Uplink control channel resource selection for scheduling request transmission

Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support techniques for a user equipment (UE) to select a scheduling request resource from multiple scheduling request resources allocated across different cells based on one or more conditions. The UE may receive control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell. The UE may generate a scheduling request applicable to the first and second scheduling request resources. The UE may select the first scheduling request resource for transmission of the scheduling request on the first cell based on one or more of a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell. The UE may transmit the scheduling request via the first resource on the first cell based on the selecting.

FIELD OF TECHNOLOGY

The following relates to wireless communication, including uplink control channel resource selection for scheduling request transmission.

BACKGROUND

In some systems, a UE may transmit a scheduling request to request resources for an uplink transmission by the UE. The UE may transmit the scheduling request via one or more physical uplink control channel (PUCCH) resources indicated via a scheduling request configuration.

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support uplink control channel resource selection for scheduling request transmission. In some wireless communications systems, a user equipment (UE) may be configured to communicate with a network over multiple cells (e.g., a primary cell (PCell), a secondary cell (SCell), a secondary cell of a master or secondary cell group (SpCell), another type of cell, or any combination thereof). A network entity may transmit control signaling to the UE to allocate scheduling request resources (e.g., physical uplink control channel (PUCCH) resources) for the UE across the cells. In some aspects, the UE may generate a scheduling request at a first time, and there may be available scheduling request resources allocated on multiple cells at the same time, or within a time period of the first time. Generally, the described techniques may provide a mechanism for the UE to select between the multiple available scheduling request resources on different cells for transmission of the scheduling request.

The UE may select a scheduling request resource from the multiple scheduling request resources indicated via the control signaling for transmission of the scheduling request based on one or more parameters or conditions associated with the UE, associated with the cells corresponding to the one or more scheduling request resources, or both. For example, the scheduling request resource selection may be based on a power mode of the UE (e.g., a low power mode), a relative signal metric (e.g., reference signal received power (RSRP)) associated with the cells, a relative numerology of the cells, or a combination thereof. The UE may transmit the scheduling request via the selected scheduling request resource on the corresponding cell. The selection of the scheduling request resource based on the one or more conditions or parameters may provide for reduced ambiguity, which may reduce latency and improve reliability and throughput of the scheduling request transmission.

A method for wireless communication at a UE is described. The method may include receiving control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell, generating a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request, selecting the first scheduling request resource for transmission of the scheduling request on the first cell based on one or more of: a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell, and transmitting the scheduling request via the first scheduling request resource on the first cell based on the selecting.

An apparatus for wireless communication at a UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell, generate a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request, select the first scheduling request resource for transmission of the scheduling request on the first cell based on one or more of: a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell, and transmit the scheduling request via the first scheduling request resource on the first cell based on the selecting.

Another apparatus for wireless communication at a UE is described. The apparatus may include means for receiving control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell, means for generating a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request, means for selecting the first scheduling request resource for transmission of the scheduling request on the first cell based on one or more of: a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell, and means for transmitting the scheduling request via the first scheduling request resource on the first cell based on the selecting.

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 control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell, generate a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request, select the first scheduling request resource for transmission of the scheduling request on the first cell based on one or more of: a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell, and transmit the scheduling request via the first scheduling request resource on the first cell based on the selecting.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for operating in a reduced power mode, where selecting the first scheduling request resource may be based on operating in the reduced power mode.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, selecting the first scheduling request resource may include operations, features, means, or instructions for selecting the first scheduling request resource based on a type of the first cell associated with the first scheduling request resource.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the type of the first cell may be an SpCell and selecting the first scheduling request resource may be based on the type of the first cell being the SpCell.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, selecting the first scheduling request resource may include operations, features, means, or instructions for selecting the first scheduling request resource based on the signal metric associated with the first cell being greater than a second signal metric associated with the second cell.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving one or more reference signals via the first cell and the second cell and measuring the signal metric associated with the first cell and the second signal metric associated with the second cell based on the one or more reference signals, where selecting the first scheduling request resource may be based on the measuring.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the scheduling request may include operations, features, means, or instructions for transmitting the scheduling request according to a first transmission power, the first transmission power based on a value of the signal metric.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the signal metric and the second signal metric include RSRP metrics.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, selecting the first scheduling request resource may include operations, features, means, or instructions for selecting the first scheduling request resource based on the numerology of the first cell being greater than or equal to a numerology of the second cell.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, selecting the first scheduling request resource may include operations, features, means, or instructions for selecting the first scheduling request resource based on a type of the first cell.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first scheduling request resource and the second scheduling request resource may be at least partially overlapping in time. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first scheduling request resource and the second scheduling request resource may be non-overlapping in time.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the control signaling may indicate a same scheduling request identifier (ID) for the first scheduling request resource and the second scheduling request resource, generating the scheduling request may be based on the same scheduling request ID, and the selecting may be based on both the first scheduling request resource and the second scheduling request resource being associated with the same scheduling request ID as the scheduling request.

DETAILED DESCRIPTION

In some wireless communications systems, a user equipment (UE) may transmit a scheduling request to request uplink resources for a subsequent transmission by the UE. The scheduling request may be transmitted via a physical uplink control channel (PUCCH) according to a scheduling request configuration. For example, a network entity may transmit control signaling (e.g., a radio resource control (RRC) configuration), which may be referred to as a scheduling request configuration, that may allocate one or more PUCCH resources for transmission of the scheduling request. In some aspects, the PUCCH resources may be referred to as scheduling request resources. The scheduling request configuration and each of the scheduling request resources indicated by the scheduling request configuration may be associated with or identified by a same scheduling request identifier (ID). The scheduling request resources indicated by the scheduling request configuration may be allocated across one or more cells, such as a secondary cell (SCell), a primary cell (PCell), a primary cell of a master or secondary cell group (SpCell), or any combination thereof.

If a UE is configured with scheduling request resources on different cells that correspond to a same scheduling request ID, selection of which scheduling request resource to use to signal a scheduling request may be up to UE implementation. In some cases, for example, the UE may select a scheduling request resource on the SCell, and the UE may refrain from transmitting scheduling request on the SpCell for a duration, which may reduce reliability and increase power consumption. Additionally, or alternatively, the scheduling request resource selection may be random or otherwise ambiguous.

