect 15: A method according to Aspect 14, wherein sending the downlink broadcast transmission includes: encoding the downlink broadcast transmission based at least in part on a modulation and coding scheme, and the modulation and coding scheme is selected at least in part based on the first channel quality indication.

[0226] Aspect 16: The method according to any one of aspects 14 to 15, wherein the downlink broadcast transmission comprises RMSI shared channel transmission, paging shared channel transmission or RACH response.

[0227] Aspect 17: The method according to aspect 16, wherein the first uplink communication includes a trigger for on-demand SSB transmission or on-demand RMSI transmission, or the first uplink communication includes a PEI response.

[0228] Aspect 18: A method according to any one of aspects 14 to 17, wherein the uplink transmit power used for the first uplink communication is at least partially based on an open loop power control technique, and the first uplink communication is transmitted using a transmit timing without an associated timing advance.

[0229] Aspect 19: The method according to any one of aspects 14 to 18, wherein the first channel quality indication provides an RSRP associated with the first downlink transmission.

[0230] Aspect 20: According to the method of aspect 19, the method further comprises: configuring an available channel quality indicator set and an associated RSRP threshold set mapped to the available channel quality indicator set for the first UE.

[0231] Aspect 21: According to the method described in Aspect 20, the method also includes: determining the one or more transmission parameters used for the downlink broadcast transmission based at least in part on one or more of the following: a sequence included in the first uplink communication, a first uplink transmission resource in the uplink resources used for the first uplink communication, or a receiving power of the first uplink communication.

[0232] Aspect 22: According to the method described in any one of Aspects 14 to 21, the method also includes: determining one or more of the modulation and decoding scheme or the downlink transmission power used for the downlink broadcast transmission based at least in part on the first arrival time of the first uplink communication relative to one or more other arrival times of one or more other uplink communications from one or more other UEs.

[0233] Aspect 23: A method according to any one of Aspects 14 to 22, wherein one or more measured channel quality thresholds and an associated mapping to the first channel quality indication are provided to the UE in a pre-specified configuration, SI communication, SSB communication, MIB communication, control channel communication associated with the first downlink transmission, communication from a serving cell to one or more neighboring cells, or any combination thereof.

[0234] Aspect 24: A method according to any one of aspects 14 to 23, wherein the first channel quality indication is provided in a payload of the first uplink communication.

[0235] Aspect 25: The method according to aspect 24, wherein the payload of the first uplink communication includes one or more bits of a payload field, and different bit values ​​associated with the payload field are mapped to different channel quality thresholds.

[0236] Aspect 26: The method according to any one of aspects 14 to 25, wherein the first channel quality indication further provides an interference indication, the interference indication being based at least in part on a detected interference level associated with the first downlink transmission.

[0237] Aspect 27: An apparatus for performing wireless communications at a UE, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 1 to 13.

[0238] Aspect 28: An apparatus for wireless communication at a UE, the apparatus comprising at least one component for performing a method according to any one of aspects 1 to 13.

[0239] Aspect 29: A non-transitory computer-readable medium storing a code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method according to any one of aspects 1 to 13.

[0240] Aspect 30: An apparatus for wireless communication at a network entity, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 14 to 26.

[0241] Aspect 31: An apparatus for wireless communication at a network entity, the apparatus comprising at least one component for performing a method according to any one of aspects 14 to 26.

[0242] Aspect 32: A non-transitory computer-readable medium storing code for wireless communication at a network entity, the code comprising instructions executable by a processor to perform the method according to any one of aspects 14 to 26.

[0243] It should be noted that the methods described herein describe possible implementations, and that the various operations and steps may be rearranged or otherwise modified and that other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0244] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described may be applicable to various other wireless communication 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, and other systems and radio technologies not explicitly mentioned herein.

[0245] The information and signals described herein may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the specification may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0246] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed using a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any processor, controller, microcontroller, or state machine. The 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).

[0247] 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 one or more instructions or codes of a computer-readable medium, or sent using one or more instructions or codes of a computer-readable medium. Other examples and specific implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these items. Features that implement the functions may also be physically located at different locations, including being distributed so that the various parts of the functions are implemented at different physical locations.