As described herein, a UE that is configured with scheduling request resources on two or more different cells may select a scheduling request resource for transmission of a scheduling request based on one or more conditions or parameters to reduce ambiguity. The techniques for scheduling request resource selection described herein may provide for improved communication reliability and throughput, as well as reduced latency and reduced power consumption by the UE. For example, the UE may select a scheduling request resource based on a power mode of the UE, a signal metric level (e.g., a reference signal received power (RSRP) level, or some other signal metric) of a corresponding cell, a numerology of the corresponding cell (e.g., a slot length in the time domain, a symbol length in the time domain, or a subcarrier spacing (SCS) value), or any combination thereof. The UE may select the scheduling request resource from two or more scheduling request resources that are configured for scheduling request transmission on different cells and are associated with a same scheduling request ID. The two or more scheduling request resources may be overlapping or non-overlapping in time. The UE may transmit the scheduling request to a network entity via the selected scheduling request resource. In response to the scheduling request, the network entity may grant or schedule uplink shared channel resources for the UE to use for the transmission.

In some aspects, the UE may operate in a reduced power mode. The UE may be configured to select a scheduling request resource based on a type of cell when operating in the reduced power mode. If the UE operates in the reduced power mode, the UE may select a scheduling request resource on an SpCell, for example, to improve reliability of transmissions during the reduced power mode. In some other aspects, the UE may measure a signal metric (e.g., RSRP) associated with each cell. The UE may select a scheduling request resource on the cell that is associated with a greatest measured signal metric to improve reliability and reduce power consumption. In some other aspects, the UE may select a scheduling request resource on the cell that is associated with a greatest numerology (e.g., a shortest slot length, a shortest symbol length, or greatest SCS). The UE may transmit the scheduling request via the selected scheduling request resource on the cell associated with the greatest numerology faster than if the UE transmits the scheduling request on the other cells associated with lower numerologies. The UE may thus select a scheduling request resource from a set of configured scheduling request resources associated with a same scheduling request ID based on one or more rules or parameters configured to improve reliability and throughput of the scheduling request transmission while reducing latency and power consumption by the UE.

Aspects of the disclosure are initially described in the context of wireless communications systems. Additional aspects are described in the with reference to communication timelines and process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to uplink control channel resource selection for scheduling request transmission.

For instance, an access network (AN) or RAN may include communications between access nodes (e.g., an IAB donor), IAB nodes104, and one or more UEs115. The IAB donor may facilitate connection between the core network130and the AN (e.g., via a wired or wireless connection to the core network130). That is, an IAB donor may refer to a RAN node with a wired or wireless connection to core network130. The IAB donor may include a CU160and at least one DU165(e.g., and RU170), in which case the CU160may communicate with the core network130over an interface (e.g., a backhaul link). IAB donor and IAB nodes104may communicate over an F1 interface according to a protocol that defines signaling messages (e.g., an F1 AP protocol). Additionally, or alternatively, the CU160may communicate with the core network over an interface, which may be an example of a portion of backhaul link, and may communicate with other CUs160(e.g., a CU160associated with an alternative IAB donor) over an Xn-C interface, which may be an example of a portion of a backhaul link.

The UEs115and the network entities105may wirelessly communicate with one another via one or more communication links125(e.g., an access link) over one or more carriers. The term “carrier” may refer to a set of RF spectrum resources having a defined physical layer structure for supporting the communication links125. For example, a carrier used for a communication link125may include a portion of a RF spectrum band (e.g., a bandwidth part (BWP)) that is operated 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 that coordinates operation for the carrier, user data, or other signaling. The wireless communications system100may support communication with a UE115using carrier aggregation or multi-carrier operation. A UE115may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.

Communication between a network entity105and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity105. For example, the terms “transmitting,” “receiving,” or “communicating,” when referring to a network entity105, may refer to any portion of a network entity105(e.g., a base station140, a CU160, a DU165, a RU170) of a RAN communicating with another device (e.g., directly or via one or more other network entities105).

In some examples of the wireless communications system100, a UE115may receive control signaling that may indicate or configure one or more scheduling request resources. The scheduling request resources may be allocated across a first cell, a second cell, one or more other cells, or any combination thereof (e.g., a PCell, an SCell, an SpCell, or some other cell). The UE115may generate a scheduling request based on the control signaling to request resources for a subsequent uplink transmission by the UE115. The generated scheduling request may be applicable to each of the scheduling request resources indicated by the control signaling. For example, the control signaling may correspond to a scheduling request resource configuration that may be associated with a single scheduling request ID, such that each of the indicated scheduling request resources may be associated with the same scheduling request ID as the generated scheduling request.

The UE115may select a scheduling request resource (e.g., a PUCCH resource) for transmission of the scheduling request on one of the cells based on one or more parameters or conditions associated with the UE115, the cells, or both. For example, the scheduling request resource selection may be based on a power mode of the UE115(e.g., a low power mode), a relative signal metric (e.g., RSRP) associated with the cells, a relative numerology of the cells, or a combination thereof. The UE115may transmit the scheduling request via the selected scheduling request resource on the corresponding cell. The selection of the scheduling request resource based on the one or more conditions or parameters may provide for reduced ambiguity, which may reduce latency of communications and improve reliability and throughput of the scheduling request transmission.

FIG.2illustrates an example of a wireless communications system200that supports uplink control channel resource selection for scheduling request transmission in accordance with one or more aspects of the present disclosure. The wireless communications system200may implement or be implemented by aspects of the wireless communications system100as described with reference toFIG.1. For example, the wireless communications system200may include a network entity105-aand UE115-awhich may represent examples of a network entity105and a UE115as described with reference toFIG.1. The network entity105-amay communicate with the UE115-awithin a geographic coverage area110-aand via one or more cells210(e.g., cells210-aand210-b). In some aspects, the network entity105-amay transmit downlink data or control information to the UE115-avia a downlink communication link205, which may be included in or separate from one or more of the cells210.

The UE115-aand the network entity105-amay exchange signaling on one or both of the cell210-aand the cell210-b. The cell210-aand the cell210-bmay be examples of different serving cells or different component carriers supported for communication between the UE115-aand the network entity105-a. A cell210may refer to a logical communication entity used for communication with the network entity105-a(e.g., over a carrier). Each cell210may be associated with a respective cell ID for distinguishing from other neighbor cells. The cell210-aand the cell210-bmay be associated with the same network entity105-aor with different network entities105. For example, the network entity105-amay provide communication coverage via the cell210-a, the cell210-b, one or more other cells210, or any combination thereof. In some aspects, a different component of the network entity105-a(e.g., a different RU, CU, radio head, or transmission/reception point (TRP)) may be associated with each cell210. In some other aspects, the210-aand the cell210-bmay be associated with different network entities105(not illustrated inFIG.2).

The cell210-aand the cell210-bmay be co-located (e.g., may be located at a same physical location) or may be distributed (e.g., may be located at different physical locations). For example, as illustrated inFIG.2, the cell210-aand the cell210-bmay be associated with the same coverage area110-a. In some other aspects, the cell210-amay be associated with the coverage area110-aand the UE115-amay communicate via a second cell210that may be associated with a different coverage area110or portion of a coverage area110that is at least partially overlapping with the coverage area110-a. Each of the cells210-aand210-bmay be an example of or may otherwise function as a PCell, an SCell, a P(S)Cell (e.g., one or both of a PCell and a PSCell), an SpCell, or some other type of cell. The SpCell may correspond to a primary cell of a cell group, such as a master cell group or a secondary cell group. In some aspects, the SpCell may be associated with higher reliability than a secondary cell in the cell group.

After establishing a connection with the UE115-avia one or more cells210, the network entity105-amay transmit control signaling215to the UE115-a. The control signaling215may represent an example of an RRC configuration, a medium access control-control element (MAC-CE), downlink control information (DCI), or some other control signaling215. The control signaling215may be transmitted via the downlink communication link205, which may be associated with the cell210-a, the cell210-b, another cell210, or any combination thereof. The control signaling215may include a scheduling request configuration (e.g., an information element (IE) in the control signaling215) that may allocate PUCCH resources via which the UE115-amay transmit a scheduling request230. The PUCCH resources allocated for the scheduling request230may be referred to as scheduling request resources220herein.

The scheduling request configuration may additionally or alternatively configure one or more parameters for the cell210-aand/or the cell210-b, may indicate one or more timers for scheduling request transmission (e.g., prohibit timers), or both. The scheduling request configuration and each of the scheduling request resources220indicated by the scheduling request configuration may be associated with a same scheduling request ID.

The UE115-amay select a scheduling request resource220from the set of scheduling request resources220allocated by the scheduling request configuration to use for transmitting a scheduling request230. The UE115-amay select a scheduling request resource220when the UE115-ais triggered to generate an uplink transmission (e.g., the UE115-ahas data to transmit). The scheduling request230transmitted by the UE115-avia the selected scheduling request resource220may request uplink resources (e.g., physical uplink shared channel (PUSCH) resources) for the subsequent uplink transmission by the UE115-a. The network entity105-amay receive the scheduling request230and select resources to allocate to the UE115-a. The network entity105-amay transmit second control signaling215to the UE115a to indicate the allocated PUSCH resources.

The scheduling request230generated by the UE115-amay be associated with a same scheduling request ID as the scheduling request ID of the scheduling request configuration. That is, the UE115-amay select a scheduling request resource220from a set of scheduling request resources220having a same scheduling request ID as the generated scheduling request230. In some cases, however, the scheduling request configuration may allocate scheduling request resources220having a same scheduling request ID on multiple cells210. In the example ofFIG.2, the scheduling request configuration may allocate scheduling request resources220on both of the cells210-aand210-b. In such cases, techniques for selecting which scheduling request resource220and which corresponding cell210to use for the scheduling request transmission via may be ambiguous.

In some cases, for example, the UE115-amay select a scheduling request resource220randomly, or the UE115-amay select a scheduling request resource220that occurs earlier in time, which may result in the UE115-arepeatedly transmitting on one of the cells210. For example, the scheduling request resources220may be allocated earlier in time on the cell210-b(e.g., an SCell) than on the cell210-a(e.g., a SpCell), such that the UE115-amay select the scheduling request resources220on the cell210-bfor each scheduling request230, which may be associated with lower reliability, lower throughput, and increased latency as compared to alternating which cells210are used for transmission or transmitting on the cell210-a.

To reduce ambiguity and improve communication reliability, the UE115-aas described herein may select a scheduling request resource220based on various conditions or parameters, such as a power mode of the UE115-a, a signal metric associated with the cells210, a numerology of the cells210, or any combination thereof. The UE115-amay subsequently transmit the generated scheduling request230via the selected scheduling request resource220on the corresponding cell210. The conditions and parameters for scheduling request resource selection described herein may provide rules for selecting a scheduling request resource220on a cell210that may provide for improved throughput and reliability for a given wireless communication, as well as reduced latency for uplink transmissions.

In some aspects, the UE115-amay operate in a reduced power mode. The UE115-amay be configured to select a scheduling request resource220based on a type of cell when operating in this reduced power mode. For example, if the scheduling request configuration allocates scheduling request resource(s)220on both the cell210-aand the cell210-band the UE115-aoperates in the reduced power mode, the UE115-amay select the scheduling request resource220allocated on the cell210-abased on the type of the cell and a rule pertaining to cell selection for scheduling request transmission during a reduced power mode. The rule for which type of cell210to select when operating in the reduced power mode may be configured (e.g., pre-defined in a standard or configured during manufacture of the UE115-a) or indicated to the UE115-avia control signaling215(e.g., an RRC configuration, DCI, or a MAC-CE).

The rule may, in some aspects, instruct the UE115-ato select a cell210that is associated with scheduled transmissions having higher transmission power than other cells210to improve throughput and reliability of transmissions while the UE115-aoperates in the reduced power mode. For example, if the cell210-ais an SpCell and the cell210-bis an SCell and the UE115-aoperates in the reduced power mode, the UE115-amay select a scheduling request resource220on the SpCell based on the rule and the SpCell transmissions being scheduled with higher power than the SCell (e.g., PUCCH SCell) transmissions. Additionally, or alternatively, the rule may indicate a certain type of cell210for the reduced power mode.