[0248] Computer-readable medium includes both non-transient computer storage medium and communication medium, and it includes any medium that facilitates computer program to be transmitted from one position to another position.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.By way of example and not limitation, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage device, disk storage device or other magnetic storage device, or can be used for carrying or storing desired program code parts and any other non-transient medium that can be accessed by general or special-purpose computer or general or special-purpose processor in the form of instruction or data structure.In addition, any connection is appropriately referred to as computer-readable medium.For example, if software is sent from website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer-readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc. Disks can reproduce data magnetically, while discs can reproduce data optically using lasers. Combinations of the above are also included within the scope of computer readable media.

[0249] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items followed by a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so 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). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0250] The term "determining" encompasses a variety of actions, and thus, "determining" may include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, database or other data structure), ascertaining, and the like. Furthermore, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data stored in a memory), etc. Additionally, "determining" may include parsing, obtaining, selecting, choosing, establishing, and other such similar actions.

[0251] In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by following the reference label with a dash and a second label to distinguish between the similar components. If only the first reference label is used in the specification, the description may apply to any of the similar components having the same first reference label, regardless of the second or other subsequent reference labels.

[0252] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "having advantages over other examples." The specific embodiments include specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some cases, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0253] The description herein is provided to enable one of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), the method comprising: receiving a first downlink transmission from a network entity; transmitting, based at least in part on receiving the first downlink transmission, an uplink communication providing a channel quality indication based at least in part on the measured channel quality of the first downlink transmission; as well as A downlink broadcast transmission is received, wherein the downlink broadcast transmission has one or more transmission parameters based at least in part on the channel quality indication.

2. The method of claim 1 , wherein receiving the downlink broadcast transmission comprises: The downlink broadcast transmission is decoded based at least in part on a modulation and coding scheme selected based at least in part on the channel quality indication.

3. The method of claim 1, wherein the downlink broadcast transmission comprises a remaining minimum system information (RMSI) shared channel transmission, a paging shared channel transmission, or a random access channel (RACH) response.

4. The method of claim 3, wherein the uplink communication comprises a trigger for an on-demand synchronization signal block (SSB) transmission or an on-demand RMSI transmission, or the uplink communication comprises a paging early indication (PEI) response.

5. The method of claim 1 , wherein sending the uplink communication comprises: setting an uplink transmit power for said uplink communication based at least in part on an open loop power control technique; as well as The uplink communication is transmitted using a transmit timing without an associated timing advance.

6. The method according to claim 1, further comprising: A reference signal received power (RSRP) associated with the first downlink transmission is measured, and wherein the channel quality indication is based at least in part on the RSRP.

7. The method according to claim 6, further comprising: The channel quality indicator is selected from the set of available channel quality indicators based at least in part on the RSRP and a set of RSRP thresholds mapped to the set of available channel quality indicators.

8. The method according to claim 7, further comprising: One or more of: a sequence included in the uplink communication, a first uplink transmission resource in a set of uplink resources used for transmission of the uplink communication, or a target received power for the uplink communication is selected based at least in part on the channel quality indication.

9. The method of claim 1 , wherein one or more measured channel quality thresholds and an associated mapping to the channel quality indication are provided to the UE in a pre-specified configuration, a system information (SI) communication, a synchronization signal block (SSB) communication, a master information block (MIB) communication, a control channel communication associated with the first downlink transmission, a communication from a serving cell to one or more neighboring cells, or any combination thereof.

10. The method of claim 1, wherein the channel quality indication is provided in a payload of the uplink communication.

11. The method of claim 10, wherein the payload of the uplink communication comprises one or more bits of a payload field, and different bit values ​​associated with the payload field are mapped to different channel quality thresholds.

12. The method of claim 1, wherein: The channel quality indication provides an interference indication based at least in part on a detected interference level associated with the first downlink transmission, and The uplink communication indicates a transmit beam associated with the UE for the downlink broadcast transmission.

13. The method according to claim 1, further comprising: A random access channel (RACH) configuration is selected based at least in part on the channel quality indication, the RACH configuration comprising one or more of a message-1 (MSG1) or message-3 (MSG3) format, a RACH preamble format, a number of repetitions of a RACH message, a modulation and coding scheme (MCS) of the RACH message, or any combination thereof.