In some other aspects, the UE115-amay measure a signal metric associated with each cell210, and the UE115-amay select a scheduling request resource220based on the measured signal metrics. For example, the UE115-amay select a scheduling request resource220on a cell210that is associated with a greatest measured signal metric to improve reliability and reduce power consumption. The signal metric may be a reference signal received power (RSRP), a signal-to-noise ratio (SNR), a signal-to-interference-plus-noise ratio (SINR), or some other signal metric. The UE115-amay receive one or more reference signals225via each cell210and measure the signal metric associated with each of the cells210-aand210-bbased on the reference signals225. In some aspects, the UE115-amay measure a greater RSRP of the reference signals225received via the cell210-bthan the measured RSRP of the reference signals225received via the cell210-a, and the UE115-amay select a scheduling request resource220on the cell210-bfor a scheduling request230accordingly.

The signal metric levels may remain the same for each cell210over time or may change dynamically. In some aspects, the UE115-amay subsequently measure a greater RSRP level of the cell210-athan the cell210-b, and the UE115-amay select a scheduling request resource220on the cell210-aaccordingly for a subsequent scheduling request230. By selecting the scheduling request resource220on whichever cell210has a greatest signal metric, the UE115-amay increase a reliability of the transmission of the scheduling request230and may reduce power consumption by the UE115-a. For example, the UE115-amay transmit the scheduling request230according to a transmission power that is based on a value of the signal metric. If the cell210-ahas a lower signal metric measurement than the cell210-b, the UE115-amay transmit the scheduling request230according to a lower transmission power on the cell210-athan the cell210-b, which may reduce power consumption and complexity.

In some other aspects, the UE115-amay select a scheduling request resource220based on a numerology (e.g., a symbol length, a slot length, or an SCS) of each cell210. For example, the UE115-amay select a scheduling request resource220on a cell210that is associated with a greater numerology than the numerologies of the other cells210on which the scheduling request resources220are allocated. In the example ofFIG.2, if scheduling request resources220associated with a same scheduling request ID are allocated on the cell210-aand the cell210-b, and the cell210-ahas a greater numerology than the cell210-b, the UE115-amay select the scheduling request resource220on the cell210-afor transmission of the scheduling request230. The cells210may be any type of cells210described herein or any additional types of cells210. In some aspects, transmissions via a cell210having a greater numerology may be associated with reduced latency (e.g., faster) as compared with transmissions on other cells210. As such, selecting the scheduling request resources220based on a numerology of a cell210as described herein may reduce latency.

If a numerology of one cell210is the same as the numerology of another cell210, the UE115-amay be configured to select the scheduling request resource220based on a type of the cells210(e.g., based on a rule pertaining to cell selection for scheduling request). For example, the rule may indicate that the UE115-ais to select a scheduling request resource220on an SpCell, or some other type of cell210. In some aspects, a certain type of cell210, such as the SpCell, may be utilized as a default when a numerology of two or more cells210is unavailable, inconclusive, or if they numerologies are equal. Transmission on the default cell210may, in some aspects, be associated with higher power than other cells210, such that transmissions on the default cell210may have improved reliability and throughput.

The UE115-amay thus select a scheduling request resource220from a set of multiple scheduling request resources220associated with a same scheduling request ID and allocated across multiple cells210based on one or more conditions, parameters, and rules as described herein. The described scheduling request resource selection techniques may reduce ambiguity, and improve performance of the scheduling request transmission by the UE115-a. For example, the described techniques may provide for the UE115-ato select a scheduling request resource220that is associated with improved reliability, improved throughput, reduced power consumption, or reduced latency as compared with other selection techniques. The described conditions, parameters, and rules may be applied by the UE115-awhen the set of allocated scheduling request resources220are at least partially overlapping in time, or are non-overlapping in time, as described in further detail elsewhere herein, including with reference toFIGS.3and4.

FIG.3illustrates an example of a communication timeline300that supports uplink control channel resource selection for scheduling request transmission in accordance with one or more aspects of the present disclosure. In some examples, the communication timeline300may implement aspects of wireless communications systems100and200as described with reference toFIGS.1and2. For example, the communication timeline300illustrates scheduling request resources320(e.g., PUCCH resources) that are allocated on an SpCell305and an SCell310, which may represent examples of corresponding elements described with reference toFIG.2. In this example, the scheduling request resources320on the SpCell305may not overlap in time with the scheduling request resources320on the SCell310.

The scheduling request resources320may be allocated by a network entity105for a UE115, which may represent examples of corresponding devices as described with reference toFIGS.1and2. For example, the network entity105may transmit control signaling including a scheduling request configuration that allocates the scheduling request resources320on the SpCell305and the SCell310to the UE115, as described with reference toFIG.2. The scheduling request configuration may indicate a scheduling request ID315(e.g., SR id_0, or some other ID) associated with each of the scheduling request resources320that are allocated by the configuration. The scheduling request resources320may include time and frequency resources allocated within a bandwidth of each cell.

The UE115, the network entity105, or both may, in some aspects, be configured with various timers for scheduling request communications. One example of such a timer may include a scheduling request timer325(e.g., a scheduling request prohibit timer) that may be configured when latency tolerant data is available for transmission by the UE115. The scheduling request timer325may be configured for a logical channel, various layers of a network, for one or more cells, or any combination thereof. The scheduling request timer325may assist with prioritization of high priority traffic. For example, the network entity105may refrain from scheduling uplink resources, and the UE115may refrain from transmitting a scheduling request before the scheduling request timer325expires to provide for transmission of high priority traffic (e.g., time sensitive information).

In the example ofFIG.3, if the UE115selects scheduling request resource320randomly or based on an earliest available resource, the UE115may select the scheduling request resource320on the SCell310. The UE115may transmit a scheduling request via the scheduling request resource320on the SCell310, which may initiate the scheduling request timer325. The UE115may not transmit a scheduling request before expiration of the scheduling request timer325. As such, the UE115may not transmit a scheduling request via the scheduling request resource320on the SpCell305. In some aspects, the scheduling request resources320may be configured periodically, such that a similar allocation of resources may be present on the SpCell305and the SCell310over one or more time periods (e.g., every 100 ms, or some other time period). In such cases, the UE115may continue to transmit the scheduling request via the SCell310, and the UE115may refrain from transmitting via the SpCell305, which may reduce reliability and throughput of the communications.

To reduce ambiguity and improve communication reliability, the UE115may select a scheduling request resource320from the set of scheduling request resources320that are associated with the same scheduling request ID315based on one or more conditions, rules, and parameters. In the example ofFIG.3, the scheduling request configuration may allocate scheduling request resource320on the SpCell305and the SCell310, and the scheduling request resource320on the SCell310may occur first in time. However, the UE115may select either one of the scheduling request resources320based on the rules and parameters described herein.

For example, if the UE115operates in a reduced power mode, the UE115may select a scheduling request resource320based on a type of cell on which the scheduling request resource320is allocated. In some aspects, the UE115may receive signaling or a configuration that indicates the type of cell (e.g., a rule pertaining to cell selection for scheduling request transmission). In the example ofFIG.3, if the type of the cell indicated by the rule pertaining to cell selection for scheduling request is an SpCell305, the UE115may select the scheduling request resource320on the SpCell inFIG.3. The UE115may transmit a scheduling request via the scheduling request resource320on the SpCell305, and the UE115may refrain from transmitting via the scheduling request resource320on the SCell310(e.g., the UE115may skip this resource). In such cases, the scheduling request timer325may be initiated by the transmission of the scheduling request via the scheduling request resource320on the SpCell305.

In some other aspects, the UE115may measure a signal metric (e.g., RSRP, SNR, SINR, or some other signal metric) based on one or more reference signals received via each of the SpCell305and the SCell310. The UE115may select the scheduling request resource320on whichever cell is associated with a greater signal metric level. For example, if the cell conditions of the SpCell305are greater than the cell conditions of the SCell310based on the measured signal metric levels, the UE115will transmit a scheduling request via the scheduling request resource320on the SpCell305and the UE115will refrain from transmitting the scheduling request on the SCell310.

In some other aspects, the UE115may select a scheduling request resource320based on a numerology of the corresponding cell. In the example ofFIG.3, the SpCell305numerology may be greater than the numerology of the SCell310. The UE115may transmit the scheduling request via the scheduling request resource320on the SpCell305based on the numerology being greater, and the UE115may refrain from transmitting the scheduling request via the scheduling request resource320on the SCell310. If the numerologies of the cells are the same or inconclusive, the UE115may be configured with a type of cell (e.g., a default cell) to use for selection. For example, the default cell may be the SpCell305, and the UE115may select the scheduling request resource320on the SpCell305accordingly.

Although the SpCell305and the SCell310are illustrated inFIG.3, it is to be understood that the described techniques for selection of a scheduling request resource320may be applied for scheduling request resources320that are allocated across any type of cells and any quantity of cells, including the cell types illustrated here and any other cell types. In some aspects, the UE115may use a combination of the described techniques for scheduling request resource selection. For example, the UE115may select a scheduling request resource320based on both a power mode of the UE115and a signal metric of the cells, or some other combination.

Additionally, or alternatively, the cell conditions, the selection techniques, or both may change dynamically over time. For example, the UE115may select a scheduling request resource320based on a power mode of the UE115in a first time period and the UE115may select a scheduling request resource320based on a numerology of the cells in a second time period. In such cases, the scheduling request configuration and corresponding scheduling request ID315may be the same or different for the scheduling request resources320allocated in each time period (e.g., a periodic allocation). The UE115may receive control signaling that indicates which conditions to use for selection of a scheduling request resource320at a given time.

The UE115may thus select a scheduling request resource320from a set of non-overlapping scheduling request resources320associated with a same scheduling request ID315and allocated across different cells based on one or more conditions or parameters. The described techniques for selection of a scheduling request resource320may improve communication reliability, improve throughput, reduce ambiguity, reduce latency, and reduce power consumption, among other advantages.

FIG.4illustrates an example of a communication timeline400that supports uplink control channel resource selection for scheduling request transmission in accordance with one or more aspects of the present disclosure. In some examples, the communication timeline400may implement aspects of wireless communications systems100and200as described with reference toFIGS.1and2. For example, the communication timeline400illustrates scheduling request resources420(e.g., PUCCH resources) that are allocated on an SpCell405and an SCell410, which may represent examples of corresponding elements described with reference toFIGS.2and3. In this example, the scheduling request resources420on the SpCell405may at least partially overlap in time with the scheduling request resources420on the SCell410.

The scheduling request resources420may be allocated by a network entity105for a UE115, which may represent examples of corresponding devices as described with reference toFIGS.1-3. For example, the network entity105may transmit control signaling including a scheduling request configuration that allocates the scheduling request resources420on the SpCell405and the SCell410to the UE115, as described with reference toFIG.2. The scheduling request configuration may indicate a scheduling request ID415(e.g., SR id_0, or some other ID) associated with each of the scheduling request resources420that are allocated by the configuration. The scheduling request resources420may include time and frequency resources allocated within a bandwidth of each cell.

The UE115may not support transmission of a scheduling request via scheduling request resources420on different cells that overlap in time. That is, the UE115may not transmit two or more scheduling requests at the same time. In some aspects, the UE115, the network entity105, or both may be configured with a scheduling request timer, such as the scheduling request timer325illustrated inFIG.3, which may prohibit transmission of the scheduling request at the same time. In the example ofFIG.4, the UE115may thus select a single scheduling request resource420from the set of scheduling request resources420associated with the scheduling request ID415to use for transmitting a scheduling request. However, in some cases, the selection of the scheduling request resource420may be ambiguous or random, which may reduce reliability and throughput of communications.

To reduce ambiguity and improve communication reliability as described herein, the UE115may select a scheduling request resource420from the set of scheduling request resources420that are associated with the same scheduling request ID415based on one or more conditions, rules, and parameters. In the example ofFIG.4, the scheduling request configuration may allocate scheduling request resource420on the SpCell405and the SCell410that may occur at the same time. The UE115may select either one of the scheduling request resources420based on the rules and parameters described herein.

For example, if the UE115operates in a reduced power mode, the UE115may select a scheduling request resource420based on a type of cell on which the scheduling request resource420is allocated. In some aspects, the UE115may receive signaling or a configuration that indicates the type of cell (e.g., a rule pertaining to cell selection for scheduling request transmission). In the example ofFIG.4, if the type of the cell indicated by the rule pertaining to cell selection for scheduling request is an SpCell405, the UE115may select the scheduling request resource420on the SpCell inFIG.4. The UE115may transmit a scheduling request via the scheduling request resource420on the SpCell405, and the UE115may refrain from transmitting via the scheduling request resource420on the SCell410(e.g., the UE115may skip this resource).