14. A method for wireless communication at a network entity, the method comprising: sending a first downlink transmission to at least a first user equipment (UE); receiving a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of the measured channel quality of the first downlink transmission at the first UE; as well as A downlink broadcast transmission is transmitted to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based at least in part on the first channel quality indication.

15. The method of claim 14, wherein sending the downlink broadcast transmission comprises: The downlink broadcast transmission is encoded based at least in part on a modulation and coding scheme selected based at least in part on the first channel quality indication.

16. The method of claim 14, wherein the downlink broadcast transmission comprises a remaining minimum system information (RMSI) shared channel transmission, a paging shared channel transmission, or a random access channel (RACH) response.

17. The method of claim 16, wherein the first uplink communication comprises a trigger for an on-demand synchronization signal block (SSB) transmission or an on-demand RMSI transmission, or the first uplink communication comprises a paging early indication (PEI) response.

18. The method of claim 14, wherein uplink transmit power for the first uplink communication is based at least in part on an open loop power control technique, and the first uplink communication is transmitted using a transmit timing without an associated timing advance.

19. The method of claim 14, wherein the first channel quality indicator provides a reference signal received power (RSRP) associated with the first downlink transmission.

20. The method according to claim 19, further comprising: An available channel quality indicator set and an associated RSRP threshold set mapped to the available channel quality indicator set are configured for the first UE.

21. The method according to claim 20, further comprising: The one or more transmission parameters used for the downlink broadcast transmission are determined at least in part based on one or more of: a sequence included in the first uplink communication, a first uplink transmission resource in an uplink resource set used for the first uplink communication, or a received power of the first uplink communication.

22. The method according to claim 14, further comprising: One or more of a modulation and coding scheme or a downlink transmit power for the downlink broadcast transmission is determined based at least in part on a first arrival time of the first uplink communication relative to one or more other arrival times of one or more other uplink communications from one or more other UEs.

23. The method of claim 14, wherein one or more measured channel quality thresholds and an associated mapping to the first channel quality indication are provided to the UE in a pre-specified configuration, a system information (SI) communication, a synchronization signal block (SSB) communication, a master information block (MIB) communication, a control channel communication associated with the first downlink transmission, a communication from a serving cell to one or more neighboring cells, or any combination thereof.

24. The method of claim 14, wherein the first channel quality indication is provided in a payload of the first uplink communication.

25. The method of claim 24, wherein the payload of the first uplink communication comprises one or more bits of a payload field, and different bit values ​​associated with the payload field are mapped to different channel quality thresholds.

26. The method of claim 14, wherein the first channel quality indicator further provides an interference indication based at least in part on a detected interference level associated with the first downlink transmission.

27. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receiving a first downlink transmission from a network entity; transmitting, based at least in part on receiving the first downlink transmission, an uplink communication providing a channel quality indication based at least in part on the measured channel quality of the first downlink transmission; as well as A downlink broadcast transmission is received, wherein the downlink broadcast transmission has one or more transmission parameters based at least in part on the channel quality indication.

28. The apparatus of claim 27, wherein the instructions to receive the downlink broadcast transmission are executable by the processor to cause the apparatus to: The downlink broadcast transmission is decoded based at least in part on a modulation and coding scheme selected based at least in part on the channel quality indication.

29. An apparatus for wireless communication at a network entity, the apparatus comprising: processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: sending a first downlink transmission to at least a first user equipment (UE); receiving a first uplink communication from the first UE, the first uplink communication providing a first channel quality indication of the measured channel quality of the first downlink transmission at the first UE; as well as A downlink broadcast transmission is transmitted to at least the first user equipment, wherein the downlink broadcast transmission has one or more transmission parameters based at least in part on the first channel quality indication.

30. The apparatus of claim 29, wherein the instructions to send the downlink broadcast transmission are executable by the processor to cause the apparatus to: The downlink broadcast transmission is encoded based at least in part on a modulation and coding scheme selected based at least in part on the first channel quality indication.

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