In some other aspects, the UE115may measure a signal metric (e.g., RSRP, SNR, SINR, or some other signal metric) based on one or more reference signals received via each of the SpCell405and the SCell410. The UE115may select the scheduling request resource420on whichever cell is associated with a greater signal metric level. For example, if the cell conditions of the SpCell405are greater than the cell conditions of the SCell410based on the measured signal metric levels, the UE115may transmit a scheduling request via the scheduling request resource420on the SpCell405and the UE115may refrain from transmitting the scheduling request on the SCell410.

In some other aspects, the UE115may select a scheduling request resource420based on a numerology of the corresponding cell. In the example ofFIG.4, the SpCell405numerology may be greater than the numerology of the SCell410. The UE115may transmit the scheduling request via the scheduling request resource420on the SpCell405based on the numerology being greater, and the UE115may refrain from transmitting the scheduling request via the scheduling request resource420on the SCell410. If the numerologies of the cells are the same or inconclusive, the UE115may be configured with a type of cell (e.g., a default cell) to use for selection. For example, the default cell may be the SpCell405, and the UE115may select the scheduling request resource420on the SpCell405accordingly.

Although the SpCell405and the SCell410are illustrated inFIG.4, it is to be understood that the described techniques for selection of a scheduling request resource420may be applied for scheduling request resources420that are allocated across any type of cells and any quantity of cells, including the cell types illustrated here and any other cell types. In some aspects, the UE115may use a combination of the described techniques for scheduling request resource selection. For example, the UE115may select a scheduling request resource420based on both a power mode of the UE115and a signal metric of the cells, or some other combination.

Additionally, or alternatively, the cell conditions, the selection techniques, or both may change dynamically over time. For example, the UE115may select a scheduling request resource420based on a power mode of the UE115in a first time period and the UE115may select a scheduling request resource420based on a numerology of the cells in a second time period. In such cases, the scheduling request configuration and corresponding scheduling request ID415may be the same or different for the scheduling request resources420allocated in each time period (e.g., a periodic allocation). The UE115may receive control signaling that indicates which conditions to use for selection of a scheduling request resource420at a given time.

The UE115may thus select a scheduling request resource420from a set of scheduling request resources420that at least partially overlap in time, are associated with a same scheduling request ID415, and are allocated across different cells based on one or more conditions or parameters. The described techniques for selection of a scheduling request resource420may improve communication reliability, improve throughput, reduce ambiguity, reduce latency, and reduce power consumption, among other advantages.

FIG.5illustrates an example of a process flow500that supports uplink control channel resource selection for scheduling request transmission in accordance with one or more aspects of the present disclosure. The process flow500may implement or be implemented by aspects of the wireless communications systems100and200or the communication timelines300or400as described with reference toFIGS.1-4. For example, the process flow500illustrates techniques for selecting an scheduling request resource for transmission of a scheduling request between a UE115-band a network entity105-b, which may represent aspects of corresponding devices as described with reference toFIGS.1-4. In some aspects, the UE115-bmay select a scheduling request resource based on various conditions or parameters, as described with reference toFIGS.2-4.

In the following description of the process flow500, the operations between the UE115-band the network entity105-bmay be performed in different orders or at different times. Some operations may also be left out of the process flow500, or other operations may be added. Although the UE115-band the network entity105-bare shown performing the operations of the process flow500, some aspects of some operations may also be performed by one or more other wireless devices.

At505, the network entity105-bmay transmit control signaling to the UE115-b. The control signaling may indicate a first scheduling request resource on a first cell (e.g., an SpCell, or some other type of cell) and a second scheduling request resource on a second cell (e.g., an SCell, or some other type of cell). The control signaling may additionally or alternatively indicate a scheduling request ID for the first and second scheduling request resources, as described with reference toFIGS.3and4.

At510, the UE115-bmay generate a scheduling request. Both of the first scheduling request resource on the first cell and the second scheduling request resource on the second cell may be appliable to the scheduling request. For example, the UE115-bmay generate the scheduling request based on the scheduling request ID indicated via the control signaling, such that the same scheduling request ID may be applicable to the scheduling request and the first and second scheduling request resources.

At515, the UE115-bmay select one of the scheduling request resources for transmission of the scheduling request. The UE115-bmay select the scheduling request resource based on one or more of a power mode of the UE115-b, a signal metric associated with the cells, or a numerology of the cells. In some aspects, the UE115-bmay operate in a reduced power mode. In this case, the scheduling request resource selection may be based on the UE115-boperating in the reduced power mode and a type of the cell associated with the selected scheduling request resource (e.g., an SpCell).

In some other aspects, the UE115-bmay receive one or more reference signals from the network entity105-bvia the first and second cells. The UE115-bmay measure a signal metric associated with the first cell and the second cell based on the one or more reference signals, and the UE115-bmay select the scheduling request resource based on the measured signal metric levels. In some other aspects, the UE115-bmay select the first scheduling request resource based on a numerology of the first cell being greater than a numerology of the second cell.

The selection of the scheduling request resource may be based on both of the first cell and the second cell being associated with the same scheduling request ID as the scheduling request. The first and second scheduling request resources may be non-overlapping in time or at least partially overlapping in time, as described with reference toFIGS.3and4.

At520, the UE115-bmay transmit the scheduling request to the network entity105-bvia the selected scheduling request resource on the corresponding cell. The scheduling request may be transmitted according to a first transmission power that may be based on a value of a signal metric of the cell. For example, if the signal metric is relatively high, the scheduling request may be transmitted with a relatively low transmission power.

The transmitter615may provide a means for transmitting signals generated by other components of the device605. For example, the transmitter615may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to uplink control channel resource selection for scheduling request transmission). In some examples, the transmitter615may be co-located with a receiver610in a transceiver module. The transmitter615may utilize a single antenna or a set of multiple antennas.

The communications manager620, the receiver610, the transmitter615, or various combinations thereof or various components thereof may be examples of means for performing various aspects of uplink control channel resource selection for scheduling request transmission as described herein. For example, the communications manager620, the receiver610, the transmitter615, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

In some examples, the communications manager620may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver610, the transmitter615, or both. For example, the communications manager620may receive information from the receiver610, send information to the transmitter615, or be integrated in combination with the receiver610, the transmitter615, or both to obtain information, output information, or perform various other operations as described herein.

The communications manager620may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager620may be configured as or otherwise support a means for receiving control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell. The communications manager620may be configured as or otherwise support a means for generating a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request. The communications manager620may be configured as or otherwise support a means for selecting the first scheduling request resource for transmission of the scheduling request on the first cell based on one or more of: a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell. The communications manager620may be configured as or otherwise support a means for transmitting the scheduling request via the first scheduling request resource on the first cell based on the selecting.

By including or configuring the communications manager620in accordance with examples as described herein, the device605(e.g., a processor controlling or otherwise coupled with the receiver610, the transmitter615, the communications manager620, or a combination thereof) may support techniques for reduced processing, reduced power consumption, and more efficient utilization of communication resources, among other advantages. For example, by selecting a scheduling request resource based on one or more of a power mode of the device605(e.g., a UE), a signal metric level of a corresponding cell, a numerology of the corresponding cell, the device605may select a reliable resource. For example, the selected resource may be on a cell that is associated with improved transmission power, which may improve reliability of the transmission, or the selected resource may be on a cell that is associated with a greater numerology and may reduce latency of the transmission, or both. The processor of the device605may thus reduce processing associated with retransmissions that may occur if the resource is selected randomly, reduce power consumption, improve communication reliability, and improve throughput by selecting a scheduling request resource according to the described techniques.

The device705, or various components thereof, may be an example of means for performing various aspects of uplink control channel resource selection for scheduling request transmission as described herein. For example, the communications manager720may include a control signaling component725, a scheduling request generation component730, a resource selection component735, or any combination thereof. The communications manager720may be an example of aspects of a communications manager620as described herein. In some examples, the communications manager720, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver710, the transmitter715, or both. For example, the communications manager720may receive information from the receiver710, send information to the transmitter715, or be integrated in combination with the receiver710, the transmitter715, or both to obtain information, output information, or perform various other operations as described herein.

The communications manager720may support wireless communication at a UE in accordance with examples as disclosed herein. The control signaling component725may be configured as or otherwise support a means for receiving control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell. The scheduling request generation component730may be configured as or otherwise support a means for generating a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request. The resource selection component735may be configured as or otherwise support a means for selecting the first scheduling request resource for transmission of the scheduling request on the first cell based on one or more of: a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell. The scheduling request generation component730may be configured as or otherwise support a means for transmitting the scheduling request via the first scheduling request resource on the first cell based on the selecting.

FIG.8shows a block diagram800of a communications manager820that supports uplink control channel resource selection for scheduling request transmission in accordance with one or more aspects of the present disclosure. The communications manager820may be an example of aspects of a communications manager620, a communications manager720, or both, as described herein. The communications manager820, or various components thereof, may be an example of means for performing various aspects of uplink control channel resource selection for scheduling request transmission as described herein. For example, the communications manager820may include a control signaling component825, a scheduling request generation component830, a resource selection component835, a reduced power component840, a reference signal processing component845, a signal metric component850, a transmission power component855, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The communications manager820may support wireless communication at a UE in accordance with examples as disclosed herein. The control signaling component825may be configured as or otherwise support a means for receiving control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell. The scheduling request generation component830may be configured as or otherwise support a means for generating a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request. The resource selection component835may be configured as or otherwise support a means for selecting the first scheduling request resource for transmission of the scheduling request on the first cell based on one or more of: a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell. In some examples, the scheduling request generation component830may be configured as or otherwise support a means for transmitting the scheduling request via the first scheduling request resource on the first cell based on the selecting.

In some examples, the reduced power component840may be configured as or otherwise support a means for operating in a reduced power mode, where selecting the first scheduling request resource may be based on operating in the reduced power mode. In some examples, to support selecting the first scheduling request resource, the resource selection component835may be configured as or otherwise support a means for selecting the first scheduling request resource based on a type of the first cell associated with the first scheduling request resource. In some examples, the type of the first cell is an SpCell. In some examples, selecting the first scheduling request resource is based on the type of the first cell being the SpCell.

In some examples, to support selecting the first scheduling request resource, the resource selection component835may be configured as or otherwise support a means for selecting the first scheduling request resource based on the signal metric associated with the first cell being greater than a second signal metric associated with the second cell.

In some examples, the reference signal processing component845may be configured as or otherwise support a means for receiving one or more reference signals via the first cell and the second cell. In some examples, the signal metric component850may be configured as or otherwise support a means for measuring the signal metric associated with the first cell and the second signal metric associated with the second cell based on the one or more reference signals, where selecting the first scheduling request resource may be based on the measuring.

In some examples, to support transmitting the scheduling request, the transmission power component855may be configured as or otherwise support a means for transmitting the scheduling request according to a first transmission power, the first transmission power based on a value of the signal metric. In some examples, the signal metric and the second signal metric include RSRP metrics.

In some examples, to support selecting the first scheduling request resource, the resource selection component835may be configured as or otherwise support a means for selecting the first scheduling request resource based on the numerology of the first cell being greater than or equal to a numerology of the second cell (e.g., a respective SCS of each cell). In some examples, the numerology of the first cell and the numerology of the second cell may be equal and to support selecting the first scheduling request resource, the resource selection component835may be configured as or otherwise support a means for selecting the first scheduling request resource based on a type of the first cell.

In some examples, the first scheduling request resource and the second scheduling request resource may be at least partially overlapping in time. In some examples, the first scheduling request resource and the second scheduling request resource may be non-overlapping in time.

In some examples, the control signaling indicates a same scheduling request ID for the first scheduling request resource and the second scheduling request resource. In some examples, generating the scheduling request is based on the same scheduling request ID. In some examples, the selecting is based on both the first scheduling request resource and the second scheduling request resource being associated with the same scheduling request ID as the scheduling request.

The communications manager920may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager920may be configured as or otherwise support a means for receiving control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell. The communications manager920may be configured as or otherwise support a means for generating a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request. The communications manager920may be configured as or otherwise support a means for selecting the first scheduling request resource for transmission of the scheduling request on the first cell based on one or more of: a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell. The communications manager920may be configured as or otherwise support a means for transmitting the scheduling request via the first scheduling request resource on the first cell based on the selecting.

By including or configuring the communications manager920in accordance with examples as described herein, the device905may support techniques for improved communication reliability, reduced latency, reduced power consumption, more efficient utilization of communication resources, improved coordination between devices, and longer battery life, among other advantages.

At1005, the method may include receiving control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell. The operations of1005may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1005may be performed by a control signaling component825as described with reference toFIG.8.

At1010, the method may include generating a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request. The operations of1010may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1010may be performed by a scheduling request generation component830as described with reference toFIG.8.

At1015, the method may include selecting the first scheduling request resource for transmission of the scheduling request on the first cell based on one or more of: a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell. The operations of1015may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1015may be performed by a resource selection component835as described with reference toFIG.8.

At1020, the method may include transmitting the scheduling request via the first scheduling request resource on the first cell based on the selecting. The operations of1020may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1020may be performed by a scheduling request generation component830as described with reference toFIG.8.

At1105, the method may include receiving control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell. The operations of1105may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1105may be performed by a control signaling component825as described with reference toFIG.8.

At1110, the method may include generating a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request. The operations of1110may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1110may be performed by a scheduling request generation component830as described with reference toFIG.8.

At1115, the method may include operating in a reduced power mode. In some aspects, the UE may switch to operating in the reduced power mode, or the UE may continue operating in the reduced power mode. The operations of1115may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1115may be performed by a reduced power component840as described with reference toFIG.8.

At1120, the method may include selecting the first scheduling request resource for transmission of the scheduling request on the first cell based on the UE operating in the reduced power mode. The operations of1120may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1120may be performed by a resource selection component835as described with reference toFIG.8.

At1125, the method may include transmitting the scheduling request via the first scheduling request resource on the first cell based on the selecting. The operations of1125may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1125may be performed by a scheduling request generation component830as described with reference toFIG.8.

At1205, the method may include receiving control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell. The operations of1205may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1205may be performed by a control signaling component825as described with reference toFIG.8.

At1210, the method may include generating a scheduling request at the UE, where both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request. The operations of1210may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1210may be performed by a scheduling request generation component830as described with reference toFIG.8.

At1215, the method may include receiving one or more reference signals via the first cell and the second cell. The operations of1215may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1215may be performed by a reference signal processing component845as described with reference toFIG.8.

At1220, the method may include measuring a signal metric associated with the first cell and a second signal metric associated with the second cell based on the one or more reference signals. The operations of1220may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1220may be performed by a signal metric component850as described with reference toFIG.8.

At1225, the method may include selecting the first scheduling request resource for transmission of the scheduling request on the first cell based on the signal metric associated with the first cell being greater than a second signal metric associated with the second cell. The operations of1225may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1225may be performed by a resource selection component835as described with reference toFIG.8.

At1230, the method may include transmitting the scheduling request via the first scheduling request resource on the first cell based on the selecting. The operations of1230may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1230may be performed by a scheduling request generation component830as described with reference toFIG.8.

Aspect 1: A method for wireless communication at a UE, comprising: receiving control signaling that indicates a first scheduling request resource on a first cell and a second scheduling request resource on a second cell; generating a scheduling request at the UE, wherein both the first scheduling request resource on the first cell and the second scheduling request resource on the second cell are applicable to the scheduling request; selecting the first scheduling request resource for transmission of the scheduling request on the first cell based at least in part on one or more of: a power mode of the UE, a signal metric associated with the first cell, or a numerology of the first cell; and transmitting the scheduling request via the first scheduling request resource on the first cell based at least in part on the selecting.

Aspect 2: The method of aspect 1, further comprising: operating in a reduced power mode, wherein selecting the first scheduling request resource is based at least in part on operating in the reduced power mode.

Aspect 3: The method of aspect 2, wherein selecting the first scheduling request resource comprises: selecting the first scheduling request resource based at least in part on a type of the first cell associated with the first scheduling request resource.

Aspect 4: The method of aspect 3, wherein the type of the first cell is an SpCell; and selecting the first scheduling request resource is based at least in part on the type of the first cell being the SpCell.

Aspect 5: The method of aspect 1, wherein selecting the first scheduling request resource comprises: selecting the first scheduling request resource based at least in part on the signal metric associated with the first cell being greater than a second signal metric associated with the second cell.

Aspect 6: The method of aspect 5, further comprising: receiving one or more reference signals via the first cell and the second cell; and measuring the signal metric associated with the first cell and the second signal metric associated with the second cell based at least in part on the one or more reference signals, wherein selecting the first scheduling request resource is based at least in part on the measuring.

Aspect 7: The method of any of aspects 5 through 6, wherein transmitting the scheduling request comprises: transmitting the scheduling request according to a first transmission power, the first transmission power based at least in part on a value of the signal metric.

Aspect 8: The method of any of aspects 5 through 7, wherein the signal metric and the second signal metric comprise RSRP metrics.

Aspect 9: The method of aspect 1, wherein selecting the first scheduling request resource comprises: selecting the first scheduling request resource based at least in part on the numerology of the first cell being greater than or equal to a numerology of the second cell.

Aspect 10: The method of aspect 9, wherein the numerology of the first cell and the numerology of the second cell are equal, and wherein selecting the first scheduling request resource comprises: selecting the first scheduling request resource based at least in part on a type of the first cell.

Aspect 11: The method of any of aspects 1 through 10, wherein the first scheduling request resource and the second scheduling request resource are at least partially overlapping in time.

Aspect 12: The method of any of aspects 1 through 10, wherein the first scheduling request resource and the second scheduling request resource are non-overlapping in time.

Aspect 13: The method of any of aspects 1 through 12, wherein: the control signaling indicates a same scheduling request ID for the first scheduling request resource and the second scheduling request resource; generating the scheduling request is based at least in part on the same scheduling request ID; and the selecting is based at least in part on both the first scheduling request resource and the second scheduling request resource being associated with the same scheduling request ID as the scheduling request.

The term “determine” or “determining” encompasses a variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure), ascertaining and the like. Also, “determining” can include receiving (such as receiving information), accessing (such as accessing data in a memory) and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing and other such similar actions.